Fig. 3From: The effectiveness of additional thoracic paravertebral block in improving the anesthetic effects of regional anesthesia for proximal humeral fracture surgery in elderly patients: study protocol for a randomized controlled trialUltrasound image of the thoracic paravertebral block (TPVB). TPS thoracic paravertebral space, TP transverse process, SP spinous process, P pleura, L lung, IM intercostal muscle, RM rhomboid muscle, ESM erector spinae muscles, T trapeziusBack to article page