[Perception of dyspnea in asthmatics--long-term study]

Area of Science:

• Pulmonology
• Respiratory Medicine
• Clinical Physiology

Context:

• Bronchial asthma is a chronic respiratory condition characterized by airway inflammation and obstruction.
• Patient-reported perception of dyspnoea (shortness of breath) is a key symptom but may not always correlate with objective measures of airflow limitation.

Purpose:

• To investigate the relationship between subjective dyspnoea perception and objective respiratory parameters, specifically forced vital capacity (FVC) and forced expiratory volume in one second (FEV1), in asthma patients.
• To assess how this relationship changes over time and after bronchodilator administration (Berotec).
• To determine the extent of under- or over-perception of airway obstruction among asthma patients.

Summary:

• A significant proportion of asthma patients exhibit a disconnect between their perceived dyspnoea and measured airway obstruction (FEV1).
• 18.4% of patients did not report dyspnoea despite significant obstruction, while 23.2% reported dyspnoea even with normal FEV1 (>85%).
• Perception of bronchodilator-induced improvement was inadequate in 39.5% of patients, and dyspnoea perception varied considerably during follow-up.

Impact:

• Findings highlight the limitations of relying solely on subjective symptom reporting for asthma management.
• Emphasizes the need for integrating objective monitoring of airway obstruction in home environments into routine clinical practice.
• Suggests personalized treatment strategies considering both patient-reported symptoms and objective lung function data for optimal asthma control.