Connecticut Safe Boating Practice Test

What are the stages of hypothermia in order?

1. Post-immersion collapse, cold shock, swim failure, immersion hypothermia

2. Cold shock, swim failure, immersion hypothermia, post-immersion collapse

3. Swim failure, cold shock, post-immersion collapse, immersion hypothermia

4. Immersion hypothermia, swim failure, cold shock, post-immersion collapse

The correct answer is: Cold shock, swim failure, immersion hypothermia, post-immersion collapse

The stages of hypothermia are critical to understanding how the body reacts to cold water exposure. The correct sequence starts with cold shock, which is the immediate and intense reaction to sudden immersion in cold water. This can cause involuntary gasping and hyperventilation, potentially leading to drowning if a person is not prepared. Following cold shock, swim failure occurs, where a person's ability to swim is compromised due to muscle fatigue and loss of coordination caused by the cold setting in. During this stage, an individual may struggle to keep their head above water. Next is immersion hypothermia, where the body loses heat more rapidly in the water, leading to dangerously low body temperatures. This stage can result in confusion, reduced physical capabilities, and a risk of unconsciousness. Finally, post-immersion collapse may occur when individuals are removed from the cold water. Their bodies may continue to lose heat, and they may experience a sudden drop in blood pressure and potential cardiovascular collapse. This sequence highlights the progressive nature of hypothermia, emphasizing the urgency needed in cold-water situations to prevent severe outcomes. Understanding these stages can guide safety measures and rescue strategies for those who find themselves in cold-water emergencies.