What is the depth target for infant chest compressions?

What is the depth target for infant chest compressions?

• A. About one-third of the anterior-posterior chest diameter (roughly 4 cm)
• B. About one-half of the chest diameter (roughly 5-6 cm)
• C. About one-quarter of the chest diameter (roughly 2 cm)
• D. About two-thirds of the chest diameter (roughly 6 cm)

Answer: (B)

The depth you aim for during infant chest compressions is about one-third of the chest’s front-to-back (anterior-posterior) diameter, which for a typical infant is roughly 4 cm. This specific depth balances generating enough blood flow with the need to protect the ribs and underlying organs—the infant chest is small and fairly compliant, so a depth around one-third is enough to produce perfusion without overshooting into injury. If you compress about half the chest, you risk injuring the ribs or internal structures and may impair chest recoil. If you compress only a quarter of the chest, the perfusion may be inadequate. Compressing two-thirds of the chest is unnecessarily deep and increases injury risk. So, targeting about one-third of the chest depth (around 4 cm) is the best guide for infants.

The depth you aim for during infant chest compressions is about one-third of the chest’s front-to-back (anterior-posterior) diameter, which for a typical infant is roughly 4 cm. This specific depth balances generating enough blood flow with the need to protect the ribs and underlying organs—the infant chest is small and fairly compliant, so a depth around one-third is enough to produce perfusion without overshooting into injury.

If you compress about half the chest, you risk injuring the ribs or internal structures and may impair chest recoil. If you compress only a quarter of the chest, the perfusion may be inadequate. Compressing two-thirds of the chest is unnecessarily deep and increases injury risk. So, targeting about one-third of the chest depth (around 4 cm) is the best guide for infants.