Reduced pressure therapy apparatus construction and control

An apparatus for applying a negative pressure wound therapy to a plurality of wounds, the apparatus comprising:

• a negative pressure source configured to be in fluidic communication via a flow path with one wound dressing covering one wound or two wound dressings covering two wounds;
• and
• a controller programmed to:
• activate the negative pressure source to provide negative pressure to the one wound in accordance with a first negative pressure setpoint;
• determine a first rate of flow in the flow path while a negative pressure wound therapy is applied to the one wound;
• determine a first threshold from the first negative pressure setpoint;
• detect a first blockage from a comparison of the first rate of flow and the first threshold;
• output a first indication of the first blockage;
• activate the negative pressure source to simultaneously provide negative pressure to the two wounds in accordance with a second negative pressure setpoint;
• determine a second rate of flow in the flow path while the negative pressure wound therapy is applied to the two wounds;
• determine a second threshold from the second negative pressure setpoint, the second threshold being different from the first threshold;
• detect a second blockage from a comparison of the second rate of flow and the second threshold;
• and
• output a second indication of the second blockage.