IRCT20171224038028N1 IRCT 2018-07-07 Mashhad University of Medical Sciences Comparison between the cough peak expiratory flow measurement and the cough strength measurement with white paper test on the success of extubation Comparison between the cough peak expiratory flow measurement and the cough strength measurement with white paper test on the success of extubation in ICU patients. 2018-05-14 anticipated 60 Complete https://irct.ir/trial/30700 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive, Randomization description: Random assignment using random sequence generated by SPSS software is implemented to select patients for intervention and control group. N/A Respiratory failure, unspecified. Intervention 1: The patient which is ready for extubation, is connected to the ventilator with supportive mode. Then he is asked to cough three times. In this case, the peek expiratory flow rate of these coughs is calculated by the Bellavista 1000 ventilator. Intervention 2: Control group: Based on the routine method, for the patient which is ready for extubation, a piece of white paper is kept at a distance of 1-2 cm from the endotracheal tube. The patient is then asked to cough three times. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is not a plan to make this available