Biopsy guide

Details Biopsy guide Biopsy guide

1987-05-19

1989-03-07

Thaler, Michael H.

Surgery

Truss

Pad

A61B 1700

Patent

active

048096946

ABSTRACT:
A guide for a medical instrument includes a cranial tap having a threaded end adapted to be secured into the skull of a patient, a spherical member having a passageway extending diametrically through it for receiving an instrument employed in a surgical procedure, and retaining structure attachable to the tap to immobilize the spherical member in a desired orientation within the tap, characterized in that the retaining structure includes first and second threaded members secured to the tap in different locations for engaging the spherical member in different locations to thereby retain the spherical member against movement within the tap. In a preferred embodiment of the invention the spherical member is deformable and one of the threaded members locally deforms the passageway extending diametrically through the spherical member to cause a surface of the passageway to frictionally engage an instrument extending through the passageway, and thereby prevent axial movement of the instrument relative to the spherical member.

REFERENCES:
patent: 3055370 (1962-09-01), McKinney et al.
patent: 3115140 (1963-12-01), Volkman

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