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Improved fluid management utilizing humidified incubators in extremely low birth weight infants
M S Gaylord1, K Wright, K Lorch
1University of Tennessee Graduate School of Medicine, Knoxville, TN, USA.
Insights
Extremely low birth weight (ELBW) infants in humidified incubators required less fluid and had better electrolyte balance. Humidified incubators improved fluid and electrolyte management in ELBW infants.
Area of Science:
- Neonatalogy
- Pediatric Intensive Care
- Fluid and Electrolyte Management
Background:
- Extremely low birth weight (ELBW) infants (<1000g) require meticulous fluid and electrolyte management.
- Incubator environment may significantly impact fluid balance and metabolic stability.
- Previous research has not comprehensively compared humidified versus nonhumidified incubators in ELBW infants.
Purpose of the Study:
- To compare fluid and electrolyte management in extremely low birth weight (ELBW) infants nursed in humidified versus nonhumidified incubators.
- To assess the impact of incubator humidity on fluid intake, urine output, and serum electrolytes in ELBW infants.
Main Methods:
- Retrospective cohort study of 155 ELBW infants (<1000g) admitted to a tertiary intensive care nursery.
- Comparison of daily weights, fluid intake, urine output, and serum electrolytes over the first 4 days of life.
- Infants were divided into two groups: nonhumidified incubators (n=70) and humidified incubators (n=85).
Main Results:
- Infants in humidified incubators had lower fluid requirements and higher urine outputs compared to those in nonhumidified incubators.
- Humidified incubator use was associated with a reduced incidence of hypernatremia, hyperkalemia, and azotemia.
- No significant differences in mortality, patent ductus arteriosus, bronchopulmonary dysplasia, or overall nosocomial infections were observed.
Conclusions:
- Humidified incubators optimize fluid and electrolyte management in ELBW infants during the initial postnatal period.
- The use of humidified incubators is recommended for improving fluid balance and metabolic stability in ELBW neonates.
- Further research may explore the impact of humidified incubators on long-term outcomes and infection profiles.
Objective:
To compare fluid and electrolyte management in extremely low birth weight (ELBW) infants nursed in humidified versus nonhumidified incubators.
Study Design:
Setting--tertiary intensive care nursery. Subjects--all infants with birth weight < 1000 g admitted 1/95 to 1/99 who were treated with incubators and survived for > 96 hours (N = 155). Intervention--retrospective comparison of daily weights, fluid intakes, urine outputs, and serum electrolytes between group 1 (n = 70, nonhumidified incubators, born 1/95 to 1/97) and group 2 (n = 85, humidified incubators, born 1/97 to 1/99) over the first 4 days after birth.
Results:
Despite similar daily weight losses between groups, group 1 infants received higher fluid intakes, had lower urine outputs, and had a higher incidence of hypernatremia, hyperkalemia, and azotemia (p < 0.05). Although no differences in mortality or the incidence of patent ductus arteriosus, bronchopulmonary dysplasia, or the overall rate of nosocomial infections were observed, the proportion of gram-negative isolates increased significantly (62%, p < 0.05) following the introduction of humidified incubators.
Conclusions:
ELBW weight infants nursed in humidified incubators have lower fluid requirements, improved electrolyte balance, and higher urine outputs during the first 4 days after birth compared to those nursed in nonhumidified incubators.
