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Related Concept Videos

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 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 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 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 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 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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Changing composition of staghorn calculi.

Davis P Viprakasit1, Mark D Sawyer, S Duke Herrell

  • 1Department of Urologic Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA.

The Journal of Urology
|October 22, 2011
PubMed
Summary

Metabolic stones are common in staghorn calculi, contrary to prior guidelines. Evaluating metabolic factors is crucial for managing these complex kidney stones and preventing recurrence.

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Area of Science:

  • Nephrology
  • Urology
  • Biochemistry

Background:

  • The 2005 American Urological Association Guideline suggests metabolic stones are uncommon in staghorn calculi.
  • Percutaneous nephrolithotomy (PCNL) is a key treatment for complete staghorn calculi.

Purpose of the Study:

  • To determine the incidence of metabolic vs. infection stones in complete staghorn calculi.
  • To compare treatment outcomes for metabolic and infection stones after PCNL.

Main Methods:

  • Retrospective analysis of PCNL patients for complete staghorn calculi (April 2005 - April 2010).
  • Classification of stones as infectious or metabolic based on stone analysis.
  • Comparison of perioperative characteristics and outcomes based on stone composition.

Main Results:

  • Metabolic stones constituted 56% of complete staghorn calculi, with calcium phosphate being the most common type.
  • Patients with metabolic stones were more likely male and had negative preoperative urinary cultures.
  • Metabolic stones were associated with lower complication rates and infection stones with higher recurrence rates.

Conclusions:

  • Metabolic stones are a significant component of complete staghorn calculi in contemporary patients.
  • Calcium phosphate is the predominant metabolic stone type in this cohort.
  • Stone analysis and metabolic evaluation are essential for managing staghorn calculi.