Surgical Treatment of Small Intestinal Bleeding Caused by Arterial Gastrointestinal Fistula: A 2-Case Report

Background: This study aims to better understand diagnosing and treating arterial gastrointestinal fistulas. Methods: The diagnosis and treatment of two patients with arterial gastrointestinal fistulas were reported, and the experience with diagnosis and treatment was summarized. Results: In these two cases, both patients were admitted with bleeding as the primary complaint, both underwent emergency laparotomies, and both patients were diagnosed with small intestinal bleeding before surgery. the first patient died as a result of an abdominal aortic aneurysm rupture caused by chronic vascular repair and postoperative implant infection;the second patient underwent vascular repair on time, we treated him with third-generation cephalosporin, and after he was stabilized, we performed left total iliac stent placement and left internal iliac artery embolization;he had no fever after surgery, his incision was healed, and he was successfully discharged from the hospital. Conclusion: Aortic gastrointestinal fistula is rare and has a high mortality rate, attention should be paid to distinguishing it from small intestinal bleeding. Timely diagnosis and rapid surgical treatment are keys to improving survival.

新疆某高校校园内大气主要污染物与学生呼吸系统症状的关系

目的调查与分析新疆某高校2016年采暖期校园内大气主要污染物与学生呼吸系统症状发生情况的关系。方法选用大流量采样器采集空气中颗粒物PM_(2.5),同时用小流量采样器采集空气样本测定二氧化硫及氮氧化物。采用随机抽样的方法抽取校内1 000名学生进行呼吸系统症状问卷调查,包括宿舍位置、开窗通风、学生是否吸烟等,分析暴露与症状的关系。结果 PM_(2.5)平均浓度为122.58μg/m^3(85.89~169.52μg/m^3),污染程度已达到国家的二级标准。当宿舍100 m范围内有交通要道时,呼吸系统症状的发生情况平均增加4.6%,吸烟(包含二手烟)较不吸烟呼吸系统症状的发生情况平均增加18.3%;宿舍开窗通风较少时,呼吸系统症状发生情况平均增加10.9%。结论空气污染(PM_(2.5))是该高校呼吸系统症状发生的危险因素,应广泛宣传大气主要污染物相关知识,及时预防,加强大气中PM_(2.5)的治理。