US20150150588A1 - Rotational atherectomy device with exchangeable drive shaft and meshing gears - Google Patents

Abstract

An atherectomy device with an exchangeable drive shaft is disclosed, having a drive shaft gear at a distal end of the exchangeable drive shaft for meshing engagement with a prime mover gear on the output shaft of the prime mover. The exchangeable drive shaft is inserted into an opening at the distal end of the handle housing and moved axially in a proximal direction. Surface features on at least the prime mover housing and the engageable drive shaft help to align the drive shaft gear with the prime mover gear for meshing engagement.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• This application is a divisional of U.S. patent application Ser. No. 14/340,353 filed Jul. 24, 2014 which claims the benefit of U.S. Provisional Application No. 61/950,402, filed Mar. 10, 2014, and the benefit of U.S. Provisional Application No. 61/858,345 filed Jul. 25, 2013, the entirety of which prior filed applications are hereby incorporated by reference.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
• Not Applicable
BACKGROUND OF THE INVENTION
• 1. Field of the Invention
• The disclosure relates to devices and methods for removing tissue from body passageways, such as removal of atherosclerotic plaque from arteries, utilizing a rotational atherectomy device. In particular, the disclosure relates to improvements in a rotational atherectomy device having an exchangeable drive shaft.
• 2. Description of the Related Art
• A variety of techniques and instruments have been developed for use in the removal or repair of tissue in arteries and similar body passageways. A frequent objective of such techniques and instruments is the removal of atherosclerotic plaque in a patient's arteries. Atherosclerosis is characterized by the buildup of fatty deposits (atheromas) in the intimal layer (i.e., under the endothelium) of a patient's blood vessels. Very often over time what initially is deposited as relatively soft, cholesterol-rich atheromatous material hardens into a calcified atherosclerotic plaque. Such atheromas restrict the flow of blood, and therefore often are referred to as stenotic lesions or stenoses, the blocking material being referred to as stenotic material. If left untreated, such stenoses can cause angina, hypertension, myocardial infarction, strokes and the like.
• Several kinds of atherectomy devices have been developed for attempting to remove some or all of such stenotic material. In one type of device, such as that shown in U.S. Pat. No. 4,990,134 (Auth), a rotating burr covered with an abrasive cutting material, such as diamond grit (diamond particles or dust), is carried at the distal end of a flexible, rotatable drive shaft.
• U.S. Pat. No. 5,314,438 (Shturman) shows another atherectomy device having a rotatable drive shaft with a section of the drive shaft having an enlarged diameter, at least a segment of this enlarged diameter section being covered with an abrasive material to define an abrasive segment of the drive shaft. When rotated at high speeds, the abrasive segment is capable of removing stenotic tissue from an artery.
• U.S. Pat. No. 5,314,407 (Auth) shows details of a type of handle which may be used in conjunction with rotational atherectomy devices of the type shown in the Auth '134 and Shturman '438 patents. A handle of the type shown in the Auth '407 patent has been commercialized by Heart Technology, Inc. (Redmond, Wash.), now owned by Boston Scientific Corporation (Natick, Mass.) in the rotational atherectomy device sold under the trademark Rotablator®. The handle of the Rotablator® device includes a variety of components, including a compressed gas driven turbine, a mechanism for clamping a guide wire extending through the drive shaft, portions of a fiber optic tachometer, and a pump for pumping saline through the drive shaft.
• The connection between the drive shaft (with its associated burr) and the turbine in the Rotablator® device is permanent; yet, frequently it is necessary to use more than one size burr during an atherectomy procedure. That is, often a smaller size burr is first used to open a stenosis to a certain diameter, and then one or more larger size burrs are used to open the stenosis further. Such use of multiple burrs of subsequently larger diameter is sometimes referred to as a “step up technique” and is recommended by the manufacturer of the Rotablator® device. In the multiple burr technique it is necessary to use a new Rotablator® device for each such successive size burr. Accordingly, there is a need for an atherectomy system that would permit a physician to use only one handle throughout an entire procedure and to attach to such handle an appropriate drive shaft and tissue removing implement (e.g., a burr) to initiate the procedure and then exchange the drive shaft and the tissue removing implement for a drive shaft having a tissue removing implement of a different size or even a different design.
• A subsequent version of the Rotablator® has been introduced with the ability to exchange a flexible distal portion of the drive shaft together with a burr for another distal portion of a drive shaft having a different size burr. Technical details of such a system are contained in U.S. Pat. No. 5,766,190, titled “Connectable driveshaft system”, and issued on Jun. 16, 1998 to Wulfman. This system utilizes a flexible drive shaft having a connect/disconnect feature allowing the physician to disconnect the exchangeable distal portion of the flexible drive shaft together with the burr from the flexible proximal portion of the drive shaft which is connected to the turbine of the handle, thus permitting the burr size to be changed without discarding the entire atherectomy unit. Each exchangeable drive shaft portion is disposed within its own exchangeable catheter and catheter housing. The flexible proximal portion of the drive shaft in this system is permanently attached to the turbine and is not exchanged. This system has been commercialized by Boston Scientific under the trademark Rotalink System®. While the Rotalink System® does permit one to change the burr size, the steps required to actually disconnect the exchangeable portion of the drive shaft and replace it with another exchangeable portion of the drive shaft are quite involved and require relatively intricate manipulation of very small components.
• First, a catheter housing must be disconnected from the handle and moved distally away from the handle to expose portions of both the proximal and distal sections of the flexible drive shaft which contain a disconnectable coupling. This coupling is disconnected by sliding a lock tube distally, permitting complementary lock teeth on the proximal and distal portions of the flexible drive shaft to be disengaged from each other. A similar flexible distal drive shaft portion with a different burr may then be connected to the flexible proximal portion of the drive shaft. To accomplish such assembly, the lock tooth on the proximal end of the distal replacement portion of the drive shaft must first be both longitudinally and rotationally aligned with the complementary lock tooth at the distal end of the proximal portion of the drive shaft. Since the flexible drive shaft typically is less than 1 mm in diameter, the lock teeth are similarly quite small in size, requiring not insignificant manual dexterity and visual acuity to properly align and interlock the lock teeth. Once the lock teeth have been properly interlocked with each other, the lock tube (also having a very small diameter) is slid proximally to secure the coupling. The catheter housing must then be connected to the handle housing.
• While this system does permit one to exchange one size burr (together with a portion of the drive shaft) for a burr of another size, the exchange procedure is not an easy one and must be performed with considerable care. The individual performing the exchange procedure must do so while wearing surgical gloves to protect the individual from the blood of the patient and to maintain the sterility of the elements of the system. Surgical gloves diminish the tactile sensations of the individual performing the exchange procedure and therefore make such exchange procedure even more difficult.
• In recent years, there has been an effort to develop an atherectomy device with easier attachment and/or exchange of the drive shaft and its tissue removing implement.
• For instance, U.S. Pat. No. 6,024,749 (Shturman et al), U.S. Pat. No. 6,077,282 (Shturman et al), U.S. Pat. No. 6,129,734 (Shturman et al) and U.S. Pat. No. 6,852,118 (Shturman et al), all incorporated by reference in their entirety herein, disclose an atherectomy device having an exchangeable drive shaft cartridge comprising a housing that is removably attachable to the device's handle housing. The exchangeable cartridge includes a longitudinally movable tube that is removably attached to the prime mover carriage and a rotatable drive shaft that is removably attachable to the prime mover. A coupling is provided which connects the longitudinally extendible tube to the prime mover while indexing the relative position of the longitudinally extendible tube and the proximal portion of the drive shaft. U.S. Patent Publication No. 2011/0087254 (Welty), incorporated by reference in its entirety herein, discloses an atherectomy device where the prime mover has a prime mover coupler and the drive shaft has a drive shaft coupler that is engageable with the prime mover coupler. The drive shaft coupler and prime mover coupler have engageable lateral cross-sections that are complementary and geometrically keyed to one another. When they are engaged to one another, the complementary cross-sections allow axial translation between the drive shaft coupler and the prime mover coupler while prohibiting rotational coupler between the drive shaft coupler and the prime mover coupler.
• Other atherectomy devices, such as U.S. Patent Pub. No. 2011/0077673 (Grubac et al), utilize a magnetic clutch connection between the drive shaft and the prime mover. The drive shaft and the prime mover are held together longitudinally by a magnetic attractive force between the motor plate and the drive shaft plate. The torques between the motor and the drive shaft are transmitted completely between the motor plate and the drive shaft plate and, when below a threshold torque, the motor plate and the drive shaft plate remain held together rotationally by static friction. When the torques between the motor and the drive shaft are greater than the threshold torque, the motor plate and the drive shaft plate slip rotationally past each other, causing a residual torque to be transmitted between the motor and the drive shaft.
• Although the above devices utilize friction or magnetic couplings to removably engage the drive shaft with the prime mover, some atherectomy devices have a driveshaft driven by a pair of mating gears, one gear connected to the drive shaft and one gear connected to the mating gear. Due to this gearing arrangement, the atherectomy device is generally restricted to one shaft size per assembly. Typically the gear connected to the drive shaft is not replaced, so any exchangeable drive shaft must be sized to properly engage with the drive shaft. Thus, multiple atherectomy devices are needed for each desired drive shaft diameter.
• Accordingly, there exists a need for an atherectomy device with the mating gear assembly where the drive shaft is exchangeable for another drive shaft of either the same size or another size.
BRIEF SUMMARY OF THE INVENTION
• An embodiment of a rotational atherectomy device includes a handle having a proximal section, a distal section having a channel extending proximally from an opening in a distal end of the handle, and an elongated hollow intermediate section between the proximal and the distal sections. The intermediate section includes an opening between an interior thereof and the channel in the distal section, and a slot. The device further includes a prime mover carriage having a prime mover, and a prime mover gear fixedly attached to a shaft of the prime mover. The prime mover carriage is disposed within the interior of the intermediate section. The device further includes a control knob having at least a portion thereof extending through the slot in the intermediate section and operationally coupled to the prime mover carriage such that a longitudinal displacement of the control knob induces a longitudinal displacement of the prime mover carriage. The control knob is operable to an unlocked state for permitting the longitudinal displacement of the control knob, and to a locked state for inhibiting the longitudinal displacement of the control knob. Some embodiments of the device include an exchangeable drive shaft cartridge having a proximal section and a distal section, and a drive shaft having a proximal end and a distal end. The drive shaft extends through an opening in the distal section of the drive shaft cartridge. The drive shaft cartridge includes a gear engagement assembly having a drive shaft gear fixedly attached to the proximal end of the drive shaft. Some embodiments of the device include one or more connectors for removably connecting the distal section of the handle and the distal section of the drive shaft cartridge to one another. Certain embodiments of the one or more connectors includes complementary first and second sections, wherein the first section of each connector is integrally formed with the distal section of handle, and the complementary second section of each connector is integrally formed with the distal section of the drive shaft cartridge. The device includes at least one alignment element on at least one of the gear engagement assembly, the prime mover carriage and the interior of the intermediate section of the handle. The at least one alignment element is configured for aligning at least the prime mover gear and the drive shaft gear with one another when the gear engagement assembly is extended into the interior of the intermediate section and positioned proximate the prime mover. The device further includes at least one biasing element configured for removably meshing the prime mover gear and the drive shaft gear when the prime mover gear and the drive shaft gear are aligned with one another such that a rotational movement of one of the prime mover and the drive shaft induces a rotational movement in the other.
