The zoom 55 catheter was returned for investigation.The investigation demonstrated severe damage to the distal and proximal portions of the catheter shaft including stretching, kinking, and separation of the shaft material.The manufacturing records for the zoom 55 were reviewed and demonstrated that the product met all the design and manufacturing specifications.Based on the complaint information provided and device investigation the exact root cause could not be determined.
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An 83-year-old patient was undergoing a thrombectomy procedure to treat an occlusion in the distal portions of the m2 segment.The patient had a type 3 arch, and the anatomy was reported to be tortuous.Access was obtained with a tracstar access catheter which was positioned at the petrous cavernous of the internal carotid artery (ica).A zoom 55 catheter was advanced through the tracstar to the face of the clot.A first pass was made with the zoom 55 without any issues.For the second pass, the physician advanced a third party microcatheter and stent retriever through the same zoom 55 to the clot.After the second pass, while retracting the stent retriever into the zoom 55, the distal portion of the zoom 55 shaft deformed and broke approximately 12cm proximal from the distal end of the catheter.With the stent retriever already through the zoom 55, the physician successfully removed the distal segment of the zoom 55 and stent retriever together.The physician did not continue with the procedure.The clot was partially removed, and the patient achieved partial reperfusion with a tici 2a score.The patient was reported stable, and no patient sequelae were reported.
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