Active — Not RecruitingNot Applicable

Analysis of Disturbances in Neurofluid Dynamics in Type I Chiari Malformations

France60 participantsStarted 2024-06-24

Plain-language summary

A global analysis of craniospinal hemodynamics and hydrodynamics is necessary to better understand the pathophysiology of Chiari malformations. This includes an analysis of intraventricular CSF flow, intracranial subarachnoid spaces, foramen magnum, cervical subarachnoid spaces and within the syringomyelia cavity when present. The investigators will also analyze the pulsatility of the cerebellar tonsils in the foramen magnum. Hemodynamic analysis will be performed at the high cervical level (internal carotid and vertebral arteries, jugular veins) and intracranially (carotid and basilar arteries, right sinus and superior longitudinal sinus). This analysis will be made possible by PCMRI acquisitions with slice planes allowing the analysis of the dynamics of the CSF (mesencephalic aqueduct, prepontic cisterns, foramen magnum, at the level of the C2C3 disc, syringomyelia if present), cerebellar tonsils (foramen magnum). The cross-sectional planes for hemodynamic analysis will be at the level of the C2C3 disc (cervical vascular analysis) and upstream of the polygon of Willis (intracranial vascular analysis). The goal is to complement the clinical and morphological investigations with quantitative imaging of cerebrospinal fluid (CSF) and blood flow in the craniospinal system. These flows are potentially altered or causes of this Chiari anomaly. The investigators propose a translational research project of clinical research allowing the analysis of a diagnostic technique by a diagnostic, monocentric, prospective study. After neurosurgical consultation, patients with Chiari malformation will be assigned to a symptomatic Chiari malformation or a non-symptomatic Chiari malformation group. They will be offered to participate in this study after information and informed consent. The allocation between the two groups will be made according to the symptomatic or non-symptomatic nature of the Chiari malformation. After inclusion, the patients will have a morphological MRI and a PCMRI according to the determined slice plans and allowing a global analysis of the craniospinal hemohydrodynamics. Craniospinal hemohydrodynamics in a control population will also be analyzed using the same methodology by PCMRI.

Who can participate

Age range

18 Years – 50 Years

Sex

ALL

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Inclusion Criteria: * All patients with major symptomatic or nonsymptomatic CMI * aged 18 to 50 years * no previous neurosurgical, neurological, or cardiological history. * Controls should be age-matched to symptomatic CMI group. They should not have a history of neurosurgery, neurology, or cardiology. Exclusion Criteria: * Patients who are minors or over 50 years of age * CMI invalidated by our radiological review * Neurosurgical, neurological or cardiological history * MRI contraindication * pregnant, breast-feeding and parturient women

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

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Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

CSF Flow

Timeframe: day 1

Blood Flow

Timeframe: day 1

Trial details

NCT IDNCT06502431

SponsorCentre Hospitalier Universitaire, Amiens

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2025-04-01

View on ClinicalTrials.gov More Type I Chiari Malformation trials