Fluids%252525252525252525252525252525252525252525252525252525252525252520in%252525252525252525252525252525252525252525252525252525252525252520pediatrics

# Fluids in Pediatrics ## Overview Pediatric intravenous fluid therapy requires a precise balance of maintenance needs (to support physiologic function) and replacement needs (to address deficits or ongoing losses). Isotonic crystalloids (e.g., 0.9% Normal Saline or Balanced Salt Solutions like Lactated Ringer's) are currently preferred over hypotonic solutions to reduce the risk of iatrogenic hyponatremia. ## Primary Indications - Maintenance of hydration in patients unable to meet needs enterally. - Resuscitation of shock/hypovolemia. - Replacement of ongoing losses (e.g., GI losses, third-spacing). - Correction of electrolyte abnormalities. ## Adult Dosing *Not applicable.* Adult fluid management follows different physiologic formulas (e.g., Holliday-Segar is specific to pediatrics; adults follow weight-based hourly rates, typically 1–2 mL/kg/hr). ## Pediatric Dosing *Note: Follow local institutional protocols, as standards vary based on specific subspecialty guidelines (e.g., ED vs. ICU).* **Maintenance (Holliday-Segar Formula):** - 0–10 kg: 100 mL/kg/day - 11–20 kg: 1,000 mL + 50 mL/kg for each kg between 11–20 - >20 kg: 1,500 mL + 20 mL/kg for each kg above 20 - *Maximum:* 2,400 mL/day. **Resuscitation:** - Isotonic crystalloid (0.9% NaCl or LR): 20 mL/kg rapid IV bolus. - May repeat based on hemodynamic response. ## Dose Adjustments - **Reduced Maintenance:** Consider 60–80% of calculated maintenance in patients at risk for Syndrome of Inappropriate Antidiuretic Hormone (SIADH), such as those with CNS infections or post-operative status. - **Renal/Cardiac Impairment:** Reduce volume and adjust electrolytes based on serum potassium and creatinine. - **Dehydration:** Add replacement volume (deficit) to maintenance volume. ## Contraindications - Severe fluid overload (e.g., congestive heart failure, symptomatic pulmonary edema). - Hypotonic solutions (e.g., 0.45% NaCl or D5W) are generally contraindicated for maintenance in pediatric patients due to the high risk of hyponatremic seizures. ## Adverse Effects - **Hyperchloremic Metabolic Acidosis:** Associated with high-volume 0.9% NaCl infusion. - **Fluid Overload:** Edema, hypertension, pulmonary edema. - **Electrolyte Imbalance:** Induced hyponatremia, hypernatremia, or hyperkalemia. ## Key Drug Interactions - **Ceftriaxone:** Do not administer with calcium-containing solutions (e.g., Lactated Ringer's) in neonates (≤28 days) due to the risk of precipitant formation in the lungs and kidneys. ## Monitoring - **Clinical:** Daily weights (most sensitive marker), intake and output (I&O), heart rate, blood pressure, capillary refill time, and neurological status. - **Laboratory:** Serum electrolytes, BUN, creatinine, and glucose at intervals determined by clinical status and stability. ## Clinical Pearls - **Balanced Solutions:** Current consensus favors balanced isotonic solutions (LR or Plasma-Lyte) over 0.9% NaCl for resuscitation to minimize the risk of acid-base disturbances. - **Glucose:** Add dextrose (e.g., D5) to maintenance fluids in neonates and young infants to prevent hypoglycemia. - **Neurological Focus:** Always prioritize isotonic fluids in children with potential increased intracranial pressure. *** *Disclaimer: This information is for educational purposes. Dosing and clinical practices vary by institution. Always verify current prescribing information, institutional guidelines, and pharmacy protocols before ordering or administering intravenous fluids.*