Executive Summary

This briefing document synthesizes the NICE NG253 (2025) guidelines for the recognition, assessment, and early management of suspected sepsis in individuals aged 16 and over. The central shift in practice is the mandatory use of the National Early Warning Score 2 (NEWS2) for risk stratification in acute hospital settings, ambulances, and acute mental health facilities.

Critical Takeaways:

• Risk Stratification: NEWS2 scores define risk levels: High Risk (\ge7), Moderate Risk (5–6), Low Risk (1–4), and Very Low Risk (0).
• The "Red Flag" Single Parameter: A score of 3 in any single NEWS2 parameter requires an urgent high-priority review by an FY2 or above to determine if the patient is at higher risk than the total score suggests.
• Antibiotic Timelines:
• Fluid Resuscitation: Initial bolus is now 250 ml (reduced from 500 ml) of isotonic crystalloid, with reassessment after every bolus up to a 1,000 ml limit.
• Peripheral Vasopressors: Now recognized for initial management of hypotension/shock if fluids fail, following consultation with critical care.