SNAP-II Neonatal Severity Score

Calculate the Score for Neonatal Acute Physiology II (SNAP-II) using mean blood pressure, lowest temperature, PaO2/FiO2 ratio, serum pH, multiple seizures, and urine output to predict NICU mortality.

Weight
Height
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 Score for Neonatal Acute Physiology II (SNAP-II) using mean blood pressure, lowest temperature, PaO2/FiO2 ratio, serum pH, multiple seizures, and urine output to predict NICU mortality

Each component has a specific meaning:

  • Mean blood pressure — The mean blood pressure recorded for the scenario being assessed.
  • Lowest temperature — The lowest temperature recorded for the scenario being assessed.
  • PaO2/FiO2 ratio — The pao2/fio2 ratio recorded for the scenario being assessed.
  • Serum pH — The serum ph recorded for the scenario being assessed.
  • Multiple seizures — The multiple seizures recorded for the scenario being assessed.
  • Urine output — The urine output recorded for the scenario being assessed.

Note: Interpret the snap-ii score result against the thresholds and context described above.

How to Use

Enter the mean blood pressure, lowest temperature, PaO2/FiO2 ratio, serum pH, multiple seizures, urine output for the scenario you are assessing. Calculate the Score for Neonatal Acute Physiology II (SNAP-II) using mean blood pressure, lowest temperature, PaO2/FiO2 ratio, serum pH, multiple seizures, and urine output to predict NICU mortality. Use the snap-ii score result to inform your calculation.

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Frequently Asked Questions