| Zone (Length Range) | Estimated Weight | Airway | Circulation | Medications (Weight‑Based) | Equipment |
|---|---|---|---|---|---|
| Zone 1 45–55 cm |
3 kg | ETT 3.0 uncuffed Depth 9–10 cm LMA size 1 Blade: Miller 0 |
Fluid bolus: 30 mL (10 mL/kg) Defib: 6 J (2 J/kg) CPR: 100–120/min, 1.5 in depth |
Epi 1:10,000 = 0.03 mg Amiodarone = 15 mg Adenosine = 0.3 mg → 0.6 mg Atropine = 0.06 mg Ketamine = 3–6 mg IV |
NG/OG 6–8 Fr Foley 6 Fr BP cuff: neonatal |
| Zone 2 55–65 cm |
5 kg | ETT 3.5 uncuffed Depth 10–11 cm LMA size 1 Blade: Miller 0–1 |
Fluid bolus: 50 mL Defib: 10 J CPR depth: 1.5–2 in |
Epi = 0.05 mg Amiodarone = 25 mg Adenosine = 0.5 mg → 1 mg Atropine = 0.1 mg Ketamine = 5–10 mg IV |
NG/OG 8 Fr Foley 6–8 Fr BP cuff: infant |
| Zone 3 65–75 cm |
8 kg | ETT 3.5–4.0 Depth 11–12 cm LMA size 1.5 Blade: Miller 1 |
Fluid bolus: 80 mL Defib: 16 J CPR depth: 2 in |
Epi = 0.08 mg Amiodarone = 40 mg Adenosine = 0.8 mg → 1.6 mg Atropine = 0.16 mg Ketamine = 8–16 mg |
NG/OG 8–10 Fr Foley 8 Fr BP cuff: infant |
| Zone 4 75–85 cm |
10 kg | ETT 4.0 uncuffed / 3.5 cuffed Depth 12–13 cm LMA size 1.5 |
Fluid bolus: 100 mL Defib: 20 J CPR depth: 2 in |
Epi = 0.1 mg Amiodarone = 50 mg Adenosine = 1 mg → 2 mg Atropine = 0.2 mg Ketamine = 10–20 mg |
NG/OG 10 Fr Foley 8–10 Fr BP cuff: child small |
| Zone 5 85–95 cm |
14 kg | ETT 4.5 cuffed Depth 13–14 cm LMA size 2 |
Fluid bolus: 140 mL Defib: 28 J |
Epi = 0.14 mg Amiodarone = 70 mg Adenosine = 1.4 mg → 2.8 mg Atropine = 0.28 mg |
NG/OG 10–12 Fr Foley 10 Fr BP cuff: child |
| Zone 6 95–110 cm |
18 kg | ETT 5.0 cuffed Depth 15–16 cm LMA size 2 |
Fluid bolus: 180 mL Defib: 36 J |
Epi = 0.18 mg Amiodarone = 90 mg Adenosine = 1.8 mg → 3.6 mg Atropine = 0.36 mg |
NG/OG 12 Fr Foley 10–12 Fr BP cuff: child |
| Zone 7 110–125 cm |
22 kg | ETT 5.5 cuffed Depth 16–17 cm LMA size 2.5 |
Fluid bolus: 220 mL Defib: 44 J |
Epi = 0.22 mg Amiodarone = 110 mg Adenosine = 2.2 mg → 4.4 mg Atropine = 0.44 mg |
NG/OG 12–14 Fr Foley 12 Fr BP cuff: child medium |
| Zone 8 125–140 cm |
30 kg | ETT 6.0 cuffed Depth 18–19 cm LMA size 3 |
Fluid bolus: 300 mL Defib: 60 J |
Epi = 0.3 mg Amiodarone = 150 mg Adenosine = 3 mg → 6 mg Atropine = 0.6 mg |
NG/OG 14 Fr Foley 12–14 Fr BP cuff: child large |