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IMPACT TBI

IMPACT TBI: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.

ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.

IMPACT TBI

Model (1 core, 2 + CT, 3 + lab)
Ageyears
GCS motor response M (0 = untestable, 1–6)
Non-reactive pupils (0–2)
Hypoxia before admission (1 = yes)
Hypotension (1 = yes)
Marshall CT class (1–6)
Traumatic SAH (1 = yes)
Epidural hematoma (1 = yes)
Glucosemmol/L
Hemoglobing/L
6-month mortality
39.7%
For moderate to severe TBI (GCS 3–12)Population-based estimate; does not replace clinical judgmentIMPACT TBI: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
Unfavorable outcome at 6 months
65.9%
Total points
10

More about: IMPACT TBI

What it calculates

The “IMPACT TBI” calculator computes 6-month mortality in % from 11 parameters: model (1 core, 2 + ct, 3 + lab), age (years), gcs motor response m (0 = untestable, 1–6), non-reactive pupils (0–2), hypoxia before admission (1 = yes), hypotension (1 = yes), marshall ct class (1–6), traumatic sah (1 = yes), epidural hematoma (1 = yes), glucose (mmol/L), hemoglobin (g/L).

Used by professionals and patients to assess health metrics, dosages, and risks.

Example calculation

With parameters Model (1 core, 2 + CT, 3 + lab) = 2, Age = 35 years, GCS motor response M (0 = untestable, 1–6) = 3, Non-reactive pupils (0–2) = 0, Hypoxia before admission (1 = yes) = 1, Hypotension (1 = yes) = 0, Marshall CT class (1–6) = 5, Traumatic SAH (1 = yes) = 1, Epidural hematoma (1 = yes) = 0, Glucose = 10 mmol/L, Hemoglobin = 110 g/L the result is 39.7 % (For moderate to severe TBI (GCS 3–12)).

How to use

  1. Enter model (1 core, 2 + ct, 3 + lab), age, gcs motor response m (0 = untestable, 1–6), non-reactive pupils (0–2), hypoxia before admission (1 = yes), hypotension (1 = yes), marshall ct class (1–6), traumatic sah (1 = yes), epidural hematoma (1 = yes), glucose and hemoglobin — each field above is adjustable with a slider.
  2. 6-month mortality (%) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.

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