US20070021775A1 - Articulating guidewire for embolic protection and methods of use - Google Patents
Articulating guidewire for embolic protection and methods of useDownload PDFInfo
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- US20070021775A1 US20070021775A1US11/466,758US46675806AUS2007021775A1US 20070021775 A1US20070021775 A1US 20070021775A1US 46675806 AUS46675806 AUS 46675806AUS 2007021775 A1US2007021775 A1US 2007021775A1
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- Prior art keywords
- guidewire
- core wire
- disposed
- locking mechanism
- outer diameter
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- 239000004793PolystyreneSubstances0.000description1
- 239000000853adhesiveSubstances0.000description1
- 230000001070adhesive effectEffects0.000description1
- 238000002399angioplastyMethods0.000description1
- 238000010276constructionMethods0.000description1
- 238000004519manufacturing processMethods0.000description1
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- 229910000679solderInorganic materials0.000description1
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Images
Classifications
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09175—Guide wires having specific characteristics at the distal tip
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M25/09016—Guide wires with mandrils
- A61M25/09025—Guide wires with mandrils with sliding mandrils
Definitions
- the present inventionrelates generally to the field of intravascular guidewires. More particularly, the present invention pertains to intravascular guidewires having an articulating distal section.
- a flexible guidewireis inserted into a vascular lumen through a guide catheter, and then advanced to a desired location within the body.
- an intravascular devicesuch as an embolic filter can be advanced along the guidewire distal a lesion and deployed to prevent embolic debris from flowing downstream during, for example, an angioplasty or atherectomy procedure.
- a radially flexible guidewirecapable of traversing the cavities of the body by applying a force on a proximal section of the guidewire. It is also desireable for the distal section of the guidewire to have a reduced profile capable of placement beyond a lesion or other protrusion in the vasculature with minimal interference.
- One such series of improvementshas resulted in the use of a thin, flexible guidewire having a distally tapering cross-sectional area for improved steering, and a coiled wire helix disposed about an arcuate distal end of the guidewire for improved tracking.
- the present inventionrelates generally to the field of intravascular guidewires. More particularly, the present invention pertains to intravascular guidewires having an articulating distal section.
- a guidewire having an articulating distal sectionis comprised of an elongated core wire having a longitudinal axis, a proximal end and a distal end; and an actuatable tip disposed about the distal end of the core wire having an outwardly expandable portion adapted to have a reduced profile in a first position, and an enlarged profile in a second position.
- the expandable portion of the actuatable tipmay comprise a plurality of openings circumferentially disposed about the length of a tubular member.
- the outer diameter of the tubular membermay be adapted to permit an intravascular device such as a cartridge filter to slide thereon.
- a guidewire having an articulating distal sectionincludes an elongated core wire having a longitudinal axis, a proximal end and a distal end; an actuator moveable about the core wire; and an actuatable tip adapted to have a reduced profile in a first position, and an enlarged profile in a second position.
- the actuatable tipmay include a spring coil helically disposed about the core wire.
- the actuatable tipmay include a mesh sleeve adapted to outwardly expand when compressed axially.
- the actuatable tipmay include an accordion-shaped polymeric tube similarly adapted to outwardly expand when compressed axially.
- the distal section of an articulating guidewireincludes a friction fit between the core wire and the actuatable tip which can be utilized to prevent the distal section of the guidewire from reverting to the first position, once articulated.
- a locking mechanismsuch as a locking hub can be utilized to prevent the distal section of the guidewire from reverting to the first position, once articulated.
- FIG. 1is a plan view of an articulating guidewire in accordance with a first embodiment of the present invention.
- FIG. 2is a cross-sectional view of the distal section of the guidewire in FIG. 1 showing the guidewire in a first position having a reduced profile.
- FIG. 3is another cross-sectional view of the distal section of the guidewire in FIG. 1 showing the guidewire in a second position having an enlarged profile.
- FIG. 4is cross-sectional view of a particular implementation of the present invention employing a locking mechanism on the distal section of the guidewire.
