Fluid Management in ELGANs: Striking the Perfect Balance!

Area of Science:

• Neonatalogy
• Pediatric Nephrology
• Critical Care Medicine

Background:

• Extremely low gestational age neonates (ELGANs) present unique fluid and electrolyte management challenges due to immature skin barrier function, leading to significant trans-epidermal fluid loss.
• These neonates exhibit a physiological tendency towards increased diuresis and natriuresis, further complicating fluid balance.
• Initial weight loss of 6-12% is considered physiological and beneficial for extracellular volume management.

Purpose of the Study:

• To outline a protocol-based fluid management strategy for ELGANs, grounded in physiological principles and current evidence.
• To provide specific recommendations for initial fluid intake and titration based on gestational age and clinical monitoring.
• To highlight the potential benefits of restricted fluid intake in reducing the incidence of major neonatal morbidities.

Main Methods:

• Development of a fluid management protocol based on estimated dermal and renal losses, and target weight changes.
• Initiation of total fluids at 100 mL/kg/d for 26-27 week gestation and 110 mL/kg/d for 24-25 week gestation neonates on day 1.
• Subsequent fluid adjustments based on daily monitoring of weight, urine output, and serum sodium, with defined increments and maximum rates.

Main Results:

• Recommended initial fluid rates vary by gestational age, with specific daily increments and maximum fluid rates by day 7.
• Suggests fluid strategy revision every 12 hours in the initial days of life.
• Emphasizes the use of a humidified incubator to minimize trans-epidermal fluid losses.

Conclusions:

• A protocol-driven approach to fluid and electrolyte management is crucial for ELGANs.
• Close monitoring and individualized adjustments are essential for optimizing fluid balance and potentially reducing morbidities like bronchopulmonary dysplasia, PDA, and NEC.
• Continuous auditing of outcomes is advised to refine unit-specific fluid management strategies, acknowledging the limited trial-based evidence.