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Influence of the speed of expiration on the magnitude of the total resistance (Rt) assessed by means of a whole-body plethysmograph.

H Felkel, Marcel Jiřina, Milos Adamec, Rudolf Feuereisl

Abstract

The authors demonstrate by comparing results of the mathematical model FMAR 8G and curves recorded during examination by means of a whole-body plethysmograph the influence of the expiration speed on value Rt in patients with an altered elasticity in the alveolar area and with an enhanced collapsibility of the respiratory pathways.

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Key concepts: Plethysmograph, Expiration, Respiratory system, Elasticity (physics), Medicine, Airway resistance, Pulmonary gas pressures, Mathematics