Nghiên cứu chỉ số sức cản và điện kháng đường thở đo bằng kỹ thuật dao động cưỡng bức ở người Việt Nam bình thường trên 40 tuổi

Abstract

Objective: To determine normal value for respiratory resistance and reactance in subjects > 40 years old and their relationship with some criteria of lung function. Subject and method: The study has been done in 108 Military Central Hospital, among 200 healthy subjects, whose ages > 40 years, nor suffered from infected lung disease. Respiratory resistance (Rrs5 and Rrs20) and reactance (Xrs5) and pulmonary function tests were measured by MostGraph-02 (Chest M.I., Co. Ltd., Japan). Result: Parameters of pulmonary function tests: FVC: 3.02 ± 0.61L, FEV₁: 2.33 ± 0.61L, FEV₁%: 97.0 ± 12.3%, FEV₁/FVC: 107,4 ± 10.51%, PEF: 93.58 ± 13.22%, FEF 25-75%: 86.47 ± 18.26%. Respiratory resistance Rrs5: 0.301 ± 0.051kPa/L/s, Rrs20: 0.256 ± 0.014kPa/L/s, Reactance Xrs5: -0.0945 ± 0.041kPa/L/s. Conclusion: In healthy subjects, whose ages > 40 years, respiratory resistance Rrs5: 0.301 ± 0.051kPa/L/s, Rrs20: 0.256 ± 0.014kPa/L/s, reactance Xrs5: -0.0945 ± 0.041kPa/L/s. There was no correlation between respiratory resistance, reactance with FEV₁%, FEV₁/FVC, FEF 25-75% and PEF.