Apparatus and methods for sealing a vascular puncture
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-017/08
A61B-017/03
A61D-001/00
출원번호
US-0982384
(2004-11-05)
등록번호
US-7335220
(2008-02-26)
발명자
/ 주소
Khosravi,Farhad
Pai,Suresh S.
Bagaoisan,Celso J.
출원인 / 주소
Access Closure, Inc.
대리인 / 주소
English,William A.
인용정보
피인용 횟수 :
252인용 특허 :
131
초록▼
Apparatus for sealing a puncture communicating with a blood vessel includes a porous carrier formed from lyophilized hydrogel or other material. The plug may include at least first and second hydrogel precursors and a pH adjusting agent carried by the porous carrier in an unreactive state prior to e
Apparatus for sealing a puncture communicating with a blood vessel includes a porous carrier formed from lyophilized hydrogel or other material. The plug may include at least first and second hydrogel precursors and a pH adjusting agent carried by the porous carrier in an unreactive state prior to exposure to an aqueous physiological environment. Once exposed to bodily fluids, the carrier expands as the lyophilized material hydrates to enhance and facilitate rapid hemostasis of the puncture. When the plug is placed into the puncture, the natural wetting of the plug by bodily fluids (e.g., blood) causes the first and second precursors to react and cross-link into an adhesive or "sticky" hydrogel that aids in retaining the plug in place within the puncture.
대표청구항▼
We claim: 1. An apparatus for sealing a puncture extending through tissue, comprising: a cartridge comprising a proximal end, a distal end sized for insertion into a puncture through tissue, and a lumen extending between the proximal and distal ends; a plug disposed within the cartridge lumen, the
We claim: 1. An apparatus for sealing a puncture extending through tissue, comprising: a cartridge comprising a proximal end, a distal end sized for insertion into a puncture through tissue, and a lumen extending between the proximal and distal ends; a plug disposed within the cartridge lumen, the plug comprising a lumen extending between proximal and distal ends thereof; a pusher member disposed within the cartridge lumen for deploying the plug from the cartridge when the cartridge is retracted relative to the pusher member; a positioning member comprising an elongate member and an expandable positioning element carried on a distal end of the elongate member, the elongate member received though the lumens of the plug and the cartridge such that the cartridge, plug, and pusher member are advanceable from a proximal position on the positioning member to a distal position wherein the plug is disposed adjacent the positioning element; and cooperating elements on the pusher member and the positioning member that limit subsequent movement of the pusher member relative to the positioning member when the pusher member is advanced to the distal position, wherein the positioning member is removable through the pusher member with the positioning element collapsed, thereby allowing the positioning member to be withdrawn from a puncture before the pusher member is withdrawn such that pusher member prevents the plug from moving proximally while the positioning member is withdrawn. 2. The apparatus of claim 1, wherein the cooperating elements prevent the pusher member from being retracted proximally from the distal position. 3. The apparatus of claim 1, wherein the cooperating elements comprise first and second elements on the pusher member and the positioning member, the first element passing freely over the second element when the cartridge, plug, and pusher member are advanced to the distal position, the second element subsequently preventing the first element from passing proximally back over the second element, thereby preventing the pusher member from being retracted proximally from the distal position. 4. The apparatus of claim 3, wherein the first element comprises a latch element. 5. The apparatus of claim 4, wherein the second element comprises a raised element. 6. The apparatus of claim 1, wherein the plug is disposed immediately adjacent the positioning element in the distal position. 7. The apparatus of claim 1, wherein the cartridge is retractable relative to the pusher member, the pusher member comprising a distal end that prevents the plug from moving proximally while the cartridge is retracted. 8. The apparatus of claim 1, wherein the cooperating elements allow the pusher member to be directed distally from the distal position such that the plug may be compressed between the pusher member and the positioning element when the positioning element is expanded. 9. The apparatus of claim 1, wherein the plug is formed from a lyophilized hydrogel comprising hydrolytically degradable bonds, the hydrogel expanding when exposed to an aqueous physiological environment. 10. An apparatus for sealing a puncture extending through tissue, comprising: a cartridge comprising a proximal end, a distal end sized for insertion into a puncture through tissue, and a lumen extending between the proximal and distal ends; a plug disposed within the cartridge lumen, the plug comprising a lumen extending between proximal and distal ends thereof; a pusher member disposed within the cartridge lumen for preventing the plug from moving proximally when the cartridge is retracted proximally relative to the pusher member for deploying the plug from the cartridge; a positioning member comprising an elongate member and an expandable positioning element carried on a distal end of the elongate member, the elongate member received through the lumens of the plug and the cartridge such that the plug is disposed immediately adjacent the positioning element; and cooperating elements on the pusher member and the positioning member that prevent the pusher member from being retracted proximally relative to the positioning element, wherein the positioning member is removable through the pusher member with the positioning element collapsed, thereby allowing the positioning member to be withdrawn from a puncture before the pusher member is withdrawn such that pusher member prevents the plug from moving proximally while the positioning member is withdrawn. 11. The apparatus of claim 10, wherein the cooperating elements comprise first and second elements on the pusher member and the positioning member. 12. The apparatus of claim 11, wherein the first element comprises a latch element. 13. The apparatus of claim 12, wherein the second element comprises a raised element. 14. The apparatus of claim 10, wherein the cooperating elements allow the pusher member to be directed distally relative to the positioning element such that the plug may be compressed between the pusher member and the positioning element when the positioning element is expanded. 15. The apparatus of claim 10, wherein the plug is formed from a lyophilized hydrogel comprising hydrolytically degradable bonds, the hydrogel expanding when exposed to an aqueous physiological environment. 16. The apparatus of claim 10, wherein the plug comprises a folded sheet cylindrical shape. 17. The apparatus of claim 10, wherein the plug comprises an adherent layer on at least a portion of an exposed surface thereof, the adherent layer comprising a mixture of first and second hydrogel polymers that remain in an unreactive state until exposed to an aqueous physiological environment. 18. The device of claim 17, wherein the adherent layer further comprises a pH activating agent. 19. The apparatus of claim 10, wherein the hydrogel comprises PEG polymer.
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