What is the respiratory rate range for an infant (1 month to 1 year)?

What is the respiratory rate range for an infant (1 month to 1 year)?

• A. 25 to 50
• B. 12 to 20
• C. 30 to 60
• D. 40 to 70

Answer: (A)

Infants breathe faster and more variably than older children and adults, and normal values depend on age and state (resting, sleeping, or reacting to a cause like fever or crying). For an infant from 1 month to 1 year, a typical resting respiratory rate is around the mid-20s to mid-50s breaths per minute. The range of 25 to 50 fits this window well, allowing for slightly lower rates when calm or asleep and higher rates when the infant is awake or unsettled, while still staying within a normal spectrum. Other ranges don't fit as well. A rate of 12–20 is more like adult norms and is too low for this age group. A range of 30–60 is plausible but misses lower normal rates that occur in calm infants and can imply a higher baseline than usual. A range of 40–70 is too high for resting infants and would capture rates that suggest distress or illness.

Infants breathe faster and more variably than older children and adults, and normal values depend on age and state (resting, sleeping, or reacting to a cause like fever or crying). For an infant from 1 month to 1 year, a typical resting respiratory rate is around the mid-20s to mid-50s breaths per minute. The range of 25 to 50 fits this window well, allowing for slightly lower rates when calm or asleep and higher rates when the infant is awake or unsettled, while still staying within a normal spectrum.

Other ranges don't fit as well. A rate of 12–20 is more like adult norms and is too low for this age group. A range of 30–60 is plausible but misses lower normal rates that occur in calm infants and can imply a higher baseline than usual. A range of 40–70 is too high for resting infants and would capture rates that suggest distress or illness.