3.3 Infant CPR: Two Fingers, Two Thumbs, and Ventilation
Key Takeaways
- Infant CPR technique is a tested skill, not just a written concept.
- AHA 2025 BLS course FAQ notes infant skills testing includes both heel-of-one-hand and two-thumb-encircling-hands techniques.
- Two-thumb encircling hands can improve compression quality when two rescuers are present.
- Ventilation must be gentle; only enough air to see chest rise.
3.3 Infant CPR: Two Fingers, Two Thumbs, and Ventilation
Infant CPR tests technique, proportion, and ventilation control. Candidates should know hand placement, compression depth, two-rescuer coordination, and what to do when breaths do not produce chest rise.
Current official baseline
The 2025 BLS course completion requirements include hands-on demonstrations, adult CPR/AED skills testing, infant CPR skills testing, and at least 84 percent on the exam. Use the official AHA 2025 BLS Provider Course FAQ page when your course materials or training-center instructions differ from third-party summaries: AHA 2025 BLS Provider Course FAQ.
What you need to know
| Decision point | What to do |
|---|---|
| Technique options | Know the infant techniques your course tests. Current AHA BLS course materials emphasize infant compression methods including heel of one hand and two-thumb encircling hands. |
| Depth | Compress about one third the depth of the infant chest. Do not use adult force. |
| Ventilation | Use small breaths that make the chest rise. Reposition the airway if the chest does not rise. |
| Two rescuers | Two-thumb encircling hands with coordinated breaths often supports better quality when two trained rescuers are present. |
How this shows up on BLS/ACLS questions
BLS and ACLS items usually test priority. Read the patient state first: age, pulse status, breathing status, rhythm, stability, and number of rescuers. Then choose the action that protects perfusion, oxygenation, defibrillation timing, or the correct algorithm branch. If an answer sounds advanced but delays CPR, shock delivery, ventilation, or an urgent stability intervention, it is usually a distractor.
Scenario anchor
An infant is pulseless and apneic. One rescuer starts compressions while another prepares ventilations. If breaths do not move the chest, reposition the airway and try again rather than forcefully squeezing the bag.
Common traps
- Using adult-size breaths for an infant.
- Checking the wrong pulse site or checking too long.
- Failing infant skills testing because hand placement is sloppy.
Study action
Write this section as a one-line rule in your own words, then test it with mixed questions from the BLS/ACLS practice bank. Do not review only the matching topic. Mix it with nearby branches so you can tell when the rule applies and when it does not. For example, compare respiratory arrest with a pulse against pulseless arrest, or compare unstable tachycardia against VF/pVT arrest. The exam rewards that discrimination more than memorizing isolated facts.
What respiratory rate is used for ADULTS during CPR after an ADVANCED AIRWAY has been placed?
For infant CPR performed by a single rescuer, the compression-to-ventilation ratio is: