Quick Answer
Water temperature significantly affects drowning rescue and resuscitation. For example, hypothermia can set in within 10-15 minutes in water at 50°F (10°C), and in cold water, the risk of cardiac arrest increases by 15-20 times.
Cold Water Immersion Effects
When rescuers encounter a victim in cold water (below 50°F/10°C), they must be aware of the rapid onset of hypothermia. At 50°F (10°C), the body loses heat approximately 10 times faster than in air at 50°F (10°C). The victim’s airway, breathing, and circulation (ABCs) should be assessed, and if necessary, cardiopulmonary resuscitation (CPR) should be initiated. A minimum of two people is recommended for CPR in cold water, with one person providing chest compressions and the other person providing rescue breaths.
Water Rescue Techniques for Cold Water
To rescue a victim in cold water, rescuers should use a throw bag or rescue tube to minimize contact with the water. If the victim is wearing a life jacket or personal flotation device (PFD), it should be left in place to prevent further heat loss. When approaching the victim, rescuers should use a slow and deliberate pace to avoid sudden movements that could cause the victim to become more hypothermic. Once the victim is on board a boat or on shore, they should be wrapped in a warm blanket or emergency blanket to preserve body heat.
Post-Rescue Care and CPR
After rescuing a victim from cold water, rescuers should prioritize rewarming the victim using warm water, warm blankets, or a heating pad set on low. CPR should be continued until the victim shows signs of regaining consciousness, such as coughing, opening their eyes, or responding to verbal commands. Rescuers should also be prepared to administer epinephrine (adrenaline) if the victim’s heart is not beating. The American Heart Association recommends a minimum of 100 chest compressions per minute during CPR in cold water.
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