Related Experiment Video
Updated: May 19, 2026
06:04
Surgical Treatment for Benign Prostatic Hyperplasia: Holmium Laser Enucleation of the Prostate (HoLEP).
Published on: March 6, 2018
Single-session ureteroscopy with holmium laser lithotripsy for multiple stones
Ryoji Takazawa1, Sachi Kitayama, Toshihiko Tsujii
1Department of Urology, Tokyo Metropolitan Ohtsuka Hospital, Tokyo, Japan. r-tauro-o@ohtsuka-hospital.toshima.tokyo.jp
Summary
Single-session ureteroscopy effectively treats multiple kidney stones, achieving an 80% stone-free rate. Lower stone burden (<20 mm) significantly improves outcomes for this urolithiasis treatment.
Area of Science:
- Urology
- Endourology
- Nephrolithiasis Management
Background:
- Multiple stones occur in 20-25% of urolithiasis patients.
- Stone multiplicity negatively impacts shockwave lithotripsy outcomes.
- Established guidelines for treating multiple stones are lacking.
Purpose of the Study:
- To evaluate the efficacy of single-session ureteroscopy for multiple stones.
- To identify factors influencing treatment success in these patients.
- To assess operative time, stone-free rates, and complications.
Main Methods:
- Retrospective analysis of 51 patients with multiple stones (146 total stones).
- Procedures performed between September 2008 and December 2011.
- Evaluation of stone-free status, operative time, and complications post-ureteroscopy.
Main Results:
- Overall single-session stone-free rate was 80% (41/51).
- Stone-free rates were 92% for stone burden <20 mm and 69% for ≥20 mm.
- Stone burden and impacted stones significantly influenced outcomes; location did not.
Conclusions:
- Ureteroscopy is an efficient treatment for multiple urolithiasis.
- Single-session ureteroscopy is a favorable option for patients with stone burden <20 mm.
- Further research may refine treatment strategies for complex stone burdens.
Related Concept Videos
01:25Urinary 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...
01:30Urinary 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)...
01:28Urologic Endoscopic Procedure: Cystoscopic Examination
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...
01:22Imaging Studies V: Intravenous Urography and Retrograde Pyelography
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...
01:28Urinary 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...
01:24Imaging Studies II: Ultrasonography
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...