Fluid Control Device For Negative Pressure Wound Therapy System

A negative pressure wound therapy (NPWT) system for treatment of a wound site, the NPWT system comprising:

• a wound dressing disposed at the wound site;
• an exudate canister configured to receive wound exudate removed from the wound site;
• a pump comprising an inlet and an outlet, the pump being configured to provide a negative pressure at the inlet and a positive pressure at the outlet;
• a first valve disposed in fluid communication with the inlet of the pump;
• a second valve disposed in fluid communication with the outlet of the pump;
• and
• a canister assembly comprising:
• a first canister comprising a first chamber and a first diaphragm disposed in the first chamber and dividing the first chamber into a first air chamber and a first exudate chamber, the first diaphragm further fluidly isolating the first air chamber from the first exudate chamber, wherein the first air chamber is disposed in fluid communication with each of the first valve and the second valve, and wherein the first exudate chamber is configured to be in selective fluid communication with the wound dressing and the exudate canister;
• and
• a second canister fluidly isolated from the first canister, the second canister comprising a second chamber and a second diaphragm disposed in the second chamber and dividing the second chamber into a second air chamber and a second exudate chamber, the second diaphragm further fluidly isolating the second air chamber from the second exudate chamber, wherein the second air chamber is disposed in fluid communication with each of the first valve and the second valve, and wherein the second exudate chamber is configured to be in selective fluid communication with the wound dressing and the exudate canister;
• wherein the first valve is configured to selectively fluidly communicate the inlet with one of the first air chamber of the first canister and the second air chamber of the second canister, and wherein the second valve is configured to selectively fluidly communicate the outlet with the other of the first air chamber of the first canister and the second air chamber of the second canister.