US20060190037A1 - Integrated vascular device with puncture site closure component and sealant and methods of use - Google Patents

Abstract

Apparatus and methods are provided for use in sealing a vascular puncture site. The invention comprises an integrated vascular device having a sheath with a closure component and puncture sealant. The closure component is disposed on and advanceable over the exterior of the sheath and may comprise any of a variety of apparatus suited for closing a vascular puncture. Once the closure component has been actuated to close the puncture, sealant is introduced to seal the puncture. The sheath and closure component are then removed from the patient.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• This application is a divisional of U.S. patent application Ser. No. 10/147,774, filed May 17, 2002, which is a continuation-in-part of U.S. patent application Ser. No. 09/478,179 filed Jan. 5, 2000, now U.S. Pat. No. 6,197,042, the disclosures of which are each incorporated by reference herein.
BACKGROUND OF THE INVENTION
• 1. The Field of the Invention
• The present invention relates to apparatus and methods for sealing an iatrogenic puncture in a vessel formed in conjunction with a diagnostic or therapeutic treatment. More particularly, the present invention provides an integrated vascular device comprising a sheath having a puncture closure components and puncture sealant.
• 2. The Relevant Technology
• Catheterization and interventional procedures, such as angioplasty and stenting, generally are performed by inserting a hollow needle through a patient's skin and muscle tissue into the vascular system. A guide wire then is passed through the needle lumen into the patient's blood vessel. The needle is removed and an introducer sheath is advanced over the guide wire into the vessel. A catheter typically is passed through the lumen of the introducer sheath and advanced over the guide wire into position for a medical procedure. The introducer sheath therefore facilitates insertion of various devices into the vessel while minimizing trauma to the vessel wall and minimizing blood loss during a procedure.
• Upon completion of the medical procedure, the catheter and introducer sheath are removed, leaving a puncture site in the vessel. Commonly, external pressure is applied until clotting and wound sealing occurs. However, this procedure is time consuming and expensive, requiring as much as an hour of a physician's or nurse's time, is uncomfortable for the patient, and requires that the patient be immobilized in the operating room, cathlab, or holding area. Furthermore, a risk of hematoma exists from bleeding prior to hemostasis.
• Various apparatus have been developed for percutaneously sealing a vascular puncture by occluding or suturing the puncture site. For example, U.S. Pat. Nos. 5,192,302 and 5,222,974 to Kensey et al. describe the use of a biodegradable plug delivered through the introducer sheath into the puncture site. When deployed, the plug seals the vessel and provides hemostasis. Such devices have been slow to gain acceptance in the medical community, however, due to difficulties encountered in positioning the plug within the vessel.
• Another previously known technique comprises percutaneously suturing the puncture site with specialized apparatus. Such apparatus is described, for example, in U.S. Pat. No. 5,304,184 to Hathaway et al. While percutaneous suturing devices may be effective, a significant degree of skill may be required on the part of the practitioner. Because such devices are mechanically complex, they tend to be relatively expensive to manufacture.
• Surgical staples and resilient clips for external skin wound closure are well known in the art. Examples include U.S. Pat. No. 5,026,390 to Brown and U.S. Pat. No. 5,683,405 to Yacoubian et al, which both describe resiliently deformable closure devices suitable for manual external application.
• To reduce the cost and complexity of percutaneous puncture closure devices, such devices employing resilient or deformable clips have been developed. U.S. Pat. No. 5,478,354 to Tovey et al. describes the use of resilient clips in conjunction with a trocar to close abdominal puncture wounds. U.S. Pat. No. 5,810,846 to Virnich et al. describes a specialized apparatus for closing a vascular puncture site with a plastically deformable clip. The apparatus preferably is advanced over a guide wire through a cannula to the surface of the puncture site, where the staple-like clips are delivered to close the wound.
