Expandable and compressible atherectomy cutter

Details Expandable and compressible atherectomy cutter Expandable and compressible atherectomy cutter

1995-04-27

1996-09-17

Buiz, Michael Powell

Surgery

Instruments

Cutting, puncturing or piercing

606159, A61B 1714, A61B 1722

Patent

active

055564089

ABSTRACT:
An expandable and compressible atherectomy cutter for cutting plaque from a stenosis includes a distal hub and a proximal hub joined by a plurality of resilient blades. The blades are shaped to describe a cutting radius which may be compressed to allow the cutter to be inserted into a guide catheter during insertion and removal of the cutter from the patient. The proximal hub is attached to the distal end of a torque tube. A conically-shaped, flexible funnel extends distally from the distal end of the torque tube with the resilient blades located partially within the funnel. In use, the cutter is rotated and advanced to clear a stenosis in a vessel of a patient. At the same time, fluid is withdrawn from the torque tube causing debris to be gathered through the funnel and removed from the patient. Debris removal is enhanced by the channeling effect of the funnel.

REFERENCES:
patent: 4966604 (1990-10-01), Reiss
patent: 5395311 (1995-03-01), Andrews

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