2Agarwal R, Aggarwal AN, Gupta D, et al. Role of noninvasive positive-pressure ventilation in postextu- bation respiratory failure: ameta-analysis. Respir Care, 2007,52(11) : 1472-1479.
4Sapi jaszko MJA, Brant R, Sandham D, et al. Nonrespiratory predictor of mechanical ventilation dependency in intensive care unit patients. Crit Care Med, 1996,24:601.
5Jounieaux V, DuranA, Levi-ValensiP. Synchronized interm-ittent mandatory ventilation with and without pressure support ventilation in with COPD from mechanical ventilation. Chest, 1994,105 : 1204 -1210.
