User-friendly negative pressure wound therapy devices and methods of operating such devices

A negative pressure wound therapy device comprising:

• a negative pressure source configured to be connected, via a fluid flow path, to a wound covered by a wound dressing, the negative pressure source further configured to provide negative pressure to the wound;
• a canister configured to be fluidically connected to the negative pressure source via the fluid flow path and further configured to store fluid aspirated from the wound, the canister further configured to be disconnected from the negative pressure source and replaced by a replacement canister;
• and
• an electronic processing circuitry configured to monitor a rate of aspiration of fluid from the wound based on monitoring replacement of the canister and, responsive to determining that the rate of aspiration satisfies a threshold indicative of a transition to treating the wound with another negative pressure wound therapy system, provide an indication that the transition is recommended.

A negative pressure wound therapy device comprising:

• a negative pressure source configured to be connected, via a fluid flow path, to a wound covered by a wound dressing, the negative pressure source further configured to provide negative pressure to the wound;
• and
• an electronic processing circuitry configured to operate the negative pressure source to establish a target negative pressure at the wound, the target negative pressure selected from a plurality of negative pressure set points, the electronic processing circuitry further configured to:
• control the negative pressure source using a proportional-integral-derivate (PID) control loop that uses a first pair of integral and proportional gains associated with a first negative pressure set point and a second pair of integral and proportional gains associated with a second negative pressure set point different from the first negative pressure set point, integral and proportional gains of the first pair different from integral and proportional gains of the second pair.