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Related Concept Videos

Urinary Tract Calculi III: Medical Management01:30

Urinary Tract Calculi III: Medical Management

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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)...
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Urinary Tract Calculi V: Nursing Management01:28

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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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Urinary Tract Calculi VI: Surgical Management01:25

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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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Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

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IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...
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Urinary Tract Calculi IV: Nutrition Therapy and Prevention01:27

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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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Imaging Studies II: Ultrasonography01:24

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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...
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Author Spotlight: Developing a Bedside Protocol for Kidney and Genitourinary Ultrasonography
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Can ureteric stone impaction be predicted preoperatively using noninvasive parameters? A prospective study.

Mohamed Samir1, Mohamed Rafik Elhalaby1, Amr Moustafa Nasef2

  • 1Urology, Ain Shams University Hospitals, Cairo, Egypt.

Arab Journal of Urology
|January 9, 2026
PubMed
Summary
This summary is machine-generated.

Ureteral wall thickness (UWT) on non-contrast computed tomography (NCCT) effectively predicts ureteric stone impaction. This finding aids in preoperative assessment for kidney stone management.

Keywords:
CRPESRNCCTStone impactionUWTUreteroscope

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Area of Science:

  • Urology
  • Radiology
  • Nephrology

Background:

  • Ureteric stones are a common cause of renal colic.
  • Preoperative identification of impacted ureteric stones is crucial for treatment planning.

Purpose of the Study:

  • To evaluate non-contrast computed tomography (NCCT) parameters and acute phase markers for predicting ureteric stone impaction.
  • To identify reliable preoperative indicators for impacted ureteric stones.

Main Methods:

  • A study involving 70 patients undergoing ureteroscopy (URS) for ureteric stones.
  • Analysis of NCCT parameters and acute phase reactants (ESR, CRP) in impacted versus non-impacted stone groups.
  • Statistical analysis including univariate, multivariate, and ROC curve analyses.

Main Results:

  • Univariate analysis identified stone volume, location, hydronephrosis grade, and ureteral wall thickness (UWT) as predictors of impaction.
  • Multivariate analysis did not find a significant association between stone volume and impaction.
  • UWT showed excellent predictive value for impaction (82.9% accuracy) with a cutoff of 1.9 mm.

Conclusions:

  • Stone location, hydronephrosis grade, and UWT are significant preoperative predictors of ureteric stone impaction.
  • UWT is a highly accurate imaging biomarker for identifying impacted ureteric stones.