| Recruiting | N/A | 5000 | RoW | conventional surgery, endovenous laser ablation, sclerotherapy, endovenous radiofrequency ablation, phlebectomy | Medalp Private Surgery Clinic, Pirogov Russian National Research Medical University | Varicose Veins of Lower Limb | 07/36 | 07/36 | | |
| Recruiting | N/A | 100 | RoW | | Russian Phlebological Association | Varicose Veins of Lower Limb, Thromboses, Venous, Venous Insufficiency | 09/30 | 09/30 | | |