Apparatus and method for wound treatment employing periodic...

A - Human Necessities – 61 – M

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A61M 1/00 (2006.01) A61F 13/02 (2006.01)

Patent

CA 2674858

A tissue treatment apparatus and method are provided for treating tissue by the application of the time-varying sub-atmospheric pressure. The apparatus includes a cover adapted to cover a wound and adapted to maintain sub-atmospheric pressure the site of the wound. The apparatus further includes a source of suction configured to generate a time-varying sub-atmospheric pressure having a periodic waveform comprising a gradual change in pressure. The suction source cooperates with the cover to supply the time-varying sub-atmospheric pressure under the cover to the wound. The time-varying sub-atmospheric pressure may vary between a first pressure value below the inherent tissue tension of the wound tissue and a second pressure value above the inherent tissue tension of the wound tissue.

La présente invention concerne un appareil et un procédé de traitement des tissus par application d'une pression inférieure à la pression atmosphérique et variable dans le temps. L'appareil comprend une protection destinée à protéger une plaie et qui maintient, sur la plaie, une pression inférieure à la pression atmosphérique. L'appareil comprend également une source d'aspiration configurée pour créer une pression inférieure à la pression atmosphérique, variable dans le temps, et dont la forme d'onde périodique comprend un changement graduel de pression. La source d'aspiration crée, conjointement à la protection et au niveau de la plaie, la pression inférieure à la pression atmosphérique et variable dans le temps. La pression inférieure à la pression atmosphérique variable dans le temps peut varier entre une première valeur inférieure à la tension inhérente du tissu de la plaie et une seconde valeur supérieure à cette tension inhérente.

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