# US 2019/0167861 A1 · Dressings, Systems, And Methods For Treating A Wound On A Patient's Limb Employing Liquid Control > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167861 A1 - Document ID: US20190167861A1 - Status: Published application - Kind: A1 - Application number: 16/212,366 - Filed: 2018-12-06 - Published: 2019-06-06 - Earliest claimed: 2011-11-11 - Applicants: KCI Licensing, Inc. - Inventors: Benjamin Andrew PRATT; Christopher Brian LOCKE - Web page: https://patentgrep.com/patent/US20190167861A1 ## CPC - A61F 13/05: specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT] - A61F 13/00063: {comprising medicaments or additives, e.g. odor control, PH control, debriding, antimicrobic (drug delivery dressings A61K9/70; chemical aspect of the additives A61L15/00)} - A61F 13/00987: {Apparatus or processes for manufacturing non-adhesive dressings or bandages} - A61F 13/022: {having more than one layer with different fluid retention characteristics} - A61F 13/08: Elastic stockings; for contracting aneurisms - A61F 13/085: {Openable readjustable} - A61F 13/45: characterised by the shape (cup-shaped type tampons A61F13/2045) - A61F 13/8405: {Additives, e.g. for odour, disinfectant or pH control} - A61M 1/74: {Suction control (underwater drainage A61M1/61)} - A61M 1/912: {Connectors between dressing and drainage tube} - A61M 1/918: {for multiple suction locations} - A61M 1/962: {having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction} - A61M 1/964: {having venting means on or near the dressing} - A61F 2013/00468: {applying local pressure} - A61F 2013/8408: {with odour control} - A61M 2205/7536: allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes - Y10T 29/49826: Assembling or joining - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Wound dressings, systems, and methods are presented for treating a wound on a patient's limb, such as a venous leg ulcer. The dressings, systems, and methods involve creating airflow within the dressing to vaporize and remove liquid. The airflow may begin when the dressing becomes saturated. The dressings may be used to provide compression and reduced pressure to the wound. Other systems, methods, and dressings are presented herein. ## Claims ### Claim at position 1 -33. (canceled) ### Claim 34 A system for treating a wound on a patient's limb, the system comprising: a wound dressing comprising a tubular sleeve member, the tubular sleeve member comprising a plurality of pressure compartments, wherein each pressure compartment of the plurality of pressure compartments is operable to form a pressure gradient on a portion of the patient's limb; a pressure source fluidly coupled separately to each pressure compartment of the plurality of pressure compartments; a controller coupled to the pressure source to control pressure delivery to the plurality of pressure compartments; and wherein the controller and pressure source are operable to cause a first pressure compartment of the plurality of pressure compartments to compress around the patient's limb, then subsequently a second pressure compartment of the plurality of pressure compartments to compress in order to encourage fluid movement in the patient's limb from proximate the first pressure compartment towards the second pressure compartment. ### Claim 35 A method for treating a wound on a patient's limb, the method comprising: forming a plurality of pressure compartments on the patient's limb proximate the wound; sequentially compressing each pressure compartment in a cephaladic direction; and flowing air over a majority of the pressure compartments to vaporize and remove liquid. ### Claim 36 (canceled) ### Claim 37 (depends on 34) The system of claim 34, wherein each pressure compartment of the plurality of pressure compartments is operable to form a pressure gradient to move air into the wound dressing. ### Claim 38 (depends on 34) The system of claim 34, further comprising a plurality of pressure conduits configured to fluidly couple the pressure source to the plurality of pressure compartments. ### Claim 39 (depends on 38) The system of claim 38, wherein each pressure compartment of the plurality of pressure compartments further comprises a pressure interface configured to fluidly couple the pressure compartment of the plurality of pressure compartments to a respective pressure conduit of the plurality of pressure conduits. ### Claim 40 (depends on 34) The system of claim 34, wherein the controller is configured to control a plurality of pumps within the pressure source to allow varying pressure within the plurality of pressure compartments. ### Claim 41 (depends on 34) The system of claim 34, wherein the controller is configured to control a plurality of valves to allow varying pressure within the plurality of pressure compartments. ### Claim 42 (depends on 34) The system of claim 34, wherein each pressure compartment of the plurality of pressure compartments further comprises a bladder configured to be fluidly coupled to the pressure source. ### Claim 43 A system for treating a wound on a patient's limb comprising: a tubular sleeve having a plurality of pressure