观察了口服皮质类固醇能否预防艾滋病并发的卡氏肺孢子虫肺炎患者早期恶化。方法:采取前瞻性、双盲、安慰剂对照和随机设计。所选病人首次发生卡氏肺孢子虫肺炎,48h内未作特定治疗,无其它活动性肺部病变,对皮质类固醇无禁忌症,静止时血氧饱和度达85％或90％左右,或运动时血氧饱和度减少5个百分点。将符合上述条件的志愿 Oral corticosteroids were observed for the prevention of AIDS complicated with Pneumocystis carinii pneumonia in patients with early deterioration. Methods: A prospective, double-blind, placebo-controlled and randomized design was adopted. Pneumocystis carinii pneumonia developed in the selected patient for the first time, no specific treatment was given within 48 hours, no other active pulmonary lesions, no contraindications to corticosteroids, or 85% or 90% oxygen saturation at rest, or exercise When oxygen saturation decreased by 5 percentage points. Will meet the above conditions of volunteer