Date of event: unknown.The date received by manufacturer has been used for this field.Medical device expiration date: n/a two used samples were returned for evaluation.A visual inspection revealed the units were without the plunger cap or any packaging.Both returned syringes were tested to determine the shield removal forces and the removal forces fell within specification.A review of the device history record revealed no irregularities during the manufacture of the reported lot # 6207712.Conclusion: an absolute root cause for this incident cannot be determined as bd was not able to duplicate or confirm the customer¿s indicated failure mode.(b)(4).
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