Related Experiment Video

Updated: Aug 23, 2025

A Large Animal Model for Acute Kidney Injury by Temporary Bilateral Renal Artery Occlusion
09:02

A Large Animal Model for Acute Kidney Injury by Temporary Bilateral Renal Artery Occlusion

Published on: February 2, 2021

4.5K

The multifactorial dynamic perfusion index: A predictive tool of cardiac surgery associated acute kidney injury

Marco Ranucci1, Umberto Di Dedda1, Mauro Cotza1

  • 1Department of Cardiovascular Anesthesia and Intensive Care, IRCCS Policlinico San Donato, Milan, Italy.

Perfusion
|October 28, 2022
PubMed

Insights

A new model integrating dynamic cardiopulmonary bypass (CPB) data significantly improves prediction of cardiac surgery-associated acute kidney injury (CSA-AKI). This multifactorial dynamic perfusion index (MDPI) offers better predictive ability than static risk models for CSA-AKI.

Area of Science:

  • Nephrology
  • Cardiology
  • Critical Care Medicine

Background:

  • Cardiac surgery-associated acute kidney injury (CSA-AKI) is a significant complication.
  • Preoperative and intraoperative factors contribute to CSA-AKI, but cardiopulmonary bypass (CPB) factors require further elucidation in a unified model.

Purpose of the Study:

  • To develop a dynamic predictive model for CSA-AKI.
  • To assess the predictive performance of a novel multifactorial dynamic perfusion index (MDPI) compared to existing static risk models.

Main Methods:

  • Retrospective analysis of 910 adult cardiac surgery patients.
  • Development of a static risk model (SRM) using baseline data.
  • Creation of a dynamic perfusion risk (DPR) model incorporating CPB-related data (duration, oxygen delivery, mean arterial pressure, lactate, transfusion).
  • Integration of SRM and DPR into the MDPI model.
  • Assessment of model discrimination and calibration using AUC.

Main Results:

  • The static risk model (SRM) had an AUC of 0.696.
  • The dynamic perfusion risk (DPR) model showed an improved AUC of 0.723.
  • The multifactorial dynamic perfusion index (MDPI) achieved the highest AUC of 0.769, significantly outperforming both SRM and DPR.
  • MDPI demonstrated superior discrimination and calibration compared to static models.

Conclusions:

  • Incorporating dynamic CPB indices enhances the predictive accuracy of preoperative risk scores for CSA-AKI.
  • The MDPI model offers superior predictive ability over existing static risk models.
  • MDPI is a promising tool for advanced goal-directed perfusion strategies in cardiac surgery.
Abstract

Keywords:
acute kidney injurycardiopulmonary bypasshematocritoxygen deliveryrisk models

More Related Videos

Noninvasive and Invasive Renal Hypoxia Monitoring in a Porcine Model of Hemorrhagic Shock07:48

Noninvasive and Invasive Renal Hypoxia Monitoring in a Porcine Model of Hemorrhagic Shock

Published on: October 28, 2022

1.3K
Technical Refinement of a Bilateral Renal Ischemia-Reperfusion Mouse Model for Acute Kidney Injury Research03:13

Technical Refinement of a Bilateral Renal Ischemia-Reperfusion Mouse Model for Acute Kidney Injury Research

Published on: November 3, 2023

2.4K

Related Concept Videos

Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
53
Acute Kidney Injury II: Pathophysiology01:29

Acute Kidney Injury II: Pathophysiology

Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...
53
Acute Kidney Injury I: Introduction01:22

Acute Kidney Injury I: Introduction

Introduction:Acute Kidney Injury (AKI) describes a swift decrease in kidney function occurring over hours to days, characterized by the kidneys' failure to remove waste products from the bloodstream. This leads to dangerous complications like metabolic acidosis, fluid overload, and electrolyte imbalances, such as hyperkalemia, which can cause life-threatening arrhythmias. AKI is common in both hospital and outpatient settings, often triggered by dehydration, sepsis, or exposure to nephrotoxic...
59
Acute Kidney Injury III: Clinical Manifestations01:29

Acute Kidney Injury III: Clinical Manifestations

Acute Kidney Injury (AKI) progresses through distinct clinical phases: the oliguric, diuretic, and recovery phases, each marked by unique manifestations and challenges.Oliguric Phase:The oliguric phase is the initial stage of AKI, typically lasting 10 to 14 days. This phase is marked by a significant reduction in urine output, usually less than 400 mL per day, indicating decreased kidney function. Fluid retention is a prominent feature, leading to symptoms such as edema, hypertension, and...
67
Factors Affecting Drug Distribution: Organ Perfusion Rate01:15

Factors Affecting Drug Distribution: Organ Perfusion Rate

Drug distribution within the body is a complex process influenced by several factors, including perfusion rate, the rate at which the bloodstream transports drugs to tissue. This limitation becomes particularly significant when dealing with highly lipophilic drugs. In such cases, the rate at which the drug can move across membranes is crucial, and if the membrane is highly permeable to the drug, distribution becomes rate-limited by perfusion.
Perfusion rate-limited distribution relies on the...
200
Acute Kidney Injury V: Interprofessional Care01:20

Acute Kidney Injury V: Interprofessional Care

Acute Kidney Injury (AKI) requires a collaborative healthcare approach to restore renal function and prevent complications. Essential management strategies involve monitoring fluid and electrolyte balance, adjusting medications, initiating dialysis when necessary, and providing nutritional support.Fluid and Electrolyte ManagementFluid Monitoring: Regularly monitoring body weight, central venous pressure, and urine output helps detect fluid imbalances early. Patient intake and output are...
40