A flow/bubble sensor failure was reported during treatment.A getinge field service technician was sent for investigation on 2021-11-15.He could not confirm the failure.According to the technician the user reported the bubble alarms came fairly quickly at first, then slowly stopped appearing.The log files of the cardiohelp shows that the unit had multiple arterial bubble alarms that were cleared by the user.No unexpected bubble alarms could be confirmed.The unit was tested an put back in use.An exact root cause could not be identified.However, with reference to the current risk file the following possible causes could be linked to the reported failure: bubble intervention not working wrong information.Influence due to other ultrasonic devices (e.G.Flow sensor); environmental influences (atmospheric pressure, temperature, humidity, emi, overvoltage.Based on the investigation results, the reported failure "flow/bubble sensor failure" could not be confirmed.Furthermore, it could be confirmed, that the cardiohelp worked as per factory specifications.The occurrence rate related to the reported issue is currently being monitored as part of maquet cardiopulmonary¿s trending program and additional investigations or corrections will be implemented in case of adverse trending.
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