Fluid Collection Canister Including Canister Top with Filter Membrane and Negative Pressure Wound Therapy Systems Including Same

Abstract

A fluid collection canister including a chamber to collect fluids and a canister top disposed over the chamber. The canister top includes a bottom side facing into the chamber, including first and second ribs disposed thereon, a filter membrane attached to the first and second ribs, a first port to communicate with the chamber and a pressure source external to the chamber, and a second port to communicate with the chamber and a sensor external to the chamber. The first port is in fluid communication with a first area, which is bounded by the filter membrane, the first and second ribs and the bottom side of the canister top. The second port is in fluid communication with a second area, which is bounded by the filter membrane, the second rib and the bottom side of the canister top.

1 . A fluid collection canister, comprising:
 a chamber to collect fluids;   a canister top disposed over the chamber, the canister top including a bottom side facing into the chamber, the bottom side including first and second ribs disposed thereon;   a filter membrane attached to the first and second ribs,   a first port located on the canister top to communicate with the chamber and a pressure source external to the chamber;   a second port located on the canister top to communicate with the chamber and a sensor external to the chamber; and   wherein the first port is in fluid communication with a first area, the first area bounded by the filter membrane, the first and second ribs and the bottom side of the canister top, and   wherein the second port is in fluid communication with a second area, the second area bounded by the filter membrane, the second rib and the bottom side of the canister top.   
     
     
         2 . The fluid collection canister of  claim 1 , wherein the filter membrane is cut to a profile of the first rib. 
     
     
         3 . The fluid collection canister of  claim 1 , wherein the filter membrane includes a micro-pore filter membrane. 
     
     
         4 . The fluid collection canister of  claim 1 , wherein the first and second areas are pneumatically isolated from each other by the second rib. 
     
     
         5 . The fluid collection canister of  claim 1 , further comprising a third port to introduce the fluids into the chamber. 
     
     
         6 . The fluid collection canister of  claim 1 , further comprising a side wall to provide engagement of the canister top with an upper end of a peripheral wall of the chamber. 
     
     
         7 . The fluid collection canister of  claim 6 , wherein at least a portion of the first rib is disposed adjacent to the side wall. 
     
     
         8 . The fluid collection canister of  claim 1 , wherein the sensor is a pressure sensor. 
     
     
         9 . A portable negative pressure wound therapy system, comprising:
 a dressing assembly for positioning over a wound to apply a negative pressure to the wound; and   a canister assembly including:
 a control unit; 
 a vacuum source disposed in the control unit; 
 a pressure sensor in communication with the control unit; and 
 a collection canister including:
 a chamber to collect wound fluids from the dressing assembly; 
 a canister top disposed over the chamber, the canister top including a bottom side facing into the chamber, the bottom side including first and second ribs disposed thereon; 
 an inlet port in fluid communication with the dressing assembly to introduce the wound fluids from the dressing assembly into the chamber; 
 a suction port located on the canister top to communicate with the chamber and the vacuum source; 
 a pressure sensor port located on the canister top to communicate with the chamber and the pressure sensor; and 
 a filter membrane attached to the first and second ribs, 
 wherein the pressure sensor port is in fluid communication with a first chamber, the first chamber bounded by the filter membrane, the first and second ribs and the bottom side of the canister top, and 
 wherein the suction port is in fluid communication with a second chamber, the second chamber bounded by the filter membrane, the second rib and the bottom side of the canister top. 
 
   
     
     
         10 . The portable negative pressure wound therapy system of  claim 9 , wherein the control unit monitors and controls a negative pressure within the collection canister. 
     
     
         11 . The portable negative pressure wound therapy system of  claim 9 , wherein the first and second chambers are pneumatically isolated from each other by the second rib.