Instillation cartridge for vacuum actuated fluid delivery

A system for providing negative-pressure therapy and instillation therapy, the system comprising:

• a cartridge having a first chamber, a second chamber, and a reservoir of fluid disposed in the second chamber;
• a diaphragm disposed in the cartridge between the first chamber and the second chamber, the diaphragm operable to move between a charge position and a discharge position in response to a level of negative pressure in the second chamber;
• a pressure sensing port fluidly coupled to the second chamber;
• and
• a controller coupled to the pressure sensing port and configured to determine the level of negative pressure in the second chamber.

A method for providing negative-pressure therapy and instillation therapy, the method comprising:

• providing a negative-pressure source;
• providing a cartridge comprising:
• a first chamber;
• a second chamber including a reservoir of fluid;
• a diaphragm disposed between the first chamber and the second chamber, the diaphragm operable to move between a charge position and a discharge position in response to a level of negative pressure in the second chamber;
• a pressure sensing port fluidly coupled to the second chamber;
• and
• a negative-pressure port in fluid communication with the second chamber and configured to be coupled to the negative-pressure source;
• fluidly coupling the negative-pressure source to the negative-pressure port;
• and
• supplying negative-pressure to the second chamber to move the diaphragm against the reservoir of fluid.