• U.S. Pat. No. 5,782,861 to Cragg et al. describes specialized apparatus for closing a puncture site with a detachable clip. The apparatus comprises a hollow shaft having a distal end formed with one or more opposed pairs of resilient grasping prongs and that is advanced over a guide wire through a coaxial hollow tube to a position at the distal end of the tube just proximal of the puncture. The grasping prongs are extended beyond the distal end of the tube to grasp the vessel on opposing sides of the puncture. The shaft then is partially retracted, causing the prongs to contract within the tube, thereby sealing the puncture site.
• The use of backbleed indication as a positioning technique within a vascular puncture is known. For example, U.S. Pat. No. 4,317,445 to Robinson describes a flashback chamber for providing visual indication of venous entry of a cannula. However, that device does not discuss vascular wound closure. U.S. Pat. No. 5,676,689 to Kensey et al., which claims priority from the U.S. Pat. No. 5,222,974 patent discussed above, uses a vessel location device to simplify positioning of the biodegradable plug. The vessel locator enables blood from the vessel to flow there through so that the position of the vessel may be determined. However, the Kensey system only proffers one closure device, and that device is complex and raises concerns about biocompatibility. It also requires the closure component to be positioned within the puncture, thereby increasing the likelihood of dangerous over-advancement of the plug into the vessel.
• The percutaneous puncture closure devices described in the foregoing patents generally have the drawback that they require relatively complex mechanisms and require time consuming manipulation to achieve hemostasis. It therefore would be desirable to provide apparatus and methods suitable for vascular puncture closure that overcome these disadvantages of previously known devices.
• It also would be desirable to provide apparatus and methods that quickly and effectively achieve hemostasis.
• It further would be desirable to provide apparatus and methods wherein all foreign materials left in a patient's body are bioabsorbable.
• It still further would be desirable to provide vascular puncture closure apparatus and methods that are safe, low cost, and easy to use.
BRIEF SUMMARY OF THE INVENTION
• In view of the foregoing, it is an object of the present invention to provide vascular puncture closure apparatus and methods that overcome disadvantages of previously known devices.
• It also is an object of this invention to provide apparatus and methods suitable for vascular puncture closure that quickly and effectively achieve hemostasis.
• It further is an object of the present invention to provide apparatus and methods wherein all foreign materials left in a patient's body are bioabsorbable.
• It still further is an object of the present invention to provide vascular puncture closure apparatus and methods that are safe, low cost, and easy to use.
• These and other objects of the present invention are accomplished by provided an integrated vascular device comprising a sheath having a puncture closure component and puncture sealant. The closure component is disposed on and advanceable over the exterior of the sheath, which may, for example, comprise an introducer sheath, a trocar, or a catheter. The closure component may comprise any of a variety of apparatus suited to close a vascular puncture. Once the closure component has been actuated to close the puncture, sealant is introduced to the exterior surface of the closed puncture, preferably through the sheath's interior lumen, where the sealant seals the puncture closed. The sheath with closure component is then removed from the patient.
• In a preferred embodiment constructed in accordance with the present invention, the closure component comprises a twist closure device. The device pierces tissue surrounding the vascular puncture and then is rotated to close the wound. In an alternative embodiment, the closure component comprises needles and an elastic segment surrounding the needles. The needles pierce the puncture with the elastic segment expanded. The segment is then allowed to resiliently contract to an unstressed configuration of smaller diameter, thereby drawing the needles together and closing the wound.
