	US 12,263,294 B2
	Systems and methods for operating negative pressure wound therapy devices
Edward Yerbury Hartwell, Hull (GB); Felix Clarence Quintanar, Hull (GB); and Johannes Dagevos van Rij, Cottingham (GB)
Assigned to T.J.Smith and Nephew, Limited, Hull (GB)
Filed by T.J.Smith and Nephew, Limited, Hull (GB)
Filed on Dec. 3, 2021, as Appl. No. 17/457,647.
Application 17/457,647 is a continuation in part of application No. 16/650,806, abandoned, previously published as PCT/EP2018/075751, filed on Sep. 24, 2018.
Application 17/457,647 is a continuation in part of application No. 16/333,948, abandoned, previously published as PCT/US2017/053839, filed on Sep. 27, 2017.
Claims priority of provisional application 62/563,889, filed on Sep. 27, 2017.
Claims priority of provisional application 62/401,019, filed on Sep. 28, 2016.
Claims priority of application No. 1811494 (GB), filed on Jul. 13, 2018.
Prior Publication US 2022/0088289 A1, Mar. 24, 2022 Prior Publication US 2023/0148439 A9, May 11, 2023
Int. Cl. A61M 1/00 (2006.01); A61F 13/02 (2024.01); A61F 13/05 (2024.01)

CPC A61M 1/966 (2021.05) [A61F 13/05 (2024.01); A61M 2205/18 (2013.01); A61M 2205/3327 (2013.01); A61M 2205/3553 (2013.01); A61M 2205/502 (2013.01); A61M 2205/581 (2013.01); A61M 2205/6063 (2013.01)]

17 Claims

1. A negative pressure wound therapy apparatus comprising:

a housing;

a sensor supported by the housing and configured to determine whether the housing is positioned in a moving transporter;

a negative pressure source supported by the housing and configured to couple via a fluid flow path to a wound dressing covering a wound, the negative pressure source configured to provide negative pressure to the wound;

a pressure sensor configured to detect pressure in the fluid flow path; and

an electronic control circuitry supported by the housing and configured to operate the negative pressure source, the electronic control circuitry further configured to:

responsive to a determination that the housing is positioned in the moving transporter based on the output of the sensor, cause the negative pressure wound therapy apparatus to operate in a first mode in which a threshold is decreased, thereby increasing sensitivity of a blockage alarm indicating a presence of blockage in the fluid flow path;

responsive to a determination that the housing is not positioned in the moving transporter based on the output of the sensor, cause the negative pressure wound therapy apparatus to operate in a second mode in which the threshold is increase, thereby decreasing sensitivity of the blockage alarm;

detect the presence of blockage in the fluid flow path based on comparing one or more peak-to-peak measurements of pressure in the fluid flow path measured by the pressure sensor to a threshold; and

provide indication of the blockage alarm responsive to the detection of the presence of blockage in the fluid flow path.

10. A method of controlling a negative pressure wound therapy apparatus, the method comprising:

by an electronic control circuitry supported by a housing of the negative pressure wound therapy apparatus:

causing provision of negative pressure wound therapy to a wound covered by a wound dressing;

at a first time:

determining that the housing is positioned in a moving transporter based on an output of a sensor; and

responsive to determining that the housing is positioned in a moving transporter, causing the negative pressure wound therapy apparatus to operate in a first mode in which a threshold is decreased, thereby increasing sensitivity of a blockage alarm indicating a presence of blockage in a fluid flow path configured to connect the housing to a wound covered by a wound dressing:

at a second time:

determining that the housing is not positioned in the moving transporter based on the output of the sensor; and

responsive to determining that the housing is not positioned in the moving transporter, causing the negative presssure wouud therapy apparatus to operate in a second mode in which the threshold is increased, thereby decreasing sensitivity of the blockage alarm;

detecting the presence of blockage in a fluid flow path based on comparing one or more peak-to-peak measurements of pressure in the fluid flow path to the threshold; and

providing indication of the blockage alarm responsive to detecting the presence of blockage in the fluid flow path.