6POWELL JF, MENON DK, JONES JG. The effects nf hypoxaemia and recommendations for postoperative oxygen therapy [J].Anaesthesia, 1996, 51(8): 769-772.
7SQUADRONE V, COHA M, CERUTTI E, et al. Continuous positive airway pressure for treatment of postoperative hypoxemia: a randomized controlled trial[J]. JAMA, 2005, 293: 589-595.
8DELEY WD, NORMAN PH, COLMENARES ME, et al. Hypoxaemia in adults in the post-anestheisa care unit [J]. Can J Anaesth, 1991, 38(6): 740-746.
9HEDENSTIERNA G. Alveolar collapse and closure of airways:regular effects of anaesthesia [J]. Clin Physiol Funct Imaging,2003, 23: 123-129.
10STRACHAN L, NOBLE DW. Hypoxia and surgical patients-prevention and treatment of an unnecessary cause nf morbidity and mortality[J]. J R Coil Surg Edinb, 2001, 46:297-302.