Review of device history records and incoming records found no discrepancies or anomalies relevant to the complaint.The anesthetics are supplied items and the complaint notification was forwarded to the supplier.Records analysis was performed by the supplier for bupivacaine-marcaine lot #'s 641403a, epinephrine lot # 631353a, lidocaine lot #'s 642703a, 640603a, 641553a and confirmed that the reported lots continue to meet all specifications.Possible causes of lack of effect may be administration technique or patient anatomical variations, including pathological or psychological factors.
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