Skip to content

What Kind of Adults Are These?

NextGen Learning To Elevate Your Airway Practice

IntroductionPhysiologyWhat’s Next

Overview

Here, we’re talking about something every airway clinician needs to master—how the physiology of infants and children differs from adults and why that changes some things when it comes to airway management. Newborns don’t compensate well, and small mistakes have big consequences. Understanding these physiological nuances helps ensure that airway interventions are successful and safe, minimizing the risk of hypoxia, bradycardia, and rapid decompensation. Every second counts in a newborn airway!

Key Physiological Differences

  • Higher oxygen consumption (6-8 mL/kg/min vs. 3-4 mL/kg/min in adults) → Faster desaturation during apnea.
  • Lower functional residual capacity (FRC) → Less oxygen reserve, making preoxygenation crucial.
  • Higher baseline respiratory rate & heart rate → Less tolerance for apnea and hypoxia.
  • Greater vagal tone → More prone to bradycardia with airway manipulation, necessitating premedication (e.g., atropine in certain cases).
  • Lower total blood volume → Hypotension can occur rapidly with hypovolemia or sedative agents.
  • Immature chemoreceptors → Blunted response to hypoxia and hypercapnia in premature infants.
  • Increased airway resistance (due to smaller diameter) → Small amounts of edema or secretions can significantly increase work of breathing (Poiseuille’s Law).
  • Greater metabolic demand & limited compensatory mechanisms → Increased susceptibility to hypothermia, acidosis, and rapid decompensation.

The Impact on Your Plan

The Bottom Line

When managing a newborn’s airway, it’s critical to understand how their physiology differs from adults. Understanding these physiological nuances helps ensure that airway interventions are not only successful but also safe, minimizing the risk of hypoxia, bradycardia, and rapid decompensation.

What’s Next

Find Or Click Me

Nice work—you’re through this section! To keep going, scan the QR code on the physical poster at the next station in our pop-up training space to access the next set of digital content. Prefer to stay online? Just click the poster image here to continue your journey.

digital Home
Back to the Top
Follow Us