What is the immediate First Aid given to a person who has suffered a burn or a scald?
Pouring clean cold water rapidly cools skin tissue temperature, reduces pain and swelling, stops deeper cellular damage, and minimizes blister formation.
Why should a first aider NEVER induce vomiting in a casualty who has swallowed paraffin or kerosene?
Paraffin and acids are corrosive. If vomited, they re-burn the delicate lining of the gullet and can enter the lungs, causing chemical pneumonia.
What is the primary physiological cause of fainting in humans?
Fainting (syncope) occurs when cerebral blood flow is temporarily reduced, depriving brain cells of oxygen.
Why are the legs of a fainted casualty elevated higher than their head during First Aid?
Raising the legs uses gravity to rush venous blood from the lower extremities directly back to the heart and brain.
Why must a first aider NEVER burst blisters formed on a burn injury?
Unbroken blisters keep airborne bacteria away from exposed deep dermis cells. Piercing them opens the door to severe bacterial infections.
What should you do if an insect crawls inside a person's ear canal?
Pouring a few drops of clean oil or lukewarm water will gently float the insect out or suffocate it so it can be safely removed.