Ureteral Stones
Ureteral Stones - 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.
01:15
Quarrying of Stone
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2024
Quarrying is the process of extracting stone from a quarry, where specialized techniques are employed to remove large blocks of stone safely and efficiently. This process can involve controlled explosions or more precision-oriented methods such as cutting and drilling. One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the block.
01:29
Stone Masonry
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2024
Stone masonry is a construction technique that uses individual stones to build structures and can be categorized into two main types: rubble and ashlar. Rubble masonry uses uneven, naturally shaped stones such as river rocks or fragments from quarries. This method often requires the mason to select and possibly shape each stone to fit the designated space, ensuring a proper build, even with irregular stone sizes and shapes. Ashlar masonry, on the other hand, employs uniformly cut stones that...
01:30
Types of Building Stone
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2024
Building stones, essential materials for construction, are extracted from natural rock deposits and processed into specific forms and dimensions suitable for various building applications. These stones are broadly classified into three types based on their geological formation: igneous, sedimentary, and metamorphic. Igneous rocks are formed from the solidification of magma or lava. An example is granite, known for its durability and resistance to weathering, making it ideal for parts of...
04:02
Laparoscopic Cholecystectomy with Indocyanine Green Fluorescence: Choledochoscopic Stone Extraction and Primary Duct Suture
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2025
The integrated technique described in this protocol achieves real-time biliary mapping via indocyanine green (ICG) fluorescence, minimally invasive stone clearance under direct visualization, and secure primary duct repair (6-0 PDS), eliminating T-tube drainage.
FAQs
When urine becomes supersaturated with stone-forming substances, the excess material can begin forming crystals. Continued crystal growth increases the mineral deposit’s size and raises the possibility that it will lodge within the ureter. This mechanism explains why urinary composition is central to the development and recurrence of ureteral stones.
A lodged stone can obstruct the normal movement of urine through the ureter, producing spasmodic pain as the urinary tract responds to the blockage. The same process may be associated with hematuria, meaning blood in the urine. Nausea and other urinary complications can accompany this obstructive episode.
Stone size and location are important because they help clinicians judge the extent of obstruction and select an appropriate management approach. These findings may support observation, medication to facilitate passage, or a procedure that fragments or removes the deposit. Imaging provides the information needed to make that distinction.
Evaluation combines the patient’s symptoms with urinalysis and imaging. Symptoms can indicate pain, hematuria, nausea, or urinary complications, while urinalysis contributes information about the urinary findings. Imaging identifies the stone’s size and location and helps determine whether urine flow is obstructed, guiding subsequent clinical management.
Observation and pain control may be appropriate when clinical assessment supports monitoring rather than immediate stone removal. Medication may be selected when the goal is to facilitate passage. The choice depends on findings such as stone size, location, and obstruction, which help clinicians balance spontaneous passage with the need for intervention.
Management ranges from conservative care to active intervention. Pain control addresses symptoms, while medications can facilitate passage. When necessary, procedures fragment or remove the stone. These approaches aim to restore urine flow and help prevent urinary infection, kidney damage, and recurrence associated with persistent or repeated obstruction.