Counter rotating biopsy needle

Details Counter rotating biopsy needle Counter rotating biopsy needle

A - Human Necessities

61

B

128/113

A61B 17/14 (2006.01) A61B 10/00 (2006.01) F16H 3/14 (2006.01)

Patent

CA 1156897

ABSTRACT OF THE DISCLOSURE A universally applicable biopsy needle includes two counter-rotating tubes having oppositely facing sawteeth formed on the distal ends thereof. A gear system transmits a driving force to the tubes, causing the counter-rotation which permits the sawteeth to act in a sawing manner for penetration of bone samples and in a cutting manner for soft tissues. Use of an outer cannula allows safe insertion of the needle to the location of the desired sample, and various grasping means are used to extract the sample core. The concentric, telescoping needles provide a sample preserving the natural architecture and orientation of the tissue or cell types, while minimizing harming and maceration of the same.

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