| CPC A61M 1/984 (2021.05) [A61M 1/67 (2021.05); A61M 1/81 (2021.05); A61M 1/815 (2021.05); A61M 1/732 (2021.05); A61M 1/74 (2021.05); A61M 1/88 (2021.05); A61M 1/982 (2021.05); A61M 2205/073 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3337 (2013.01); A61M 2205/3379 (2013.01); A61M 2205/3382 (2013.01); A61M 2205/502 (2013.01); A61M 2205/581 (2013.01); A61M 2205/587 (2013.01); A61M 2205/8206 (2013.01)] | 18 Claims |
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1. A portable pump for negative pressure wound therapy for drawing a vacuum from a wound site via a tube, the portable pump comprising:
an inlet configured to attach the tube from the wound site;
a canister in fluid communication with said inlet for collecting fluids drained from the wound site;
a manually-actuated pump mechanism for creating the vacuum, said manually-actuated pump mechanism comprising:
a vacuum chamber in fluid communication with said canister;
a piston disposed in said vacuum chamber;
a pump handle coupled to said piston so as to move said piston in said vacuum chamber between a first position and a second position so as to create the vacuum, the pump handle moving between a retracted position and an extended position, wherein said piston is in the first position when said pump handle is in the retracted position and is in the second position when said pump handle is in the extended position; and
a spring disposed in said vacuum chamber for biasing said piston into the second position such that the spring compresses as said piston is moved from the second position to the first position, wherein upon manually pumping said pump handle, said piston creates a vacuum so as to create the vacuum at the wound site and to draw any fluids from the wound site into said canister;
a pressure sensor for sensing a pressure level in said canister;
a pressure level indicator for indicating the sensed pressure level in said canister; and
a check valve disposed between said vacuum chamber and said canister for preventing air from flowing from said vacuum chamber into said canister when said piston is moved from the first position to the second position and for allowing air to be drawn from said canister to said vacuum chamber when said piston is moved from the second position to the first position.
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