Fig. 2From: Hypercapnic respiratory distress and loss of consciousness: a complication of supraclavicular brachial plexus blockM-mode ultrasound images during respiratory cycles. The right image (a) demonstrated loss of respiratory movement of the right hemidiaphragm, while in the left image (b), normal respiratory movement of the left hemidiaphragm was detected (arrows inspiratory phase). A small pleural effusion (aechoic space) was seen posterior to the diaphragm (asterisk)Back to article page