IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0300589
(2005-12-15)
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등록번호 |
US-8277465
(2012-10-02)
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발명자
/ 주소 |
- Beane, Richard M.
- Brown, John W.
- Crunkleton, James Alan
- Gammie, James S.
- Smith, Jr., Joseph L.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
30 |
초록
▼
The present invention provides a system and method for forming a side branch on a hollow vessel, such as the aorta. The side branch is preferably adapted to be connected to a connector conduit, but any other suitable use is also acceptable. The system comprises a graft including a side branch portio
The present invention provides a system and method for forming a side branch on a hollow vessel, such as the aorta. The side branch is preferably adapted to be connected to a connector conduit, but any other suitable use is also acceptable. The system comprises a graft including a side branch portion, and an applicator comprising a hole forming element adapted to form a hole in the wall of the vessel and an insertion element adapted to be inserted through the wall of the vessel, the insertion element comprising a retraction element adapted to enter into engagement with the graft. The hole forming element may comprise a cutting element adapted to cut a hole in the wall of the vessel, and a positioning element adapted to hold the position of the applicator relative to the vessel. The system further comprises a graft protection element adapted to prevent the graft from being damaged by the cutting element. In this case, the clamping element and the graft protection element may be the same element, for example, an expansion element, which may be expandable from an unexpanded state to fully expanded state and to a partially expanded state. The expansion element may be a balloon, which may be in the shape of a circular toroid, and may include a tension member that restricts the dimensions of the balloon. In addition, the expansion element may be an umbrella mechanism.
대표청구항
▼
1. A method for providing a tubular side branch on a hollow vessel, the method comprising: providing a graft comprising (i) a tubular structure comprising a first end, a second end and a side wall extending therebetween, and (ii) a tubular side branch comprising a first end, a second end and a subst
1. A method for providing a tubular side branch on a hollow vessel, the method comprising: providing a graft comprising (i) a tubular structure comprising a first end, a second end and a side wall extending therebetween, and (ii) a tubular side branch comprising a first end, a second end and a substantially fluid-impervious side wall extending therebetween, the first end of the tubular side branch being connected to the side wall of the tubular structure so that the interior of the tubular side branch is in fluid communication with the interior of the tubular structure, the second end of the tubular side branch comprising a grasp for engaging the second end of the tubular side branch, wherein the tubular side branch is disposed within the interior of the tubular structure, with the grasp of the tubular side branch extending out of the side wall of the tubular structure;providing an applicator comprising (i) an insertion element configured to be inserted through the side wall of a hollow vessel, the insertion element comprising a grasper for selectively engaging the grasp of the tubular side branch, and a retraction element for selectively applying a retraction force to the side wall of the hollow vessel from within the interior of the hollow vessel, and (ii) a cutting element in telescoping relation to the insertion element for selectively cutting through the side wall of a hollow vessel when the side wall of the hollow vessel is disposed between the retraction element and the cutting element;advancing the insertion element through the side wall of the hollow vessel so that the grasper and the retraction element are positioned within the hollow vessel, and advancing the graft within the interior of the hollow vessel so that the grasp of the graft is in the vicinity of the grasper of the insertion element;engaging the grasp of the graft with the grasper of the insertion element;advancing the cutting element against the outer surface of the side wall of the hollow vessel while the retraction element applies a retraction force against the inner surface of the side wall of the hollow vessel so as to form a hole in the side wall of the hollow vessel; andretracting the insertion element and the cutting element so as to draw the tubular side branch of the graft through the hole formed in the side wall of the hollow vessel. 2. The method of claim 1, wherein the cutting element is a cylindrical cutting blade. 3. The method of claim 2, wherein forming a hole in the side wall of the hollow vessel comprises pressing the cylindrical cutting blade into the side wall of the hollow vessel and applying torsional force to the cutting blade. 4. The method of claim 1 wherein the applicator further comprises a reaction element disposed in telescoping relation to the retraction element, and wherein the method further comprises positioning the side wall of the hollow vessel relative to the applicator, wherein the positioning step comprises: biasing the reaction element on the outer surface of the side wall of the hollow vessel;biasing the retraction element on the inner surface of the side wall of the hollow vessel; andholding the side wall of the hollow vessel between the reaction element and the retraction element. 5. The method of claim 1, wherein the retraction element is a balloon. 6. The method of claim 1, wherein the retraction element is made of a rigid material. 7. The method of claim 1, wherein the retraction element is adapted to prevent a tissue plug from entering the hollow vessel, the tissue plug comprising a portion of the side wall removed when the hole is formed in the hollow vessel. 8. The method of claim 1, further comprising positioning a graft protection element between the graft and the cutting element prior to forming a hole in the side wall of the hollow vessel. 9. The method of claim 8, wherein the retraction element comprises the graft protection element. 10. The method of claim 1, wherein the grasper comprises a hook. 11. The method of claim 1, wherein the grasper is radiopaque. 12. The method of claim 1, wherein the retraction element is positioned between the graft and the cutting element so as to protect the graft during the forming of the hole in the side wall of the hollow vessel. 13. The method of claim 12, wherein the retraction element is an expansion element. 14. The method of claim 13, wherein the expansion element is expandable from an unexpanded state to fully expanded state and to a partially expanded state. 15. The method of claim 14, further comprising expanding the expansion element from the unexpanded state to the fully expanded state to the partially expanded state in a sequential manner. 16. The method of claim 15, wherein the expansion element is a balloon and the step of expanding is carried out with a syringe in fluid communication with the balloon. 17. The method of claim 15, wherein the expansion element is an umbrella device and the step of expanding is carried out with a cylinder having a piston slideable therein and coupled to the umbrella device. 18. The method of claim 15, further comprising a sequencing means for carrying out the expansion of the expansion element from the unexpanded state to the fully expanded state to the partially expanded state in a sequential manner. 19. The method of claim 14, wherein, in the fully expanded state, the expansion element has an outer diameter larger than an outer diameter of the cutting element. 20. The method of claim 14, wherein, in the partially expanded state, the expansion element has an outer diameter that is less than an inner diameter of the cutting element and greater than an outer diameter of the retraction element to thereby position a tissue plug within the cutting element. 21. The method of claim 13, wherein the expansion element is a balloon. 22. The method of claim 21, wherein the balloon is in the shape of a circular toroid. 23. The method of claim 21, wherein one or more tension members restrict the dimensions of the balloon. 24. The method of claim 13, wherein the expansion element is an umbrella mechanism. 25. The method of claim 1, wherein the hollow vessel is the aorta. 26. The method of claim 1, wherein the insertion element further comprises a trocar for facilitating the step of advancing the insertion element through the side wall of the hollow vessel. 27. The method of claim 1, further comprising a sequencing means for carrying out the method. 28. The method of claim 27, wherein the sequencing means comprises a cam mechanism. 29. The method of claim 27, wherein the sequencing means comprises a gear mechanism. 30. The method of claim 27, wherein the sequencing means comprises at least one servo mechanism and a controller operatively coupled to the at least one servo mechanism. 31. The method of claim 30, wherein the controller comprises a microprocessor based device. 32. The method of claim 27, further comprising depressing a button operatively coupled to the sequencing means to activate the sequencing means. 33. The method of claim 27, wherein the sequencing means comprises means for causing the elements to assume the following states in seriatim; a) a first state where the insertion element is positioned within the hollow vessel;b) a second state where the graft is positioned within the interior of the hollow vessel;c) a third state in which the hole has been formed with the cutting element; andd) a fourth state in which the tubular side branch of the graft is withdrawn through the hole in the hollow vessel.
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