US 11,752,253 B2
NPWT system with selectively controllable airflow
Prathamesh Madhav Kharkar, San Antonio, TX (US); Marisa Schmidt, San Antonio, TX (US); Kathleen L. Derrick, San Antonio, TX (US); Diwi L. Allen, San Antonio, TX (US); Nathaniel Young, San Antonio, TX (US); and Kristine M. Kieswetter, San Antonio, TX (US)
Assigned to KCI Licensing, Inc., San Antonio, TX (US)
Appl. No. 17/45,630
Filed by KCI LICENSING, INC., San Antonio, TX (US)
PCT Filed Apr. 11, 2019, PCT No. PCT/US2019/026893
§ 371(c)(1), (2) Date Oct. 6, 2020,
PCT Pub. No. WO2019/200035, PCT Pub. Date Oct. 17, 2019.
Claims priority of provisional application 62/657,342, filed on Apr. 13, 2018.
Prior Publication US 2021/0162107 A1, Jun. 3, 2021
Int. Cl. A61M 1/00 (2006.01); A61F 13/00 (2006.01); A61F 13/02 (2006.01)
CPC A61M 1/964 (2021.05) [A61F 13/00055 (2013.01); A61F 13/00068 (2013.01); A61F 13/0216 (2013.01); A61M 1/73 (2021.05); A61M 1/95 (2021.05); A61M 2205/3324 (2013.01); A61M 2205/584 (2013.01); A61M 2205/75 (2013.01)] 14 Claims
OG exemplary drawing
1. An assembly comprising:
a drape substantially sealable over a wound bed;
a track pad configured to couple a tube to the drape and allow the tube to provide suction to the wound bed;
a vent opening in the drape;
a filter coupled to the drape and communicating with the vent opening;
a cover coupled to the drape and movable between a first position to cover the vent opening and filter, and a second position to uncover the vent opening and the filter; and
a fluid indicator coupled to the drape and operable to provide a visual indication that fluid build-up is present in the wound bed, the fluid indicator comprising:
a bottom layer comprising a substrate coated with a water-soluble biocompatible colorant, and
a top layer substantially unpigmented and configured to allow capillary action from the bottom layer, the capillary action drawing the colorant to the top layer when the bottom layer contacts fluid.