Implanted date: device was not implanted.Explanted date: device was not explanted.Occupation: clinical engineer.The actual sample; only a sampling line tube connecting the oxygenator and the sampling system was received for evaluation.Visual inspection revealed a crack at approximately 400 mm from the female connector (at approximately 500 mm from the non-return valve).Normal saline was flowed in the actual sample with a syringe.As a result, it leaked from the crack.No leak was observed in the remainder part of the actual sample.Magnifying inspection of the crack found that it had penetrated the tube wall.In addition, a contact mark was found near the crack.Electron microscopic inspection of the crack revealed that it had a shape suggesting that a sharp object came into contact with that area.A review of the device history record and product-release judgement record of the involved product code/lot# combination was conducted with no findings.Ifu states: do not use an oxygenator and reservoir that leaks.Replace it with another capiox fx05 oxygenator and reservoir.Based on the provided information and investigation results, there is no definitive evidence that this event was related to a device defect or malfunction.It is likely that the leak occurred at the crack in the sampling line tube leading to the sampling system.As a cause of the generation of the crack, it is likely that a sharp object came into contact with the tube surface at some point during being handled from the assembling process to the actual use.However, the exact cause of the reported event cannot be definitively determined based on the available information.(b)(4).
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