• In a still further alternative embodiment, the needles, or prongs, are elastically deformed to an expanded diameter, in which they pierce the tissue adjacent to puncture. The needles then are allowed to resiliently contract to an unstressed configuration of smaller diameter, thereby closing the wound.
• Sealant then may be introduced, preferably through the interior lumen of the sheath, to seal the puncture closed. The sealant may comprise any of a variety of sealants, per se known, including adhesives, sutures, and clips, all of which are preferably bioabsorbable. Alternatively, the closure component may further comprise the sealant, wherein the closure component is left in place within the vessel until hemostasis naturally occurs, or wherein the closure component comprises a monopolar electrode or opposed bipolar electrodes that cauterize the wound with RF current. In addition to cauterization, RF energy generates heat that beneficially causes shrinkage of the vascular tissue, thereby assisting closure of the wound. Thermal energy from electrical induction, infrared light, ultrasonic vibration, microwave or laser irradiation, and other means may also be used to seal the puncture.
• Advantageously, the puncture closure component of the present invention is inexpensively integrated into a sheath, thereby minimizing mechanical complexity while providing quick, safe, effective, and easy-to-use apparatus for achieving vascular closure that overcomes drawbacks of previously known devices. Methods of using the apparatus of the present invention also are provided.
BRIEF DESCRIPTION OF THE DRAWINGS
• The above and other objects and advantages of the present invention will be apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout, and in which:
• FIG. 1 is a side view of a preferred embodiment of an integrated vascular device constructed in accordance with the present invention;
• FIG. 2 is a side-sectional view of a sealing device for use with the vascular device ofFIG. 1;
• FIGS. 3A-3D are side views of the closure component ofFIG. 1 in use at a vascular puncture site, shown in section, with the sealing device ofFIG. 2, illustrating a method of sealing the puncture site;
• FIGS. 4A-4D are top views of the vascular puncture site ofFIG. 3, corresponding to the side-sectional views ofFIG. 3, further illustrating the method ofFIG. 3;
• FIGS. 5A-5C are side-sectional views of an alternative embodiment of an integrated vascular device of the present invention in use at a vascular puncture site, illustrating a method of sealing the puncture site;
• FIGS. 6A-6E are side-sectional views of a further alternative embodiment in use at a vascular puncture site, illustrating a method of sealing the puncture site; and
• FIGS. 7A and 7B are isometric views of a section of vessel including and corresponding to the vascular puncture site ofFIG. 6, further illustrating the method ofFIG. 6.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
• The integrated vascular sheath with closure component of the present invention overcomes disadvantages associated with previously known methods and apparatus for sealing a vascular puncture by providing a quick, simple, safe, low cost, effective, and easy-to-use solution to wound closure. Apparatus constructed in accordance with the present invention provide vascular access and wound closure in a single device, eliminating the time and manipulation required to insert a separate closure device at the completion of a procedure.
• Referring toFIG. 1, a first embodiment of apparatus of the present invention is described.Vascular device10 comprisessheath12 coupled tohub14,closure component16, andclosure actuator18.
• Sheath12, which may, for example, comprise an introducer sheath, a trocar, or a catheter, includescentral lumen13 through which other devices may be introduced into the vasculature, for example, to perform a diagnostic or interventional procedure such as angiography, angioplasty, or stenting, or to seal a puncture site.
• Hub14 is mounted on the proximal end ofsheath12 and includesside port20,arc lumens22, anddevice port24.Device port24 communicates withcentral lumen13 ofsheath12, and has self-sealingelastomeric membrane25 disposed across it. Self-sealingmembrane25, which may comprise, for example, latex or a biocompatible synthetic rubber, permits interventional devices to be introduced throughdevice port24, while preventing blood loss throughcentral lumen13.Side port20 ofhub14 is also in communication withcentral lumen13, and is connected tohemostatic port26 viabiocompatible tubing28.
