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Endoscopic tissue collecting instrument

  • US 6,572,563 B2
  • Filed: 12/19/2000
  • Issued: 06/03/2003
  • Est. Priority Date: 12/22/1999
  • Status: Expired due to Fees
First Claim
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1. An endoscopic tissue collecting instrument, comprising:

  • a needle shaft having a needle tip and a tissue retaining recess behind the needle tip; and

    an outer sheath slidably fitted over the needle shaft, said outer sheath having an outer circumferential portion and having a distal end defining a blade, a diameter of said outer circumferential portion being tapered at said distal end, said outer sheath configured to move relative to said needle shaft to cut off, with said blade, tissue retained in said retaining recess, at least a portion of said blade configured to generate a cutting force relative to both a longitudinal axis direction of the outer sheath and a circumferential direction thereof when said outer sheath is moved relative to said needle shaft to cut off, with said blade, tissue retained in said retaining recess.

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