• Another embodiment of a rotational atherectomy device includes a handle having a proximal section, a distal section having a channel extending proximally from an opening in a distal end of the handle, and an elongated intermediate section having a trough extending between the proximal and the distal sections. The device further includes a prime mover carriage having a prime mover, and a prime mover gear fixedly attached to a shaft of the prime mover. The prime mover carriage disposed within the trough of the intermediate section. Some embodiments of the device include an exchangeable drive shaft cartridge having a proximal section and a distal section, a slot in an inter mediate section extending between the proximal and the distal sections, a drive shaft having a proximal end and a distal end. The drive shaft extends through an opening in the distal section of the drive shaft cartridge. The drive shaft cartridge includes a gear engagement assembly having a drive shaft gear fixedly attached to the proximal end of the drive shaft, and a control knob having at least a portion thereof extending through the slot and operationally coupled to the drive shaft cartridge such that a longitudinal displacement of the control knob induces a longitudinal displacement of the drive shaft cartridge. The control knob can be operated to an unlocked state for permitting the longitudinal displacement of the control knob, and to a locked state for inhibiting the longitudinal displacement of the control knob. Certain embodiments of the device include one or more connectors for removably connecting the handle and the drive shaft cartridge to one another. Some embodiments of the one or more connectors include complementary first and second sections, wherein the first section is integrally formed with the handle, and the complementary second section is integrally formed with the drive shaft cartridge. The handle and the drive shaft cartridge are removably connected by removably meshing the prime mover gear and the drive shaft gear by juxtaposing the prime mover carriage and the gear engagement assembly, and concurrently displacing the handle and the drive shaft cartridge in opposite directions.
• Yet another embodiment of a rotational atherectomy device includes a handle having a proximal section, a distal section having a trough, and an elongated hollow intermediate section between the proximal and the distal sections. The intermediate section includes an opening between an interior thereof and the trough, and a slot. The device further includes a prime mover carriage having a prime mover and a prime mover gear fixedly attached to a shaft of the prime mover. In some embodiments, the prime mover carriage is disposed within the interior of the intermediate section. Some embodiments of the device include a control knob having at least a portion thereof extending through the slot and operationally coupled to the prime mover carriage such that a longitudinal displacement of the control knob induces a longitudinal displacement of the prime mover carriage. The control knob can be operated to an unlocked state for permitting the longitudinal displacement of the control knob, and to a locked state for inhibiting the longitudinal displacement of the control knob. The device further includes an exchangeable drive shaft cartridge having a proximal section and a distal section, and a drive shaft having a proximal end and a distal end. The drive shaft extends through an opening in the distal section of the drive shaft cartridge. The drive shaft cartridge includes a gear engagement assembly having a drive shaft gear fixedly attached to the proximal end of the drive shaft, and one or more connectors for removably connecting the handle and the drive shaft cartridge to one another, wherein each of the one or more connectors includes complementary first and second sections, wherein the first section is integrally formed with the handle and the complementary second section is integrally formed with the drive shaft cartridge. The handle and the drive shaft cartridge are removably connected by inserting at least the gear engagement assembly through the opening in the intermediate section of the handle, removably meshing the prime mover gear and the drive shaft gear by juxtaposing the prime mover carriage and the gear engagement assembly, and displacing the handle and the drive shaft cartridge in opposite directions.
• Another embodiment of a rotational atherectomy device includes a handle having a proximal section, a distal section, and an elongated hollow intermediate section between the proximal and the distal sections. The intermediate section includes a door for accessing an interior thereof, an opening between the interior and the distal section, and a slot. The device further includes a prime mover carriage having a prime mover, and a prime mover gear fixedly attached to a shaft of the prime mover. In certain embodiments, the prime mover carriage is disposed within the interior of the intermediate section. Some embodiments of the device include a control knob having at least a portion thereof extending through the slot and operationally coupled to the prime mover carriage such that a longitudinal displacement of the control knob induces a longitudinal displacement of the prime mover carriage. Certain embodiments of the control knob can be operated to an unlocked state for permitting the longitudinal displacement of the control knob, and to a locked state for inhibiting the longitudinal displacement of the control knob. The device further includes an exchangeable drive shaft cartridge having a drive shaft extending between a proximal end and a distal end, and through an opening in a distal section of the drive shaft cartridge. The drive shaft cartridge includes a gear engagement assembly having a drive shaft gear fixedly attached to the proximal end of the drive shaft. Certain embodiments of the device include a first connector for removably and pivotally connecting the prime mover carriage and the gear engagement assembly to one another and for aligning at least the prime mover gear and the drive shaft gear with one another. Some embodiments of the first connector include complementary first and second sections, wherein the first section is integrally formed with the prime mover carriage, and the second section is integrally formed with the gear engagement assembly. The device further includes a second connector for removably connecting the handle and the drive shaft cartridge to one another, wherein removably connecting the handle and the drive shaft cartridge using the second connector removably meshes the prime mover gear and the drive shaft gear, such that a rotational movement of one of the prime mover and the drive shaft induces a rotational movement in the other.
• Yet another embodiment of a rotational atherectomy device includes a handle having a proximal section, a distal section having a channel extending proximally from an opening in a distal end of the handle, and an elongated hollow intermediate section between the proximal and the distal sections. The intermediate section includes an opening between an interior thereof and the channel in the distal section, and a slot. Embodiments of the device include a prime mover carriage having a prime mover, and a prime mover gear fixedly attached to a shaft of the prime mover. In certain embodiments, the prime mover carriage is disposed within the interior of the intermediate section. Some embodiments of the device include a control knob having at least a portion thereof extending through the slot and operationally coupled to the prime mover carriage such that a longitudinal displacement of the control knob induces a longitudinal displacement of the prime mover carriage. In certain embodiments, the control knob can be operated to an unlocked state for permitting the longitudinal displacement of the control knob, and to a locked state for inhibiting the longitudinal displacement of the control knob. Embodiments of the device further include an exchangeable drive shaft cartridge having a proximal section and a distal section, a drive shaft extending between a proximal end and a distal end. The drive shaft extends through an opening in the distal section of the drive shaft cartridge. The drive shaft cartridge includes a gear engagement assembly having a drive shaft gear fixedly attached to the proximal end of the drive shaft. Some embodiments of the device include a first connector for removably and pivotally connecting the handle and the drive shaft cartridge to one another, and a second connector for removably connecting the handle and the drive shaft cartridge to one another.
• In some embodiments of the device, the first connector is a pivoting connector having complementary first and second sections, wherein the first section is integrally formed with the distal section of the handle, and the complementary second section is integrally formed with the drive shaft cartridge. In certain embodiments, the second connector includes complementary first and second sections, wherein the first section is integrally formed with the handle, and the second section is integrally formed with the proximal section of the drive shaft cartridge. Removably connecting the handle and the drive shaft cartridge using the second connector removably meshes the prime mover gear and the drive shaft gear, such that a rotational movement of one of the prime mover and the drive shaft induces a rotational movement in the other.
• In certain embodiments of the device, the first connector is a pivoting connector having complementary first and second sections, wherein the first section is integrally formed with the handle, and the second section is integrally formed with the proximal section of the drive shaft cartridge. In some embodiments, the second connector includes complementary first and second sections, wherein the first section is integrally formed with the distal section of the handle, and the second section is integrally formed with the drive shaft cartridge. At least the prime mover gear and the drive shaft gear are aligned with one another when the handle and the drive shaft cartridge are removably and pivotally connected using the first connector. Removably connecting the handle and the drive shaft cartridge using the second connector removably meshes the prime mover gear and the drive shaft gear, such that a rotational movement of one of the prime mover and the drive shaft induces a rotational movement in the other.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
• FIG. 1A is a perspective view of an embodiment of a rotational atherectomy device;
• FIG. 1B illustrates the device ofFIG. 1A in an unloaded state;
• FIG. 1C is a longitudinal cross-sectional view of the device ofFIG. 1A;
• FIG. 1D is a perspective view of an embodiment of an exchangeable drive shaft cartridge for the device ofFIG. 1A;
• FIG. 1 E is a perspective view of the drive shaft cartridge ofFIG. 1D illustrating a drive shaft in a telescoped state;
• FIG. 1F is a longitudinal cross-sectional view of at least a portion of a distal section of the drive shaft cartridge ofFIG. 1D;
• FIG. 2A is a detailed longitudinal cross-sectional view of an embodiment of a prime mover carriage within the unloaded device ofFIG. 1B;
• FIG. 2B is a detailed longitudinal cross-sectional view of the prime mover carriage ofFIG. 2A with the exchangeable drive shaft cartridge ofFIG. 1D attached thereto;
• FIG. 2C is a detailed perspective view of a proximal section of the exchangeable drive shaft cartridge ofFIG. 1D;
• FIG. 3A is a longitudinal cross-sectional view illustrating embodiments of a prime mover carriage and a gear engagement assembly in an un-meshed state;
• FIG. 3B is a longitudinal cross-sectional view illustrating the prime mover carriage and the gear engagement assembly ofFIG. 3A in a un-meshed state;
• FIG. 4A is a perspective view of a distal section in an embodiment of an exchangeable drive shaft cartridge for another embodiment of a rotational atherectomy device;
• FIG. 4B is a cross-section view of a portion of the distal section ofFIG. 4A;
• FIG. 4C is a perspective view of a handle configured for removably connecting with the distal section ofFIG. 4A;
• FIG. 4D is a top view of a distal section of the handle ofFIG. 4C;
• FIG. 5 is a perspective view of another embodiment of a rotational atherectomy device in a dis-assembled state;
• FIG. 6 is a perspective view of yet another embodiment of a rotational atherectomy device in a dis-assembled state;
• FIG. 7A is a perspective view of an embodiment of a rotational atherectomy device;
