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LASTCalc
Local Anaesthetic Systemic Toxicity Calculator
kg
⌄
Body Metrics (optional — refines dose weight)
Sex (for LBW/IBW)
Drugs Given
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Ropivacaine max dose
Block & Additives
Block dur.
—
Additives
Total Topical Lidocaine
0 mg
Max — mg (9 mg/kg topical)
SAFE
Nebulised / spray bioavailability
Conservative: full administered dose counted
Topical Agents Used
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Breakdown
No agents added — tap to view
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Loading Bolus
Slow IV bolus · 1–1.5 mg/kg over 2–4 min (max 20 min) · Oxford Handbook of Anaesthesia
Duration
Maintenance Infusion
0.5–2 mg/kg/hr · Usual starting rate 1 mg/kg/hr
Rate
mg/kg/hr
Preparation
Syringe driver (50 ml) or pre-mixed 0.1% bag — based on infusion settings above
Mixing Calculator
How to achieve a target concentration by mixing two available strengths