Emergency Medicine

Paediatric Emergencies 337

Age

Weight (kg)

Height (cm)

Heart rate (beats/min)

Systolic BP (mmHg)

Circulating blood volume (mL)

Respiratory (breaths/min) rate

Male

Female

Male

Female

0–1 year

3.5–10.3

3.4–9.6

50–75

50–74

110–160

70–90

300–800

30–40

1–2 years

––––

100–150

80–95

• 
  

25–35

2–5 years

12.5–19

12–18.5

85–107

84–106

95–140

80–100

990–1390

25–30

5–12 years

19–38

18.5–40

107–147

106–149

80–120

90–110

1390–1700

20–25

12+ years

49–60

51–56

160–172

160–162

60–100

100–120

3500–4000

15–20

For 1–10 years: weight (kg) = 2

× (age in years + 4)

SBP = 80 + 2

× (age in years)

DBP =

2 ⁄^3

×

SBP mmHg

80–85 mL/kg

Tidal volume =5–7 mL/kg

Table 11.2

Normal paediatric physiological parameters

DBP, diastolic blood pressure; SBP, systolic blood pressure.