Patent ID: 8951277
Filing Date: 2015-02-10
Classification: A61B,A61M

Abstract:
1. A trocar for insertion through a tissue perforation, comprising: an elongate balloon having a proximal end and a distal end; the balloon having a toroid shape that forms a tubular channel throughout the length of the balloon; the tubular channel being connected to an outer body portion of the balloon at the distal end and at the proximal end; a cannula positioned inside of the balloon; the cannula having a proximal end, a distal end, and a longitudinal lumen; the balloon having a reduced portion located distal to the distal end of the cannula in a first low-profile condition such that the reduced portion has a diameter smaller than the diameter of the distal end of the cannula; the balloon having a second high-profile large diameter condition relative to the first condition; the second high-profile large diameter condition achieved by application of inflation pressure into the balloon; the balloon is adapted to expand from the first low-profile condition to the second high profile condition.