Kidney Stone Structural Analysis By Helical Computed Tomography (CT)

Completed

Conditions studied: Nephrolithiasis

In brief

Current practices of the diagnosis of urinary stones gives little information on the probable fragility of stones using shock wave lithotripsy (SWL), and many patients receive more SW's than is necessary to break up their stones. Indeed, some patients are treated with SWL when their stones cannot be fragmented using this technology. The investigators have ample evidence that computed tomography (CT) images of kidney stones can reveal significant internal structure in stones-structure that is likely to be useful in predicting stone fragility-but no one has explored the use of clinical helical CT for this purpose. Also, the investigators do not know the effect that the human body wall and kidney tissue will have on the resolution of kidney stone structure with helical CT.

Key facts

Study ID

NCT00169780

Run by

Indiana Kidney Stone Institute

People needed

7

Starts

2002-07-01

Expected to finish

2011-08-01

Last updated by the study team

2011-12-07

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• In order to be eligible, patients must meet the following inclusion criteria:
• Male and female kidney stone patients of IU Health Physicians Urology in Indianapolis, IN requiring a computed tomography scan prior to their stone surgical treatment (extracorporeal shock wave lithotripsy [ESWL], percutaneous nephrolithotomy, ureteroscopy)
• Eligible patients must be able to suspend respiration for at least 20 seconds. The patient will be asked to perform a respiration suspension test for 20 seconds before recruitment.

You may not qualify if…

• Women in whom the potential for pregnancy has not been excluded are not eligible. A pregnancy test will be performed if necessary.
• Inability to give informed consent
• A previous history of abdominal malignancy

Where it is running

• IU Health Methodist Hospital — Indianapolis, Indiana, United States

Full record on ClinicalTrials.gov

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