Acute Kidney Injury Overview

Principles

Definition

Acute kidney injury is a critical medical syndrome characterized by an abrupt decrease in kidney function, typically occurring over hours to days. As a prominent area of clinical and translational research, it investigates the diverse etiologies, underlying cellular and molecular mechanisms, precise diagnostic biomarkers, optimal management strategies, and prognostic indicators associated with this rapid loss of renal capacity, aiming to mitigate its substantial impact on patient outcomes and global health. Research in this field encompasses the study of structural damage and functional impairment across various clinical settings, highlighting its significance as a major public health burden and a key challenge in critical care and nephrology.

Ontological type

Management Strategies

Pathophysiology

Prognosis and Outcomes

Key developments

Key Figures

Systemic AKI Paradigm era

Willem Kolff, a pioneer of the 1940s and 1950s, demonstrated that renal failure could be treated as a systemic problem through the development and refinement of hemodialysis, establishing dialysis as a principal supportive therapy for systemic precipitants of AKI. Belding Scribner, in the 1960s, introduced durable vascular access via the Scribner shunt, enabling regular hemodialysis and integrating dialysis into aggressive management of shock, toxins, and other systemic drivers of acute kidney injury. Thomas Addis's long-standing work on nitrogen metabolism and uremia helped anchor the view that AKI reflects systemic dysregulation rather than a purely glomerular disorder, guiding clinicians to treat systemic drivers alongside renal injury. John Merrill and colleagues further formalized the use of dialysis in acute renal failure during the 1960s, reinforcing the era's paradigm that renal support and systemic care are central to reversing multi-organ precipitants of AKI.

Ischemia-Driven AKI era

Jean‐Louis Vincent [1] is a clinician-scientist active in the ischemia-driven AKI era, affiliated with University of Washington [3] and Radboud University Nijmegen [4]. Vincent [1] contributed to the development and promotion of the SOFA (Sepsis-related Organ Failure Assessment) score [6], a quantitative tool for describing organ dysfunction that proved critical for evaluating severity and prognosis in this era. Rui P. Moreno [2] was affiliated with University of Washington [3] and University of Groningen [5] during this era. Moreno [2] co-authored the SOFA score paper [6], contributing to a standardized organ dysfunction measure that enabled risk stratification and interventional assessment in ischemia-driven AKI.

Surveillance and Biomarkers era

Rinaldo Bellomo [1], affiliated with Johns Hopkins University [3] and Karolinska Institutet [4], was a central figure in advancing AKI surveillance and biomarker-based risk assessment in this era. His key contribution, exemplified by the multinational AKI-EPI study [7], provided multinational epidemiology data on AKI in critically ill patients, enabling standardized risk stratification and benchmarking that shaped surveillance and early biomarker strategies. Claudio Ronco [2], affiliated with Shanghai Medical College of Fudan University [5] and University of California, San Diego [6], emerges as another leading figure in this era's AKI surveillance and biomarker discourse. His key contributions center on coordinating and expanding the AKI-EPI study [7], and contributing to international epidemiology that informs prevention and follow-up strategies for long-term kidney outcomes.