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Force sensing for surgical instruments

  • US 8,613,230 B2
  • Filed: 01/07/2013
  • Issued: 12/24/2013
  • Est. Priority Date: 12/30/2005
  • Status: Active Grant
First Claim
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1. A cannula, comprising:

  • a proximal portion including an opening and a distal end, the opening of the proximal portion being configured to receive an instrument shaft, and the proximal portion being configured to operably couple to a manipulator arm;

    a tubular member extending from the distal end of the proximal portion, the tubular member including an inner surface and an opening, the opening of the tubular member being configured to receive the instrument shaft; and

    an annular rib extending radially inward from the inner surface of the tubular member.

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