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Related Concept Videos

Acute Pyelonephritis I: Introduction01:27

Acute Pyelonephritis I: Introduction

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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...
641
Acute Pyelonephritis II: Diagnostic Studies and Management01:28

Acute Pyelonephritis II: Diagnostic Studies and Management

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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...
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Criteria for Causality: Bradford Hill Criteria - II01:28

Criteria for Causality: Bradford Hill Criteria - II

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The Bradford Hill criteria serve as guidelines for establishing causative links in epidemiological research. Beyond Strength, Consistency, Specificity, and Temporality, key criteria also include Biological Gradient, Plausibility, Coherence, Experiment, and Analogy. These principles assist scientists in assessing the likelihood of causation in complex biological contexts. Below is a summary of these concepts:
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Criteria for Causality: Bradford Hill Criteria - I01:30

Criteria for Causality: Bradford Hill Criteria - I

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The Bradford Hill criteria are a group of principles that provide a framework to determine a causal relationship between a specific factor and a disease. There are nine criteria that are pivotal in assessing causality in epidemiological studies. Here's a closer look at Strength, Consistency, Specificity, and Temporality criteria with definitions and examples:
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Criteria for Aromaticity and the Hückel 4n + 2 Rule01:20

Criteria for Aromaticity and the Hückel 4n + 2 Rule

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Like benzene, cyclobutadiene and cyclooctatetraene are cyclic compounds with alternate single and double bonds. However, their chemical behavior differs from benzene, as they are unstable and not aromatic. So, what are the structural characteristics of unsaturated compounds categorized as aromatic?  
For the first time, Eric Hückel, a German chemical physicist, derived a set of structural features for a compound to be classified as aromatic. This is now known as Hückel’s rule or the 4n +...
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Yield Criteria for Ductile Materials under Plane Stress01:25

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In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
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Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis
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ACR Appropriateness Criteria® Acute Pyelonephritis.

, Paul Nikolaidis1, Vikram S Dogra2

  • 1Panel Chair, Northwestern University, Chicago, Illinois.

Journal of the American College of Radiology : JACR
|November 6, 2018
PubMed
Summary
This summary is machine-generated.

Pyelonephritis is a kidney infection that can lead to abscesses if untreated, especially in diabetic patients. Prompt diagnosis and treatment are crucial to prevent complications and renal damage.

Keywords:
AUCAppropriate Use CriteriaAppropriateness CriteriaCTDiagnostic imagingMRIPyelonephritisRenal infectionRenal parenchyma

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Area of Science:

  • Nephrology
  • Infectious Diseases
  • Radiology

Background:

  • Pyelonephritis involves infection of the kidney parenchyma and pelvis.
  • Complications like renal abscesses can arise from delayed treatment or immunocompromise.
  • Diabetic patients face increased risks, including emphysematous pyelonephritis and atypical symptoms.

Purpose of the Study:

  • To summarize the clinical presentation, risk factors, and management of pyelonephritis.
  • To highlight the role of imaging modalities in diagnosing and managing pyelonephritis.
  • To discuss the application of evidence-based guidelines in pyelonephritis care.

Main Methods:

  • Clinical diagnosis and response to antibiotics for uncomplicated cases.
  • Identification of high-risk populations and predisposing factors.
  • Utilization of imaging techniques such as CT, MRI, and ultrasound.
  • Application of the American College of Radiology Appropriateness Criteria.

Main Results:

  • Most uncomplicated pyelonephritis cases respond to antibiotics.
  • Risk factors for complications include diabetes, urinary tract abnormalities, and immunosuppression.
  • Imaging is essential for diagnosis and management, guided by established criteria.

Conclusions:

  • Effective management of pyelonephritis requires prompt treatment to prevent renal damage and recurrence.
  • Identifying and addressing predisposing factors is key to long-term patient outcomes.
  • Imaging guidelines aid in appropriate diagnostic and treatment strategies for pyelonephritis.