Fluid instillation apparatus for use with negative-pressure system incorporating wireless therapy monitoring
Systems, apparatuses, and methods for instilling fluid to a tissue site in a negative-pressure therapy environment are described, Illustrative embodiments may include a pneumatically-actuated instillation pump that can draw a solution from a solution source during a negative-pressure interval, and instill the solution to a dressing during a venting interval. In one example embodiment, a system for providing negative-pressure and instillation to a tissue site may comprise a negative-pressure device and an instillation device. The negative-pressure device may comprise a negative-pressure source and a controller electrically coupled to the negative-pressure source. The instillation device may comprise a dosing valve having a dosing chamber including a dosing outlet configured to be fluidly coupled to a fluid port and a dosing inlet configured to be fluidly coupled to a source of instillation solution. The dosing valve may also have a working chamber including a biasing element operably engaged to the dosing chamber and configured to be fluidly coupled to the negative-pressure source. In some embodiments of the system, the instillation device may further comprise a wireless transceiver configured to communicate with the controller, and at least one sensor coupled to the wireless transceiver to provide a signal indicative of an operating condition of the dosing valve, and wherein the wireless transceiver is configured to communicate the at least one signal to the controller.
1. An apparatus for managing fluids in a system for providing negative-pressure therapy and instillation therapy to a tissue site, the apparatus comprising:
a dosing valve having a dosing chamber including a dosing inlet and a dosing outlet, and a working chamber including a biasing element operably engaged to the dosing chamber and configured to be actuated by pressure changes in the working chamber to expand and contract the dosing chamber;
a priming valve fluidly coupled to the dosing inlet;
a first check valve fluidly coupled to the dosing inlet through the priming valve and configured to be coupled by a first fluid conductor to a source of instillation solution;
a second check valve fluidly coupled to the dosing outlet;
a fluid port fluidly coupled to the second check valve by a second fluid conductor; and
a fluid fitting fluidly coupled to the working chamber by a third fluid conductor and coupled to the fluid port by a fourth fluid conductor, the fluid fitting configured to be coupled to a negative-pressure source for providing negative pressure.
2. The apparatus of claim 1 , further comprising a wireless transceiver and a sensor coupled to the wireless transceiver and disposed within the working chamber to provide a charging signal indicative of pressure changes within the working chamber, wherein the wireless transceiver is configured to communicate the charging signal to a controller configured to be coupled to the wireless transceiver.
3. The apparatus of claim 1 , further comprising a wireless transceiver and a sensor coupled to the wireless transceiver and disposed between the first check valve and a dosing input of the dosing chamber to provide a fluid supply signal indicative of an amount of instillation solution within the source of instillation solution, wherein the wireless transceiver is configured to communicate the fluid supply signal to a controller configured to be coupled to the wireless transceiver.
4. The apparatus of claim 1 , wherein the dosing valve further comprises a diaphragm disposed therein to separate the dosing chamber from the working chamber.
5. The apparatus of claim 4 , wherein the biasing element is a linear actuator biased against the diaphragm for motivating the diaphragm and the apparatus further comprises a wireless transceiver and wherein the linear actuator is coupled to the wireless transceiver and actuated by a controller configured to be coupled to the wireless transceiver.
6. The apparatus of claim 5 , wherein the linear actuator comprises a feedback mechanism to provide a position signal indicative of a position of the diaphragm and a dosage of instillation solution selected to be provided by the dosing valve, and wherein the wireless transceiver is configured to communicate the position signal to the controller.
7. The apparatus of claim 1 , further comprising a wireless transceiver and a sensor coupled to the wireless transceiver and disposed adjacent the dosing chamber to provide a fluid dosing signal indicative of a dosage of instillation solution provided by the dosing valve, wherein the wireless transceiver is configured to communicate the fluid dosing signal to a controller configured to be coupled to the wireless transceiver.