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). Patients and Methods

2020年12月14日 · The forced expiratory flows (FEFs) towards the end of the expiration may be more sensitive in detecting peripheral airways obstruction compared to the forced expiratory volume in 1 s and forced vital capacity (FVC). However, they are highly variable. A partial solution is to adjust the FEFs for FVC (FEF/FVC).

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).

2023年11月13日 · 用力呼气 75% 肺活量(余 25% 肺活量)的瞬间流量(fef 75%)： 正常值约为 mmef 的 1/2，是反映呼气后期的流量指标。 FEF 50% 、FEF 75% 、MMEF 共同评价小气道功能，三者中有 2 个以上指标降低，小于 65％ 预计值，提示小气道阻塞。

2021年6月11日 · 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，后降低，逐渐趋向于 0。 斜率是呼气流量（流速）的反映，对应着呼气流量先增高后降低。 呼气流量的最大值即为呼气峰值流量（PEF），对应曲线上的最大斜率。 常用于哮喘的动态随访。 再换个角度，我们看一下最常 …

2025年1月6日 · Background: Some studies have suggested that the forced expiratory flow between 25 and 75% of vital capacity (FEF 25-75) can be used as an early marker of bronchial hyperresponsiveness (BHR) in asthma and allergic rhinitis (AR), but is highly variable.

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 …

O Laboratório Integrado de Ensino, Pesquisa e Extensão (LABFEF) é um laboratório multiusuário, que atua de maneira integrada com os departamentos da FEF. Possui espaços e equipamentos para realização de atividades acadêmicas de ensino, pesquisa e extensão da FEF e em parceria com outras unidades da Unicamp e IES nacionais ou ...

2020年11月5日 · FeF 2 nanoparticles embedded with graphitic carbon were successfully synthesized using Fe-MIL-88B. The FeF 2 @GC electrode shows improved discharge capacity, stable retention, and high rate performance in SIBs. The phase transformation of FeF 2 to FeF 3 during cycles is an essential factor for the high electrochemical performance.

2023年10月17日 · FeF 3 has a theoretical capacity of 712 mAh/g, which is lower than that of FeS 2, but has an energy density of 1947 Wh/kg, which is higher than that of FeS 2 (1273 Wh/kg) . Additionally, FeF 3 is a candidate as a non-sulfide-based cathode