forced expiratory volumes การใช้

• The test, known as an FEV, for forced expiratory volume, measures how much air someone can exhale in one second.
• It involves testing with methacoline, after which the forced expiratory volume in 1 second ( FEV 1 ) of the patient is measured.
• COPD is defined as a forced expiratory volume in 1 second to forced vital capacity ratio ( FEV1 / FVC ) that is less than 0.7.
• In COPD, there is an increase in airway resistance, shown by a decrease in the forced expiratory volume in 1 second ( FEV1 ) measured by spirometry.
• Further evaluation of a person's respiratory function can be done by assessing the minute ventilation, forced vital capacity ( FVC ), and forced expiratory volume ( FEV ).
• _Forced expiratory volume, which measured the amount of air expired in one second after taking a deep breath and breathing out as hard and fast as possible, provided an indication of the degree of airway obstruction.
• Airflow obstruction not ascribable to other cause is labeled bronchiolitis obliterans syndrome ( BOS ), confirmed by a persistent drop three or more weeks in " forced expiratory volume " ( FEV 1 ) by at least 20 %.
• Decreases in Forced Expiratory Volume in 1 s ( FEV1 ) after allergen challenge after 4 weeks of inhalation of pitrakinra supports the hypothesis that dual inhibition of IL-4 and IL-13 can affect the course of the late asthmatic response after experimental allergen challenge.
• Average values for forced vital capacity ( FVC ), forced expiratory volume in 1 second ( FEV1 ) and forced expiratory flow 25 75 % ( FEF25 75 % ), according to a study in the United States 2007 of 3, 600 subjects aged 4 80 years.
• On spirometry, as a restrictive lung disease, both the FEV1 ( forced expiratory volume in 1 second ) and FVC ( forced vital capacity ) are reduced so the FEV1 / FVC ratio is normal or even increased in contrast to obstructive lung disease where this ratio is reduced.
• The BODE index will result in a score of zero to ten dependent upon FEV 1 or " forced expiratory volume in one second " ( the greatest volume of air that can be breathed out in the first second of a breath ), body-mass index, the distance walked in six minutes, and the modified MRC dyspnea scale.
• The most common parameters measured in spirometry are Vital capacity ( VC ), Forced vital capacity ( FVC ), Forced expiratory volume ( FEV ) at timed intervals of 0.5, 1.0 ( FEV1 ), 2.0, and 3.0 seconds, forced expiratory flow 25 75 % ( FEF 25 75 ) and maximal voluntary ventilation ( MVV ), also known as Maximum breathing capacity.