Analysis of Risk Factors for Deep Venous Thrombosis in Patients With Achilles Tendon Rupture: A Retrospective Study of 247 Patients

Background: and purpose The high incidence of deep venous thrombosis (DVT) was presented in patients with Achilles tendon rupture (ATR), and affects the prognosis of patients significantly. The purpose of this study was to identify and quantify the risk factors for perioperative DVT and the role of DVT in clinical outcomes, which may provide a guideline for DVT prevention and Achilles tendon repair. Methods The study was conducted on 247 patients who underwent surgical treatment for ATR at our institution from 2009 to 2019. Ultrasound results from injury to 4 weeks after operation were collected to diagnose DVT. Odds ratios (OR) were calculated using logistic regression to describe factors associated with DVT diagnosis including sex, age, body mass index (BMI), nicotine usage, mechanism of injury, rupture side, types of rupture, medical morbidity (hypertension, diabetes, coronary heart disease, stroke), time to operation, operative time and blood loss. The outcomes were assessed using the Achilles tendon Total Rupture Score (ATRS) and American Orthopaedic Foot and Ankle Society (AOFAS) Ankle Hind-Foot Scale Score at postoperative 3, 6, and 12 months. Results There were 216 males and 31 females with a mean age of 37.4 years (range from 20 to 75 years). Out of 247 patients, 113 patients were diagnosed with DVT during the perioperative period, accounting for 46 % of total patients. The independent risk factors were identified with age > 40 years (OR 0.41; 95% CI 0.21–0.82; p =  0.013), BMI > 26 (OR 0.39; 95% CI 0.19–0.79; p  = 0.009), traumatic ATR (OR 2.44; 95% CI 1.22–4.91; p =  0.012), operative time (OR 0.95; 95% CI 0.91–1.01; p =  0.028), and blood loss (OR 1.09; 95% CI 1.03–1.14; p =  0.001). Worse patient-subjective and functional outcomes were presented in patients with a perioperative DVT according to ATRS and AOFAS. Conclusions Routine thromboprophylaxis should be encouraged in patients with ATR requiring surgery, which was caused by trauma. Age > 40 years and BMI > 26 were important risk factors for perioperative DVT. This study also showed that the presence of DVT of patients with ATR in the perioperative period has clear impairment of outcome within one year after surgery, which may postpone the return of athletes to the field severely.