- FIG. 5is a cross-sectional view of the distal section of an articulating guidewire in accordance with a second embodiment of the present invention, wherein the guidewire is shown in a first position having a reduced profile.
- FIG. 6is another cross-sectional view of the guidewire in FIG. 5 showing the distal section of the guidewire in a second position having an enlarged profile.
- FIG. 7is a cross-sectional view of the distal section of an articulating guidewire in accordance with a third embodiment of the present invention, wherein the guidewire is shown in a first position having a reduced profile.
- FIG. 8is a plan view of the guidewire in FIG. 7 showing a plurality of openings circumferentially disposed about a distal section of the guidewire.
- FIG. 9is another cross-sectional view of the guidewire in FIG. 7 showing the distal section of the guidewire in a second position having an enlarged profile.
- FIG. 10is a cross-sectional view of a distal section of an articulating guidewire in accordance with a fourth embodiment of the present invention, wherein the guidewire is shown in a first position having a reduced profile.
- FIG. 11is another cross-sectional view of the guidewire in FIG. 10 showing the distal section of the guidewire in a second position having an enlarged profile.
- FIG. 12is a cross-sectional view of a distal section of an articulating guidewire in accordance with a fifth embodiment of the present invention, wherein the guidewire is shown in a first position having a reduced profile.
- FIG. 13is another cross-sectional view of the guidewire in FIG. 12 showing the distal section of the guidewire in a second position having an enlarged profile.
- FIG. 1is a plan view of an articulating guidewire 30 in accordance with a first embodiment of the present invention.
- Guidewire 30includes an elongated core wire 10 having a relatively stiff proximal section 12 , and relatively flexible distal section 14 .
- core wire 10has a relatively large profile on proximal section 12 which tapers to a smaller profile from point 16 to point 18 , and again at point 20 to point 22 .
- Core wire 10may have any number of tapering sections disposed thereon without deviating from the scope of the invention. In one implementation of the present invention (not shown), core wire 10 may continuously taper from proximal section 12 to distal section 14 .
- Wire tip 32Disposed on distal section 14 of core wire 10 is a wire tip 32 .
- Wire tip 32has a rounded distal end 34 , and is generally circular in cross-sectional area.
- Wire tip 32can be atraumatic for reduced tissue damage during advancement of the guidewire.
- wire tip 32can be comprised of a substantially hard material.
- guidewire 30also includes a tubular member 26 and a spring coil 24 , both moveable about distal section 14 of core wire 10 .
- Tubular member 26may have a length substantially similar to the length of core wire 10 .
- tubular member 26may have a length substantially shorter than the length of core wire 10 .
- the outer diameter of tubular member 26is adapted to permit an intravascular device such as an embolic protection filter to slide thereon.
- spring coil 24is adapted to have a reduced profile in a first position, and an enlarged profile in a second position.
- spring coil 24In the first (i.e. reduced profile) position, spring coil 24 has an outer diameter which is substantially similar to the outer diameter of tubular member 26 , facilitating placement of guidewire 30 beyond a lesion or other protrusion within the vasculature with minimal interference.
- spring coil 24In the second (i.e. enlarged profile) position, spring coil 24 has an outer diameter greater than the outer diameter of tubular member 26 , allowing spring coil 24 to function as a distal stop.
- Proximal locking hub 28is any suitable and any commercially available locking mechanism that can be configured to lock tubular member 26 to core wire 10 .
- FIG. 2is a cross-sectional view of the distal section 14 of the guidewire illustrated in FIG. 1 .
- Tubular member 26has a proximal end (not shown) and a distal end 40 .
- a shoulder 36 disposed on the proximal end of wire tip 32is adapted to prevent tubular member 26 and spring coil 24 from sliding off the distal end of core wire 10 .
- spring coil 24Abutting the distal end 40 of tubular member 26 , and the shoulder 36 of wire tip 32 , is spring coil 24 .
- spring coil 24has one or more coils helically disposed about a portion of core wire 10 .
- the distal end of spring coil 24may be attached to the shoulder 36 of wire tip 32 .
