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Manufacturing review: based on the information available and the investigation performed, there is no indication that the product failed to meet its specification prior to shipment.The lot records have been reviewed with special attention to the manufacturing and inspection of this product and the product was found to have met the specification prior to shipment.The review shows that no remarkable incidents occurred during the manufacturing process.No relevant manufacturing process changes were implemented, that could have led to the event reported.Investigation summary: based on the investigation of the returned catheter sample it was confirmed that the outer sheath broke; the outer sheath was found fractured with signs of torsion at the fracture site.Allegedly, the deployment was slow but successful, and it was not known when and how the fracture occurred.Images documenting deployment have not been provided so that a slow deployment could not be confirmed.The sample condition did not match the information provided so that the reported event could not be re produced which led to an inconclusive evaluation result.As a result of the investigation performed the complaint is inconclusive.A definite root cause for the reported event could not be determined.Labeling review: in reviewing the applicable labeling for this product it was found that the instructions for use (ifu) sufficiently address the potential risk.The ifu states: 'if unusual resistance or high deployment force is encountered during stent graft deployment, abort the procedure, remove the delivery system and use an alternative device.' regarding the anatomy of the placement site the ifu states: 'the safety and effectiveness of the device when placed across a tight bend including the terminal cephalic arch or across the elbow joint has not been evaluated.', and 'prior to stent graft deployment, ensure that the proximal (inflow) stent graft end is positioned in a straight section of the lumen to reduce the risk of higher deployment forces and possible endovascular system failure.' furthermore, the ifu states: 'prior to loading the endovascular system over a guide wire, both ports must be flushed with sterile saline (¿).Flushing these lumens will also facilitate stent graft deployment.' in addition, the release action of the stent graft including correct holding was found addressed in the ifu.
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It was reported that during deployment of an endovascular stent graft in the mid-cephalic vein, the first two cm of the stent graft deployed without issue, but the remaining length of the stent graft allegedly deployed slowly.The procedure was completed without incident.There was no reported patient injury.
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