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Quality of Pulmonary Function Tests in Participants with Down Syndrome
Rosario Fernández-Plata1, Rogelio Pérez-Padilla2, Rodrigo Del Río-Hidalgo3
1Department of Epidemiology and Social Science in Health, National Institute of Respiratory Diseases "Ismael Cosío Villegas", Mexico City, Mexico.
Introduction:
People with Down syndrome (DS) have high respiratory morbidity, evaluating their respiratory health with standardized, objective tests is desirable. Thus, the objective of this study was to evaluate the technical quality of Pulmonary Function Tests (PFTs) to determine which ones are most suitable for this population.
Methods:
Participants included children, teenagers and adults with DS, 5 years of age or older (n=302). The technical quality of the impulse oscillometry system (IOS), forced spirometry, lung-diffusing capacity for carbon monoxide (DLCO), and 6-min walk test (6MWT) were analyzed by age group. Capnography and pulse oximetry were included in the study. Technical quality was determined on the basis of current international PFTs standards.
Results:
Fifty-one percent of participants were males. A total of 184 participants (71%) who completed the IOS fulfilled the quality criteria, while 210 (70%) completed the 6MWT. Performance on forced spirometry and DLCO was poor. All pulse oximetries and 96% percent heart rates obtained had good quality, but exhaled carbon dioxide (PetCO2) and respiratory rate (RR) showed deficient repeatability.
Conclusions:
IOS appears to be the most reliable instrument for evaluating lung mechanics in individuals with DS.
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