目前 ,对于恶性胸水的治疗 ,临床上多采用胸腔内引流并给药的方法 ,对于该方法的疗效 ,各家报道不一[1,2 ] ,治疗无效的患者并不少见 ,无效的原因尚无明确解释 ,我们对 2 7例胸水治疗前的 ｐＨ值进行检测 ,再给予胸腔化疗 ,发现胸水 ｐＨ值对恶性胸水的治疗疗效有一定影响 ,现 At present, for the treatment of malignant pleural effusion, methods of intrathoracic drainage and administration are commonly used. There are various reports on the efficacy of this method [1,2]. Patients with ineffective treatment are not uncommon. Without clear explanation, we tested the pH value of 27 cases before pleural effusion treatment, and then given thoracic cavity chemotherapy, and found that the pH value of pleural effusion has a certain influence on the curative effect of malignant pleural effusion.