Please check your internet connection and try again.
# Fluids in Pediatrics
## Overview
Pediatric intravenous fluid therapy requires a balance between electrolyte maintenance, replacement of deficits, and ongoing losses. The standard approach utilizes isotonic crystalloids (e.g., 0.9% NaCl, Balanced Salt Solutions) for resuscitation and appropriately hypotonic or isotonic solutions for maintenance, depending on age and clinical status.
## Primary Indications
* **Resuscitation:** Hypovolemic or distributive shock.
* **Maintenance:** Meeting basal metabolic water and electrolyte requirements when enteral intake is insufficient.
* **Replacement:** Correcting acute deficits (dehydration) or ongoing losses (gastrointestinal, renal).
## Adult Dosing
Standard maintenance calculations (Holliday-Segar) are generally scaled down to pediatric needs. Adults typically require 25-35 mL/kg/day.
## Pediatric Dosing
**Maintenance (Holliday-Segar Method):**
* **0–10 kg:** 100 mL/kg/day.
* **11–20 kg:** 1,000 mL + 50 mL/kg for each kg over 10 kg.
* **>20 kg:** 1,500 mL + 20 mL/kg for each kg over 20 kg (Max 2,400 mL/day).
* *Note:* Infants <10 kg often require maintenance fluids with Dextrose to prevent hypoglycemia. Standard maintenance often includes 0.45% NaCl with 20 mEq/L KCl if renal function is established.
**Resuscitation:**
* **Bolus:** 20 mL/kg of Isotonic Crystalloid (e.g., 0.9% NaCl or Lactated Ringer’s) IV/IO push, repeated as needed based on clinical assessment. *Note:* In DKA, initial boluses for shock may be limited to 10 mL/kg to reduce cerebral edema risk.
## Dose Adjustments
* **Renal/Cardiac Impairment:** Reduce maintenance rates and monitor for volume overload (pulmonary edema, peripheral edema).
* **Hypernatremia:** Requires slower correction rates (e.g., 0.5–1 mEq/L/hour) to prevent cerebral edema.
* **Syndrome of Inappropriate Antidiuretic Hormone (SIADH):** Fluid restriction is primary management.
## Contraindications
* **Pulmonary Edema:** Contraindicates aggressive fluid resuscitation.
* **Severe Hyponatremia (if neurological symptoms):** Requires hypertonic saline (3% NaCl) rather than standard maintenance fluids.
* **Oliguric Renal Failure:** Caution required; requires careful calculation of "insensible losses" plus urine output.
## Adverse Effects
* **Hyperchloremic Metabolic Acidosis:** Commonly associated with excessive 0.9% NaCl use.
* **Fluid Overload:** Congestive heart failure, pulmonary edema, hypertension.
* **Electrolyte Imbalances:** Hyponatremia (iatrogenic due to hypotonic fluids), hypernatremia, hypokalemia, hyperkalemia.
## Key Drug Interactions
* **Incompatibility:** IV fluids are carriers for medications. Always verify Y-site compatibility (e.g., do not mix Calcium-containing solutions with Ceftriaxone or phosphate-containing solutions due to precipitation risk).
## Monitoring
* **Physical Exam:** Weight (daily), peripheral perfusion, capillary refill, mucous membranes, mental status, lung sounds.
* **Labs:** Serum electrolytes (Na, K, Cl, Bicarbonate), glucose, BUN/Creatinine.
* **Input/Output:** Accurate hourly monitoring of urine output (Goal: 1 mL/kg/hour in infants, 0.5 mL/kg/hour in children).
## Clinical Pearls
* **Isotonic Shift:** Current trends favor balanced solutions (Lactated Ringer’s or Plasma-Lyte) over 0.9% NaCl for maintenance and resuscitation to decrease the incidence of iatrogenic hyperchloremic metabolic acidosis.
* **Dextrose:** Always consider the need for Dextrose (D5W) in small infants or those failing to thrive to prevent starvation ketosis and hypoglycemia.
* **Local Protocols:** Pediatric fluid management is highly institution-specific. Always consult your facility’s specific pediatric parenteral fluid protocol before prescribing.
***
*Disclaimer: This information is for educational purposes only. Clinical practice varies by institution and patient-specific factors. Always consult your institutional guidelines and current pharmacopeia or clinical pharmacology resources before prescribing or administering any fluids or medications.*
