Effects of time delay and body temperature on measurements of central venous oxygen saturation, venous-arterial blood carbon dioxide partial pressures difference, venous-arterial blood carbon dioxide partial pressures difference/arterial-venous oxygen difference ratio and lactate

Table 4 Comparisons of values between two groups

Groups	10 min	20 min	30 min	40 min	50 min	60 min
△ScvO₂
Control group (n = 19)	2.8 ± 1.5	4.9 ± 1.6	7.2 ± 2.7	9.1 ± 3.2	11.4 ± 3.5	14.0 ± 4.4
High temperature group (n = 11)	1.4 ± 0.9	3.2 ± 1.7	4.9 ± 1.8	6.1 ± 2.5	7.5 ± 3.4	8.9 ± 4.3
P value	0.013	0.014	0.016	0.011	0.006	0.005
△Pv-aCO₂
Control group (n = 19)	0.1 ± 0.6	0.1 ± 1.0	0.3 ± 1.0	0.7 ± 0.8	0.7 ± 0.9	0.8 ± 1.1
High temperature group (n = 11)	−0.2 ± 0.4	−0.2 ± 0.9	0.2 ± 0.8	0.1 ± 1.0	0.4 ± 1.2	0.4 ± 1.4
P value	0.138	0.469	0.668	0.054	0.437	0.313
△Pv-aCO₂/ Ca-vO₂
Control group (n = 19)	0.23 ± 0.17	0.46 ± 0.49	1.1 ± 1.7	1.51 ± 1.94	1.89 ± 2.13	2.79 ± 3.85
High temperature group (n = 11)	0.04 ± 0.16	0.25 ± 0.39	0.59 ± 0.63	0.77 ± 1.04	1.10 ± 1.30	1.41 ± 1.46
P value	0.005	0.252	0.374	0.253	0.279	0.264
△Lactate
Control group (n = 19)	0.13 ± 0.08	0.23 ± 0.10	0.33 ± 0.12	0.43 ± 0.18	0.51 ± 0.19	0.62 ± 0.22
High temperature group (n = 11)	0.16 ± 0.08	0.35 ± 0.14	0.51 ± 0.31	0.72 ± 0.44	0.89 ± 0.62	1.14 ± 0.80
P value	0.309	0.012	0.030	0.015	0.016	0.012

ISSN: 1471-2253