| 主权项 |
1. An apparatus for providing negative pressure at a wound site, comprising:
a first negative pressure reservoir comprising a supply of negative pressure at a first negative pressure level; a conduit in communication with the first negative pressure reservoir and configured to supply the negative pressure in the first negative pressure reservoir to a wound chamber at a wound site; a first reservoir valve in communication with the conduit and the first negative pressure reservoir, the first reservoir valve configured to regulate and maintain a level of the negative pressure in the wound chamber by:
opening to allow the negative pressure stored at least in the first negative pressure reservoir to be supplied to the wound chamber in response to the pressure in the wound chamber increasing, andclosing in response to the pressure in the wound chamber reaching a desired negative pressure;wherein the first reservoir valve is configured to open and close in response to a pressure difference between pressure in the wound chamber and pressure in at least the first negative pressure reservoir; a second negative pressure reservoir in fluid communication with the first negative pressure reservoir; and a second reservoir valve in fluid communication with the first and second negative pressure reservoirs, the second reservoir valve being configured to control delivery of the negative pressure supplied by the second negative pressure reservoir to the first negative pressure reservoir. |
