Maintenance IV Fluid Calculation

Holliday-Segar Formula:

\[ \text{Daily Fluid} = 100 \text{ mL first 10kg} + 50 \text{ mL next 10kg} + 20 \text{ mL/kg thereafter} \]

Daily Fluid:

Rate:

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1. What is Maintenance IV Fluid Calculation?

The Maintenance IV Fluid Calculation uses the Holliday-Segar formula to determine appropriate daily fluid requirements and hourly infusion rates for patients requiring intravenous fluid therapy. This method is widely used in pediatric and adult clinical practice.

2. How Does the Calculator Work?

The calculator uses the Holliday-Segar formula:

\[ \text{Daily Fluid} = 100 \text{ mL first 10kg} + 50 \text{ mL next 10kg} + 20 \text{ mL/kg thereafter} \]

Where:

\( 100 \text{ mL/kg} \) — For the first 10 kg of body weight
\( 50 \text{ mL/kg} \) — For the next 10 kg of body weight
\( 20 \text{ mL/kg} \) — For each additional kg above 20 kg

Hourly Rate Calculation: Daily fluid divided by 24 hours

3. Importance of Fluid Calculation

Details: Accurate fluid calculation is essential for maintaining proper hydration, electrolyte balance, and preventing complications from overhydration or dehydration in hospitalized patients.

4. Using the Calculator

Tips: Enter patient weight in kilograms. The calculator will automatically compute the daily fluid requirement and hourly infusion rate based on the Holliday-Segar formula.

5. Frequently Asked Questions (FAQ)

Q1: What is the Holliday-Segar formula used for?
A: It's used to calculate maintenance fluid requirements for patients who are NPO (nothing by mouth) or require intravenous fluid replacement.

Q2: Is this formula suitable for all age groups?
A: While commonly used in pediatrics, it can be applied to adults with appropriate clinical judgment and adjustments for specific conditions.

Q3: When should maintenance fluids be adjusted?
A: Adjustments may be needed for fever, dehydration, renal impairment, heart failure, or other medical conditions affecting fluid balance.

Q4: What type of IV fluid is typically used?
A: Common maintenance fluids include 0.9% NaCl, Lactated Ringer's, or D5W with appropriate electrolyte content based on patient needs.

Q5: Are there limitations to this calculation?
A: This provides baseline maintenance only. Additional fluids may be needed for ongoing losses, and individual patient factors must be considered.