Chen CPC, Hsu CC, Cheng CH, et al. - Researchers examined if the distance from the pleura to the inferior trunk of the supraclavicular brachial plexus is associated with body mass index (BMI) and changes in body positioning. For this study, recruitment of 20 stroke patients with upper limb spasticity and complex regional pain syndrome ws done. measurement of distance from the pleura to the inferior trunk was done in the supine position, body turned sideways at 45 °, and in the lateral decubitus position. Findings revealed a significant increase in the distance from the pleura to the inferior trunk by 2-fold in the lateral decubitus body position and its positive correlation with BMI. The safety of the nerve block procedure may improve by the increased distance. As a consequence, they recommended placing patients in the lateral decubitus body position when conducting ultrasound-guided supraclavicular brachial plexus nerve block of the inferior trunk.