目的 探究冠脉CT血管造影(CTA) 在评估糖尿病患者冠脉临界病变管腔狭窄 程度中的应用。方法 回顾性分析2016年 5月至2017年5月于我院就诊的经冠状动 脉造影(CAG)检查确诊为冠脉病变临界病 变的62例2型糖尿病患者。所有患者均行 CTA检查，对患者血管狭窄率进行评价， 以CAG所测的狭窄率作为金标准，以50%作 为判断血管狭窄程度的边界值，计算CTA 检测的灵敏度、特异度及准确率，并比较 CTA与CAG测量结果的一致性。结果 CTA评 估冠脉临界病变的灵敏度为90.80%，特 异度为88.89%，阳性预测值为79.79%，阴 性预测值为95.23%，准确率为89.51%， CTA与CAG在冠状动脉狭窄性病变的诊断上 具有较好的一致性(Kappa=0.769)。结论 CTA在评估糖尿病患者冠脉临界病变管腔 狭窄程度时有较高的特异度、灵敏度、阴 性预测值及准确性，临床上可用于糖尿病 患者冠脉临界病变管腔狭窄程度检查。

Objective To explore the application of coronary CT angiography (CTA) in assessing the degree of luminal stenosis of coronary intermediate lesions in patients with diabetes. Methods A retrospective analysis was performed in 62 patients with type 2 diabetes mellitus and coronary intermediate lesions diagnosed by coronary angiography (CAG) who were admitted to the hospital from May 2016 to May 2017. All patients were examined by CTA, and the vascular stenosis rate was evaluated. With the stenosis rate measured by CAG as the golden standard, and 50% as the boundary value to judge the degree of vascular stenosis, the sensitivity, specificity and accuracy of CTA were calculated. The consistency of results of CTA and CAG was compared. Results The sensitivity, specificity, positive predictive value, negative predictive value and accuracy rate of CTA in assessing coronary artery stenosis were 90.80%, 88.89%, 79.79%, 95.23% and 89.51%, respectively. There was a good consistency between CTA and CAG in the diagnosis of coronary artery stenosis (Kappa=0.769). Conclusion The specificity, sensitivity, negative predictive value and accuracy of CTA are high in evaluating the severity of luminal stenosis of coronary intermediate lesions. It can be used for detecting the severity of luminal stenosis of coronary intermediate lesions in patients with diabetes.