3D Time-of-Flight Magnetic Resonance Angiography in Hemodialysis Patients With Arteriovenous Fistula
NCT ID: NCT04312711
Last Updated: 2022-01-11
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
68 participants
INTERVENTIONAL
2018-12-01
2021-03-31
Brief Summary
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Detailed Description
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Conditions
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Study Design
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NA
SINGLE_GROUP
DIAGNOSTIC
NONE
Study Groups
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intervention
All participants received 3D-TOF-MRA and ultrasound examination, and DSA is used as golden reference
3D-TOF-MRA
The Principle of 3D-TOF-MRA is based on the "flow effect" of MR. In the GE sequence of MRA imaging, the effect of RF pulses makes the protons in the stationary tissue in the active layer in a saturated state, and the longitudinal magnetization disappears. When the inflow blood appears, its protons are in an unsaturated state and have a high degree of longitudinal magnetization. In this way, a clear difference is formed between saturated tissue and unsaturated flowing blood to display blood vessels. 3D-TOF-MRA is a non-invasive and safe method for diagnosing vascular diseases.
Interventions
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3D-TOF-MRA
The Principle of 3D-TOF-MRA is based on the "flow effect" of MR. In the GE sequence of MRA imaging, the effect of RF pulses makes the protons in the stationary tissue in the active layer in a saturated state, and the longitudinal magnetization disappears. When the inflow blood appears, its protons are in an unsaturated state and have a high degree of longitudinal magnetization. In this way, a clear difference is formed between saturated tissue and unsaturated flowing blood to display blood vessels. 3D-TOF-MRA is a non-invasive and safe method for diagnosing vascular diseases.
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* persistent edema of the limb with the fistula;
* decreased pulse or fremitus in anastomotic astium
* increase in venous pressure; blood flow at the access of less than 200 mL/min;
Exclusion Criteria
* contraindications to magnetic resonance imaging (MRI) examination;
* platelet(PLT)\<60\*10\^9/L or international normalized ratio (INR)\>1.5; 4. important organ function failure or other serious illness; 5. Allergic to antiplatelet drug, anticoagulant drug, anaesthetic drug and contrast material.
ALL
No
Sponsors
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Shanghai Jiao Tong University Affiliated Sixth People's Hospital
OTHER
Responsible Party
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Yueqi Zhu
Clinical Professor
Principal Investigators
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Yue-Qi Zhu, Dr
Role: PRINCIPAL_INVESTIGATOR
Shanghai 6th People's Hospital
Locations
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Shanghai 6th People's Hospital
Shanghai, , China
Countries
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Provided Documents
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Document Type: Study Protocol and Statistical Analysis Plan
Other Identifiers
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Shanghai 6th People's Hospital
Identifier Type: -
Identifier Source: org_study_id
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