• FIG. 7B is a side view illustrating an embodiment of a pivoting connector for a prime mover carriage and an exchangeable drive shaft cartridge in the device ofFIG. 7A;
• FIG. 8 is a side view of another embodiment of a rotational atherectomy device;
• FIG. 9 is a side view of yet another embodiment of a rotational atherectomy device; and
• FIG. 10 is a block diagram representation of an embodiment of a system for performing an atherectomy procedure.
DETAILED DESCRIPTION OF THE INVENTION
• In the following detailed description of the various embodiments illustrated in the appended figures, like components and elements are identified using like reference numerals.
• FIGS. 1A and 1B, respectively, are perspective views of an embodiment of arotational atherectomy device100 in a “loaded” and an “unloaded” state, andFIG. 1C is a longitudinal cross-sectional view thedevice100 in the “loaded” state. Thedevice100 includes ahandle102 and an exchangeabledrive shaft cartridge104 that can be removably connected to one another. Thedevice100 is considered to be in the “loaded” state when thehandle102 and thedrive shaft cartridge104 are connected to one another, and is considered to be in the “unloaded” state when thehandle102 and thedrive shaft cartridge104 are separated from one another. Thedrive shaft cartridge104 is referenced as “exchangeable” because thedevice100 is configured for enabling an operator to use different drive shaft cartridges with thesame handle102.
• In some embodiments, thehandle102 includes aproximal section106, adistal section108, and an elongated hollowintermediate section110 extending between the proximal anddistal sections106 and108, respectively. In some embodiments, thedistal section108 includes achannel112 extending proximally from anopening114 in adistal end116 of thehandle102. Thechannel112 and theopening114 are configured for passage therethrough of at least a portion of thedrive shaft cartridge104. Theintermediate section110 includes anopening118 between alongitudinally extending interior120 of theintermediate section110 and thechannel112 in thedistal section108. Theopening118 is also configured for passage therethrough of at least a portion of thedrive shaft cartridge104. Theintermediate section110 further includes alongitudinally extending slot122 extending into the interior120.
• The interior120 is configured for housing and for the longitudinal displacement therewithin of aprime mover carriage124. As further described elsewhere with reference toFIGS. 2A and 2B, theprime mover carriage124 includes aprime mover126 having aprime mover gear128 fixedly attached to ashaft130 of theprime mover126. In some embodiments, theprime mover126 is a turbine that can be operated using a variety of means including fluids such as liquid and compressed gas. In other embodiments, theprime mover126 is an electric motor that can be operated using a variety of electrical sources including an alternate current (AC) source and a direct current (DC) source.
• Thedevice100 further includes at least onecontrol knob132 having aportion134 extending through theslot122 and operationally coupled to theprime mover carriage124. Accordingly, a longitudinal displacement of thecontrol knob132 as indicated by thearrow136 will induce a longitudinal displacement of theprime mover carriage124, and theprime mover126 included therewith. In some embodiments, a position of theprime mover carriage124 within theintermediate section110 can be fixed or locked, as needed, using thecontrol knob132. For instance, thecontrol knob132 can be operated into a locked state for inhibiting the longitudinal displacement of thecontrol knob132 and of theprime mover carriage124 coupled thereto. The longitudinal displacement of thecontrol knob132, and of theprime mover carriage124 coupled thereto, can be enabled or permitted by operating thecontrol knob132 into an unlocked state. In some embodiments, the locked and unlocked state are attained by rotating thecontrol knob132. In alternate embodiments, thecontrol knob132 can be operated in a different manner for providing the described functionality. In other embodiments, alternative configurations can be included for fixing or locking the position of theprime mover carriage124, wherein thecontrol knob132, or some other means, is used for the longitudinal displacement of theprime mover carriage124. All alternatives as may become apparent to those having ordinary skill in the art are considered as being within the metes and bounds of the instant disclosure.
• FIG. 1D is a perspective view of an embodiment of the exchangeabledrive shaft cartridge104. As illustrated, the exchangeabledrive shaft cartridge104 includes aproximal section138, adistal section140, adrive shaft142, and agear engagement assembly144. Thedrive shaft142 includes a proximal end and a distal end, and extends through anopening146 in thedistal section140. In some embodiments, theopening146 is through a distal end of thedrive shaft cartridge104. However, this is neither required or necessary. For instance, in alternate embodiments, thedrive shaft142 can extend through an opening in a side of thedistal section140. Thegear engagement assembly144 includes adrive shaft gear148 fixedly attached to the proximal end of thedrive shaft142 such that rotating thedrive shaft gear148 will rotate thedrive shaft142.
• In some embodiments, theprime mover gear128 and the drive shaft gear154 can be removably meshed (or engaged). As such, when the gears are meshed, operating theprime mover126 will induce a rotational movement in theprime mover gear128, thedrive shaft gear148 and thedrive shaft142. The rotational movement of thedrive shaft142 can be stopped by un-meshing (or disengaging) theprime mover gear128 and thedrive shaft gear148 and/or by stopping theprime mover126. As will be apparent to those having ordinary skill in the art, the rotational speed of thedrive shaft142 will be determined at least in part by the gear ratio of thedrive shaft gear148 to theprime mover gear128 and by the rotational speed of theprime mover126. In certain embodiments, theprime mover gear128 and thedrive shaft gear148 are substantially similar in that they are of the same diameter and have the same number of teeth. In such embodiments, theprime mover gear128 and thedrive shaft gear148 will have substantially similar rotational speeds. In other embodiments, theprime mover gear128 and thedrive shaft gear148 can have different rotational speeds such that one of the two meshed gears rotates faster or slower than the other. As will be apparent to those having ordinary skill in the art, this can be accomplished by decreasing the diameter and increasing the number of teeth for one of the two gears relative to the other. While the embodiments describe and illustrate only oneprime mover gear128 and only onedrive shaft gear142, such arrangements and quantities of gears should not be considered as limiting. For instance, although not shown, some embodiments of thedevice100 may include a gear box having one or more additional gears meshed with the oneprime mover gear128 and the onedrive shaft gear148.
• In some embodiments, theprime mover126 and thedrive shaft142 are rotatably coupled with a mechanism that can both engage and disengage theprime mover126 and thedrive shaft142 from one another. In a non-limiting exemplary embodiment, the mechanism is a clutch mechanism, including a magnetic clutch.
• In order to use thedevice100, it must be “loaded” by connecting thehandle102 and thedrive shaft cartridge104 to one another such that theprime mover gear128 and thedrive shaft gear148 are meshed. In some embodiments, this is accomplished by inserting at least thegear engagement assembly144 into thehandle102 and juxtaposing it with theprime mover carriage124.
• Thechannel112 and theopenings114 and118 are configured for passage therethrough of at least thegear engagement assembly144. Thegear engagement assembly144 is inserted into theopening114, advanced through thechannel112 and theopening118, and into theinterior120 of theintermediate section110. Thereafter, theprime mover carriage124 and thegear engagement assembly144 are advanced towards one another, either in combination or individually one towards the other, until theprime mover gear128 and driveshaft gear148 are aligned with one another. In some embodiments, before thegear engagement assembly144 is advanced through theopening118, theprime mover carriage124 is displaced towards theopening118 and held thereat by operating thecontrol knob132 to its locked state. Thereafter, thegear engagement assembly144 is advanced through theopening118 until theprime mover gear128 and driveshaft gear148 are aligned with one another.
• For ensuring alignment of theprime mover gear128 and driveshaft gear148, some embodiments of thedevice100 include at least one alignment element for guiding at least thegear engagement assembly144. In some embodiments of thedevice100, at least a portion of an alignment element is provided in one or more of thechannel112, theopenings114 and118, the interior120, theprime mover carriage124, and thegear engagement assembly144. In certain embodiments of thedevice100, the alignment element can include at least a first and a second complementary section, wherein the first section is disposed on thegear engagement assembly144 and the second section is disposed on any one or more of thechannel112, theopenings114 and118, the interior120, and theprime mover carriage124. For instance, the alignment element may include a tongue-and-groove configuration, wherein the first section, i.e., the tongue, is disposed on thegear engagement assembly144 and the second section, i.e., the groove, is contiguously or sectionally (e.g., piece-wise) disposed on one or more of thechannel112, theopenings114 and118, the interior120, and theprime mover carriage124. Of course, the components or elements of thedevice100 on which the tongue and the groove are disposed can be reversed. It should be appreciated that it is not always necessary or a requirement that the alignment element include both a first and a section. In some embodiments, the components and/or elements of thedevice100 can be configured such that only one section of the alignment element is required. Some non-limiting examples for the alignment element include one or more ramps, ribs, rails, and channels. All alternative configurations for the alignment element as may become apparent to those having ordinary skill in the art are considered as being within the metes and bounds of the instant disclosure.
• A non-limiting exemplary embodiment of an alignment element having first and second complementary sections is illustrated inFIGS. 2A-2C.FIG. 2A is a detailed cross-sectional view illustrating a state of theprime mover carriage124 without thegear engagement assembly144 attached thereto;FIG. 2B is a detailed cross-sectional view illustrating a state of theprime mover carriage124 with thegear engagement assembly144 attached thereto; andFIG. 2C is a close-up perspective view of theproximal section138 of thedrive shaft cartridge104. In the illustrated embodiment, the alignment element includes a first and a second section. The first section, disposed on theprime mover carriage124, is defined at least in part by aninsertion channel150. In some embodiments, theinsertion channel150 is defined at least in part by first andsecond guides152 and154, respectively. In some embodiments, the second guide154 is defined at least in part by a ramped planar surface having a thickness that increases from a distal end to a proximal end of the second guide154. The second section of the alignment element, illustrated inFIG. 2C, is disposed on at least theproximal section138 of thedrive shaft carriage104. In the illustrated embodiment, the second section is defined at least in part by one ormore indents156,158 configured for slidable engagement with one or both of the first andsecond guides152 and154.
• In some embodiments, thedevice100 includes at least one biasing element for meshing the alignedprime mover gear128 and the drive shaft gear154 such that when the gears are meshed, a rotational movement of one of theprime mover126 and thedrive shaft142 will induce a rotational movement in the other. In some embodiments, the at least one biasing element displaces at least theprime mover gear126 towards a location whereat thedrive shaft gear142 will be positioned when thegears126 and142 are aligned. In other embodiments, the at least one biasing element displaces at least thedrive shaft gear142 towards a location whereat theprime mover gear126 will be positioned when thegears126 and142 are aligned. In alternate embodiments, thedevice100 can include one or more biasing elements configured for displacing both theprime mover gear126 and thedrive shaft gear142 towards one another when thegears126 and142 are aligned. Non-limiting examples of biasing elements include compression springs, coil springs, leaf springs, and other suitable components and/or materials.
