Fig. 1

Patient position and standard US anatomical landmarks. The images belong to a 51-year-old male undergoing left lower lobectomy by u-VATS. A 4th, 5th, and 6th thoracic intercostal spaces are marked. B At those intercostal spaces, an US high-frequency probe is longitudinally placed 7–10 cm parallel to the spine. C Sonoanatomy of intercostal space is easily recognized. D Color Doppler identifies intercostal vessels and nerve. The dotted green arrow depicted the right direction and tip position of the 14G angiocath used during the procedure