منابع مشابه
Spirometry: Quantification of the Shape of the Maximal Expiratory Flow-volume Curve
The relationship between Forced Expiratory Volume in one second (FEV1) and the Forced Vital Capacity (FVC) is intensively used in diagnosing because of its quantitative description with the index FEV1/FVC. There is not such index for the relationship between airflows (Peak Expiratory Flow (PEF) and Maximal Expiratory Flow at xx% of FVC (MEFxx, where xx=75, 50, 25%)). Our aim was to describe tha...
متن کاملSpirometry versus flow volume inspiratory and expiratory loop.
P SPIROMETRY VERSUS FLOW VOLUME INSPIRATORY AND EXPIRATORY LOOP To the Editor: I would like to comment on the excellent CME article, “Vocal Cord Dysfunction: An Update” by Leslie M. Gimenez, MD, and Heidi Zafra, MD (Ann Allergy Asthma Immunol. 2011;106:267–275). I compliment the authors on the very thorough review and analysis of the literature. I am concerned by the nomenclature they used in d...
متن کاملFlow-volume curve abnormalities and obstructive sleep apnea syndrome.
Recent reports have suggested that flow volume curve abnormalities may be of interest in the diagnosis of obstructive sleep apnea syndromes by showing either extrathoracic airway obstruction (ratio of expiratory flow to inspiratory flow at 50 percent of forced vital capacity [FEF50/FIF50] exceeding 1) or upper airway fluttering (indicated by a sawtooth aspect on the mid-half of the inspiratory ...
متن کاملDyspnoea and flow-volume curve during exercise in COPD patients.
The purpose of this study, in patients with chronic obstructive pulmonary disease (COPD), was to examine the relationship of dyspnoea, rated on a visual analogue scale (VAS), to 1) tidal ventilatory variables measured on exercise and 2) pre-exercise lung function. Twenty one patients (forced expiratory volume in one second (FEV1) mean (SD) 1.19 (0.32) l) were studied. During a preliminary test,...
متن کاملIntrasubject variability of maximal expiratory flow volume curve.
Analysis of airflow in the terminal portion of the maximal expiratory flow volume curve has been suggested as a useful test for the early diagnosis of chronic airways obstruction. Whether such an analysis can identify early disease, and whether any subsequent action can prevent the progress of chronic airways obstruction, is unknown and will require prospective studies. As a precursor of such a...
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ژورنال
عنوان ژورنال: Toraks Cerrahisi Bulteni
سال: 2017
ISSN: 2146-3050
DOI: 10.5578/tcb.2017.002