Weight-based calculator
NRP 9e p.67–68 (Table 4-2), p.102 (Table 5-1), p.113–114 (Table 5-3), p.148–154
Rounding: mL to 2 decimals and mg to 3 decimals (half rounds up). Weight is used to the nearest gram. GA with decimals is read as completed weeks (e.g. 34.6 → 34).
The algorithm at a glance
Redrawn from NRP 9e Figure 1.3, p.7 (Neonatal Resuscitation Program Algorithm)
PPV settings and oxygen
NRP 9e Table 4-1 p.67, Table 4-2 p.68, Table 4-3 p.70; p.76–77, p.136, p.177
| Setting | Start with |
|---|---|
| Rate | 30–60 breaths/min (“Breathe, two, three”) |
| Inflation pressure | 25 cm H2O (≥ 32 wk 25–30; < 32 wk 20–25) |
| Face mask max | 40 cm H2O term; 30 cm H2O preterm |
| PEEP | 5 cm H2O |
| Gas flow | 10 L/min |
Initial FiO2
| Gestational age | Initial FiO2 |
|---|---|
| ≥ 35 weeks | 21% |
| 32–34 weeks | 21–30% |
| < 32 weeks | ≥ 30% may be considered |
| Chest compressions | 100% |
Adjust FiO2 by 20–30% every 30 s to reach the target.
Target pre-ductal SpO2 (right hand)
| Time after birth | Target SpO2 |
|---|---|
| 2 min | 65–70% |
| 3 min | 70–75% |
| 4 min | 75–80% |
| 5 min | 80–85% |
| 10 min | 85–95% |
< 32 weeks: reaching 80–85% by 5 min is important.
Airway
NRP 9e Table 4-3 p.70; p.69–75, p.82–83, p.95, p.102–103 (Table 5-1), p.110–116 (Table 5-3), Table 5-4 p.119
MR SOPA: until the chest moves
| M | Mask: reapply; consider the 2-hand hold |
| R | Reposition: head neutral or slightly extended |
| S | Suction mouth and nose |
| O | Open the mouth |
| P | Pressure: increase by 5 cm H2O (mask max 40 term, 30 preterm) |
| A | Alternative airway: endotracheal tube or laryngeal mask |
Try ventilation after each step. When the chest moves, say “The chest is moving NOW”, give 30 s of effective ventilation, then check the HR.
Endotracheal tube size (Table 5-1, p.102)
| Weight | GA (wk) | ETT ID (mm) | Suction (F) |
|---|---|---|---|
| < 800 g | 22–25 | 2.5* | 5 |
| 800–1,200 g | 26–28 | 2.5 | 5 or 6 |
| 1,201–2,200 g | 29–34 | 3.0 | 6 or 8 |
| > 2,200 g | > 34 | 3.5 | 8 |
* 2.0 mm may be considered for extremely preterm babies under about 750 g.
Blade (straight): No. 1 term; No. 0 preterm; some use No. 00 for extremely preterm. Suction 80–100 mm Hg.
Insertion depth (“tip-to-gum”, upper gum)
Table 5-3: initial depth by GA / weight (p.114)
| GA (wk) | Depth at gum | Weight |
|---|---|---|
| < 23 | 5.0–5.5 cm | < 500 g |
| 23–24 | 5.5 cm | 500–600 g |
| 25–26 | 6.0 cm | 700–800 g |
| 27–29 | 6.5 cm | 900–1,000 g |
| 30–32 | 7.0 cm | 1,100–1,400 g |
| 33–34 | 7.5 cm | 1,500–1,800 g |
| 35–37 | 8.0 cm | 1,900–2,400 g |
| 38–40 | 8.5 cm | 2,500–3,100 g |
| 41–43 | 9.0 cm | 3,200–4,200 g |
Both methods are estimates: listen to both axillae. X-ray: tip in the mid-trachea, near T1–T2.
