Patent ID: 6203557
Filing Date: 2001-03-20
Classification: A61B

Abstract:
A cannula for dissecting an elongated cavity in tissue, the cannula comprising:a tubular body having a proximal end and a distal end and having a lumen extending within the length of the tubular body;an endoscope having a lighted, viewing end disposed in the lumen near the distal end of the tubular body;a transparent member affixed to the distal end of the tubular body, having a tapered section and having a blunt tip, the tapered section and the blunt tip have different radii of curvature; anda sleeve-type balloon having proximal and distal ends circumferentially attached to an exterior wall of the tubular body near the distal end thereof and proximal of the transparent member, wherein the tubular body supports the balloon when deflated.