It was reported that foreign matter was present on the device.The target lesion was located in the severely tortuous internal carotid artery.An 8.0-29 carotid wallstent stent was selected for treatment.However, during preparation, the tail of the previously inserted 14 non- boston scientific guidewire did not come out of the monorail port of the wallstent.The preparation was restarted but did not solve the problem.Upon inspection of the monorail port of the stent, a foreign matter was stuck in it.The procedure was successfully completed with an 8x21 carotid wallstent.There were no patient complications nor injuries reported.
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