• FIGS. 2A and 2B illustrate a non-limiting exemplary embodiment of thedevice100 having aspring160 biasing element configured for biasing at least theprime mover gear128 towards thedrive shaft gear148. When thedevice100 is not loaded and/or theprime mover carriage124 and thegear engagement assembly144 are not juxtaposed, thespring160 pushes at least theprime mover gear128 towards the location whereat thedrive shaft gear148 will be positioned when thegears128 and148 will be aligned when thedevice100 is loaded. The alignment element is configured for inhibiting or minimizing roll, pitch and yaw of thegear engagement assembly144 and theprime mover carriage124 as they are advanced towards one another when loading thedevice100. As the leading edge of thegear engagement assembly144 enters theinsertion channel150 and theprime mover gear128 and thedrive shaft gear148 advance towards each other, the ramped planar surface of the second guide154 causes the proximal section of theprime mover carriage124, and at least theprime mover gear128, to move in a direction away from the advancingdrive shaft gear148. When theprime mover carriage124 and thegear engagement assembly144 are appropriately juxtaposed, theprime mover gear128 and thedrive shaft gear148 will be aligned, and thegears128 and148 will mesh because of the biasing force from thespring160. While only onespring160 is illustrated and described with reference to theFIGS. 2A and 2B, it should be readily apparent that more than one spring can be used for providing the required functionality. Accordingly, all such alternatives are considered as being within the metes and bounds of the instant disclosure.
• In some embodiments, theprime mover carriage124 includes one or more alignment pins162 and thegear engagement assembly144 includes one or more correspondingly aligned apertures configured for receiving the one or more alignment pins162. The one or more alignment pins162 and the one or more apertures are configured and located such that when theprime mover carriage124 and thegear engagement assembly144 are properly juxtaposed, theprime mover gear128 and thedrive shaft gear148 will be aligned as required, and the one or more alignment pins162 and the corresponding aperture will engage. Accordingly, further relative displacement of theprime mover carriage124 and thegear engagement assembly144 will be inhibited and the alignment of thegears128 and148 will be maintain. Spring forces from the one or more biasing elements will mesh theprime mover gear128 and thedrive shaft gear148.
• In some embodiments, thedrive shaft cartridge104 includes a releasable locking feature that engages with a releasable locking feature on at least one of thehandle102 and theprime mover carriage124. In some embodiments, a self-releasinglocking mechanism204 is provided at or near the proximal end of the prime movingcarriage124. In the embodiment shown, the self-releasinglocking mechanism204 is positioned proximal of theprime mover gear128. In some embodiments, at least a portion of theproximal section138 of thedrive shaft cartridge104 is engaged with the self-releasinglocking mechanism204. In some embodiments, thehandle102 also has a self-releasinglocking mechanism206 withinchannel208. In certain embodiments, the one or more self-releasinglocking mechanisms204 and206 are configured for inhibiting the displacement or movement of theprime mover carriage124 while it is not connected with thedrive shaft cartridge104. When thedevice100 is “loaded” and theprime mover gear138 and thedrive shaft gear148 are meshed, the one or more self-releasinglocking mechanisms204 and206 is disengaged.
• FIG. 1B illustrates an alternate embodiment of anelongated biasing element164 that may also be used as an alignment element. The biasingelement164 includes a distal end fixedly or removably attached to or integrally formed with thedrive shaft cartridge104 at a location distal from thegear engagement assembly144. In certain embodiments, the biasingelement164 extends proximally and is configured such that in the absence of any external force, aproximal end166 thereof extends away from thegear engagement assembly144. When appropriate force is applied on at least a portion of the biasingelement164, theproximal end166 is displaced in the direction indicated by thearrow168 towards thegear engagement assembly144 and spring force is stored in thebiasing element164. Then, when the applied force is removed, the stored spring force will urge theproximal end166 away from thegear engagement assembly144 in the direction opposite that indicated by thearrow168.
• Additionally, in some embodiments, the biasingelement164 can be configured as the first section of an alignment element, and the second section of the alignment element can be disposed on at least a portion of thehandle102. The second section can be a groove or similar structure configured for slidable engagement with the biasingelement164. In some embodiments, the second element is disposed on, e.g., integrally formed with, theprime mover carriage124. Additionally, or in the alternative, at least a portion of thehandle102 distal from theprime mover carriage124 can include the second section of the alignment element. For example, the second section can be disposed on at least one or more of theopening114 in thedistal end116 of thehandle102, portions of or theentire channel112 extending proximally from theopening114, theopening118 in theintermediate section110, and at least a portion of the interior120 proximal of theopening118.
• In some embodiments, the second section of the alignment element can include an indent170 configured for removably receiving theproximal end166 of the biasingelement164 and inhibiting further displacement of thedrive shaft cartridge104 in the proximal direction within thehandle102. In particular, the displacement of thegear engagement assembly144 in the proximal direction within thehandle102 is inhibited. Accordingly, it should be readily apparent that theproximal end166 and the indent170 must have complementary configurations such that theprime mover gear128 and thedrive shaft gear148 are aligned when theproximal end166 is removably received within the indent170. For loading thedevice100, theproximal end166 and thegear engagement assembly144 are displaced towards one another and both are then inserted through theopening114 into thehandle102. Thegear engagement assembly144 and theprime mover carriage124 are displaced towards one another until theproximal end166 of the biasingelement164 is removably received within the indent170. Theprime mover gear128 and thedrive shaft gear148 will be aligned with one another, and the spring force stored within the biasingelement164 will cause thegears128 and148 to mesh.
• Some embodiments of thedevice100 can include one or more release mechanisms for separating, e.g., un-meshing, themeshed gears126 and142 so that the exchangeabledrive shaft cartridge104 can be removed from thehandle102. In other embodiments of thedevice100, one or more of thehandle102, thedrive shaft cartridge104 and the alignment element can be configured such that a displacement of thehandle102 and thedrive shaft cartridge104 away from one another will separate the juxtaposedprime mover carriage124 and thegear engagement assembly144 and also separate, e.g., un-mesh, themeshed gears126 and142.
• FIGS. 3A and 3B are partial side views of an embodiment for meshing theprime mover gear128 and thedrive shaft gear148 with one another in an embodiment of thedevice100. As described elsewhere, embodiments of the devices disclosed herein, e.g.,device100, include a handle defined at least in part by an elongated hollow intermediate section.FIG. 3A illustrates a portion of an interior302 within an embodiment of an elongated hollow intermediate section of a handle, e.g., handle102. As withinterior120, the interior302 is configured for housing and for a linear displacement of a gear engagement assembly304 and a prime mover carriage306. In several respects the embodiments of the gear engagement assembly304 and of the prime mover carriage306, respectively, are substantially similar to thegear engagement assembly144 and theprime mover carriage124 described elsewhere with reference to thedevice100. As such, the gear engagement assembly304 includes a drive shaft gear308 fixedly attached to a proximal end of a drive shaft extending distally therefrom. And, the prime mover carriage306 includes a prime mover310 having a prime mover gear312 fixedly attached to a shaft314 thereof.
• As shown, the interior302 includes a guide rail316 extending through at least a portion thereof. In some embodiments, the guide rail316 divides the interior302 into at least a first section318 and a second section320. As illustrated, the first section318 is configured for accommodating the gear engagement assembly304 and the prime mover carriage306 while the drive shaft gear308 and the prime mover gear312 are aligned with one another but are not meshed. The second section320 is configured for accommodating the gear engagement assembly304 and the prime mover carriage306 after the drive shaft gear308 and the prime mover gear312 are meshed. The guide rail316 further includes a transition section322 extending between the first and the second sections318 and320, respectively. In some embodiments, the transition section322 is configured for advancing at least the aligned drive shaft gear308 and the prime mover gear312 towards one another while the gear engagement assembly304 and the prime mover carriage306 are displaced, either singularly or in combination, from the first section318 into the second section320. As will be apparent, the transition section322 is therefore configured for meshing the aligned drive shaft gear308 and the prime mover gear312 when they are displaced from the first section318 into the second section320. In the illustrated embodiment, while the gear engagement assembly304 and the prime mover carriage306 are together displaced from the first section318 into the second section320, the transition section322 causes the prime mover carriage306 to pivot about a pivot point324 such that at least the prime mover gear312 is displaced towards, and meshed with, the drive shaft gear308. In some embodiments, reversing the displacement of the gear engagement assembly304 and the prime mover carriage306 from the second section320 into the first section318 will un-mesh the drive shaft gear308 and the prime mover gear312 from one another. The drive shaft cartridge of which the gear engagement assembly304 is a component of, can be removed from the handle and replaced with a different or another similar drive shaft cartridge having a gear engagement assembly substantially similar to the gear engagement assembly304.
• In the first section318 of the embodiment illustrated inFIG. 3A, the prime mover carriage306 is shown tilted about the pivot point324 such that the drive shaft gear308 and the prime mover gear312 are separated from, and not meshed with, one another. In some embodiments, the illustrated tilting of the prime mover carriage306 may be due to gravitational forces. Although not shown, other embodiments can include one or more biasing elements configured to tilt the prime mover carriage306 as illustrated. Non-limiting exemplary biasing elements include coiled springs, leaf springs and similar components configured to store spring forces when displace from their “normal” state. For instance, one or more coil springs, each having a compressed state as its “normal” state, may be provided whereby, in the first section318, the prime mover carriage306 is tilted as illustrated inFIG. 3A. Displacing the prime mover carriage306, with the gear engagement assembly304, into the second section320, as illustrated inFIG. 3B, will “stretch” the one or more springs and store spring forces therewithin. The subsequent displacement of the prime mover carriage306, with the gear engagement assembly304, from the second section320 into the first section318 will “release” the spring forces whereby the prime mover carriage306 will tilt as illustrated inFIG. 3A, and the drive shaft gear308 and the prime mover gear312 will un-mesh, i.e., separate from one another.
• In order to use thedevice100, thedistal section108 of thehandle102 and thedistal section140 of thedrive shaft cartridge104 need be coupled to one another such that during use, theprime mover gear128 and thedrive shaft gear148 remain meshed with one another within thehandle102. To that end, embodiments of thedevice100 may include one or more connectors and associated release mechanisms, respectively, configured for engaging and separating or disengaging thehandle102 and thedrive shaft cartridge104 from one another. As stated, such coupling needs to be releasable because it may be desirable or necessary to replace thedrive shaft cartridge104 during the procedure. Accordingly, some embodiments of the one or more connectors include complementary first and second sections that can be integrally formed, respectively, with thedistal section108 of thehandle102 and with thedistal section140 of thedrive shaft cartridge104. The first and second sections are configured for being removably coupled to each other. It will be readily apparent to one skilled in the art that the component on which the first and the second sections are formed can be reversed without affecting the required functionality. In other words, the functionality of the connector will not change if the first section is integrally formed with thedistal section140 of thedrive shaft cartridge104 and the second section integrally formed with thedistal section108 of thehandle102.
• FIGS. 1A and 1B illustrate an embodiment of a connector configured for keeping thehandle102 and thedrive shaft cartridge104 connected to one another while thedevice100 is in use. The connector includes a tabbedconnector172 integrally formed with thedistal section140 of thedrive shaft cartridge104 and one or morecomplementary holes176 integrally formed with thedistal section108 of thehandle102. The tabbedconnector172 includes one ormore tabs174, each of which removably engages with acomplementary hole176 in thedistal section108. When thedevice100 is “loaded,” i.e., thedistal sections108 and140 abut one another, the tabbedconnector172 prevents separation of thehandle102 and thedrive shaft cartridge104 while thedevice100 is in use during a procedure. For “unloading” thedevice100, i.e., separating thehandle102 and thedrive shaft cartridge104 from one another, thedistal sections108 and140 can be disengaged from one another by applying pressure to thetabs174 in the direction indicated by thearrows178, and displacing thedistal sections108 and140 away from one another.
