Open and Closed Endotracheal Suctioning and Arterial Blood Gas Values: A Single-Blind Crossover Randomized Clinical Trial

Table 2

ABG indices in the OS and CS techniques at four measurement times.

ABG indices	Technique	Time
		Before suction (T0)	1 min after suction (T1)	5 min after suction (T2)	15 min after suction (T3)	value
PaO2	Open	103.91 ± 8.27	114.44 ± 9.47	98.45 ± 7.94	100.10 ± 7.46	<0.001
	Closed	104.49 ± 7.38	107.50 ± 7.56	103.97 ± 7.53	104.27 ± 7.66	<0.001
	value	0.67	<0.001	<0.001	0.002	—
PaCO2	Open	38.21 ± 3.44	39.54 ± 3.80	40.55 ± 4.02	39.13 ± 4.13	<0.001
	Closed	38.46 ± 3.19	36.95 ± 3.09	36.81 ± 3.18	36.81 ± 3.18	<0.001
	value	0.61	<0.001	<0.001	<0.001	—
SaO2	Open	96.25 ± 1.88	97.22 ± 1.88	94.17 ± 3.09	94.77 ± 2.74	<0.001
	Closed	96.13 ± 2.11	96.44 ± 2.04	95.89 ± 2.21	96.04 ± 2.01	<0.001
	value	0.60	<0.001	<0.001	<0.001	—

The results of the Wilcoxon test.
The results of Freidman’s rank test.