1 NEWS2 Clinical Response Thresholds (RCP 2017)
| NEWS2 Score | Risk Level | Monitoring Frequency | Clinical Response Action Plan |
|---|---|---|---|
| 0 | Low | Minimum 12-hourly | Continue routine NEWS monitoring |
| 1–4 | Low | Minimum 4–6 hourly | Nurse assessment; inform responsible clinician if continued concern |
| 3 in single parameter | Medium (Red Flag) | Minimum 1-hourly | Urgent nurse assessment; inform responsible clinician for review |
| 5–6 | Medium | Minimum 1-hourly | Urgent clinician review; consider higher-level care ward |
| ≥7 | High | Continuous | Emergency assessment by critical care–competent team; consider ICU/HDU |
2 What is NEWS2?
NEWS2 (National Early Warning Score 2) is the second iteration of the National Early Warning Score, updated by the Royal College of Physicians (RCP) in 2017 to address the growing recognition of sepsis as a major driver of acute patient deterioration in hospital settings. It replaced NEWS (2012) primarily by adding a new-onset confusion criterion to the consciousness parameter (ACVPU vs AVPU) and by introducing SpO₂ Scale 2 for patients with chronic hypercapnic respiratory failure.
The score is used to standardize the identification of patients at risk of clinical deterioration across all wards. It provides a common language between nurses, junior doctors, and senior clinicians for communicating physiological status, and it triggers a structured escalation response proportional to the severity of abnormality.
Understanding SpO₂ Scale 2 (COPD Patients)
Patients with Type 2 respiratory failure (hypercapnic, commonly COPD) are prescribed a lower oxygen saturation target of 88–92% to avoid suppressing their hypoxic drive. Using the standard Scale 1 for these patients would penalize their correctly managed, lower-target saturations with falsely high NEWS2 points. Scale 2 adjusts scoring so that the 88–92% range scores 0–1 points on air, while inappropriately high saturations on supplemental oxygen (≥93%) are flagged with a higher score.
Scale 2 must only be used when there is a documented clinical decision to target 88–92% — it should never be applied to all COPD patients indiscriminately.
The ACVPU Upgrade from AVPU
The original AVPU scale classified consciousness as Alert, responds to Voice, responds to Pain, or Unresponsive. NEWS2 introduced "C" for new-onset Confusion as a fifth category, positioned between Alert and Voice. New confusion is an important early sign of sepsis, metabolic derangement, and intracranial pathology, and was previously under-weighted in the NEWS system. Any state other than "Alert" (including new confusion) scores 3 points.
Limitations of NEWS2
- Not validated in children (<16 years), pregnancy, or patients with chronic physiological abnormalities.
- A baseline high NEWS2 in patients with chronic lung disease may mask acute changes — trend matters more than absolute score.
- Does not directly assess urine output, lactate, or mental state depth — supplement with clinical assessment.
- Requires accurate physiological measurement — poorly taken readings lead to incorrect scores.
Medical disclaimer: This calculator is for educational and clinical decision-support purposes only. It does not replace clinical judgment or specialist consultation. RxMedCalc is not liable for clinical decisions made solely on this tool.