Liquid ingress protection and design of electronic circuitry for negative pressure wound therapy systems

A negative pressure wound therapy system comprising:

• a negative pressure source configured to provide negative pressure to a wound covered by a wound dressing and to aspirate fluid from the wound;
• and
• a circuit board supporting a plurality of electronic components, the plurality of electronic components comprising control circuitry configured to control operation of the negative pressure source, the circuit board supporting a plurality of traces electrically connecting the plurality of electronic components, the plurality of traces comprising a first set of traces configured to transmit one or more digital signals and a second set of traces configured to transmit one or more analog signals,
• the control circuitry further configured to:
• detect a degradation of an electrical signal on at least one trace of the first or second set of traces, the degradation caused by one or more of an ingress of liquid onto the circuit board or condensation;
• and
• responsive to detection of the degradation of the electrical signal caused by one or more of the ingress of liquid or condensation, temporarily or permanently deactivate provision of negative pressure to the wound.