The peripheral perfusion index and transcutaneous oxygen challenge test are predictive of mortality in septic patients after resuscitation

Table 3 Peripheral perfusion related-variables in the different groups

Variables	Controls n = 20	All sepsis n= 46	Survivor sepsis n= 26	Nonsurvivor sepsis n= 20
PI	2.58 ± 0.68^a,c	1.37 ± 1.43	1.95 ± 1.5^c	0.6 ± 0.86
PtcO₂	124 ± 45^a,b,c	73 ± 24	79 ± 21	66 ± 26
PaO₂ (on basic FiO₂)	179 ± 70^a,b,c	119 ± 45	125 ± 51	111 ± 37
PtcO₂ index	0.71 ± 0.29	0.67 ± 0.22	0.69 ± 0.21	0.64 ± 0.24
PtcCO₂	36 ± 7	36 ± 9	38 ± 7	34 ± 12
PaCO₂	35 ± 6	36 ± 8	37 ± 6	35 ± 10
10min-OCT	247 ± 65^a,b,c	145 ± 99	186 ± 75^c	93 ± 103
PaO₂ (on 1.0 FiO₂)	489 ± 106^a,b,c	343 ± 122	371 ± 116	307 ± 123
OCI	0.83 ± 0.2^c	0.66 ± 0.35	0.79 ± 0.28^c	0.49 ± 0.36

^aP <0.05 for controls vs. all sepsis; ^bP <0.05 for controls vs. survivor sepsis; ^cP <0.05 for controls vs. nonsurvivor sepsis. PI, peripheral perfusion index measured by pulse oximetry; FiO₂, fraction of inspired oxygen concentration; PtcO₂, transcutaneous partial pressure of oxygen (mmHg); PaO₂, arterial pressure of oxygen (mmHg); PtcCO₂, transcutaneous partial pressure of carbon dioxide (mmHg); PaCO₂, arterial pressure of carbon dioxide (mmHg); 10min-OCT, 10 minute oxygen challenge test value (mmHg); OCI, oxygen challenge index.

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