Investigation - evaluation.A review of the complaint history, drawings, dimensional verification, device history record, documentation, instructions for use (ifu), manufacturing instructions, quality control, functional testing and visual inspection of the returned device was conducted during the investigation.Three three-way plastic stopcocks were returned for evaluation along with and photos of the complaint device.Stopcock #1 had a 2 mm crack at the base.Stopcock #2 had a 4 mm crack at the base; and stopcock #3 had a n11 mm crack from the base to the connecting lumen.All three stopcocks failed leak testing.A document based investigation evaluation was also performed.There is no evidence to suggest the product was not made to specifications.Review of device history record shows no nonconforming events which could contribute to this failure mode.It should be noted there were no other reported complaints for this lot number.Based on the information provided and the results of the investigation, a definitive root cause cannot be determined.We will continue to monitor for similar complaints.Measures are being conducted to address this failure mode.Per the quality engineering risk assessment no further action is required.
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