Sepsis in Obstetrics Score (SOS)
Sepsis in Obstetrics Score (SOS) — a 0-28 physiologic score for the risk of ICU admission in pregnant/postpartum women with suspected sepsis, summing banded points for temperature, systolic BP, heart rate,…
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Temperature band
- 30-31.9 (+3)
- WBC band
- 25-39.9 (+3)
Result: SOS 6 of 28 — high risk of critical-care admission (>= 6).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- < 6
- Low risk of critical-care admission.
- >= 6
- High risk of critical-care admission (derivation AUC ~0.97 for ICU admission; sensitivity ~89%, specificity ~95%). An ICU-admission-risk band, not an admission, transfer, or antibiotic order.
What you enter
- Temperature band (C)
- Systolic BP band (mmHg)
- Heart rate band (bpm)
- Respiratory rate band (breaths/min)
- SpO2 band (%)
- WBC band (x10^3/mm^3)
- % immature neutrophils (< 10% or >= 10%)
- Lactic acid (< 4 or >= 4 mmol/L)
How this is calculated
Albright CM, Ali TN, Lopes V, Rouse DJ, Anderson BL. The Sepsis in Obstetrics Score: a model to identify risk of morbidity from sepsis in pregnancy. Am J Obstet Gynecol. 2014;211(1):39.e1-39.e8. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.