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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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Uroflowmetry is a non-invasive urodynamic test designed to measure various aspects of urination, including volume, flow rate, and the time to void. This test is crucial for diagnosing and assessing conditions such as bladder outlet obstruction, bladder dysfunction, incomplete bladder emptying, incontinence, and urinary tract blockages caused by benign prostatic hyperplasia (BPH) and urethral strictures.Pre-Test Instructions:Before a uroflowmetry test, patients are typically advised to drink...
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Voiding Cystourethrography (VCUG) and Cystography are specialized radiographic procedures used to examine the structure and function of the bladder and urethra.Voiding Cystourethrography (VCUG)A Voiding Cystourethrogram (VCUG) is a diagnostic imaging procedure that assesses the anatomy and function of the lower urinary tract. It focuses on the bladder, bladder neck, and urethra, helping detect abnormalities such as vesicoureteral reflux (VUR)—the backward or reverse flow of urine into the...
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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.
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Urination, or micturition involves the coordination of the bladder's detrusor muscle and two sphincters to ensure controlled bladder emptying.
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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.
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Related Experiment Video

Updated: Dec 26, 2025

Detrusor Underactivity Model in Rats by Conus Medullaris Transection
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Describing bladder storage function: overactive bladder syndrome and detrusor overactivity.

Paul Abrams1

  • 1Bristol Urological Institute, Southmead Hospital, Bristol, UK. edu@bui.ac.uk

Urology
|December 10, 2003
PubMed
Summary
This summary is machine-generated.

The International Continence Society (ICS) recommends new terms for lower urinary tract dysfunction: overactive bladder syndrome (OAB) for symptoms and detrusor overactivity for urodynamic findings. These terms aim for clearer patient-physician communication.

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Area of Science:

  • Urology
  • Continence Science

Background:

  • Established terminology for lower urinary tract dysfunction lacked clarity.
  • The International Continence Society (ICS) reviewed existing terms.

Purpose of the Study:

  • To introduce and define standardized terminology for lower urinary tract function and dysfunction.
  • To improve communication between patients and physicians regarding urologic issues.

Main Methods:

  • Comprehensive review of existing terminology.
  • Recommendations for new terms: overactive bladder syndrome (OAB) and detrusor overactivity.
  • Definition of detrusor overactivity based on urodynamic observations.

Main Results:

  • Detrusor overactivity is defined as involuntary detrusor contractions during bladder filling, categorized as idiopathic or neurogenic.
  • Overactive bladder syndrome (OAB) is a symptomatic diagnosis characterized by urgency, with or without urge incontinence, frequency, and nocturia.
  • OAB is often diagnosed empirically without urodynamic confirmation.

Conclusions:

  • The new ICS terms, OAB and detrusor overactivity, are intended to be more intuitive.
  • Standardized terminology is expected to enhance effective communication regarding urologic dysfunctions.
  • The ICS 2002 report provides specific definitions and classifications for these conditions.