Surgery – Instruments – Blood vessel – duct or teat cutter – scrapper or abrader
Patent
1995-06-07
2000-07-04
Buiz, Michael
Surgery
Instruments
Blood vessel, duct or teat cutter, scrapper or abrader
606170, 606180, A61B 1732
Patent
active
RE0367648
ABSTRACT:
A device for removing obstructions from vessels or small openings in the body, comprising a rotatable ablator tip which is guided to the obstruction in a reduced diameter configuration, expanded and rotated to remove the obstruction, and contracted to remove the device from the body. The variably expandable abrasive tip coil in one embodiment of the invention is actuated by a piston means disposed within the coil. A pair of collars is attached to the ends of the coil, and the piston effects relative longitudinal axial movement of the collars and, hence, the respective ends of the coil tip. When the ends of the coil tip are so moved with respect to one another, expansion and contraction of the diameter of the coil tip results. In another embodiment of the invention, the expansion tip coil is actuated by an expandable and contractible bellows means disposed within the coil, instead of the piston means. In another embodiment of the invention, the expansion and contraction of the coil tip are effected by longitudinal axial movement of an internal coil attached to one end of the coil tip, within an outer coil attached to the other end of the coil tip. In another embodiment of the invention, expansion and contraction of the coil tip are effected by an inflatable balloon disposed within the coil tip. The balloon expansion means enlarges preferably at the central portion of the coil to make a bulge.
The questions raised in reexamination request No. 90/003,360, filed Mar. 15, 1994, and 90/003,723 filed Feb. 14, 1995, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e).
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Rotational Angioplasty System for Coronary Use Only; ROTABLATOR.RTM. Operations Manual; Heart Technology, Inc.; Copyright 1990, 1991, 1992, 1993; (pp. 1-48).
Jasso Martin R.
Zacca Nadim M.
Buiz Michael
Lewis William
Zacca Nadim M.
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