The user facility reported that during prime, the capiox device was leaking at the purge/connection of oxygenator base, on top of the oxygenator.The product was changed out.The surgery was completed successfully.There was no blood loss.There was no impact to the patient.
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This report is being submitted as follow up no.1 to provide the device return date in section and provide the completed investigation results.The actual device was returned for evaluation.Visual inspection upon receipt revealed that the purge lime tube had been almost fractured off at the joint with the port on the oxygenator module.No other anomaly was noted on the remainders of the device.The actual sample was built into a circuit with tubes and saline solution was flushed through the circuit by gravity drop, while the actual sample was observed for any leak.A leak was noted at the base of the purge line port.The fracture cross-sections of the purge line tube were inspected under magnification and electron microscopy.There was no foreign particle or air bubble which could have led the tube to get fractured embedded in the tube material.The surface of the fracture cross-section was noted partially in the smooth state and partially in the rough state.Functional testing was conducted.The purge line tube of a factory-retained oxygenator sample was exposed to excessive shock force by being hit at the edge of the purge line port with forceps.The purge line tube became fractured.There is no evidence that this event was related to a device defect or malfunction.Based on the investigation result, the cause of the reported leak is likely due to the fracture that occurred on the purge line tube at the edge of the purge line port on the actual sample.During the above investigation, no inherent deficiency was noted on the purge line tube of the actual sample.Based on the state of the fracture cross-sections of the purge line of the actual sample and the information that the reported leak occurred during priming, it is likely that the actual sample was exposed to some shock force during priming, resulting in the generation of the fracture on the purge line tube.However, it is difficult to determine when and how the actual sample was subjected to the shock force based on the available information.The ifu states: do not use an oxygenator that leaks.Recirculate the priming solution at a rate of 4l/min or higher to facilitate air removal.Failure to remove air from the oxygenator may result in serious injury to the patient.Use caution when removing air during priming and perfusion.Excessive shock to the device - especially with hard objects - can cause damage to the device.
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