Medical device expiration date: unknown.Device manufacture date: unknown.Investigation summary: it was reported there is excessive lubricant on the plunger in the syringe body.To aid in the investigation, one sample with no packaging blister and one photo were provided for evaluation by our quality team.A visual inspection was performed and no defects or imperfections were observed.The rubber stopper nor the inner barrel wall show an excess of silicone.In the two photos provided, one shows a syringe out of the packaging blister and the other shows a plunger rod with the rubber stopper out of the syringe barrel.As the lot provided is 'unknown,' a device history record review could not be completed.Based on the investigation and with the returned sample analysis the symptom reported by the customer could not be confirmed and a probable root cause could not be offered.
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