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Related Concept Videos

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

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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...
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

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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...
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...
Urologic Endoscopic Procedure: Cystoscopic Examination01:28

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Meaning of Cystoscopic Examination:Cystoscopy is an essential diagnostic tool in urology that is used to assess the structure and function of the genitourinary system. It provides a direct view of the urethra, bladder, and, in some cases, the ureteral openings. This procedure helps detect structural abnormalities, infections, cancers, and blockages in the urinary tract. There are two types of cystoscopy:Flexible cystoscopy is commonly performed in outpatient settings due to its less invasive...

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Technical Modification of the Terminal Ureter During Total Transperitoneal Laparoscopic Nephroureterectomy for Upper Urinary Tract Urothelial Carcinoma
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Ureteroscopy for symptomatic hydrocalices: a case series.

Kathleen Kieran1, Caleb P Nelson, J Stuart Wolf

  • 1Department of Urology, University of Michigan, Ann Arbor, Michigan 48109-0330, USA.

Journal of Endourology
|July 1, 2006
PubMed
Summary

This case series explores ureteroscopy as a treatment for hydrocalix, a rare kidney condition. The study involved 12 procedures in 10 patients. Most procedures reached the affected area successfully, but only about half led to symptom relief. Different dilation methods were used, including laser and balloon techniques. Some patients needed additional treatment later. The authors suggest ureteroscopy is a reasonable option for patients who want to avoid more invasive surgery. However, they note that symptom relief is not guaranteed.

Keywords:
ureteroscopy outcomeshydrocalix treatmentendourology procedurespercutaneous dilation alternatives

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Area of Science:

  • Urology clinical outcomes research
  • Endourology procedural techniques
  • Renal anatomy and obstructive uropathy

Background:

Hydrocalix remains a rare anatomical variant with limited procedural data. Established treatment involves percutaneous dilation of the stenotic infundibulum. Prior research has shown that percutaneous approaches yield high technical success rates. No prior work had resolved the effectiveness of ureteroscopy for this condition. This gap motivated exploration of less invasive alternatives. Ureteroscopy is known to minimize surgical trauma in similar contexts. However, its role in hydrocalix remains unclear. This paper contributes new procedural data from a small case series.

Purpose Of The Study:

The aim was to evaluate ureteroscopy as a treatment for hydrocalix. Hydrocalix often causes persistent symptoms despite percutaneous dilation. Ureteroscopy offers a less invasive alternative but lacks sufficient evidence. This study sought to assess both technical and symptomatic outcomes. The specific problem is the lack of procedural success rates for ureteroscopy in this condition. The motivation stems from patient preference for less invasive options. No prior work had resolved the feasibility of ureteroscopic access. This paper contributes to procedural decision-making for urologists.

Main Methods:

The study involved 12 retrograde ureteroscopies in 10 patients with hydrocalix. Access was attempted using standard ureteroscopic techniques. Laser, balloon dilation, and cautery were used as dilation methods. Technical success was defined as reaching the hydrocalix. Symptomatic success was tracked through follow-up. Imaging and clinical records were reviewed for outcomes. No prior work had resolved the optimal dilation method. The study focused on procedural outcomes and patient follow-up.

Main Results:

Technical success was achieved in 11 of 12 procedures. One patient could not be accessed retrogradely. Laser dilation was used in eight cases, balloon in two, and cautery in one. Four of seven stone-bearing hydrocalices became stone-free. Six procedures resulted in immediate symptomatic success. Five patients experienced symptom recurrence. Three required additional treatment, including percutaneous approaches. One patient opted against further treatment despite stenosis recurrence.

Conclusions:

Ureteroscopy achieved technical success in most patients with hydrocalix. Symptomatic success followed only about half of the procedures. The authors suggest ureteroscopy is a reasonable option for patients seeking less invasive treatment. No prior work had resolved the long-term efficacy of ureteroscopic dilation. The study shows that ureteroscopy does not preclude subsequent percutaneous treatment. The authors propose that ureteroscopy may be suitable for selected patients. The findings suggest that procedural success does not always translate to symptom resolution. The authors emphasize the need for patient-specific procedural planning.

Ureteroscopy achieved technical success in 11 of 12 procedures but provided symptomatic relief in only about half of the cases.

Laser dilation was used in eight cases, balloon dilation with cautery in two, and cautery alone in one.

The authors suggest anatomical challenges may have prevented retrograde access in one patient.

Of seven hydrocalices with stones, four were rendered stone-free after ureteroscopic treatment.

Three of six symptomatic successes remained symptom-free at a mean follow-up of 25 months.

The authors propose that ureteroscopy does not preclude subsequent success with percutaneous treatment.