To evaluate the safety and efficacy of LEO Baby stent-assisted coiling in the treatment of distal ruptured intracranial aneurysms in small artery.

The clinical data of 27 cases with ruptured aneurysms of distal intracranial small artery and treated with LEO Baby stent were analyzed retrospectively, all of whom were admitted in the Department of Neurosurgery of Jincheng People's Hospital from January 2019 to June 2021 . All 27 aneurysms were wide necked ruptured aneurysms, and were treated with single stent-assisted embolization and stent semi-release technology. All patients were treated with Tirofiban during perioperative period. Raymond grading was used to evaluate the immediate effect and aneurysm healing half a year after operation; modified Rankin scale (mRS) score was used to evaluate the recovery of neurological function half a year after operation.Those with mRS score≤ 2 had a good prognosis, and those with mRS score＞ 2 had a poor prognosis.

The stent was successfully released in 27 patients, and the technical success rate was 100%. Immediate postoperative angiography showed that 21 cases (77.8%) were Raymond grade Ⅰ, 4 cases (14.8%) were Raymond grade Ⅱ, and 2 cases (7.4%) were Raymond grade Ⅲ. Perioperative ischemic events occurred in 3 cases (11.1%), and no bleeding occurred. Six months after operation, 27 patients underwent cerebral angiography. There were 23 cases of Raymond Ⅰ (85.2%), 2 Raymond Ⅱ (7.4%), 1 Raymond Ⅲ (3.7%) , and 1 recurrence. No vascular stenosis and stent thrombosis occurred in all patients. The neurological recovery score of 27 patients half a year after operation showed that 25 cases (92.6%) had a good prognosis.

LEO Baby stent is safe and effective in the treatment for distal ruptured intracranial aneurysms in small artery, and has a certain blood flow guiding effect.