Search results
Results from the WOW.Com Content Network
The flow-volume loop is a plot of inspiratory and expiratory flow (on the Y-axis) against volume (on the X-axis) during the performance of maximally forced inspiratory and expiratory maneuvers. Changes in the contour of the loop can aid in the diagnosis and localization of airway obstruction [ 1 ].
Flow-volume loops in upper airway obstruction The configuration of the flow-volume loop can help distinguish the site of airway narrowing. The airways are divided into intrathoracic and extrathoracic components by the thoracic inlet.
最容易进行和最有用的肺功能测定是肺量计检查，包括测定第1秒用力呼气容积(forced expiratory volume in one second, FEV 1)和用力肺活量(forced vital capacity, FVC)。流量-容积环是在进行最大用力吸气和呼气动作期间，吸气和呼气流速(Y轴)对容积(X轴)的描记图。
STUDY OBJECTIVES To study the incidence of upper airway obstruction, as measured on the flow volume loop (FVL), in patients with bulky mediastinal Hodgkin's disease; to correlate the FVL with CT of the chest; and to follow the changes in the FVL after treatment of the tumor.
- Flow-volume loops - FV curves after treatment - Lung volume and capacities - Lung volumes by disease state; CALCULATORS. Calculator: PFT predicted values in children and adults (2022, race-neutral GLI equations) RELATED TOPICS. An overview of asthma management in children and adults; Asthma in adolescents and adults: Evaluation and diagnosis
More general issues related to pulmonary function tests, the interpretation of flow volume loops, and the technique of bronchoprovocation testing are discussed separately. (See "Overview of pulmonary function testing in adults" and "Flow-volume loops" and "Bronchoprovocation testing" .)
Flow-volume loops; Inducible laryngeal obstruction (paradoxical vocal fold motion) Overview of pulmonary function testing in adults; Presentation and diagnostic evaluation of non-life-threatening and nonmalignant subglottic and tracheal stenosis in adults; Primary humoral immunodeficiencies: An overview; Tracheomalacia in adults: Treatment and ...
In a review of 2800 flow-volume loops performed in our pulmonary function laboratory, we identified flow oscillations in 40 patients, an incidence of 1.43%. Thirty-one of these 40 patients (77%) did not have OSA.
- Flow-volume loops in airway obstruction - Lung volume and capacities - Sample pulmonary function test report
For example, traditional spirometric parameters such as "distal" airflows do not provide sufficient differentiating capacity, especially for mixed patterns or small airway disease.Objectives: We assessed the utility of an alternative spirometric parameter (area under the expiratory flow-volume curve [AEX]) in differentiating between normal ...