Ventilation-perfusion abnormalities can be quantified. Pulmonary diseases that alter the ventilation-perfusion ratio, and demonstrates how It explains the functional consequences of Ventilation-perfusion ratios among lung regions. In particular, it explains the reasons for different This chapter focuses on the relationship between alveolar ventilation and blood Last two sections deal with the work of breathing and the most common pulmonary Of lung elasticity (emphysema), or suffering from extra-thoracic airway obstruction. Pressures changes during normal breathing and while breathing through narrowedĪirways are described, as well as mechanism causing airway collapse in patients with loss Gases flow through airways during the breathing cycle. Maintaining the alveoli dry is discussed in detail. The relevance of surface tension and surfactant in modulating lung compliance and in The combined lungs + chest wall system, and with methods used for quantifying them. Static mechanics deals with elastic characteristics of lungs, chest wall and The properties of respiratory mechanics are then divided into two sections: staticĪnd dynamic. The relationship between respiratory muscles and elastic characteristics of the respiratory Then, it describes the mechanisms of inspiration and expiration and It begins by defining the lung volumes (capacities) and describing methods usedįor measuring them. The mechanisms by which gases are flown in and out of the lungs during the breathingĬycle. This chapter focuses on the elastic properties of the respiratory system and on
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