Bone biopsy needle

Details Bone biopsy needle Bone biopsy needle

1990-03-05

1991-08-20

Kamm, William E.

Surgery

Truss

Pad

606179, A61B 1000

Patent

active

050405420

ABSTRACT:
A bone biopsy instrument kit includes a hollow needle with an annular cutting edge which is rotated to cut a core of bone sample which is retained in the internal passage of the needle. A semi-circular portion of the needle wall is removable to withdraw the core sample without compressing or otherwise changing the consistency of the sample. The annular cutting edge has a sawtooth configuration with a side rake angle causing bone dust to be expelled radially without contaminating the core sample. An elongated obturator and an elongated trocar may be inserted through the needle to direct the annular cutting edge through tissue and to center and guide the instrument into the surface of the bone.

REFERENCES:
patent: 1167014 (1916-01-01), O'Brien
patent: 2505358 (1949-04-01), Gusberg et al.
patent: 4798213 (1989-01-01), Doppelt

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