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Table 2 Parameters and treatments affecting oxygen supply and demand during the first 4 h after ICU admission

From: Association of low mixed venous oxygen saturations during early ICU stay with increased 30-day and 1-year mortality after cardiac surgery: a single-center retrospective study

Parameter

All (N = 6282)

SvO2 ≥ 60% at admission + at 4 h

(N = 4585)

SvO2 ≥ 60% at admission, < 60% at 4 h

(N = 746)

SvO2 < 60% at admission, ≥ 60% at 4 h

(N = 403)

SvO2 < 60% at admission + at 4 h

(N = 528)

P

CI on admission (L/min/m2)

2.36 (2.03–2.77)

2.43 (2.09–2.83)

2.35 (2.0–2.72)

2.09 (1.8–2.39)

2.04 (1.73–2.36)

< 0.001

CI at 4 h (L/min/m2)

2.47 (2.15–2.84)

2.55 (2.23–2.92)

2.28 (2.0–2.59)

2.39 (2.12–2.74)

2.11 (1.87–2.42)

< 0.001

HB on admission (g/L)

105 (96–114)

106 (98–115)

101 (94–110)

101 (91–111)

99 (91–108)

< 0.001

HB at 4 h (g/L)

102 (94–112)

104 (95–114)

98 (90–107)

99 (90–107)

95 (86–102)

< 0.001

Lactate on admission (mmol/L)

1.4 (1.1–1.8)

1.3 (1.1–1.7)

1.4 (1.1–1.8)

1.6 (1.2–2.3)

1.8 (1.4–2.7)

< 0.001

Lactate at 4 h (mmol/L)

1.3 (1.0–1.8)

1.3 (1.0–1.7)

1.5 (1.2–2.0)

1.5 (1.1–2.1)

1.8 (1.4–2.7)

< 0.001

P/F ratio on admission

38 (29–48)

39 (30–49)

36 (28–45)

34 (23–44)

32 (22–43)

< 0.001

P/F ratio at 4 h

40 (30–48)

41 (32–49)

39 (29–48)

37 (27–47)

33 (25–42)

< 0.001

SpO2 on admission (%)

97 (95–99)

97 (95–99)

97 (94–98)

96 (93–98)

96 (92–98)

< 0.001

SpO2 at 4 h (%)

97 (96–99)

98 (96–99)

97 (96–99)

98 (96–99)

98 (96–99)

0.007

PaO2 on admission (kPa)

15.6 (12.7–19.4)

15.9 (12.9–19.7)

15.3 (12.8–19.0)

14.5 (11.1–17.8)

14.2 (11.5–18.9)

< 0.001

PaO2 at 4 h (kPa)

15.2 (12.7–18.2)

15.5 (12.9–18.4)

14.1 (11.4 (17.1)

15.4 (12.8–19.3)

14.5 (11.9–17.7)

< 0.001

Fluids 0–4 h (mL)

1500 (1050–2200)

1450 (950–2000)

1700 (1300–2400)

1650 (1150–2400)

2000 (1400–2750)

< 0.001

Red blood cell transfusions 0–4 h (units)

1 (1–1)

1 (1–1)

1 (1–1)

1 (1–1)

1 (1–1)

0.67

Max VIS category 0–4 h, % (n)

      

0–5

16.7 (528)

18.7 (859)

12.7 (95)

14.6 (59)

5.7 (30)

< 0.001

5–15

29.3 (1838)

30.6 (1402)

26.7 (199)

27.6 (111)

23.9 (126)

< 0.001

15–30

12.8 (804)

12.1 (556)

12.9 (96)

16.4 (66)

16.3 (86)

< 0.001

30–45

2.7 (172)

2.4 (112)

3.1 (23)

3.2 (13)

4.5 (24)

< 0.001

>45

38.4 (2405)

36.1 (1656)

44.6 (333)

38.2 (154)

49.6 (262)

< 0.001

  1. Values are medians (interquartile ranges) unless otherwise specified
  2. CI, cardiac index; HB, hemoglobin; PaO2, arterial oxygen partial pressure; P/F, arterial oxygen partial pressure to fractional inspired oxygen ratio; SpO2, oxygen saturation; VIS, vasoactive index score
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BMC Anesthesiology

ISSN: 1471-2253

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