💧 Maintenance Fluid (Holliday-Segar)
Daily maintenance fluid volume and hourly rate by weight using the Holliday-Segar 4-2-1 / 100-50-20 method. Instant, browser-side.
Clinical takeaway
This is a baseline maintenance estimate only.
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When to use
Estimate baseline maintenance fluids; adjust for fever, ongoing losses and cardiac/renal function.
How it works
Hourly = first 10 kg × 4 + next 10 kg × 2 + remainder × 1 mL/kg/h; daily = 100/50/20 mL/kg/day by the same bands.
Key points
- This is a baseline maintenance estimate only.
- Add for fever and ongoing fluid losses.
- Reduce with cardiac or renal impairment.
- Titrate to intake/output and the clinical picture.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Frequently asked questions
- What is Maintenance Fluid (Holliday-Segar)?
- Daily maintenance fluid volume and hourly rate by weight using the Holliday-Segar 4-2-1 / 100-50-20 method. Instant, browser-side.
- How is Maintenance Fluid (Holliday-Segar) calculated? What is the core formula?
- Hourly = first 10 kg × 4 + next 10 kg × 2 + remainder × 1 mL/kg/h; daily = 100/50/20 mL/kg/day by the same bands.
- When is Maintenance Fluid (Holliday-Segar) used?
- Estimate baseline maintenance fluids; adjust for fever, ongoing losses and cardiac/renal function.
- What are the key clinical points for Maintenance Fluid (Holliday-Segar)?
- This is a baseline maintenance estimate only. Add for fever and ongoing fluid losses. Reduce with cardiac or renal impairment. Titrate to intake/output and the clinical picture.
- What are the limits and cautions when using Maintenance Fluid (Holliday-Segar)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.