Urethral Function
Urethral Function - Related Videos
07:42
Nerve-sparing Mid-urethral Obstruction (NeMO) in Female Small Rodents
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Cited by 7 •
2017
Traditional modeling of partial bladder outlet obstruction in rodents is fraught with animal mortality. A denervation injury from dissection around the proximal urethra and bladder neck is also of major concern. We developed and evaluated a safe and reliable mid-urethral obstruction model, avoiding the shortcomings of the traditional model.
05:09
Urethral Stricture Induction Followed by Buccal Mucosa Graft Urethroplasty in a Rat Model
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Cited by 3 •
2023
In the present protocol, a urethral stricture induction was developed in Wistar rats, followed by urethral reconstruction with a buccal mucosa graft. A retrograde urethrogram and laser Doppler assessment were performed, validating urethral reconstruction (after stricture formation) and graft placement.
03:25
Transcorporal Artificial Urinary Sphincter Cuff Placement in a Case Requiring Revision for Urethral Atrophy
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Cited by 2 •
2022
Here we describe the application of transcorporal artificial urethral sphincter (AUS) placement in a case requiring revision of an artificial urinary sphincter for urethral atrophy.
02:45
Functional Groups
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2020
Functional groups are a group of atoms with characteristic properties, which when linked to the carbon skeleton of a molecule, alter the properties of that molecule. For example, the presence of certain functional groups on a molecule will make them hydrophilic, whereas others will make them hydrophobic. These functional groups are an indispensable part of organic chemistry and important components of biological molecules, such as carbohydrates, proteins, lipids, and nucleic acids. Each...
07:31
A Computerized Functional Skills Assessment and Training Program Targeting Technology Based Everyday Functional Skills
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Cited by 9 •
2020
This training protocol uses computerized training to teach technology-related everyday functional skills. These skills include financial skills, travel and transit, as well as medication management.
FAQs
During urine storage, closure depends on coordinated activity at the bladder neck and urethral sphincters. Smooth muscle contributes at the bladder neck, while skeletal muscle supports sphincter control. This arrangement keeps the outlet closed as the bladder holds urine, so disruption of either muscle component can affect continence and help explain leakage or difficulty maintaining storage.
Voiding requires a coordinated switch rather than bladder contraction alone. The detrusor muscle contracts while the bladder neck and urethral sphincters relax, opening the outlet for urine passage. Autonomic pathways regulate the smooth-muscle components, whereas somatic pathways influence skeletal-muscle control. Studying this timing helps relate abnormal coordination to retention, obstruction, or impaired emptying.
Autonomic and somatic neural pathways contribute to different elements of outlet control. Autonomic regulation is associated with smooth muscle at the bladder neck, while somatic pathways influence skeletal-muscle activity in the urethral sphincters. Their coordinated action supports the transition between storage and voiding, making neural control important when investigating continence or elimination problems.
In males, the urethra participates in reproductive functions as well as urinary transport and release. This dual role means its biology cannot be interpreted solely through bladder emptying. Research on urethral function therefore considers both elimination and reproductive relevance, while recognizing that the same passage is associated with distinct physiological roles.
Urinary retention, incontinence, obstruction, and infection can be examined through changes involving coordinated outlet control and transport. Retention may indicate ineffective emptying, whereas incontinence reflects difficulty maintaining closure, although no single cause is assigned here. This physiological framework connects normal urethral activity with the evaluation of lower urinary tract disorders.
Urodynamic testing provides a clinical and research framework for examining lower urinary tract function during storage and voiding. In relation to urethral function, it can help investigate how bladder contraction and sphincter control are coordinated. Its relevance lies in supporting assessment of disorders such as urinary retention, incontinence, and obstruction without reducing evaluation to one muscle or pathway.
Pelvic-floor interventions are relevant because skeletal muscle contributes to urethral sphincter control. Their application is connected to continence-related outlet control rather than to changing bladder transport directly. Alongside urodynamic testing and other treatments for lower urinary tract disorders, these interventions place urethral coordination within a broader strategy for addressing problems with storage and release.