It was reported that on (b)(6) 2023, the anesthesia machine suddenly did not work during usage on patient.No patient injury.After confirming with the fse in sep, it was the pba control ii ((b)(4) ) caused the device malfunction.The quotation of the pba has provided to the hospital , waiting for the customer's reply.After confirming with the fse on 2023-11-13, the engineer from hospital resolved the problem by themself, didn't involve draeger.Based on the information, the root cause of the pba control ii could not be confirmed.The anesthesia machine was manufactured in 2010 and had been in use for 12 years,failure is possible due to wear or material fatigue of some components.; its maintenance and use were unknown, so the root cause of the accident could not be determined.If the sample returned, test lab will test returned pcb, and the root cause is to be investigated.Based on there was no returned parts, further analysis cannot be conducted.
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