Patent ID: 8251979

Claim:
A portable negative pressure wound therapy system comprising: a dressing assembly for positioning over a wound to apply a negative pressure to the wound; and a canister assembly including: a vacuum source; and a collection canister in communication with the dressing assembly operable to receive fluid from the wound, the collection canister including: a chamber operable to receive fluid from the wound; a filter assembly having a first filter and a second filter at respective opposing ends of said chamber; a first passageway defined between said first filter and a first wall of said collection canister; a second passageway defined between said second filter and a second wall of said collection canister; and a canister interface having a suction port fluidly connecting the chamber to the vacuum source, an inlet port fluidly connecting the chamber to the dressing assembly, and a channel at least partially defined by a surface of the canister interface, wherein said first filter is configured to prevent fluid from entering said first passageway while allowing gas to pass therethrough and said second filter is configured to prevent fluid from entering said second passageway while allowing gas to pass therethrough.