Anatomical dead space is the portion of the air that is left in the airways after expiration. The reduction of the anatomical dead space is typical for the following situation:

Answer options

1. Tracheostomy
2. Breathing through the mouth
3. Turning the lying patient on his right side
4. Forward flexion of head
5. Turning the lying patient on his left side

Explanation

This is a surgical procedure used to reduce anatomical dead space.