超声引导下大腿中部入路收肌管隐神经阻滞对大隐静脉曲张手术患者术后疼痛和早期活动的影响

Effect of ultrasound-guided saphenous nerve block at the adductor canal via middle thigh approach on postoperative pain and early activity of patients undergoing operation for great saphenous varicose veins