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Related Concept Videos

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 IV: Nutrition Therapy and Prevention01:27

Urinary Tract Calculi IV: Nutrition Therapy and Prevention

Management of renal calculi focuses on effective strategies like tailored nutrition and hydration therapy. Adjusting diet and fluid intake reduces stone formation and recurrence, making these interventions simple yet powerful in kidney stone prevention and management.Understanding Kidney StonesKidney stones form when calcium, oxalate, uric acid, and cystine concentrate and crystallize in urine. Factors contributing to their formation include genetic predisposition, certain medical conditions,...
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 V: Nursing Management01:28

Urinary Tract Calculi V: Nursing Management

AssessmentSubjective Data: Obtain a detailed health history, including any recent or chronic urinary tract infections, periods of immobilization, previous episodes of renal calculi, and medical conditions such as gout, benign prostatic hyperplasia, or hyperparathyroidism. Review the medication history for drugs that may influence stone formation, including allopurinol, analgesics, loop diuretics, or thiazide diuretics. Document the use of long-term indwelling catheters and any past surgical...
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...

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Related Experiment Video

Updated: May 18, 2026

Estimation of Urinary Nanocrystals in Humans using Calcium Fluorophore Labeling and Nanoparticle Tracking Analysis
07:45

Estimation of Urinary Nanocrystals in Humans using Calcium Fluorophore Labeling and Nanoparticle Tracking Analysis

Published on: February 9, 2021

Gout, stone composition and urinary stone risk: a matched case comparative study.

Giovanni Scala Marchini1, Carl Sarkissian, Devin Tian

  • 1Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA.

The Journal of Urology
|October 2, 2012
PubMed
Summary
This summary is machine-generated.

Patients with gout and urolithiasis commonly form uric acid stones, but hyperoxaluria is also prevalent. Allopurinol treatment shifts stone composition towards calcium oxalate, mimicking non-gout patients.

Related Experiment Videos

Last Updated: May 18, 2026

Estimation of Urinary Nanocrystals in Humans using Calcium Fluorophore Labeling and Nanoparticle Tracking Analysis
07:45

Estimation of Urinary Nanocrystals in Humans using Calcium Fluorophore Labeling and Nanoparticle Tracking Analysis

Published on: February 9, 2021

Area of Science:

  • Nephrology
  • Urology
  • Rheumatology

Background:

  • Gout and urolithiasis frequently coexist.
  • Understanding stone composition and biochemical profiles in gout patients is crucial for effective management.

Purpose of the Study:

  • To determine the most common stone composition and biochemical features in patients with gout and urolithiasis.
  • To compare these features between gout patients and a matched cohort of non-gout stone formers.

Main Methods:

  • Retrospective analysis of a stone registry.
  • Matched case-control study comparing gout patients with non-gout stone formers based on age, gender, and BMI.
  • Evaluation of 24-hour urinary metabolic panels and stone composition.
  • Consideration of medication use, particularly allopurinol.

Main Results:

  • Hyperoxaluria was more common in gout patients (74% vs. 61%).
  • Gout patients had a higher prevalence of uric acid stones (42.7% vs. 18.2%) and pure uric acid stones (52.2% vs. 22.3%).
  • Patients with gout on allopurinol showed a significant decrease in pure uric acid stones and an increase in calcium oxalate monohydrate stones.

Conclusions:

  • While uric acid stones are common in gout, a significant proportion (48%) have non-uric acid stones.
  • Allopurinol effectively alters stone composition in gout patients, leading to a pattern resembling that of non-gout stone formers.