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Date of event: unknown.The date received by manufacturer has been used for this field.Investigation summary: 13 samples were received.Two came with no packaging blister; the other 11 samples came in sealed packaging blister.Visual inspection was performed.The two samples with no packaging blister were first examined; one has discolored needle the other one not.The other 11 needles in sealed packaging blister were also visually inspected, they do not have discoloration.One photo was provided.It shows two needle assemblies without the plastic shield.One has the needle with normal finishing/ color; the other has discoloration.This characteristic is cannula surface, not foreign matter.It is appearance.This discoloration occurred during the cannula processing; after this phenomenon was created, the needle is washed, clean, inspected.The discoloration will not come off.Additionally, as part of the needle assembly process a layer of silicone is applied to the needle.It would not come off if the surface is discolored even if it is rubbed with something.It is not a common issue, but we know about the phenomenon and where it can happen, as well as its avoidance.Clearly this is an escape.A device history record review was completed with zero defects found.No quality notifications were written for this batch, nor for the associated assembly batches.Investigation conclusion: complaints received for this device and reported condition will continue to be tracked and trended.Information will be captured on trend reports and monitored monthly.Our business team regularly reviews the collected data for identification of emerging trends.Root cause description: it happened during cannula drawing process.Rationale: capa not required at this time.
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