Negative-pressure therapy with disposable instillation pump chamber

Abstract

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. A pneumatic actuator may be mechanically coupled to a disposable distribution system that can provide a fluid path between the solution source and a distribution component. A bacterial filter may be disposed in the fluid path between the actuator and the distribution component to prevent contamination of the actuator during operation. The distribution system may be separated from the actuator and disposed of after operation, and the actuator may be re-used.

1 - 16 . (canceled) 
     
     
         17 . A system for providing negative-pressure and instillation therapy, the system comprising:
 a negative-pressure source configured to provide a negative-pressure interval and a venting interval;   an actuator comprising a pneumatic cylinder; and   a distribution system comprising a dosing chamber, a fluid port configured to be fluidly coupled to the dosing chamber and to the negative-pressure source, and a fluid fitting configured to couple the pneumatic cylinder to the fluid port;   wherein the actuator is configured to expand the dosing chamber during the negative-pressure interval and contract the dosing chamber during the venting interval.   
     
     
         18 . The system of  claim 17 , wherein the distribution system comprises a bacterial filter between the fluid port and the fluid fitting. 
     
     
         19 . The system of  claim 17 , wherein the distribution system comprises a constriction between the dosing chamber and the fluid port. 
     
     
         20 . The system of  claim 17 , further comprising a solution source fluidly coupled to the dosing chamber. 
     
     
         21 . The system of  claim 17 , wherein the distribution system further comprises:
 a first check valve fluidly coupled to the dosing chamber; and   a second check valve fluidly coupled to the dosing chamber and to the fluid port.   
     
     
         22 . The system of  claim 17 , wherein the distribution system further comprises:
 a first fluid conductor between the dosing chamber and the fluid port; and   a second fluid conductor between the fluid fitting and the fluid port.   
     
     
         23 . The system of  claim 17 , wherein the dosing chamber comprises a bellows. 
     
     
         24 . The system of  claim 17 , wherein the dosing chamber comprises a rolling diaphragm. 
     
     
         25 . The system of any of  claim 17 , wherein the actuator further comprises a clamp between the dosing chamber and the fluid port, and the actuator is configured to close the clamp under negative pressure. 
     
     
         26 . (canceled) 
     
     
         27 . (canceled) 
     
     
         28 . The system of any of  claim 18 , wherein the actuator further comprises a clamp between the dosing chamber and the fluid port, and the actuator is configured to close the clamp under negative pressure. 
     
     
         29 . The system of any of  claim 19 , wherein the actuator further comprises a clamp between the dosing chamber and the fluid port, and the actuator is configured to close the clamp under negative pressure. 
     
     
         30 . The system of any of  claim 20 , wherein the actuator further comprises a clamp between the dosing chamber and the fluid port, and the actuator is configured to close the clamp under negative pressure. 
     
     
         31 . The system of any of  claim 21 , wherein the actuator further comprises a clamp between the dosing chamber and the fluid port, and the actuator is configured to close the clamp under negative pressure. 
     
     
         32 . The system of any of  claim 22 , wherein the actuator further comprises a clamp between the dosing chamber and the fluid port, and the actuator is configured to close the clamp under negative pressure. 
     
     
         33 . The system of any of  claim 23 , wherein the actuator further comprises a clamp between the dosing chamber and the fluid port, and the actuator is configured to close the clamp under negative pressure. 
     
     
         34 . The system of any of  claim 24 , wherein the actuator further comprises a clamp between the dosing chamber and the fluid port, and the actuator is configured to close the clamp under negative pressure.