A thorough evaluation on the returned system was conducted.A technical safety check was performed on each unit.This included an electrical safety check, a function check of each of the equipment's features, and a power output check.Also, the gas flow rates were measured and found to be within their acceptable ranges for the apc.All features were/are functioning properly within specifications on both devices.In addition, no anomalies were found in the device history records (dhrs) for the apc and esu.In conclusion, no erbe equipment problem was found that would have caused or attributed to the event (note: unrelated to the reported issue and to further meet the customer needs, some unrelated software update work was performed on the system upon an initial evaluation of the units).The report of higher output was not found.All outputs were within specifications.Also, a review of the system's chronological log revealed that the system was not activated in the forced apc mode as the customer reported.Twenty activations of pulsed apc mode occurred as intended within an eight (8) minute period on the date of the reported incident.Most likely there were many factors involved in the reported event.However, it appears that upon the intervention, the remaining wall did not stay intact which resulted in the perforation.Nonetheless, no conclusive determination could be made as to the cause of the incident.The account is being made aware of the findings.To further address the issue, additional in-service training is being offered to the involved medical staff.Erbe usa, inc.Is now closing the file on this event.
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