Early Prediction of Respiratory and Autonomic Complications of GBS Using Neuromuscular Ultrasound

Inclusion Criteria: * Patients that will fulfill the published diagnostic criteria of GBS. * Age: 18-65 * Both sexes Exclusion Criteria: * History of cardiopulmonary dysfunction * BMI\>30 Kg/m2 * Renal or hepatic failure * Sepsis * Autonomic or respiratory dysfunction from the start * Patients with hypo- or hyperkalemic paralysis, porphyria, viral myositis, botulism, diphtheritic neuropathy, and history of potential toxic exposure were excluded. * Abnormal pulmonary function test from the start.