Department of Anesthesiology and Pain Medicine Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 ChinaDepartment of Anesthesiology Chongqing University Cancer Hospital Chongqing 400030 China;
Department of Anesthesiology and Pain Medicine Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China;
Department of Anesthesiology and Pain Medicine Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China;
Department of Anesthesiology and Pain Medicine Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 ChinaYantai Yuhuangding Hospital Yantai 264000 China;
Department of Anesthesiology and Pain Medicine Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 ChinaDepartment of Anesthesiology Renmin Hospital of Wuhan University Wuhan 430060 China;
Department of Anesthesiology and Pain Medicine Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China;
Department of Anesthesiology and Pain Medicine Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China;
lumbar plexus block; ultrasound guidance; nerve stimulation; ultrasound visibility score;