Even before calling 911, the first aid measure that you take on a scene can make all the difference during emergency.

Since almost everyone has been faced with medical emergencies, the following has to be noted:

The American Academy of Pediatrics and other experts say that if a child swallows something you might think is poisonous, don't use syrup of ipecac to induce vomiting. Instead, give them charcoal. The poison binds with the charcoal in the stomach and prevents it from entering the bloodstream.

If poisoning occurs, call the doctor or poison center and bring the product container to the ER.

When a tooth is knocked out, be careful not to handle it by its roots and don't try to clean it. The American Dental Association says the tooth can be re-implanted; just pick up the tooth by the crown and immerse in whole milk, then go as fast as you can to the dentist.

Nose bleeding is one of the emergencies where first aid mistakes are often made. The patient is commonly advised to lean back. Instead, sit upright and lean forward, and pinch the nose just below the nasal bone for 5 to 10 minutes. If the bleeding continues for more than 20 minutes, seek medical attention.