• In some embodiments, when the exchangeabledrive shaft cartridge104 is loaded, and theprime mover gear128 and thedrive shaft gear148 are properly meshed and engaged with one another, a gap may exist between thedistal section140 of thedrive shaft cartridge104 and thedistal end116 of thehandle102. In some embodiments, the one or more connectors for removably connecting thedistal end116 of thehandle102 and thedistal section140 of thedrive shaft cartridge104 with one another can include a sealing mechanism for creating a sealed coupling therebetween.
• Alternate exemplary embodiments of one or more connectors and associated release mechanisms includes snap-fit connectors, tongue and groove connectors, rails, rotatable connectors, bayonet mounts and ribs. For instance, in a non-limiting exemplary embodiments, the sealing mechanism (i.e., the one or more connectors) can be a bayonet mount wherein a rotational displacement of thehandle102 and/or thedrive shaft cartridge104 in opposite directions, after being juxtaposed, connects or disconnects thehandle102 and thedrive shaft cartridge104 from one another.
• In some embodiments, the one or more connectors for removably connecting thehandle102 and thedrive shaft cartridge104 with one another is also configured to function as a seal. For example, the one or more connectors can also form a fluidic seal that inhibits any flow of fluid therethrough.
• Other embodiments of one or more release mechanisms as may become apparent to those having ordinary skill in the art are considered as being within the metes and bounds of the instant disclosure.
• As illustrated inFIGS. 1A-1C, thedevice100 includes a guide wire clamp or brake180 in theproximal section106 of thehandle102. Engaging the guide wire clamp or brake180 enables the user of thedevice100 to stop the insertion or retraction of aguide wire182 extending through thedevice100. When the guide wire clamp or brake180 is operated to its dis-engaged state, theguide wire182 can then be inserted or retracted.
• In some embodiments, theproximal section106 of thehandle102 includes at least onecontrol panel184 through which the user can monitor and/or control the operation of thedevice100. Some embodiments of the at least onecontrol panel184 enable the user of thedevice100 to start, stop, change and monitor the rotational speed of theprime mover126 which affects the rotational speed of thedrive shaft142. Certain embodiments of the at least onecontrol panel184 enable the user of thedevice100 to monitor and/or control the flow of saline. Some embodiments of thedevice100 may include one or more fiber optic cables extending into the vasculature of a patient. In such embodiments of thedevice100, the at least onecontrol panel184 may be configured for displaying visuals, e.g., images, of the interior of the vasculature. Certain embodiments of thedevice100 may include one or more sensors for sensing conditions such as whether or not thehandle102 and thedrive shaft cartridge104 are properly coupled as required for operating thedevice100. The one or more sensors may also include means for sensing parameters such as the environmental conditions (e.g., temperature, pressure, etc.) within the vasculature and/or the physical conditions (e.g., thickness, pliability, etc.) of the vasculature. Accordingly, some embodiments of the at least onecontrol panels184 may be configured for displaying the sensed conditions. Certain embodiments of the at least onecontrol panels184 may include at least a micro-processor, memory, display interfaces, input/output ports or interfaces, etc. All functionalities of the at least onecontrol panel184 as may become apparent to those having ordinary skill in the art are considered as being within the metes and bounds of the instant disclosure.
• As described elsewhere, certain embodiments of thedevice100 include one or more sensors for detecting whether or not thehandle102 and thedrive shaft cartridge104 are properly connected. More specifically, the one or more sensors are configured to detect whether or not thedistal end116 of thehandle102 and the proximal end of thedistal section140 are properly connected. If proper connection as required for operating thedevice100 is not detected, thedrive shaft142 may be inhibited from advancing and/or rotating. This is also applicable for embodiments wherein thedrive shaft142 is configured as a telescoping drive shaft as illustrated inFIG. 1E.
• In some embodiments of thedevice100, thedistal section140 of thedrive shaft cartridge104 includes anosecone186. In embodiments of thedevice100 wherein thedrive shaft142 is telescoping, thenosecone186 and thedrive shaft cartridge104 are configured for being removably attached to one another.FIG. 1F illustrates an embodiment wherein thenosecone186 includes aproximally extending structure188 and thedrive shaft cartridge104 includes anoutput gear hypotube190. As shown, aproximal section192 of thestructure188 and adistal section194 of thehypotube190 includecomplementary elements196 and198, respectively, configured for removably connecting thestructure188 and thehypotube190 with one another. In some embodiments, thecomplementary elements196 and198 respectively include a spring-biased tab and an indent configured for slidable engagement with one another. In certain embodiments, the spring-biased tab is configured as a leaf spring. In other embodiments, thecomplementary elements196 and198 respectively include a spring-biased ball and a depression configured for slidable engagement with one another. Of course, the configurations of thecomplementary elements196 and198 can be reversed. Furthermore, the described and illustrated embodiments are exemplary and, as such, should not be construed as being limiting. Modifications or alternate embodiments for removably connecting thenosecone186 and thehypotube190 are considered as being within the metes and bounds of the instant disclosure.
• In use, when thedrive shaft142 is in the retracted state and not telescoping, thestructure188 and thehypotube190 are connected or coupled to one another at their respective proximal anddistal sections192 and194. In some embodiments, thedevice100 must be “loaded” in order to telescope thedrive shaft142. If thedevice100 is “unloaded”, one or more locking mechanisms (not shown) inhibit thedrive shaft142 from being telescoped. When thedevice100 is “loaded”, the one or more locking mechanism(s) are disengaged, and thedrive shaft142 can be telescoped by displacing thenosecone186 and thehandle102 in opposite directions away from each other.
• In certain embodiments, thestructure188 and thehypotube190 include complementary alignment elements for aiding the insertion of theproximal section192 into thedistal section194. In the illustrated embodiment, thehypotube190 includes an outwardly flaringdistal end200, and thestructure188 includes an inwardly taperingproximal end202. The described embodiment should not be construed as being limiting. In alternate embodiments, thedistal section194 of thehypotube190 can be configured for insertion into and retraction from theproximal section192 of thestructure188.
• Certain embodiments of thedevice100 include a saline infusion port in fluid communication with a saline reservoir. The device may further include an internal saline tube configured for transporting the saline from the infusion port to an inner lumen of a catheter. As such, the saline from the reservoir may be used for reducing friction between therotating drive shaft142 and any non-rotating components disposed within and/or around thedrive shaft142. The saline from the reservoir may also be used as a heat transfer fluid.
• FIG. 4A is a perspective view of adistal section402 in an embodiment of an exchangeable drive shaft cartridge for another embodiment of a rotational atherectomy device. Thedistal section402 includes atubular section404 having atrough406 extending proximally therefrom, and atubular nosecone408 extending distally therefrom. The tube of thetubular section404 is contiguous at its first open end with thetrough406, and is contiguous at its second open end, opposite the first open end, with a first open end of the tube of thenosecone408. A second open end, opposite the first open end, of the tube of thenosecone408 defines theopening146 in adistal end410 of thedistal section402. As such, thedistal section402 is configured for passage therethrough of thedrive shaft142 fixedly attached at its proximal end to thedrive shaft gear148 and having a distal end configured for insertion into a vasculature of a patient. While thedistal section402 is illustrated as having a generally circular cross-section throughout, the geometrical shape should not be considered as a requirement and/or limiting. Alternate shapes extending the entiredistal section402 and/or on portions thereof are considered as being within the metes and bounds of the instant disclosure.
• FIG. 4B is a cross-section view of thetrough406 along a plane extending through the sectional line B-B shown inFIG. 4A. In the illustrated embodiment, thetrough406 has a generally U-shaped geometry having achannel412 defined at least in part by opposingwalls414 and416. However, this specific geometrical shape for thetrough406 should be considered as a requirement and/or limiting. Alternate configurations as may become apparent to those having ordinary skill in the art are considered as being within the metes and bounds of the instant disclosure.
• Thedistal section402 is illustrated having alongitudinally extending fin418 on at least a portion thereof. InFIG. 4A, thefin418 is illustrated as extending along the entire length of thetubular section404 and thetrough406. However, the longitudinal extent of the fine418 and/or its location on the external surface of thedistal section402 should not be considered as a requirement and/or limiting. In some embodiments, thefin418 extends along only portions of thetubular section404 and/or thetrough406. In certain embodiments, thefin418, and/or portions thereof, are positioned at one or more locations on the external surface of thedistal section402. All alternative shapes, sizes, locations, etc., for thefin418, as may become apparent to those having ordinary skill in the art are considered as being within the metes and bounds of the instant disclosure.
• With reference toFIGS. 4A and 1B, it should be apparent that the respectivedistal sections402 and140 of the drive shaft cartridges are substantially different from one another. Accordingly, the distal sections of the handles through which the drive shaft cartridges having thedistal sections402 and140 are inserted for removable coupling with the handle also need to be different from one another.FIG. 4C is a perspective view of an embodiment of ahandle420 having adistal section422 different from thedistal section108 of thehandle102 illustrated inFIG. 1B. In several other aspects, thehandles420 and102 are substantially similar to one another. A top view of at least a portion of thedistal section422 proximate adistal end424 of thehandle420 is illustrated inFIG. 4D.
• In general, the cross-section of thedistal section422 of thehandle420 through which the drive shaft cartridge is inserted and the cross-section of at least thetubular section404 of thedistal section402 are complementary and/or substantially similar. As illustrated inFIG. 4D, thedistal section422 includes achannel426 defined at least in part by opposing guard rails orwalls428 and430. Thechannel426 and the opposingguard rails428 and430 extend proximally from anopening432 in thedistal end424, and are configured for slidable coupling with at least thefin418, thetubular section404 and thetrough406 of thedistal section402 of the drive shaft cartridge. In some embodiments, thechannel426 and the opposingguard rails428 and430 are configured for aligning thedistal sections402 and422 with one another.
• In some embodiments, thedistal end424 and at least a portion of thedistal section422 proximal thereof is configured for removably connecting with at least a portion of thenosecone408 of thedistal section402. In certain embodiments, the device includes at least one connector having complementary first andsecond sections434 and436, respectively, disposed on thenosecone408 and thedistal section422, and configured for connecting and dis-connecting thenosecone408 and thedistal section422.
• For “loading” the device, thegear engagement assembly144 is inserted through theopening432 into the handle and is removably connected with theprime mover carriage124 housed within the interior120 in theintermediate section110 of thehandle420. As described elsewhere, theprime mover gear128 and thedrive shaft gear148 will mesh when theprime mover carriage124 and thegear engagement assembly144 are connected with one another. Next, as indicated by thedirectional arrow438, thetrough406 and thetubular section404 of thedistal section402 are inserted into thedistal section422 of thehandle420 through theopening432. Thedistal section402 and at least thedistal section422 of thehandle420 are displaced in opposite directions towards each other until the first andsecond sections434 and436 of the connector engage one another. In the illustrated embodiment, to “unload” the device, for example to change or replace the drive shaft cartridge, thedistal section402 and at least thedistal section422 of thehandle420 are displaced in opposite directions away from each other while concurrently pushing or pressing at least thefirst section434 of the connector in the direction indicated by thearrow440. Concurrently, or subsequently, thegear engagement assembly144 and theprime mover carriage124 are disconnected and thegear engagement assembly144 is removed from thehandle420 through theopening432.
