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Related Concept Videos

Urinary Tract Calculi I: Introduction01:28

Urinary Tract Calculi I: Introduction

Renal calculi, or kidney stones, are solid deposits of minerals and salts formed inside the kidneys. In medical terminology, "calculus" refers to the stone itself, while "lithiasis" describes the process of stone formation. Depending on their location within the urinary system, these stones may be classified as either urolithiasis, when situated within the urinary tract, or nephrolithiasis, when located within the kidneys. Each term signifies the specific impact of the stone.Predisposition...
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations01:26

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

Renal calculi, commonly termed kidney stones, are crystalline solid masses that form in the kidneys but can occur at any point within the urinary system, encompassing the kidneys, ureters, bladder, and urethra.The pathophysiology of renal stones involves several key factors: supersaturation of the urine with stone-forming constituents, changes in urine pH, a decrease in urine volume, and the presence of substances that promote or inhibit stone formation.Supersaturation of Urine: This is the...
Urinary Tract Calculi III: Medical Management01:30

Urinary Tract Calculi III: Medical Management

The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...
Urinary Tract Calculi VI: Surgical Management01:25

Urinary Tract Calculi VI: Surgical Management

Procedures for Kidney StonesMedical intervention is necessary when kidney stones or renal calculi are too large to pass spontaneously (typically greater than 5 millimeters) when stones are accompanied by symptomatic infection (such as fever or pyelonephritis), when they impair kidney function, or when they cause persistent symptoms like severe pain, nausea, or urinary retention. Additionally, patients with only one kidney or those who cannot be treated with medical management also require...
Urinary Tract Infection I: Introduction01:26

Urinary Tract Infection I: Introduction

Urinary tract infections (UTIs) impact various parts of the urinary system, including the kidneys, ureters, bladder, and urethra. These infections are generally bacterial, with Escherichia coli being the most common causative agent, often originating from the gastrointestinal tract. However, other bacteria, such as Staphylococcus saprophyticus, Klebsiella pneumoniae, and Proteus mirabilis, are also known to cause UTIs. The type, location, and underlying complexity of the UTI guide both...
Urinary Tract Infection II: Pathophysiology01:25

Urinary Tract Infection II: Pathophysiology

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...

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Related Experiment Video

Updated: Jun 13, 2026

Establishment and Characterization of UTI and CAUTI in a Mouse Model
08:40

Establishment and Characterization of UTI and CAUTI in a Mouse Model

Published on: June 23, 2015

[Urinary tract infections and Urolithiasis].

A Meissner1, C Mamoulakis, N Laube

  • 1Academic Medical Center, Department of Urology, University of Amsterdam, Meibergdreef 9, NL-1105, AZ Amsterdam, Niederlande. a.meissner@amc.uva.nl

Der Urologe. Ausg. A
|May 8, 2010
PubMed
Summary

Struvite, or "infection stones," form in alkaline urine due to bacteria. While less common now, they require complete removal and specific prevention strategies due to rapid growth and recurrent infection risks.

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Last Updated: Jun 13, 2026

Establishment and Characterization of UTI and CAUTI in a Mouse Model
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Establishment and Characterization of UTI and CAUTI in a Mouse Model

Published on: June 23, 2015

An In Vitro Bladder Model of Catheter-Associated Urinary Tract Infection
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An In Vitro Bladder Model of Catheter-Associated Urinary Tract Infection

Published on: June 24, 2025

Area of Science:

  • Urology
  • Microbiology
  • Mineralogy

Background:

  • Struvite stones, known as "infection stones," form from urease-positive bacteria in alkaline urine (pH > 7.5).
  • Improved diagnostics and antibiotics have reduced infection-related stones, but overall urolithiasis prevalence is rising.
  • Struvite often coexists with other minerals, suggesting diverse causes for urinary stone formation.

Purpose of the Study:

  • To highlight the characteristics and clinical implications of struvite stone formation.
  • To emphasize the importance of mineral analysis in diagnosing urinary stones.
  • To outline management strategies for patients with infection stones.

Main Methods:

  • Review of literature on struvite stone formation and characteristics.
  • Analysis of clinical guidelines regarding infection stones.
  • Discussion of the role of bacterial activity and urine chemistry.

Main Results:

  • Struvite stones grow rapidly, embedding bacteria and causing persistent urinary tract infections.
  • Accessory mineral phases in struvite stones may indicate non-infectious etiologies.
  • Infection stones are classified as high-risk, necessitating aggressive treatment.

Conclusions:

  • Complete removal of struvite stones and debris is crucial for successful therapy.
  • A specialized metaphylaxis strategy is essential for managing infection stones.
  • Mineral analysis is vital for comprehensive diagnosis and treatment planning.