红外热成像技术对下肢深静脉血栓的诊断分析

目的 分析红外热成像技术对下肢深静脉血栓的诊断价值,旨在为临床诊断提供参考依据,以提高诊断结果的准确率。 方法 选取绍兴市人民医院2018年9月—2019年9月诊治的92例临床可疑下肢深静脉血栓患者,所有患者都行彩色多普勒超声检查与红外热成像技术检查,2项检查都在同一时间段(间隔时间控制在30 min内),对比分析其对中央型、周围型、混合型下肢深静脉血栓的检出结果,并以彩色多普勒超声的诊断结果为金标准,分析红外热成像技术的诊断价值,计算准确度、敏感度、特异度、阳性预测值、阴性预测值。 结果 彩色多普勒超声检出下肢深静脉血栓54例,检出率是58.7%;红外热成像技术检出下肢深静脉血栓58例,检出率是63.0%;2组的检出率相近,差异无统计学意义(χ2=0.365,P=0.546)。以彩色多普勒超声的诊断结果为金标准,经计算,红外热成像技术诊断下肢深静脉血栓的准确度、敏感度、特异度、阳性预测值、阴性预测值分别是71.7%、74.1%、67.6%、79.6%、60.5%。 结论 红外热成像技术对下肢深静脉血栓的诊断具有一定的应用价值,检出率与彩色多普勒超声相近,具有检查时间短、可大批量检查的优势,可作为临床筛查可疑下肢深静脉血栓的辅助手段,值得推行。 

Diagnostic value of infrared thermography in deep venous thrombosis of lower extremities

Objective To analyze the diagnostic value of infrared thermography in deep venous thrombosis of lower extremities, in order to provide reference for clinical diagnosis and improve the accuracy of diagnosis. Methods Ninety-two patients with suspected lower extremity deep venous thrombosis were selected from September 2018 to September 2019 in Shaoxing People's Hospital. All patients underwent color Doppler ultrasonography and infrared thermography. Both examinations were performed in the same time period(interval time was controlled within 30 minutes). The detection results of central, peripheral and mixed deep vein thrombosis of the lower extremity were compared and analyzed. The diagnostic results of color Doppler ultrasound were gold standard. The diagnostic value of infrared thermography was analyzed. The accuracy, sensitivity, specificity, positive predictive value and negative predictive value were calculated. Results Fifty-four cases of deep venous thrombosis of lower limbs were detected by color Doppler ultrasound, the detection rate was 58.7%. Fifty-eight cases of deep venous thrombosis of lower limbs were detected by infrared thermography, the detection rate was 63.0%. The detection rates of the two groups were similar, the difference was not statistically significant(χ2=0.365, P=0.546). With the diagnostic results of color Doppler ultrasound as the gold standard, the accuracy, sensitivity, specificity, positive predictive value and negative predictive value of infrared thermography in the diagnosis of lower extremity deep venous thrombosis were 71.7%, 74.1%, 67.6%, 79.6% and 60.5%, respectively. Conclusion Infrared thermography has certain application value in the diagnosis of lower extremity deep venous thrombosis. The detection rate is similar to that of color Doppler ultrasound. It has the advantages of short examination time and large-scale examination. It can be used as an auxiliary means for clinical screening of suspected lower extremity deep venous thrombosis and is worth promoting.