| 摘要 |
The disclosed biopsy device has a biopsy channel of constant cross section over its entire length connected to an aspiration and collecting chamber and at least one application channel of varying cross section connected to a dispensing chamber integrally connected with the aspiration chamber. At least one application channel is formed by a tube centrically slipped over the biopsy channel wall. In order to enable the collection of tissue specimens of an unchanged structure with the most careful handling possible of the tissue and the application of auxiliary substances into the puncture channel without tissue specimens getting into the application cannula and obstructing the same, the distal segment of the application channel forms a close fitting and concentric sheath around the biopsy channel. The biopsy channel wall projects out of the tube with its acute-angularly designed cutting edge and the tube end encloses an obtuse angle with the biopsy channel. The proximal end of the application channel has a larger diameter than the distal end allowing for unobstructed flow of the application material past the biopsy channel wall upon retraction of the biopsy channel from the distal segment of the application channel. The versatility of the invention permits its use in many applications, including, for example, liver biopsies, breast biopsies, laparoscopic surgery, and lymphadenectomy procedures.
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