Describing normative foot temperatures in patients with diabetes-related peripheral neuropathy.
Allison, Sara   (University of Michigan-Ann Arbor)
Mentor: Schmidt, Brian (University of Michigan-Ann Arbor)
Prior research shows that increased foot temperatures are predictive of diabetic foot complications, such as ulcers and Charcot neuroarthropathy. Our study elucidates normative dermal foot temperatures for those with diabetic neuropathy (DN) in order to inform new technologies for detecting precursors to foot ulcer and Charcot—such as personal devices calibrated to alert patients with DN when their foot temperatures are abnormal. Previous research demonstrates warmer average foot temperatures in those with DN. To describe average foot temperatures in patients with DN, we conducted a retrospective chart review of 51 patients who were seen in podiatry between 2009 and 2018. We performed univariate and multivariate modeling based on covariates that may affect foot temperature including: age, peripheral arterial disease, seasonality of measurement, smoking pack years, caffeine use, insulin use, and calcium channel blocker use. Our preliminary data showed that those with DN have an average right midfoot temperature of 85.90 ± 4.09°F and average left midfoot temperature of 85.96 ± 3.89°F. We found that those with DN who also took calcium channel blockers had significantly higher foot temperatures (P=0.0548). A correlation between increased age and increased foot temperatures trended towards significance (P=0.0982). By the conclusion of the study, our sample size will be 300 and we will conduct a final analysis.