Differential lung ventilation assessed by electrical impedance tomography in ultrasound-guided anterior suprascapular nerve block vs. interscalene brachial plexus block

BACKGROUND Ultrasound-guided interscalene brachial plexus block (ISB) is used to control pain after shoulder surgery . Though effective, drawbacks include phrenic nerve block and motor block of the hand. The ultrasound-guided anterior approach to perform suprascapular nerve block (SSNB) may provide a good alternative. OBJECTIVE To compare lung ventilation and diaphragmatic activity on the operated side in ISB and SSNB. DESIGN Randomised,...