- the proximal end of spring coil 24may be attached to the distal end 40 of tubular member 26 . Attachment of spring coil 24 to either shoulder 36 or tubular member 24 may be accomplished by solder, braze, adhesive or any other suitable attachment means.
- guidewire 30can be inserted through a guide catheter into the body and placed at a desired location distal a lesion.
- Tubular member 26is then advanced distally, as shown in FIG. 3 , causing spring coil 24 to compress axially and expand in an outward direction to form a distal stop.
- a embolic protection filter 2can then be advanced to a desired location along the guidewire to capture embolic debris dislodged during the procedure.
- tubular member 26may be rotated about its major axis in either a clockwise or counter-clockwise direction, depending on the disposition of the coils, causing spring coil 24 to expand radially and form a distal stop.
- a friction fit between the inner diameter of filter 2 and the outer diameter of tubular member 26can be utilized to actuate spring coil 24 . In use, the frictional force resulting from the distal movement of filter 2 about tubular member 26 causes tubular member 26 to advance distally and compress spring coil 24 axially, thus forming a distal stop.
- a friction fit between the inner diameter of tubular member 26 and the outer diameter of core wire 10can also be utilized as an alternative to proximal locking hub 28 .
- This frictional fitis adapted to permit motion of the tubular member 26 along core wire 10 only when a sufficient force is applied to tubular member 26 by the physician.
- a locking mechanismcan be employed on the guidewire to prevent undesired movement of spring coil 24 , once guidewire 30 has been articulated.
- the locking mechanismcan be comprised of an enlarged outer diameter section 42 disposed on core wire 10 corresponding in size and shape to a reduced inner diameter portion 44 disposed on tubular member 26 .
- the enlarged diameter section 42locks into the reduced inner diameter section 44 , thereby preventing tubular member 26 from retracting proximally.
- a frictional fit and/or locking mechanismare described with respect to the exemplary embodiments illustrated in FIGS. 1-4 , these features are not limited to those embodiments. Instead, a frictional fit and/or locking mechanism may be utilized in conjunction with any embodiment to prevent the tip from reverting to a collapsed position once the guidewire has been articulated.
- FIGS. 5 and 6are cross-sectional views of the distal section 114 of an articulating guidewire in accordance with an additional embodiment of the present invention.
- an accordion-shaped polymeric tube 124can be utilized as a distal stop when actuated by a tubular member 126 .
- Polymeric tube 124can be attached proximally to distal end 140 of tubular member 126 , and distally to shoulder 136 of wire tip 132 .
- tubular member 126is advanced distally, forcing polymeric tube 124 to compress axially and expand in an outward direction.
- a embolic protection filtercan then be advanced along tubular member 126 until the distal end of the filter abuts a portion of the outwardly expanded polymeric tube 124 .
- FIGS. 7-9illustrate yet another exemplary embodiment in accordance with the present invention.
- a tubular member 224 having a proximal end 238 and a distal end 240is moveable about core wire 10 .
- Tubular member 224includes a distal section 252 which expands outwardly when compressed axially.
- distal section 252includes a plurality of openings 250 circumferentially disposed about tubular member 224 .
- the supports 254 between the openings 250are biased to displace in an outward direction when compressed axially.
- FIG. 9when tubular member 224 is advanced distally against the shoulder 236 of wire tip 232 , the supports 254 are compressed axially and displace in an outward direction, creating a distal stop.
- FIGS. 10 and 11show another exemplary embodiment in accordance with the present invention.
- an articulating guidewireis comprised of an elongated core wire 10 , a tubular segment 326 having proximal end 338 and distal end 340 , an actuatable tip 324 , and a wire tip 332 .
- a portion of tip 324is y adapted to expand in an outward direction when tubular segment 326 is advanced distally against the proximal end thereof.
- Tip 324may be comprised of any number of suitable polymeric materials such as polyethylene or polystyrene.
- an axially stiff pushing member 356 having a handle (not shown) disposed proximally thereofis shown attached to the proximal end 338 of tubular segment 326 .
- the operatoradvances tubular segment 326 distally against tip 324 with the aid of pushing member 356 , causing tip 324 to expand in the outward direction, as shown in FIG. 11 .
