It was reported that while the patient was prepared for an internal transport an m540 patient monitor was connected to the patient.The monitor reportedly indicated a changed battery, but while connecting the cables it turned off.The user does not remember whether the device generated an alarm.After that another m540 was taken to monitor the patient.During the transport, after about 3 minutes, this monitor turned off, too.According to the user it notified the user about the critical battery-charge with a red battery symbol and gave an acoustical alarm.There was no injury reported.
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