Related Experiment Videos
Effects of pseudomonas aeruginosa colonization on lung function and anthropometric variables in children with cystic
A Pamukcu1, A Bush, R Buchdahl
1Department of Paediatric Respiratory Medicine, Royal Brompton National Heart and Lung Hospital, London, England.
Insights
Children with cystic fibrosis (CF) colonized with Pseudomonas aeruginosa (Pa) experience faster lung function decline. Despite optimal management, Pa colonization significantly impacts lung health in pediatric CF patients.
Area of Science:
- Pediatric Pulmonology
- Infectious Diseases in Cystic Fibrosis
- Respiratory Medicine
Background:
- Pseudomonas aeruginosa (Pa) colonization is a significant concern in cystic fibrosis (CF) management.
- Understanding the impact of Pa colonization on lung function and growth is crucial for pediatric CF care.
Purpose of the Study:
- To evaluate longitudinal changes in lung function and growth in children with CF, comparing those colonized with Pa to those without.
- To determine the specific effects of Pa colonization on key respiratory parameters and physical growth metrics over time.
Main Methods:
- Longitudinal study of 192 pediatric patients with CF, with detailed assessments for lung function (FEV1, FEF25, FVC) and growth (height, weight).
- Analysis of data from 62 children with at least three annual lung function assessments and 117 with at least three annual growth assessments.
- Lung function and growth parameters were analyzed as standard deviation scores (SDS) and actual values relative to height and time.
Main Results:
- Children with CF colonized with Pa showed significantly greater decreases in forced expiratory volume in 1 second (FEV1) and forced expiratory flow at 25% of vital capacity (FEF25) compared to non-colonized children.
- While most children grew within normal ranges for height and weight, colonized children exhibited slower growth rates (5.63 cm/yr vs. 6.96 cm/yr) and a decrease in height SDS.
- Despite optimal pulmonary management, lung function in Pa-colonized children deteriorated significantly faster than in their non-colonized counterparts.
Conclusions:
- Pseudomonas aeruginosa colonization is associated with accelerated lung function decline in children with cystic fibrosis.
- Early detection and management strategies are essential to mitigate the long-term respiratory consequences of Pa colonization in pediatric CF patients.
- Further research into targeted therapies is warranted to improve outcomes for CF patients colonized with Pa.
Abstract:
The aim of this study was to evaluate how lung function and growth changed over time in children with cystic fibrosis (CF) colonized with pseudomonas aeruginosa (Pa) compared with those free of the organism. A total of 192 children attended our cystic fibrosis clinic between 1982 and 1992. Sixty-two of these had three or more annual assessments for lung function, and 117 had three or more annual assessments for height and weight. When lung function was expressed as a standard deviation score (SDS), forced expiratory volume in 1 second (FEV1) and forced expiratory flow at 25% of vital capacity (FEF25) decreased significantly more with respect to height in colonized compared with noncolonized children: FEV1, -0.052 verses -0.015 SDS/cm (P < 0.05); FEF25, -0.060 verses -0.007 SDS/cm (P < 0.05); forced vital capacity (FVC), -0.034 versus -0.012 (NS). In actual values those patients colonized with Pa increased their FEV1 by 16.4 versus 31.6 mL/cm (P < 0.01); FVC by 28.8 versus 41.4 mL/cm, P < 0.01; and FEF25 by -0.001 versus 0.015 L/s/cm, P < 0.01. In terms of height, colonized children grew at 5.63 versus 6.96 cm/yr, P < 0.001, and height SDS decreased in colonized compared with noncolonized children at -0.031 verses 0.08 SDS/yr, P < 0.05. Clinically, most children with CF, with or without Pa, grew within +/- 1 SD of the norm for weight and height. However, in terms of lung function despite optimum pulmonary management colonized children deteriorated significantly faster.