🧒 Pediatric Dehydration Severity & Fluid Deficit
This tool estimates the cumulative fluid deficit from clinical dehydration severity to guide a pediatric rehydration plan.
Severe dehydration or shock is resuscitated first with rapid isotonic boluses (10–20 mL/kg) before the staged deficit replacement. (original synthesis · not guideline verbatim)
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When to use
Use to convert an age-group- and severity-based dehydration percentage into a deficit volume, on top of maintenance and ongoing losses.
How it works
Deficit ≈ dehydration% × weight (kg) × 10 mL. Infant/toddler: mild 5/moderate 10/severe 15%. Older child: mild 3/moderate 6/severe 9%.
Key points
- Severe dehydration or shock is resuscitated first with rapid isotonic boluses (10–20 mL/kg) before the staged deficit replacement. (original synthesis · not guideline verbatim)
- The deficit is replaced in stages on top of maintenance, continually accounting for ongoing losses.
- Clinical dehydration grading is subjective and requires dynamic reassessment.
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Age group | Infant/toddler (< 2 yr) |
|---|---|
| Dehydration severity | Mild (slightly dry mucosa, mildly reduced urine, no clear circulatory change) |
| Weight | 10 kg |
→Cumulative fluid deficit (est.)500mL
- Estimated dehydration：5%
| Age group | Older child (≥ 2 yr) |
|---|---|
| Dehydration severity | Severe (lethargy/drowsiness, very slow skin recoil, poor perfusion, anuria) |
| Weight | 10 kg |
→Cumulative fluid deficit (est.)900mL
- Estimated dehydration：9%
Frequently asked questions
- What is Pediatric Dehydration Severity & Fluid Deficit?
- This tool estimates the cumulative fluid deficit from clinical dehydration severity to guide a pediatric rehydration plan.
- How is Pediatric Dehydration Severity & Fluid Deficit calculated? What is the core formula?
- Deficit ≈ dehydration% × weight (kg) × 10 mL. Infant/toddler: mild 5/moderate 10/severe 15%. Older child: mild 3/moderate 6/severe 9%.
- When is Pediatric Dehydration Severity & Fluid Deficit used?
- Use to convert an age-group- and severity-based dehydration percentage into a deficit volume, on top of maintenance and ongoing losses.
- What are the key clinical points for Pediatric Dehydration Severity & Fluid Deficit?
- Severe dehydration or shock is resuscitated first with rapid isotonic boluses (10–20 mL/kg) before the staged deficit replacement. (original synthesis · not guideline verbatim) The deficit is replaced in stages on top of maintenance, continually accounting for ongoing losses. Clinical dehydration grading is subjective and requires dynamic reassessment.
- What are the limits and cautions when using Pediatric Dehydration Severity & Fluid Deficit?
- 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.
- How is Pediatric Dehydration Severity & Fluid Deficit calculated in practice? Can you show a worked example?
- Inputs: Age group Infant/toddler (< 2 yr), Dehydration severity Mild (slightly dry mucosa, mildly reduced urine, no clear circulatory change), Weight 10 kg → Result: Cumulative fluid deficit (est.) 500 mL（Estimated dehydration: 5%） Inputs: Age group Older child (≥ 2 yr), Dehydration severity Severe (lethargy/drowsiness, very slow skin recoil, poor perfusion, anuria), Weight 10 kg → Result: Cumulative fluid deficit (est.) 900 mL（Estimated dehydration: 9%）