Confirm a tube or laryngeal mask
- Primary: exhaled CO2 within 8–10 breaths + rapidly rising HR
- Equal breath sounds in both axillae, symmetric chest movement, little air over the stomach
- Intubation: aim to finish in about 30 s; if the baby worsens, stop and ventilate
Laryngeal mask
- First ventilation device or alternative to intubation; sizes 0–1
- May be too large for extremely preterm babies; lower weight limit not established
- Not studied for suctioning; insufficient evidence for intratracheal drugs
Sudden deterioration after intubation: DOPE
| D | Displaced tube |
| O | Obstructed tube |
| P | Pneumothorax |
| E | Equipment failure |
Compressions and medicines
NRP 9e p.129–137; p.145–163, Table 7-1; p.217
Chest compressions
- Start: HR < 60 after at least 30 s of ventilation that moves the chest (ideally via tube or laryngeal mask)
- Two thumbs, lower third of the sternum, just below the nipple line; depth 1/3 of chest diameter
- 3:1 every 2 s: 90 compressions + 30 breaths = 120 events/min (“One-and-Two-and-Three-and-Breathe”)
- FiO2 100%; check HR after 60 s (ECG preferred)
- Stop when HR ≥ 60; then ventilate 30–60/min
Epinephrine: only 0.1 mg/mL (1 mg/10 mL)
| Route | Dose | Volume | Then |
|---|---|---|---|
| IV / IO (preferred) | 0.02 mg/kg (0.01–0.03) | 0.2 mL/kg (0.1–0.3) | Push fast; 3 mL NS flush |
| ET | 0.1 mg/kg (0.05–0.1) | 1 mL/kg (0.5–1) | No flush; give breaths |
- Indication: HR < 60 after 30 s effective ventilation + 60 s coordinated compressions with 100% O2
- Repeat every 3–5 min; check HR 1 min after a dose
- ET dose only while getting vascular access; never give the ET dose IV
→ Calculate for a specific weight
Volume expansion
Umbilical venous catheter (first choice)
- 3.5F or 5F single-lumen catheter, filled with normal saline
- Cut the cord about 2 cm above the skin
- Insert 3–4 cm beyond the abdominal wall until blood flows freely; less in extremely preterm babies
- Do not go deeper: drugs into the liver can cause injury
- Omphalocele: UVC cannot be used; use IO
Intraosseous needle (reasonable alternative)
- Term: flat surface of the lower leg, about 2 cm below and 1–2 cm medial to the tibial tuberosity
- Flush 3–5 mL normal saline
- Risks: extravasation, infection, fracture, limb ischemia; success in very preterm babies unknown
Peripheral IV is not recommended for emergency drugs in cardiovascular collapse.
HR still < 60? Check (Table 7-1)
- Chest moving with each breath?
- Airway secured with a tube or laryngeal mask?
- 3 compressions + 1 breath every 2 s? Depth 1/3?
- Device giving 100% oxygen?
- Epinephrine dose and route correct (IV/IO)?
- UVC or IO still in place?
- Pneumothorax or pericardial effusion?
Also think: hypovolemia (pale, delayed capillary refill, weak pulses, acute blood loss).
Special situations
NRP 9e p.30–49; p.174–183; p.201–213; p.33, p.152–158
Meconium, not vigorousMeconium-stained fluid, baby not vigorous → initial steps, PPV if needed; no routine tracheal suction
Routine laryngoscopy ± tracheal suction is not suggested. Initial steps; PPV within 60 s if apneic or HR < 100. Intubate and suction only if PPV does not inflate the lungs and obstruction is suspected.
NRP 9e p.30, p.46–49
Preterm < 32 weeksBorn before 32 weeks → plastic wrap without drying, CPAP if breathing, PIP 20–25
- Room 23–25 °C, thermal mattress, hat
- Do not dry: plastic bag/wrap to the neck
- CPAP 5–6 cm H2O if breathing, HR ≥ 100
- PIP 20–25; mask max 30
- No cord milking < 28 wk
- No head-down tilt; slow fluids
NRP 9e p.174–183
PneumothoraxSudden distress, decreased breath sounds on one side → needle aspiration
Sudden distress or no improvement; decreased breath sounds; increased transillumination.
Needle: 4th ICS anterior axillary line or 2nd ICS midclavicular line, 20- or 24-gauge catheter-over-needle, over the top of the rib.
Pleural effusion: 5th or 6th ICS, posterior axillary line. ICS = intercostal space. NRP 9e p.201–207
Congenital diaphragmatic hernia (CDH)CDH suspected → no face mask; intubate and decompress the stomach
No face-mask ventilation. Intubate promptly; 10F orogastric tube with suction. PIP limit 25 cm H2O (consensus). Pre-ductal SpO2 may not exceed 80–85% at first.
NRP 9e p.201, p.212–213
Robin sequenceAirway obstruction → prone; 2.5 mm tube through the nose, tip in the pharynx
Prone. 2.5 mm tube through the nose, tip in the pharynx (not the trachea). Still obstructed: laryngeal mask.
NRP 9e p.201, p.210–211
Bilateral choanal atresiaThin catheter will not pass the nose → tube in the mouth, tip in the posterior pharynx
Thin catheter will not pass the nose. Tube in the mouth, tip in the posterior pharynx.
NRP 9e p.201, p.211
Hypovolemic shockPale, delayed capillary refill, weak pulses after blood loss → NS 10 mL/kg over 5–10 min
Abruption, bleeding previa, cord avulsion: clamp the cord now. Emergency UVC; NS 10 mL/kg over 5–10 min, or O Rh-negative red cells.
NRP 9e p.33, p.152–158
After resuscitation
NRP 9e p.188–197
- Temperature 36.5–37.5 °C; avoid overheating
- Glucose: check soon after birth and at regular intervals until stable and normal; IV dextrose may be needed (use local thresholds)
- Therapeutic hypothermia: ≥ 36 weeks with moderate to severe HIE; start within 6 h of birth; cooling for 3 days. No program: call the referral centre as soon as you suspect a candidate; avoid overheating and excessive cooling in transport.
- No routine sodium bicarbonate; no routine volume without hypovolemia
Stopping and ethics
NRP 9e p.155, p.222–227
- No heart rate after all appropriate steps: discuss with the team and family
- Reasonable time frame: around 20 min after birth, individualized
- Best interest of the baby; parents share decisions
- Withholding and withdrawing are ethically equivalent
- Compassionate comfort care for every baby not resuscitated
- Written for the US and Canada; adapt to local context