Paradoxical hemidiaphragm motion due to a massive effusion - Lung POCUS The fatigued, inverted hemidiaphragm cannot contract during inspiration and gets sucked up by the negative intrathoracic pressure generated during an inspiratory effort. Dr. Udit Chaddha @udit_chaddha #Paradoxical #hemidiaphragm #motion #diaphragm #lung #pocus #clinical #ultrasound