1[1]Esteban AF, Frutos MJ,Tobin, et al. A comparison of four methods of weaing patients from mechanical ventila. N Engl J Med, 1995,322: 345.
2[2]Ely EW,Barker AM,Dunagan DP,et al. Effect of the duration of mechanical ventilation of identifying patients capable of breathing spontaneously. N Engl J Med, 1996,335: 1864.
3[3]Tobin MJ, Alex CG, Principles and practice of mechanical ventilation: McGraw Hill, New York: 1994, 1177.
4[4]Linton DM, Potgieter PD, Davis S, et al. Automatic weaning from mechanical ventilation using an adaptive lung vntilation controller.Chest, 1994,106: 1843.