Ultrasound and pupil checks could spot brain trouble after surgery
NCT ID NCT05843214
First seen Sep 11, 2026 · Last updated Sep 11, 2026
Summary
Researchers are studying whether three non-invasive monitoring tools can detect neurological deterioration early in patients recovering from planned brain surgery. The tools are transcranial doppler, which measures blood flow in brain arteries; optic nerve ultrasound, which measures the nerve sheath; and quantitative pupillometry, which measures pupil responses to light. About 230 French-speaking adults scheduled for intracranial surgery will be monitored before surgery and regularly for four days afterward. The goal is to see how these measurements change and whether they could help doctors catch problems sooner.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- non-invasive neuromonitoring using transcranial doppler, optic nerve ultrasound, and quantitative pupillometry
- What this could lead to
- If it works, this could give doctors a simple, bedside way to catch neurological problems early after brain surgery, before they become serious.
- What could go wrong
- This is an observational study, so it cannot prove that monitoring improves outcomes. The measurements may not reliably predict complications, and results may not apply to other types of brain surgery or patients.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 230 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Feb 2023
- 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.
Who is studied
Patients undergoing planned neurosurgery
- 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: * Regulated intracranial surgery: scheduled \> 48 hours * French-speaking patient * No opposition from the patient or a relative when the patient is unable to consent Exclusion Criteria: * Chronic subdural haematoma * Isolated cerebral endovascular procedure * Stereotactic biopsy * Scheduled ventriculoperitoneal shunt or isolated ventriculocisternostomy * Specific non-inclusion criteria for quantitative pupillometry: known pupillary abnormalities, glaucoma, cataract surgery and any ocular surgery.
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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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CHU de la Réunion
RECRUITINGSaint-Pierre, 97448, Reunion
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