Infectious Disease, Thermoregulation, and Environmental Physiology
Infection
Neonatal sepsis may present only as temperature instability, poor feeding, apnea, or lethargy; group B streptococcus, E. coli, and Listeria are classic early-onset pathogens. Apply standard and transmission-based precautions, maintain sterile line practice, and remember that isolation precautions do not stop the clock on a time-critical transfer. Respiratory and varicella pathogens require droplet or airborne precautions per policy.
Thermoregulation
Heat is lost by evaporation, conduction, convection, and radiation. Preterm and low-birth-weight infants are vulnerable because of large surface area, little subcutaneous fat, and immature thermoregulation. Hypothermia raises oxygen consumption, glucose use, and acidosis, and increases mortality. Use a pre-warmed incubator, warm humidified gases, plastic wrap and hats for preterm infants, and continuous skin-temperature servo monitoring. Hyperthermia is equally harmful.
Environmental physiology
In flight, cabin altitude falls to a rough equivalent of 6,000–8,000 feet, lowering alveolar oxygen partial pressure in patients already at the limits of reserve. Trapped gas expands - pneumothorax, ileus, and cuffed tubes can worsen. Noise, vibration, and gravitational forces degrade monitoring and comfort.
Traps
Do not place a cold infant into an unwarmed incubator, and do not overheat a patient receiving therapeutic hypothermia. Do not assume a saturation acceptable at sea level is adequate at altitude.
Rule of thumb
Servo-control abdominal skin temperature to keep core 36.5–37.5 °C while minimizing oxygen consumption, and reassess the setting as the infant warms.