Rotationally expandable atherectomy cutter assembly
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United States of America Patent
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-
Mar 9, 1993
Grant Date -
N/A
app pub date -
Jan 13, 1992
filing date -
Jan 13, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotationally expandable atherectomy cutter assembly for cutting plaque from a stenosis in an artery includes a plurality of radially separated and axially aligned blade elements. The distal ends of each blade element are fixably connected to a hub and the proximal ends of each blade element slidably engage helical slots formed in a distally flared extension tube of the assembly. The extension tube is connectable to a rotatable catheter. The helical slots are oriented in a first direction such that contact of the cutter assembly with the plaque of the stenosis, in conjunction with a second direction rotation of the catheter causes the proximal ends of the blade assembly to slide distally along the helical slots thereby expanding the cutting radius of the cutter assembly.
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