Wound therapy system and related methods therefor

• US 9,974,890 B2
• Filed: 06/24/2016
• Issued: 05/22/2018
• Est. Priority Date: 05/21/2008
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Hudspeth, Michael D., Breitweiser, Kenneth M., Sisk, Ricky A., Dorsey, Michael C.
• Primary Examiner(s): Wiest, Philip R
• Application Number:
  US15/192,605
• Publication Number:
  US 20160325025A1
• Time in Patent Office: 697 Days
• CPC Class Codes: A61M 1/604 Bag or liner in a rigid container, with suction applied to both
• CPC Class Codes: A61M 1/742 by changing the size of a vent A61M1/7411 takes precedence
• CPC Class Codes: A61M 1/782 using valves with freely moving parts, e.g. float valves
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• CPC Class Codes: A61M 1/82 Membrane pumps, e.g. bulbs
• CPC Class Codes: A61M 1/913 having a bridging element for transferring the reduced pressure from the connector to the dressing
• CPC Class Codes: A61M 1/96 Suction control thereof
• CPC Class Codes: A61M 1/982 with means for detecting level of collected exudate
• CPC Class Codes: A61M 1/984 portable on the body
• CPC Class Codes: A61M 1/985 the dressing itself forming the collection container
• CPC Class Codes: A61M 2205/21 insensitive to tilting or inclination, e.g. spill-over prevention
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 2205/8293 Solar
• CPC Class Codes: A61M 2209/086 Docking stations
• CPC Class Codes: A61M 2209/088 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
• CPC Class Codes: A61M 39/24 Check- or non-return valves

Abstract

A portable system for subatmospheric pressure therapy in connection with healing a surgical wound, including a wound dressing dimensioned for positioning relative to a wound bed of a subject and a subatmospheric pressure mechanism dimensioned to be carried or worn by the subject. The subatmospheric pressure mechanism includes a housing having a control unit adapted to draw a vacuum and a canister associated with the housing. The canister has a collection bag disposed therein, which is in fluid communication with the wound dressing to receive exudates from the wound bed. The collection bag is adapted to expand upon receipt of the fluids and has means to release gas from within the collection bag in connection with operation of the control unit. With this arrangement, the canister is attitude independent, i.e., the canister may be positioned on edge, on its side or on its end etc. while still maintaining operation of the control unit. The collection bag may include a hydrophobic vent or material for releasing the gases. In another embodiment, the collection bag comprises a gas permeable material. The collection bag may include one of pleats or bellows.

Claims

1. A system for treating a tissue site with reduced pressure, the system comprising:

a wound dressing for placing proximate to a tissue site;

a reduced-pressure source for providing reduced pressure; and

a container configured to be fluidly coupled to the reduced-pressure source and a sealed treatment space formed under the wound dressing;

wherein the container comprises;

an interior space;

a fluid inlet configured to be fluidly coupled to the sealed treatment space and the interior space;

a reduced-pressure inlet configured to be fluidly coupled to the reduced-pressure source and the interior space; and

a material adapted to allow gases to egress from the interior space separately from the reduced-pressure inlet while retaining liquids and maintaining reduced pressure; and

wherein the container comprises a flexible pouch formed substantially from the material adapted to allow gases to egress from the interior space.

2. The system of claim 1, wherein the wound dressing comprises a wound filler for placing proximate to the tissue site.

3. The system of claim 1, wherein the wound dressing comprises a porous member for placing proximate to the tissue site.

4. The system of claim 3, further comprising a sealing member for forming a fluid seal over the porous member to form a sealed treatment space.

5. A container for receiving and processing body fluids, the container comprising:

an interior space;

a body fluid inlet fluidly coupled to the interior space;

a reduced-pressure inlet fluidly coupled to the interior space; and

a material adapted to allow gases to egress from the interior space separately from the reduced-pressure inlet while retaining liquids and maintaining reduced pressure; and

wherein the container comprises a housing that comprises a flexible pouch formed substantially from the material adapted to allow gases to egress from the interior space.

6. A method for processing body fluids from a patient, the method comprising:

causing the body fluids to enter into a container, wherein the container comprises;

an interior space;

a body fluid inlet fluidly coupled to the interior space;

a reduced-pressure inlet fluidly coupled to the interior space;

a material adapted to allow gases to egress from the interior space separately from the reduced-pressure inlet while retaining liquids and maintaining reduced pressure; and

wherein the container comprises a housing that comprises a flexible pouch formed substantially from the material adapted to allow gases to egress from the interior space; and

permitting gases from the body fluids in the interior space to be evaporated and removed from the container using the material.