Vessel harvesting method and instrument including access port

  • US 5,916,233 A
  • Filed: 03/05/1998
  • Issued: 06/29/1999
  • Est. Priority Date: 03/05/1998
  • Status: Expired due to Term
First Claim
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1. Surgical apparatus comprising:

  • an elongated cannula having a proximate end and a distal end, and including plural lumina extending within the cannula between the ends thereof;

    an endoscope disposed within one of the plural lumina and extending from an eyepiece near the proximal end to a viewport near the distal end;

    a dissection tip attached to the distal end of the cannula substantially about the outer perimeter thereof and including a transparent tapered tip attached thereto in alignment with the viewport of the endoscope in said one of the plural lumina to permit visualization through the transparent tip within a field of view forward thereof, the dissection tip including an access port aligned with another of said plural lumina to permit protrusion therethrough of a surgical instrument into said field of view forward of the transparent tapered tip in a position of alignment with the viewport of the endoscope, and wherein the transparent tapered tip includes substantially conical outer walls which converge from a rim that mates with the distal end of the cannula towards a rounded end, and includes inner substantially conical walls that converge from the rim to a sharp point that is substantially axially aligned with the rounded end on the outer walls to reduce visual distortion within said field of view.

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