Hypothermia Management

Initial Stabilization and Heat Loss Prevention

The American College of Critical Care Medicine recommends immediately initiating active rewarming measures for all hypothermic patients (core temperature <35°C) to achieve normothermia, as hypothermia independently increases mortality, bleeding risk, and coagulopathy 1, 2
Removing wet clothing immediately and moving the patient to a warm environment is crucial to prevent further heat loss, as recommended by the Critical Care Society 2, 3

The Critical Care Society recommends using esophageal or oral probes for accurate core temperature monitoring when pulmonary artery catheters are not warranted 2
Tympanic infrared probes serve as acceptable alternatives when oral measurement is not feasible, according to the Critical Care Society 2
The Critical Care Society advises against using axillary measurements as they consistently read 1.5-1.9°C below actual core temperature, leading to inaccurate treatment decisions 2

For mild hypothermia (32-35°C), the Critical Care Society recommends allowing passive rewarming with blankets and increasing environmental temperature 2
For moderate hypothermia (28-32°C), the Critical Care Society suggests applying forced-air warming blankets as the primary active rewarming method 2, 3, 4
For severe hypothermia (<28°C), the Critical Care Society recommends continuing all measures for moderate hypothermia and considering active core rewarming methods including body cavity lavage or extracorporeal rewarming (ECMO) 2, 3

The Critical Care Society recommends targeting a minimum core temperature of 36°C before considering the patient stable 2, 3, 4
The Critical Care Society advises ceasing rewarming at 37°C, as higher temperatures are associated with poor outcomes 2, 3, 4

The Critical Care Society recommends continuously monitoring for cardiac arrhythmias, particularly bradycardia and ventricular fibrillation 2, 3, 4
The Critical Care Society suggests monitoring for coagulopathy, as each 1°C drop in temperature causes a 10% drop in coagulation factor function 1, 5, 6

The Critical Care Society advises against using cold IV fluid boluses for treating accidental hypothermia, as this is only indicated for therapeutic hypothermia 2
The Critical Care Society recommends not assuming coagulopathy is absent based on standard laboratory tests run at 37°C, as body temperatures below 34°C compromise blood coagulation 1, 5, 6

The Critical Care Society recommends aggressively correcting hypothermia in trauma patients without TBI, as it represents an independent risk factor for bleeding and death 1, 5, 6
For patients with isolated TBI after hemorrhage has been controlled, the Critical Care Society suggests considering prolonged hypothermia at 33-35°C for ≥48 hours, as long-term cooling (>48 hours) shows mortality benefit and improved neurologic outcomes compared to short-term cooling (≤48 hours) 1