text: Unilateral<unk>  is usually asymptomatic. Respiratory distress is seen in bilateral<unk> . Causes of<unk>  include unknown in many cases, Phrenic nerve injury in cardiac surgery and some viral infections. Patients after cardiac surgery and viral infection are at higher risk. Chest radiography, fluoroscopic sniff test , measurement of transdiaphragmatic pressure (Pdi) and ultrasound are diagnostic studies for<unk> . Treatment options include ventilatory support and diaphragmatic pacing. Prognosis is excellent in unilateral<unk> , but bilateral<unk>  is a medical emergency.
option_0: Diaphragmatic paralysis
option_1: Tracheal deviation
option_2: Trapped lung
option_3: Vocal cord paresis
option_4: Diaphragmatic rupture
option_5: Urinothorax
option_6: Flail chest
option_7: Diaphragmatic eventration