# US 8,784,392 B2 · System for providing continual drainage in negative pressure wound therapy > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,392 B2 - Document ID: US8784392B2 - Status: Granted - Kind: B2 - Application number: 13/571,548 - Filed: 2012-08-10 - Published: 2013-07-04 - Granted: 2014-07-22 - Earliest claimed: 2009-06-01 - Assignees: Smith & Nephew, Inc. - Applicants: Mark A. Vess; Chirag B. Shah; Richard M. Braga; David R. Swisher - Inventors: Mark A. Vess; Chirag B. Shah; Richard M. Braga; David R. Swisher - Web page: https://patentgrep.com/patent/US8784392B2 ## CPC - A61M 1/964: {having venting means on or near the dressing} - A61F 13/023: {wound covering film layers without a fluid retention layer} - A61M 1/85: {with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants (for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208)} - A61M 1/86: {Connectors between drainage tube and handpiece, e.g. drainage tubes detachable from handpiece} - A61M 1/912: {Connectors between dressing and drainage tube} - A61M 1/98: {Containers specifically adapted for negative pressure wound therapy} - A61F 2013/00089: {Wound bandages (A61F2013/00361 takes precedence;)} - A61F 2013/00174: {possibility of applying pressure} - A61M 1/784: {by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves} - A61M 1/88: {Draining devices having means for processing the drained fluid, e.g. an absorber (for liposuction A61M1/892)} - A61M 2205/583: by visual feedback - A61M 2205/7518: bacterial - A61M 2205/7536: allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes - 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)} - 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) ## Abstract A system for subatmospheric pressure therapy in connection with healing a wound is provided. The system includes a wound dressing cover dimensioned for positioning relative to a wound bed of a subject to establish a reservoir over the wound bed in which subatmospheric pressure may be maintained, a subatmospheric pressure mechanism including, a housing, a vacuum source disposed in the housing, and a collection canister in fluid communication with the vacuum source. The system further includes an exudate conduit in fluid communication with the wound dressing and the collection canister for collecting exudate removed from the reservoir and deposited in the collection canister under influence of the vacuum source and a vent conduit in fluid communication with the collection canister and the wound dressing for introducing air into the reservoir to facilitate flow of exudate through the exudate conduit. ## Claims ### Claim 1 A system for subatmospheric pressure therapy in connection with healing a wound, the system comprising: a wound dressing dimensioned for positioning over the wound and configured to establish a reservoir over the wound in which subatmospheric pressure may be maintained; a subatmospheric pressure mechanism comprising a housing and a vacuum source disposed in the housing; a collection canister configured to be in fluid communication with the vacuum source; a wound port configured to be operatively connected to the wound dressing in fluid communication with the reservoir, the wound port comprising: a vacuum port; and a plurality of holes formed in a plate and arranged circumferentially around the wound port, the plurality of holes being operable to allow ambient air into the reservoir; and an exudate conduit configured to be in fluid communication with the wound port and the collection canister, the exudate conduit configured for transporting exudate removed from the reservoir to be deposited in the collection canister under influence of the vacuum source. ### Claim 2 (depends on 1) The system according to claim 1, wherein the plate is welded to the wound port. ### Claim 3 (depends on 1) The system according to claim 1, wherein the plate is configured to be attached to the wound dressing. ### Claim 4 A system for subatmospheric pressure therapy in connection with healing a wound, the system comprising: a port configured to be in fluid communication with a wound dressing, the port comprising: a vacuum port; and a plurality of holes formed in a plate, the plurality of holes configured to allow ambient air under the wound dressing. ### Claim 5 (depends on 4) The system according to claim 4, wherein the plurality of holes are arranged substantially circumferentially around the port. ### Claim 6 (depends on 4) The system according to claim 4, further comprising a negative pressure source configured to provide negative pressure to the wound dressing, wherein the port is configured to be in fluid communication with the negative pressure source via the vacuum port. ### Claim 7 (depends on 6) The system according to claim 6, further comprising a lumen configured to be in fluid communication with the port and the negative pressure source, the lumen configured to communicate negative pressure under the dressing. ### Claim 8 (depends on 6) The system according to claim 6, further comprising a canister configured to be in fluid communication with the negative pressure source, the canister further configured to store exudate removed from the wound. ### Claim 9 (depends on 4) The system according to claim 4, wherein the plate is welded to the port. ### Claim 10 (depends on 4) The system according to claim 4, wherein the plate is configured to be attached to the wound dressing. ### Claim 11 (depends on 4) The system according to claim 4, further comprising the wound dressing configured to cover the wound. ### Claim 12 (depends on 4) The system according to claim 4, further comprising a conduit configured to be in fluid communication with the wound dressing and the vacuum port, the conduit configured to transport exudate removed from the wound. ### Claim 13 (depends on 12) The system according to claim 12, further comprising a conduit configured to be in fluid communication with the wound dressing and the vacuum port, the conduit configured to transport exudate removed from the wound to the canister. ### Claim 14 (depends on 4) The system according to claim 4, further comprising a canister configured to be in fluid communication with a negative pressure source, the canister further configured to store exudate removed from the wound. ### Claim 15 (depends on 4) The system according to claim 4, wherein the port further comprises a vent configured to be in fluid communication with atmosphere. ### Claim 16 (depends on 15) The system according to claim 15, wherein the vent is covered by a filter. ### Claim 17 (depends on 4) The system according to claim 4, wherein the port further comprises a conduit. ### Claim 18 (depends on 17) The system according to claim 17, wherein the port further comprises a flange coupled to the conduit. ### Claim 19 (depends on 18) The system according to claim 18, wherein the flange is configured to be affixed to the wound dressing.