Thai female 75year old , Semicoma GCS E1 VTM4 motor power Right arm grade 2 left arm grade 1 right leg grade 2 and left leg grade 1, on ET-tube No.7.5 mark 22 cm Setting ventilator mode PC-AC Pinsp 14 cmH2O,Ti 0.9 sec , PEEP 5 cmH2O, RR 16 bpm , Fi O2 40%. Inhalation associated with ventilator, retained NG- tube for feed, on NSS lock on the right foot and left knee, on foley catheter,