Purpose: Chronic kidney disease (CKD) affects pulmonary and cardiovascular systems. This study evaluates functional and pulmonary capacity in pediatric patients with CKD stages 1 to 5.

Methods: Medical records of 30 pediatric CKD patients (stages 1-5) from December 2019 to February 2021 were analyzed. Functional capacity was assessed with the 6-minute walk test and spirometry measured pulmonary function. Data on body mass index z scores, height z scores, and CKD etiology (congenital anomalies of the kidney and urinary tract, glomerulonephritis, or others) were included. Correlation and regression analyses evaluated relationships between CKD severity, pulmonary function, and functional capacity.

Results: Functional capacity worsened with CKD progression, with stage 5 patients showing the lowest 6-minute walk test distances (384 [71] m). Pulmonary function tests revealed lower forced expiratory volume in 1 second and peak expiratory flow values compared with healthy peers (P = .04, P < .001). Restrictive patterns were observed in early CKD, with obstructive changes in advanced stages. Positive correlations were noted between 6-minute walk test and forced expiratory volume in 1 second (r = .42) and peak expiratory flow (r = .48). Height z score emerged as an independent predictor of pulmonary outcomes.

Conclusions: CKD progressively impairs functional and pulmonary capacity in children, especially in advanced stages. These findings underline the importance of comprehensive care focusing on physical and respiratory health. Prospective studies are needed to validate these results and develop targeted interventions.

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http://dx.doi.org/10.1123/pes.2024-0128DOI Listing

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