Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1989-07-11
1991-02-05
Isabella, David J.
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
A61B 1720
Patent
active
049901346
ABSTRACT:
An abrasive tipped rotating cutting tool for use in removing abnormal deposits within a patient's vessels is described. The tip is preferably covered with a material such as diamond grit, and rotated at high speed to pulverize any abnormal deposits contained within the vessel.
In a preferred embodiment of the invention, the tip is ellipsoidal in shape, and the coarseness of the abrasive material on the tip is varied from most coarse adjacent the distal end of the tip to finest adjacent the portion of the tip which has the widest diameter. Preferably, there is no abrasive on the widest part of the tip in order to prevent the tip from injuring a patient's vessel in the event that the tip is allowed to remain in one place for an extended period of time. In addition, there may be radial openings formed in the tip which permit water to be pumped therethrough in order to act as a lubricant for assisting in the cutting action of the tip.
The invention may use either an autraumatic tip or a preformable guide wire to guide the cutting tip through a patient's vessel.
REFERENCES:
patent: 3309772 (1967-03-01), Lieb et al.
patent: 3809093 (1984-05-01), Abraham
patent: 3892117 (1975-07-01), Nelson
patent: 3937222 (1976-02-01), Banko
patent: 4264307 (1981-04-01), Neuwirth
patent: 4445509 (1984-05-01), Auth
patent: 4591355 (1986-05-01), Hike
Catalog Cut, Teledyne Densco, Denver, Colo. 80207, 11/83.
Heart Technology, Inc.
Isabella David J.
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