The ventilator was investigated by our field service engineer.The reported event could not be duplicated.The ventilator passed all functional and safety tests and was returned to customer for clinical use.No parts were replaced.Provided ventilator logs indicate alarms for excessive leakage in the patient breathing circuit or a disconnect situation; expiratory minute volume low, vt insp.Overrange and peep low.Successful pre-use checks were performed prior and after the event.The technical log does not contain any technical error codes to indicate that there was a ventilator malfunction at the time of the event.The cause of the alarms has not been determined but they were most probably due to leakage.
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