Silencer for vacuum system of a wound drainage apparatus

摘要

Apparatus (10, 200) for the provision of TNP therapy to a wound is described, the apparatus (10, 200) including: a waste canister (22, 204) into which fluid is aspirated from a wound by aspiration pump means (44, 248) and a fluid flow path (420, 422) for at least a part of said aspirated fluid on an outlet side of said aspiration pump means (44) wherein said fluid flow path (420, 422) on the outlet side comprises a silencing system (400) having a plurality of silencing elements (402, 404, 406) therein.

主权项

1. A topical negative pressure apparatus comprising:
a casing comprising an exterior portion and an interior portion, the interior portion defining a first interior volume; a pump configured to aspirate fluid from a wound, the pump located in the first interior volume and attached directly to the inner portion of the casing; a waste canister configured to collect fluid aspirated from the wound, the waste canister not positioned in the first interior volume and configured to be attached to the casing; a fluid flow path connecting the pump and the waste canister; and a silencing system in the fluid flow path, the silencing system comprising:
a first exhaust conduit and a second exhaust conduit;a plenum chamber situated between the first and second exhaust conduits and positioned within the first interior volume, the plenum chamber comprising a housing defining a second interior volume and an outer rim, the second interior volume comprising sound absorbing material; anda removable cover integrated into the casing, the cover configured to seal the second interior volume by engaging with the outer rim of the plenum chamber in a first position, the cover further configured to provide access to the second interior volume in a second position so that the sound absorbing material can be replaced, the sound absorbing material configured to remain within the first interior volume when the cover is moved from the first position to the second position.