Answer
Though controversial, administration of magnesium is thought to produce bronchodilation through the counteraction of calcium-mediated smooth muscle constriction. The addition of intravenous magnesium is now considered to have class B evidence supporting its use in difficult and life-threatening exacerbations.
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Media Gallery
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Chronic obstructive pulmonary disease (COPD). Histopathology of chronic bronchitis showing hyperplasia of mucous glands and infiltration of the airway wall with inflammatory cells.
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Chronic obstructive pulmonary disease (COPD). Histopathology of chronic bronchitis showing hyperplasia of mucous glands and infiltration of the airway wall with inflammatory cells (high-powered view).
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Posteroanterior (PA) and lateral chest radiograph in a patient with severe chronic obstructive pulmonary disease (COPD). Hyperinflation, depressed diaphragms, increased retrosternal space, and hypovascularity of lung parenchyma is demonstrated.
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Chronic obstructive pulmonary disease (COPD). A lung with emphysema shows increased anteroposterior (AP) diameter, increased retrosternal airspace, and flattened diaphragms on lateral chest radiograph.
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Chronic obstructive pulmonary disease (COPD). A lung with emphysema shows increased anteroposterior (AP) diameter, increased retrosternal airspace, and flattened diaphragms on posteroanterior chest radiograph.
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Subcutaneous emphysema and pneumothorax.
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