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Related Concept Videos

Urodynamic Studies: Uroflowmetry01:19

Urodynamic Studies: Uroflowmetry

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...
Imaging Studies VI: Voiding Cystourethrography and Cystography01:22

Imaging Studies VI: Voiding Cystourethrography and Cystography

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...
The Micturition Reflex01:26

The Micturition Reflex

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 urine...
Urinary Bladder01:23

Urinary Bladder

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...
Anatomy of the Genitourinary System II: Bladder and Urethra01:19

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 II: Ultrasonography01:24

Imaging 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...

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Related Experiment Video

Updated: Jun 6, 2026

A Decentralized (Ex Vivo) Murine Bladder Model with the Detrusor Muscle Removed for Direct Access to the Suburothelium during Bladder Filling
06:36

A Decentralized (Ex Vivo) Murine Bladder Model with the Detrusor Muscle Removed for Direct Access to the Suburothelium during Bladder Filling

Published on: November 28, 2019

Postvoided Residual/Bladder Emptying: A Mini Review.

Cosimo De Nunzio1, Riccardo Lombardo1, Marcus J Drake2

  • 1Sapienza University of Rome, Rome, Italy.

European Urology Focus
|June 4, 2026
PubMed
Summary
This summary is machine-generated.

Postvoid residual (PVR) urine volume assesses bladder emptying but has limited diagnostic accuracy alone. It is valuable for monitoring treatment response in lower urinary tract symptoms (LUTS) and benign prostatic obstruction (BPO).

Keywords:
Detrusor overactivityDetrusor underactivityLower urinary tract symptomsPost voided residual

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Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models
10:19

Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models

Published on: August 9, 2012

Related Experiment Videos

Last Updated: Jun 6, 2026

A Decentralized (Ex Vivo) Murine Bladder Model with the Detrusor Muscle Removed for Direct Access to the Suburothelium during Bladder Filling
06:36

A Decentralized (Ex Vivo) Murine Bladder Model with the Detrusor Muscle Removed for Direct Access to the Suburothelium during Bladder Filling

Published on: November 28, 2019

Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models
10:19

Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models

Published on: August 9, 2012

Area of Science:

  • Urology
  • Nephrology
  • Geriatrics

Background:

  • Postvoid residual (PVR) urine volume is a common metric in evaluating lower urinary tract symptoms (LUTS) and benign prostatic obstruction (BPO).
  • The clinical utility and interpretation of PVR remain subjects of ongoing debate within the medical community.

Purpose of the Study:

  • To critically review the current evidence regarding the definition, pathophysiology, measurement techniques, and clinical significance of PVR.
  • To assess the diagnostic limitations and therapeutic monitoring capabilities of PVR in urological practice.

Main Methods:

  • Mini-review of existing scientific literature and clinical studies on PVR.
  • Critical appraisal of data concerning PVR's role in diagnosing and managing bladder emptying dysfunction.

Main Results:

  • PVR indicates impaired bladder emptying, influenced by factors like obstruction and detrusor underactivity.
  • PVR exhibits high variability and lacks standardized cutoffs, limiting its diagnostic accuracy for specific conditions.
  • The PVR ratio shows potential to overcome some diagnostic limitations.
  • PVR is clinically useful for monitoring treatment outcomes in medical and surgical interventions.

Conclusions:

  • PVR is best interpreted as a dynamic measure within a comprehensive clinical and urodynamic assessment.
  • While not a standalone diagnostic tool for LUTS/BPO causes, PVR aids in tracking treatment effectiveness.