... severity (whereReviewClinical review: Severe asthma Spyros Papiris, Anastasia Kotanidou, Katerina Malagari and Charis RoussosDepartment of Critical Care and Pulmonary Services, National and Kapodistrian ... hypovolemia, and primar-ily lung hyperinflation. Dynamic hyperinflation, as previouslydiscussed, occurs when the highly increased airway expira-tory resistance prolongs expiratory flow in such a way ... hyperinflation in acute, severe asthma, is primarilyrelated to the fact that the highly increased airway expiratoryresistance, the high ventilatory demands, the short expiratorytime, and the increased...