The anesthetic is a supplied item and the complaint notification was forwarded to the supplier.Batch record review performed by the supplier for bupivacaine lot # 31496ev revealed no discrepancies that may have contributed to a complaint of this nature.Retained file samples were tested for product potency.The results of potency testing met specification.Possible causes of lack of effect may be administration technique or patient anatomical variations, including pathological or psychological factors.
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