Method for lung inflation determining in asthma patients with osmotic airway hyperresponsiveness

Aim. To develop a method for determining the lung inflation by the indexes of forced expiratory flow­volume spirometry.Materials and methods. In 43 patients with mild persistent uncontrolled asthma in combination with osmotic airway hyperresponsiveness, the lung function indexes were assessed by spirometry using a bronchodilation test and bodyplethysmography.Results. From the entire set of parameters, using regression analysis, two equations were con­structed, with the inclusion of the main spirometric indicators (FEV1 in % of the due value, AFEVt and AFEF75 after the bronchodilation test, in %). The equations obtained make it possible to calculate lung inflation indices in asthma patients with osmotic airway hyperresponsiveness to select patients for referral for bodyplethysmography and multispiral computed tomography of the lungs in order to diagnose the severity of hyperinflation.Conclusion. The developed regression models provide an opportunity for a preliminary assessment of the presence and degree of lung hyperinflation in asthma patients with osmotic airway hyperresponsiveness, to determine personal approaches to basic anti-inflammatory therapy and, if necessary, to correct it in a timely manner.