Using Thoracic Paravertebral Block for Perioperative Lung Preservation During VATS Pulmonary Surgery

Patients randomly assigned to PV group will be placed in lateral position, and punctured using the out of plane technique guided by ultrasound (Shenzhen Huasheng Navi low-frequency convex array probe). 15 ml of 0.5% ropivacaine was administered to the T4 and T7 thoracic paravertebral spaces respectively, for a total of 30 ml. After injection, the pleura of the punctured segment and adjacent segments could be obviously moved down. Upon successful puncture, the patient was transferred to the supine position. After 5, 10, and 15 minutes, the range of sensory blockage was tested at T3\~T8 to cover the surgical area.