VetCRI
Constant Rate Infusion Calculator
kg
Neutral Insulin (Actrapid) CRI
IU/ml
IU
ml
IU/kg/hr
Standard: 0.05 – 0.1 IU/kg/hr
Phosphate CRI
mmol/ml
AU/NZ: 1.45 · US K-Phos: 3.0
mmol/kg/hr
ml
hrs
Magnesium Sulfate CRI
mmol/ml
mmol/kg/day
Standard: 0.375–0.5 (= 0.75–1 mEq/kg/day)
ml
hrs
Phase 2: half rate for another 24 hrs
Potassium Chloride CRI
Tap a row to auto-fill dose rate
| Serum K+ | Severity | Dose (mEq/kg/hr) |
|---|---|---|
| < 2.0 | Critical | up to 0.5 |
| 2.0 – 2.5 | Severe | 0.3 – 0.5 |
| 2.5 – 3.0 | Moderate | 0.15 – 0.25 |
| 3.0 – 3.5 | Mild | 0.1 – 0.15 |
| 3.5 – 5.0 | Maint. | 0.05 |
mmol/ml
mmol/kg/hr
Max safe rate: 0.5 mEq/kg/hr
ml
Edit either Duration or Infusion Rate — the other auto-calculates
hrs
ml/hr
e.g. maintenance fluid rate
References
VETEMCRIT DKA ·
Merck Vet Manual K+ ·
Today’s Vet Practice ·
VETEMCRIT Phosphate
Disclaimer: This calculator is a clinical decision support tool only. Always verify calculations independently and exercise clinical judgement. Not a substitute for professional veterinary advice.