Back to results
US 4,392,860 AGranted
Disposable wound drainage device
AssigneeHowmedica, Inc.
InventorsCharles M. Huck, John E. Studer, Philip H. Sauer
Life of this patent
Estimating the term…
Abstract
A device for removing fluids from a wound. The device includes a housing having therein an expandable and collapsible passive member which divides the interior of the housing into a first and a second chamber. A vacuum is applied to the second chamber to draw the passive member so as to increase the volume of the first chamber and create a negative pressure therein. Conventional wound tubing connected to the first chamber permits fluids to be drawn from the wound into the first chamber. In one exemplary embodiment a bellows is placed in communication with the second chamber.
Claims14
A device for removal of exudate from a wound comprising:
- a. a housing having a first end and a second end, side walls and end walls at each of the first and the second ends, said housing defining a generally enclosed chamber, each end having an opening for communicating with said chamber;
- b. a collapsible passive non-elastic member means expandable to its original extended state having a peripheral edge and being both airtight and watertight, said passive member means being disposed within the housing and sealingly connected at its periphery adjacent proximal to the second end of the housing so as to separate the interior of the housing chamber into a first chamber portion communicating with said first end wall opening and a second chamber portion communicating with said second end wall opening, said passive member means being configured and dimensioned such that when it is substantially expanded toward the first end wall it substantially conforms to the configuration of the inside of the side walls of the housing;
- and
- c. bellows means disposed outside of the walls of said housing and coupled to the second end wall opening for decreasing the pressure within said second chamber portion solely by said means so as to draw and collapse the passive member means toward the second end of the housing such that the volume of the first chamber portion is increased and a negative pressure is created therein.
1 more element
A device for removal of exudate from a portion of a living body comprising:
- a. a housing having a first end and a second end, said housing having side walls and end walls at each of the first and the second ends, said housing defining a generally enclosed interior, each end having an opening for communicating with said interior;
- b. a collapsible airtight and watertight passive non-elastic member means expandable to its original extended state having a peripheral edge, said passive member means being positioned within the housing and sealingly connected at its peripheral edge adjacent generally to the second end of the housing so as to separate the interior of the housing into a first chamber communicating with said first end opening and a second chamber communicating with said second end opening, said passive member means being configured and dimensioned such that when it is substantially expanded toward the first end wall it substantially conforms to the configuration of the inside of the side walls of the housing;
- c. a conduit communicating at one end thereof with the second end opening;
- d. a bellows positioned outside of the walls of said housing and in communication with the other end of said conduit such that selective compression and expansion of the bellows produces a suction force for drawing the passive member means toward the second end of the housing solely by said suction force such that the volume of the first chamber is increased and a negative pressure created therein;
- e. a first one-way valve positioned within said conduit so as to permit evacuation of the second chamber upon expansion of the bellows and to seal the second chamber during selective compression of the bellows;
- f. a second one-way valve coupled with the conduit so as to permit evacuation of the bellows during compression thereof;
- and
- g. conduit means communicating with said first opening and also with the portion of a living body so as to permit the drawing of fluids therefrom as a result of the suction created by the negative pressure of the first chamber.
5 more elements
Dependencies are inferred from the claim text.