Frequency of spontaneous breathing 1 hour (panel A) and 2 hours (panel B) after disconnection from ALV in Group 1 and Group 2. A significant difference was found in the respiratory frequency of spontaneous breathing between groups 1 and 2 (p < 0.05). The frequency of spontaneous breathing was higher in Group 2 in which Cst was lower before disconnecting from a ventilator. The adaptation of patients to spontaneous inspiration within 120 minutes after extubation was faster in Group 1 than in Group 2. A prerequisite for improved adaptation is probably lower ventilation work.

Table 3: Frequency of spontaneous breathing 1 hour (panel A) and 2 hours (panel B) after disconnection from ALV in Group 1 and Group 2. A significant difference was found in the respiratory frequency of spontaneous breathing between groups 1 and 2 (p < 0.05). The frequency of spontaneous breathing was higher in Group 2 in which Cst was lower before disconnecting from a ventilator. The adaptation of patients to spontaneous inspiration within 120 minutes after extubation was faster in Group 1 than in Group 2. A prerequisite for improved adaptation is probably lower ventilation work.

	A	B
	The frequency of spontaneous breathing (breath^*min^-1) 1 hour after disconnection from ALV	The frequency of spontaneous breathing (breath^*min^-1) 2 hours after disconnection from ALV	t- test
Group 1	19 ± 5	18 ± 4	^*
Group 2	24 ± 4	22 ± 4	^*
^*- Student's paired t-test, p < 0.05