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The device history record (dhr) was reviewed, and no abnormal process conditions were present during the manufacturing of the product that could have led to the condition described by the customer.A sample analysis was not possible as there were no samples provided for evaluation.Without a sample to evaluate, a more complete investigation cannot be performed, and the reported condition cannot be confirmed.Possible causes for the syringe to not draw insulin as designed could be that the cannula is partially plugged or occluded.Plugged or occluded cannula may occur if the insulin crystallized, if there is uneven distribution of silicone, or improper technique.Occluded cannula detectors are installed on the assembly machines and are checked each shift to ensure that they are working properly.If the silicone is unevenly distributed, exercising the plunger would redistribute the silicone in the barrel and on the rubber tip.These syringes are designed to be a single use syringe.Another possible cause for the syringe to draw air could be from the hooded needle assembly to not be fully seated on the luer tip of the syringe.The assembly process is not intended to ensure the needle assembly is fully seated.The packaging documents the instructions for use and requires the user to secure the needle assembly to the syringe.Control mechanisms are in place to prevent the occurrence and acceptance of the reported condition during molding, printing, assembly, and packaging processes, and to ensure components and finished product meet all quality inspection standards during the syringe assembly processes.A lot cannot be released unless it passes specification requirements.Complaint trends are evaluated during a monthly meeting to determine if a formal corrective/preventative action (capa) is warranted.At this time, there is not enough information to escalate a capa.
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