This prospective observational study aims to compare the effects of spinal anesthesia and supra-inguinal fascia iliac block (SIFIB) on the quality of postoperative recovery in endovenous radiofrequency ablation (RFA) of varicose veins. The primary outcome measure of the study is the QoR-40 quality of recovery score. Secondary outcome measures include postoperative pain scores (VAS/NRS), motor block level (Bromage Scale), perfusion index (PI), time to first mobilization, and patient and surgeon satisfaction.

Inclusion Criteria:

• Age Profile: Adults aged between 18 and 65 years.
• Physical Status: Patients classified as American Society of Anesthesiologists (ASA) Physical Status I, II, or III.
• Informed Consent: Patients who voluntarily agreed to participate and provided written informed consent.
• Cognitive Status: Patients who were conscious, oriented, and capable of cooperating with the pain assessment scales (NRS) and the QoR-40 questionnaire.

Exclusion Criteria:

• Venous Pathology: Presence of deep venous insufficiency (e.g., iliac or femoral vein obstruction, iliac vein stenosis) or acute deep vein thrombosis (DVT) in the lower extremity.
• Systemic Diseases: Combined cardiac, pulmonary, hepatic, or renal dysfunction.
• Hematological Disorders: Coagulation disorders or active bleeding diathesis.
• Neurological/Cognitive Status: Presence of dementia, cognitive impairment, or inability to cooperate during the procedure.
• Local Contraindications: Active infection at the site of the regional anesthesia intervention or surgical field.
• Patient Refusal: Patients who declined regional anesthesia or had a known allergy to local anesthetics.

Patients undergoing varicose vein surgery at Zonguldak Bülent Ecevit University Hospital