Define deadspace ventilation and describe the three different types of deadspace.

What will be an ideal response?

Deadspace ventilation is defined as wasted ventilation or a condition in which ventilation is in excess of perfusion. The conducting airways contribute to about 30% of deadspace ventilation. For a tidal volume of 500 mL, about 150 mL of this volume is wasted since it does not take part in gas exchange. This volume in the conducting airways is called anatomic deadspace and it can be estimated to be about 1 mL/lb of ideal body weight. Alveolar deadspace occurs when the ventilated alveoli are not adequately perfused by pulmonary circulation. Physiologic deadspace is the sum of anatomic and alveolar deadspace volumes.