The patient was undergoing a thrombectomy procedure in the m2 segment of the middle cerebral artery (mca) using a benchmark bmx96 access system (bmx96), a penumbra system red 62 reperfusion catheter (red62), a velocity delivery microcatheter (velocity), and a guidewire.During the procedure, the physician placed the bmx96 into the left common carotid artery, and then advanced the red62, velocity, and guidewire through the bmx96 and into the target vessel.The velocity and guidewire were then removed.While retracting the red62 to complete the first pass, the physician experienced resistance.It was reported that the physician believes that the bmx96 moved into the external carotid artery, causing force on the red62 and subsequent kink and break of the red62 since it was already advanced into the m2.It was reported that the distal 25 centimeters of the red62 remained in the patient from the m2 all the way down to the external carotid artery.The physician then used a stent retriever device to pull the proximal end of the red62 back into the common carotid artery.The physician then attempted to deploy the stent retriever device against the red62 to pull it out, but it rolled over the red62.Next, the physician attempted to use a 4mm snare device to retrieve the red62, however, the attempt was unsuccessful.The physician then placed two new stent retriever devices side by side in the cavernous segment of the ica and was able to wedge the red62 between them and was able to retract the red62 out along with pulling back on the bmx96 simultaneously.It was noted that a vasospasm occurred in the internal carotid artery (ica) after the removal of the red62 and no medical intervention was performed to treat the vasospasm.The physician then made two attempts to open the m2 segment using a non-penumbra sheath, a non-penumbra catheter, and a stent retriever device; however, was unsuccessful.The procedure ended at this point.It was reported that there was no relationship between the red62 and the vasospasm.
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Evaluation of the returned red62 confirmed that the catheter was fractured.If the red62 is retracted against resistance, damage such as a fracture may occur.Based on the reported complaint, the catheter may have become pinned within patient anatomy.This may have contributed to the resistance that caused the catheter to stretch and fracture upon retraction.Further evaluation revealed kinks in the catheter shaft.This damage was incidental to the reported complaint and may have occurred during snaring of the device or packaging for returned to penumbra.Penumbra catheters are inspected during in-process inspection and during quality inspection after manufacturing.The manufacturing records for this lot were reviewed and did not reveal any outstanding discrepancies, design, or quality concerns.
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