New York State Basic Emergency Medical Technician (EMT-B) Practice Exam

Where should autoinjectors be administered?

1. Upper arm

2. Stomach

3. Chest

4. Lateral thigh, midway between the waist and the knee

The correct answer is: Lateral thigh, midway between the waist and the knee

Autoinjectors, commonly used for administering medications such as epinephrine in cases of severe allergic reactions, should be administered in the lateral thigh, midway between the waist and the knee. This specific site is ideal for several reasons. First, the thigh is a large muscle area that allows for deep intramuscular injection, which is essential for ensuring that the medication is absorbed quickly into the bloodstream. This rapid absorption is critical in emergency situations, where time is of the essence, especially in anaphylaxis. Second, injecting into the lateral thigh reduces the risk of hitting major blood vessels and nerves, which can happen if the injection is performed in less suitable areas, such as the upper arm or the abdomen. The thigh is also easily accessible for self-administration or administration by another person in an emergency, making it practical in urgent situations. Other options, such as the upper arm, stomach, or chest, are not recommended primarily due to concerns about absorption rates and safety. These areas may not provide the same rapid effect as the lateral thigh, making them less effective for treating acute, life-threatening conditions.