The actual device was returned for evaluation.Visual inspection revealed no anomalies.The actual sample was built into a circuit with tubes and colored saline solution was circulated in it, while being observed for any leak.No leak was confirmed.The oxygenator module was filled with saline solution.With the blood outlet port side clamped, an air pressure of 2kgf/cm2 was applied to the blood phase from the blood inlet port.No leak was confirmed.Magnifying inspection of the joint of the sampling line tube with the port on the oxygenator module did not reveal any anomaly, including a crack.Electron microscopic inspection of the joint of the sampling line tube with the port on the oxygenator module did not reveal any anomaly, including a crack or defective insertion of the tube to the port.A review of the manufacturing record and shipping inspection record of the involved product/lot# combination was conducted with no relevant findings.There is no evidence that this event was related to a device defect or malfunction.The investigation result verified that the actual sample was of the normal product without any crack which would lead to a leak.(b)(4).
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