For infant CPR, the recommended technique is 30 chest compressions followed by 2 rescue breaths, delivered as a two-finger compression on the lower half of the breastbone at about 100 to 120 compressions per minute. Compress at least one-third of the chest's front-to-back depth, roughly 1.5 inches (4 cm), and let the chest fully recoil between compressions. This single-rescuer sequence is the standard taught by the American Heart Association and other major resuscitation councils.
The two-step sequence and why it works
Infant CPR is one technique with two phases that alternate: compressions and breaths. Compressions circulate the small volume of oxygenated blood still in the body. Breaths replenish oxygen the blood has already used. Neither works well alone, which is why the sequence matters as much as either part.
The compression mechanism is a pump. Pressing the lower sternum squeezes the heart between the breastbone and spine, ejecting blood. Releasing lets the chest spring back, drawing blood back into the heart. In a small infant the chest is pliable, so a shallow press moves less blood than rescuers expect. That is why the depth target is a proportion, not a feeling.
The breath mechanism is gas exchange. A rescue breath pushes air into the lungs, where oxygen crosses into blood. An infant's lungs are small and easy to overinflate, so each breath is a gentle puff, not a full adult breath. The goal is visible chest rise, no more.
The two phases are timed by compression count, not clock. Thirty compressions, then two breaths, then repeat. The cycle keeps oxygen delivery moving while limiting interruptions that collapse blood pressure.
Quantified context: numbers that set the target
The compression rate is 100 to 120 per minute, the same range used for adults and children. That cadence is fast enough to sustain flow but slow enough to allow full recoil. Counting aloud helps hold the rate.
Depth is at least one-third of the chest's front-to-back diameter, about 1.5 inches (4 cm) in most infants. Pushing deeper than needed risks injury; pushing shallower fails to move blood. The proportion, not a fixed number, is the governing rule because infant sizes vary.
The compression-to-breath ratio is 30 to 2 for a single rescuer. The ratio keeps compressions dominant because circulation is the priority. Ventilation supports it but does not replace it.
The overall sequence includes calling for help early and starting compressions promptly. Each minute without CPR lowers the chance of survival. Bystander CPR, even imperfect, buys time until advanced care arrives.
Edge cases: one rescuer, two rescuers, and the youngest infants
A lone rescuer uses 30 compressions to 2 breaths. A second trained rescuer can switch to 15 compressions to 2 breaths to raise the compression fraction and reduce fatigue. The switch is a coordination change, not a different core technique.
Newborns in the first minutes after birth are a special case. Their CPR follows a different protocol tied to the delivery room, and rescuers trained for that setting follow it. Outside that setting, the standard infant sequence applies.
Infants with a tracheostomy tube, or those who cannot be ventilated by mouth, need alternative airway handling. This is advanced-rescuer territory. A lay rescuer should still compress and call for help rather than attempt unfamiliar airway maneuvers.
Misconceptions that cost seconds
The most common misconception is that infant CPR uses the adult two-hand stack. It does not. Two fingers on the lower sternum is the standard single-rescuer technique. A second rescuer may use a two-thumb encircling technique for more consistent depth.
Another misconception is that breaths are optional. Compression-only CPR is a reasonable fallback for untrained bystanders, but the recommended infant technique pairs compressions with rescue breaths. The sequence is the full recommendation, not a menu.
A third misconception is that you must find a pulse before starting. Lay rescuers should begin compressions on an unresponsive infant who is not breathing normally. Pulse checks are unreliable and delay action.
The counterintuitive professional caveat: more forceful is not automatically better. Overinflation of the lungs and excessive compression depth both cause harm. Precision, not power, is the target.
Red flag: an infant who is unresponsive and not breathing normally needs CPR immediately, not observation. Red flag: gasping or occasional irregular breaths are not normal breathing and do not rule out the need for CPR. Red flag: do not delay compressions to search for a pulse or to reposition equipment you do not know how to use. Red flag: stop only when the infant shows clear signs of life, trained help takes over, or you are physically unable to continue.
Comparing infant CPR techniques and alternatives
| Technique | Who uses it | Compressions | Breaths | When it applies |
|---|---|---|---|---|
| Two-finger, 30:2 | Single trained rescuer | Two fingers, lower sternum | 2 after every 30 | Standard infant CPR |
| Two-thumb encircling, 15:2 | Two trained rescuers | Both thumbs, hands encircle chest | 2 after every 15 | Second rescuer present |
| Compression-only | Untrained bystander | Continuous | None | Fallback when breaths are not feasible |
| Newborn delivery-room protocol | Trained delivery staff | Per neonatal protocol | Per neonatal protocol | Minutes after birth, trained setting |
| Adult two-hand stack | Not for infants | Two hands | Varies | Wrong technique for an infant |
The table clarifies a single point: the recommended technique is the two-finger, 30:2 sequence for a lone rescuer. Every other row is either a coordinated variant or a fallback.
Timeline: what happens minute by minute
| Time from collapse | What is happening | What the rescuer does |
|---|---|---|
| 0–1 minute | Infant unresponsive, not breathing normally | Check response, call for help, start compressions |
| 1–4 minutes | Oxygen in blood depleting | Maintain 30:2 cycle, full recoil |
| 4–6 minutes | Brain at rising risk without circulation | Continue without long pauses |
| 6–10 minutes | Survival odds fall sharply without CPR | Keep cycle going until help arrives |
| Arrival of advanced care | Trained team takes over | Hand off and report what you did |
The takeaway from the timeline is that the technique is a bridge. Its job is to keep oxygenated blood moving until a trained team and equipment arrive.
Practical actions: how to perform the recommended technique
Confirm the infant is unresponsive and not breathing normally. Tap and shout, then look for chest rise. Call emergency services or direct someone to call, and get an AED if one is nearby. Place two fingers on the lower half of the breastbone, just below the nipple line. Push hard and fast at 100 to 120 per minute, at least one-third of chest depth, about 1.5 inches (4 cm). Let the chest recoil fully between compressions without lifting your fingers off the chest. After 30 compressions, give 2 gentle rescue breaths, each just enough to make the chest rise. Resume compressions immediately and continue the 30:2 cycle until help arrives or the infant recovers.
If a second trained rescuer is present, switch to 15:2 and rotate compressor roles every couple of minutes to limit fatigue. Fatigue degrades depth before it degrades count, and shallow compressions are a silent failure.
For untrained bystanders, compression-only CPR is an acceptable fallback. It is better than nothing, but it is not the full recommended technique.
Limitations and what this guidance cannot cover
This explainer describes the general recommended technique and its mechanisms. It cannot substitute for hands-on training, because depth, rate, and breath volume are physical skills learned on a manikin. Reading about compression depth does not teach your hands what 1.5 inches feels like.
Infant CPR recommendations are updated periodically by resuscitation councils. The stable mechanics described here, compressions plus breaths at a set ratio, are durable. Specific numbers can be revised, so verify against current guidance from a major resuscitation body before teaching or certifying.
Special situations, including suspected airway obstruction, tracheostomy, or a newborn in the delivery room, require protocols beyond this scope. Those cases call for trained responders.
[HIGH-STAKES DISCLAIMER] This article is general educational information about infant CPR technique, not a diagnosis, treatment plan, or certification. It does not promise any outcome. For hands-on instruction, current protocols, or care of a specific infant, consult a qualified local healthcare professional or a certified CPR training program. In an emergency, call your local emergency number immediately.