Postoperative Venous Thromboembolism in Patients Undergoing Endovenous Laser and Radiofrequency Ablation of the Saphenous Vein.

Objective: Endovenous laser ablation (EVLA) and radiofrequency ablation (RFA) are safe and effective treatments for varicose veins caused by saphenous reflux. Deep venous thrombosis (DVT) and endovenous heat-induced thrombosis (EHIT) are known complications of these procedures. The purpose of this article is to investigate the incidence of postoperative DVT and EHIT in patients undergoing EVLA and RFA. Methods: The patients were assessed by clinical examination and venous duplex ultrasonography before operation and at 24-72 hours, 1 month, and 1 year follow-up after operation. Endovenous ablation (EVA) had been treated for 1026 limbs (835 patients) using an RFA; 1174 limbs (954 patients) using a 1470-nm wavelength diode laser with radial two-ring fiber (1470R); and 6118 limbs (5513 patients) using a 980-nm wavelength diode laser with bare-tip fiber (980B). Results: DVT was detected in 3 legs (0.3%) of RFA, 5 legs (0.4%) of 1470R, and 27 legs (0.4%) of 980B. One patient in three symptomatic DVT treated with 980B developed asymptomatic pulmonary embolus. In all, 31 of the 35 DVTs were confined to the calf veins. The incidence of EHIT classes 2 and 3 was 2.7% following RFA procedure, 6.7% after 1470R, and 7.5% after 980B. Conclusion: The incidence of EHIT following EVA was low, especially the RFA procedure. EHIT resolves within 2-4 weeks in most patients. DVT rates after EVA were compared with those published for saphenous vein stripping. (This is a translation of J Jpn Coll Angiol 2015; 55: 153-161.).