Are uric acid stones visible on CT?

Pure uric acid calculi are radiolucent on radiography but can be readily identified on CT. The relatively low attenuation (< 500 HU) of uric acid calculi on CT should be highly suggestive of their composition [19].

What is ureteral steinstrasse?

Steinstrasse, the accumulation of ureteric stone fragments causing a ureteric blockage, mostly occurs after treatment for renal stones (by surgery or shock wave lithotripsy – SWL) and is often transient and asymptomatic.

How is ureteral stone detected?

Substances that may cause stones to form can be detected with blood and urine tests. A urinary CT scan also may be recommended. In some cases, an intravenous pyelogram (IVP), a diagnostic that uses iodine as a contrast agent with X-rays is used to diagnose ureter stones.

How do you treat steinstrasse?

Introduction: Extracorporeal shock wave lithotripsy (SWL) is an essential treatment for urinary calculi, but Post-SWL steinstrasse is a potential complication, especially in large-burden calculi. Our purpose was to evaluate the efficacy of transureteral lithotripsy (TUL) in the treatment of steinstrasse caused by SWL.

Can a CAT scan miss a kidney stone?

2. Computed Tomography (CT) Scan for Kidney Stones. A CT scan for kidney stones can detect tiny pieces that other imaging tests might miss.

Is kidney stone and urine stone same?

Urinary tract stones begin to form in a kidney and may enlarge in a ureter or the bladder. Depending on where a stone is located, it may be called a kidney stone, ureteral stone, or bladder stone. The process of stone formation is called urolithiasis, renal lithiasis, or nephrolithiasis.

What is a Brushite stone?

Brushite is a unique form of calcium phosphate kidney stone that often has sub-optimal stone fragmentation with shock wave lithotripsy (Heimbach et al, 1999). Due to its SWL resistance, brushite patients often undergo more invasive treatments such as URS or PNL to achieve a stone free status.

How do you treat struvite stones?

Since struvite stones are caused by bacteria, doctors may use a mixture of antibiotics and surgery to remove the stones and kill the bacteria creating them. Surgical methods include shock wave lithotripsy (SWL) or percutaneous nephrolithotomy or nephrolithotripsy.

Does ureter stone cause pain?

The most common symptom of a kidney or ureter stone is pain. You might feel pain in your lower abdomen or your flank, which is the area of your back just under your ribs. The pain can be mild and dull, or it can be excruciating. The pain may also come and go and radiate to other areas.

What is Steinstrasse ureter?

Steinstrasse was the German term coined to describe the appearance of multiple ureterolithiasis observed as a complication of extracorporeal shock wave lithotripsy (ESWL) treatment in the late 1980s. Following fragmentation of a stone by ESWL, fragments passing down the ureter can stagnate leading to an accumulation of stones proximally.

What does Steinstrasse stand for?

Steinstrasse [stīn′shtra-se] is the German word for “stone street”, describing a possible complication of extracorporeal shock wave lithotripsy (ESWL) for urinary tract calculi, wherein a column of stone fragments forms that blocks the ureter.

What are the different types of Steinstrasse?

Steinstrasse is grouped into three types: type 1, multiple small fragments; type 2, a distal large fragment of >5 mm obstructing proximal small fragments; and type 3, multiple large fragments [ 3 ]. Conservative management of steinstrasse is successful ~50% of the time, however, only 10% of these patients have type 2 or 3 steinstrasse [ 3 ].

How are obstructing kidney stones seen on a CT scan?

These stones are clearly visible using this imaging modality. Additional anatomical detail can be obtained by reconstructing the images in an axial plane. a| This coronal CT image clearly demonstrates a left-sided obstructing stone.