The investigation into this complaint has been completed.The anesthesia system was investigated on-site by our field service engineer and the patient cassette was replaced.The reported issue has not re-occurred after this.The patient cassette was returned for investigation and device logs were received.The returned patient cassette was tested in a reference system.The system checkout passed without deviations and simulated use testing was performed during several days.The reported failure was not reproduced during investigation of the patient cassette.Evaluation of the received device logs shows that system checkout performed prior to and after the reported event were successful.The reported alarms were confirmed.There are no recordings in the technical log indicating any technical malfunction in the system.The conclusion, based on that the reported issue has not reoccurred after replacement of the patient cassette, is that the reported leakage alarms most probably were caused by an expiratory flow measuring error.The cause of the airway pressure high alarms has not been determined.
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