Fluid Calculator (Holliday-Segar formula) by MDCalc

Holliday-Segar Formula:

\[ \text{Fluid (ml/day)} = \begin{cases} 100 \times \text{Weight (kg)} & \text{for first 10kg} \\ 50 \times \text{Weight (kg)} & \text{for next 10kg} \\ 20 \times \text{Weight (kg)} & \text{for remaining weight} \end{cases} \]

Daily Maintenance Fluid:

Hourly Maintenance Fluid:

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1. What is the Holliday-Segar Formula?

Definition: The Holliday-Segar formula calculates maintenance fluid requirements for pediatric and adult patients based on body weight.

Purpose: It helps healthcare professionals determine appropriate intravenous or oral fluid administration rates.

2. How Does the Calculator Work?

The calculator uses the formula:

Explanation:

First 10 kg: 100 ml/kg/day
Next 10 kg (11-20 kg): 50 ml/kg/day
Remaining weight (>20 kg): 20 ml/kg/day

3. Importance of Maintenance Fluid Calculation

Details: Proper fluid calculation prevents dehydration or fluid overload, especially important in pediatric patients and critical care.

4. Using the Calculator

Tips: Enter the patient's weight in kilograms. The calculator provides both daily and hourly fluid requirements.

5. Frequently Asked Questions (FAQ)

Q1: When should I use the Holliday-Segar formula?
A: It's most commonly used for pediatric patients but can be applied to adults for maintenance fluid calculations.

Q2: Does this include replacement fluids for losses?
A: No, this calculates only maintenance fluids. Additional fluids may be needed for ongoing losses (diarrhea, vomiting, etc.).

Q3: How do I adjust for fever or other conditions?
A: Increase fluids by 12% per degree Celsius above 38°C. Consult clinical guidelines for specific conditions.

Q4: What's the maximum daily fluid recommended?
A: Typically 2400 ml/day for adults, but clinical judgment should always be used.

Q5: How accurate is this for neonates?
A: Not recommended for neonates (under 1 month). Use specific neonatal formulas instead.