The device history records (dhr) of the device concerned was reviewed: the production lot, to which the device concerned belongs, passed all in-process inspections for every product, and the finished product inspections on representative samples based on sampling plan.No nonconformity or abnormality in the manufacturing processes of the device concerned was found.Results of the investigation on returned concerned device: the distal shaft was kinked at 83mm, 101mm, and 114mm, and deformed at 135mm and 213mm from the distal tip.The outer shaft was torn at 283 to 403mm toward the gw port.The catheter shaft was elongated and torn to separate at 512mm.We assume the cause of this as follows: factors that may contribute to shaft breakage include, but are not limited to, the operator delivered the actual device from the tip of the sheath until the gw port of the product came out.Therefore, when the actual device was tried to remove from the sheath, the gw used in combination for some reason became slack at the sheath tip and formed a loop.In that state, the operator further pulled the actual device, so the gw lumen (gw port) of the product was torn in the distal direction by the gw, and the shaft of the product was broken.In the instructions for use of r2p metacross rx (3227-1) , we state the potential of known risk as below; [precautions during usage] this catheter should be used only by physicians skilled in percutaneous vascular therapy.Use this catheter only when emergency surgery can be performed at any time.If any abnormality such as strong resistance is experienced while manipulating the catheter, the procedure should be discontinued immediately.The cause should be verified and appropriate measures should be taken.(continuing the operation with excessive force may result in damage to the catheter or in vascular wall injury.) if resistance is felt during post procedural withdrawal of this device, it is recommended to withdraw the entire system together with the introducer / guide sheath.
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