Biopsy apparatus and methods of constructing and utilizing same

Abstract From the Canadian patent

An improved biopsy apparatus is disclosed. The apparatus comprises a hollow outer cannula within which is initially disposed a solid inner puncture trocar. In use a, biopsy sample is obtained from a patient by first inserting the outer cannula - trocar apparatus into the patient at a desired location. Thereafter, the solid inner initial puncture trocar is withdrawn from the outer cannula, while the outer cannula remains in place at the desired specimen location. A hollow inner cannula is then inserted into the outer cannula and upon, withdrawal of the inner cannula from the outer cannula the desired specimen is obtained within the hollow interior of the inner cannula. In accordance with a …