Rotationally expandable atherectomy cutter assembly
US5192291A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1992 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Jan 13, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/320725
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.