Status indication for negative pressure wound therapy

A negative pressure wound therapy system comprising:

• a negative pressure source configured to provide a negative pressure to a wound covered by a wound dressing via a fluid flow path that fluidically connects the negative pressure source to the wound dressing;
• a pressure sensor configured to measure pressure in the fluid flow path;
• and
• processing circuitry configured to control the negative pressure source, the processing circuitry further configured to:
• in response to determining that a first pressure value measured by the pressure sensor at a first time and a second pressure value measured by the pressure sensor at a second time are between high and low pressure thresholds:
• determine a first rate of pressure change using the first and second pressure values;
• and
• cause provision of a status indication in response to determining that the first rate of pressure change satisfies a threshold rate of change.

A method for controlling a negative pressure wound therapy system, the method comprising:

• causing provision of negative pressure to a wound covered by a wound dressing via a fluid flow path that fluidically connects the negative pressure wound therapy system to the wound dressing;
• in response to determining that a first pressure value measured in the fluid flow path at a first time and second pressure value measured in the fluid flow path at a second time are between high and low pressure thresholds:
• determining a first rate of pressure change using the first and second pressure values;
• and
• in response to determining that the first rate of pressure change satisfies a threshold rate of change, causing provision of a status indication,
• wherein the method is performed under control of a processing circuitry of the negative pressure wound therapy system.