Rapid response teams for new leaders: a narrative review of global evidence and implementation strategies with a focus on Japan.

backgroundRapid response systems (RRSs) are designed to detect and treat physiological deterioration before cardiac arrest occurs. Since 2020, Japan has seen a rapid increase in RRS adoption; however, most new team members have not received formal training in critical care. This review synthesises international and Japanese evidence supporting implementation and training for new members.

methodsPubMed, Web of Science and Ichushi Web were searched for English or Japanese studies evaluating adult RRSs (January 2010-April 2025). We included 47 records (43 comparative and 4 systematic reviews); the national guideline was not included.

resultsMature RRSs were associated with a 35% relative reduction in unexpected in-hospital cardiac arrests and a 12% decrease in all-cause hospital mortality. However, the evidence is not uniformly positive-systematic reviews and multicentre analyses reported no significant mortality benefit-and outcome heterogeneity limits comparability. Effective programmes share three key features: (1) single-parameter activation criteria augmented by early-warning scores; (2) tiered response models for advanced practice nurses and (3) audit-feedback cycles with dashboards. Crew resource management, in situ simulation and mindfulness-based self-leadership approaches may be associated with reduced decision latency. Emerging tools like deep-learning prediction algorithms, continuous wearable monitoring and tele-support systems may expand coverage but require governance. Common barriers include limited night-time staffing, cultural reluctance to escalate care and medicolegal ambiguity; targeted education and registry-driven feedback mitigate challenges.

conclusionsWell-structured RRSs improve outcomes beyond traditional code-blue models. Aligning activation thresholds, multidisciplinary competencies and data-driven quality improvement cycles with local resources may help new Japanese rapid response team members develop resilient, high-performing services.