• In accordance with the principles of the present invention,closure component16 compriseslumen30 that receivessheath12.Component16 is slidably disposed on the exterior ofsheath12 and is movable from a stowed position,adjacent hub14, to a distal deployment position, wheretines17 ofcomponent16 are urged into engagement with tissue surrounding a vascular puncture.Closure component16 comprises at least two sharpened tips, ortines17.Tines17 preferably comprisebackbleed ports32.Closure component16 is rotatable within arc-lumens22 about the longitudinal axis ofsheath12, so that, withtines17 engaging tissue surrounding the vascular puncture,component16 closes the puncture.
• Closure actuator18 comprisesplunger34 andtubes36, which are configured to slidably pass througharc lumens22 ofhub14. The proximal ends oftubes36 are coupled to backbleed bores38 ofplunger34. The distal ends oftubes36 are mounted, either permanently or detachably, inclosure component16, so that movement ofplunger34 causes corresponding proximal or distal movement ofclosure component16. Likewise, rotation ofplunger34 causes corresponding rotation oftubes36 withinarc lumens22, which, in turn, rotatesclosure component16 about the longitudinal axis ofsheath12.
• Plunger34 further comprises device bore40, coaxially aligned withdevice port24, and through which interventional devices or puncture sealants may be passed. As described in detail hereinafter, whenplunger34 is moved to its proximal-most position,closure component16 is disposed adjacent tohub14 and preferably provides adequate clearance for interventional devices to be inserted throughdevice port24 andcentral lumen13 into the patient's vasculature. When moved to its distal-most position,plunger34causes tubes36 to urgeclosure component16 distally. Interventional devices or sealants then may be introduced through device bore40,device port24, andcentral lumen13 into the vasculature.
• Backbleed bores38 ofplunger32 are in communication with backbleed lumens (not shown) withintubes36. The backbleed lumens oftubes36 are in communication withbackbleed ports32 oftines17, thereby establishing a complete backbleed path throughports32, the lumens (not shown) oftubes36, and bores38. Whentines17 ofclosure component16 pierce a vessel wall surrounding a vascular puncture, blood entersbackbleed ports32 and exits through backbleed bores38, providing visual confirmation to a surgeon that tines17 are positioned within the vessel wall. The backbleed path thus enables the surgeon to determine whenclosure component16 has been sufficiently advanced to permit rotation ofcomponent16 to close the puncture, while reducing the risk thatcomponent16 is either short of the puncture site or is extended into the vessel.
• In conjunction with closure of the puncture site caused by rotation ofcomponent16, a puncture sealant may be introduced to the puncture site to seal the site closed. The sealant may, for example, comprise an adhesive, such as a bioglue, tissue sealant, or clotting agent, delivered throughhemostatic port26,biocompatible tubing28,side port20 andcentral lumen13 ofintroducer sheath12 to the vascular puncture to further help seal the vessel after puncture closure withclosure component16. Alternatively, the adhesive may be delivered throughdevice port24 or through the backbleed path described above. Instead of adhesives, the closure component may further comprise the sealant, wherein the closure component is left in place within the vessel until hemostasis naturally occurs. The sealant may also comprise sutures delivered throughcentral lumen13. Additionally, the sealant may comprise thermal energy application from, for example, electrical induction, infrared light, ultrasonic vibration, microwave or laser irradiation, and other means.
• With reference toFIG. 2, an alternative puncture sealing device in accordance with the present invention is described.Sealing device50 comprisesdelivery device52 andclip54.Delivery device52 comprisesproximal end56 attached totube58.Tube58 terminates atfirst jaw60 at its distal end and further compriseslumen62 andpin64.Pin64 extends intolumen62 from an interior surface oftube58 and is disposed perpendicular to the longitudinal axis oftube58.
