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Device history record was reviewed and nothing was found related to the reported event.Device log was reviewed, several pressure sensor alarms the device was received in lake zurich for preventive maintenance during which our local technical team found a failure of the calibration of the downstream pressure sensor.The reported devices were not sent back to brézins for investigation as repairs were performed locally.According to provided information, the calibration of downstream pressure sensor failed.After the replacement of the pressure sensor, the cpu board found inoperative.Therefore, the downstream pressure sensor was replaced and sent back to brézins for further investigation.Once in brézins, a visual control was performed and nothing was noticed.Following visual inspection, cross-tests were performed.The downstream pressure sensor was installed in a test device.The tests device is connected to partner software to calibrate the pressure sensor.After validating step 1, nothing is displayed on the screen, then error 42 triggered.The reported event is considered as valid, and the root cause is likely due to a defective downstream pressure sensor.To our knowledge this complaint is not being related to patient safety.This complaint is considered as: valid.The trend is: normal.
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