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Medical device introduction and imaging system, and associated method

  • US 10,448,811 B2
  • Filed: 12/22/2017
  • Issued: 10/22/2019
  • Est. Priority Date: 01/16/2013
  • Status: Active Grant
First Claim
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1. A medical apparatus, comprising:

  • a disposable rigid outer sheath having a lumen extending from a distal end to a proximal end thereof and a rotational hub on the proximal end thereof, the outer sheath having an angled distal region and a proximal region, the angled distal region being angled at a non-zero angle relative to a longitudinal axis of the proximal region;

    a disposable elongate inner sheath being configured to be inserted into the outer sheath and having proximal and distal ends, the inner sheath being more flexible than the outer sheath such that the inner sheath bends to substantially coaxially align with the distal and proximal regions of the outer sheath, the inner sheath including at least four lumens, the at least four lumens including a working channel, a viewing channel, a fluid inflow channel, and a fluid outflow channel;

    the working channel extending between the proximal end of the inner sheath and an opening at the distal end of the inner sheath, the working channel being configured to receive a surgical tool therethrough from the proximal end of the inner sheath and to extend from the distal end of the inner sheath;

    the viewing channel extending between the proximal and distal ends of the inner sheath and configured to receive an imaging shaft of an imaging device;

    the fluid inflow and fluid outflow channels each defining a fluid passage therethrough and each extending proximally from the distal end of the inner sheath to a point at least partway along the inner sheath, the fluid inflow channel being configured to provide inflows of fluid for disposition in the body cavity, the fluid outflow channel being configured to receive outflows of fluid from the body cavity; and

    a securing hub on the proximal end of the inner sheath, the securing hub being configured to engage the inner sheath with the imaging device such that the inner sheath is rotationally fixed relative to the imaging device;

    wherein the rotational hub on the outer sheath is configured to engage the securing hub on the inner sheath when the inner sheath is disposed within the outer sheath and the imaging shaft is disposed within the inner sheath such that (i) the rotational hub is rotatable about the longitudinal axis of the proximal region relative to the securing hub and (ii) at least a distal-most end of the imaging shaft is angled at the non-zero angle of the outer sheath and disposed at or proximal to the distal ends of the inner and outer sheaths.

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