and inspiratory respiratory variables in all three groups are shown in Table 2.
5] Hence, the present study is taken up to study correlation of BMI and flow rates (forced expiratory
flow 25-75% [FEF 25-75%], FEF 75%, peak expiratory
flow [PEF], and maximal voluntary ventilation [MVV]) of pulmonary function test in controls and patients.
Keywords: Forced expiratory
volume in 1 second, Force vital capacity, Peak expiratory
flow rate, Pulmonary function test, Spirometry.
The ratio of the forced vital capacity (FVC) that is not yet expired within the first 3 seconds of a forced exhalation is expressed with the following formula: 1 minus-forced expiratory
volume in third seconds (1-[FEV.
Flow Rate (PEFR) recorded on Wrights peak flow meter is commonly used for screening individuals with chronic airway obstruction both in clinical and in field studies.
The active use of the expiratory
muscles (as during exercise) can produce auto-PEEP with normal or even subnormal end-expiratory
However, despite the ability to change expiratory
resistance by 1 cm [H.
The forced expiratory
volume is the amount of air expelled in the first second as part of the FVC maneuver after maximal inhalation.
In addition, there was a significantly negative correlation between plasma CTGF levels in patients with asthma and forced vital capacity (FVC), FEV1, percentage of predicted FEV1, FEV1/FVC ratio, forced expiratory
flow at 50% of the FVC (FEF50%), percentage of predicted FEF50%, forced expiratory
flow at 75% of FVC (FEF75%) and percentage of predicted FEF75% parameters, which show the degree of airway obstruction.
In patients with spontaneous respiration, a significant relationship was found between IVC diameters measured by ultrasonography at the end of expiratory
and inspiratory phases and measured CVP values at the same phases (for expiratory
p = 0.
Pressure (PEP) therapy involves the application of a resistance to expiration in order to produce positive airway pressure (Darbee et al 2004).
We measured the Peak Expiratory
Flow Rate ( PEFR), the rate at which a person exhales, to assess lung function.