- FIGS. 12 and 13illustrate yet another embodiment in accordance with the present invention employing a mesh sleeve.
- the distal section 414 of an articulating guidewirecomprises an elongated core wire 10 , a tubular segment 426 having a proximal end 438 and distal end 440 , a wire tip 432 , and an expandable mesh sleeve 424 .
- the mesh sleeve 424can be attached proximally to distal end 440 of tubular segment 426 , and distally at proximal end 436 of wire tip 432 .
- the mesh sleeveis adapted to expand outwardly when compressed axially.
- Mesh sleeve 424can be comprised of any suitable material(s) such as DACRON, which is available from E. I. du Pont de Nemours and Company in Wilmington, Del.
- DACRONis a synthetic polyester material used in many medical procedures for its strength and biocompatibility.
- the operatorcan advance tubular segment 426 distally, causing the mesh sleeve 424 to expand outwardly to form a distal stop along the guidewire.
- a frictional fit and/or locking mechanismcan be utilized to prevent proximal motion of tubular member 426 once the mesh sleeve has been expanded to the second position.
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Abstract
Description
- This application is a continuation of U.S. application Ser. No. 10/083,288 filed Feb. 26, 2002.
- The present invention relates generally to the field of intravascular guidewires. More particularly, the present invention pertains to intravascular guidewires having an articulating distal section.
- The use of guidewires or core wires in conjunction with intravascular devices such as embolic protection filters or catheters is widely known. Typically, a flexible guidewire is inserted into a vascular lumen through a guide catheter, and then advanced to a desired location within the body. Once the guidewire is in place, an intravascular device such as an embolic filter can be advanced along the guidewire distal a lesion and deployed to prevent embolic debris from flowing downstream during, for example, an angioplasty or atherectomy procedure.
- To facilitate steering and tracking through the tortuous vascular system, it is desirable to have a radially flexible guidewire capable of traversing the cavities of the body by applying a force on a proximal section of the guidewire. It is also desireable for the distal section of the guidewire to have a reduced profile capable of placement beyond a lesion or other protrusion in the vasculature with minimal interference. One such series of improvements has resulted in the use of a thin, flexible guidewire having a distally tapering cross-sectional area for improved steering, and a coiled wire helix disposed about an arcuate distal end of the guidewire for improved tracking.
- The present invention relates generally to the field of intravascular guidewires. More particularly, the present invention pertains to intravascular guidewires having an articulating distal section. In one embodiment of the present invention, a guidewire having an articulating distal section is comprised of an elongated core wire having a longitudinal axis, a proximal end and a distal end; and an actuatable tip disposed about the distal end of the core wire having an outwardly expandable portion adapted to have a reduced profile in a first position, and an enlarged profile in a second position. The expandable portion of the actuatable tip may comprise a plurality of openings circumferentially disposed about the length of a tubular member. The outer diameter of the tubular member may be adapted to permit an intravascular device such as a cartridge filter to slide thereon.
- In another embodiment of the present invention, a guidewire having an articulating distal section includes an elongated core wire having a longitudinal axis, a proximal end and a distal end; an actuator moveable about the core wire; and an actuatable tip adapted to have a reduced profile in a first position, and an enlarged profile in a second position. In one implementation of the present invention, the actuatable tip may include a spring coil helically disposed about the core wire. In another exemplary implementation, the actuatable tip may include a mesh sleeve adapted to outwardly expand when compressed axially. In yet another exemplary implementation, the actuatable tip may include an accordion-shaped polymeric tube similarly adapted to outwardly expand when compressed axially.
- In another embodiment, the distal section of an articulating guidewire includes a friction fit between the core wire and the actuatable tip which can be utilized to prevent the distal section of the guidewire from reverting to the first position, once articulated. Alternatively, a locking mechanism such as a locking hub can be utilized to prevent the distal section of the guidewire from reverting to the first position, once articulated.
