Surgery – Instruments – Blood vessel – duct or teat cutter – scrapper or abrader
Patent
1991-12-10
1994-05-03
Burr, Edgar S.
Surgery
Instruments
Blood vessel, duct or teat cutter, scrapper or abrader
606170, 606180, 606194, A61B 1732
Patent
active
053083547
ABSTRACT:
A device for treating obstructions in 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 is actuated by piston means 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 the respective ends of the coil tip. When the ends of the coil tip are so moved, expansion and contraction of the diameter of the coil tip results. In another embodiment, the expansion tip coil is actuated by an expandable and contractible bellows disposed within the coil. In another embodiment, 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 its other end. In another embodiment, 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. In alternative embodiments, there is provided a combined atherectomy and balloon angioplasty device employing either a fixed or variable diameter rotatable abrasive burr, and an angioplasty balloon disposed proximal to the burr.
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Jasso Martin R.
Zacca Nadim M.
Burr Edgar S.
Shull William E.
Yan Ren
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