Murray Lung Injury Score Calculator

Calculate the Murray Lung Injury Score using 4 components (chest X-ray, PaO2/FiO2, PEEP level, static compliance) to quantify ALI/ARDS severity for ECMO referral decisions (score >2.5).

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate the Murray Lung Injury Score using 4 components (chest X-ray, PaO2/FiO2, PEEP level, static compliance) to quantify ALI/ARDS severity for ECMO referral decisions (score >2.5)

Each component has a specific meaning:

  • PaO2/FiO2 — The pao2/fio2 recorded for the scenario being assessed.
  • PEEP level — The peep level recorded for the scenario being assessed.
  • Static compliance) — The static compliance) recorded for the scenario being assessed.

Note: Interpret the murray lung score result against the thresholds and context described above.

How to Use

Enter the PaO2/FiO2, PEEP level, static compliance) for the scenario you are assessing. Calculate the Murray Lung Injury Score using 4 components (chest X-ray, PaO2/FiO2, PEEP level, static compliance) to quantify ALI/ARDS severity for ECMO referral decisions (score >2.5). Use the murray lung score result to inform your calculation.

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Frequently Asked Questions