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MinorTrial status: Recruiting to Active, Not Recruiting
Site details revised
v30
MinorStudy site revisedv29
Minor2 versionsRe-verified since Jul 30, 2020, no change to tracked fieldsv27-v28
NotablePrimary and study completion dates: Dec 2019 to Dec 2025v26
NotableEnrollment target: 400 to 600v25
Show 23 earlier versionsHide 23 earlier versions
MinorSite contact updatedv24
NotablePrimary and study completion dates: Dec 2018 to Dec 2019v23
NotablePrimary and study completion dates: Dec 2016 to Dec 2018v22
MinorRe-verified, no change to tracked fieldsv21
NotablePrimary and study completion dates: Dec 2015 to Dec 2016v20
Minor3 versionsRe-verified since Jun 23, 2014, no change to tracked fieldsv17-v19
NotablePrimary and study completion dates: Dec 2014 to Dec 2015v16
NotablePrimary completion date: Dec 2012 to Dec 2014v15
NotableEnrollment target: 200 to 400
Study site revised
v14
MinorSite contact updatedv13
NotablePrimary completion date: Dec 2009 to Dec 2012
Study completion date: Dec 2010 to Dec 2014
v12
Minor2 versionsRe-verified since Jan 27, 2009, no change to tracked fieldsv10-v11
MinorPrimary completion date: Dec 2009
Study completion date: Jun 2009 to Dec 2010
v9
NotablePhase: Not specified to Not applicablev8Show 5 more changesShow less
Primary endpoint revised
Enrollment target: 155 to 200
Study completion date: Jun 2007 to Jun 2009
Eligibility criteria expanded, about 7 words
Study description shortened, about 181 words
MinorSite contact updatedv7
MinorStudy completion date: Jun 2006 to Jun 2007v6
MinorStudy completion date: Jun 2006
Site contact updated
v5
NotablePhase: Not applicable to Not specified
Study description expanded, about 7 words
Eligibility criteria shortened, about 1 word
Study title expanded, about 5 words
v4
MinorEligibility criteria revisedv3
MinorStudy description revisedv2
MinorStudy First Submitted
Stopped: an ongoing trial was terminated, suspended or withdrawn.
Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
Minor: routine progress and housekeeping, such as sites added or enrollment closed.
Kidney stones are very common. They affect 3-5% of the population in the United States. Many people are hospitalized for the treatment of kidney stones and some may die. Better understanding of what causes kidney stones is useful in both the treatment and prevention of kidney stones. However, exactly what causes kidney stones is unknown.
The most common type of kidney stones contains calcium, which sometimes is attached to a part of the kidney important in producing the final urine, called the papilla. The investigators have noticed that persons who form kidney stones seem to have more papilla with stones attached. They propose to study these areas of the papilla, called Randall's plaques (named after their discoverer), in patients undergoing surgery for kidney stones.