compartments, each pressure compartment of the plurality of pressure compartments being operable to form a pressure gradient on a portion of the patient's limb when the tubular sleeve is disposed on the patient's limb; a pressure source fluidly coupled to each pressure compartment of the plurality of pressure compartments; and a controller coupled to the pressure source and operable to control pressure delivery to successively compress each pressure compartment of the plurality of pressure compartments to encourage fluid movement in the patient's limb. ### Claim 44 (depends on 43) The system of claim 43, wherein the tubular sleeve further comprises an elastic compression member having a first side and a second side forming a sleeve. ### Claim 45 (depends on 44) The system of claim 44, wherein the each pressure compartment of the plurality of pressure compartments comprises a fluid-directing member having a first side and a second side, wherein the first side is positioned adjacent the second side of the elastic compression member, and wherein the fluid-directing member is configured to inhibit fluids from flowing through the fluid-directing member. ### Claim 46 (depends on 45) The system of claim 45, wherein each pressure compartment of the plurality of pressure compartments comprises a pathway member having a first side and a second side, wherein the first side is positioned adjacent the second side of the fluid-directing member, and wherein the pathway member is configured to permit flow of a fluid when the tubular sleeve is under a pressure gradient. ### Claim 47 (depends on 46) The system of claim 46, wherein each pressure compartment of the plurality of pressure compartments comprises at least one exhaust port fluidly coupled to the pathway member and operable to allow fluids to exit the pressure compartment. ### Claim 48 (depends on 46) The system of claim 46, wherein each pressure compartment of the plurality of pressure compartments further comprises an absorbent member having a first side and a second side, wherein the first side is positioned adjacent the second side of the pathway member, and wherein the absorbent member is configured to at least temporarily retain liquids. ### Claim 49 (depends on 48) The system of claim 48, wherein each pressure compartment of the plurality of pressure compartments further comprises a transition member having a first side and a second side, wherein the first side of the transition member is disposed proximate to the second side of the absorbent member, the transition member configured to wick liquids. ### Claim 50 (depends on 49) The system of claim 49, wherein each pressure compartment of the plurality of pressure compartments further comprises a patient-interface member having a first side and a second side, wherein the first side of the patient-interface member is disposed proximate to the second side of the transition member and the second side of the patient-interface member is adapted to be disposed proximate to the patient. ### Claim 51 (depends on 48) The system of claim 48, wherein each pressure compartment of the plurality of pressure compartments is separated from adjacent pressure compartments by a compartment wall. ### Claim 52 A wound dressing for treating a wound on a patient's limb, the wound dressing comprising: an elastic compression member having a first side and a second side forming a sleeve; a fluid-directing member having a first side, a second side, and being operable to inhibit fluids from flowing through the fluid-directing member, wherein the first side is positioned adjacent the second side of the elastic compression member; a pathway member having a first side, a second side, and being operable to permit flow of a fluid when the wound dressing is under a pressure gradient, wherein the first side is positioned adjacent the second side of the fluid-directing member; an absorbent member having a first side, a second side, and being operable to at least temporarily retain liquids, wherein the first side is positioned adjacent the second side of the pathway member; and at least one exhaust port fluidly coupled to the pathway member and operable to allow fluids to exit the wound dressing. ### Claim 53 (depends on 52) The wound dressing of claim 52, wherein the fluid directing member comprises a drape layer. ### Claim 54 (depends on 52) The wound dressing of claim 52, wherein the wound dressing further comprises a sensor fluidly coupled to the pathway member, wherein the sensor is coupled to a controller, and the sensor and the controller are configured to determine if the pathway member is saturated and, in response, to activate a pressure source. ### Claim 55 (depends on 52) The wound dressing of claim 52, wherein the wound dressing further comprises a sensor fluidly coupled to the absorbent member, wherein the sensor is coupled to a controller, and the sensor and the controller are configured to determine if the absorbent member is saturated and, in response, to activate a pressure source. ### Claim 56 (depends on 52) The wound dressing of claim 52, wherein the pathway member comprises an open-cell reticulated foam.