MEOWS (Modified Early Obstetric Warning System)
Modified Early Obstetric Warning Score (Singh 2012): respiratory rate, SpO2, temperature (Celsius), systolic and diastolic BP, heart rate, AVPU neurological response, and a 0-3 pain score are each banded green/yellow/red.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Respiratory rate
- 16 breaths/min
- SpO2
- 98 %
- Temperature
- 37.0 C
- Systolic BP
- 118 mmHg
- Diastolic BP
- 72 mmHg
- Heart rate
- 82 bpm
- Neurological response
- A - Alert
- Pain score
- 0
Result: MEOWS: no trigger (0 red, 0 yellow). Continue routine monitoring per Singh 2012.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- no trigger
- All parameters normal or fewer than two yellows. Continue routine maternal observations per local protocol.
- >=1 red OR >=2 yellow
- Activate the obstetric MEOWS response per Singh 2012 (escalation to the on-call obstetric / anaesthetic team and structured re-assessment).
What you enter
- Respiratory rate
- SpO2
- Systolic BP
- Diastolic BP
- Heart rate
- Temperature
- Neurological response (AVPU)
- Pain score (0-3)
How this is calculated
Singh A, McGlennan A, England A, Simons R. A validation study of the CEMACH recommended modified early obstetric warning system (MEOWS). Anaesthesia. 2012;67(1):12-18. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.