6Happ MB, Tuite P, Dobbin K, et al. Communication ability, meth- od,and content among nonspeaking nonsurviving patients treated with mechanical ventilation in the intensive care unit[J]. American Journal of Critical Care, 2004,13(3) : 210 - 218.
7Xiaoling D, Lili Z. Design and application of a body - language machine in mechanically ventilated patients[J]. Journal of Nurs- ing Science, 2010,3 : 002.