FIG. 1 is a plan view of an articulating guidewire in accordance with a first embodiment of the present invention.FIG. 2 is a cross-sectional view of the distal section of the guidewire inFIG. 1 showing the guidewire in a first position having a reduced profile.FIG. 3 is another cross-sectional view of the distal section of the guidewire inFIG. 1 showing the guidewire in a second position having an enlarged profile.FIG. 4 is cross-sectional view of a particular implementation of the present invention employing a locking mechanism on the distal section of the guidewire.FIG. 5 is a cross-sectional view of the distal section of an articulating guidewire in accordance with a second embodiment of the present invention, wherein the guidewire is shown in a first position having a reduced profile.FIG. 6 is another cross-sectional view of the guidewire inFIG. 5 showing the distal section of the guidewire in a second position having an enlarged profile.FIG. 7 is a cross-sectional view of the distal section of an articulating guidewire in accordance with a third embodiment of the present invention, wherein the guidewire is shown in a first position having a reduced profile.FIG. 8 is a plan view of the guidewire inFIG. 7 showing a plurality of openings circumferentially disposed about a distal section of the guidewire.FIG. 9 is another cross-sectional view of the guidewire inFIG. 7 showing the distal section of the guidewire in a second position having an enlarged profile.FIG. 10 is a cross-sectional view of a distal section of an articulating guidewire in accordance with a fourth embodiment of the present invention, wherein the guidewire is shown in a first position having a reduced profile.FIG. 11 is another cross-sectional view of the guidewire inFIG. 10 showing the distal section of the guidewire in a second position having an enlarged profile.FIG. 12 is a cross-sectional view of a distal section of an articulating guidewire in accordance with a fifth embodiment of the present invention, wherein the guidewire is shown in a first position having a reduced profile.FIG. 13 is another cross-sectional view of the guidewire inFIG. 12 showing the distal section of the guidewire in a second position having an enlarged profile.- The following detailed description should be read with reference to the drawings, in which like elements in different drawings are numbered in like fashion. Although examples of construction, dimensions, materials and manufacturing processes are illustrated for the various elements, those skilled in the art will recognize that many of the examples provided have suitable alternatives that may be utilized.
FIG. 1 is a plan view of anarticulating guidewire 30 in accordance with a first embodiment of the present invention. Guidewire30 includes anelongated core wire 10 having a relatively stiffproximal section 12, and relatively flexibledistal section 14. As shown inFIG. 1 ,core wire 10 has a relatively large profile onproximal section 12 which tapers to a smaller profile frompoint 16 topoint 18, and again atpoint 20 topoint 22.Core wire 10 may have any number of tapering sections disposed thereon without deviating from the scope of the invention. In one implementation of the present invention (not shown),core wire 10 may continuously taper fromproximal section 12 to distalsection 14.- Disposed on
distal section 14 ofcore wire 10 is awire tip 32.Wire tip 32 has a roundeddistal end 34, and is generally circular in cross-sectional area.Wire tip 32 can be atraumatic for reduced tissue damage during advancement of the guidewire. Alternatively,wire tip 32 can be comprised of a substantially hard material. - In the particular embodiment of
FIG. 1 ,guidewire 30 also includes atubular member 26 and aspring coil 24, both moveable aboutdistal section 14 ofcore wire 10.Tubular member 26 may have a length substantially similar to the length ofcore wire 10. Conversely,tubular member 26 may have a length substantially shorter than the length ofcore wire 10. In either implementation, the outer diameter oftubular member 26 is adapted to permit an intravascular device such as an embolic protection filter to slide thereon. - As discussed in greater detail below,
spring coil 24 is adapted to have a reduced profile in a first position, and an enlarged profile in a second position. In the first (i.e. reduced profile) position,spring coil 24 has an outer diameter which is substantially similar to the outer diameter oftubular member 26, facilitating placement ofguidewire 30 beyond a lesion or other protrusion within the vasculature with minimal interference. In the second (i.e. enlarged profile) position,spring coil 24 has an outer diameter greater than the outer diameter oftubular member 26, allowingspring coil 24 to function as a distal stop. - Also shown in the embodiment of
FIG. 1 is aproximal locking hub 28.Proximal locking hub 28 is any suitable and any commercially available locking mechanism that can be configured to locktubular member 26 tocore wire 10. FIG. 2 is a cross-sectional view of thedistal section 14 of the guidewire illustrated inFIG. 1 .Tubular member 26 has a proximal end (not shown) and adistal end 40. Ashoulder 36 disposed on the proximal end ofwire tip 32 is adapted to preventtubular member 26 andspring coil 24 from sliding off the distal end ofcore wire 10.- Abutting the
distal end 40 oftubular member 26, and theshoulder 36 ofwire tip 32, isspring coil 24. In the embodiment shown inFIG. 2 ,spring coil 24 has one or more coils helically disposed about a portion ofcore wire 10. The distal end ofspring coil 24 may be attached to theshoulder 36 ofwire tip 32. Similarly, the proximal end ofspring coil 24 may be attached to thedistal end 40 oftubular member 26. Attachment ofspring coil 24 to eithershoulder 36 ortubular member 24 may be accomplished by solder, braze, adhesive or any other suitable attachment means. - In use, guidewire30 can be inserted through a guide catheter into the body and placed at a desired location distal a lesion.
