Surgery – Instruments – Means for inserting or removing conduit within body
Patent
1997-03-31
1998-08-11
Buiz, Michael
Surgery
Instruments
Means for inserting or removing conduit within body
606194, A61M 2900
Patent
active
057921440
ABSTRACT:
The present invention is a stent delivery catheter system for placing a stent within a stenosis in a vessel of a human body. The stent delivery catheter system utilizes a slideable sheath with a thin-walled distal portion that is situated coaxially over a stent that is placed onto a balloon located at the distal portion of a balloon angioplasty catheter. The distal end of a central portion of the sheath has an interior shoulder which is capable of exerting a distally directed push force on the balloon angioplasty catheter at a point that is just proximal to the stent. This push force is then transferred through the non-deployed stent to a gradually tapered, highly flexible, lubricity coated distal tip of the balloon angioplasty catheter. The structure of a continuous outer surface extending backward from the distal tip and onto the distal section of the sheath, plus the lubricity coating of the outer surfaces of the distal tip and the sheath, plus the increased stent delivery catheter system pushability provided by the sheath and the stent itself makes it possible for the stent delivery catheter system to be pushed through even very tight stenoses.
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patent: 5192297 (1993-03-01), Hull
patent: 5344426 (1994-09-01), Lau et al.
patent: 5639274 (1997-06-01), Fischell et al.
Fischell David R.
Fischell Robert E.
Fischell Tim A.
Buiz Michael
Cathco, Inc.
Truong Kevin
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