On the causes of lung hyperinflation during bronchoconstriction
نویسندگان
چکیده
منابع مشابه
On the causes of lung hyperinflation during bronchoconstriction.
Airway obstruction in asthma and chronic obstructive pulmonary disease (COPD) is often associated with lung hyperinflation. In this review, we examine the mechanisms that may cause functional residual capacity (FRC), residual volume (RV) and total lung capacity (TLC) to increase during acute and chronic airway obstruction. Normally, FRC at rest is determined by the static characteristics of the...
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in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.
Lung hyperinflation, perception of bronchoconstriction and airway hyperresponsiveness.
PURPOSE To compare the influence of underlying airway inflammation and lung hyperinflation on dyspnea during induced bronchoconstriction in subjects with mild asthma (or asymptomatic airway hyperresponsiveness (AAHR). METHODS Fourteen mild asthmatic and 14 AAHR subjects had methacholine and 5'-adenosine monophosphate (AMP) challenges, and induced sputum analysis. Changes in inspiratory capaci...
متن کاملDynamic hyperinflation during bronchoconstriction in asthma: implications for symptom perception.
OBJECTIVE The objective of this study was to examine the relationship between respiratory symptom intensity and quality and dynamic lung hyperinflation (DH) during induced bronchoconstriction in asthma. PATIENTS AND METHODS Subjects with asthma (n = 116) underwent baseline spirometry and lung volume measurement followed by high-dose methacholine challenge testing (MCT) [maximum decrease in FE...
متن کاملMechanical properties of lung parenchyma during bronchoconstriction.
Interdependence between airways and the lung parenchyma is thought to be a major mechanism preventing excessive airway narrowing during bronchoconstriction. Because the elastance of the lung increases during bronchoconstriction, the lung's tethering force could also increase, further attenuating bronchoconstriction. We hypothesized that the bulk (kappa) and shear moduli (mu) of the lung increas...
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ژورنال
عنوان ژورنال: European Respiratory Journal
سال: 1997
ISSN: 0000-0000,0903-1936
DOI: 10.1183/09031936.97.10020468