• FIG. 5 is a perspective view of another embodiment of arotational atherectomy device500 in a dis-assembled state. Elements and components of thedevice500 that are substantially similar or the same as those in other embodiments of the device are identified with the same reference numerals. Thedevice500 includes ahandle502 and an exchangeabledrive shaft cartridge504, wherein thehandle502 and thedrive shaft cartridge504 include one or more connectors configured for removably connecting thehandle502 and thedrive shaft cartridge504 to one another.
• Some embodiments of thehandle502 include aproximal section106, adistal section508, and an elongatedintermediate section510. Thedistal section508 includes achannel512 extending proximally from anopening514 in adistal end516 of thehandle502. Certain embodiments of theintermediate section510 include atrough518 extending between the proximal anddistal sections106 and508, respectively, of thehandle502. Thetrough518 is configured for housing and longitudinal displacement of aprime mover carriage520 disposed therewithin. Theprime mover carriage520 includes aprime mover522 and aprime mover gear524 fixedly attached to a shaft of theprime mover522.
• Certain embodiments of thedrive shaft cartridge504 include aproximal section526, adistal section528, and anintermediate section530 having aslot532 extending longitudinally between the proximal anddistal sections526 and528, respectively. The drive shaft cartridge further includes at least onecontrol knob534 having at least a portion thereof extending through theslot532 and operationally coupled to agear engagement assembly536. Operationally and functionally, thecontrol knob534 is substantially similar to thecontrol knob132 of thedevice100. In particular, longitudinal displacement of thecontrol knob534 along theslot532 will induce a similar longitudinal displacement of thegear engagement assembly536. As with thecontrol knob132, thecontrol knob534 can be operated between locked and unlocked states. Thegear engagement assembly536 includes adrive shaft gear538 fixedly attached to a proximal end of a drive shaft extending distally therefrom and through an opening in thedistal section528 of thedrive shaft cartridge504.
• In order to use thedevice500, thehandle502 and the exchangeabledrive shaft cartridge504 may be removably connected to each other as follows. Thecontrol knob534 is used for proximally displacing thegear engagement assembly536 and positioning it proximate to and/or within theproximal section526 of thedrive shaft cartridge504. In some embodiments, such as that illustrated inFIG. 5, thegear engagement assembly536 may be positioned such that a portion thereof and/or thedrive shaft gear538 extends proximally beyond theproximal end544. Also as illustrated, theprime mover carriage520 is located proximate adistal end546 of thetrough518. Theprime mover gear524 and thedrive shaft gear538 are aligned and then meshed by juxtaposing theprime mover carriage520 and thegear engagement assembly536. Concurrently, thehandle502 and thedrive shaft cartridge504 are displaced towards one another until theproximal end544 of the proximal section526 (i.e., the drive shaft cartridge504) and thedistal end542 of theproximal section506 are removably coupled. Some embodiments of thedevice500 may include complementary sections of one or more alignment elements for assisting with and/or maintaining the alignment of theprime mover gear524 and thedrive shaft gear538. Non-limiting exemplary embodiments of the one or more alignment elements include tongue-and-groove, rails, channels and ribs. Certain embodiments of thedevice500 may include complementary sections of one or more connectors for removably coupling theprime mover carriage520 and thegear engagement assembly536. Non-limiting exemplary embodiments of the one or more connector include tabbed connectors and snap-fit connectors.
• Embodiments of thedevice500 include one or more connectors having complementary first and second sections configured for removably coupling (or connecting) thehandle502 and thedrive shaft cartridge504 to each other. Some embodiments of the connector include one or moreslidable tabs540 integrally formed with theproximal section506 of thehandle502 and complementary tab receptors (not shown) integrally formed with aproximal section526 of thedrive shaft cartridge504. WhileFIG. 5 illustrates only oneslidable tab540 at adistal end542 of theproximal section506, this should not be construed as being limiting. It should be realized that most embodiments of thedevice500 will include one or more additional slidable tabs integrally formed with theproximal section506 at thedistal end542 thereof. For example, theproximal section506 may include a slidable tab on the side or wall opposite the side or wall on which theslidable tab540 is illustratively disposed. Additionally, or in the alternative, thedistal end542 of theproximal section506 may include a slidable tab integrally formed on the same side or wall on which thecontrol panel184 is illustratively disposed. Although not shown inFIG. 5, it should be readily apparent that for each of the one or moreslidable tabs540, thedrive shaft cartridge504 will include a complementary tab receptor integrally formed with theproximal section526 at aproximal end544 thereof. Of course, it is neither necessary nor a requirement that the one or more connectors include complementaryslidable tabs540 and tab receptors. Alternative configurations of the one or more connectors as may become apparent to those having ordinary skill in the art are considered as being within the metes and bounds of the instant disclosure. For example, the one or more connectors may include snap-fit connectors and tongue and groove connectors.
• Some embodiments of thedevice500 may include one or more alternative and/or additional connectors having first and second sections configured for removably coupling (or connecting) thehandle502 and thedrive shaft cartridge504 to each other. Thehandle502 may be considered as a lower section of thedevice500, and thedrive shaft cartridge504 may be considered as an upper section of thedevice500. For example, the embodiment of thedevice500 illustrated inFIG. 5 includes afirst section546 integrally formed with thedistal section508 of thehandle502, and a complementary second section (not shown) integrally formed with thedistal section528 of thedrive shaft cartridge504. The first and second sections of such connectors are configured for removably coupling at least thedistal sections508 and528, respectively, of thehandle502 and thedrive shaft cartridge504. In some embodiments, such as that illustrated inFIG. 5, thehandle502 and thedrive shaft cartridge504 are displaced towards one another as indicated by thedirectional arrow548, and are thereafter removably coupled by displaced thedistal sections508 and528 towards one another as indicated by thedirectional arrow550. In some embodiments, the connector at the distal section of the device500 (i.e., in thedistal sections508 and528) may be further configured as an alignment element such as a tongue-and-groove connector for slidable coupling with or without snap connectors or tab connectors. In certain embodiments, thedevice500 may include additional and/or alternative alignment elements and/or connectors, each having complementary first and second sections integrally formed with the longitudinally extending opposing side edges of thehandle502 and thedrive shaft cartridge504. For example, the first sections may be integrally formed with the opposing side edges552 and554 of thehandle502, with the complementary second sections, respectively, integrally formed with the opposingside edge556 and the side edge not shown of thedrive shaft cartridge504. All alternative configurations for the one or more connectors and/or the one or more alignment elements as may become apparent to those having ordinary skill in the art are considered as being within the metes and bounds of the instant disclosure.
• FIG. 6 is a perspective view of yet another embodiment of arotational atherectomy device600 in a dis-assembled state. Elements and components of thedevice600 that are substantially similar or the same as those in other embodiments of the device are identified with the same reference numerals.Device600 includes ahandle602 and an exchangeabledrive shaft cartridge604, wherein thehandle602 and thedrive shaft cartridge604 include one or more connectors configured for removably connecting thehandle602 and thedrive shaft cartridge604 to one another. Thehandle602 includes aproximal section106, adistal section606, and an elongated hollowintermediate section110 extending between the proximal anddistal sections106 and606, respectively. Theintermediate section110 includes theopening118 between the interior120 thereof and atrough608 in thedistal section606 configured for receiving thegear engagement assembly144. Thedrive shaft cartridge604 includes adistal section610 having an opening in adistal end612 thereof configured for passage therethrough of thedrive shaft142 extending distally from thegear engagement assembly144.
• Thehandle602 and thedrive shaft cartridge604 are removably connected by first inserting thegear engagement assembly144 through theopening118 into theinterior120 of theintermediate section110. Thegear engagement assembly144 and theprime mover carriage124 within the interior120 are removably coupled as described elsewhere with reference todevice100. Then thehandle602 and thedrive shaft cartridge604 are removably connected by juxtaposing thedistal sections606 and610, and displacing thehandle602 and thedrive shaft cartridge604 towards one another.
• InFIG. 6, thedevice600 is illustrated having a first and a second connector, each having complementary first and section sections configured for removably connecting thehandle602 and thedrive shaft cartridge604. The first section of the first connector is shown as opposinghooks614 and616 integrally formed with respective opposing side walls and/oredges618 and620 of thedistal section606. The complementary second section of the first connector includes hook receptors (not shown) for thehooks614 and616 are integrally formed with the opposing side walls and/or edges, e.g., wall/edge622, of thedistal section610. The hook receptors are configured for removably receiving thehooks614 and616. When the juxtaposedhandle602 and thedrive shaft cartridge604 are displaced towards one another, thehooks614 and616 are slidably and removably received in the hook receptors in thedistal section610.
• The second connector for removably connecting thehandle602 and the drive shaft cartridge is a tabbed connector. The first section of the tabbed connector is shown as atab624 integrally formed with thedistal section610 at a proximal end (or edge or wall)626 thereof. The complementary second section of the second connector is shown as a tab receptor628 integrally formed with thehandle602 at a distal end (or edge or wall)630 of theintermediate section110. The tab receptor628 is configured for slidably and removably receiving at least a portion of thetab624. When the juxtaposedhandle602 and thedrive shaft cartridge604 are displaced towards one another, thetab624 is slidably and removably received by the tab receptor on thehandle602.
• In some embodiments, thedevice600 includes one or more alignment elements having complementary first and second sections configured for aligning thedistal sections606 and610 with one another in preparation for or while removably connecting thehandle602 and thedrive shaft cartridge604 with one another. In certain embodiments, the one or more alignment elements are configured as tongue-and-groove elements integrally formed with side edges of thedistal sections606 and610.
• In some embodiments, the first and the second connectors operate concurrently for removably connecting thehandle602 and thedrive shaft cartridge604. In certain embodiments, one of the first and the second connectors operates before the other. Additionally or in the alternative, one or both of the first and the second connectors may be configured as a first and a second alignment element for aligning thedistal sections606 and610, respectively, of thehandle602 and thedrive shaft cartridge604.
• For replacing or exchanging an installeddrive shaft cartridge604 with another, the first and the second connector are operated to disengage their respective first and second sections, and thehandle602 and thedrive shaft cartridge604 are displaced away from one another Thegear engagement assembly144 is then removed from theintermediate section110 through theopening118. Some embodiments of thedevice600 include a support632 for holding thegear engagement assembly144 proximate theopening118 and aligning them prior to inserting thegear engagement assembly144 into theinterior120 of theintermediate section110 through theopening118. The support632 can also be used for holding thegear engagement assembly144 when it is removed from theinterior120 of theintermediate section110 through theopening118. The support632 may also be configured for protecting at least a portion of thegear engagement assembly144, including thedrive shaft gear148, while thehandle602 and thedrive shaft cartridge604 are not connected.
