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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...
The Micturition Reflex01:26

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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...
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...
Urinary Bladder01:23

Urinary Bladder

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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...
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...

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Related Experiment Video

Updated: Jun 13, 2026

Optimizing Mouse Urodynamic Techniques for Improved Accuracy
06:46

Optimizing Mouse Urodynamic Techniques for Improved Accuracy

Published on: June 7, 2024

["Post micturition residual; urodynamic"].

S Méndez-Rubio1, L Chiarelli, J Salinas-Casado

  • 1Servicio de Urología, Hospital Clínico de San Carlos, Universidad Complutense de Madrid, Madrid, España. santiago.mendez@telefonica.net

Actas Urologicas Espanolas
|May 18, 2010
PubMed
Summary
This summary is machine-generated.

Postmicturition residual (PR) correlates with bladder capacity and detrusor contractility, not urinary obstruction. This finding suggests PR may indicate detrusor muscle function rather than lower urinary tract issues.

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Last Updated: Jun 13, 2026

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Area of Science:

  • Urology
  • Urodynamics
  • Lower Urinary Tract Function

Context:

  • Postmicturition residual (PR) is a common urodynamic finding.
  • Understanding PR's correlation with other urodynamic parameters is crucial for accurate diagnosis.
  • Previous studies have yielded mixed results on the significance of PR.

Purpose:

  • To investigate the correlation between postmicturition residual (PR) and various urodynamic parameters in men and women.
  • To determine if PR is more indicative of detrusor contractility or lower urinary tract obstruction.

Summary:

  • A retrospective study of 121 patients with significant PR undergoing videourodynamic studies found positive correlations between PR and bladder capacity (p=0.001).
  • In women, PR correlated positively with urethral resistance (URA) and voiding by abdominal pressure (p<0.05).
  • In men, PR showed a negative correlation with detrusor contraction parameters (W80-W20) (p<0.05), and no significant correlation with obstruction or symptoms.

Impact:

  • The findings suggest PR may be a better indicator of detrusor contractility than lower urinary tract obstruction.
  • This study refines the interpretation of PR in urodynamic assessments.
  • Results may influence diagnostic approaches and treatment strategies for patients with urinary retention.