Closed wound drainage system

• US 7,731,702 B2
• Filed: 07/21/2005
• Issued: 06/08/2010
• Est. Priority Date: 09/13/2002
• Status: Expired due to Fees

• Current Assignee: Convatec Limited (ConvaTec Group Plc)
• Original Assignee: Neogen Technologies, Inc.
• Inventors: Bybordi, Farhad, Biggie, Lydia B., Biggie, John J., Dawson, John A.
• Primary Examiner(s): Zalukaeva; Tatyana
• Assistant Examiner(s): Treyger; Ilya Y
• Application Number:
  US11/186,056
• Publication Number:
  US 20050261643A1
• Time in Patent Office: 1,783 Days
• Field of Search: 604/289, 604/290, 604/304, 604/305, 604/313, 604/315, 604/316, 604/540, 604/543, 604/317, 604/319, 604/322, 604/327, 604/332, 604/334, 604/336, 604/356, 601 6- 14
• 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. The tubing can have a single or multi-lumen structure. The pouch and the tube are sealed by a flexible sealing material which is applied to the outer surface of the skin. A cosmetic cover sheet is attached to the patient'"'"'s skin over the closed wound drainage system.

Claims

1. A method of draining a wound, comprising:

applying a self-adhering covering of moisture permeable gel without the use of an additional adhesive to a healthy skin surface outside of a wound area to form a wound cavity, the gel covering extending over the wound area without extending into the wound area, the gel covering adhering to the healthy skin surface outside the wound area, the gel covering remaining above the healthy skin surface without extending below the healthy skin surface, the wound cavity communicating with tubing having an inner conduit, a distal end and a proximal end,

applying a porous material extending across an opening to the wound cavity below the distal end of the tubing so that material drawn from a wound into the tubing passes through the porous material,

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.

2. The method of claim 1 wherein the gel covering includes at least one material selected from hydro-colloids, lyogels and hydrogel.

3. The method of claim 1 wherein the gel covering is flexible.

4. The method of claim 1 further comprising the act of attaching a protective cover sheet to an outer surface of the gel covering.

5. The method of claim 1 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.

6. The method of claim 5 wherein the first lumen applies vacuum pressure to the wound area and the second lumen delivers medication to the wound area.

7. The method of claim 1 wherein the material is drawn from the wound through one or more perforations in the tubing.

8. The method of claim 1, wherein the gel covering forms an impermeable seal with the healthy skin surface outside the wound area.

9. A method of draining a wound, comprising:

applying a self-adhering covering of moisture permeable gel without the use of an additional adhesive to a healthy skin surface outside of a wound area to form a wound cavity, the gel covering extending over the wound area without extending into the wound area, the gel covering adhering to the healthy skin surface outside the wound area, the gel covering remaining above the healthy skin surface without extending below the healthy skin surface, 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 into the tubing, wherein the act of applying reduced pressure is accomplished with a vacuum source connected to the proximal end of the tubing and a container connected to the tubing between the gel covering and the vacuum source to accept material drawn into the tubing from the wound, and

collecting material drawn into the tubing from the wound within the container.

10. The method of claim 9 wherein the gel covering is a moisture permeable hydro-colloid, lyogel or hydrogel.

11. The method of claim 9 wherein the gel covering is substantially impermeable to air.

12. A method of draining a wound, comprising:

applying a self-adhering covering of moisture permeable gel without the use of an additional adhesive to a healthy skin surface outside of a wound area to form a wound cavity, the gel covering extending over the wound area without extending into the wound area, the gel covering adhering to the healthy skin surface outside the wound area, the gel covering remaining above the healthy skin surface without extending below the healthy skin surface, the wound cavity communicating with tubing having an inner conduit, a distal end and a proximal end,

applying a dressing inside the wound cavity and below the gel covering,

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.

13. The method of claim 12 wherein the gel covering is substantially impermeable to air.

14. The method of claim 12 wherein the gel covering is a moisture permeable hydro-colloid, lyogel or hydrogel.

15. The method of claim 12, wherein the dressing is a deformable pouch.

16. A method of draining a wound, comprising:

sealing a self adhering, flexible, moisture permeable gel covering without the use of an additional adhesive to a healthy skin surface outside of a wound area, the gel covering extending over an upper surface of the wound area, the gel covering remaining above the healthy skin surface without extending below the healthy skin surface for surface application over the wound area, the wound area including a wound cavity, the wound cavity communicating with tubing having an inner conduit, a distal end and a proximal end,

applying a dressing inside the wound cavity and below the gel covering,

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.

17. The method of claim 16 wherein the gel includes at least one material selected from hydro-colloids, lyogels and hydrogel.

18. The method of claim 16 further comprising the act of attaching a protective cover sheet to an upper surface of the gel covering.

19. The method of claim 16 wherein the dressing inside the wound cavity and below the gel covering is a porous material.

20. The method of claim 16 wherein the gel covering is substantially impermeable to air.