# US 10,117,977 B2 · Devices and methods for application of reduced pressure therapy > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,117,977 B2 - Document ID: US10117977B2 - Status: Granted - Kind: B2 - Application number: 12/047,739 - Filed: 2008-03-13 - Published: 2009-01-08 - Granted: 2018-11-06 - Earliest claimed: 2007-03-14 - Assignees: The Board of Trustees of the Leland Stanford Junior University - Applicants: Moshe Pinto; Dean Hu; Kenton Fong - Inventors: Moshe Pinto; Dean Hu; Kenton Fong - Web page: https://patentgrep.com/patent/US10117977B2 ## CPC - A61F 13/01029: {made of multiple layers} - 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] - A61M 1/815: {the barrel serving as aspiration container, e.g. in a breast pump} - A61M 1/915: {Constructional details of the pressure distribution manifold} - A61M 1/92: {with liquid supply means} - A61M 1/962: {having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction} - A61M 1/98: {Containers specifically adapted for negative pressure wound therapy} - A61F 13/069: {Decubitus ulcer bandages} - A61F 2013/00174: {possibility of applying pressure} - A61F 2013/00412: {for use with needles, tubes or catheters} - A61F 2013/00519: {for treating burn} - A61F 2013/00536: {for draining or irrigating wounds} - A61F 2013/0054: {for deep wounds} - A61M 1/772: {operating alternately} - 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 1/984: {portable on the body} - 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)} ## Abstract The tissue therapy device includes a sealant layer and a suction apparatus. The sealant layer creates a sealed enclosure between it and the surface of a patient by forming an airtight seal around an area of tissue. The suction apparatus is in fluid communication with the sealant layer and together, create a closed, reduced pressure therapy system. The suction apparatus self-creates reduced pressure by decreasing the density of air molecules underneath the sealant layer by expanding the volume of the air molecules. ## Claims ### Claim 1 A tissue therapy device, the device comprising: a sealant layer comprising: a base member comprising an aperture, and a cap member configured to removably seal the aperture of the base member, wherein the base member and the cap member farm a sealed enclosure around an area of tissue; and a suction apparatus comprising: a body with a variable volume portion bounded by a rigid wall portion, a slidable sealing member configured to sealably slide along the rigid wall portion, and a retaining mechanism configured to hold the slidable sealing member in a withdrawn position within the rigid wall portion to create and maintain a negative pressure within the sealed enclosure, wherein the retaining mechanism comprises an elongated structure with a distal portion attached to the slidable sealing member and a proximal portion configured to movably engage projections of the suction apparatus. ### Claim 2 (depends on 1) The device of claim 1, wherein the suction apparatus is configured to expand a volume of air located in a joint volume of space shared between the sealed enclosure and the suction apparatus. ### Claim 3 (depends on 1) The device of claim 1, wherein the suction apparatus is configured to create a level of reduced pressure underneath the sealant layer that is between about 0 and about 760 mm Hg. ### Claim 4 (depends on 1) The device of claim 1, wherein the device is further configured to maintain a level of reduced pressure that is between about 0 nun Hg and about 760 mm Hg. ### Claim 5 (depends on 1) The device of claim 1, wherein the retaining mechanism is a ratcheting mechanism. ### Claim 6 (depends on 1) The device of claim 1, wherein the suction apparatus further comprises a collection chamber. ### Claim 7 (depends on 1) The device of claim 1, wherein the device further comprises an external collection chamber. ### Claim 8 (depends on 1) The device of claim 1, wherein the device further comprises a second suction apparatus. ### Claim 9 (depends on 1) The device of claim 1, wherein the suction apparatus and the sealant layer are integrated into a single structure. ### Claim 10 (depends on 1) The device of claim 1, wherein the suction apparatus is configured to be disconnected from and reconnected to the sealant layer without disturbing the sealant layer. ### Claim 11 (depends on 1) The device of claim 1, wherein the device further comprises a second suction apparatus, and wherein the second suction apparatus is configured to be connected to the sealant layer. ### Claim 12 (depends on 1) The device of claim 1, wherein the suction apparatus comprises a one-way flow valve, and wherein the one-way flow valve is configured to prevent fluid from returning to a section of tissue requiring therapy. ### Claim 13 (depends on 1) The device of claim 1, wherein the device further comprises a safety valve. ### Claim 14 (depends on 1) The device of claim 1, wherein the device further comprises a securing member configured to attach the suction apparatus to a patient. ### Claim 15 (depends on 1) The device of claim 1, wherein the device further comprises a contact layer. ### Claim 16 (depends on 15) The device of claim 15, wherein the contact layer is a stacked mesh matrix. ### Claim 17 (depends on 15) The device of claim 15, wherein at least two of the suction apparatus, the contact layer, and the sealant layer are integrated together while a third is a separate structure. ### Claim 18 (depends on 1) The device of claim 1, wherein the device further comprises a protective layer placed around the area of tissue to be treated. ### Claim 19 (depends on 15) The device of claim 15, wherein the contact layer comprises a pouch containing a plurality of contact structures. ### Claim 20 A tissue therapy device, the device comprising: a sealant layer comprising: a base member comprising an aperture, and a cap member configured to removably seal the aperture of the base member, wherein the base member and the cap member form a sealed enclosure around an area of tissue; and a non-electrically powered suction apparatus comprising: a non-cylindrical variable volume portion bounded by a rigid