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Ureters

Ureters

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...

Anatomy of the Genitourinary System I: Kidneys and Ureters

Anatomy of the Genitourinary System I: Kidneys and Ureters

The upper urinary system comprises two kidneys and two ureters, which are crucial in filtering blood and forming urine.KidneysLocation and Structure:The kidneys are two bean-shaped organs positioned behind the peritoneum on either side of the spine.Kidneys are between the 12th thoracic (T12) and the 3rd lumbar (L3) vertebrae.The position of the liver causes the right kidney to sit slightly lower than the left.Protective Layers:Each kidney is enveloped in a tough, fibrous membrane called the...

Anatomy of the Genitourinary System II: Bladder and Urethra

Anatomy of the Genitourinary System II: Bladder and Urethra

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...

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

Imaging 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...

Introduction to Urinary System

Introduction to Urinary System

The urinary system consists of two kidneys, two ureters, the urinary bladder, and the urethra.
The kidneys are bean-shaped organs located in the retroperitoneal space, on either side of the vertebral column, between the T12 and L3 vertebrae. They are partially protected by the rib cage and surrounded by perirenal fat, which provides cushioning. They are responsible for urine formation and play critical roles in regulating blood pressure, electrolyte levels, and hormone production. The ureters...

Urethra

Urethra

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.
The anatomy of the urethra differs between males and females. In females, the urethra is short, measuring about 3–4 cm in length, and opens anterior to the vaginal opening. In males, the urethra is longer and passes through the penis, serving dual purposes: expelling urine and ejaculating semen. The male urethra is...

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Related Experiment Video

Updated: Jun 21, 2026

A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction

A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction

Published on: December 20, 2014

Protect the ureters.

Jay A Redan¹, Steven D McCarus

¹Minimally Invasive General Surgery, Florida Hospital-Celebration Health, Celebration, Florida 34747, USA. Jay.Redan.MD@FLHOSP.ORG

JSLS : Journal of the Society of Laparoendoscopic Surgeons

|August 8, 2009

Summary

This summary is machine-generated.

Lighted ureteral stents effectively prevent ureteral injuries during complex pelvic surgeries. This procedure is cost-effective, reducing operative time and potential complications, making it a new standard of care.

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Technical Modification of the Terminal Ureter During Total Transperitoneal Laparoscopic Nephroureterectomy for Upper Urinary Tract Urothelial Carcinoma

Technical Modification of the Terminal Ureter During Total Transperitoneal Laparoscopic Nephroureterectomy for Upper Urinary Tract Urothelial Carcinoma

Published on: November 22, 2019

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Last Updated: Jun 21, 2026

A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction

A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction

Published on: December 20, 2014

Technical Modification of the Terminal Ureter During Total Transperitoneal Laparoscopic Nephroureterectomy for Upper Urinary Tract Urothelial Carcinoma

Technical Modification of the Terminal Ureter During Total Transperitoneal Laparoscopic Nephroureterectomy for Upper Urinary Tract Urothelial Carcinoma

Published on: November 22, 2019

Area of Science:

Urology
Gynecologic Surgery
Surgical Innovation

Background:

Complex pelvic surgeries carry a risk of ureteral injury.
Accurate intraoperative identification of ureters is crucial for patient safety.
Minimizing surgical complications is essential due to insurance and litigation concerns.

Purpose of the Study:

To evaluate the efficacy of preprocedure lighted ureteral stent placement in preventing ureteral injuries.
To assess the impact of lighted ureteral stents on operative efficiency and costs in complex pelvic surgeries.

Main Methods:

A prospective study involving 151 patients undergoing complex pelvic procedures.
Placement of lighted ureteral stents by general surgeons or gynecologists prior to surgery.
Documentation of ureteral injuries and operative times with and without stent use.

Main Results:

No ureteral injuries occurred in patients who had preprocedure lighted ureteral stent placement.
Stent placement was unsuccessful in 6 patients with undiagnosed preoperative ureteral pathology.
Potential operative time savings ranged from 0 to 45 minutes per procedure.

Conclusions:

Preprocedure lighted ureteral stent placement is a highly effective method for preventing ureteral injuries in complex pelvic surgery.
The procedure offers significant cost-benefit advantages by reducing operative time and complication-related expenses.
Lighted ureteral stent placement should be considered the standard of care for complex pelvic procedures.