FEF
2020年11月12日 · Purpose: The forced mid-expiratory flow (FEF 25-75%) value is a potentially sensitive marker of obstructive peripheral airflow. We aimed to assess whether FEF 25-75% can be an early predictor of chronic obstructive pulmonary disease (COPD).
FEF25%-75% Linked to Emphysema and Disease Severity - COPD …
We examined the potential of the maximal mid-expiratory flow rate (forced expiratory flow rate between 25% and 75% [FEF 25%-75%]) as an additional tool for characterizing pathophysiology in COPD. Objective: To determine whether FEF 25%-75% helps predict clinical and radiographic abnormalities in COPD.
FEF50、FEF75、MMEF75/25是什么意思 - 百度知道
FEF是用力呼气流量forced expiratory flow分别取50%,75%肺活量的呼气流速。说明你呼吸功能减弱。 度量标准： 通常 以它所占用用力肺活量的百分比表示。正常时，第一秒用力呼气量（FEV1）约为用力肺活量的83%， 第二秒钟的FEV2/FVC约为96%，第三秒钟的FEV3/FVC约 …
(PDF) Forced Expiratory Flow (FEF25-75%) as a Clinical Endpoint in ...
2020年5月12日 · Forced expiratory flow at 25-75% of the vital capacity (FEF25-75%) is a potentially more sensitive parameter for assessing peripheral airway function. This post...
肺功能报告不会看？手把手教你识别各种参数！ - 丁香园
2021年6月11日 · 这个曲线是为了重点描述一秒量（FEV1）、用力肺活量（FVC）、峰流速（PEF）。 FEV1：上图第一个红点代表深吸气至最大量后用力呼气开始，第二个红点是一秒钟的时候所对应的呼气容积，也就是一秒量（FEV1）。 FEV1 在肺功能测试中重复性最好、用于舒张和激发试验，也是判断损害程度的最常用参数。 FVC：当用力呼气达到平台时（红色曲线），达到吹气容积最大量，即用力肺活量（FVC）。 PEF：在这个过程中，曲线的斜率先增加，后降 …
Forced Expiratory Flow (FEF - Springer
2020年5月12日 · Forced expiratory flow at 25–75% of the vital capacity (FEF 25–75%) is a potentially more sensitive parameter for assessing peripheral airway function. This post hoc analysis compared FEF 25–75% with FEV 1 as an endpoint to assess bronchodilator responsiveness in children with asthma.
Forced Expiratory Flow - an overview | ScienceDirect Topics
The FEF 25%–75%, or forced expiratory flow between 25% and 75% of FVC, was introduced as the maximal midexpiratory flow rate (Fig. 25-5).
Diagnostic Accuracy of FEF - Springer
2025年1月6日 · Urbankowski T et al. found that the FEF 25-75 is related to the level of airway responsiveness to methacholine in patients with asthma-like symptoms and no airflow limitation in spirometry. In addition, impaired FEF 25-75 could suggest bronchial hyperreactivity in patients with AR and asthma .
FEF
FEF 25-75 % represented small airway function and was more sensitive at reflecting airway hyperresponsiveness, inflammation, and disease severity as compared with FEV 1 % in patients with asthma. Our data suggest further assessment of FEF 25-75 % in asthma management, part …
MEF, FEF, PEF – zkratky viz Přehled parametrů). Měřen je buď objem nebo průtok (objem za časovou jednotku). Měření objemu je vyjadřo váno na křivce objem/čas, měření průtoku je vyjadřováno na křivce (smyčce) průtok/objem ( obr. 1). Objemy jsou již …