Closed wound drainage system

• US 20050261643A1
• Filed: 07/21/2005
• Published: 11/24/2005
• Est. Priority Date: 09/13/2002
• Status: Active Grant

• Current Assignee: Convatec Limited (ConvaTec Group Plc)
• Original Assignee: Neogen Technologies, LLC
• Inventors: Biggie, Lydia B., Biggie, John J., Dawson, John A., Bybordi, Farhad
• Granted Patent: US 7,731,702 B2
• Time in Patent Office: Days
• US Class Current: 604/313
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/916 specially adapted for deep wounds
• CPC Class Codes: A61M 1/92 with liquid supply means
• CPC Class Codes: A61M 1/94 with gas supply means
• CPC Class Codes: A61M 1/984 portable on the body
• CPC Class Codes: A61M 27/00 Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202

Abstract

A portable closed wound drainage system that uses a pouch shaped dressing which is inserted into a wound. At least a portion of the outer surface of the pouch is porous to allow exudates to enter. Exudates are removed from the pouch by flexible tubing which is secured inside the pouch at one end, and secured at the other end to a portable drain/suction unit. The pouch contains porous material, and may optionally contain beads and fillers which are antibacterial in nature. The tubing can have a single or multi-lumen structure with perforations in the side walls of the end of the tube that is inserted in the pouch to allow body fluids to enter laterally. The portable drain/suction unit is preferably a portable battery powered device. The pouch and the tube are sealed by a flexible sealing material which is applied to the outer surface of the skin around the periphery of the pouch and the tubing as it exits the pouch. This sealing material is preferably a hydro-colloid, a silicone, or a lyogel, such as a hydrogel, which are easily deformable. A cosmetic cover sheet is attached to the patient'"'"'s skin over the closed wound drainage system.

Claims

1-20. -20. (canceled)

21. A closed wound dressing system comprising:

a layer of gel for application to an upper surface of a wound area and forming a cavity open to a wound adjacent a lower surface of the gel layer, the gel layer being sized to cover and extend beyond the upper surface of the wound area for attachment to healthy skin outside the wound area, the lower surface of the gel layer being adapted to adhere to the healthy skin around the wound, and

tubing having an inner conduit, a distal end and a proximal end, the distal end of the tubing opening into the cavity, the tubing being adapted for connection to a vacuum source to produce a reduced pressure in the cavity.

22. The closed wound dressing system of claim 21 which includes a porous material extending across the opening to the cavity below the distal end of the tubing so that material drawn from the wound into the tubing passes through the porous material.

23. The closed wound dressing system of claim 21 wherein the vacuum source is connected to the proximal end of the tubing and a container is connected to the tubing between the gel layer and the vacuum source to accept material drawn into the tubing from the wound.

24. The closed wound dressing system of claim 21 wherein the gel layer includes at least one material selected from hydro-colloids, silicones, lyogels and hydrogel.

25. The closed wound dressing system of claim 21 wherein the gel layer is flexible.

26. The closed wound dressing system of claim 21 which includes a protective cover sheet attached to an outer surface of the gel layer.

27. The closed wound dressing system of claim 21 wherein the tubing further comprises at least a first lumen and a second lumen, at least one of the lumens being used to apply vacuum pressure to the wound area.

28. The closed wound dressing system of claim 27 wherein the first lumen applies vacuum pressure to the wound area and the second lumen delivers medication to the wound area.

29. The closed wound dressing system of claim 21 wherein the tubing includes one or more perforations adapted to draw material from the wound.

30. A method of draining a wound, comprising:

applying to an upper surface of a wound area a layer of gel forming a cavity open to a wound adjacent a lower surface of the gel layer, the gel layer covering and extending beyond the upper surface of the wound area and being adapted to adhere to healthy skin outside the wound area, the cavity communicating with tubing having an inner conduit, a distal end and a proximal end,

applying a reduced pressure to the inner conduit to draw material from the wound into the tubing, and

collecting material drawn into the tubing from the wound in a container connected to a proximal end portion of the tubing.

31. The method of claim 30 which includes a porous material extending across the opening to the cavity below the distal end of the tubing so that material drawn from a wound into the tubing passes through the porous material.

32. The method of claim 30 which includes a vacuum source connected to the proximal end of the tubing and a container connected to the tubing between the gel layer and the vacuum source to accept material drawn into the tubing from the wound.

33. The method of claim 30 wherein the gel layer includes at least one material selected from hydro-colloids, silicones, lyogels and hydrogel.

34. The method of claim 30 wherein the gel layer is flexible.

35. The method of claim 30 wherein a protective cover sheet is attached to an outer surface of the gel layer.

36. The method of claim 30 wherein the tubing further comprises at least a first lumen and a second lumen, at least one of the lumens being used to apply vacuum pressure to the wound area.

37. The method of claim 36 wherein the first lumen applies vacuum pressure to the wound area and the second lumen delivers medication to the wound area.

38. The method of claim 30 wherein the material is drawn from the wound through one or more perforations in the tubing.

39. A method of draining a wound, comprising:

applying a flexible gel to an upper surface of a wound cavity, the gel covering and extending beyond the upper surface of the wound cavity and being adapted to adhere to healthy skin outside the wound cavity, the wound cavity communicating with tubing having an inner conduit, a distal end and a proximal end,

applying a reduced pressure to the inner conduit to draw material from the wound cavity into the tubing, and

collecting material drawn into the tubing from the wound cavity in a container connected to a proximal end portion of the tubing.

40. The method of claim 39 wherein the gel is substantially impermeable to air.

41. The method of claim 39 wherein the gel is moisture permeable.