Working… Menu

Study of Tomography of Nephrolithiasis Evaluation (STONE)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01451931
Recruitment Status : Completed
First Posted : October 14, 2011
Results First Posted : December 3, 2014
Last Update Posted : December 3, 2014
Information provided by (Responsible Party):
University of California, San Francisco

Brief Summary:
This is a multi-center, randomized controlled trial of ultrasonography (ultrasound) compared to computed tomography (CT) for the initial emergency room evaluation of patients with suspected renal colic. The investigators will compare several measures of effectiveness including morbidity related to the patient's underlying disease, or complications related to delayed diagnosis, patient status regarding pain/missed days of work, and utilization of health care resources based on one of three study arms: ultrasound in the Emergency Department, ultrasound in Radiology or CT.

Condition or disease Intervention/treatment Phase
Urolithiasis Other: Point-of-care Ultrasound Radiation: Radiology Ultrasound Other: Radiology CT Phase 4

Detailed Description:
This is a multi-center, randomized controlled trial of ultrasonography compared with computed tomography (CT) for the evaluation of patients with suspected urolithiasis. The study will be conducted at 15 large urban Emergency Departments (EDs), reflecting geographic, socioeconomic, racial and ethnic diversity, and include academic medical centers as well as safety net hospitals. The patients will be randomized to one of three arms: 1) ultrasound in the Emergency Department (ED), 2) ultrasound in radiology or 3) CT in radiology. The investigators will then collect precise and unbiased data on a comprehensive range of outcomes that will allow assessment of effectiveness, safety, accuracy and cost between patients randomized to one the three groups. Taken together, these measures are intended to provide the basis for a valid comparison of imaging of patients with suspected urolithiasis seen in the ED. The results of this trial could lead to a change in clinical practice that is associated with both improved patient outcomes and reduced cost. Broad stakeholder involvement from within radiology, emergency medicine and several subspecialty communities has been sought to ensure the strategic completion of study aims and to help rapidly disseminate the results of the study into clinical practice. This will create a collaborative network of EDs willing to act as a laboratory for studying the comparative effectiveness of diagnostic testing. As a result, the proposed trial will demonstrate the feasibility of conducting Randomized Control Trials (RCTs) of imaging that incorporates measurements of outcomes that can be expanded to additional imaging tests in the future.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 2776 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Randomized Controlled Trial of Ultrasound Versus CT (Computed Tomography) for Patients in the Emergency Department With Suspected Renal Colic
Study Start Date : September 2011
Actual Primary Completion Date : September 2013
Actual Study Completion Date : September 2013

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Ultrasound X-Rays
Drug Information available for: X-Rays

Arm Intervention/treatment
Experimental: Point-of-care Ultrasound
Patient with suspected urolithiasis will receive ultrasonography performed in the emergency department. Perform ultrasonography in the ED (physician).
Other: Point-of-care Ultrasound
Perform ultrasonography in the ED (physician).

Experimental: Radiology Ultrasound
Patient with suspected urolithiasis will receive diagnostic ultrasonography in the radiology department. Diagnostic ultrasound completed in the radiology department at time 0.
Radiation: Radiology Ultrasound
Diagnostic ultrasound completed in the radiology department at time 0.

Experimental: Radiology CT
Patient with suspected urolithiasis will receive computed tomography in the radiology department. Computed tomography of abdomen completed in the radiology department at time 0.
Other: Radiology CT
Computed tomography of abdomen completed in the radiology department at time 0.

Primary Outcome Measures :
  1. High Risk Diagnosis With Complication [ Time Frame: 30 days from baseline ]
    Missed or delayed diagnosis of appendicitis, pneumonia with sepsis, diverticulitis, abdominal aortic aneurysm with rupture, mesenteric ischemia with bowel perforation, renal infarction, stone with renal abscess, urosepsis/pyelonephritis with bacteremia, ovarian torsion with necrosis related to randomization and due to imaging modality.

  2. Cumulative Radiation Exposure [ Time Frame: Baseline plus 6 months post-baseline ]

Secondary Outcome Measures :
  1. ED Length of Stay [ Time Frame: Baseline visit excluding hospitalization ]
  2. Return Visits to ED or Hospital [ Time Frame: 6 months post-baseline ]
  3. Accuracy for Stones by Arm [ Time Frame: Up to 6 month follow-up for stone passage ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • men or women = or >18 but <76 years of age presenting with acute renal colic
  • Emergency department physician highly suspects a primary diagnosis of kidney stones (renal colic) or the patient requires imaging to rule out kidney stones.

Exclusion Criteria:

  • children < 18 years old
  • elderly patients > or = 76 years old
  • pregnancy or planning pregnancy
  • Morbid obesity (>285 pounds in men, >250 pounds in women)
  • patients with an acute abdomen, signs of sepsis, signs of alternate diagnosis (ie appendicitis, abdominal aortic aneurysm, pyelonephritis, kidney stones not suspected).
  • history of kidney problems (hemodialysis, kidney transplant, presence of only one kidney)

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01451931

Layout table for location information
United States, California
UCSF at Fresno
Fresno, California, United States, 93701
University of California, Davis
Sacramento, California, United States, 95817
University of California, San Francisco
San Francisco, California, United States, 94143
United States, Georgia
Grady Memorial Hospital
Atlanta, Georgia, United States, 30303
United States, Illinois
John H. Stroger Jr. Hospital of Cook County
Chicago, Illinois, United States, 60612
United States, Massachusetts
Massachusetts General Hospital
Boston, Massachusetts, United States, 02114
Beth Israel Deaconess Medical Center
Boston, Massachusetts, United States, 02215
United States, Minnesota
Hennepin County Medical Center
Minneapolis, Minnesota, United States, 55415
United States, Missouri
Washington University School of Medicine
St. Louis, Missouri, United States, 63130
United States, New York
Jacobi Medical Center
Bronx, New York, United States, 10461
United States, Oregon
Oregon Health and Science University
Portland, Oregon, United States, 97239
United States, Pennsylvania
Hospital of the University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
United States, Rhode Island
Rhode Island Hospital
Providence, Rhode Island, United States, 02903
United States, Texas
University of Texas Houston Medical Center
Houston, Texas, United States, 77026
United States, Utah
University of Utah
Salt Lake City, Utah, United States, 84132
Sponsors and Collaborators
University of California, San Francisco
Layout table for investigator information
Principal Investigator: Rebecca Smith-Bindman, MD University of California, San Francisco, Department of Radiology and Biomedical Imaging
Study Chair: Clifford Rosen, MD Professor of Medicine, Tufts University (Data Safety Monitoring Board Chair)

Layout table for additonal information
Responsible Party: University of California, San Francisco Identifier: NCT01451931     History of Changes
Other Study ID Numbers: RSB-1002670
First Posted: October 14, 2011    Key Record Dates
Results First Posted: December 3, 2014
Last Update Posted: December 3, 2014
Last Verified: December 2014
Keywords provided by University of California, San Francisco:
kidney stone
urinary tract infection
computed tomography
Additional relevant MeSH terms:
Layout table for MeSH terms
Urologic Diseases