The investigation included a review of the device history record (dhr), service history, trending of the product malfunction code, failure mode and effects analysis (fmea) and system hazard and user misuse analysis (shuma).The dhr was not reviewed as the lot number of the cassette was not available.The service history could not be trended as no lot number is available.The trend for the product malfunction code of skin reaction was assessed from may 2013 through april 2014.The risk highest risk is considered "as low as reasonably practicable." the fmea revealed the risk priority number (rpn) scores are considered to be acceptable.The shuma indicates the risk to be "broadly acceptable." no product was returned for further evaluation.Review of the tracking and trending data did not identify a trend.As a result, root cause or assignable cause analysis could not be performed.No further action is required; however, this issue will continue to be monitored.
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