This report is being submitted as follow-up # 1 to provide the sample evaluation.Visual inspection found that the package cushion material had been deformed.It cannot be known when this damage was generated on the package.Visual inspection of the device found that the sampling line tube had been almost fractured at the joint with one of the ports on the venous blood inlet port located on the reservoir lid.There was no other anomalies noted.Magnifying and electron microscopic inspections of the fracture cross-sections of the tube found that some segments were in the smooth state and other segments in the rough state.On the smooth surface, the generation of some streaks were noted.No embedded foreign particle or entrainment of air bubbles was noted which would have contributed to the generation of the fracture.The tube was cut vertically and subjected to dimensional checks.No anomalies were revealed.Simulation testing was conducted.A current product sample was exposed to shock force at the joint of the sampling line tube and the port after it having been left under a low temperature of 4 °c for 12 hours.The sampling line tube became fractured at the joint.Electron microscopic inspection of the fracture cross-section found that the state of the surface was very similar to that of the actual sample.There is no evidence that this event was related to a device defect or malfunction.The exact cause of the reported event cannot be definitively determined based on the available information, it is possible that the actual sample may have been subjected to a shock force.The device labeling does address the potential for such an occurrence in the instruction for use (ifu) with the statement such as the following: (1) "do not use if the package or device is damaged (e.G.Cracked) or any of the port caps are off." (2) "do not use an oxygenator and reservoir that leaks." all available information has been placed on file in quality assurance at the manufacturing facility for appropriate tracking, trending and follow-up.
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