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 in a plastic bag and two photos were received for evaluation by our quality team.A visual inspection was performed on the sample, first with a 10x magnifier lens, and then with a 30x microscope.No defects or imperfections were observed.In the two photos provided, one photo shows a rubber stopper assembled to the plunger out of the syringe barrel.The other photo shows a syringe barrel that has some lubricant at the bottom.This is normal and occurs after pressing the rubber stopper at the bottom of the syringe barrel.The lubricant is medical grade and added to the product to make the movement of the plunger rod-rubber stopper smooth.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.
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