Patent ID: 6129714
Filing Date: 2000-10-10
Classification: A61F,F16K,Y10T

Abstract:
A medico-surgical drainage unit comprising:(a) a fluid-tight bag of a material, a major portion of which is flexible, said bag having a top and a bottom, said bag having a liquid inlet and a gas outlet both situated at a top of said bag and, further, having a liquid outlet at a bottom thereof; and(b) a normally closed flutter valve having opposing lips, said flutter valve depending integrally from said liquid inlet, said flutter valve disposed internally to said bag within the flexible major portion thereof, said flutter valve including a longitudinally disposed wire between the opposing lips thereof,whereby potential back pressure of gas across said liquid inlet and into said catheter, caused by an excess of internal bag pressure, is minimized by a venting function of said flutter valve effected by said longitudinally disposed wire.