Rotary surgical cutting instrument
US5423844A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1993 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Oct 22, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/32002
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A rotary surgical cutting instrument for use in cutting tissue within an anatomical space includes an outer cannula sized for percutaneous insertion into the anatomical space. The outer cannula defines a central bore along the length of the outer cannula and a cutting opening adjacent the distal end sized to receive tissue therethrough. A rotatably driven tubular cutting member is disposed within the central bore of the outer cannula, with a cutting edge rotating beneath the cutting opening of the cannula. The cutting edge extends at least substantially completely circumferentially around the tubular cutting head and circumscribes an angle relative to longitudinal and radial planes defined by the outer cannula. The cutting member can include a tubular cutting head and body portion that are connected by a hinge to permit pivoting of the cutting head relative to the body. The cutting member is formed from a flat sheet that is wound into a tubular shape within the outer cannula with opposite first and second edges adjacent each other. The cutting edge extends at an oblique angle between the first and second edges. The cutting edge is defined in the sheet at an oblique angle extending …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.