7Denehy L. The use of manual hyperinflation in airway clearance. Euro Respir J, 1999, 14:958-965.
8Rothen H, Sporre B, Engberg G, et al. Re - expansion of atelectasis during general anaesthesia: a computed tomography study. Br J Anaesthesia, 1993, 71 : 788 - 795.
9Tweed W, Phua W, Chong E, et al. Tidal volume ,lung hyperinflation and arterial oxygenation during general anaesthesia. Anaesthesia Intensive Care , 1993, 21:806 - 810.
10Hodgson C, Denehy L, Ntoumenopoulos G, et al. The acute effects of manual hyperinflation in critically ill patients. Eur Bespir J ,1996, 23: 37.