[Lung functional testing by electroimpedance spirometry: experimental and clinical study]

Area of Science:

• Respiratory Medicine
• Medical Physics

Background:

• Airway obstruction in asthma is a significant clinical challenge.
• Accurate assessment of airway diameter and obstruction is crucial for effective asthma management.

Purpose of the Study:

• To investigate the relationship between 0.9% sodium chloride saline aerosol properties and airway electrical impedance.
• To evaluate the utility of electrical impedance spirometry in assessing airway obstruction in healthy individuals and asthma patients.

Main Methods:

• Experimental measurements of aerosol particle size and flow dynamics in polyethylene tubes.
• Clinical application of electrical impedance spirometry in children, healthy adults, and bronchial asthma patients.

Main Results:

• A reverse relationship was observed between aerosol particle size, flow intensity, and electrical impedance.
• Electrical impedance spirometry measurements correlated with airway diameter, indicating potential as a bronchial obstruction syndrome criterion.
• Small airway disease was identified as the primary mechanism in controlled asthma, while both small and large airways were implicated in uncontrolled asthma.

Conclusions:

• Electrical impedance spirometry, influenced by saline aerosol, shows promise for diagnosing and characterizing airway obstruction.
• The findings contribute to understanding the pathophysiology of asthma, differentiating between controlled and uncontrolled disease based on airway involvement.