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Related Concept Videos

Acute Kidney Injury II: Pathophysiology01:29

Acute Kidney Injury II: Pathophysiology

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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...
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Acute Kidney Injury I: Introduction01:22

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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...
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Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

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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...
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Cardiac Catheterization I: Pre-Procedure Overview01:28

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Cardiac catheterization is an invasive diagnostic technique used to identify and evaluate structural and functional diseases of the heart and major blood vessels. This technique diagnoses congenital heart disease, coronary artery disease, valvular heart disease, and coronary spasms and assesses ventricular function. It helps guide treatment decisions, including the need for revascularization procedures like percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) and...
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Acute Kidney Injury VI: Nursing Management01:22

Acute Kidney Injury VI: Nursing Management

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Acute Kidney Injury (AKI) results in an inability to maintain fluid, electrolyte, and acid-base balance. Effective nursing management is critical in improving patient outcomes and includes comprehensive patient assessment and targeted interventions.Comprehensive Patient AssessmentA detailed history collection is essential, focusing on any recent infections, nephrotoxic medication use, or chronic conditions such as hypertension and diabetes that may contribute to AKI. During the physical...
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Acute Kidney Injury V: Interprofessional Care01:20

Acute Kidney Injury V: Interprofessional Care

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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...
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Related Experiment Video

Updated: Jul 13, 2025

Technical Refinement of a Bilateral Renal Ischemia-Reperfusion Mouse Model for Acute Kidney Injury Research
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A Decrease in Effective Renal Perfusion Pressure Is Associated With Increased Acute Kidney Injury in Patients

Phat T Dang1, Balbino E Lopez2, Kei Togashi3

  • 1Anesthesiology and Perioperative Medicine, University of California Irvine Health, Orange, USA.

Cureus
|October 13, 2023
PubMed
Summary

Higher renal perfusion pressures may predict lower risk of acute kidney injury (AKI) after cardiac surgery. Monitoring intra-abdominal pressure (IAP) and renal perfusion indices could help identify at-risk patients.

Keywords:
acute kidney injurycardiac surgeryintraabdominal hypertensionintraabdominal pressurekidney perfusion pressures

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Area of Science:

  • Nephrology
  • Cardiovascular Surgery
  • Critical Care Medicine

Background:

  • Postoperative acute kidney injury (AKI) is a significant complication in cardiac surgery.
  • Intra-abdominal pressure (IAP) can influence organ perfusion, including renal perfusion.
  • Effective monitoring of renal perfusion is crucial for early AKI detection.

Purpose of the Study:

  • To investigate the association between intra-abdominal pressure (IAP), renal perfusion indices, and postoperative AKI in patients undergoing cardiac surgery.
  • To evaluate the predictive value of renal perfusion indices for AKI development.

Main Methods:

  • A prospective cohort study involving adult patients undergoing open-heart surgery with cardiopulmonary bypass.
  • Data collected included intra-abdominal pressure (IAP), hemodynamic parameters, and airway pressure.
  • Renal perfusion indices calculated: mean perfusion pressure (MPP), abdominal perfusion pressure (APP), and effective renal perfusion pressure (eRPP).

Main Results:

  • Patients who did not develop AKI had lower IAP and higher renal perfusion indices (MPP, APP, eRPP) during early ICU stay.
  • Higher perfusion pressures were significantly correlated with a lower likelihood of postoperative AKI.
  • The AKI group experienced longer ICU and hospital lengths of stay.

Conclusions:

  • Renal perfusion indices show promise as a tool for predicting postoperative AKI in cardiac surgery.
  • Monitoring IAP and derived perfusion pressures may aid in identifying patients at risk for AKI.