Relationship between postoperative venous thromboembolism and hemorrhage in patients undergoing total thyroidectomy without preoperative prophylaxis

Introduction: The aim of the present study was to critically review the incidence of venous thromboembolism and postoperative hemorrhage in patients undergoing total thyroidectomy without preoperative prophylaxis. Methods: A prospective electronic database of all patients undergoing total thyroidectomy over a six -year period within August 2013 in our medical unit was analyzed. The incidence of postoperative bleeding and Venous thromboembolism (VTE) was reviewed by subgrouping all patients according to a risk factor score (RFS) for VTE as outlined in the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) Best Practice Guidelines. Results: An overall 1018 consecutive patients [244 men (24%, mean age 46 ± 13 years), 778 women (76%, mean age 44 ± 17 years)] underwent total thyroidectomy. Postoperative bleeding occurred in 8/1018 patients (0.8%). One out of 1018 (0.1%) patients also subcategorized according to the RFS had VTE. The incidence of VTE complication in the entire population was lower than the risk of postoperative bleeding (P < .0001). Conclusion: The risk of developing VTE in patients who undergo total thyroidectomy for benign and malignant diseases without preoperative prophylaxis is roughly 8-fold less than developing a potentially life threatening complication as postoperative bleeding. Until large well conducted prospective studies on the impact of preoperative prophylaxis on postoperative VTE and bleeding will clarify the issue, it is conceivable to propose the use of stockings and/or anticoagulants according to the individual patient risk factors.