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Virtual measurement tool for minimally invasive surgery

  • US 9,155,592 B2
  • Filed: 06/16/2009
  • Issued: 10/13/2015
  • Est. Priority Date: 06/16/2009
  • Status: Active Grant
First Claim
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1. A method for measuring a length along a tissue structure, the method comprising:

  • grasping a first three-dimensional (3-D) location on the tissue structure with a first grasping tool in response to a first command received at a first input command device operatively coupled using one or more processors to the first grasping tool so as to allow a system user to manipulate the first grasping tool control console;

    grasping a second 3-D location on the tissue structure with a second grasping tool in response to a second command received at a second input command device operatively coupled using the one or more processors to the second grasping tool so as to allow a system user to manipulate the second grasping tool;

    configuring the one or more processors to measure, using the one or more processors, three dimensional distances between grasped locations of the tissue structure during hand-over-hand sampling;

    with the one or more processors, measuring a first three dimensional distance between the first 3-D location and the second 3-D location so as to provide a first three dimensional distance measurement;

    releasing the first grasping tool from grasping the first 3-D location and then grasping a third 3-D location on the tissue structure with the first grasping tool in response to a third command received at the first input command device, the first, second, and third 3-D locations being in sequence along the tissue structure;

    with the one or more processors, measuring a second three dimensional distance between the second 3-D location and the third 3-D location so as to provide a second three dimensional distance measurement; and

    with the one or more processors, outputting a sum of the measured first and second three dimensional distances;

    wherein the tissue structure comprises a tissue structure within a minimally invasive surgical site; and

    further comprising;

    grasping a sequence of additional tissue structure locations by alternately moving the first and second grasping tools and grasping the tissue structure alternatingly with the first and second grasping tools in response to commands received at the first and second input command devices;

    configuring the one or more processors to process stereoscopic image data; and

    with the one or more processors, receiving stereoscopic image data comprising left and right stereoscopic images of the tissue structure and of the first and second grasping tools from an image capture device and outputting to a display an image of the tissue structure and of the first and second grasping tools;

    wherein the image is outputted in real time in the course of movement of the first and second grasping tools; and

    wherein the image includes an image of a stretch line that is superimposed on the image of the tissue structure from a prior grasped tissue location to a currently grasping grasping tool.

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