• While specific configurations have been described with reference to the first and the second connector and with reference to the one or more alignment elements, additional and/or alternative embodiments will become apparent to those having ordinary skill in the art. All such additional and/or alternative embodiments configured for providing the same or substantially similar functionalities are considered as being within the metes and bounds of the instant disclosure.
• FIG. 7A is a perspective view of an embodiment of arotational atherectomy device700 in a dis-assembled state. Elements and components of thedevice700 that are substantially similar or the same as those in other embodiments of the device are identified with the same reference numerals.Device700 includes ahandle702 and an exchangeabledrive shaft cartridge704, wherein thehandle702 and thedrive shaft cartridge704 include one or more connectors configured for removably connecting thehandle702 and thedrive shaft cartridge704 to one another. Thehandle702 includes theproximal section106, adistal section706, and an elongated hollowintermediate section708 extending between the proximal anddistal sections106 and706, respectively. Theintermediate section708 includes adoor710 operable for accessing theinterior120 thereof, and theopening118 between the interior120 and the trough orchannel112 in thedistal section706. Thedrive shaft cartridge704 includes thedrive shaft142 extending distally from thegear engagement assembly144, and adistal section712 having an opening at a distal end thereof through which thedrive shaft142 extends. Although not shown, and as with other embodiments of the device, thedevice700 includes one or more connectors each having complementary first and second section configured for removably connecting thedistal sections706 and712 to one another. As with other embodiments of the device, thedevice700 can include one or more alignment elements.
• FIG. 7B is a detailed side view illustrating a pivotingconnector714 configured for removably and pivotably coupling theprime mover carriage124 and thegear engagement assembly144 to one another. The pivotingconnector714 is further configured for aligning and meshing theprime mover gear128 and thedrive shaft gear148. The pivotingconnector714 includes a pivot point oraxis716 and complementary first and second sections integrally formed with theprime mover carriage124 and thegear engagement assembly144. Theprime mover carriage124 and thegear engagement assembly144 are pivotably and removably connected at their respective first and second sections.
• For “loading” thedevice700, theinterior120 of theintermediate section708 is exposed by opening thedoor710. Theprime mover carriage124 and thegear engagement assembly144 are pivotably and removably coupled at the pivot point oraxis716 of the pivotingconnector714 such that theprime mover gear138 and thedrive shaft gear148 are aligned. Next, thedistal sections706 and712 are juxtaposed by displacing them towards each other by rotating thehandle702 and thedrive shaft cartridge704 about the pivot point oraxis716. Theprime mover gear138 and thedrive shaft gear148 will be meshed when thedistal sections706 and712 are removably connected. Thereafter, thedoor710 is closed, and thedevice700 is ready for use. For “unloading” thedevice700, the process for “loading” thedevice700 is performed in reverse.
• FIG. 8 is a side view of another embodiment of arotational atherectomy device800 in a partially dis-assembled state. Elements and components of thedevice800 that are substantially similar or the same as those in other embodiments of the device are identified with the same reference numerals.Device800 includes ahandle802 and an exchangeabledrive shaft cartridge804 configured for being removably connected. In some embodiments, thedevice800 includes a first connector and a second connector, each having complementary first and second sections configured for removably connecting thehandle802 and thedrive shaft cartridge804 to each other.
• InFIG. 8, the first connector is illustrated as a pivoting connector having a first section integrally formed with adistal section806 of thehandle802, and a second section integrally formed with anintermediate section808 of thedrive shaft cartridge804. The second connector is illustrated as a tabbed connector wherein the first section is aslidable tab810 integrally formed with an elongated hollowintermediate section812 of thehandle802, and wherein the second section is a tab receptor (not shown) integrally formed with aproximal section814 of thedrive shaft cartridge804. The illustrated locations of the first and the second connectors are primarily for the purpose of describing thedevice800. Of course, the complementary first and second sections, respectively, of the first and the second connector can be formed elsewhere on thehandle802 and thedrive shaft cartridge804 subject to providing the required functionality, including ensuring that theprime mover gear128 and thedrive shaft gear148 will be aligned for proper meshing when thehandle802 and thedrive shaft cartridge804 are removably connected.
• For “loading” thedevice800, the first and second sections of the first connector are used for pivotably and removably connecting thedistal section806 of thehandle802 and theintermediate section808 of thedrive shaft cartridge804 with one another. Next, theintermediate section812 of thehandle802 and theproximal section814 of thedrive shaft cartridge804 are juxtaposed by displacing them towards each other by rotating thehandle802 and thedrive shaft cartridge804 about a pivot point oraxis816 of the pivotable first connector. Then, theprime mover carriage124 and thegear engagement assembly144 are positioned such that theprime mover gear128 and thedrive shaft gear148 are aligned. Thereafter, the first and second sections of the second connector will operate, automatically or manually, to removably connect theintermediate section812 and theproximal section814 to one another. And, theprime mover gear128 and thedrive shaft gear148 will be meshed. The second connector can also be operated to dis-connect theintermediate section812 of thehandle802 and theproximal section814 of thedrive shaft cartridge804 from one another.
• Some embodiments of thedevice800 include a third connector having complementary first and second sections for removably connecting thehandle802 and thedrive shaft cartridge804 to one another at locations in addition to or alternatively to the first and the second connectors.FIG. 8 illustrates a third connector for an additional removable connection between thehandle802 and thedrive shaft cartridge804. In some embodiments, the third connector is configured as a tabbed connector having afirst section818 integrally formed with theintermediate section812 of thehandle802, and the second section integrally formed with theintermediate section808 of thedrive shaft cartridge804. The third connector can be configured for operating automatically or by a user of thedevice800 after or concurrently with the second connector.
• For “unloading” thedevice800, the process for “loading” thedevice800 is performed in reverse. As with other embodiments of the device, thedevice800 can include one or more alignment elements.
• FIG. 9 is a side view of yet another embodiment of arotational atherectomy device900 in a partially dis-assembled state Elements and components of thedevice900 that are substantially similar or the same as those in other embodiments of the device are identified with the same reference numerals. With reference toFIGS. 8 and 9, it should be apparent that the respective illustrateddevices800 and900 are substantially similar to each other. One difference between thedevices800 and900 is that locations of the first and the second connectors are swapped. Specifically, the first connector, configured as a pivoting connector, pivotably and removably connects an elongated hollowintermediate section902 of ahandle904 to aproximal section906 of an exchangeabledrive shaft cartridge908. And, the second connector, configured as a tabbed connector, removably connects adistal section910 of thehandle904 and anintermediate section912 of thedrive shaft cartridge908 to one another.
• For “loading” thedevice900, the first and second sections of the first connector are used for pivotably and removably connecting theintermediate section902 of thehandle904 and theproximal section906 of thedrive shaft cartridge908 to one another. Next, theprime mover carriage124 and thegear engagement assembly144 are position such that theprime mover gear128 and thedrive shaft gear148 are aligned. Then, thedistal section910 of thehandle904 and theintermediate section912 of thedrive shaft cartridge908 are juxtaposed by displacing them towards each other by rotating thehandle904 and thedrive shaft cartridge908 about a pivot point oraxis914 of the pivotable first connector. Thereafter, the first and second sections of the second connector will operate, automatically or manually, to removably connect thedistal section910 of thehandle904 and theintermediate section912 of thedrive shaft cartridge904 to one another. And, theprime mover gear128 and thedrive shaft gear148 will be meshed. The second connector can also be operated to dis-connect thedistal section910 of thehandle904 and theintermediate section912 of thedrive shaft cartridge904 from one another. As withdevice800, thedevice900 can also include a substantially similar third connector.
• For “unloading” thedevice900, the process for “loading” thedevice900 is performed in reverse. As with other embodiments of the device, thedevice900 can include one or more alignment elements.
• FIG. 10 illustrates an embodiment of asystem1000 configured for identifying, monitoring, and controlling the operation of a plurality of devices and components used for performing atherectomy. In some embodiments, at least a portion of thesystem1000 is configured for wireless orcontact-less communications1002 between two or more devices and components used for performing atherectomy. In certain non-limiting exemplary embodiments, the mode ofcommunications1002 includes one or more of radio frequency (RF) and infra-red (IR), among others. In some embodiments, thesystem1000 includes one or more wireless or contact-less identification tags, e.g., NFC/RFID tag,1004 disposed on one or more devices and components of a rotational or orbital atherectomy device. In a non-limiting exemplary embodiments, the one ormore identification tags1004 provide a contact-less means for identifying different shafts/crowns oraccessories1006 attached to a rotational or orbital atherectomy device (OAD)1008. The identifying information would allow themain control board1010 to vary its operational parameters as needed to properly control or interface with theattachment1006. In certain embodiments, the one or more identification tags can be disposed on one or more devices and/or components used with the OAD.
• In a non-limiting exemplary embodiment, the one ormore identification tags1004 can be disposed on a removable portion of the OAD and, when attached to the main body of the device, an NFC/RFID reader1012 would identify theattachment1006 and obtain its operational parameters. Thereader1012 then communicates1014 this information to thecontrol board1010. In some embodiments, the one ormore identification tags1004 are configured for storing data that can be used for analysis. In certain embodiments, device and/or component usage statistics such as, total run time, time spent at various speeds, etc., can be used for generating a snapshot of the atherectomy procedure.
• In some embodiments, the one ormore identification tags1004 can be used as a safety mechanism such as not allowing the OAD to operate if a required attachment is not connected. In certain embodiments, the one or more identification tags can be used for inventory management and trackingdata1016 that can be collected in the field and transmitted to a remote center, e.g., remote servers,1018. In a non-limiting exemplary embodiment, WiFi and/or cellular networks can be used for the transmission using asmartphone1020 after collecting the data from thetag1004.
• In certain embodiments, the one or more identification tags are configured for harvesting energy for providing energy or power for operating the one or more components and devices of thesystem1000. Some non-limiting exemplary embodiments for harvesting energy include harvesting RF energy.
• The descriptions of the embodiments and their applications as set forth herein should be construed as illustrative, and are not intended to limit the scope of the disclosure. Features of various embodiments may be combined with other embodiments and/or features thereof within the metes and bounds of the disclosure. Upon study of this disclosure, variations and modifications of the embodiments disclosed herein are possible, and practical alternatives to and equivalents of the various elements of the embodiments will be understood by and become apparent to those of ordinary skill in the art. Such variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention. Therefore, all alternatives, variations, modifications, etc., as may become to one of ordinary skill in the art are considered as being within the metes and bounds of the instant disclosure.

