Additional information provided in d9 and h3.Plant investigation: the actual device was returned to the manufacturer for physical evaluation.An external visual inspection was performed on the cycler with no physical damage noted.A post accelerated stress test (ast) 2 hour 15 min 8500 ml simulated treatment was performed on the cycler and passed.The cycler underwent and passed a system air leak test, valve actuation test, patient sensor calibration check, and voltage verification check.An investigation of the cycler mushroom heads verified that the surface conditions and alignments were within specification.An internal visual inspection of the returned cycler encountered no discrepancies.A review of the device manufacturing records was conducted by the manufacturer.There were no deviations or non-conformances during the manufacturing process.In addition, a device history record (dhr) review was performed and verified that the results of the in-progress and final quality control (qc) testing met all requirements.Upon completion of the evaluation, there were no malfunctions that could have caused or contributed to the reported event.The cycler performed as designed and an associated cause could not be determined.
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