This report is being submitted as follow up no.1 update section h3, and to provide the completed investigation results.The actual device was received for evaluation.Visual inspection revealed no obvious anomalies such as a break, in the appearance.The actual sample was rinsed and was built into a circuit with tubes.With a help of a roller pump, bovine blood at ht25% and 37oc was let to flow through the circuit.The bovine blood flowed through the actual sample.However, the blood started to leak out to the blood outlet side and pooled in the filtrate phase.A fiber leak was found.This prevented the ultrafiltration performance from being determined.Ifu states: adequate heparinization of the blood is required in order to prevent it from clotting in the system.The capiox hemoconcentrator is designed to operate at flow rates within the range of 100 to 500 ml/min during ultrafiltration.Do not use blood flow rates outside this range.Less than 100 ml/min blood flow may cause blood coagulation in the device.Do not exceed 50% hematocrit at the blood outlet during ultrafiltration.Do not stop blood flow during extracorporeal circulation as it may cause clotting in the system.A blood flow of least 50 ml/min is recommended even if ultrafiltration is stopped by clamping the filtrate line.Bubbles in the system may cause clotting and blood damage.Based on the provided information and investigation results, there is no definitive evidence that this event was related to a device defect or malfunction.Based on the complaint description, the actual sample was able to be used for 4.5 hours before the occurrence of clogging.It is likely that the actual sample was subjected to some shock force after the use, during transportation back to ashitaka factory and the fiber became cut.From the state of the actual sample, the exact cause of the reported event cannot be definitively determined based on the available information.
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