Surgical tubular cutter having a tapering cutting chamber
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United States of America Patent
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Apr 21, 1998
Grant Date -
N/A
app pub date -
Nov 13, 1996
filing date -
Nov 1, 1996
priority date (Note) -
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Abstract
The invention provides tubular surgical cutters having conical or tapering cutting chambers along substantially the entire length of their cutting apertures. Tissues which are drawn into such a conical chamber and severed from the adjacent tissue are quite easily drawn proximally for aspiration, substantially reducing the likelihood that they will clog the cutter mechanism. In some embodiments, an inner cutting tube having an orifice which is smaller than that of the outer cutting tube limits the size of tissue fragments entrained within the cutting chamber, further reducing the possibility that those fragments will clog the aspiration lumen and interrupt the tissue removal process.
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