Udi section, information is unknown.No information to date.Device is exempt.Device evaluation: one unit was returned for investigation.Upon physical inspection, it was found that the complained issue could not be duplicated.Observation of the returned breathing circuit and breathing bag revealed no abnormalities such as damage related to the reported event.Next, we conducted a leak test on the breathing circuit and breathing bag, but no leaks were confirmed.The reported event was not confirmed.The root cause was unable to be identified.The dhr review was done, no issues related to the original complaint were found.We will notify manufacturing site of the occurrence of this event and record this event in a database to monitor the future occurrence status.
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