Physical material review: visual examination was conducted on the returned complaint sample and showed that cracked on the female luer fitting of the red stopcock was observed upon receipt.The female luer fitting was connected to a male luer fitting of a non-argon tubing assembly device history record review: lot number was not provided for review however manufacturing process were reviewed and showed that no defect found and no indication of similar issue occurred during the manufacturing process.The review confirmed that all the operations, materials and tests were performed per manufacturing procedures.Kit¿s assembly goes through sampling outgoing inspection to check for any damaged or visual non-conformities that could affect the product functionality.Based on the above verification, analysis conducted on the sample review of the kits configuration and information provided in the per, it is concluded that the cause of the incident is due to the crack on the female luer fitting of the red stopcock.As per the kits configuration, the female luer fitting of the red stopcock was not connected to any devices, the cause occurred was likely due to mechanical stress incurred when tightening the connection with too much torque during product application.The crack propagated toward the housing from the tip of the female luer fitting of the stopcock.In the per, it mentioned that the products have been used for a week before the incident occurred, this indicated that the defect was likely contributed by the mechanical torque applied during product application.As the failure attributed outside the manufacturing process, no action will be taken.However, the production operators are made aware of the incidents and they were reminded not to over tighten the connections during assembly.Also, it is recommended to the user not to over tighten the connection during product used.This is to prevent unintended mechanical stress acting on the component which could cause crack on the device.
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