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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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The urethra is a hollowed tubular organ through which urine is expelled from the body. This structure extends from the bladder to the external opening, allowing urine to be released.
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The ureters are retroperitoneal tubes located on either side of the vertebral column. They are responsible for transporting urine from each kidney to the urinary bladder. These tubes have thick walls and are approximately 25-30 cm long. Their diameter is around 10 mm at the renal pelvis, gradually narrowing to 1 mm as the ureter obliquely enters the posterior bladder wall through the ureteric orifices. The shape of these orifices is slit-like, which helps to prevent urine backflow toward the...
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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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Urinary Tract Calculi III: Medical Management01:30

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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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The lower urinary system consists of the urinary bladder and urethra, which are essential in storing and expelling urine from the body. Together with the internal and external sphincters, these structures work together to regulate urination effectively.Anatomy of the BladderThe urinary bladder is a muscular, stretchable organ behind the pubic bone and in front of the rectum. In females, the bladder is positioned anterior to the vagina and inferior to the uterus, while in males, it is located...
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Updated: Mar 13, 2026

Vessel-sparing Excision and Primary Anastomosis
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Update in urethral stents.

Z Bahouth1, G Meyer1, G Yildiz2

  • 1Department of Urology. Bnai-Zion Medical Center and Faculty of Medicine, Technion. Hafia. Israel.

Archivos Espanoles De Urologia
|October 12, 2016
PubMed
Summary
This summary is machine-generated.

Urethral stents, including Allium types, offer solutions for various urethral strictures and obstructions. Despite improvements, their adoption remains limited, highlighting a need for wider awareness and application in urology.

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Area of Science:

  • Urology
  • Medical Devices

Background:

  • Urethral stents, introduced in 1988, have seen advancements but limited global adoption.
  • Their use is concentrated in specialized centers, despite diverse applications across the entire urethra.

Purpose of the Study:

  • To provide an update on urethral stent technology.
  • To emphasize the applications and types of Allium urethral stents.

Main Methods:

  • Review of urethral stent applications.
  • Focus on experience with Allium urethral stents (bulbar, prostatic, bladder neck).

Main Results:

  • Urethral stents can treat anterior urethral strictures.
  • They address prostatic obstruction (benign, malignant, iatrogenic) and bladder neck contractures.
  • Allium stents represent a significant option for these indications.

Conclusions:

  • Urethral stents, particularly Allium types, are versatile for various urethral conditions.
  • Wider adoption could benefit more patients despite current limitations.