Investigation summary: one sample protector unit was received for evaluation by our quality engineer team.Dhr could not be carried out as the lot number is unknown.Investigation conclusion: through visual inspection of the sample, grey and elastic foreign matter was observed.There were no defects found in the needles of the protector nor in the needle of the additionally returned injector product.Root cause description: coring from the membrane may occur due to fragmentation caused by multiple injections or excessive welding of the membrane.Coring of the rubber stopper may result depending on the stopper quality, the design and dimensions of the needles used, or if a poor connection of the protector occurs.Based on the type of foreign matter found, it is possible that it resulted from the rubber stopper.As there are several contributing factors for coring, an exact cause for this incident could not be determined.Rationale: a corrective and preventive action plan has been initiated to further investigate this issue and prevent its reoccurrence.Complaints received for this device and defect will be closely monitored by our quality team.
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