The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 1994
Filed:
Dec. 16, 1992
Walter M Plassche, Jr, Rochester, NY (US);
Armin K Weiss, Rochester, NY (US);
Other;
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).