• Delivery device52 further comprisessecond jaw66 havingfemale connector68 coupled to pin64, so thatsecond jaw66 pivots aboutpin64.Second jaw66 further comprisesmoment arm70.Tension spring72 is coupled tomoment arm70 and to the interior surface oftube58 in a manner that biasessecond jaw66 againstfirst jaw60.
• First jaw60 andsecond jaw66 preferablyform channel74 when biased against one another.Channel74 is configured to receiveclip54. The biasing force applied bytension spring72 holdsclip54 withinchannel74, so that the clip may be advanced into tissue surrounding a vascular puncture that has had its edges approximated by closure component16 (FIG. 1).
• Delivery device52 still further comprisesplunger76 coupled topushrod78 havingrelease arm80.Pushrod78 is received withinlumen62 oftube58, so thatrelease arm80 engagesmoment arm70.
• Distal advancement ofpushrod78, via application of force to plunger76, causesrelease arm80 to urgemoment arm70 distally. This motion overcomes the biasing force applied bytension spring72 and causessecond jaw66 to pivot aboutpin64.Second jaw66 thus no longer contactsfirst jaw60, andclip54 is released fromchannel74.Tube58,first jaw60,second jaw66, andclip54 of sealingdevice50 preferably are sized for introduction into a patient's vasculature through device bore40,device port24, andlumen13 ofvascular device10.
• Referring toFIGS. 3A-3D through4A-4D, in conjunction withFIGS. 1 and 2, a method of usingvascular device10 with sealingdevice50 is described.Sheath12 is advanced through skin, fat, and muscle tissue into vessel V, through the vessel wall tissue surrounding vascular puncture P. Withplunger34 andtubes36 ofactuator18 in the proximal-most, fully retracted position, an interventional procedure is performed by introducing one or more interventional devices, e.g. angioplasty balloons, stent delivery systems, atherectomy devices, etc., throughdevice port24 andlumen13 ofsheath12, in accordance with well-known techniques.Side port20 may be used to infuse fluids, e.g., contrast agents or medications, into the vessel throughsheath12 during the interventional procedure.
• Upon completion of the procedure,vascular device10 may be advantageously used to close vascular puncture P. At this point,closure actuator18 andclosure component16 are disposed in the proximal-most position, withcomponent16 adjacent tohub14.Closure actuator18 is advanced by urgingplunger34 in the distal direction, thus causingtubes36 to slide througharc lumens22 ofhub14 andadvance closure component16.
• As seen inFIG. 3A, continued distal advancement ofplunger34causes tines17 at the distal end ofclosure component16 to pierce tissue surrounding puncture P, so that thebackbleed ports32 oftines17 directly communicate with the puncture wound. Tine punctures T inFIG. 4A represent the points at whichtines17 enter vessel V. The presence of pressure in the vessel higher than atmospheric pressure causes blood to pass throughbackbleed ports32, through the backbleed lumens (not shown) oftubes36, and exit through the proximal ends of backbleed bores38, thus confirming thattines17 have engaged tissue around the puncture site and should not be advanced further.
• InFIG. 3B,sheath12 is removed from puncture P to facilitate closure of the puncture.Closure actuator18 is held stationary whilehub14 is withdrawn proximally, thereby withdrawingsheath12 proximally from puncture P. The puncture remains open, as seen inFIG. 4B. Withsheath12 no longer within puncture P,closure actuator18 is rotated withinarc lumens22 to rotateclosure component16. Rotation ofclosure component16causes tines17 to rotate and urge the puncture closed, as seen inFIGS. 3C and 4C.
• Upon closure of puncture P, a sealant is introduced to seal the wound closed. The sealant may, for example, comprise an adhesive, such as a bioglue, tissue sealant, or clotting agent, it may comprise a suture, it may comprise thermal energy application, or it may comprise leaving the closure component in place within vessel V until hemostasis naturally occurs. Alternatively, the sealing device may comprise a clip, as described hereinafter.
• FIGS. 3D and4D show apparatus10 used in conjunction with sealingdevice50 ofFIG. 2. Withclip54 disposed inchannel74 ofdelivery device52, the delivery device is delivered to vessel V through device bore40 ofclosure actuator18,device port24 ofhub14, andcentral lumen13 ofsheath12.Clip54 punctures the vessel at tissue surrounding closed puncture P, creating clip punctures C and sealing the puncture.Pushrod78 ofdelivery device52 is then actuated to separatesecond jaw66 fromfirst jaw60 to releaseclip54 fromdelivery device52.Apparatus10 anddelivery device52 are removed from the patient to complete the procedure.Clip54 maintains closure until hemostasis occurs and is preferably bioabsorbable so that no foreign materials are permanently implanted in the patient's body. Additional clips may also be implanted, as required.
