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Related Concept Videos

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations01:26

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

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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...
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Urinary Tract Calculi I: Introduction01:28

Urinary Tract Calculi I: Introduction

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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...
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Urinary Tract Calculi III: Medical Management01:30

Urinary Tract Calculi III: Medical Management

329
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)...
329
Urinary Tract Calculi IV: Nutrition Therapy and Prevention01:27

Urinary Tract Calculi IV: Nutrition Therapy and Prevention

660
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,...
660
Urinary Tract Calculi V: Nursing Management01:28

Urinary Tract Calculi V: Nursing Management

428
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...
428
Urinary Tract Calculi VI: Surgical Management01:25

Urinary Tract Calculi VI: Surgical Management

850
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...
850

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Updated: Apr 7, 2026

Estimation of Urinary Nanocrystals in Humans using Calcium Fluorophore Labeling and Nanoparticle Tracking Analysis
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Calcium Phosphate Nephrolithiasis: A Comprehensive Review.

Peihsuan Tsai1,2, Naim M Maalouf1,3

  • 1Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX.

Kidney Medicine
|April 6, 2026
PubMed
Summary
This summary is machine-generated.

Calcium phosphate (CaP) kidney stones are common, particularly in women, and recur frequently. Current treatments are often inadequate, highlighting a need for CaP-specific therapies.

Keywords:
Brushitecalcium phosphatecitratehydroxyapatitehydroxycitratekidney stonesnephrolithiasispH

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Area of Science:

  • Nephrology
  • Urology
  • Mineral Metabolism

Background:

  • Calcium phosphate (CaP) kidney stones are the second most prevalent type of kidney stone.
  • CaP stones disproportionately affect women and show increasing prevalence and recurrence rates compared to calcium oxalate stones.
  • Distinct histopathologic findings are observed in hydroxyapatite and brushite stone formers, the primary CaP subtypes.

Purpose of the Study:

  • To review the current epidemiology, pathophysiology, and management challenges of CaP kidney stones.
  • To emphasize the unique characteristics of CaP stones that necessitate specialized treatment approaches.
  • To identify the critical need for tailored therapies for CaP nephrolithiasis.

Main Methods:

  • Review of recent epidemiological data on CaP stone formation.
  • Analysis of the unique pathophysiological mechanisms underlying CaP stone development.
  • Evaluation of current medical management strategies and their limitations.

Main Results:

  • CaP stones exhibit higher prevalence in women and increased recurrence rates.
  • Key urinary risk factors include high urine pH, hypercalciuria, and hypocitraturia.
  • Existing management strategies are often extrapolated from calcium oxalate stone treatment, with controversial efficacy of alkali therapy for CaP stones.

Conclusions:

  • There is a significant unmet need for treatments specifically designed for CaP kidney stones.
  • Understanding the distinct pathophysiology and risk factors is crucial for developing effective CaP stone management.
  • Further research is required to establish CaP-specific therapeutic guidelines to reduce high recurrence rates.