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Related Concept Videos

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...
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 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 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)...
Kidney Transplant II: Surgical Procedure01:26

Kidney Transplant II: Surgical Procedure

Preoperative ManagementThe primary goals of preoperative management in kidney transplantation are to optimize the patient’s metabolic state and prepare them for surgery through diet adjustments, necessary dialysis, and tailored medical treatment. This phase also involves comprehensive infection screening and patient education about the surgical procedure and postoperative care to improve outcomes and adherence.Medical ManagementA comprehensive evaluation is required for both the living donor...
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...

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Related Experiment Video

Updated: Jul 6, 2026

A Two-Step Method for Percutaneous Transhepatic Choledochoscopic Lithotomy
03:56

A Two-Step Method for Percutaneous Transhepatic Choledochoscopic Lithotomy

Published on: September 13, 2022

Nephrolithiasis after bariatric surgery for obesity.

John C Lieske1, Rajiv Kumar, Maria L Collazo-Clavell

  • 1Department of Internal Medicine, Mayo Clinic College of Medicine Rochester, MN 55905, USA. Lieske.John@mayo.edu

Seminars in Nephrology
|March 25, 2008
PubMed
Summary

Roux-en-Y gastric bypass (RYGB) can lead to kidney stones due to hyperoxaluria. Further research is needed to understand the causes and develop better treatments for this common bariatric surgery complication.

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Last Updated: Jul 6, 2026

A Two-Step Method for Percutaneous Transhepatic Choledochoscopic Lithotomy
03:56

A Two-Step Method for Percutaneous Transhepatic Choledochoscopic Lithotomy

Published on: September 13, 2022

Area of Science:

  • Nephrology
  • Bariatric Surgery
  • Gastroenterology

Background:

  • Bariatric surgery, particularly Roux-en-Y gastric bypass (RYGB), is an effective treatment for severe obesity and associated comorbidities.
  • While RYGB offers significant weight loss and improved mortality, nephrolithiasis (kidney stones) is an emerging complication.
  • Hyperoxaluria is identified as a primary risk factor for kidney stone formation post-RYGB.

Purpose of the Study:

  • To investigate the incidence and etiology of nephrolithiasis after Roux-en-Y gastric bypass.
  • To identify key urinary risk factors, including hyperoxaluria, low urine volume, and citrate levels, in the post-RYGB population.
  • To explore potential links between subclinical fat malabsorption and the development of hyperoxaluria.

Main Methods:

  • Review of existing literature on bariatric surgery outcomes and nephrolithiasis.
  • Analysis of urinary parameters in patients following RYGB.
  • Investigation into potential contributing factors such as dietary intake and gastrointestinal function.

Main Results:

  • Nephrolithiasis is an increasingly recognized complication following RYGB.
  • Hyperoxaluria is a significant risk factor, potentially exacerbated by low urine volume and citrate concentrations.
  • The precise cause of hyperoxaluria remains unclear, with fat malabsorption being a suspected contributor.

Conclusions:

  • RYGB patients are at risk for kidney stones, primarily due to hyperoxaluria.
  • Further research is essential to elucidate the etiology of hyperoxaluria and establish effective preventative and therapeutic strategies.
  • Current management recommendations, including dietary modifications and calcium supplementation, may require re-evaluation.