Circular hole forming apparatus
US5827288A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1997 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Apr 10, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/1695
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical guide tool has an axis and a cylindrical housing with a central bore, an upper cylindrical wall and a flange that are aligned with the axis. The tool has adjustable legs with a sharp conical point and a guide disk with a cylindrical body that lands within the wall. The guide disk has an eccentric bore that extends through the guide disk. A cylindrical cap encloses the guide disk within the tool. The upper end of the guide disk protrudes through a central hole in the cap and a lever is secured to the upper end of the guide disk. The guide disk is free to rotate within the tool. After a starter hole is made in a human skull, the tool is placed over the starter hole with the legs landing on the skull. A conventional surgical cutting implement with a footed attachment is inserted into the guide disk bore. The footed attachment is placed in the starter hole beneath the skull. The surgeon applies a tangential force to the lever to rotate the guide disk and implement within the tool around the axis so that a cranial flap is made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.