• With reference now toFIGS. 5A-5C, an alternative integrated vascular device in accordance with the present invention is described.Apparatus100 comprisessheath102 coupled tohub104,closure component106, andclosure actuator108.
• Likesheath12,sheath102 may, for example, comprise an introducer sheath, a trocar, or a catheter, and includescentral lumen103 through which other devices may be introduced into the vasculature, for example, to perform a diagnostic or interventional procedure such as angiography, angioplasty, or stenting, or to seal a puncture site.Hub104 comprises bore110, which slidably receivesactuator108, anddevice port112, which is in communication withcentral lumen103 ofsheath102 and permits introduction of interventional devices while preventing blood loss throughcentral lumen103.Hub104 further comprisesside port114.
• Closure component106 comprisesouter housing116 havinglumen118 configured to slidably receivesheath102, bore120 for slidably receivinginner housing122,lumen124 adapted to receiveclosure actuator108, and needles orprongs126 with sharpenedtips128.Inner housing122 haslumen123 adapted to receivesheath102 andchannels130 adapted to receiveprongs126.Component106 comprises at least twoprongs126, and preferably comprises four.
• Closure actuator108 comprisesactuation tube132 havinglumen133,actuation rod134 disposed withinactuation tube132,first plunger136 coupled to the proximal end oftube132, andsecond plunger138 coupled to the proximal end ofrod134. The distal end oftube132 is affixed, either permanently or detachably, inlumen124 toouter housing116 ofclosure component106, while the distal end ofrod134 is coupled toinner housing122.
• To perform an interventional procedure throughcentral lumen103 ofsheath102, the sheath is advanced through skin, fat, and muscle tissue into vessel V, through vascular puncture P, in accordance with well-known techniques. Withclosure component106 in the proximal-most, fully retracted positionadjacent hub104, the interventional procedure then is performed by introducing one or more interventional devices, e.g. angioplasty balloons, stent delivery systems, atherectomy devices, etc., throughdevice port112 andlumen103 ofsheath102, again in accordance with well-known techniques.Side port114 may be used to infuse fluids, e.g., contrast agents or medications, into the vessel throughsheath102 during the interventional procedure.
• Upon completion of the procedure,apparatus100 advantageously may be used to close the vessel.Closure component106 is advanced distally by urgingplungers136 and138 distally.Inner housing122 is only partially received withinbore120 ofouter housing116 so thatprongs126 are elastically deformed and received withinchannels130. As shown inFIG. 5A,closure component106 is advanced untilinner housing122 abuts against the vessel V, as may be determined, for example, with a backbleed indicator (not shown).
• InFIG. 5B,first plunger136 is urged distally to distallyadvance actuation tube132 andouter housing116, whilesecond plunger138 andsheath102 are held stationary. Advancement ofouter housing116 advances sharpenedtips128 ofprongs126 into tissue surrounding puncture P.
• InFIG. 5C,sheath102 andsecond plunger138 are retracted proximally to drawsheath102 out of vessel V and to drawinner housing122 completely withinbore120 ofouter housing116. Proximally retractinginner housing122 viaactuation rod134 andsecond plunger138 removesprongs126 ofouter housing116 fromchannels130 of the inner housing. The prongs resiliently contract to a lower stress configuration, thereby drawing opposing sides of puncture P together and closing the wound. A sealant, forexample clip54 ofFIG. 2, may then be introduced to the closed puncture to seal the site closed, as discussed hereinabove. Alternatively, the sealing device may comprise RF current, supplied by an RF generator (not shown), applied acrossopposed tips128, which act as bipolar electrodes.
