FEF


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flow

 [flo]
1. the movement of a liquid or gas.
2. the amount of a fluid that passes through an organ or part in a specified time; called also flow rate.
forced expiratory flow (FEF) the rate of airflow recorded in measurements of forced vital capacity, usually calculated as an average flow over a given portion of the expiratory curve; the portion between 25 and 75 per cent of forced vital capacity is called the maximal midexpiratory flow. Called also forced expiratory flow rate.
laminar flow smooth, uninterrupted flow as of a gas through a tube.
maximal expiratory flow FEF200–1200; the rate of airflow at forced vital capacity, represented graphically as the slope of the line connecting the points 200 mL and 1200 mL on the forced expiratory volume curve. See also pulmonary function tests. Called also maximal expiratory flow rate.
maximal midexpiratory flow FEF25–75; the maximum rate of airflow measured between expired volumes of 25 and 75 per cent of the vital capacity during a forced expiration; represented graphically as the slope of the line connecting the points on the forced expiratory volume curve at 25 and 75 per cent of the forced vital capacity. See also pulmonary function tests. Called also maximal midexpiratory flow rate.
renal plasma flow (RPF) the amount of plasma that perfuses the kidneys per unit time, approximately 90 per cent of the total constitutes the effective renal plasma flow, the portion that perfuses functional renal tissue such as the glomeruli.
turbulent flow flow that is agitated or haphazard.

FEF

Abbreviation for forced expiratory flow.

FEF

Abbreviation for forced expiratory flow.
References in periodicals archive ?
'We support further the retention of the 40 percent optional standard deduction, rather than a reduction to 20 percent, in line with the principle of making tax compliance easy and simple,' the FEF said.
Moving closer to the bicameral meetings that would determine the final version of the first package of the tax program, FEF urged lawmakers to 'give the country a fighting chance to fund and implement key programs while still staying within a manageable deficit level of not more than 3 percent of the GDP (gross domestic product).'
FEF agreed that the entire package could help raise the additional P1 trillion needed annually to fund investments in infrastructure, education, health, social protection, training, and research and development.
Il s'agira egalement de passer en revue les statuts des membres de la FEF et veiller a leur alignement sur les nouveaux Statuts de la FEF, ainsi que sur les Statuts et les exigences de la FIFA et veiller a ce que ces statuts soient adoptes par les membres concernes.
The escalating US-China trade war, the FEF said, was an opportunity for the Philippines to lure companies that might decide to relocate out of China to avoid punitive tariffs on its exports to the United States.
FEF said the Philippines could become an alternative destination for thousands of companies seeking to avoid the US-China trade war because of its highly-skilled and English-speaking workforce.
FEF said the restrictions prohibit land owners from selling and mortgaging their land within the first five years of the patent grants and gives original landowners the option to buy back the property within five years from the date of sale.
The Fellows Meeting on BARMM was organized by FEF in partnership with PCID.
Mr Zahid said FEF had issued issue show-cause notices to five teachers for raising the salary issue.
According to details, some eight months ago FEF initiated a project in district Khyber and opened 26 community schools contain on 110 students, however the Surkas girl school was shut down because lack of without facilities in the school.
(3) showed that 1-[FEV.sub.3]/FVC may be used for the evaluation of small airways, may be an indicator of the distal expiratory obstruction and was more sensitive than forced expiratory flow [(FEF).sup.25-75] % in evaluating small airways (3).