Tubular member 26 is then advanced distally, as shown inFIG. 3 , causingspring coil 24 to compress axially and expand in an outward direction to form a distal stop. Once the guidewire is in position and the distal stop is engaged, aembolic protection filter 2 can then be advanced to a desired location along the guidewire to capture embolic debris dislodged during the procedure. - While the particular embodiment shown in
FIG. 3 illustrates the actuation ofspring coil 24 by advancingtubular member 26 distally, it is to be recognized that other methods to actuate the distal stop may be utilized. For example,tubular member 26 may be rotated about its major axis in either a clockwise or counter-clockwise direction, depending on the disposition of the coils, causingspring coil 24 to expand radially and form a distal stop. In another exemplary implementation, a friction fit between the inner diameter offilter 2 and the outer diameter oftubular member 26 can be utilized to actuatespring coil 24. In use, the frictional force resulting from the distal movement offilter 2 abouttubular member 26 causestubular member 26 to advance distally and compressspring coil 24 axially, thus forming a distal stop. - To prevent
tubular member 26 from sliding proximally once thedistal section 14 of the guidewire has been articulated, a friction fit between the inner diameter oftubular member 26 and the outer diameter ofcore wire 10 can also be utilized as an alternative toproximal locking hub 28. This frictional fit is adapted to permit motion of thetubular member 26 alongcore wire 10 only when a sufficient force is applied totubular member 26 by the physician. - In addition to the frictional fit between
core wire 10 andtubular member 26, or the lockinghub 28 described with respect toFIG. 1 , a locking mechanism can be employed on the guidewire to prevent undesired movement ofspring coil 24, once guidewire30 has been articulated. As illustrated in the exemplary embodiment ofFIG. 4 , the locking mechanism can be comprised of an enlargedouter diameter section 42 disposed oncore wire 10 corresponding in size and shape to a reducedinner diameter portion 44 disposed ontubular member 26. When tubularmember 26 is advanced distally, as shown inFIG. 4 , theenlarged diameter section 42 locks into the reducedinner diameter section 44, thereby preventingtubular member 26 from retracting proximally. - Although the use of a frictional fit and/or locking mechanism are described with respect to the exemplary embodiments illustrated in
FIGS. 1-4 , these features are not limited to those embodiments. Instead, a frictional fit and/or locking mechanism may be utilized in conjunction with any embodiment to prevent the tip from reverting to a collapsed position once the guidewire has been articulated. FIGS. 5 and 6 are cross-sectional views of the distal section114 of an articulating guidewire in accordance with an additional embodiment of the present invention. As shown inFIG. 5 , an accordion-shapedpolymeric tube 124 can be utilized as a distal stop when actuated by a tubular member126.Polymeric tube 124 can be attached proximally to distal end140 of tubular member126, and distally to shoulder136 of wire tip132.- As shown in
FIG. 6 , once the guidewire is advanced to a desired location within the body, tubular member126 is advanced distally, forcingpolymeric tube 124 to compress axially and expand in an outward direction. A embolic protection filter can then be advanced along tubular member126 until the distal end of the filter abuts a portion of the outwardly expandedpolymeric tube 124. FIGS. 7-9 illustrate yet another exemplary embodiment in accordance with the present invention. Atubular member 224 having aproximal end 238 and adistal end 240 is moveable aboutcore wire 10.Tubular member 224 includes adistal section 252 which expands outwardly when compressed axially.- As shown in greater detail in