• Referring toFIGS. 6A-6E, as well asFIGS. 7A and 7B, a still further alternative embodiment of apparatus of the present invention is described.FIG. 6 depict the closure component of an integrated vascular device in use at vascular puncture P withinvessel V. Apparatus150 comprisessheath152 coupled to a hub (not shown),closure component154, and a closure actuator (not shown). Various closure actuators for use withclosure component154 will be apparent to those of skill in the art from the foregoing embodiments.
• Sheath152 may, for example, comprise an introducer sheath, a trocar, or a catheter, and includescentral lumen153 through which other devices may be introduced into the vasculature, for example, to perform a diagnostic or interventional procedure such as angiography, angioplasty, or stenting, or to seal a puncture site.Closure component154 comprisesspacer156, needles158, andneedle cover160.Spacer156 is coaxially and slidably disposed about the exterior ofsheath152, and preferably has an annular diameter of about 1 mm to ensure thatneedles158 engage the tissue surrounding puncture P rather than enter the puncture, so that the needles are able to draw the wound closed, as described hereinbelow.Needles158 are disposed betweenspacer156 and cover160 during advancement to puncture P. Needles158 compriseledges162, which act as positive stops to prevent excessive advancement of the needles with respect to cover160, which comprises correspondingannular ledge164. Cover160 further compriseselastic segment166, configured to elastically deform needles158.Closure component154 comprises at least twoneedles158, and preferably comprises four.Needles158 may further comprise retaining means (not shown), such as barbs or hooks, to assist in gripping tissue.
• As shown inFIG. 6A,sheath152 may be advanced through skin, fat, and muscle tissue into vessel V, through vascular puncture P, in accordance with well-known techniques. Withclosure component154 in a proximal-most, fully retracted position adjacent the hub, an interventional procedure is performed throughcentral lumen153 ofsheath152 by introducing one or more interventional devices through the lumen into the patient's vasculature.Closure component154 then is advanced via the closure actuator until it abuts against vessel V, as may be determined, for example, with a backbleed indicator, such as described for the foregoing embodiments. Cover160 protectsneedles158 and prevents snagging of tissue asclosure component154 is distally advanced downsheath152 and through skin, fat, and muscle tissue.Spacer156 retainsneedles158 in a position away from the edge of puncture P.
• InFIG. 6B, needles158 are distally advanced with respect toneedle cover160 untilledge162 abutsledge164.Needles158 deflectelastic segment166 ofcover160 outward and pierce tissue surrounding puncture P.FIG. 7A depicts, in isometric view, the segment of vessel V surrounding puncture P. With a needle arrangement comprising fourneedles158, the needles create needle punctures N surrounding vascularpuncture P. Sheath152 andspacer156 then are retracted proximally and removed from vessel V, as shown inFIG. 6C. As depicted inFIGS. 6D and 7B,elastic segment166 ofneedle cover160 resiliently contracts, thereby drawingneedles158 together and approximating the edges of the wound.
• A sealant, such as a bioglue, tissue sealant, or clotting agent, then may be introduced to the puncture site to seal the wound closed. Alternatively,closure component154 may be maintained in position until hemostasis occurs naturally, or sutures may be introduced throughcentral lumen153. In addition, or in the alternative, RF energy may be applied acrossneedles158, as described hereinabove with respect toFIG. 5, or a clip, such asclip54 of sealingdevice50 ofFIG. 2, may be applied. Thermal energy from electrical induction, infrared light, ultrasonic vibration, microwave or laser irradiation, and other means may also be used to seal the puncture.
• Illustratively,FIG. 6E depicts sealingdevice170, comprising adhesive172, being delivered throughcentral lumen153 withindelivery sheath174. After sufficient time for adhesive172 to set,apparatus150 is removed from vessel V.
• Although preferred illustrative embodiments of the present invention are described hereinabove, it will be evident to one skilled in the art that various changes and modifications may be made without departing from the invention. It is intended in the appended claims to cover all such changes and modifications that fall within the true spirit and scope of the invention.

