The mayfield ultra 360 patient positioning system (a3059) was returned for evaluation: device history record (dhr) - the dhr was reviewed, and no anomalies related to the reported failure was observed.Failure analysis - the investigation of the returned device found no device deficiencies that would have contributed to the reported complaint.Unrelated to the reported complaint, it was found that the unit was received without the standard or tri-star adaptor, and as a result, the unit had both handles readjusted to bring them back to within specifications.The shock cushions, adjustment wrench and finishing cap were replaced due to wear.All worn components were replaced with new parts, along with general maintenance and cleaning performed.Root cause - evaluation found no device deficiencies that would have contributed to the reported complaint.Service & repairs could not duplicate slippage.Probable root cause is improper or suboptimal positioning of the patient in the mayfield system.No further investigation required based on the acceptability of risk and no adverse trends identified.This will be monitored and trended going forward.
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