SATMED CT Contrast Media Calculator

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Examination & Patient

Select exam · demographics · renal function

Examination (by organ)

Select an examination…

Age (yr)

Sex

Weight (kg)

Height (cm)

Creatinine (µmol/L)

Contrast agent

Iodine conc. (mgI/mL)

Cardiac index (L/min/m²)

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BMI

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BSA m²

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LBW kg

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eGFR

Protocol Reference Library

Study	Dose	Rate	Delay
CT Brain	1.2–1.5 mL/kg	2–3	40–60 s
CAP routine	1.5 mL/kg	3–4	60–70 s
CCTA	50–70 mL	4–6	bolus track
CTPA	50–70 mL	4–5	bolus track
Liver triple	1.5–2 mL/kg	3–5	35/65 s
Runoff	1–1.2 mL/kg	3–4	biphasic

Injection Protocol

Delivery · pressure · extravasation · cost

Injection rate (mL/s)

Contrast volume (mL)

Catheter gauge

Saline flush (mL)

Viscosity (cP, 20°C)

Contrast cost ($/mL)

Iodine load–

Iodine delivery rate (IDR)–

Injection duration–

Pressure & Extravasation

Flow velocity–

Reynolds #–

Peak pressure (est.)–

Flow rate risk–

CI-AKI risk–

Annual Cost Projection

Studies / year

Cost per study–

Annual total–

Fixed→dosed savings / yr–

Dose Recommendations

Fixed · weight · LBW + eGFR · BSA — with hydration protocol

Method	Factor	mL	g Iodine
Fixed dose		–	–
Weight-based	mL/kg	–	–
★ LBW + eGFR adj.	mL/kg	–	–
BSA-based	mL/m²	–	–

★ AI-recommended — eGFR <45: −20% · <30: −30%. Factors editable per site protocol.

AI insight…

Hydration Protocol (row auto-matches patient eGFR)

eGFR ≥60	No IV prophylaxis (ACR/ESUR). Proceed routinely.	Advise patient: drink ~500 mL water in the 2 h before; normal fluids afterwards.	Metformin: continue.
45–59	IV 0.9% NaCl only with risk factors (HF, diabetes, elderly, dehydration): 1 mL/kg/h 3–6 h.	Advise patient: 500 mL water 2 h before; then 1–1.5 L spread over the next 24 h.	Metformin: continue (IV).
30–44	IV 0.9% NaCl 1 mL/kg/h 3–12 h pre + 6–12 h post (~400–600 mL pre for 70 kg); or NaHCO₃ 3 mL/kg 1 h pre + 1 mL/kg/h 6 h post.	Advise patient: if no IV arranged — 500 mL water 2 h before and ≥2 L over 24 h (unless fluid-restricted); report if urine output drops.	Metformin: continue (IV); caution intra-arterial.
<30 / AKI	Full prophylaxis: 0.9% NaCl 1 mL/kg/h 6–12 h pre (≈0.5–1 L) & 4–12 h post; nephrology review; consider alternative imaging.	Advise patient: nothing to eat/drink until the team confirms the plan; IV fluids given in department before and after; monitor urine.	Metformin: withhold; restart ≥48 h once stable.

Patient advice…

Enhancement Kinetics

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Contrast phase Saline flush follows Washout Simplified kinetic model — educational use

eGFR Thresholds — ACR & ESUR Guidance

Contrast-induced nephropathy risk stratification · iodinated CM (IV)

eGFR ≥ 60 — LOW RISK

ACR: proceed routinely; prophylactic hydration not recommended.
ESUR: no prophylaxis required.
Metformin: continue.

eGFR 45–59 — MODERATE

ACR: prophylaxis not required for IV administration; ensure hydration.
ESUR: consider fluids if additional risk factors per local protocol.
Metformin: continue (IV route).

eGFR 30–44 — HIGH

ACR: hydration may be considered; minimize dose.
ESUR: isotonic IV hydration recommended when proceeding.
Metformin: continue (IV); caution intra-arterial.

eGFR < 30 / AKI — VERY HIGH

ACR: prophylactic hydration recommended; consider deferring or alternative imaging.
ESUR: avoid unless essential — specialist review; hydrate if proceeding.
Metformin: withhold; restart ≥48 h once stable.

Reference: ACR Manual on Contrast Media (current edition) · ESUR Guidelines on Contrast Agents v10. Thresholds for intravenous iodinated contrast; verify against the latest published versions and institutional protocol.

Estimates only — not a medical device. Clinical decisions remain with the treating team. © SATMED Health