1. Department of Cardiovascular Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
2. Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
3. Department of Anesthesiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
4. Department of Shock and Transfusion, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing 400042, China