Final answer:
Spirometry is a technique used to measure lung volumes and capacities. It includes measurements such as FEV1, FVC, FEV1/FVC ratio, PEFR, and FEV25-75. These measurements are used to assess lung function and diagnose lung diseases.
Step-by-step explanation:
The subject being discussed here is Health. Spirometry is a technique used to measure lung volumes and capacities. The important measurements in spirometry include:
Forced Expiratory Volume (FEV1): It measures the amount of air that can be forcibly exhaled from the lungs in one second after taking a deep breath. FEV1 is used to assess lung function.
Forced Vital Capacity (FVC): It measures the total amount of air that can be forcibly exhaled from the lungs after taking a deep breath. FVC provides information about lung capacity.
FEV1/FVC Ratio: It is the ratio of FEV1 to FVC. This ratio is used to diagnose lung diseases. A high ratio indicates lung fibrosis, while a low ratio suggests asthma.
Peak Expiratory Flow Rate (PEFR): It measures the maximum flow rate of air during forced exhalation. PEFR is used to monitor asthma and assess airway obstruction.
FEV25-75: It measures the average flow rate during the middle half of the FVC maneuver. FEV25-75 is another indicator of airway obstruction.