患者男,24岁,因呼吸困难,经常需吸氧治疗,而被送至肺功能试验室检查。患者23岁时进某化工厂工作,在该厂工作三年,后因听到该厂空气有危险品污染,才离开该厂。离厂后做零工。在离厂六个月后出现劳动时气短的症状,就医作体格检查及胸部X线透视。结果未发现可以解释其气短的征象。既往曾发生过一次严重呼吸困难,送入当地医院急诊室救治,给氧后呼吸困难症状很快消失。后来,疾病渐逐加重,经常需要吸氧治疗。患者自述过去曾有癫癎发作。用氧气进行换气功能试验,结果:肺量活3.66升,相当正常值的 Male patient, 24 years old, often needs oxygen therapy due to dyspnea and is sent to pulmonary function test room. At the age of 23, the patient entered a chemical factory and worked in the factory for three years before leaving the factory because of the air pollution of dangerous goods in the factory. After leaving the factory to do odd jobs. Six months after departure from the factory when the symptoms of shortness of breath, medical examination for physical examination and chest X-ray. The results did not find signs of shortness of breath can be explained. In the past there had been a severe dyspnea and was sent to the emergency room of a local hospital for treatment. The symptoms of dyspnoea disappeared soon after oxygen administration. Later, the disease gradually increased gradually, often need oxygen therapy. The patient reported having had an epileptic seizure in the past. Ventilation with oxygen test function, the results: 3.66 liters of live lung volume, quite normal