Surgery – Instruments – Blood vessel – duct or teat cutter – scrapper or abrader
Patent
1990-11-16
1992-07-28
Thaler, Michael H.
Surgery
Instruments
Blood vessel, duct or teat cutter, scrapper or abrader
606171, A61B 1732
Patent
active
051337258
ABSTRACT:
An adjustable intraluminal valvulotome comprises a hollow tubular member and a pair of substantially identical, opposed cutting blades provided at the distal end of the tubular member. Each of the cutting blades has a first cutting blade at its trailing edge and a second cutting blade at one side generally transverse to the first cutting blade. The outer faces of the cutting blades have a complex convex surface. The cutting blades are movable between an extended position and a retracted postion with respect to the distal end of the tubular member and between an open position in which the cutting blades are spaced apart from each other and a closed position in which said cutting blades are drawn tightly against each other, by the operation of a pair of spring wires respectively attached to the cutting blades and slidable within the tubular member. The distal end of the tubular member is provided with a receptacle for receiving the first cutting edges of the cutting blades in the retracted position. A coil spring can be provided within the tubular member, through which the spring wires pass, to facilitate movement of the cutting blades between their open and closed positions.
REFERENCES:
patent: 518600 (1894-04-01), Hallman
patent: 2655154 (1953-10-01), Richter
patent: 3404677 (1968-10-01), Springer
patent: 4200111 (1980-04-01), Harris
patent: 4655217 (1987-04-01), Reed
patent: 4768508 (1988-09-01), Chin et al.
patent: 5049154 (1991-09-01), Quadri
Berkshire Research and Development, Inc.
Thaler Michael H.
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