A review of the device history record could not be conducted as the lot number was reported as unknown.A sample analysis was not possible as there was no photographs or samples provided for evaluation.Without a sample to evaluate, the reported conditions could not be confirmed; therefore, a possible root cause cannot be determined or related to a manufacturing process.During the investigation, a review of the manufacturing process was conducted.In general, all process and controls were found properly followed, including sub-assemblies, finished product assembly and packaging.There were no abnormal conditions found that could trigger the reported condition.Based on the limited information and lack of a sample to analyze, a corrective action plan is not required.The current process is running according to product specifications meeting quality acceptance criteria.We will continue monitoring the process for any adverse trends that require immediate attention.
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