Nurse-Led Early Deterioration Surveillance in Adult ICU: A Concept Analysis

Abstract

Background: Early recognition of clinical deterioration in adult intensive care units (ICUs) is essential to preventing avoidable morbidity and mortality. Although ICUs are equipped with advanced monitoring systems, delayed recognition of subtle physiological decline remains a persistent patient-safety concern. This concept analysis aimed to clarify nurse-led early deterioration surveillance in adult ICU settings using Walker and Avant's concept analysis framework, identifying its six defining attributes—continuous observation, clinical reasoning, trend recognition, anticipatory action, escalation of care, and interdisciplinary coordination—together with its antecedents, consequences, and empirical referents.

Methods: A structured literature search of PubMed, CINAHL, Scopus, and SAGE Journals was conducted for peer-reviewed literature published between January 2006 and June 2026, a period that had fully elapsed at the time of writing. PRISMA 2020 was used only to structure and report the search and screening process, consistent with its increasing use in nursing concept analyses; it was not used as a systematic review of intervention effects. Forty-five studies met eligibility criteria and were analysed using Walker and Avant's eight-step method. Formal quality appraisal of included studies was not performed, consistent with concept analysis convention, and this is acknowledged as a limitation.

Results: Six defining attributes were identified: continuous observation, clinical reasoning, trend recognition, anticipatory action, escalation of care, and interdisciplinary coordination. Antecedents included critically ill adult patients, competent ICU nurses, adequate staffing, monitoring technologies, escalation protocols, and organisational safety culture. Effective surveillance was associated with reduced ICU mortality, fewer cardiac arrests, improved patient safety, shorter ICU stay, enhanced nurse confidence, and improved team responsiveness, although these outcomes are also shaped by illness severity and system-level factors. Empirical referents were separated into process indicators of surveillance itself (e.g., reassessment completion, alarm response time, competency scores) and associated clinical outcomes (e.g., rapid response activation rates, ICU mortality, failure-to-rescue events).

Conclusion: Nurse-led early deterioration surveillance is an active, systematic nursing function that links moment-to-moment monitoring data with timely clinical judgement and intervention. Clarifying this concept can support critical care education, workforce development, policy formation, and evaluation of surveillance systems in adult ICUs, including resource-variable settings across the Asia-Pacific region.