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Related Concept Videos

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 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 III: Medical Management01:30

Urinary Tract Calculi III: Medical Management

404
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)...
404
Urinary Tract Calculi IV: Nutrition Therapy and Prevention01:27

Urinary Tract Calculi IV: Nutrition Therapy and Prevention

767
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,...
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Urinary Tract Calculi V: Nursing Management01:28

Urinary Tract Calculi V: Nursing Management

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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...
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Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

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IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
925

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Related Experiment Video

Updated: May 6, 2026

Cytosolic Calcium Measurements in Renal Epithelial Cells by Flow Cytometry
10:24

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Published on: October 28, 2014

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Urinary saturation measurements in calcium nephrolithiasis.

D V Weber, F L Coe, J H Parks

    Annals of Internal Medicine
    |February 1, 1979
    PubMed
    Summary

    Directly measuring urine saturation for calcium oxalate monohydrate stones identified oversaturated urine in some normocalciuric patients, who may benefit from treatment.

    Area of Science:

    • Nephrology
    • Urology
    • Biochemistry

    Background:

    • Calcium oxalate nephrolithiasis is a common condition.
    • Conventional metabolic evaluation may not fully capture urine saturation.
    • Accurate assessment of urine saturation is crucial for treatment.

    Purpose of the Study:

    • To evaluate urinary saturation with respect to calcium oxalate monohydrate in patients with calcium nephrolithiasis.
    • To compare urine saturation levels in patients with idiopathic hypercalciuria and normocalciuric patients.
    • To determine if direct urine saturation measurements can identify patients who benefit from treatment.

    Main Methods:

    • Measured urinary saturation for calcium oxalate monohydrate in 111 patients with calcium nephrolithiasis.
    • Conducted detailed conventional metabolic evaluations for each patient.

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  • Assessed the impact of thiazide treatment on urine saturation levels.

    • Main Results:

    • Patients with idiopathic hypercalciuria frequently had oversaturated urine.
    • Normocalciuric patients unexpectedly showed high urine saturation levels.
    • Direct urine saturation measurements identified normocalciuric patients with marked oversaturation who benefited from treatment.

    Conclusions:

    • Direct urine saturation measurement is valuable for identifying oversaturated urine in normocalciuric patients.
    • This method can detect a subset of patients who may benefit from therapeutic interventions.
    • Conventional metabolic protocols may underestimate the risk of calcium oxalate stone recurrence in some individuals.