New study watches how brain blood vessels react after aneurysm bleed
NCT ID NCT07305922
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study observes 200 adults who had a bleeding stroke from a brain aneurysm and now have narrowed blood vessels. Researchers will monitor brain blood flow using ultrasound to see how it changes with standard treatments like raising blood pressure or using medication to widen vessels. The goal is to gather information, not to test a new treatment.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 200 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Dec 2025
- Expected to finish
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Dec 2030
An estimate. End dates often move.
- Lead sponsor
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A government agency
The lead sponsor is a government body.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Patients treated for subarachnoid haemorrhage at the Intensive care unit at Karolinska University Hospital.
- 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: * Adults 18 years or older * Critical care after subarachnoid haemorrhage * Aneurysm secured by surgical clipping or endovascular procedure * Suspected, emerging or established severe cerebral vasospasm Exclusion Criteria: * Anticipated survival less than five days, as determined by treating clinician * Transcranial Doppler signal too weak * Pregnancy
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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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Karolinska University Hospital
RECRUITINGStockholm, 17176, Sweden
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Can combined brain and body training speed recovery after a brain bleed?
- Blood particle study could reveal new clues for aneurysm diagnosis
- Blood drug levels may predict recovery after brain bleed