Volumetric capnography versus spirometry for the evaluation of pulmonary function in cystic fibrosis and allergic asthma

Author(s)

Almeida-Junior, Armando ; Lima Marson, Fernando Augusto ; Bresciani Almeida, Celize Cruz ; Goncalves Oliveira Ribeiro, Maria Angela ; Paschoal, Ilma Aparecida ; Moreira, Marcos Mello ; Ribeiro, Jose Dirceu

• Document type: Journal article
• Source: Jornal de Pediatria; v. 96, n. 2, p. 10-pg., 2020-03-01.

Abstract

Objective: To compare the values of the markers for volumetric capnography and spirometry and their ability to classify children and adolescents with asthma, cystic fibrosis (CF), and healthy controls. Methods: This was a cross-sectional study that included 103 patients with controlled persistent allergic asthma, 53 with CF and a healthy control group with 40 volunteers (aged 6 to 15 years), of both sexes. The individuals underwent volumetric capnography and spirometry. Results: Phase III slope (SIII), Sill standardized by exhaled tidal volume (SIII/TV) and capno-graphic index (SIII/SII) x 100 (KPIv) were different among the three groups assessed, with highest values for CF. The relation between the forced expiratory volume in one second and the forced vital capacity (FEV1/FVC) was the only spirometric marker that presented difference on the three groups. On individuals with normal spirometry, KPIv and FEV1/FVC were different among the three groups. The ROC curve identified the individuals with asthma or CF from the control group, both through volumetric capnography (better to identify CF in relation to the control using KPIv) and through spirometry (better to identify asthma in relation to the control). KPIv was the best parameter to distinguish asthma from CF, even in individuals with normal spirometry. Conclusion: Volumetric capnography and spirometry identified different alterations in lung function on asthma, CF, and healthy controls, allowing the three groups to be distinguished. (C) 2018 Sociedade Brasileira de Pediatria. Published by Elsevier Editora Ltda. (AU)

• FAPESP's process: 15/12858-5 - Identification of prevalent mutations and clinical and functional characterization of children and adults with primary ciliary dyskinesia
• Grantee: Fernando Augusto de Lima Marson
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 11/18845-1 - Association between polymorphisms in modifier genes in children and adolescent with allergic and non-allergic mild, moderate and severe asthma
• Grantee: Jose Dirceu Ribeiro
• Support Opportunities: Regular Research Grants
• FAPESP's process: 15/12183-8 - Identification of prevalent mutations and clinical and functional characterization of children and adults with primary ciliary dyskinesia
• Grantee: Jose Dirceu Ribeiro
• Support Opportunities: Regular Research Grants
• FAPESP's process: 11/12939-4 - Association between polymorphisms in modifier genes in children and adolescent with allergic and non-allergic: mild, moderate and severe asthma
• Grantee: Fernando Augusto de Lima Marson
• Support Opportunities: Scholarships in Brazil - Doctorate