Ureteric Orifices
Ureteric Orifices - Related Videos
14:05
A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction
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Cited by 47 •
2014
The murine model of irreversible unilateral ureteric obstruction (UUO) is presented together with the model of reversible UUO in which the ureteric obstruction is relieved by anastomosis of the severed ureter into the bladder. These models enable the study of renal inflammation and scarring as well as tissue remodeling.
02:19
Unilateral Ureteral Obstruction Murine Model: A Surgical Procedure to Obstruct the Urinary Flow from a Kidney in Mouse Models
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2023
This video demonstrates the procedure to generate a unilateral ureteral obstruction mouse model. The procedure involves cutting one of the ureters of the mouse to obstruct urine flow.
06:37
An Immature Murine Model of Reversible Unilateral Ureteral Obstruction
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2025
The present protocol describes a step-by-step, reproducible model of unilateral ureteral obstruction.
04:37
Unilateral Ureteral Obstruction Model for Investigating Kidney Interstitial Fibrosis
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Cited by 1 •
2025
This protocol describes a method for inducing unilateral ureteral obstruction (UUO) in mice to study the progression of tissue fibrosis in obstructive nephropathy. It includes surgical procedures, post-operative care, and methods for fibrosis assessment.
08:26
Clinical Application of Single-Surgeon, Three-Port, Laparoscopic Resection for Colorectal Cancer with Natural Orifice Specimen Extraction
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Cited by 1 •
2023
Here, we present a protocol to successfully perform single-surgeon, three-port, laparoscopic resection for colorectal cancer with natural orifice specimen extraction.
FAQs
The oblique course of each ureter through the bladder wall creates a pressure-sensitive entry point. As the bladder fills, its wall compresses the intramural segment, helping limit urine from moving backward toward the kidneys. This arrangement links bladder distension with directional urine flow and explains why the passage through the wall is central to anti-reflux function.
When closure is impaired, urine may move backward from the bladder toward the kidneys instead of remaining directed into the bladder. This condition is associated with vesicoureteral reflux and can contribute to recurrent urinary infections. Assessing closure therefore helps relate lower urinary tract anatomy to potential effects on urinary flow and upper urinary tract protection.
Abnormal narrowing, displacement, or reduced patency can interfere with the normal relationship between the ureters and bladder. Such changes may contribute to obstruction, impaired urine passage, or reflux, depending on the abnormality. Their identification is important because even small positional or structural differences can alter how urine enters or leaves the lower urinary tract.
Examination focuses on the position, appearance, and patency of each opening. Position helps identify the normal landmarks of the bladder trigone, appearance may reveal visible abnormalities, and patency indicates whether urine can pass through the opening. Together, these observations provide a structured way to assess lower urinary tract anatomy during study or cystoscopy.
Their location within the bladder trigone provides a recognizable anatomical reference during urinary tract surgery. Surgeons can assess the openings for displacement, narrowing, or impaired patency when evaluating the urinary tract. Because abnormalities may be linked with reflux or obstruction, these landmarks also support diagnostic assessment and inform treatment of related urinary tract problems.
The openings help maintain directed urine flow from the ureters into the bladder. If their closure is impaired or their structure is abnormal, reflux or obstruction may develop, and these disturbances can contribute to recurrent urinary infections. Their examination therefore connects a specific bladder landmark with broader clinical questions about urinary drainage and infection risk.