5Overend T J ,Anderson C M ,Lucy S D,et al. The effect of incentive spirometry on postoperative pul- monary complications: a systematic review [J]. Chest, 2001,120(3) : 971-978.
6Kocabas A,Kara K ,Ozgur G,et al. Value of preoperative spirometry to predict postoperative pulmonary complications [J]. Respir Med, 1996,90 (1) : 25-33.