Understanding the Impact of Fluid Restriction on Growth Outcomes in Infants Following Cardiac Surgery

Patterns of Growth and Nutrition From Birth to 6 Months in Infants With Complex Congenital Cardiac Defects

BACKGROUND

Infants with complex congenital heart defects (CCHDs) experience alterations in growth that develop following surgical intervention and persist throughout early infancy, but the roles of nutritional intake and method of feeding require further exploration as their roles are not fully explained.

OBJECTIVES

The purpose of this study was to characterize trends in growth and nutritional intake during the first 6 months of life in infants with CCHD.

METHODS

We conducted a secondary analysis of growth and nutritional data from a pilot study designed to test the feasibility of nurse-guided participatory intervention with parents of infants with CCHD. Measures included demographic data, anthropometric data at birth, hospital discharge, and 6 months of age, nutritional intake at 2 and 6 months of age from parent-completed 24-hour nutrition diaries, and assessment of oral-motor skills between 1 and 2 months of age. Descriptive statistics and correlation and group differences were examined.

RESULTS

Data for 28 infants were analyzed. Infants demonstrated a decrease in weight-for-age z score (WAZ) and length-for-age z score (LAZ) from birth to hospital discharge and an increase in WAZ and LAZ by 6 months of age. Many of the infants developed failure to thrive. Across the study period, one third of the infants were receiving enteral nutrition. Infants who were orally fed had better growth WAZ and LAZ at 6 months of age when compared to infants who were enterally fed.

DISCUSSION

Infants with CCHD exhibit growth faltering throughout early infancy. Reliance on enteral nutrition did not improve growth outcomes in these infants. Findings suggest nutritional intake may not be enough to meet the nutrient requirements to stimulate catch-up growth.