- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00241826
Prospective Investigation of Pulmonary Embolism Diagnosis III
Prospective Investigation of Pulmonary Embolism Diagnosis III (PIOPED III)
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
BACKGROUND:
Prospective Investigation of Pulmonary Embolism Diagnosis III (PIOPED III) follows PIOPED I and PIOPED II. PIOPED I was a multicenter trial supported between 1983 and 1989 to evaluate the sensitivity and specificity of two major, widely used technologies, radionuclear imaging (ventilation-perfusion scanning) and pulmonary angiography, for the diagnosis of PE. PIOPED II was a multicenter trial conducted between 2000 and 2005 to determine the value of contrast-enhanced spiral computed tomography (spiral CT) for the diagnosis of acute PE.
In PIOPED II, among 7,284 patients with suspected acute PE, 18.6% had an elevated creatinine, 3.9% were allergic to iodinated contrast material, and 4.7% of women were pregnant. One or more of these relative contraindications to an imaging procedure that would expose the patient to ionizing radiation or iodinated contrast material was present in 24.4% of patients with suspected acute PE. Although patients with relative contraindications often take the risk of CT or digital subtraction angiography (DSA) because of the importance of having a definitive diagnosis, such patients could benefit from safer diagnostic testing with Gd-MRA/MRV if it is shown to be sufficiently accurate.
The purpose of this investigation is to determine the extent to which Gd-MRA/MRV can serve as a diagnostic test in patients with clinically suspected PE and thereby eliminate the need for iodinated contrast material or ionizing radiation in patients who have a relative contraindication to one of them. This is important because 24% of patients with suspected acute PE have a relative contraindication to diagnostic procedures that involve ionizing radiation or iodinated contrast material.
DESIGN NARRATIVE:
PIOPED III is a multicenter prospective investigation designed to determine the diagnostic accuracy of Gd-MRA of the pulmonary arteries in combination with MRV of the veins of the thighs in patients with clinically suspected acute PE. The diagnostic accuracy of Gd-MRA alone and in combination with MRV will be expressed as sensitivity, specificity, and likelihood ratio for positive and negative tests. The study design is a prospective study of consecutive patients incorporating standardized inclusion/exclusion criteria, complete ascertainment of patient characteristics and outcomes, uniform diagnostic criteria, and unbiased paired central readings of imaging studies. Over a period of 2 years, 1,256 patients with suspected acute PE will be recruited at clinical centers. Composite reference standards will be used to diagnose venous thromboembolism (VTE) and exclude PE. It is expected that 314 patients will have acute VTE and they will undergo Gd-MRA/MRV. It is expected that 942 patients will be shown not to have PE. From among this group, 314 patients will be randomly selected for the index test, Gd-MRA/MRV.
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Locations
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Alberta
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Calgary, Alberta, Canada, T2N 2T9
- Foothills Hospital
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Georgia
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Atlanta, Georgia, United States, 30308
- Emory University
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Maryland
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Bethesda, Maryland, United States, 20892
- Divison of Lung Diseases, NHLBI
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Rockville, Maryland, United States, 20852
- Data Coordinating Center
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Massachusetts
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Boston, Massachusetts, United States, 02114
- Massachusetts General Hospital
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Michigan
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Ann Arbor, Michigan, United States, 48109
- University of Michigan Medical Center
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Pontiac, Michigan, United States, 48341
- St. Joseph Mercy-Oakland
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Missouri
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St. Louis, Missouri, United States, 63110
- Washington University Medical Center
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New York
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New York, New York, United States, 10016
- NYU Medical Center
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Acute PE of diagnostic concern
- Informed consent
- Willing to undergo Gd-MRA/MRV
Exclusion Criteria:
- Any implanted ferromagnetic foreign body, including a ferromagnetic cerebral aneurysm clip or implanted electrical device/pump
- Dependency on a continuous connection to an external electrical device/pump (e.g., pacemaker, internal defibrillator, cochlear implant, nerve or bone stimulator implant, ICU appliance) and cardiac pacing wires
- Severe claustrophobia
- Severe shaking
- Inability to lie still for 30 minutes
- Pregnancy and nursing mothers
- Serum creatinine levels within range of normal at local center
- Sickle cell anemia, other hemoglobinopathies, and other hemolytic anemias
- Critical illness, shock or hypotension, hemodynamic instability, ventilatory support, chronic anticoagulation, inferior vena cava filter
- Documented episodes of ventricular fibrillation or sustained ventricular tachycardia within the past 24 hours
- Myocardial infarction within the past month
- History of allergy to gadolinium-containing contrast agents or to iodinated contrast media
- Current symptomatic asthma
- Clinical evidence of venous thrombosis of the upper extremity
- Prisoners
- Institutionalized or mentally handicapped patients
- Too large to fit in MRI unit
Study Plan
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Diagnosis or exclusion of pulmonary embolism in agreement with a reference standard
Time Frame: Measured within 36 to 48 hours of study entry
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Measured within 36 to 48 hours of study entry
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Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Sarah Fowler, PhD, George Washington University
- Principal Investigator: Charles Hales, MD, Massachusetts General Hospital
- Principal Investigator: Russell Hull, MBBS, MSc, University of Calgary
- Principal Investigator: Kenneth Leeper, Jr., MD, Emory University
- Principal Investigator: David Naidich, MD, NYU Langone Health
- Principal Investigator: Daniel Sak, Do, St. Joseph Mercy Oakland
- Study Chair: Paul D. Stein, MD, St. Joseph Mercy Oakland
- Principal Investigator: John Weg, MD, University of Michigan at Ann Arbor
- Principal Investigator: Pamela Woodard, MD, Washington University School of Medicine
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 329
- U01HL077155 (U.S. NIH Grant/Contract)
- U01HL077149 (U.S. NIH Grant/Contract)
- U01HL077150 (U.S. NIH Grant/Contract)
- U01HL077151 (U.S. NIH Grant/Contract)
- U01HL077153 (U.S. NIH Grant/Contract)
- U01HL077154 (U.S. NIH Grant/Contract)
- U01HL077358 (U.S. NIH Grant/Contract)
- U01HL081593 (U.S. NIH Grant/Contract)
- U01HL081594 (U.S. NIH Grant/Contract)
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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