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Related Concept Videos

Acute Pyelonephritis II: Diagnostic Studies and Management01:28

Acute Pyelonephritis II: Diagnostic Studies and Management

Introduction:For diagnosing acute pyelonephritis, a comprehensive patient history is collected to identify symptoms such as dysuria, frequent or urgent urination, flank pain, or costovertebral angle (CVA) tenderness that may suggest a kidney infection.Physical ExaminationDuring the physical examination, CVA tenderness is assessed. This involves gentle percussion over the costovertebral angle, where tenderness often indicates a kidney infection.Diagnostic TestsUrinalysis: Used to identify white...
Acute Pyelonephritis I: Introduction01:27

Acute Pyelonephritis I: Introduction

Pyelonephritis is a bacterial infection that primarily affects the renal parenchyma and collecting system, including the renal pelvis, tubules, and interstitial tissue of one or both kidneys. It can be classified as either acute—a sudden, severe infection—or chronic, which refers to long-term or recurrent kidney infections.The primary cause of acute pyelonephritis (APN) is bacterial infection, with Escherichia coli accounting for approximately 70-80% of cases. Other bacteria, such as Proteus,...
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...
Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of fluid...
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...
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...

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Updated: Jun 3, 2026

Point-of-Care Kidney and Genitourinary Ultrasound in Adults: Image Acquisition
03:19

Point-of-Care Kidney and Genitourinary Ultrasound in Adults: Image Acquisition

Published on: June 21, 2024

Scattered striated persistent nephrogram in sepsis.

Itamar Sagiv1, Benjamin Koslowsky, Maya Korem

  • 1Department of Medicine, Hadassah Hebrew University Hospital, Mt. Scopus, Jerusalem, Israel.

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|March 19, 2011
PubMed
Summary
This summary is machine-generated.

A rare patchy persistent nephrogram, unlike the usual homogenous pattern, was observed in a septic patient. This finding suggests localized kidney blood flow issues, potentially from sepsis and diabetes.

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An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney
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An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney
10:14

An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney

Published on: November 1, 2018

Area of Science:

  • Nephrology
  • Radiology
  • Critical Care Medicine

Background:

  • Persistent nephrogram is a known indicator of radiocontrast-induced kidney injury, typically presenting as a homogenous pattern.
  • This homogenous pattern signifies generalized glomerular filtration shutdown due to altered hemodynamics affecting most glomeruli.

Observation:

  • An incidental finding of a scattered, patchy, and striated persistent nephrogram was observed during a computerized tomography-guided liver abscess drainage.
  • The patient was septic, prediabetic, and hypertensive, presenting a complex clinical scenario.

Findings:

  • The observed patchy pattern suggests a more localized alteration in renal hemodynamics, specifically hypoperfusion in interlobar and intralobular arteries.
  • This contrasts with the typical homogenous pattern indicative of widespread glomerular dysfunction.

Implications:

  • Altered renal microcirculation may result from the combined effects of sepsis, prediabetes, and contrast media on renal blood flow.
  • This could lead to focal hypoxic tubular damage, highlighting a potential mechanism of contrast-induced kidney injury in complex patient populations.