Postoperative Glycemic Variability in Diabetic Orthopedic Patients: Association with DVT/Myocardial Infarction and Interactive Risk with HbA1c

Journal: Journal of Clinical Medicine Research DOI: 10.32629/jcmr.v6i3.4385

Ting Yu1, Dan Wu2

1. Department of Endocrinology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
2. Emergency and Disaster Medical Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China

Abstract

This study explored the association of postoperative glycemic variability with 30-day deep vein thrombosis (DVT) and myocardial infarction (MI) in diabetic orthopedic patients, and its interaction with glycated hemoglobin (HbA1c). A retrospective analysis of 826 diabetic patients undergoing elective major orthopedic surgeries (total hip arthroplasty [THA], total knee arthroplasty [TKA], spinal fusion) (2019–2024) was conducted. Glycemic variability indices included mean amplitude of glycemic excursions (MAGE), blood glucose standard deviation (SD), and maximum glycemic fluctuation (Max-G). Multivariate logistic regression and interaction analyses were performed. Results showed 109 (13.2%) DVT cases and 38 (4.6%) MI cases. After adjusting for confounders, each 1 mmol/L increase in MAGE was associated with 2.13-fold higher DVT risk (OR=2.13, 95% CI: 1.68–2.70, P<0.001) and 2.57-fold higher MI risk (OR=2.57, 95% CI: 1.81–3.65, P<0.001). Significant interaction between glycemic variability and HbA1c was observed (Pinteraction<0.05): in patients with HbA1c>9%, DVT (OR=3.02) and MI (OR=3.61) risks were higher than in those with HbA1c<7% (DVT: OR=1.58; MI: OR=1.87). Sensitivity analysis confirmed robustness. Conclusion: Postoperative glycemic variability (especially MAGE) is an independent risk factor for DVT/MI in diabetic orthopedic patients, with significant interaction with HbA1c. Strengthening glycemic variability management is crucial.

Keywords

diabetes mellitus, orthopedic surgery, glycemic variability, deep vein thrombosis, myocardial infarction, glycated hemoglobin

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