Abstract
Background Obstructive airway diseases, including chronic obstructive pulmonary disease (COPD) and asthma, pose significant global health challenges. Early and accurate diagnosis is crucial for effective management. Although Spirometry has traditionally been the cornerstone of diagnostics, Impulse Oscillometry (IOS) has emerged as a promising alternative. This study aims to compare the diagnostic performance of Spirometry and IOS in patients attending the Respiratory Medicine Department at the Acharya Vinoba Bhave Rural Hospital, Sawangi, India. Methods A Comparative Observational Study was conducted between August 2022 and August 2024, enrolling patients who met specific inclusion criteria. Data were collected through a comprehensive medical history, clinical examination, routine blood tests, chest radiography, High-resolution computed tomography (HRCT), spirometry, and IOS. Key parameters, including Forced expiratory volume in the first second FEV1, FEV1/FVC (Forced Expiratory Volume), (Forced Expiratory Volume) FVC, (Forced Expiratory Flow) FEF 25-75 for Spirometry, and R5, R20, fres, X5, and AX for IOS, were analyzed using the Chi-Square Test and Student’s t-test with SPSS 27.0 and GraphPad Prism 7.0. Expected outcome The study included 130 participants with the primary objective of evaluating IOS’s diagnostic advantages of IOS over spirometry. Our findings demonstrate that IOS offers enhanced sensitivity for diagnosing early small airway diseases, which is a crucial factor for early diagnosis in both pediatric and adult populations.