Claims (20)

1. A method of closing an opening in tissue, comprising:

disposing a sheath within a tissue tract, wherein a distal end of the sheath is disposed within an opening formed in tissue;

performing a medical procedure through a lumen of the sheath;

closing the opening with a closure component, the closure component comprising at least two sharpened tips for engagement with tissue adjacent the opening, the sharpened tips having an expanded delivery configuration and a retracted deployed configuration to close the opening; and

applying a sealing means to the opening to effect closure of the opening.

2. The method according toclaim 1, wherein the step of applying a sealing means comprises applying a sealing means selected from a group consisting of RF energy, thermal energy, electrical induction, infrared light, ultrasonic vibration, microwave or laser irradiation, clips, sutures, or adhesives.

3. The method according toclaim 1, further comprising the step of delivering a sealant to the opening.

4. The method according toclaim 1, further comprising the step of disposing a clip adjacent the opening to further seal the opening closed.

5. The method according toclaim 1, wherein the closing step further comprises rotating the closure component after engaging the sharpened tips with the tissue.

6. The method according toclaim 1, wherein the sharpened tips are associated with elastically deformed prongs.

7. The method according toclaim 6, wherein the step of closing the opening further comprises moving a member within the closure component proximally to enable the elastically deformed needles to resiliently contract.

8. A method of closing an opening in tissue, comprising:

disposing a sheath within a tissue tract, wherein a distal end of the sheath is disposed within an opening formed in tissue;

performing a medical procedure through a lumen of the sheath;

positioning a closure component to close the opening, the closure component comprising at least two sharpened tips for engagement with tissue adjacent the opening, the sharpened tips having an expanded delivery configuration and a retracted deployed configuration;

closing the opening formed in the tissue; and

applying a sealing means to the opening to effect closure of the opening.

9. The method according toclaim 8, wherein positioning the closure component comprises sliding the closure component along the sheath until the at least two sharpened tips engage with tissue.

10. The method according toclaim 8, wherein closing the opening comprises moving a member within the closure component proximally to move the at least two sharpened tips towards one another.

11. The method according toclaim 8, wherein closing the opening comprises rotating the closure component after engaging the at least two sharpened tips with the tissue.

12. A method of closing an opening in tissue, comprising:

disposing a sheath within a tissue tract, the sheath comprising a proximal end, a distal end disposable within an opening formed in tissue, and a lumen extending from the proximal end toward the distal end;

performing a medical procedure through the lumen of the sheath;

positioning a closure component upon the tissue adjacent to the opening, the closure component comprising at least two sharpened tips for engagement with tissue, the sharpened tips having an expanded delivery configuration and a retracted deployed configuration;

closing the opening formed in the tissue; and

applying a sealing means to the opening to effect closure of the opening.

13. The method according toclaim 12, wherein applying the sealing means comprises:

disposing a sealing device, which supports a clip, through the lumen of the shaft;

deploying the clip from the sealing device to effect closure of the opening.

14. The method according toclaim 13, wherein disposing the sealing device comprises moving the sealing device through the lumen until at least two sharpened tips of the clip contacts the tissue.

15. The method according toclaim 13, further comprising delivering a sealant to the opening.

16. The method according toclaim 13, wherein the sealing device comprises a first jaw and a second jaw pivotal relative to the first jaw, the first jaw and the second jaw selectively retaining the clip.

17. The method according toclaim 15, wherein deploying the clip comprises moving the second jaw relative to the first jaw to release the clip.

18. The method according toclaim 13, wherein closing the opening comprises moving a member within the closure component proximally to move the at least two sharpened tips towards one another.

19. The method according toclaim 18, wherein the at least two sharpened tips are associated with elastically deformed needles, and wherein moving the member releases the elastically deformed needles and moves the at least two sharpened tips towards one another.

20. The method according toclaim 13, wherein closing the opening comprises rotating the closure component after engaging the at least two sharpened tips with the tissue.

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