Compression depth of at least one third applies to which pediatric group?

• A. Infants
• B. Adults
• C. Children under 1 year
• D. Children 1 year up to puberty

Answer: (D)

Compression depth in pediatric CPR is defined as at least a third of the chest’s front-to-back diameter. This fraction-based target helps ensure enough blood flow is delivered while protecting the chest from injury, and it is tailored to the size of the child’s chest. For children from about one year old up to puberty, the standard is to push to at least one third of the chest depth. Infants use a similar principle, but many training materials present their target specifically as approximately one third of chest depth for that age group as well, described separately from older children. Adults, on the other hand, have a deeper, fixed guideline (about 5 cm) that reflects their larger chest and different physiology. Therefore, the depth rule of at least one third best fits the pediatric group from one year up to puberty.