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Alveolar Ventilation Rate

Alveolar Ventilation Rate: This is fundamentally the volume of new air from the atmosphere that enters the alveoli. Because there will always be some capacity of air that occupies “dead space” through the respiratory system, 100 percent of new air that is inhaled won’t arrive in the alveoli. Using the following formula the rate of ventilation for the alveolar can be determined. Simply deduct the physical “dead space” from the “tidal volume”. The ensuing figure is then multiplied by the rate of breathing and this equals the “alveolar ventilation rate”.

For instance, if the physical dead space equals 150 mL, and the tidal volume equals 500 mL, the subtraction will equal 350 mL and then multiplied by the rate of breathing of 12 breaths per minute. The result gives an alveolar ventilation rate of 42000 mL per minute.

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