Claims (20)

What is claimed is:

1. A device, comprising:

a handle, comprising:

a proximal section;

a distal section comprising a channel extending proximally from an opening in a distal end of the handle; and

an elongated intermediate section comprising a trough extending between the proximal and the distal sections;

a prime mover carriage comprising a prime mover, the prime mover carriage disposed within the trough of the intermediate section;

a prime mover gear fixedly attached to a shaft of the prime mover;

an exchangeable drive shaft cartridge, comprising:

a proximal section and a distal section;

a slot in an intermediate section extending between the proximal and the distal sections;

a drive shaft comprising a proximal end and a distal end, the drive shaft extending through an opening in the distal section of the drive shaft cartridge;

a gear engagement assembly comprising a drive shaft gear fixedly attached to the proximal end of the drive shaft; and

a control knob having at least a portion thereof extending through the slot and operationally coupled to the gear engagement assembly such that a longitudinal displacement of the control knob induces a longitudinal displacement of the gear engagement assembly, the control knob comprising:

an unlocked state for permitting the longitudinal displacement of the control knob; and

a locked state for inhibiting the longitudinal displacement of the control knob; and

one or more connectors for removably connecting the handle and the drive shaft cartridge to one another, wherein each of the one or more connectors comprises

complementary first and second sections, wherein

the first section is integrally formed with the handle; and

the second section is integrally formed with the drive shaft cartridge;

wherein, the handle and the drive shaft cartridge are removably connected by:

removably meshing the prime mover gear and the drive shaft gear by juxtaposing the prime mover carriage and the gear engagement assembly; and

concurrently displacing the handle and the drive shaft cartridge in opposite directions.

2. The device ofclaim 1, wherein the one or more connectors are selected from the group consisting of snap-fit connectors, tongue and groove connectors, rails, bayonet mount, and ribs.

3. The device ofclaim 1, wherein the channel in the distal section of the handle and the opening in the distal end of the handle are configured for passage therethrough of at least the drive shaft.

4. The device ofclaim 1, wherein the proximal section of the handle comprises one of a guide wire clamp and a guide wire brake mechanism.

5. The device ofclaim 1, wherein the intermediate section of the handle is configured for:

longitudinal displacement of the prime mover carriage disposed within the trough thereof;

longitudinal displacement of the gear engagement assembly; and

longitudinal displacement of at least a portion of the drive shaft.

6. The device ofclaim 1, wherein the gear engagement assembly is disposed within a trough in the intermediate section of the drive shaft cartridge, the trough configured for longitudinal displacement of the gear engagement assembly.

7. The device ofclaim 6, wherein the intermediate sections of the handle and the drive shaft cartridge form an elongated hollow intermediate section of the device when the handle and the drive shaft cartridge are removably connected.

8. The device ofclaim 1, wherein the longitudinal displacement of the gear engagement assembly induces a longitudinal displacement of the prime mover carriage and of the drive shaft extending from the gear engagement assembly when the handle and the drive shaft cartridge are removably connected.

9. The device ofclaim 1, wherein at least a portion of the drive shaft is telescoping.

10. The device ofclaim 1, wherein the prime mover is selected from the group consisting of a turbine and an electric motor.

11. The device ofclaim 1, comprising one or more sensors for monitoring a rotational speed of at least one of the prime mover shaft and the drive shaft.

12. The device ofclaim 1, comprising at least one alignment element configured for aligning at least the prime mover carriage and the gear engagement assembly with one another, the at least one alignment element comprising complementary first and second sections, wherein

the first section is integrally formed with the prime mover carriage; and

the second section is integrally formed with the gear engagement assembly.

13. The device ofclaim 12, wherein the at least one alignment element is further configured as a connector for removably connecting at least the prime mover carriage and the gear engagement assembly to one another.

14. The device ofclaim 12, wherein the at least one alignment element is configured for aligning at least the prime mover gear and the drive shaft gear with one another.

15. The device ofclaim 1, comprising at least one alignment element configured for aligning at least the handle and the drive shaft cartridge with one another, the at least one alignment element comprising complementary first and second sections, wherein the first section is integrally formed with the handle; and

the second section is integrally formed with the drive shaft cartridge.

16. The device ofclaim 1, comprising:

a lumen having the drive shaft disposed therewithin;

a fluid infusion port in fluid communication with the lumen; and

a fluid reservoir in fluid communication with the fluid infusion port;

wherein, the fluid infusion port is configured for delivering fluid from the fluid reservoir to the lumen.

17. The device ofclaim 1, wherein the distal end of the drive shaft is configured for insertion into a vasculature.

18. The device ofclaim 17, comprising an abrasive element proximate the distal end of the drive shaft.

19. The device ofclaim 1, comprising at least one disconnect mechanism for disconnecting the removably connected handle and the drive shaft cartridge.

20. The device ofclaim 19, wherein a different drive shaft cartridge is removably connected with the handle.

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