A draeger service technician was dispatched after the event and was not able to reproduce the reported symptom.The technician tested the machine and reported that all tests passed.The electronic log file was provided for further root cause investigation.Based on the device log file records on (b)(6) 2015, the device was powered on at 7:31am.The subsequent power-on self test (post) was successfully completed at 7:35am.The case in question was started at 8:22am using man/spont and continued from 8:29am in volume mode.Just from the beginning the device repeatedly alarmed for apnea and according to the records minute volume leaks up to 10.4 l/min were present.The reported attempts to change the ventilation mode could be reproduced.The log entries indicate that between 8:33am and 8:42am the user switched between man/spont and several automatic ventilation modes multiple times.The situation persisted and several apnea, volume not attained and fg low or leak alarms were given while minute volume leaks up to 16.8 l/min were detected.At 8:42am the leakage problem was obviously resolved as ventilation was stable and unremarkable until the end of the case at 11:03am.The investigation has not revealed a device failure.A significant leakage in the patient circuit was identified as the root cause for the reported symptom.The machine has reportedly been returned to use with no further problems reported to date.
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