Calcium Gluconate Pediatric Dose — Electrolyte Replacement
Calcium gluconate is an intravenous calcium salt used for electrolyte replacement and repletion of calcium deficits in pediatric patients. It works by directly replenishing ionized calcium, which is essential for myocardial contractility, neuromuscular function, and intracellular signaling. It is commonly used in the management of hypocalcemia in neonates, infants, and older children across inpatient and critical care settings.
Pediatric Dosing
- 60–100 mg/kg IV per dose, infused over 30–60 minutes
- Maximum single dose: 4 g
- May be administered via peripheral IV
The dose is individualized based on the severity of hypocalcemia and clinical response. For most patients, 100 mg/kg is used for moderate-to-severe deficits, while 60 mg/kg may be appropriate for milder repletion needs.
Worked example: For a 15 kg child at 100 mg/kg: 15 × 100 mg/kg = 1,500 mg (1.5 g) administered IV over 30–60 minutes. For a 50 kg adolescent: 50 × 100 mg/kg = 5,000 mg — dose is capped at the maximum of 4 g per dose.
Indications and Clinical Context
Calcium gluconate is indicated for the treatment of symptomatic or laboratory-confirmed hypocalcemia in pediatric patients. Common clinical scenarios include hypoparathyroidism, vitamin D deficiency, renal disease, hypomagnesemia-associated hypocalcemia, and post-cardiac surgery states. It is also used in the management of hyperkalemia and hypermagnesemia where calcium serves a membrane-stabilizing role, as well as in neonatal hypocalcemia.
In the pediatric critical care and emergency setting, calcium repletion follows institutional electrolyte replacement protocols. Clinicians should correlate dosing with ionized calcium levels when available, as total serum calcium may not accurately reflect physiologic calcium status, particularly in hypoalbuminemic patients.
Administration and Monitoring
Calcium gluconate should be administered IV at the prescribed rate of over 30–60 minutes to minimize the risk of bradycardia, hypotension, and cardiac dysrhythmias associated with rapid infusion. Unlike calcium chloride, calcium gluconate is generally well tolerated via peripheral IV access, making it the preferred salt for peripheral administration in pediatric patients. Extravasation should still be monitored closely, as calcium-containing solutions can cause tissue injury.
- Monitor heart rate and rhythm during infusion, particularly in patients on digoxin
- Reassess ionized calcium levels following repletion to guide repeat dosing
- Use with caution in patients with renal impairment or hypercalcemia
- Do not administer simultaneously with bicarbonate-containing solutions due to precipitation risk
- For doses approaching or at the 4 g maximum, consult institutional protocol regarding repeat dosing intervals
Disclaimer: This article is an educational reference summarizing standard pediatric dosing values. It is not a substitute for clinical judgment. Always verify doses against institutional protocols, the current edition of authoritative references (e.g., Lexicomp, Harriet Lane Handbook, PALS guidelines), the patient’s accurate weight, and any patient-specific factors (renal/hepatic function, allergies, comedications) before administration.