Obstetrics · Maternal-Fetal Medicine · ICU and Critical Care

National Partnership Maternal Early Warning Criteria calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Systolic blood pressure

mmHg

Allowed range: 30–300 mmHg

Diastolic blood pressure

mmHg

Allowed range: 10–200 mmHg

Maternal heart rate

/min

Allowed range: 0–300 /min

Respiratory rate

/min

Allowed range: 0–100 /min

Oxygen saturation on room air at sea level

Allowed range: 50–100 %

Urine output <35 mL/hour for at least 2 hoursMaternal agitation, confusion, or unresponsivenessPreeclampsia with non-remitting headache or shortness of breath

Result

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Clinical inputs

Systolic blood pressure (mmHg)Accepted range: 30 to 300
Diastolic blood pressure (mmHg)Accepted range: 10 to 200
Maternal heart rate (/min)Accepted range: 0 to 300
Respiratory rate (/min)Accepted range: 0 to 100
Oxygen saturation on room air at sea level (%)Accepted range: 50 to 100
Urine output <35 mL/hour for at least 2 hours
Maternal agitation, confusion, or unresponsiveness
Preeclampsia with non-remitting headache or shortness of breath

Primary source

Mhyre JM et al. The maternal early warning criteria: a proposal from the National Partnership for Maternal Safety. Obstet Gynecol (2014)

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