Log in
Professional accountDoctors and healthcare professionals Eltern-Kind-Passwith ID Austria – coming soon
Register
Create professional accountDoctors and healthcare professionals Eltern-Kind-Passwith ID Austria – coming soon

This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.

SNAPPE-II

SNAP-II plus birth weight, SGA and 5-minute Apgar – mortality risk, 0–162 points

Lowest mean arterial pressure (mmHg)
Lowest temperature
PaO₂/FiO₂ in mmHg (first divide PaO₂ in mmHg by FiO₂ as a decimal)

Example: PaO₂ 60 mmHg at FiO₂ 0.4 → 60 ÷ 0.4 = 150 mmHg. The original table gives the ratio in units of 100 (2.49 = 249 mmHg).

Lowest serum pH
Multiple seizures
Urine output (ml/kg/h)
Birth weight (g)
Small for gestational age (< P3)
Apgar score at 5 minutes

Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.

Frequently asked questions

SNAPPE-II: What does this calculator compute?

SNAPPE-II (Richardson 2001): SNAP-II supplemented by the perinatal factors birth weight, SGA (< P3) and 5-minute Apgar – sum 0–162 as a measure of mortality risk, with the cut-offs of the validation studies.

SNAPPE-II: Which sources is this calculator based on?

Richardson DK, Corcoran JD, Escobar GJ, Lee SK: SNAP-II and SNAPPE-II: Simplified newborn illness severity and mortality risk scores (J Pediatr 138:92–100) (2001); Harsha SS, Archana BR: SNAPPE-II (Score for Neonatal Acute Physiology with Perinatal Extension-II) in predicting mortality and morbidity in NICU (J Clin Diagn Res 9:SC10–SC12) (2015)