Tachypnea in a 4-month-old child is respiratory rate more than
**Core Concept**
Tachypnea in infants is a vital sign indicating respiratory distress or disease. In children under 2 years, normal respiratory rates differ significantly from those in adults. The American Academy of Pediatrics (AAP) defines tachypnea in infants as a respiratory rate greater than 60 breaths per minute (bpm).
**Why the Correct Answer is Right**
In a 4-month-old child, a respiratory rate exceeding 60 bpm is considered tachypneic. This is because the normal respiratory rate for infants at this age is typically between 40-60 bpm. Tachypnea can be caused by various conditions, including respiratory infections, cardiac disease, or metabolic disorders. The increased respiratory rate is a compensatory mechanism to ensure adequate oxygenation and CO2 removal from the body.
**Why Each Wrong Option is Incorrect**
**Option A:** This value is too low and would not be considered tachypneic in a 4-month-old child.
**Option B:** This value is within the normal range for a 4-month-old child and would not indicate respiratory distress.
**Option C:** This value is also within the normal range and would not be consistent with tachypnea.
**Clinical Pearl / High-Yield Fact**
When assessing a child's respiratory rate, it's essential to consider their age and individual developmental milestones. For infants under 2 years, a respiratory rate exceeding 60 bpm is generally considered tachypneic and warrants further investigation.
**Correct Answer: D. 60**