Goniometer for needle placement
US5196019A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Oct 4, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/068
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A goniometer for needle placement in connection with a computer tomograph to direct a needle at a proper angle to reach an area for biopsy or other surgical procedures in the human body. One embodiment of the device includes a double ring, the outer ring having arcuate graduations and a level mounted thereon, and the inner ring being rotatable in the outer ring to various angle positions and including a needle carrier for receiving a needle holder. The outer ring has serrations on a continuous arcuate surface and the inner ring has resilient detents to contact and rid on the serrations. A lever operated needle holder has a cam to lock a detent into a serration when the needle holder is moved to a position to retain a needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.