What best distinguishes mechanical airway obstruction from anatomical airway obstruction?

• A. Mechanical obstruction is blockage by foreign objects or fluids; anatomical obstruction is blockage by the tongue or swollen tissue
• B. Mechanical obstruction is always partial; anatomical obstruction is always complete
• C. Mechanical obstruction involves the lungs; anatomical obstruction involves the stomach
• D. Mechanical obstruction is only in children; anatomical obstruction only in adults

Answer: (A)

The main distinction is the source of the blockage: mechanical obstruction refers to something physically in the airway, such as a foreign object or fluids, blocking the passage. Anatomical obstruction refers to blockage caused by the body's own tissues or structures, like the tongue dropping back in an unconscious person or swelling from trauma, infection, or an allergic reaction narrowing or closing the airway. This is why the best answer says mechanical is blockage by objects or fluids, while anatomical is blockage by the tongue or swollen tissue. The other statements aren’t accurate because both forms can be partial or complete, can occur in any age, and aren’t tied to specific organs like the lungs or stomach.