Siemens evaluated customer returned log files.Q325.Csv log files showed glucose on (b)(6) at 19:46 was 63, repeated at 20:01 and result was 100.An automatic quality control (aqc) sample was run after the two patient samples.It was also low and out of value assignment range after which the operator realized that the patient sample results may be in error.Conclusion of the reviewed log files: the glucose sensor had bubbles trapped over the active electrode that resulted with low slope, low sample recovery and low aqc recovery.The bubble caused the sensor to be unstable and resulted with several d2 drift errors.The bubble cleared at 19:48 and the sensor response became stable.The root cause of the issue could not be determined because the cartridge was not available for investigation.
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