Endovascular surgery systems

Details Endovascular surgery systems Endovascular surgery systems

1992-12-16

1994-06-07

Aschenbrenner, Peter A.

Surgery

Instruments

Blood vessel, duct or teat cutter, scrapper or abrader

606170, 606180, 604 22, A61B 1732

Patent

active

053185765

ABSTRACT:
In order to remove a lesion constricting a vascular channel, such as arteries (1), a cutter (10) of oblong, and preferably ellipsoidal shape is provided by a plurality of flexible segments (15). The segments have cutting elements (20) in the form of cusps and mounds (25) distributed over their outwardly facing surfaces. The cutter is shortened axially between its distal (D) and proximal ends to radially expand it and present the cutting elements and mounds to the lesion. The mounds help to smoothen the inside of the vascular channel following cutting of the lesion material by the cutting elements. Reaming (reciprocal movement of the cutter) along the axis (11) of the channel or rotation of the cutter may be effected from a control unit (100) via a drive shaft 40 which encases a coaxial fluid/suction supply via pipes (60, 70) to the vicinity of the cutter. A guidewire (30), which may be in a sleeve (90) is also used for axial retraction of the segments to expand the cutter. The drive shaft, guide wire and supply are in a catheter (3).

REFERENCES:
patent: 4895778 (1990-01-01), Papantonakos
patent: 5030201 (1991-07-01), Palestrant
patent: 5100425 (1992-03-01), Fischell et al.
patent: 5152773 (1992-10-01), Redha
patent: 5154724 (1992-10-01), Andrews
patent: 5176693 (1993-01-01), Pannek, Jr.
patent: 5178625 (1993-01-01), Groshong
patent: 5192291 (1993-03-01), Pannek, Jr.
Endovascular Surgery: second edition; Samuel S. Ahn and Wesley S. Moore, editors; published by Saunders, Philadelphia, Pa.; 1992,; chapters 28-34, pp. 263-319.

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