Cause of hemoptysis, massive hemoptysis is caused by what the cause

hemoptysis is what causes it?

(a) causes

lung has two sets of blood vessels, namely the pulmonary circulation and bronchial circulation, the right ventricle from the pulmonary artery and its branches for the cone of low pressure systems, providing about 95% of pulmonary blood supply, from the bottom of the bronchial artery in the aorta, the pressure system, generally to about 5% of the lung blood, the main airway and support structure to the blood supply, according to statistics, in which 90% of patients with massive hemoptysis from the bronchial circulation of the blood, and bleeding from the pulmonary circulation accounted for only about 10%.

known diseases that can cause hemoptysis, nearly 100 species according to their anatomical differences, can be divided into four categories, namely: ① the trachea, bronchial disorders; ② lung disease; ③ cardiovascular disease; ④ systemic disease.

surgical series according to a recent comprehensive study, in the common cause, the cause of the common causes of massive hemoptysis were: ① bronchiectasis (about 30%); ② lung cancer (about 20%); ③ tuberculosis (about accounted for 15% to 20%), Table 1.

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(B) the pathogenesis

hemoptysis due to bronchial inflammation and bronchial and surrounding tissue caused by obstruction of the bronchial wall damage and luminal expansion, deformation, often accompanied by telangiectasia and pulmonary or bronchial artery branch network expansion and other late match, the formation of arterial aneurysm rupture, it can be repeated massive hemoptysis.