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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0702068 (1996-08-23) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 299 인용 특허 : 0 |
The present invention provides a catheter apparatus, an introducer system, and a methodology for creating a bypass on-demand between an unobstructed blood vessel such as the aorta and an obstructed blood vessel such as an obstructed coronary artery in-vivo using a shaped memory alloy cuff and a graf
The present invention provides a catheter apparatus, an introducer system, and a methodology for creating a bypass on-demand between an unobstructed blood vessel such as the aorta and an obstructed blood vessel such as an obstructed coronary artery in-vivo using a shaped memory alloy cuff and a graft segment in tandem as a shunt. The invention allows the placement and creation of single or multiple bypass grafts without use of a heart-lung machine and without need for stopping the heart of the patient during the coronary artery bypass surgery.
[ What I claim is:] [1.] A catheter apparatus for creating a bypass on-demand between an unobstructed blood vessel and an obstructed blood vessel in-vivo using a graft segment as a conduit, said bypass catheter apparatus comprising:a catheter suitable for introduction into and extension through the
[ What I claim is:] [1.] A catheter apparatus for creating a bypass on-demand between an unobstructed blood vessel and an obstructed blood vessel in-vivo using a graft segment as a conduit, said bypass catheter apparatus comprising:a catheter suitable for introduction into and extension through the body in-vivo to a chosen site wherein an unobstructed blood vessel is in anatomic proximity to an obstruction lying within another blood vessel, said catheter being comprised of a hollow tube of fixed axial length having a proximal end, a distal end, and at least one internal lumen of predetermined diameter;an obturator for on-demand introduction and passage through said catheter to a chosen site on the unobstructed blood vessel in-vivo, said obturator comprising(1) a puncturing headpiece for puncture of and entry into the lumen of an unobstructed blood vessel,(2) a perforating end tip on said puncturing headpiece to facilitate the perforation of a blood vessel wall at the chosen site in-vivo,(3) an elongated shaft of fixed axial length integrated with said puncturing headpiece, said elongated shaft being configured for the carrying and transport of a graft segment within said internal lumen of said catheter to the chosen site on the unobstructed blood vessel in-vivo; anda thermoelastic deformable cuff comprised of a prepared shape-memory allow for positioning over said elongated shaft adjacent to said puncturing headpiece of said obturator together with a graft segment(i) wherein, prior to the perforation of the unobstructed blood vessel in-vivo by said puncturing headpiece of said obturator, a portion of said cuff in a first shaped configuration has been engaged and joined to one end of the graft segment then carried by said elongated shaft of said obturator thereby forming an engaged cuff portion and a non-engaged cuff portion,(ii) and wherein, after the perforation of the unobstructed blood vessel in-vivo by said puncturing headpiece of said obturator, at least part of said non-engaged cuff portion is extended into the lumen of the unobstructed blood vessel and becomes thermoelastically deformed in-situ into a prepared memory-shaped second configuration, and said prepared memory-shaped second configuration of said deformed non-engaged cuff portion becomes disposed onto an interior surface of the unobstructed blood vessel,(iii) and whereby said cuff engaged end of the graft segment become secured to and placed in blood flow communication with the unobstructed blood vessel and serves as a conduit means for bypassing an obstruction and restoring blood flow from the unobstructed blood vessel to the obstructed blood vessel to the obstructed blood vessel.
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