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调查16,388例胸部受检患者中,其发病率约为4%。常见原因包括支气管癌、肺炎,或伴有梗塞的肺栓塞和心力衰竭。有时积液的发生并无肺部受累的迹象。结核是引起胸腔积液的重要原因,而且约在30年前,青年人“不能解释“的积液几乎总是由结核引起。对144名只有胸腔积液的军人调查,有3/4的患者年龄是在25岁以下,而25岁以上的人员中有半数在开始发生积液的5年中患了活动性肺结核。其他不易诊断的胸腔积液是由于病毒感染和结缔组织病引起。由病毒引起的感染,发病急骤、伴有发热。由结缔组织病发生胸膜炎和出现胸腔积液(有时是大量积液)是系统性红斑狼疮的一个公认的特征。Walker等研
Of the 16,388 chest exams examined, the incidence was approximately 4%. Common causes include bronchial carcinoma, pneumonia, or pulmonary embolism with heart failure and heart failure. Occasionally there is no evidence of lung involvement. Tuberculosis is an important cause of pleural effusion, and about 30 years ago, young people “can not explain” the fluid is almost always caused by tuberculosis. Of the 144 men who had pleural effusion alone, three out of four patients were under 25 years of age, and over half of those over the age of 25 had active tuberculosis 5 years after starting the effusion. Other difficult to diagnose pleural effusion is due to viral infection and connective tissue disease. Infections caused by the virus, the incidence of sudden, accompanied by fever. Pleuritis and the presence of pleural effusion (and sometimes pleural effusion) from connective tissue disease are a well-recognized feature of systemic lupus erythematosus. Walker and other research