Age Groups & Vital Signs
Definitions, weight, ETT, vital sign tables
Age Groups & Vital Signs
Normal vital sign ranges by age · tap to zoom
Definitions
- Neonate/Newborn: Birth to 28 days (Pre-term <37 wks, Term 37–42 wks, Post-term >42 wks)
- Infant: Birth to 1 year
- Toddler: 1 to 3 years
- Pre-Schooler: 3 to 5 years
- School Age: 6 to 10 years
- Pre-Adolescent: 10 to 12 years
- Adolescent: 13 to 18 years
Age-Based Reference Table
| Parameter | Preterm | Term | 6 mo | 1 yr | 3 yr | 6 yr | 8 yr | 10 yr |
|---|---|---|---|---|---|---|---|---|
| Weight (lbs) | 3 | 7.5 | 15 | 22 | 33 | 44 | 55 | 66 |
| Weight (kg) | 1.5 | 3.5 | 7 | 10 | 15 | 20 | 25 | 30 |
| Heart Rate | 140 | 125 | 120 | 110 | 100 | 100 | 90 | 90 |
| Respirations | 40–60 | 40–60 | 24–36 | 22–30 | 20–26 | 20–24 | 18–22 | 18–22 |
| Systolic BP | 50–60 | 60–70 | 60–120 | 65–125 | 100 | 100 | 105 | 110 |
| ETT (mm) | 2.5–3 | 3.5 | 3.5 | 4.0 | 4.5 | 5.5 | 6.0 | 6.5 |
| LMA Size | 1 | 1 | 1 | 1.5 | 2 | 2–2.5 | 2.5 | 2.5–3 |
ETT Size & LMA Reference
| Age | Est. Weight | ETT Size | Depth (cm) |
|---|---|---|---|
| Pre-term | 1 kg | 2.5 | 6 |
| Term | 2.5 kg | 3 | 7–9 |
| To 6 months | 4–8 kg | 3.5 | 10 |
| 1–2 yrs | 10–12 kg | 4 | 12 |
| >2 yrs | >12 kg | 4–5 | 12–15 |
ETT Size Formula
ETT Size = (Age ÷ 4) + 4
ETT Depth = 3 × ETT size
Weight Estimate
Weight = 2 × Age + 8 (or 10)
B/P systolic = 2 × Age + 70
← swipe to navigate →