Failure analysis: the surgical pattie (801407) was not returned for evaluation as the facility has kept and is holding on to the pattie product and we do not expect to receive it.Lot number information has not been provided; therefore, device history record (dhr) could not be reviewed the root cause(s) of the reported issue could not be determined.If additional relevant information becomes available in the future, this complaint will be reopened, and the respective evaluation performed.Trends will be monitored for this and similar issues.At present, we consider this complaint to be closed.Root cause: per the complaint background, brown stain.The root cause is undetermined and was unable to be confirmed in the complaint evaluation.A risk assessment and trending were performed as part of the evaluation.Product was not received for analysis and the investigation could not confirm the complaint.It is noted that this facility has had two other complaints that were confirmed as burn marks and they stated that this was the ¿same event¿.If these were indeed burn marks (unable to confirm without the physical product), then the potential root cause would be machine error or operator error.The risk remains acceptable per the risk analysis.Corrective/preventative action has been implemented to further investigate failures for the patties/strips product family which relate to discoloration.
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