Negative pressure wound therapy systems, devices, and methods

Abstract

A negative pressure wound therapy system includes a wound dressing and a suction device configured to be in fluid communication with the wound dressing via a conduit to channel a fluid between at least the wound dressing and the suction device. The suction device includes a vacuum connection configured to be coupled to the conduit, a vacuum pump, an analog electronic pressure sensor in electrical communication with the vacuum pump, and a passive valve assembly. The passive valve assembly is in fluid communication with (1) the vacuum pump, (2), the analog electronic pressure sensor, and (3) the vacuum connection, and is configured to maintain the vacuum pump in fluid communication with the vacuum connection within a predefined pressure range, and to passively inhibit fluid communication between the vacuum pump and the vacuum connection outside of the predefined pressure range.

1 . A suction device for negative pressure wound therapy, the suction device comprising:
 a vacuum connection configured to deliver negative pressure to a treatment site;   a pump configured to supply negative pressure to the vacuum connection; and   a passive valve assembly in fluid communication with the pump and the vacuum connection,   wherein the passive valve assembly is configured to maintain the pump in fluid communication with the vacuum connection within a predefined pressure range, and to passively inhibit fluid communication between the pump and the vacuum connection outside of the predefined pressure range.