The ventilator was investigated at site by our field service engineer.The nozzle unit in the gas modules and moisture trap and inspiratory pipe were found defective.After replacement, the ventilator passed all functional and safety tests and was cleared for clinical use.The nozzle unit is part of the gas module and regulates the inspiratory gas flow to the patient.It consists of a membrane, a mouthpiece and a feather spring.The membrane in the nozzle unit is pressed against a mouthpiece with a feather spring to regulate the gas flow through the gas module.No device logs were received and no replaced parts were returned for investigation, therefor the root cause for the reported problem could not be determined.
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