Patent ID: 6352526
Filing Date: 2002-03-05
Classification: A61F,A61M,Y10T

Abstract:
A collection bag for fluids in combination with an improved anti-reflux valve in control by . . . , said valve formed as a folded-over flap having a front sheet and a rear sheet joined at a fold along an upper edge of each of said front and rear sheets, each of said front and rear sheets having a lower end, a left side edge, and a right side edge, said left side edges being sealed to one another by heat seals, said rear sheet having an aperture therein forming a fluid entry port, and said lower ends defining a distal opening of the anti-reflux valve, the improvement comprising:a channel extending from a height of said anti-reflux valve below said fluid entry port down to said distal opening, wherein the ratio of the length of said channel to the diameter of said distal opening is 3:1; wherein the rear sheet of said anti-reflux valve is adjacent a first wall of said collection bag and said collection bag includes an aperture coextensive with said fluid entry port, with a perimeter of said aperture and said fluid entry port being in a fluid-tight sealed relationship with one another; and wherein one or more spot welds are provided along said channel between said rear sheet of said anti-reflux valve and said first wall of said collection bag, whereby said channel is maintained in a straight orientation relative to said first wall of the collection bag.