Expectations Versus Reality in Inhalation Technique-A Case-Control Study of Inhalation Technique in Patients with...

Area of Science:

• Respiratory Medicine
• Clinical Pharmacy
• Patient Education

Background:

• Correct inhalation technique (IT) is vital for managing airway obstructive diseases like asthma and COPD.
• Inhaler misuse is prevalent among patients, compromising treatment efficacy.
• Assessing IT and identifying factors contributing to errors is essential for improving patient outcomes.

Purpose of the Study:

• To evaluate the inhalation technique (IT) in adults with asthma and COPD.
• To identify demographic and clinical factors associated with correct and incorrect inhaler use.
• To determine the impact of prior training on IT among these patient groups.

Main Methods:

• A single-center case-control study involving 180 adult patients with asthma or COPD.
• IT assessed using a checklist, a four-grade scale, and peak inspiratory flow.
• Comparison of patients with correct vs. incorrect IT across various factors including demographics, disease characteristics, cognitive function, and prior training.

Main Results:

• Only 37.8% of patients used their inhalers properly; Metered Dose Inhaler (MDI) users had lower correct IT rates than Dry Powder Inhaler (DPI) users (p < 0.001).
• Correct IT was not associated with age, gender, education, motivation, or cognitive/sensory impairments.
• Among MDI users, correct IT correlated with reading drug leaflets (p = 0.015); among DPI users, it correlated with better self-assessment (p = 0.046) and prior training (p = 0.001).

Conclusions:

• A significant majority of adults with asthma and COPD exhibit improper inhaler technique, with MDI users being particularly affected.
• Inadequate patient education regarding proper IT remains a critical and unresolved issue.
• Targeted educational interventions focusing on IT are necessary to improve inhaler use and disease management.