How high is the body temperature in hyperpyrexia?

Appeared in: MP CHO -2019 (Shift-2)

Explanation

Hyperpyrexia is a term for an extremely high fever, which is a medical emergency.
It is clinically defined as a core body temperature that is greater than 105°F (40.6°C).
Some medical literature, like Harrison's Principles of Internal Medicine, specifies an even higher threshold of greater than 41.5°C (106.7°F).
This condition can lead to serious complications, including seizures and brain damage, if not treated promptly.

Option A: The range of 99°F-100°F is considered normal to low-grade fever, not hyperpyrexia.
Option B: A temperature of 100°F-103°F is classified as a moderate fever (pyrexia), which is significant but does not meet the threshold for hyperpyrexia.
Option C: The range of 103°F-105°F is considered a high fever. While serious, it is the category just below hyperpyrexia.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition and temperature range of hyperpyrexia as background academic context rather than a clinical decision trigger.
Recognizing hyperpyrexia is a critical nursing skill as it constitutes a medical emergency requiring immediate intervention to prevent irreversible organ and brain damage.
Nursing priorities include rapid cooling measures, administration of antipyretics, and close monitoring of vital signs and neurological status.
It is crucial to differentiate between fever (caused by pyrogens altering the hypothalamic set point) and hyperthermia (e.g., heatstroke), as hyperthermia does not respond to antipyretic medications and requires aggressive external cooling.

How to Approach the Question

First, identify the key term in the question, which is 'hyperpyrexia'.
This is a factual recall question that requires you to know the specific medical definition of this term.
Recall the different classifications of fever based on body temperature.
Compare the definition of hyperpyrexia with the temperature ranges provided in the options.
Eliminate the options that correspond to normal temperature, low-grade fever, and moderate-to-high fever.
Select the option that correctly defines the temperature threshold for hyperpyrexia.

Concept Tested & Keywords

QLv-eBkTtxIWGOwOwWOsz

E6 Nursing Fundamentals Taylor p. 118-120

E6 Medicine Harrison 22e Part 1 p. 175-177

Practise the full MP CHO -2019 (Shift-2)

Attempt every question from this paper in a timed mock, then review the full solution for each one.