![]() The change in pressure between two points ![]() What is the difference between atmospheric pressure and barometric pressure? ![]() What is the normal range for barometric pressure?ħ. The force exerted by the air that surrounds the bodyĦ. The process of taking air into the lungs and expelling it into the atmosphere The exchange of gases providing the blood and tissues with oxygen and removing excess carbon dioxide The gas exchange between pulmonary capillaries and the alveoli Although mortality can exceed 50%, survivors have a good prognosis for recovery of lung function.The gas exchange between systemic capillaries and cells Clinical vigilance must be comprehensive and anticipatory to guard against development of ventilator-associated pneumonia or worsened ALI. Positive end-expiratory pressure ( PEEP) ventilation is useful for alveolar recruitment in lungs that will be prone to atelectasis. Despite numerous prospective, double-blind clinical trials in patients with ALI/ARDS, the only treatment that improves survival is mechanical ventilation using a lung protective strategy in which tidal volume V T is carefully titrated to ~6 mL/kg of predicted body weight. Respiratory failure may be initiated by pulmonary or extrapulmonary insults that increase alveolar epithelial and endothelial permeability, flood alveoli, and reduce lung compliance in a pattern reflecting an acute restrictive lung disease. ALI/ARDS can affect patients of any age or preexisting condition, although both predispose to worse outcomes. Acute lung injury ( ALI) and the acute respiratory distress syndrome ( ARDS) represent a spectrum of respiratory failure of rapid onset characterized by diffuse, bilateral lung injury and severe hypoxemia that are caused by noncardiogenic pulmonary edema.
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