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3 lut 2022 · PEF variability between 15% to 20% clearly lacks sensitivity to diagnose asthma compared to bronchial challenge and we advocate prospective studies to establish the threshold of variability that best correlates to a positive bronchial challenge test.
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15 mar 2020 · Bronchoprovocation testing may be used if spirometry results are normal and allergen- or exercise-induced asthma is suspected. For patients with an FEV 1 less than 70% of predicted, a...
1 lut 2018 · Spirometry testing plays an important role in the diagnosis and management of Chronic Obstructive Pulmonary Disease (COPD) and asthma [1–3]. In addition, a restrictive spirometry pattern can prompt additional testing (e.g., lung volumes, diffusing capacity) to diagnose restrictive abnormalities like interstitial lung disease [ 4 ].
22 mar 2021 · Overview. This guideline covers diagnosing, monitoring and managing asthma in adults, young people and children. It aims to improve the accuracy of diagnosis, help people to control their asthma and reduce the risk of asthma attacks. It does not cover managing severe asthma or acute asthma attacks.
21 cze 2024 · The definitive diagnosis of asthma requires the history or presence of respiratory symptoms consistent with asthma, combined with the demonstration of variable expiratory airflow obstruction and/or hyperresponsiveness .
3 lut 2022 · by bronchodilator reversibility testing. If initial spirometry fails to show obstruction, further tests should be performed in the following order: FeNO, PEF variability or in secondary care, bronchial challenge. We present the thresholds for each test that are compatible with a diagnosis of asthma in the presence of current symptoms.
In patients with a normal spirometry, variability may also be demonstrated by bronchial provocation testing to assess airway hyper-responsiveness. Most often a challenge with inhaled methacholine is used but an exercise challenge also provides the same information.
