US 11,896,464 B2
Method to dynamically measure apposition and patient limb movement in a negative pressure closed incision dressing
Christopher Brian Locke, Bournemouth (GB); Justin Alexander Long, Lago Vista, TX (US); and Timothy Mark Robinson, Blandford Forum (GB)
Assigned to KCI Licensing, Inc., San Antonio, TX (US)
Appl. No. 17/045,956
Filed by KCI LICENSING, INC., San Antonio, TX (US)
PCT Filed Apr. 8, 2019, PCT No. PCT/US2019/026375
§ 371(c)(1), (2) Date Oct. 7, 2020,
PCT Pub. No. WO2019/199687, PCT Pub. Date Oct. 17, 2019.
Claims priority of provisional application 62/657,325, filed on Apr. 13, 2018.
Prior Publication US 2021/0023281 A1, Jan. 28, 2021
Int. Cl. A61M 1/00 (2006.01); A61F 13/00 (2006.01)
CPC A61F 13/00051 (2013.01) [A61F 13/00068 (2013.01); A61M 1/73 (2021.05); A61M 1/74 (2021.05); A61M 1/915 (2021.05); A61M 1/966 (2021.05); A61M 1/984 (2021.05); A61M 2205/0283 (2013.01); A61M 2205/15 (2013.01); A61M 2205/18 (2013.01); A61M 2205/332 (2013.01); A61M 2205/3334 (2013.01); A61M 2205/3379 (2013.01); A61M 2205/3553 (2013.01); A61M 2230/63 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A negative pressure wound therapy system, comprising:
a wound dressing for a wound of a patient;
a first sensor configured to be coupled to the wound dressing, the first sensor configured to output an indication of a displacement in a first direction of the wound dressing;
a second sensor configured to be coupled to the wound dressing, the second sensor configured to output an indication of a displacement in a second direction of the wound dressing, the second direction perpendicular to the first direction;
wherein the wound dressing is configured to extend a first length along the first direction and a second length greater than the first length along the second direction; and
a control circuit configured to:
receive the indication of the displacement in the first direction and the indication of displacement in the second direction of the wound dressing,
calculate a therapy parameter including at least an appositional force of the wound dressing corresponding to the indication of the displacement in the first direction and a longitudinal movement of the wound dressing corresponding to the indication of displacement in the second direction, and
output the therapy parameter.
 
12. A method, comprising:
receiving an indication of a displacement in a first direction of a wound dressing for a wound of a patient from a first electro-active polymer (EAP) sensor;
receiving an indication of a displacement in a second direction of a wound dressing from a second EAP sensor, the second direction perpendicular to the first direction, the first EAP sensor extending along a first length of the wound dressing along the first direction and the second EAP sensor extending along a second length of the wound dressing along the second direction that is greater than the first length, the first EAP sensor and the second EAP sensor configured to output the indication based on a change in capacitance of the first EAP sensor and the second EAP sensor corresponding to the displacement in the first direction and the displacement in the second direction;
calculating a therapy parameter including at least an appositional force of the wound dressing corresponding to the indication of the displacement in the first direction and a longitudinal movement of the wound dressing corresponding to the indication of displacement in the second direction; and
outputting the therapy parameter.