Score for Neonatal Acute Physiology in newborn intensive care units.
NICU physiological markers
Mortality Prediction
SNAP-II Score0/ 115
Est. Mortality< 1%
Normal Resuscitation / Low Score
Newborn Severity Assessment
Score Interpretation
0 - 9Low risk of mortality
10 - 19Mild illness
20 - 39Moderate illness
≥ 40High risk of mortality
Overview
The SNAP-II score (Score for Neonatal Acute Physiology, Version II) is a validated clinical tool used to estimate the risk of hospital mortality in newborns of any birth weight who are admitted to a Neonatal Intensive Care Unit (NICU). It relies on six physiological variables measured during the first 12 hours of admission.
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Pro Tips
Include only data from the first 12 hours of admission to the NICU.
Ensure multiple seizures are verified and not just single sporadic twitches.
Urine output is calculated as ml per kg of birth weight per hour.
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Fun Facts
"SNAP-II is highly predictive of neonatal mortality and can be used to compare results across different NICUs."
"It is simpler to calculate than its predecessor (SNAP), as it uses fewer items while maintaining accuracy."
"Variables are chosen based on the 'worst' physiological value recorded in the observation period."
"The PO₂ / FiO₂ ratio should use PaO₂ in mmHg divided by FiO₂ as a fraction (e.g., 21% = 0.21)."
Formula: Total Score = Sum of points from 6 physiological items (0 - 115).
