The assigned field service engineer (fse) was able to duplicate the event and noted that it was intermittent.The fse attributed ecg environmental interferences caused, mainly, by the ambulance inverter.No malfunction of the tempus pro was observed, the device is fully functional.Philips conducted a technical investigation of the customer's site and the ambulance manufacturer to further elucidate the source of the electromagnetic (emc) noise.The fse provided the customer with best practices for use.The reported problem was confirmed.Based on information obtained from site visits and device testing through recreation of similar emc noise environments, the customer was advised on equipment upgrades, adjustments to filtering settings, and improvements to ecg techniques.Based on the information available and results of additional analysis further action has been initiated.A review of the risk management file was performed, and the potential severity is s2 has been identified in the risk document.The data entered in this complaint record will be utilized for product quality and safety improvements per the post market surveillance and risk management processes.The customer was provided with recommendations on how to address the issue.It has been concluded that no further action is required at this time.If additional information is received the complaint file will be reopened.
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