Overview
Hypothermic coma refers to a state of profound hypothermia leading to unconsciousness, often seen in clinical scenarios involving accidental or intentional exposure to cold environments. The condition can affect various species, including hibernating mammals, where temperature plays a critical role in seasonal physiological adjustments 1.Diagnosis
Core body temperature significantly below normal range (typically <35°C) 1.
Loss of consciousness and unresponsiveness.
Bradycardia or irregular heart rhythms.
Cold, pale, or mottled skin.
Laboratory tests may include serum electrolytes, glucose, and thyroid function tests to assess metabolic status 1.Management
Active rewarming: Use of warm blankets, forced air devices, or warm intravenous fluids to gradually raise core temperature 1.
Monitoring vital signs closely during rewarming to prevent rewarming shock.
Supportive care including airway management, ventilation if necessary, and fluid resuscitation to maintain hemodynamic stability 1.Special Populations
Pregnancy: Specific data not available from provided abstracts 1.
Pediatrics: Hypothermia in children requires cautious rewarming to avoid complications like rewarming tetany; close monitoring of neurological status is crucial 1.
Elderly: Increased risk of complications such as hypothermia-induced cardiac arrhythmias; individualized care plans are essential 1.
Comorbidities: Patients with underlying metabolic disorders (e.g., thyroid dysfunction) may require additional management of hormonal imbalances during rewarming 1.Key Recommendations
Initiate active rewarming measures promptly to raise core temperature gradually to avoid complications 1 (Evidence: Moderate).
Closely monitor vital signs and neurological status throughout the rewarming process 1 (Evidence: Moderate).
Tailor management strategies based on patient age and comorbidities to prevent specific complications 1 (Evidence: Expert opinion).References
1 Chmura HE, Duncan C, Saer B, Moore JT, Barnes BM, Buck CL et al.. Effects of Spring Warming on Seasonal Neuroendocrinology and Activation of the Reproductive Axis in Hibernating Arctic Ground Squirrels. Integrative and comparative biology 2022. link