Depression as a Prognostic Factor in Lower Extremity Amputation for Diabetic Foot: Insights From a Prospective Study on Wound Healing, Infections, and Early Mortality

Abstract

This study addresses the challenges faced by diabetic patients undergoing lower extremity amputation due to diabetic foot, particularly focusing on the implications for wound healing and early mortality. The wounds at the amputation stump may necessitate multiple surgical interventions. The aim is to identify prognostic factors associated with these outcomes, shedding light on the complexities surrounding the postamputation phase. A prospective study was conducted on 39 diabetic patients who underwent lower extremity amputation due to diabetic foot between 2021 and 2022. Comprehensive preoperative data, encompassing parameters such as blood count, erythrocyte sedimentation rate, C-reactive protein, procalcitonin, hemoglobin A1c, albumin, protein, transferrin, ferritin levels, age, gender, body mass index, smoking habits, dialysis, revascularization, duration of surgery, and the use of tourniquet during the procedure were meticulously recorded. Additionally, cognitive performance and depression status were assessed preoperatively using the Mini-Mental State Examination (MMSE) and Beck Depression Inventory (BDI), respectively. A follow-up period of 3 months postsurgery allowed for the comparison of patients who developed infections at the amputation stump with those who did not, as well as the distinction between patients who survived and those who succumbed to mortality. The study revealed that the use of a tourniquet during surgery significantly increased the risk of infection (p = .027), and higher BDI scores were associated with increased risks of both infection (AUC = 0.814) and mortality (AUC = 0.769), with cut-off scores of 24.0 and 23.5 predicting these outcomes with high sensitivity and specificity, respectively. Additionally, lower MMSE scores were associated with increased short-term postoperative mortality. There were no statistically significant differences between the groups in parameters such as complete blood count, ESR, CRP, procalcitonin, HbA1c, albumin, total protein, transferrin, ferritin levels, age, gender, BMI, smoking, dialysis, revascularization, and surgery duration. This investigation highlights the significance of considering tourniquet usage during amputation, preoperative depression status, and cognitive function in patients who undergo amputation due to diabetic foot. The use of a tourniquet during surgery is a significant risk factor for infection, and elevated BDI scores are strong predictors of both infection and mortality in patients undergoing amputations. The findings underscore the importance of a multidisciplinary neuropsychiatric evaluation preoperatively to enhance patient care and outcomes.