# US 12,594,193 B2 · Systems and methods for monitoring operational lifetime of negative pressure wound treatment apparatuses > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,594,193 B2 - Document ID: US12594193B2 - Status: Granted - Kind: B2 - Application number: 17/792,065 - Filed: 2021-01-06 - Published: 2023-02-16 - Granted: 2026-04-07 - Earliest claimed: 2020-01-09 - Assignees: T.J.Smith and Nephew, Limited - Applicants: T.J.Smith and Nephew, Limited - Inventors: Roberto Damiao Da Costa Rodrigues - Web page: https://patentgrep.com/patent/US12594193B2 ## 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] - G16H 40/63: for local operation - A61M 1/74: {Suction control (underwater drainage A61M1/61)} - A61M 1/96: {Suction control thereof} - A61M 1/962: {having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction} - G16H 20/40: relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture - A61M 2205/52: with memories providing a history of measured variating parameters of apparatus or patient - 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) - G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA - 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 A negative pressure wound therapy system can include a wound dressing configured to be placed over a wound and configured to absorb fluid. The system can include a source of negative pressure configured to generate negative pressure to aspirate fluid from the wound. The system can include a memory. The system can include a controller configured to periodically store a plurality of data sets in the memory, in response to storing a data set of the plurality of data sets at a memory address in the memory, update the memory address for storing a subsequent data set, and in response to determining that the memory address corresponds to a memory address indicative of a duration of time following an initial activation of the system reaching a total permitted operational time of the system, provide an indication that the total permitted operational time of the system has been reached. ## Claims ### Claim 1 A negative pressure wound therapy system comprising: a source of negative pressure configured to provide negative pressure therapy to a wound covered by a wound dressing; and an electronic processing circuitry comprising a memory and configured to: periodically store a plurality of data sets at a plurality of memory locations in the memory associated with a plurality of memory addresses by storing a first data set of the plurality of data sets at a first memory location of the plurality of memory locations associated with a first memory address of the plurality of memory addresses and subsequently storing a second data set of the plurality of data sets at a second memory location of the plurality of memory locations associated with a second memory address of the plurality of memory addresses; determine that a total permitted operational time for providing negative pressure has been reached in response to: storing a most recent data set of the plurality of data sets, and determining that a third memory address of the plurality of memory addresses that is associated with a third memory location of the plurality of memory locations that stores the most recent data set corresponds to a memory address indicative of a duration of time following an initial activation of the electronic processing circuitry reaching the total permitted operational time for providing negative pressure therapy; and in response to determining that the total permitted operational time for providing negative pressure therapy has been reached, provide an indication that comprises permanently disabling provision of negative pressure therapy by the source of negative pressure. ### Claim 2 (depends on 1) The system of claim 1, wherein the electronic processing circuitry is configured to store each data set of the plurality of data sets at an expiration of a time interval. ### Claim 3 (depends on 2) The system of claim 2, wherein the time interval is fixed. ### Claim 4 (depends on 1) The system of claim 1, wherein the plurality of data sets are of a fixed size. ### Claim 5 (depends on 1) The system of claim 1, wherein the electronic processing circuitry is configured to determine the second memory address by incrementing the first memory address by a size of the first data set. ### Claim 6 (depends on 1) The system of claim 1, wherein the memory address indicative of the duration of time following the initial activation of the electronic processing circuitry reaching the total permitted operational time for providing negative pressure therapy is determined based on a frequency of storing the plurality of data sets in the memory, size of the plurality of data sets, and the total permitted operational time for providing negative pressure therapy. ### Claim 7 (depends on 6) The system of claim 6, wherein the memory address indicative of the duration of time following the initial activation of the electronic processing circuitry reaching the total permitted operational time for providing negative pressure therapy is determined by multiplying the frequency of storing the plurality of data sets in the memory by the size of the plurality of data sets and the total permitted operational time for providing negative pressure therapy. ### Claim 8 (depends on 6) The system of claim 6, wherein the memory address indicative of the duration of time following the initial activation of the electronic processing circuitry reaching the total permitted operational time for providing negative pressure therapy is further determined based on a size of data configured to be stored at the plurality of memory locations. ### Claim 9 (depends on 6) The system of claim 6, wherein the total permitted operational time for providing negative pressure therapy comprises 7 days, 10 days, or 14 days. ### Claim 10 (depends on 1) The system of claim 1, wherein the plurality of data sets comprise data related to provision of negative pressure therapy. ### Claim 11 (depends on 1) The system of claim 1 further comprising a power source configured to power the electronic processing circuitry, wherein the source of negative pressure, the electronic processing circuitry, and the power source are disposed on or within the wound dressing. ### Claim 12 (depends on 1) The system of claim 1, wherein the electronic processing circuitry is configured to provide the indication further by activating or deactivating at least one user interface component. ### Claim 13 (depends on 1) The system of claim 1, wherein the electronic processing circuitry is configured to provide the indication further by storing a value in the memory, the value indicating that the total permitted operational time for providing negative pressure therapy has been reached. ### Claim 14 (depends on 1) The system of claim 1, wherein the electronic processing circuitry is configured to determine that the total permitted operational time for providing negative pressure has been reached without considering data stored at the plurality of memory locations. ### Claim 15 A method of operating a negative pressure wound therapy system, the method comprising: by an electronic processing circuitry of the negative pressure wound therapy system: providing negative pressure therapy by a source of negative pressure to a wound covered by a wound dressing; periodically storing a plurality of data sets at a plurality of memory locations in the memory associated with a plurality of memory addresses by storing a first data set of the plurality of data sets at a first memory location of the plurality of memory locations associated with a first memory address of the plurality of memory addresses and subsequently storing a second data set of the plurality of data sets at a second memory location of the plurality of memory locations associated with a second memory address of the plurality of memory addresses; determining that a total permitted operational time for providing negative pressure has been reached in response to: storing a most recent data set of the plurality of data sets, and determining that a third memory address of the plurality of memory addresses that is associated with a third memory location of the plurality of memory locations that stores the most recent data set corresponds to a memory address indicative of a duration of time following an initial activation of the electronic processing circuitry reaching the total permitted operational time for providing negative pressure therapy; and in response to determining that the total permitted operational time for providing negative pressure therapy has been reached, providing an indication that comprises permanently disabling provision of negative pressure therapy by the source of negative pressure. ### Claim 16 (depends on 15) The method of claim 15, further comprising storing each data set of the plurality of data sets at an expiration of a time interval. ### Claim 17 (depends on 16) The method of claim 16, wherein the time interval is fixed. ### Claim 18 (depends on 15) The method of claim 15, wherein the plurality of data sets are of a fixed size. ### Claim 19 (depends on 15) The method of claim 15, further comprising determining the second memory address by incrementing the first memory address by a size of the first data set. ### Claim 20 (depends on 15) The method of claim 15, wherein the memory address indicative of the duration of time following the initial activation of the electronic processing circuitry reaching the total permitted operational time for providing negative pressure therapy is determined based on a frequency of storing the plurality of data sets in the memory, size of the plurality of data sets, and the total permitted operational time for providing negative pressure therapy. ### Claim 21 (depends on 20) The method of claim 20, wherein the memory address indicative of the duration of time following the initial activation of the electronic processing circuitry reaching the total permitted operational time for providing negative pressure therapy is determined by multiplying the frequency of storing the plurality of data sets in the memory by the size of the plurality of data sets and the total permitted operational time for providing negative pressure therapy.