FIG. 8 ,distal section 252 includes a plurality ofopenings 250 circumferentially disposed abouttubular member 224. Thesupports 254 between theopenings 250, in turn, are biased to displace in an outward direction when compressed axially. As illustrated inFIG. 9 , whentubular member 224 is advanced distally against theshoulder 236 ofwire tip 232, thesupports 254 are compressed axially and displace in an outward direction, creating a distal stop. FIGS. 10 and 11 show another exemplary embodiment in accordance with the present invention. In the exemplary embodiment ofFIG. 10 , an articulating guidewire is comprised of anelongated core wire 10, atubular segment 326 havingproximal end 338 anddistal end 340, anactuatable tip 324, and awire tip 332. A portion oftip 324 is y adapted to expand in an outward direction whentubular segment 326 is advanced distally against the proximal end thereof.Tip 324 may be comprised of any number of suitable polymeric materials such as polyethylene or polystyrene.- In the particular embodiment of
FIG. 10 , an axiallystiff pushing member 356 having a handle (not shown) disposed proximally thereof is shown attached to theproximal end 338 oftubular segment 326. To articulate the distal section of the guidewire, the operator advancestubular segment 326 distally againsttip 324 with the aid of pushingmember 356, causingtip 324 to expand in the outward direction, as shown inFIG. 11 . FIGS. 12 and 13 illustrate yet another embodiment in accordance with the present invention employing a mesh sleeve. As shown inFIG. 12 , the distal section414 of an articulating guidewire comprises anelongated core wire 10, atubular segment 426 having aproximal end 438 anddistal end 440, awire tip 432, and anexpandable mesh sleeve 424.- The
mesh sleeve 424 can be attached proximally todistal end 440 oftubular segment 426, and distally atproximal end 436 ofwire tip 432. The mesh sleeve is adapted to expand outwardly when compressed axially.Mesh sleeve 424 can be comprised of any suitable material(s) such as DACRON, which is available from E. I. du Pont de Nemours and Company in Wilmington, Del. DACRON is a synthetic polyester material used in many medical procedures for its strength and biocompatibility. - As illustrated in
FIG. 13 , once the guidewire is in a desired position within the body, the operator can advancetubular segment 426 distally, causing themesh sleeve 424 to expand outwardly to form a distal stop along the guidewire. As with any of the previous embodiments, a frictional fit and/or locking mechanism can be utilized to prevent proximal motion oftubular member 426 once the mesh sleeve has been expanded to the second position. - Having thus described the several embodiments of the present invention, those of skill in the art will readily appreciate that other embodiments may be made and used which fall within the scope of the claims attached hereto. Numerous advantages of the invention covered by this document have been set forth in the foregoing description. It will be understood, however, that this disclosure is, in many respects, only illustrative. Changes may be made in details, particular in matters of shape, size and arrangement of parts without exceeding the scope of the invention.
Claims (17)
1. An articulating guidewire, comprising:
an elongated core wire having a longitudinal axis, a proximal end and a distal end;
an actuatable stop comprising a polymeric tube disposed at the distal end of said core wire, said actuatable stop moveable between a collapsed position and an expanded position;
an actuator coupled to the stop, said actuator moveable between a first position and a second position to move the stop between the collapsed position and the expanded position; and
a filter disposed on the core wire.
2. The guidewire ofclaim 1 , wherein said polymeric tube is accordion-shaped.
3. The guidewire ofclaim 1 , wherein the distal section of said tubular member includes a plurality of circumferentially disposed openings adapted to permit a plurality of struts disposed therebetween to expand in an outward direction.
4. The guidewire ofclaim 1 , wherein the inner diameter of said tubular member is substantially similar to the outer diameter of the core wire.
