Patent ID: 6338728
Filing Date: 2002-01-15
Classification: A61M

Abstract:
A drainage device comprising:a housing having front and back surfaces; at least two chambers in said housing and including a pressure regulation chamber and a collection chamber therein and said pressure regulation chamber and said collection chamber are fluidly coupled by means of a vent pathway; wherein the vent pathway includes an intermediate chamber and at least first and second passages, each passage being in fluid communication with the interior of the intermediate chamber; wherein an opening is provided in the first passage, distal from the intermediate chamber, to fluidly couple the first passage and the pressure regulation chamber; wherein an opening is provided in the second passage, distal from the intermediate chamber, to fluidly couple the second passage and the collection chamber; and a negative pressure indicator associated with the collection chamber to provide a visual indication of the existence of negative pressure within the collection chamber through the front surface of the housing and a suction pressure indicator associated with the pressure regulation chamber to indicate the existence of suction pressure in the pressure regulation chamber.