Table 2.

Functional probes in children for various ages extracted from literature review [3,15,49].

Indicator	Units	1 Week	1 Year	3 Years	5 Years	8 Years	10 Years
Height (average values)	cm	48–52	75	96	100	130	140
Weight (average values)	kg	3	10	14.5	18	26	33
FRC 1	mL	75	263	532	660	1174	1546
VC 2	mL	100	475	910	1200	1885	2358
Ventilation	mL/min	550	1175	2460	2600	3240	3458
Vt 3	mL	17	78	112	130	180	217
Respiratory frequency	breaths/min	30	24	22	20	18	16
Pulse rates 4 (low–high)	-	100–160	100–160	90–150	80–140	70–120	60–100
Low-normal systolic blood pressure	-	>60	>70	>75	>75	>80	>90

¹ Functional Residual Capacity (FRC)—volume of gas that remains in lungs at the end of a normal expiration; ² Vital capacity (VC)—volume of gas that enters in lungs during maximum inhaling; ³ Current Volume (Vt)—volume of gas inhaled or exhaled during a ventilation cycle; ⁴ When sleeping, the pulse rates of a child may be 10% lower.