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Related Concept Videos

Acute Pyelonephritis II: Diagnostic Studies and Management01:28

Acute Pyelonephritis II: Diagnostic Studies and Management

301
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...
301
Acute Pyelonephritis I: Introduction01:27

Acute Pyelonephritis I: Introduction

461
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...
461
Urinary Tract Infection II: Pathophysiology01:25

Urinary Tract Infection II: Pathophysiology

558
The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...
558
Acute Kidney Injury III: Clinical Manifestations01:29

Acute Kidney Injury III: Clinical Manifestations

802
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...
802
Kidney Transplant II: Surgical Procedure01:26

Kidney Transplant II: Surgical Procedure

297
Preoperative ManagementThe primary goals of preoperative management in kidney transplantation are to optimize the patient’s metabolic state and prepare them for surgery through diet adjustments, necessary dialysis, and tailored medical treatment. This phase also involves comprehensive infection screening and patient education about the surgical procedure and postoperative care to improve outcomes and adherence.Medical ManagementA comprehensive evaluation is required for both the living...
297
Urinary Tract Infection III: Diagnostic Studies and Interprofessional Care01:30

Urinary Tract Infection III: Diagnostic Studies and Interprofessional Care

239
A healthcare provider can diagnose a urinary tract infection (UTI) through several methods:Medical History and Symptoms: The provider will take a detailed medical history and ask about symptoms such as frequent urination, burning sensation during urination, and lower abdominal pain.Urinalysis: A clean-catch urine sample is collected in a sterile container and tested for the presence of bacteria, white blood cells (leukocytes), nitrites, blood, and protein. The presence of leukocytes and...
239

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Related Experiment Video

Updated: Jan 12, 2026

Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis
06:09

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Case Report: Massive emphysematous pyelonephritis with short-term relapse.

Tingfei Jiang1,2, Letian Meng3, Tong Chen2

  • 1Department of Urology, The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, Nanjing, China.

Frontiers in Medicine
|November 5, 2025
PubMed
Summary

Emphysematous pyelonephritis (EPN) is a severe kidney infection. This case highlights successful CT-guided drainage and antibiotics, but also the risk of relapse, emphasizing careful follow-up for better outcomes.

Area of Science:

  • Nephrology
  • Infectious Diseases
  • Radiology

Background:

  • Emphysematous pyelonephritis (EPN) is a rare, aggressive bacterial infection of the kidney.
Keywords:
emphysematous pyelonephritisinfectionprognosisrelapsetherapy

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  • Early symptoms lack specificity, potentially leading to rapid progression to septic shock.
  • Diagnosis relies on imaging, and treatment involves staging and risk factor assessment.