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Professional Technical

SNAP-II

Also written as: SNAP-II — Score for Neonatal Acute Physiology II

Score for Neonatal Acute Physiology II - illness severity scoring system predicting mortality risk in critically ill newborns.

Full Definition

SNAP-II, or Score for Neonatal Acute Physiology II, is a validated illness severity scoring system specifically designed for newborns in intensive care units. This simplified version of the original SNAP score uses six physiologic variables measured within the first 12 hours of NICU admission: mean blood pressure, lowest temperature, PO2/FiO2 ratio, lowest serum pH, presence of seizures, and urine output. Each variable is assigned points based on deviation from normal values, and the total score correlates with mortality risk. SNAP-II scores are commonly used in neonatal research to stratify patient populations by illness severity, compare outcomes across institutions, and adjust for case mix when evaluating quality metrics. The score ranges from 0 to over 100, with higher scores indicating greater illness severity.

Usage

Usage note: Distinguish from SNAP-PE-II which includes perinatal extension variables for additional prognostic accuracy.

In Context

  • "The infant's admission SNAP-II score of 45 indicated high mortality risk requiring intensive monitoring." — Research database entry
  • "SNAP-II scores were used to control for illness severity when comparing outcomes between NICUs." — Quality improvement report

Also known as

Score for Neonatal Acute Physiology II neonatal illness severity score

Don't confuse with

SNAP SNAPPE-II APACHE

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