Abstract
Residual ulceration (RU), characterized by contrast leakage outside the stent, frequently persists following carotid artery stenting (CAS) for ulcerative plaques. While it has been reported that approximately half of these disappear within 6 months, they can also potentially cause cerebral embolism postoperatively. This study aims to investigate the rate of RU disappearance and the incidence of thromboembolic complications in the case of using double-layer micromesh stents for ulcerative lesions. From April 2021 to March 2022, among 20 cases that underwent CAS, we used CASPER stents in 11 cases identified with preoperative ulcer formation. Cerebral angiography was performed 3 months postoperatively, and we evaluated the disappearance of RU and clinical symptoms. RU was observed in 10 out of 11 cases immediately after CAS. In the 9 cases who underwent follow-up angiography after 3 months, the RU disappearance rate at 3 months was 78% (7/9 cases). During a 1-year follow-up, none of the 9 cases experienced symptomatic cerebral infarction. In CAS for ulcerative lesions, the use of a double-layer micromesh stent resulted in a high rate of RU disappearance.
