The normal axillary temperature of a newborn is between which of the following ranges?

AIIMS Bhopal NO - 2018 (Shift-1st)

Child Health Nursing (Pediatrics)

Easy

Appeared in: AIIMS Bhopal NO - 2018 (Shift-1st)

Explanation

The range of 36.5°C to 37.4°C is the established normal axillary temperature for a healthy newborn, a state known as normothermia.
This is the thermoneutral zone where the baby's metabolic rate and oxygen consumption are at their lowest, conserving energy for growth and development.
Maintaining this temperature is crucial for preventing complications like cold stress, hypoglycemia, and metabolic acidosis.
The axillary (armpit) method is the recommended, safest, and most common site for routine temperature measurement in newborns.

Option A: This range (32.5°C to 34°C) represents moderate hypothermia in a newborn, which is a dangerous condition requiring immediate intervention.
Option B: This range (30°C to 32°C) indicates severe hypothermia. At these temperatures, there is a significant risk of tissue hypoxia, metabolic acidosis, and increased mortality.
Option C: This range (40°C to 42°C) represents severe hyperthermia or hyperpyrexia. It is a life-threatening condition, often associated with severe infection (sepsis) or environmental overheating, and can lead to brain damage.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Normal vital signs in newborns, specifically axillary temperature and thermoregulation as background academic context rather than a clinical decision trigger.
A nurse's primary role in the immediate postnatal period is to maintain the 'warm chain'—a series of steps to prevent heat loss in newborns. This includes a warm delivery room, immediate drying, skin-to-skin contact, and early breastfeeding.
Any deviation from the normal temperature range is a critical finding that requires prompt nursing assessment and intervention. Hypothermia can be the first sign of sepsis in a neonate.
What if the newborn is premature? The risk for hypothermia is even greater due to less brown fat for heat production and a larger surface-area-to-mass ratio. This necessitates more vigilant temperature monitoring and environmental support, often in an incubator or radiant warmer.

How to Approach the Question

First, identify the key components of the question: 'normal axillary temperature' and 'newborn'.
This is a factual recall question that tests your knowledge of standard pediatric vital signs.
Mentally recall the accepted normal temperature range for a neonate. The standard range is approximately 36.5°C to 37.5°C.
Systematically evaluate each option against this known range.
Eliminate options that clearly represent abnormal and dangerous temperatures. Ranges below 36.5°C are hypothermic, and ranges above 37.5°C are hyperthermic.
Select the option (36.5 to 37.4°C) that fits squarely within the definition of normothermia for a newborn.

Concept Tested & Keywords

Concept Tested: Normal vital signs in newborns, specifically axillary temperature and thermoregulation.
Stem keywords: normal axillary temperature, newborn, ranges
Lead-in keywords: which of the following

Qe2pX7p8_sMA8x655-MFEV

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 138-140

E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) p. 27-29