The Application Of Temperature Detection To Screening Diabetic Patients With Lower Limb Angiostenosis

Objective: According to the detection of the difference between the axillary temperature and the foot temperature, the specialists found the diabetic patients who were suspected to be lower limb angiostenosis. And this study explored the clinical value on the early diagnosis of the lower limb angiostenosis patients with diabetic. And this study also evaluated this screening test, in order to provide an economic,woundless,convenient and pragmatic method of detecting the diabetic patients who were suspected to be lower limb angiostenosis in an early phase.Methods:100 diabetic patients lower limb with and without angiostenosis were collected by randomized sampling, matching by one to one. Axillary temperature,foot temperature,age and course of disease were detected respectively. All dates were processed by SPSS11.5 statistics software, charting receiver operating characteristic curve, the validity,reliability and benefit of this screening test were evaluated by nine indexes, including the sensitivity,rate of missed diagnosis,specificity,misdiagnosis rate,positive likelihood ratio,negative likelihood ratio,accuracy,positive predictive value and negative predictive value.Results: There were no significantly statistics differences in the age,sex and course of disease ( P>0.05) between the diabetic patients with and without lower limb angiostenosis. There were significantly statistics differences in the temperatures (the difference between the body temperature and the foot temperature) ( P<0.05) between the diabetic patients with and without lower limb angiostenosis. When the temperature difference between the body temperature and the foot temperature exceeded 6.35℃,it was choosed as cutoff point by receiver operating characteristic curve.The temperature difference sensitivity was 72 % ,the specificity was 60% ,the positive predictive value was 35.6 % , the negative predictive value was 87.5%,the accuracy was 66%,the positive likelihood ratio was 1.80,the negative likelihood ratio was 0.47.Conclusion: 1. The most diabetic patients who damaged the lower limb angiostenosis were involving in both lower extremities and widespread lower extremity periphery artery. especially distal artery below knees,such as ATA (Anterior tibial artery),PT A (Posterior tibial artery),PeA (Peroneal artery ) and DPA (Dorsalis pedis artery).2. Nowadays the prevention of vasculopathy of diabetic patient mainly focuses on the tertiary prevention, we could carry out the secondary prevention by the temperature difference between the axillary temperature and the foot temperature to detect the diabetic patients who were suspected to be lower limb angiostenosis in an early phase promptly and avoid delaying in the diagnosis and the therapy opportunity. Considering the situation of China and the economy is relatively backward, the skin temperature detection has a certain limitation, but we'll provide a convenient,economic and pragmatic method to the remote hospitals.