It was reported that a defective flow/bubble senor was detected during treatment.No harm to the patient was reported.The customer ordered a new flow/bubble sensor and has replaced that by his local team.The defective flow/bubble sensor is not available for investigation.Therefore, an exact root cause could not be determined.However, with reference to the current risk file, the following possible causes could be linked to the reported failure: - influence due to other ultrasonic devices (e.G.Flow sensor); - bubble sensor not plugged but recognized; - connection of non-compatible sensor; - environmental influences (atmospheric pressure, temperature, humidity, emi, over voltage); - sensors are disturbed by external electric or magnetic field (emi) or ultrasonic system.Based on this investigation results the reported failure "defective flow bubble sensor" could be confirmed.The occurrence rate was calculated for the reported issue and it was determined that this is not a systemic issue.Therefore, no remedial action is required.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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