Patent ID: 7451762

Claim:
A pressure sensing device adapted for coupling to a cannula and receiving respiratory breathing information from a patient to be monitored, the pressure sensing device comprising: an exterior housing accommodating an input port, and the input port being coupled to the cannula for receiving the respiratory breathing information from the patient to be monitored; the exterior housing accommodating a respiratory snore detection circuit for processing the received respiratory breathing information from the patient and outputting, via a pair of snore electrical leads, a signal indicative of sensed snoring of the patient; the exterior housing accommodating a respiratory airflow detection circuit for processing the received respiratory breathing information from the patient and outputting, via a pair of airflow electrical leads, a signal indicative of sensed airflow of the patient; and built-in test circuit for testing an integrity of the airflow electrical leads and the snore electrical leads, prior to use of the pressure sensing device, to ensure that the airflow and the snore electrical leads are operational.