Pressure compensating seal with positive feedback

摘要

A limb wound treatment device is described having a first end, a second end and an interior therebetween for accommodating a treatment gas. The device can include a flexible housing that can be inflated. The first end can include an inflatable cuff seal for hermetically sealing against the limb being treated. The second end can include a closed end or an access port that is releasably sealed with a clamping mechanism. Further, the device can include a controller that can inflate that housing, inflate the cuff seal and provide treatment gas to the interior, in response to pressures within the cuff seal and the housing. Further, the device can accommodate different types of wound treatments, such as hyperbaric therapy, compression therapy or negative pressure therapy.

主权项

1. A wound treatment device, comprising:
a housing having an open end and an interior region for the treatment of a limb of a patient received within the interior region by a gas supplied thereto; a housing pressure sensor for measuring a gas pressure in the interior region of the housing; an inflatable cuff for sealing a portion of the housing adjacent the open end against the limb of the patient; a cuff pressure sensor for measuring a gas pressure in the cuff; a cuff gas inlet valve coupled to said cuff; a cuff gas outlet valve coupled to said cuff; and a controller for opening and closing the cuff gas inlet and outlet valves, the controller adjusting the supply of gas into the cuff for controlling the cuff gas pressure sensed by the cuff pressure sensor based on measurements of the interior region gas pressure as determined by the housing pressure sensor for maintaining a seal by the cuff against the limb of the patient.