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 # 52140ev revealed no discrepancies that may have contributed to a complaint of this nature.All testing was performed and was within specification requirements.Final release potency testing was confirmed at 100.4% of label claim meeting the specification 93.0%-107.0%.Retained samples for the lot in question were visually inspected by (b)(4) qualified personnel and found to be within specification.Additionally smiths medical provided (b)(4) with 10 samples lot # 52140ev from the returned product and (b)(4) visual evaluation found no problem with the ampules.A 15 ampules lot # 52140ev from the returned by the customer product were forwarded by smiths medical to the accredited laboratory for potency testing.The results of the testing met specification 93.0%-107.0%.Possible causes of lack of effect may be administration technique or patient anatomical variations, including pathological or psychological factors.
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