Atherectomy catheter having flexible nose cone

Details Atherectomy catheter having flexible nose cone Atherectomy catheter having flexible nose cone

1992-01-22

1993-10-05

Pellegrino, Stephen C.

Surgery

Instruments

Blood vessel, duct or teat cutter, scrapper or abrader

606170, 606171, 606180, 604 22, A61B 1732

Patent

active

052500594

ABSTRACT:
An atherectomy catheter comprises a flexible tube having a proximal end and a distal end, and a cutter housing secured to the proximal end. A spring tip nose cone is secured to a distal end of the cutter housing and comprises a relatively soft polymeric wall having a spring coil embedded therein. The spring tip nose cone has a controlled flexibility, generally being more flexible toward the distal tip. The spring coil inhibits collapse of the nose cone under the expected conditions of use, and the flexibility and non-collapsibility together assure that the nose cone can be introduced over a movable guide wire without substantial binding. Means may be provided for inhibiting loss of atheroma from the interior of the nose cone.

REFERENCES:
patent: Re33569 (1991-04-01), Gifford, III et al.
patent: 2211975 (1940-08-01), Hendrickson
patent: 4571240 (1986-02-01), Samson et al.
patent: 4582181 (1986-04-01), Samson
patent: 4597755 (1986-07-01), Samson et al.
patent: 4781186 (1988-11-01), Simpson et al.
patent: 4921483 (1990-05-01), Wijay et al.
patent: 4979951 (1990-12-01), Simpson
patent: 5078722 (1992-01-01), Stevens
patent: 5092873 (1992-03-01), Simpson et al.

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