wall portion, a slidable sealing member configured to sealably slide along the rigid wall portion, and a retaining mechanism configured to hold the slidable sealing member in a withdrawn position within the rigid wall portion to create and maintain a negative pressure underneath the sealant layer, wherein the retaining mechanism comprises an elongated structure with a distal portion attached to the slidable sealing member and a proximal portion configured to movably engage projections of the suction apparatus. ### Claim 21 (depends on 1) The device of claim 1, wherein the projections of the suction apparatus comprise a plurality of teeth oriented longitudinally along a length of the suction apparatus. ### Claim 22 (depends on 21) The device of claim 21, wherein the plurality of teeth are externally exposed on the suction apparatus. ### Claim 23 (depends on 1) The device of claim 1, wherein the suction apparatus further comprises a handle attached to the retaining mechanism. ### Claim 24 (depends on 1) The device of claim 1, wherein the retaining mechanism comprises a proximal loop structure. ### Claim 25 (depends on 1) The device of claim 1, wherein the suction apparatus further comprises a proximal handle directly attached to the retaining mechanism. ### Claim 26 (depends on 25) The device of claim 25, wherein the device further comprises a distal handle directly attached to the suction apparatus at a location distal to a proximal end of the suction apparatus. ### Claim 27 (depends on 1) The device of claim 1, wherein the proximal portion of the elongated structure comprises a plurality of fixed teeth. ### Claim 28 (depends on 26) The device of claim 26, wherein a plurality of fixed teeth are configured longitudinally along the proximal end of the suction apparatus. ### Claim 29 (depends on 1) The device of claim 1, wherein the base member forms a complementary interfit with the cap member. ### Claim 30 (depends on 29) The device of claim 29, wherein the complementary interfit comprises complementary threads on the base member and the cap member. ### Claim 31 (depends on 29) The device of claim 29, wherein the complementary interfit is a snapfit. ### Claim 32 (depends on 20) The device of claim 20, wherein the base member forms a complementary interfit with the cap member. ### Claim 33 (depends on 32) The device of claim 32, wherein the complementary interfit comprises complementary threads on the base member and the cap member. ### Claim 34 (depends on 32) The device of claim 32, wherein the complementary interfit is a snapfit. ### Claim 35 (depends on 1) The device of claim 1, wherein the variable volume portion is in fluid communication with the sealed enclosure through the cap member. ### Claim 36 (depends on 1) The device of claim 1, wherein the base member comprises a suction aperture configured to attach to the suction apparatus. ### Claim 37 (depends on 1) The device of claim 1, wherein the cap member comprises a suction aperture configured to attach to the suction apparatus. ### Claim 38 (depends on 1) The device of claim 1, wherein the base member comprises a stabilizing member configured to stabilize the base member when the cap member is being removed from the resealable aperture of the base member. ### Claim 39 (depends on 1) The device of claim 1, wherein at least one of the cap member or the base member comprises a gasket configured to facilitate an airtight seal. ### Claim 40 (depends on 1) The device of claim 1, wherein the cap member comprises a contact layer configured to contact the sealed enclosure when the cap member seals the resealable aperture. ### Claim 41 A tissue therapy device, the device comprising: a sealant layer comprising: a base member comprising a resealable aperture, and a cap member configured to removably seal the aperture of the base member, wherein the base member and the cap member form a sealed enclosure around an area of tissue, and wherein the base member further comprises a stabilizing member configured to stabilize the base member when the cap member is being removed from the resealable aperture of the base member; and a suction apparatus comprising: a body with a variable volume portion bounded by a rigid wall portion, a slidable sealing member configured to sealably slide along the rigid wall portion, and a retaining mechanism configured to hold the slidable sealing member in a withdrawn position within the rigid wall portion to create and maintain a negative pressure within the sealed enclosure. ### Claim 42 A tissue therapy device, the device comprising: a sealant layer comprising: a base member comprising an aperture, and a cap member configured to removably seal the aperture of the base member, wherein the base member and the cap member form a sealed enclosure around an area of tissue, and wherein at least one of the cap member or the base member comprises a gasket configured to facilitate an airtight seal; and a suction apparatus comprising: a body with a variable volume portion bounded by a rigid wall portion, a slidable sealing member configured to sealably slide along the rigid wall portion, and a retaining mechanism configured to hold the slidable sealing member in a withdrawn position within the rigid wall portion to create and maintain a negative pressure within the sealed enclosure. ### Claim 43 A tissue therapy device, the device comprising: a sealant layer comprising: a base member comprising a resealable aperture, and a cap member configured to removably seal the aperture of the base member, wherein the base member and the cap member form a sealed enclosure around an area of tissue, and wherein the cap member further comprises a contact layer configured to contact the sealed enclosure when the cap member seals the resealable aperture; and a suction apparatus comprising: a body with a variable volume portion bounded by a rigid wall portion, a slidable sealing member configured to sealably slide along the rigid wall portion, and a retaining mechanism configured to hold the slidable sealing member in a withdrawn position within the rigid wall portion to create and maintain a negative pressure within the sealed enclosure.