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Pump system for negative pressure wound therapy

  • US 7,857,806 B2
  • Filed: 04/12/2007
  • Issued: 12/28/2010
  • Est. Priority Date: 07/14/2005
  • Status: Active Grant
First Claim
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1. A system for applying negative pressure therapy to a wound, comprising:

  • a wound dressing including a wound cover that is sealable to skin surrounding a wound;

    a portable suction pump powered by a battery or by an alternating current electrical power supply;

    a conduit having an end operatively associated with the wound dressing and an opposite end operatively associated with the suction pump, to communicate suction to the wound;

    the suction pump comprising a flow monitor to detect a flow rate in the conduit;

    a waste collector disposed in the conduit between the wound dressing and the suction pump for collecting liquids aspirated from the wound, the waste collector being releasably supported by a docking station on the pump;

    the flow monitor comprising a non-numerical annunciator having an indicator that provides color-coded visual indications of flow conditions including an indication that the flowrate is within a range indicative of a blockage showing an occlusion in the system, normal operation, an indication that the flow rate is at a first level indicative of a first level of leakage in the system, and an indication that the flow rate is at a second level indicative of a second and higher level of leakage in the system.

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