Interviews with the customer revealed that the expressed concern was related to the aspect that the readings of the jm-105 transcutaneous bilirubin (tcb) were almost 3 points lower than the total serum bilirubin (tsb) blood test results.The involved dräger device was subject to an in-depth evaluation whereby no deviations from specification could be found.Before the device was returned to the customer, a preventive maintenance was performed.In particular, the battery was replaced, an upgrade to the firmware was made and a recalibration was performed.Dräger came to the conclusion that the reported issue must be attributed to application aspects.Dräger recommends that - if the measurement with the jm-105 indicate the necessity of a blood gas analysis, the latter shall be performed within 60 minutes of time.It could be revealed that the lab testing at the user facility takes at an average 2 to 4 hours until results are available.It was concluded that this delay was the major factor for the divergence between the values of both measurement methods.Additionally, it could be revealed that even the jm-105 readings with the biggest divergence to the tsb results are still in the range to trigger the adequate clinical decision.
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