T-SPOT. TB和结核菌素试验在骨关节结核诊断中的敏感性和特异性分析

目的分析结核感染T细胞免疫斑点试验(T-SPOT. TB)和结核菌素试验在骨关节结核诊断中的应用价值。方法收集2014年1月至2016年8月医院采用手术或保守治疗的骨关节结核患者94例,以及2016年2月至2017年1月骨外科收治的手术治疗的骨关节病患者50例作为研究对象,均进行结核菌素试验与T-SPOT. TB,对比2种方法的诊断效用。结果结核菌素试验诊断敏感性、特异性、阳性预测值、阴性预测值、符合率分别为46.81%、98.00%、97.78%、49.49%、64.58%,TSPOT. TB则为93.62%、100.00%、100.00%、89.29%、95.83%,结核菌素试验敏感性、阴性预测值、符合率低于T-SPOT. TB及2种方法联合检测,差异有统计学意义(P0.05)。T-SPOT.TB出现6例漏诊,均为早期脊柱结核病,表现为空洞形成,未见脊柱神经缺损。结核菌素试验出现1例误诊,50例漏诊,漏诊者主要病情相对较轻,伴风湿关节病等免疫疾病的患者。结论 TSPOT. TB是诊断骨关节结核病的理想方法,但存在干扰因素,需合理应用,结核菌素试验操作简单,尽管敏感性不足,但在结核病筛查中有一定的价值。

Analysis on the sensitivity and specificity of T-SPOT .TB and PPD test in the diagnosis of bone and joint tuberculosis

Objective To analyze the application value of T-SPOT .TB and PPD test in the diagnosis of bone and joint tuberculo-sis .Methods A total of 94 patients with tuberculosis of the bone and joint receiving surgery or conservative treatment from January 2014 to August 2016 were collected in this study ,50 patients with osteoarthritistreated by surgical treatment of bone surgery were recruited as objects too .All the objects received T-SPOT .TB and PPD test ,and the diagnosis value were compared .Results The diagnostic sensitivity ,specificity ,positive predictive value ,negative predictive value and accuracy of PPD test were 46 .81% , 98 .00% ,97 .78% ,49 .49% ,64 .58% ,those of T-SPOT .TB were 93 .62% ,100% ,100% ,89 .29% ,95 .83% .The sensitivity ,nega-tive predictive value and the coincidence rate of PPD test were less than those of T-SPOT .TB and joint test ,the differences were statistically significant(P<0 .05) ,T-SPOT .TB ,combined with the diagnostic sensitivity ,specificity ,positive predictive value ,nega-tive predictive value ,with rate no significant difference(P>0 .05) .Six cases were misdiagnosed by T-SPOT .TB ,they were all in the early stage of spinal tuberculosis ,showed cavities ,but no spinal nerve defect .One cases were erroneous diagnosis ,while 50 cases were misdiagnosed by PPD test ,all the symptoms of misdiagnosed patients were relatively mild ,with rheumatoid arthritis and other autoimmune diseases .Conclusion T-SPOT .TB is an ideal method for diagnosis of bone and joint tuberculosis ,but present interfer-ence factors ,the operation of PPD testis simply ,but lack of sensitivity ,however it has certain value in screening .