Table 4 Arterial Blood Gas Analysis in the ED

Site

ED1

73/222

33 [27–39]

1

1

ED2

119/199

60 [53–67]

3.0 [2.0–4.5]

2.5 [1.6–3.9]

ED3

65/99

66 [56–75]

3.9 [2.4–6.4]

3.7 [2.1–6.7]

ED4

20/98

20 [12–28]

0.5 [0.3–0.9]

0.6 [0.3–1.2]

ED LOS (h)

–

–

1.0 [0.9–1.0]

1.0 [0.9–1.0]

Ventilation type

Invasive

215/484

44 [40–49]

1

1

Non-invasive

54/118

46 [37–55]

1.1 [0.7–1.6]

1.6 [0.8–3.3]

Both

8/16

50 [26–75]

1.3 [0.5–3.4]

5.3 [1.5–19.2]

Reason for ventilation

Respiratory/cardiac

70/182

39 [31–46]

1

1

Trauma

65/168

39 [31–46]

1.0 [0.7–1.6]

0.9 [0.6–1.6]

Neurological

66/124

53 [45–62]

1.8 [1.1–2.9]

1.9 [1.1–3.3]

Cardiac arrest

32/62

20 [14–26]

1.7 [1.0–3.1]

1.9 [1.0–3.9]

Other

12/21

57 [36–78]

2.1 [0.9–5.3]

2.4 [0.9–6.5]