The peak expiratory flow (PEF), also called peak expiratory flow rate (PEFR) and peak flow measurement,[1] is a person's maximum speed of expiration, as measured with a peak flow meter, a small, hand-held device used to monitor a person's ability to breathe out air. It measures the airflow through the bronchi and thus the degree of obstruction in the airways. Peak expiratory flow is typically measured in units of liters per minute (L/min).
The peakexpiratoryflow (PEF), also called peakexpiratoryflow rate (PEFR) and peakflow measurement, is a person's maximum speed of expiration, as measured...
MMEF or MEF stands for maximal (mid-)expiratoryflow and is the peak of expiratoryflow as taken from the flow-volume curve and measured in liters per...
also causes a decreased total lung capacity (TLC) by 5% and decreased expiratory reserve volume by 20%. Tidal volume increases by 30–40%, from 0.5 to 0...
according to the frequency of symptoms, forced expiratory volume in one second (FEV1), and peakexpiratoryflow rate. It may also be classified as atopic or...
pulmonary function testing which shows a characteristic reduction in peakexpiratoryflow (PEF), physical examination, and imaging such as computed tomography...
on the stability of the patient's maximum speed of expiration, or peakexpiratoryflow rate (PEFR). Type 1 is characterized by a maintained wide PEF variability...
can be viewed as a unit of volume, it is usually treated in practice as a flow rate (given that it represents a volume change over time). Typical units...
Hwan; Ju, Young-Su (2005). "Effects of ambient particulate matter on peakexpiratoryflow rates and respiratory symptoms of asthmatics during Asian dust periods...
the alveoli, as well as damage to the capillary bed. Testing the peakexpiratoryflow (the maximum speed of expiration), commonly used in asthma diagnosis...
presence of expiratory phase wheezing signifies that the patient's peakexpiratoryflow rate is less than 50% of normal. Wheezing heard in the inspiratory...
and Japan focused on respiratory function performance by measuring peakexpiratoryflow. These studies found that individuals with respiratory diseases such...
the point of measurement.) PEF Peak expiratoryflow: The highest forced expiratoryflow measured with a peakflow meter MVV Maximal voluntary ventilation:...
The peakexpiratoryflow can be measured at the bedside; in acute severe asthma, the flow is less than 50% of a person's normal or predicted flow. Very...
stand for the following abbreviations: Palestine Exploration Fund Peakexpiratoryflow PEF Private University of Management Vienna Pentax raw file (see...
help diagnose asthma. A peakflow meter is a hand-held device which measures how fast a person can exhale – peakexpiratoryflow rate (PEFR) – and is a...
Microsoft Maximum Elevation Figure (flying) Maximal expiratoryflow, another name for peakexpiratoryflow in spirometry Medial eye fields Metro Ethernet Forum...
JR (1993). "Mechanical insufflation-exsufflation. Comparison of peakexpiratoryflows with manually assisted and unassisted coughing techniques". Chest...
menstrual cycles along with asthma symptoms experienced, and the peakexpiratoryflow rate (PMA may cause the PEF to be lowered in the premenstrual period)...
positive flow to the start of negative flow. Expiratory time is defined as the period from the start of expiratoryflow to the start of inspiratory flow. The...
COPD, all of which are contraindications for diving. Sometimes only peakexpiratoryflow (PEF) is measured, which uses a much simpler apparatus, but is still...
VT = tidal volume; PIP = Peak inspiratory pressure (the maximum pressure during inspiration); PEEP = Positive End Expiratory Pressure: Alterations in...
inspiratory and expiratory resistance. There are several equations aimed at determining the real mean airway pressure. In ventilation with a square flow waveform...
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