Retrospective chart review of venous thromboembolism incidence and management in rural patients undergoing varicose vein treatment

Purpose: Determine the rate of incidence, risk factors, and management for developing venous thromboembolism (VTE) in patients undergoing radiofrequency ablation (RFA) and ultrasound-guided foam sclerotherapy (UGFS) for varicose veins.

Methods: All charts of patients undergoing venous ablation from 2016 to 2023 were reviewed at a rural vein treatment clinic. The incidence of VTE was noted and a chart review was completed to identify risk factors for VTE, EHIT score, EFIT score, and management.

Results: Patients underwent 14,172 UGFS procedures and 4865 RFAs. VTE was noted in 45 patients (0.24%), with no pulmonary embolisms and no fatal outcomes among the patient population. Patients diagnosed with VTE had a median CEAP score of 3 and a modified Caprini risk score of 7.2. Increased risk of VTE was noted in patients with prior history of DVT, patients undergoing UGFS, patients with higher Caprini scores. 90% of patients diagnosed with VTE had a prior history of DVT (p < 0.05). Patients who received UGFS treatments had a higher modified Caprini Risk Score than patients who received an RFA and UGFS, 8.7 and 6.8 respectively (p < 0.05). Increased risk of VTE was noted in patients with swollen legs prior to treatment (0.92%), visible varicose veins (0.92%), obesity (0.49%), and surgery within the prior 3 months to vein treatment (0.41%).

Conclusion: The modified Caprini score is a useful tool for risk stratification for VTE and its incidence is low for patients undergoing RFA and UGFS. Prior history of VTE represents a significant risk for recurrence in patients undergoing RFA and UGFS.