Catheter apparatus employing shape memory alloy structures

Details Catheter apparatus employing shape memory alloy structures Catheter apparatus employing shape memory alloy structures

1988-08-18

1990-04-24

Pellegrino, Stephen C.

Surgery

Instruments

Blood vessel, duct or teat cutter, scrapper or abrader

604281, 606170, 606180, A61B 1732

Patent

active

049191330

ABSTRACT:
An improved catheter of the type used for mechanically removing arterial plaque employs shape memory alloy structures in the form of an integral portion of the catheter housing for compression against the artery wall and storage of pieces of plaque and at least one actuatable door for selectively opening and closing a window in the housing. The shape memory alloy material is heated by a remotely located current source connected to the catheter by conductors for selective activation of the alloy for a reversible change in shape such as expansion and elongation.

REFERENCES:
patent: 4170990 (1979-10-01), Baumgart et al.
patent: 4461305 (1984-07-01), Cibley
patent: 4655171 (1987-04-01), Wallsten
patent: 4665906 (1987-05-01), Jervis
patent: 4685458 (1987-08-01), Leckrone
patent: 4781186 (1988-11-01), Simpson et al.

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