Patent ID: 9259559
Filing Date: 2016-02-16
CPC Classification: A61F,A61M

Claim Text:
1. A pressure relief apparatus for a balloon dilation catheter including an inflation/deflation lumen for inflating and deflating the balloon comprising: a pressure relief port formed through a wall of the inflation/deflation lumen, the pressure relief port including 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 wherein the fluid tight seal formed by the pressure relief member fails when the pressure in the inflation/deflation lumen exceeds a predetermined pressure; and a splash guard positioned across the pressure relief port, the splash guard formed from a fluid permeable body defining a plurality of flow passages therethrough, the cross-sectional area of each of the flow passages being narrow relative to the cross-sectional area of the first and second passages such that fluid released from the inflation/deflation lumen upon failure of the pressure relief member flows through the flow passages of the splash guard whereby the splash guard partially obstructs fluid flow through the pressure relief port to prevent a direct uncontrolled release of the fluid through the pressure relief port, the fluid flowing through the splash guard to release pressure from the inflation/deflation lumen.