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Related Concept Videos

Disorders of the Urinary System01:20

Disorders of the Urinary System

266
The urinary system is responsible for eliminating waste and excess fluids from the body. However, disorders of the urinary system can arise due to various reasons like infections, stress, age, congenital abnormalities, and lifestyle.
Urinary tract infections (UTIs) are one of the most common urinary system disorders. They are caused by bacteria that enter the urethra and can spread to the bladder resulting in cystitis. Pyelonephritis is the result of a UTI that has ascended to the level of the...
266
Ureters01:22

Ureters

403
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...
403
The Micturition Reflex01:26

The Micturition Reflex

506
Urination, or micturition involves the coordination of the bladder's detrusor muscle and two sphincters to ensure controlled bladder emptying.
The process begins with bladder filling, where the bladder wall stretches as urine accumulates. This stretching activates the urine storage reflex, mediated by the sacral spinal segments and the pontine storage center. Efferent sympathetic impulses stimulate the detrusor muscle to relax and the internal urethral sphincter to contract, facilitating...
506
Urinary Bladder01:23

Urinary Bladder

487
The urinary bladder is a hollow, muscular sac that temporarily stores urine before it is expelled from the body. It can hold approximately 600 mL of urine prior to micturition. The bladder is retroperitoneal and located behind the pubic symphysis in the pelvic floor.
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...
487
Renal Corpuscle01:20

Renal Corpuscle

1.8K
The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous...
1.8K
Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

359
Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra....
359

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Related Experiment Video

Updated: Jun 14, 2025

Transcorporal Artificial Urinary Sphincter Cuff Placement in a Case Requiring Revision for Urethral Atrophy
03:25

Transcorporal Artificial Urinary Sphincter Cuff Placement in a Case Requiring Revision for Urethral Atrophy

Published on: June 16, 2022

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Urethral caruncle causes acute urinary retention.

Akifumi Katsu1, Masato Yanagi1, Norio Motoda2

  • 1Department of Urology Nippon Medical School Musashikosugi Hospital Kawasaki Kanagawa Japan.

IJU Case Reports
|September 3, 2024
PubMed
Summary
This summary is machine-generated.

A urethral caruncle caused urinary retention in an elderly woman. Surgical resection of the caruncle resolved the retention, allowing the patient to urinate normally post-operation.

Area of Science:

  • Urology
  • Geriatric Medicine

Background:

  • Urinary retention is a common concern in older women.
  • Urethral caruncles are benign growths at the urethral meatus, rarely causing significant symptoms.
Keywords:
inspection of urethral meatusurethral carcinomaurethral caruncleurinary retentionwomen

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