Functional capacity after pediatric liver transplantation: a pilot study

Area of Science:

• Pediatric Gastroenterology
• Transplant Medicine
• Pulmonary Function Testing

Background:

• Liver transplantation in children can impact physical function.
• Assessing functional capacity post-transplant is crucial for recovery and rehabilitation.
• The 6-minute walk test (6MWT) is a common measure of exercise capacity.

Purpose of the Study:

• To evaluate 6-minute walk test (6MWT) performance in pediatric liver transplant recipients.
• To compare their 6MWT results with normative data from healthy children.
• To assess the reproducibility of the 6MWT in this population and analyze factors influencing performance.

Main Methods:

• Prospective cross-sectional study design.
• Inclusion of pediatric liver transplant recipients (ages 6-17) and healthy controls.
• Analysis of 6-minute walk test (6MWT) distance, 6-minute walk work (6MWw), anthropometric data, clinical status, and pulmonary function tests.

Main Results:

• Pediatric liver transplant recipients demonstrated significantly shorter walked distances in the 6MWT compared to healthy controls (511 ± 72 m vs. 687 ± 80 m).
• The 6MWT showed good reproducibility in the study population (ICC coefficient).
• 6-minute walk work (6MWw) correlated significantly with age, weight, height, BMI, FVC, PEF, and VE, with these factors explaining 80% of the variance.

Conclusions:

• Pediatric liver transplant recipients exhibit diminished functional capacity as measured by the 6MWT.
• The 6-minute walk work (6MWw) is a valuable metric, providing additional information on functional capacity beyond just distance.
• These findings highlight the need for tailored rehabilitation strategies focusing on improving exercise tolerance in pediatric liver transplant patients.