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Obstructive Lung Diseases: Airways 1 |

Role of Lung Volumes, Airway Resistance and Diffusion in Differentiating Asthma With Incomplete Reversibility (AIR) From COPD

Isha Garg, MD; K C Agarwal, MD; Gopal Purohit, MD; C R Choudhary, MD; Srikant Agarwal, MD
Author and Funding Information

Dr S.N. Medical College, Panipat, India


Copyright 2016, American College of Chest Physicians. All Rights Reserved.


Chest. 2016;150(4_S):830A. doi:10.1016/j.chest.2016.08.930
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Extract

SESSION TITLE: Airways 1

SESSION TYPE: Original Investigation Poster

PRESENTED ON: Wednesday, October 26, 2016 at 01:30 PM - 02:30 PM

PURPOSE: To explore various pulmonary function parameters that can help to differentiate AIR from COPD patients with similar degree of obstruction.

METHODS: Total 101 patients, 51 Asthma (35 Males & 16 Females) and 50 COPD (48 Males & 2 Females) already on treatment, subjected to extensive lung function tests including pre and post bronchodilator spirometry, Body plethysmography and Diffusion capacity with carbon monoxide(DLCO).They were stratified into 4 groups according to severity of obstruction (FEV1%) ie. ≥ 80%, 51-79%, 31-50% and ≤ 30%.Both the groups were compared for FRC% (Functional Residual Capacity), TLC% (Total Lung Capacity), RV% (Residual Volume), RV/TLC%, Raw (airway resistance), sGaw (specific airway conductance) with postbronchodilator reversibility and DLCO% using independent t-test. Correlation of FEV1% with other parameters was done using Pearson analysis.

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