. 1999 Jun 25;3(3):85–89. doi: 10.1186/cc345

Table 3.

Arterial respiratory gas modifications at the five times of the study

				Times

Function	Group	1	2	3	4	5
PaO₂	A1	69.6 ± 5	111.9 ± 28	147.2 ± 41*	157 ± 42^†	116 ± 25*
(mmHg)	A2	78.6 ± 8		78.1 ± 8	82.7 ± 9	78.7 ± 14
	B1	68.8 ± 8	97.8 ± 17	146.5 ± 33*	156.6 ± 40^†	102.5 ± 13*
	B2	87.9 ± 19		82 ± 12	88.2 ± 10	86.7 ± 10
	C	81.3 ± 11^‡	144.8 ± 27^‡	208.7 ± 35^*‡	233.7 ± 37^*†‡	152.2 ± 31^*‡
SaO₂	A1	94.2 ± 1.4	97.7 ± 1.3	98.6 ± 0.9*	98.9 ± 0.5^†	98 ± 1*
(%)	A2	95.4 ± 1.3		95.3 ± 1.3	96 ± 1.2	95 ± 2.2
	B1	93.7 ± 2.1	97.1 ± 1.5	98.7 ± 0.5*	98.8 ± 0.5^†	97.4 ± 1*
	B2	96.2 ± 3.3		96 ± 1.6	96.8 ± 1.1	96.7 ± 1.1
	C	96.4 ± 1.3^‡	98.9 ± 0.3^‡	99.4 ± 0.2^*‡	99.6 ± 0.1^*†‡	99 ± 0.4^*‡
PaCO₂	A1	39.2 ± 4	40.1 ± 4	40.3 ± 4	41.2 ± 4	40 ± 5
(mmHg)	A2	40.9 ± 3		41.3 ± 4	41.1 ± 5	41.1 ± 5
	B1	39 ± 4	40.1 ± 5	41.6 ± 5	43.6 ± 6	43.8 ± 7
	B2	38.9 ± 4		40.8 ± 4	40.6 ± 5	38.5 ± 3
	C	35.9 ± 4	36.3 ± 6	37.5 ± 5	36.3 ± 4	35.6 ± 5

*P<0.05, versus the previous time within each group; ^†P <0.05, versus time 2 within each group; ^‡P <0.05, versus groups A1 and B1 in the correspondent time. PaO₂, arterial oxygen tension; SaO₂, arterial oxygen saturation; PaCO₂, arterial carbon dioxide tension. For a definition of the groups and times, please see text.