Multiple dressing negative pressure wound therapy system with calibrated leak paths

A method of operating a negative pressure wound therapy apparatus, comprising:

• monitoring a total rate of flow in a plurality of fluid flow paths configured to fluidically couple a negative pressure source to a plurality of wound dressings configured to be placed over a plurality of wounds, wherein the total rate of flow corresponds to an aggregation of a plurality of rates of flow associated with the plurality of fluid flow paths, wherein the plurality of fluid flow paths comprises at least a first fluid flow path configured to fluidically connect a first wound dressing with the negative pressure source and a second fluid flow path configured to fluidically connect a second wound dressing with the negative pressure source;
• and
• responsive to monitoring the total rate of flow, providing an indication of at least one operating condition by:
• at a first time, providing at least one of an indication that a canister full condition exists or an indication that a blockage condition exists in each of the plurality of fluid flow paths responsive to determining that the total rate of flow does not satisfy any of a first flow threshold, a second flow threshold, or a third flow threshold;
• at a second time, providing an indication that the blockage condition exists in the second fluid flow path responsive to determining that the total rate of flow satisfies the first flow threshold and does not satisfy the second flow threshold;
• at a third time, providing an indication that the blockage condition exists in the first fluid flow path responsive to determining that the total rate of flow satisfies the second flow threshold and does not satisfy the third flow threshold;
• and
• at a fourth time, providing an indication that a normal operation condition exists responsive to determining that the total rate of flow satisfies the third flow threshold,
• wherein the third flow threshold corresponds to higher flow than the first and second flow thresholds and the second flow threshold corresponds to higher flow than the first flow threshold, and
• wherein the method is performed by a controller of the negative pressure wound therapy apparatus.