Patient information was not provided.Livanova (b)(4) manufactures the heater-cooler system 3t.The incident occurred in (b)(6).This medwatch report is being filed on behalf of livanova (b)(4).A livanova field service representative was dispatched to the facility to investigate.The service representative was unable to confirm the reported failure.The compressor was tested and was found to function as expected and the system compressor turned on when required.The facility biomedical engineer indicated that the relay was the issue, which the customer had already replaced.A performance test and technical safety inspection were completed without issue and the unit was returned to service.A review of the dhr did not identify any deviations or non-conformities relevant to the reported issue.As the issue could not be reproduced, a root cause was not determined.However, based on the report from the biomedical engineer, the likely root cause was a faulty relay.Issue resolved by customer.
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