Instillation cartridge and therapy system for negative-pressure therapy and instillation therapy

Abstract

Systems, methods, and apparatuses for providing installation therapy and negative-pressure therapy are described. The apparatus includes a housing and a moveable barrier disposed in the housing to form a dosing chamber and a pressure chamber. The apparatus also includes a therapy conduit configured to be fluidly coupled to a pressure source and to a canister. The apparatus further includes a fluid inlet fluidly coupled to the dosing chamber and configured to be fluidly coupled to a fluid source and a fluid outlet fluidly coupled to the dosing chamber and configured to be fluidly coupled to a dressing. A pressure inlet is fluidly coupled to the therapy conduit and the pressure chamber; and a check valve is disposed in the therapy conduit.

What is claimed is: 
     
         1 . An apparatus for providing instillation therapy and negative-pressure therapy with a pressure source, the apparatus comprising:
 a dosing chamber;   a pressure chamber fluidly isolated from the dosing chamber;   a diaphragm separating the dosing chamber from the pressure chamber, the diaphragm configured to move between a charge position maximizing a volume of the dosing chamber and a discharge position maximizing a volume of the pressure chamber;   a conduit fluidly coupled to the pressure chamber and configured to be fluidly coupled to a source of pressure, and a tissue interface; and   a one-way valve fluidly coupled to the conduit and configured to prevent fluid flow toward the tissue interface.   
     
     
         2 . The apparatus of  claim 1 , wherein the pressure chamber is configured to receive positive pressure from the pressure source. 
     
     
         3 . The apparatus of  claim 1 , wherein the pressure chamber is configured to receive negative pressure from the pressure source. 
     
     
         4 . The apparatus of  claim 1 , wherein the pressure chamber is configured to receive positive pressure and negative pressure from the pressure source. 
     
     
         5 . The apparatus of  claim 1 , wherein the conduit is configured to receive positive pressure from the pressure source. 
     
     
         6 . The apparatus of  claim 1 , wherein the conduit is configured to receive negative pressure from the pressure source. 
     
     
         7 . The apparatus of  claim 1 , wherein the conduit is configured to receive positive pressure and negative pressure from the pressure source. 
     
     
         8 . The apparatus of  claim 1 , wherein:
 the pressure source comprises:
 a pump having a pump inlet and a pump outlet; 
 a selector valve fluidly coupled to the pump inlet and the pump outlet; 
 a pump pressure sensor; 
 a therapy pressure sensor; and 
 a controller communicatively coupled to the pump, the selector valve, the pump pressure sensor, and the therapy pressure sensor, the controller configured to operate the pump and the selector valve; and 
   the apparatus further comprises:
 a pressure-sensing conduit configured to be fluidly coupled to the therapy pressure sensor and the tissue interface; and 
 the conduit comprises a therapy conduit configured to be fluidly coupled to the selector valve; 
   wherein the controller is configured to actuate the selector valve to selectively apply positive pressure and negative pressure to the pressure chamber.   
     
     
         9 . An apparatus for providing instillation therapy and negative-pressure therapy with a pressure source, the apparatus comprising:
 a therapy conduit configured to be fluidly coupled on a first end to the pressure source and on a second end to a canister;   a housing having a fluid inlet configured to be fluidly coupled to a fluid source, a fluid outlet configured to be fluidly coupled to a dressing, and a pressure inlet fluidly coupled to the therapy conduit between the first end and the second end;   a moveable barrier disposed in the housing to form a dosing chamber and a pressure chamber, the fluid inlet and the fluid outlet in fluid communication with the dosing chamber, and the pressure inlet in fluid communication with the pressure chamber; and   a check valve fluidly coupled to the therapy conduit between the second end and the pressure inlet.   
     
     
         10 . The apparatus of  claim 9 , wherein the pressure chamber is configured to receive positive pressure and negative pressure. 
     
     
         11 . The apparatus of  claim 9 , wherein the therapy conduit is configured to receive positive pressure and negative pressure from the pressure source. 
     
     
         12 . The apparatus of  claim 9 , wherein the apparatus is configured to be fluidly coupled between the pressure source and the canister. 
     
     
         13 . The apparatus of  claim 9 , further comprising a pressure-sensing conduit configured to be fluidly coupled to the canister and a pressure sensor. 
     
     
         14 . The apparatus of  claim 9 , further comprising a biasing element coupled to the moveable barrier and operable to move the moveable barrier between a discharge position and a charge position. 
     
     
         15 . The apparatus of  claim 14 , wherein the biasing element comprises a spring. 
     
     
         16 . The apparatus of  claim 14 , wherein:
 the biasing element comprises a spring;   the spring is in a loaded position when the moveable barrier is in the discharge position; and   the spring is in an unloaded position when the moveable barrier is in the charge position.   
     
     
         17 . The apparatus of  claim 14 , wherein:
 the biasing element comprises a spring;   the spring is in a loaded position when the moveable barrier is in the charge position; and   the spring is in an unloaded position when the moveable barrier is in the discharge position.   
     
     
         18 . The apparatus of  claim 9 , further comprising:
 a fluid inlet valve fluidly coupled to the fluid inlet; and   a fluid outlet valve fluidly coupled to the fluid outlet.   
     
     
         19 . The apparatus of  claim 18 , wherein:
 the fluid inlet valve is a check valve permitting fluid flow into the dosing chamber; and   the fluid outlet valve is a check valve permitting fluid flow out of the dosing chamber.   
     
     
         20 . A coupling system for a therapy apparatus having multiple components, the system comprising:
 a tang coupled to a first component; and   a lever coupled to a second component, the tang configured to releasably engage the lever to inhibit relative motion between the first component and the second component, and the lever operable to permit separation of the first component and the second component.   
     
     
         21 . The system of  claim 20 , wherein the first component comprises a pressure source. 
     
     
         22 . The system of  claim 20 , wherein the second component comprises a cartridge. 
     
     
         23 . The system of  claim 20 , wherein the tang is a first tang, the lever is a first lever, and the system further comprises:
 a second tang coupled to the second component; and   a second lever coupled to a third component, the second tang configured to releasably engage the second lever to inhibit relative motion between the second component and the third component, and the second lever operable to permit separation of the second component from the third component.   
     
     
         24 . The system of  claim 23 , wherein the third component comprises a canister.