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Objective: In diabetes patients through the axillary warm enough temperature difference detection found suspicious crowd of lower extremity vascular stenosis explore the early diagnosis of lower extremity vascular stenosis clinical value . And the evaluation of screening tests provide an economical , high-risk groups for the clinical early screening of diabetic lower extremity vascular stenosis , noninvasive , simple , practical method . Methods: random sampling in patients with diabetes , according to a 1:1 ratio method to collect blood vessels narrow lower limbs and the control group , 50 side , respectively, to detect axillary temperature , sufficient temperature , age and duration of other indicators , the resulting data application SPSS11.5 statistical software make the receiver operating characteristic curve (ROC curve) . And sensitivity, the rate of misdiagnosis , specificity , the rate of misdiagnosis , positive likelihood ratio, negative likelihood ratio , accuracy , positive predictive value , negative predictive value of the nine indicators of the authenticity of the screening test , reliability and screening tests the proceeds of the evaluation . Results: The diabetes patients of lower extremity vascular stenosis group with lower extremity vascular stenosis group between age , gender , disease duration was no statistically significant difference ( P gt ; 0.05) . The difference in temperature ( axillary temperature - enough temperature ) , a statistically significant difference ( P lt; 0.05 ) . ROC curve to determine the temperature difference gt; 6.35 ℃ as a cut-off point , the sensitivity was 72 % misdiagnosis rate of 28% , specificity of 60 % misdiagnosis rate of 40% , a positive likelihood ratio of 1.80 and a negative likelihood ratio of 0.47 an accuracy of 66 %, positive predictive value of 35.6% , negative predictive value of 87.5% . Conclusion: 1. Diabetic patients with lower extremity arterial disease , the majority of damage was lower limbs . Wide range of peripheral arterial involvement , especially below the knee the limb distal vessels , such as the anterior tibial artery , posterior tibial artery , peroneal artery , dorsalis pedis artery . Dorsalis pedis artery change heaviest . 2 diabetic lower extremity vascular disease prevention focused on tertiary prevention , secondary prevention of diabetic lower extremity vascular disease can be detected by the temperature difference , suspicious people in a timely manner to avoid delays in diagnosis and treatment of timing . Although the skin temperature detection limitations , combined with China's national conditions , the economy is relatively backward, to provide a simple, economical , practical detection method for grass-roots hospitals .
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