Thoracic Research and Practice
Original Article

Post-COVID Pulmonary Function Test Evaluation


Department of Chest Diseases, Abant İzzet Baysal University Hospital, Bolu, Turkey


Department of Internal Medicine, Abant İzzet Baysal University Hospital, Bolu, Turkey

Thorac Res Pract 2022; 23: 387-394
DOI: 10.5152/TurkThoracJ.2022.21230
Read: 811 Downloads: 244 Published: 01 November 2022

OBJECTIVE: Since the lung is the most affected organ by COVID-19 disease, we aimed to evaluate the pulmonary function test, presence of hypoxemia, and Post-COVID-19 Functional Status Scale in 3- to 6-month post-COVID period.

MATERIAL AND METHODS: Post-COVID-19 Functional Status Scale, pulse oxygen saturation, and pulmonary function test were evaluated in 67 outpatients/inpatients after 3-6 months following COVID-19 (positive reverse transcription-polymerase chain reaction on nasopharyngeal swab) disease. Pre-COVID pulmonary function test parameters were available in 33 patients, and these were compared with post-COVID pulmonary function test parameters.

RESULTS: We found 20.9% (14 patients) restrictive and 11.9% (8 patients) obstructive patterns in pulmonary function test. Of those with forced vital capacity < 80%, 53.3% were patients without known lung diseases. When pulmonary function test values before and after COVID-19 were compared, only a loss of 130 mL in forced expiratory volume in 1 second was determined (P = .005). About 65.4% of the patients with dyspnea were in the group without a lung disease (P = .002) and 66.7% of patients with forced expiratory volume in 1 second and forced vital capacity of .05). Smoking, hospitalization, oxygen support, and the severity of computed tomography involvement did not impact pulmonary function test.

CONCLUSION: In post-COVID patients, the major disorder in the respiratory function test was determined as a restriction. However, advanced tests such as lung volumes and carbon monoxide diffusing capacity (DLCO) measurement and high-resolution lung tomography are needed to differentiate in terms of physical functional limitation or parenchymal fibrosis.

Cite this article as: Afsin E, Demirkol ME. Post-COVID pulmonary function test evaluation. Turk Thorac J. 2022;23(6):387-394.

EISSN 2979-9139