Vital capacity is the maximum amount of air that can be exhaled after a maximum inhalation. It can be dependent on age, sex, height etc and it falls as it grows. male: vital capacity(ml)=(−×age)×height(cm) female: vital capacity(ml)=(−×age)×height(cm). The Normal Spirometry Values are: • Tidal volume is to ml (10 mI/kg). • Inspiratory reserve volume is is 2, to 2, ml. • Expiratory reserve volume is 1,to 1, ml. • Vital capacity is IRV + TV+ERV i.e 4, to 4, ml (75 to 80 mI/kg).Author: Dr Akif.
Vital capacity. A normal adult has a vital capacity between 3 and 5 litres. A human's vital capacity depends on age, sex, height, mass, and ethnicity. Lung volumes and lung capacities refer to the volume of air associated with different phases of the respiratory cycle. Lung volumes are directly measured, whereas lung capacities are inferred from volumes. It is about 80 percent of total capacity, or liters, because some air remains in your lungs after you exhale. Forced vital capacity can decrease by about liters per decade, even for healthy people who have never smoked.
Vital Capacity. Vital capacity (VC) is easily measured with spirometry; decreases in VC point to respiratory muscle weakness. The VC averages approximately 50 mL/kg in normal adults. In the average adult, tidal volume is about liters. However, the lungs can hold a total of about liters, which is close to ten times the tidal volume. This amount is known as the vital capacity. Vital capacity is the maximum volume expelled after maximal inspiration. Vital capacity can only be reached during strenuous exercise.