Related Experiment Video

Updated: Oct 5, 2026

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber
08:47

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber

Published on: March 3, 2023

Can peak expiratory flow measurements estimate small airway function in asthmatic children?

S Goldberg1, C Springer, A Avital

  • 1Institute of Pulmonology, Hadassah University Hospital, Hebrew University-Hadassah Medical School, Jerusalem, Israel.

Chest
|August 15, 2001
PubMed

Insights

Peak expiratory flow (PEF) is a useful asthma management tool but has low sensitivity for detecting small airways dysfunction. Multiple PEF measurements improve its correlation with forced expired flow at 50% of vital capacity (FEF(50)) in children with asthma.

Area of Science:

  • Pediatric Pulmonology
  • Respiratory Physiology
  • Asthma Management

Background:

  • Asthma management guidelines recommend peak expiratory flow (PEF) measurements.
  • Small airways dysfunction is a key feature of asthma.
  • PEF correlates with FEV(1) but not consistently with FEF(50).

Purpose of the Study:

  • To assess the utility of PEF as a predictor of small airways status.
  • To evaluate PEF's correlation with forced expired flow at 50% of vital capacity (FEF(50)).

Main Methods:

  • Analysis of PEF and FEF(50) association in 111 asthmatic children.
  • Children were categorized based on FEV(1) values.
  • Single and multiple PEF measurements were analyzed.

Main Results:

  • A significant overall correlation was found between PEF and FEF(50) (r = 0.49).
  • However, 41.6% of patients showed >20% discrepancy between actual and calculated FEF(50).
  • PEF demonstrated high specificity but low sensitivity for detecting FEF(50) status, performing better in severe asthma cases and with multiple measurements.

Conclusions:

  • PEF is valuable but insufficient for a complete assessment of small airways function due to low sensitivity.
  • PEF is best used at home alongside regular clinic spirometry.
  • Individual regression analysis of PEF may enhance its role in monitoring small airways changes.
Abstract

More Related Videos

Murine Model of Allergen Induced Asthma08:05

Murine Model of Allergen Induced Asthma

Published on: May 14, 2012

Related Concept Videos

Respiratory Volumes01:15

Respiratory Volumes

Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
Pulmonary Function Tests01:25

Pulmonary Function Tests

Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
Asthma-IV: Diagnostic and Management01:30

Asthma-IV: Diagnostic and Management

The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
Clinical Assessment for Asthma:
This is the first step in diagnosing and managing asthma. It includes:
Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies

Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
Medical History
Asthma III: Clinical Manifestations01:13

Asthma III: Clinical Manifestations

Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...
Physical Assessment of the Respiratory Tract II: Inspection01:27

Physical Assessment of the Respiratory Tract II: Inspection

Physical assessment of the respiratory tract through inspection is a crucial step in understanding the patient's respiratory health. It provides insights into the functioning of the respiratory system, the musculoskeletal structure, and even the patient's nutritional status. This comprehensive approach involves observing several vital aspects: chest configuration, breathing patterns, respiratory rates, skin color, and use of accessory muscles.
Chest Configuration
The chest configuration can...