What is a double-volume exchange transfusion?

A double-volume exchange transfusion (DVET) removes and replaces twice the neonate's estimated blood volume (EBV). This process exchanges approximately 85–90% of circulating red blood cells and is the standard approach for treating severe neonatal jaundice or hemolytic disease.

Why is a different EBV used for preterm infants?

Preterm neonates (<37 weeks) have a higher blood volume per kilogram body weight (approximately 100 mL/kg) compared to term neonates (approximately 80 mL/kg) due to differences in body composition and red cell mass. Using the correct EBV prevents under- or over-estimation of the required blood volume.

What aliquot size should be used per cycle?

Standard practice is to exchange 5–10 mL/kg per cycle (aliquot), removing and replacing small volumes alternately. This calculator recommends 5 mL/kg per aliquot as the conservative default, but the clinical team should adjust based on the infant's hemodynamic stability.

Does this calculator account for the anticoagulant in donor blood?

No. This tool calculates the net exchange volume only. The blood bank will prepare the total ordered volume of packed red blood cells and fresh frozen plasma in the appropriate ratio (typically 2:1 or as ordered). Always confirm the final volume and preparation details with your blood bank.

Is this tool a substitute for clinical judgment?

No. This calculator is an educational and quick-reference tool. Final decisions regarding exchange transfusion must be made by qualified neonatal clinicians based on the infant's complete clinical picture, institutional protocols, and current guidelines.

Exchange Transfusion Volume

Enter the neonate's weight to calculate the total blood volume required for a double-volume exchange transfusion.

Patient Parameters

Neonate Weight

Gestational Age

Term
≥37 weeks · 80 mL/kg Preterm
<37 weeks · 100 mL/kg

Aliquot Size (mL/kg per cycle)

Standard: 5 mL/kg. Adjust per clinical protocol.

Results

Enter weight and press Calculate

Summary

Exchange transfusion is a critical neonatal procedure used to treat severe hyperbilirubinemia, hemolytic disease of the newborn, and certain metabolic disorders. A double-volume exchange transfusion replaces approximately 85–90% of the infant's circulating blood volume by exchanging twice the estimated blood volume (EBV). This calculator uses the standard EBV of 80 mL/kg for term neonates and 100 mL/kg for preterm neonates to determine the total donor blood required.

How it works

Enter the neonate's weight in kilograms or grams.
Select gestational age category: term (≥37 weeks) or preterm (<37 weeks).
The estimated blood volume (EBV) is calculated: 80 mL/kg for term, 100 mL/kg for preterm.
Total exchange volume = 2 × EBV (double-volume exchange).
The tool also shows the recommended aliquot size per cycle and estimated number of cycles.

Use cases

Treating severe neonatal hyperbilirubinemia (jaundice) unresponsive to phototherapy.
Managing hemolytic disease of the newborn (HDN) due to Rh or ABO incompatibility.
Rapid removal of toxic metabolites in neonatal metabolic emergencies.
Calculating packed red blood cells needed when preparing blood bank orders.
Teaching and training scenarios in neonatal intensive care units.
Quick bedside reference for NICU staff preparing exchange transfusion procedures.

Frequently Asked Questions

Last updated: 2026-09-30 · Reviewed by Nham Vu