5. The guidewire ofclaim 1 , wherein the inner diameter of said tubular member is larger than the outer diameter of the core wire.
6. The guidewire ofclaim 1 , further comprising a locking mechanism adapted to prevent relative motion between the actuatable stop and the core wire.
7. The guidewire ofclaim 6 , wherein the locking mechanism comprises an enlarged outer diameter portion disposed on the core wire.
8. The guidewire ofclaim 6 , wherein the locking mechanism comprises an enlarged outer diameter portion disposed on the core wire corresponding in size and shape to a reduced inner diameter portion disposed on the actuatable stop.
9. The guidewire ofclaim 6 , wherein the locking mechanism comprises a locking hub disposed about a proximal portion of the core wire.
10. An articulating guidewire, comprising:
an elongated core wire having a longitudinal axis, a proximal end and a distal end;
an actuatable stop comprising a spring coil disposed at the distal end of said core wire, said actuatable stop moveable between a collapsed position and an expanded position;
an actuator disposable about the core wire, said actuator having a proximal end and a distal end; and
a filter disposed on the core wire.
11. The guidewire ofclaim 10 , wherein the spring coil is helically disposed about the core wire.
12. The guidewire ofclaim 10 , wherein the inner diameter of the actuator is substantially similar to the outer diameter of the core wire.
13. The guidewire ofclaim 10 , wherein the inner diameter of the actuator is larger than the outer diameter of the core wire.
14. The guidewire ofclaim 10 , further comprising a locking mechanism adapted to prevent proximal motion of the actuator relative to the core wire.
15. The guidewire ofclaim 14 , wherein the locking mechanism comprises an enlarged outer diameter portion disposed on the core wire.
16. The guidewire ofclaim 14 , wherein the locking mechanism comprises an enlarged outer diameter portion disposed on the core wire corresponding in size and shape to a reduced inner diameter portion disposed on the actuator.
17. The guidewire ofclaim 14 , wherein the locking mechanism comprises a locking hub disposed about a proximal portion of the core wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/466,758US20070021775A1 (en) | 2002-02-26 | 2006-08-23 | Articulating guidewire for embolic protection and methods of use |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/083,288US7118539B2 (en) | 2002-02-26 | 2002-02-26 | Articulating guide wire for embolic protection and methods of use |
| US11/466,758US20070021775A1 (en) | 2002-02-26 | 2006-08-23 | Articulating guidewire for embolic protection and methods of use |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10/083,288ContinuationUS7118539B2 (en) | 2002-02-26 | 2002-02-26 | Articulating guide wire for embolic protection and methods of use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20070021775A1true US20070021775A1 (en) | 2007-01-25 |
Family
ID=27753274
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10/083,288Expired - Fee RelatedUS7118539B2 (en) | 2002-02-26 | 2002-02-26 | Articulating guide wire for embolic protection and methods of use |
| US11/466,758AbandonedUS20070021775A1 (en) | 2002-02-26 | 2006-08-23 | Articulating guidewire for embolic protection and methods of use |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10/083,288Expired - Fee RelatedUS7118539B2 (en) | 2002-02-26 | 2002-02-26 | Articulating guide wire for embolic protection and methods of use |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US7118539B2 (en) |
| EP (1) | EP1487526B1 (en) |
| AT (1) | ATE480285T1 (en) |
| AU (1) | AU2003216365A1 (en) |
| DE (1) | DE60334083D1 (en) |
| WO (1) | WO2003072179A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2003072179A1 (en) | 2003-09-04 |
| US7118539B2 (en) | 2006-10-10 |
| ATE480285T1 (en) | 2010-09-15 |
| EP1487526B1 (en) | 2010-09-08 |
| AU2003216365A1 (en) | 2003-09-09 |
| EP1487526A1 (en) | 2004-12-22 |
| US20030163064A1 (en) | 2003-08-28 |
| DE60334083D1 (en) | 2010-10-21 |
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Legal Events
| Date | Code | Title | Description |
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| STCB | Information on status: application discontinuation | Free format text:ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |