Goniometer for needle placement

Details Goniometer for needle placement Goniometer for needle placement

1991-10-04

1993-03-23

Aschenbrenner, Peter A.

Surgery

Instruments

Stereotaxic device

378 81, 604264, A61B 1900

Patent

active

051960192

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.

REFERENCES:
patent: 3115140 (1963-12-01), Volkman
patent: 3839635 (1974-10-01), Chan et al.
patent: 4058114 (1977-11-01), Soldner
patent: 4230117 (1980-10-01), Anichkov
patent: 4534050 (1985-08-01), Smith
patent: 4608977 (1986-09-01), Brown
patent: 4846173 (1989-07-01), Davidson
patent: 5004457 (1991-04-01), Wyatt et al.
patent: 5030223 (1991-07-01), Anderson et al.
patent: 5053042 (1991-10-01), Bidwell

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