关键词: 动脉性下消化道出血, 同轴微导管, 聚乙烯醇颗粒, 介入栓塞, 止血效果

Abstract: Objective To study the effect of coaxial microcatheter PVA embolization in the treatment of patients with arterial lower gastrointestinal bleeding．Methods This study is a prospective study,118 patients with arterial lower gastrointestinal bleeding admitted between January 2022 and June 2023 were selected as the study subjects．They were randomly divided into a conventional group（59 cases）and an experimental group（59 cases）using computer randomization．Both groups underwent digital subtraction angiography examination to determine the bleeding situation．The conventional group received conventional endoscopic hemostasis treatment,while the experimental group received coaxial microcatheter PVA embolization for hemostasis treatment．The treatment efficacy and prognosis were compared between two groups．Results Under different treatment plans,the technical success rate and clinical success rate of the experimental group were 89.83%（53/59）and 84.75%（50/59）,respectively,which were higher than those of the conventional group [71.19%（42/59）and 64.41%（38/59）]（χ²=11.071、10.911,P<0.05）．The hemostatic time,PT,and TT of the experimental group were（50.25±10.37）min,（10.25±2.31）seconds,and（16.33±4.47）seconds,respectively,which were shorter than those of the conventional group [（55.36±10.72）min,（12.44±3.61）seconds,and（19.35±4.23）seconds]（t=2.632、3.925、3.769,P<0.05）．The arterial PI and RI of the experimental group after treatment were（1.12±0.33） and（0.51±0.21）,lower than those of the conventional group [（1.65±0.41）and（0.73±0.22）]（t=7.735、5.556,P<0.05）．The rebleeding rates of the experimental group after 7 days,14 days and 30 days of treatment were 5.08%（3/59）,8.47%（5/59） and 10.17%（6/59）,respectively,which were lower than those of the conventional group [20.34%（12/59）,25.42%（15/59） and 28.81%（17/59）]（χ²=10.495,10.207,11.071,P<0.05）．The incidence of complications in the experimental group was 8.47%（5/59）,which was lower than that in the conventional group 22.03%（13/59）（χ²=7.113,P<0.05）．Conclusions Compared with conventional endoscopic hemostasis,coaxial microcatheter PVA embolization can significantly improve the success rate of hemostasis in patients with arterial lower gastrointestinal bleeding,shorten the hemostasis time,promote coagulation system recovery,reduce the risk of rebleeding and related complications,with a positive significance．

Key words: arterial lower gastrointestinal bleeding, coaxial microcatheter, polyvinyl alcohol particles, interventional embolization, hemostatic effect