1NEWS2 Clinical Response Thresholds (RCP 2017)
| NEWS2 Score | Risk Tier | Monitoring Interval | Mandated Clinical Escalation Action |
|---|---|---|---|
| 0 | Low Risk | Minimum 12-hourly | Continue routine ward NEWS2 observations. |
| 1–4 | Low Risk | Minimum 4–6 hourly | Nurse assessment; inform doctor if there is continued clinical concern. |
| 3 in single parameter | Medium (Red Flag) | Minimum 1-hourly | Urgent registered nurse assessment; prompt bedside clinician review. |
| 5–6 | Medium Risk | Minimum 1-hourly | Urgent doctor review; evaluate for sepsis; consider transfer to HDU. |
| ≥ 7 | High Risk (Emergency) | Continuous monitoring | Immediate emergency review by critical care team (ICU Outreach); transfer to ICU. |
2What is the NEWS2 Protocol?
The National Early Warning Score 2 (NEWS2) is the updated standard physiological scoring system developed by the Royal College of Physicians (RCP) to detect clinical deterioration in adult hospital inpatients. It establishes a unified metric across healthcare teams, standardizing escalation and alerting medical emergency teams (MET) before cardiac arrest or irreversible organ damage occurs.
3Understanding SpO₂ Scale 2 (COPD & Hypercapnia)
Patients with chronic obstructive pulmonary disease (COPD) or other forms of chronic hypercapnic respiratory failure often live with baseline hypoxemia. In these patients, supplemental oxygen must be titrated to a lower saturation target of 88% to 92% to prevent carbon dioxide retention (loss of hypoxic ventilatory drive).
Under standard Scale 1, a patient with saturations of 88%–92% would be assigned 2 to 3 points, penalizing an otherwise appropriate clinical target. Scale 2 rescales the scoring so that 88%–92% on room air scores 0 points, while unnecessarily high oxygen saturations on supplemental oxygen (≥93%) are assigned penalty points (+2 to +3) to guard against oxygen-induced hypercapnia.
4The ACVPU Upgrade from AVPU
The major diagnostic upgrade in NEWS2 was the addition of "C" for New-Onset Confusion or Delirium into the traditional AVPU (Alert, Voice, Pain, Unresponsive) scale. Acute encephalopathy, confusion, disorientation, or delirium is a major early indicator of occult sepsis, intracranial pathology, or profound metabolic disturbance. Under NEWS2, any patient with new confusion immediately receives 3 points, functioning as an independent clinical red flag.