New imaging tool may predict leg amputation risk
NCT ID NCT04054609
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether a new type of PET/MR scan using a tracer called FAZA can measure oxygen levels in leg tissues of people with critical limb ischemia, a severe form of peripheral artery disease. About 40 adults who are scheduled for a procedure to restore blood flow will get the scan before and after treatment. The goal is to see if the scan can help predict who will benefit most from the procedure and improve treatment decisions.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 40 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Aug 2019
- Expected to finish
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Dec 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age \>= 18 years; * Patients with clinical evidence of critical limb ischemia that are candidates for revascularization treatment; * A negative urine or serum pregnancy test in women of child-bearing age; * Ability to provide written informed consent to participate in the study. Exclusion Criteria: * Contraindication for MR as per current institutional guidelines; * Inability to lie supine for at least 30 minutes; * Pregnant or breastfeeding; * Unable or unwilling to provide informed consent; * Impending amputation within 6 weeks of presentation; * Previous metallic hardware in the lower limbs; * Unable to have ethanol.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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University Health Network
RECRUITINGToronto, Ontario, M5G 2N2, Canada
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Other studies related to the condition(s) this trial covers.
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