The patient was undergoing a thrombectomy procedure in the right m1 segment of the middle cerebral artery (mca) using a penumbra system red 72 reperfusion catheter (red72), a penumbra system red 43 reperfusion catheter (red43), a neuron max 6f 088 long sheath (neuron max) and a non-penumbra short sheath.It was reported that the patient presented with tandem occlusion.During the procedure, the red72 was advanced through the neuron max and the short sheath.The physician then advanced the red43 through the red72 to the target location and completed the first pass with the red43.In order to perform the second pass, the red72 was advanced without the red43 to the target location.While retracting the red72 under aspiration from the target vessel, the physician experienced resistance and noticed under fluoroscopy that the distal mid-shaft of the red72 had become stretched and fractured.Therefore, the red72 and the neuron max were removed together.It was reported that no issue was noted with the neuron max.The physician then opened a new neuron max and attempted to advance into the same short sheath; however, the physician experienced resistance and the neuron max would not fit into the short sheath.Therefore, the neuron max was not used in the procedure.The procedure was completed using non-penumbra catheters and a stent retriever.There was no report of an adverse effect to the patient.
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Evaluation of the returned red72 confirmed that the catheter was fractured.Evaluation revealed stretching near the fractured location and the support coil winds were exposed at the fractured location.If the red72 is retracted against resistance, it may become stretched and subsequently fracture.Based on the reported complaint, the root cause of resistance could not be determined.Further evaluation revealed stretching on the distal fractured segment.This indicates that the device likely became stuck during the procedure and may have contributed to resistance.Penumbra products are visually 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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