Causes of coughing up blood range from mild to serious. Bronchitis is the most common, and least serious, cause of coughing up blood. Other causes may include: Blood clot in the lung. Pulmonary aspiration (breathing blood into the lungs). Lung cancer. Excessive, violent coughing that irritates your throat. Pneumonia.
Hemoptysis vs Hematemesis. Do not confuse hemoptysis with hematemesis because they are different. While hematemesis is vomiting of blood which normally comes from the upper gastrointestinal tract, hemoptysis is the coughing of blood. Hemoptysis normally affects the throat while hematemesis affects mainly stomach causing an upset.
Abstract. Hemoptysis is one of the most important symptoms of cardiopulmonary disease—first, because bleeding even in small amounts may indicate the presence of such serious diseases as bronchogenic carcinoma or active tuberculosis, and second, because untreated massive hemorrhage is associated with a high mortality rate.
Pathophysiology of Hemoptysis. Most of the lung’s blood (95%) circulates through low-pressure pulmonary arteries and ends up in the pulmonary capillary bed, where gas is exchanged. About 5% of the blood supply circulates through high-pressure bronchial arteries, which originate at the aorta and supply major airways and supporting structures.
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