Accurate dose nitric oxide pulse delivery device with monitoring and alarms

A respiratory therapy apparatus delivering a dose of nitric oxide gas to a patient, said apparatus having an alarm system and comprising:

• a conduit adapted to be connected to a source of nitric oxide gas under pressure and to a patient,
• said conduit including a valve controlling the flow of the nitric oxide gas from the source to the patient,
• control means to open and close said valve at timed intervals by sending a signal to open said valve and a signal to close said valve to deliver accurate doses of the nitric oxide gas along the conduit to the patient,
• a sensor adapted to detect a condition of the dose of nitric oxide gas in said conduit,
• an alarm activatable to alert the user of a fault condition, and
• means to activate said alarm when a signal has been sent by said control means to close said valve and said sensor does not detect a corresponding change in the detected condition of the dose in said conduit indicative of the valve being moved to its closed position.

A respiratory therapy apparatus delivering a dose of nitric oxide gas to a patient, said apparatus having an alarm system and comprising:

• a conduit adapted to be connected to a source of nitric oxide gas under pressure and to a patient,
• said conduit including a valve controlling the flow of the nitric oxide gas from the source to the patient,
• control means to open and close said valve at timed intervals by sending a signal to open said valve and a signal to close said valve to deliver accurate doses of the nitric oxide gas along the conduit to the patient,
• a sensor adapted to detect a physical condition in said conduit,
• an alarm activatable to alert the user of a fault condition, and
• means to activate said alarm when a signal has been sent by said control means to open said valve and said sensor does not detect a corresponding change in a physical condition in said conduit indicative of the valve being moved to its open position.