What are the indexes to measure pulmonary ventilation function?
Normal adults breathe calmly for 400-600ml. Generally calculated in 500ml. 2. Replenish inspiratory volume or inspiratory reserve: The amount of gas that can be inhaled after inhaling is calm is the inspiratory reserve (IRV). Normal adults are 1500-2000 ml. 3, expiratory volume or expiratory reserve: expiratory reserve volume, ERV) is the amount of gas that can be exhaled after the end of expiratory calm. The normal adult is 900- 1200ml.4. Residual volume: The maximum gas left in the lungs at the end of expiration is residual volume (RV). The residual volume of normal adults is 1000- 1500ml. 5. Deep inspiratory capacity: The maximum inspiratory capacity is the inspiratory capacity (IC) when the expiratory calm ends. IC = TV+IrV6, functional residual volume: the amount of gas left in the lungs at the end of calm exhalation, which is called functional residual volume (FRC). Frc = RV+erv.7. Vitality: After trying to inhale, the maximum amount of gas that the lungs can exhale is vital capacity (VC). VC = tv +IRV+ERV. The average adult male is about 3500ml, and the average female is about 2500ml. 8. Forced vital capacity (FVC): refers to the maximum amount of gas that can be exhaled as soon as possible after a maximum inhalation. 9. Forced expiratory volume (FEV) used to be called timed vital capacity, which refers to the amount of gas that can be exhaled in a certain period of time when trying to exhale as soon as possible after a maximum inhalation, usually expressed as a percentage. Under normal circumstances, FEV 1/FVC is about 80%, FEV2/FVC is about 96%, and FEV3/FVC is about 99%. 10. Total lung volume: The maximum amount of gas that the lung can hold is total lung volume (TLC). The average adult male is 5000ml, and the average female is about 3500ml. 1 1. Pulmonary ventilation: the total amount of gas inhaled or exhaled per minute. Equal to the product of tidal volume and respiratory rate. 12. Maximum voluntary ventilation: the maximum amount of gas that can be inhaled or exhaled per minute when trying to take a deep breath quickly. 13. Anatomical invalid cavity: A part of the gas inhaled each time will remain in the respiratory tract between the nose or mouth and the terminal bronchiole, and will not participate in the gas exchange between alveoli and blood, so the volume of this part of the respiratory tract is called anatomical invalid cavity. 14. Alveolar ineffective cavity: The gas entering alveoli can also be partially unable to exchange gas with blood due to uneven blood flow distribution in the lung, which is called alveolar ineffective cavity. 15. Physiologically ineffective cavity: Alveolar ineffective cavity and anatomically ineffective cavity are collectively called physiologically ineffective cavity. 16. Alveolar ventilation: it is the fresh air inhaled into alveoli every minute (equal to tidal volume minus invalid cavity) multiplied by respiratory frequency.