Muscle biopsy needle

Details Muscle biopsy needle Muscle biopsy needle

A - Human Necessities

61

M

128/93

A61M 5/32 (2006.01) A61B 10/00 (2006.01) A61B 17/34 (2006.01)

Patent

CA 1037807

ABSTRACT OF THE DISCLOSURE Means for obtaining muscle tissue specimens from a body and comprising a generally cylindrical shaft having a tapered and pointed distal puncturing and cutting tip, and with coaxially disposed sheath means having a sharpened forward cutting edge slidably enveloping the shaft. A sample receiving cavity is formed in the shaft and is provided with a generally sharpened hook in the forward portion of the cavity. The hook has a point directed toward the proximate end of the shaft and comprises an overhanging barb forming a portion of the sample retaining cavity. The sheath is slidable over the shaft between retracted and extended dispositions, with the forward edges of the sheath enclosing the barb when the sheath Is In its forward pre- determined disposition, and with the sharpened tip of the barb being exposed when the sheath is in retracted disposition. The forward sharpened cutting edge of the sheath forms a cutting edge which separates that portion of the sample retained within the sample receiving cavity from the bulk of the tissue, with the separation being in the form of a clean extraction cut. For removal of the sample, simple retraction of the device is possible.

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