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The device was returned to zoll medical corporation.During the investigation it was noted that no event date was provided but a review of the device log on (b)(6) 2026 shows self-check faults triggered 3 times.Prior to the self-check faults several alarms were triggered multiple times.These alarms were observed throughout the device log history and are consistent with conditions associated with patient/circuit interaction issues, including leaks, kinked hoses, asynchronous breathing, defective or third-party patient circuits and/or incompatible patient settings.The ventilator successfully passed all stress and troubleshooting testing using a known-good test setup, with no inappropriate alarms observed.The flow screens were replaced as a precaution.The investigation is closed as observed in device data.The device was recertified and returned to the customer.Analysis of reports of this type has not identified an increase in trend.
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