Patent ID: 8814899
Filing Date: 2014-08-26
Classification: A61M

Abstract:
1. A pressure relief apparatus for a balloon dilation catheter including a shaft having a dilation balloon attached to the distal end of the shaft and an inflation/deflation lumen for inflating and deflating the balloon comprising: a pressure relief port formed through the wall of the inflation/deflation lumen wherein fluid enters and leaves the inflation/deflation lumen via an inflation/deflation port, and wherein, the pressure relief port further comprises a first outwardly opening passage and a second passage in fluid communication with the first passage and extending inwardly from the first passage and opening into the inflation/deflation lumen, and wherein the cross-sectional area of the first passage is larger than the cross-sectional area of the second passage; a pressure relief member secured across the pressure relief port in the wall of the inflation/deflation lumen to form a fluid tight seal, enabling inflation of the dilation balloon with a substantially incompressible fluid provided through the inflation/deflation lumen; and wherein the fluid tight seal formed by the pressure relief member fails at a predetermined pressure to release pressure from the inflation/deflation lumen through the pressure relief port, and wherein the pressure relief member is operative to fail during inflation of the balloon when the pressure in the inflation/deflation lumen exceeds the predetermined pressure.