Reconceptualizing Acuity in Critical Care: Integrating Nursing Workload into Staffing and Clinical Decision-Making

<p style="font-weight: 400;"><strong>Introduction: </strong>Acuity-based severity scoring tools are widely used in intensive care units (ICU) to quantify illness severity and inform clinical and staffing decisions. However, their ability to capture the full complexity of nursing workload and its impact on patient outcomes remains unclear in practice across the ICU setting. <p style="font-weight: 400;"><strong>Methods: </strong>An integrative review was conducted using PubMed and CINAHL. Search terms related to workload, staffing, acuity, and critical care were combined using Boolean operators. Inclusion criteria were peer-reviewed studies (2021-2025) focused on adult ICU nursing workload and severity scoring. Pediatric, neonatal, and non-nursing studies were excluded. After screening 175 articles, 11 studies were included. Designs were primarily quantitative observational. Quality appraisal used Joanna Briggs Institute tools, and data were synthesized using Whittemore and Knafl&rsquo;s established framework with rigorous thematic analysis. <p style="font-weight: 400;"><strong>Results: </strong>Three themes emerged: conceptualizing workload, determinants of workload, and utilization of workload data. Objective measures did not consistently align with subjective workload, particularly emotional and cognitive demands.&nbsp;Workload was influenced by patient trajectory, severity, nurse experience, and shift context. Severity tools were not direct predictors of outcomes. Improved outcomes were associated with active, consistent, and timely use of workload data in staffing decisions. Discrepancies between calculated and actual staffing were common across multiple ICU settings. <p style="font-weight: 400;"><strong>Conclusion: </strong>Severity tools are insufficient alone; effective use requires integration with clinical judgement, shift context, and responsive leadership in the complex ICU environment.