Forced expiratory volume
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Decreased the FEV1 %
The FEV1 (%) at a radius of 5 mm is 73.9% (3541/4791 X 100%).
Emphysema caused by cigarette smoking has a variable prognosis. Studies have shown a 40% 12 year survival rate for patients with FEV1 of 1.25 L, and 5% for those with FEV1 of 0.75 L. A 40% 12 year survival rate is interpreted as 40% of those with emphysema will live up to 12 years. FEV1 stand for forced expiratory volume in 1 second. It is a measure of lung function.
FEV1 is an index that is used to determine how much restrictive or obstructive lung disease is present in a person's lungs. If the FEV1 level is 70% or less then it is standard practice for medication to be given.
FEV1 stands for Forced Expiratory Volume in 1 second, which is a measure of lung function. It indicates the amount of air a person can forcefully exhale in one second after taking a deep breath. FEV1 is commonly used in assessing respiratory conditions such as asthma and chronic obstructive pulmonary disease (COPD).
Factors that can affect FEV1 (forced expiratory volume in one second) include age, gender, lung size, airway obstruction, smoking, and certain medical conditions such as asthma or chronic obstructive pulmonary disease (COPD). Regular physical activity and maintaining a healthy lifestyle can also influence FEV1.
Generally, most flow meters are very accurate in FEV1. However, device accuracy is not especially important, rather it is essential that you take multiple measurements to calculate an accurate working average.
In asthmatics, the airways become narrowed due to inflammation and constriction of the smooth muscles around the airways. This leads to difficulty in exhaling air from the lungs, resulting in a lower FEV1 (forced expiratory volume in 1 second) value. Additionally, increased mucus production in the airways can further contribute to decreased airflow and lower FEV1 measurements in asthmatics.
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measurement of lung function through spirometry yielding values including FEV1, FVC, FEV1/FVC ration PEF and FEF 25-75: 50, 75 aned soemtimes 85 % of predicted value
FVC measures the amount of gases expelled when a subject takes a deep breath & then forcefully exhales maximally and as rapidly as possible. FEV1 determines the amount of air expelled during the first second.
The FEV1 value at an initial radius of 5.00 mm would depend on the specific pulmonary function test results for an individual. FEV1, or Forced Expiratory Volume in one second, is a measure of lung function that can be influenced by various factors like age, sex, and overall health. Therefore, without additional information, it is not possible to determine the exact FEV1 value at a specific initial radius.