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Related Concept Videos

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 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 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 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 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: Jul 14, 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

Oxalate intake and the risk for nephrolithiasis.

Eric N Taylor1, Gary C Curhan

  • 1Channing Laboratory, Third Floor, Brigham and Women's Hospital, Boston, MA 02115, USA. entaylor@partners.org

Journal of the American Society of Nephrology : JASN
|June 1, 2007
PubMed
Summary

Dietary oxalate intake, particularly from spinach, showed a modest increased risk for kidney stones in men and older women. However, overall dietary oxalate is not a major risk factor for nephrolithiasis.

Area of Science:

  • Nephrology
  • Nutritional Science
  • Epidemiology

Background:

  • Calcium oxalate stones are the most common type of kidney stones.
  • Elevated urinary oxalate levels are a known risk factor for calcium oxalate nephrolithiasis.
  • The association between dietary oxalate intake and the risk of developing kidney stones remains unclear.

Purpose of the Study:

  • To prospectively investigate the relationship between dietary oxalate consumption and the incidence of kidney stones.
  • To analyze oxalate intake from various food sources, with a focus on spinach.
  • To assess potential modifying effects of dietary calcium on this relationship.

Main Methods:

  • Prospective cohort study involving three large groups: Health Professionals Follow-up Study (men), Nurses' Health Study I (older women), and Nurses' Health Study II (younger women).

Related Experiment Videos

Last Updated: Jul 14, 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

  • Dietary oxalate intake was assessed every four years using food frequency questionnaires.
  • Cox proportional hazards regression models were employed to adjust for confounding factors like age, BMI, and thiazide use.

    • Main Results:

    • A total of 4605 incident kidney stones were documented across the cohorts.
    • Mean daily oxalate intake was similar between stone formers and non-stone formers.
    • Higher dietary oxalate intake was associated with a modestly increased risk of kidney stones in men and older women, but not in younger women.
    • Consuming eight or more servings of spinach per month significantly increased stone risk in men and older women compared to those consuming less than one serving.

    Conclusions:

    • Dietary oxalate intake, especially from spinach, may contribute to kidney stone risk in certain populations (men and older women).
    • The study suggests that dietary oxalate is not a primary driver for nephrolithiasis overall.
    • Further research may be needed to understand the specific mechanisms and population-specific risks related to dietary oxalate.