Modes
| Mode | Input | Output |
|---|---|---|
| Dose → Rate | Target dose (e.g. µg/kg/min) + patient weight + syringe concentration | Pump rate in ml/h |
| Rate → Dose | Current pump rate (ml/h) + patient weight + syringe concentration | Delivered dose (µg/kg/min, µg/kg/h, mg/kg/h, IU/kg/h, …) |
Formula
Rate (ml/h) = Dose (µg/kg/min) × Weight (kg) × 60 / Concentration (µg/ml) Concentration (µg/ml) = Drug amount (µg) / Total volume (ml)
The inverse formula gives dose from rate: Dose = Rate × Concentration / (Weight × 60).
Supported Units
| Mass Unit | Typical Use |
|---|---|
| µg | Catecholamines (norepinephrine, epinephrine, dobutamine), fentanyl, remifentanil |
| mg | Midazolam, propofol, amiodarone, nitroglycerin |
| IU | Heparin, insulin, vasopressin |
| Time Unit | Typical Use |
|---|---|
| /min | Catecholamines, vasodilators (standard ICU dosing) |
| /h | Heparin (IU/kg/h), insulin (IU/kg/h), slow infusions |
Examples
Example 1 — Norepinephrine
Setup: 4 mg norepinephrine in 50 ml NaCl 0.9 % → Concentration = 80 µg/ml
Target dose: 0.1 µg/kg/min, Patient weight: 75 kg
Rate = 0.1 × 75 × 60 / 80 = 5.6 ml/h
Example 2 — Heparin
Setup: 25,000 IU heparin in 50 ml NaCl 0.9 % → Concentration = 500 IU/ml
Target dose: 15 IU/kg/h, Patient weight: 80 kg
Rate = 15 × 80 / 500 = 2.4 ml/h
Tips
- The default syringe volume is 50 ml — change it for larger bags or minivolumes.
- Tap the unit chip (µg / mg / IU) to cycle through supported mass units.
- In Rate → Dose mode, all equivalent dose representations (µg/kg/min, µg/kg/h, mg/kg/h) are shown simultaneously.
Use the Dose Calculator interactively in the app.
Open in Scores2GoFor research and educational purposes only. Always verify drug doses against current prescribing information and local pharmacy guidelines.