Enoxaparin initiation after chronic subdural haematoma evacuation: a randomized clinical trial on timing and outcomes

Abstract

AbstractAimPatients with chronic subdural haematoma (CSDH) are at a significant risk for venous thromboembolism (VTE). Surgeons should weigh the advantages versus disadvantages of anticoagulants in the postoperative period.Patients and MethodsThis study was a randomized clinical trial conducted in Isfahan, Iran, from May 2016 to April 2021. Patients with CSDH eligible for bur‐hole craniostomy were primarily enrolled. All of them underwent bilateral lower limb Doppler ultrasonography (DUS) for deep venous thrombosis (DVT) screening. The patients were randomized into the case (n = 66, enoxaparin initiation 24 h after operation) and control (n = 70, enoxaparin initiation 72 h after operation) groups. Routine postoperative brain computed tomography scans were obtained 1 and 3 days after surgery. A second DUS was performed 96 h after operation to screen newly developed venous thrombosis; P value <.05 was defined significant.ResultsA total of 73 patients (59.8%) were female and 49 (40.2%) were male. The mean age was 65.1 ± 10.19 years; 9.9% of the patients had previously used antiplatelets. One patient had asymptomatic preoperative DVT. The mean values for enoxaparin dosage were 40.4918 ± 5.43 mg/day. Postoperative DVT or rebleeding prevalence was 0% in both groups. The mean follow‐up duration was 19.139 ± 2.2 months. Long‐term recurrence rate was 2.4% (n = 3). Postoperative pneumocephalus was associated with a higher recurrence rate (P = .031).ConclusionIn terms of VTE chemoprophylaxis, following bur‐hole craniostomy for CSDH, enoxaparin will effectively prevent VTE development without any clinically significant rebleeding.