What is the most common cause of airway obstruction in unconscious patients?

• A. Swelling of the throat
• B. The tongue falling back into the throat
• C. Foreign body obstruction
• D. Excessive saliva

Answer: (B)

The most common cause of airway obstruction in unconscious patients is indeed the tongue falling back into the throat. When a person is unconscious, the muscles in the throat, including those that normally hold the tongue in place, relax. This relaxation can cause the tongue to move posteriorly, which then obstructs the airway. This is particularly relevant because an obstructed airway can quickly lead to insufficient oxygen reaching the lungs, causing serious health complications.

In unconscious patients, the loss of muscle tone contributes significantly to airway management challenges. Helping to manage an unconscious patient’s airway frequently involves repositioning the head or using adjunctive airways to lift the tongue off the back of the throat and maintain a patent airway.

The other potential causes listed may occur but are less common in the context of unconsciousness. For example, swelling of the throat can happen due to allergic reactions or infections, foreign bodies could obstruct the airway but are less likely in a non-responsive individual without any prior context of choking, and while excessive saliva can contribute to airway issues, it is typically not the primary cause of obstruction in unconscious patients like the falling tongue is. Thus, understanding the basic anatomy and physiological responses in unconscious individuals is key to recognizing why the tongue is such a prominent concern for airway management in