In patients with hypothermia, which intervention is contraindicated?

In cases of hypothermia, the rapid administration of warm fluids is contraindicated primarily due to the risk of causing a sudden shift in temperature that can lead to complications such as cardiac arrhythmias. Rapid rewarming of the core can lead to a situation known as "rewarming shock," where the heart is affected by a sudden influx of warm blood from the periphery to the core. This can destabilize the cardiovascular system in patients who are already at risk due to their hypothermic state.

In contrast, using warm blankets, provided ambient heat, and encouraging active movement (if not contraindicated by the extent of hypothermia or other neurological issues) are all supportive measures aimed at gently rewarming the patient. These methods allow for a more controlled rewarming process, reducing the likelihood of adverse events associated with rapid temperature changes. It is important to approach rewarming in a graduated manner to safely restore the patient's normal body temperature without causing further harm.