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Development of Diffusion MRI and Tractography Technique for the Detection of Nerve Lesions in Brachial Plexus Injuries (IRM-POPB)

11 augustus 2026 bijgewerkt door: Assistance Publique - Hôpitaux de Paris

Development of Diffusion MRI and Tractography Technique for the Detection of Nerve Lesions in Brachial Plexus Injuries: Feasibility Study

The objective of this prospective study is to contribute to improving the management of patients with obstetric brachial plexus palsy.

The main objective is the characterization of the microstructure by diffusion MRI in patients with a history of unoperated obstetrical brachial plexus palsy.

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

The brachial plexus is a collection of nerve fibers that provides all sensory and motor functions of the entire upper limb. Its anatomy is particularly complex.

Obstetric brachial plexus palsy (OBP) is defined as flaccid paralysis of the upper limb, occurring at birth, related to forceful manipulation of the fetus for its delivery. This neonatal condition is not uncommon.

While most cases of OBP appear to recover spontaneously, children with incomplete recovery may have significant functional limitations related to muscle weakness, more or less associated with soft tissue retractions. Muscle weakness will induce an imbalance that can affect bone growth and joint development.

Simple stretching or neurapraxia almost always progresses spontaneously and favorably. Avulsion injuries, on the other hand, cannot heal spontaneously and therefore require surgery to restore upper limb function. The aim of this study is that DTI (Diffusion Tensor Imaging) imaging of the brachial plexus allows access to the entire brachial plexus in order to establish a lesion assessment and a powerful tool to aid in the decision for surgical exploration.

To date, there is no standard imaging technique for exploring the brachial plexus.

Diffusion tensor imaging is a new acquisition technique that tracks the movement of water molecules in all three spatial planes.

Tractography, or fiber tracking, is an acquisition and analysis technique performed using diffusion tensor imaging (DTI) MRI data.

An MRI protocol has been developed for analyzing the brachial plexus based on pilot MRI scans performed at the Brain and Spine Institute. Subjects selected for this study will undergo MRI scans using different sequences from this protocol. Image processing and tractography sequences will allow for precise analysis of the function and structure of the brachial plexus nerves and characterization of lesions in affected subjects compared to the unaffected contralateral side. The hypothesis of this research is that DTI imaging of the brachial plexus will allow a better understanding of POPB by establishing a precise lesion assessment in association with clinical data.

This is a single-center, non-randomized feasibility study involving MRI imaging analyses and requiring no changes to the patient's usual care.

Imaging data from each subject will be analyzed and statistically compared. Each patient will serve as their own control (comparison between the healthy and pathological plexus).

Imaging data from each subject can be analyzed and statistically compared.

Studietype

Ingrijpend

Inschrijving (Geschat)

8

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

  • Naam: Manon BACHY-RAZZOUK, PU-PH
  • Telefoonnummer: 00 33 1 44 73 69 37
  • E-mail: manon.bachy@aphp.fr

Studie Contact Back-up

Studie Locaties

  • Frankrijk
      • Paris, Frankrijk, 75012
        • Werving
        • Service de Chirurgie Orthopédique et Réparatrice de l'Enfant, Hôpital Armand Trousseau AP-HP
        • Contact:
        • Contact:

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Kind
  • Volwassen

Accepteert gezonde vrijwilligers

Nee

Beschrijving

Inclusion Criteria:

  • Patients aged 14 to 30 years
  • Consulted by the Orthopedics Department at Armand Trousseau Hospital
  • Diagnosed and monitored by Armand Trousseau Hospital for obstetrical brachial plexus palsy (OBBP)
  • Having a single, unoperated lesion (lesions are very different and only exceptionally affect all the roots bilaterally).
  • Not suffering from bone or neurological pathology unrelated to OBP
  • Patients affiliated with or entitled to a social security scheme
  • Patients who have received informed information and have signed, with the investigator, a consent form to participate in the study
  • Parents/legal guardians who have received informed information and have co-signed, with the investigator, a consent form to participate in the study, for minor patients

Exclusion Criteria:

  • History of rheumatoid pathologies, constitutional bone diseases, past or current pathologies affecting the arm or neck unrelated to the obstetric brachial plexus, any history of neoplasia or radiographic appearance consistent with a neoplastic fracture
  • Current pregnancy
  • Inability to perform the MRI examination (presence of a contraindication, incapacitating pain, or claustrophobia)
  • Large tattoo present in the area of interest (artifacts)
  • Patients deprived of liberty, or under guardianship/curatorship
  • Patients receiving medical assistance (AME)

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Ander
  • Toewijzing: NVT
  • Interventioneel model: Opdracht voor een enkele groep
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Ander: One group
Ander: Performing an MRI

Various MRI sequences were performed (without injection) according to a new protocol developed at the ICM.

This acquisition protocol consists of anatomical and diffusion sequences lasting approximately 1 hour.

The acquisitions were performed in a 3T MRI scanner, in the supine position with the palms facing upwards. Gadolinium was not used in our study.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Characterization of the microstructure by MRI diffusion in patients with a history of unoperated obstetrical brachial plexus palsy (OBBP)
Tijdsspanne: 3 months max.
Extraction of diffusion tensor parameters (measurement of signal anisotropy ) along the different nerves constituting the brachial plexus, reconstructed using tractography.
3 months max.
Characterization of the microstructure by MRI diffusion in patients with a history of unoperated obstetrical brachial plexus palsy (OBBP)
Tijdsspanne: 3 months max.
Extraction of diffusion tensor parameters, measurement of diffusivity, along the different nerves constituting the brachial plexus, reconstructed using tractography
3 months max.
Characterization of the microstructure by MRI diffusion in patients with a history of unoperated obstetrical brachial plexus palsy (OBBP)
Tijdsspanne: 3 months max.
Comparison of metrics (Anitropy Fraction, Mean Diffusion) of healthy versus injured nerves. Each plexus is manually segmented by ITK SNAP in order to extract the nerve pathways of each plexus.
3 months max.
Characterization of the microstructure by MRI diffusion in patients with a history of unoperated obstetrical brachial plexus palsy (OBBP)
Tijdsspanne: 3 months max.
Description of FA, MD parameter measurements on tractography sequences along the complete pathway of the brachial plexus nerves
3 months max.

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Determination of the anatomical location of POPB lesions (trunk, terminal branches, etc.) in comparison with the contralateral healthy side of the patients
Tijdsspanne: 3 months max.
Compare by MRI diffusion anatomical and diffusion measurements between different subjects
3 months max.
Analyze the plexus fibers altered by the neuroma in the affected plexuses
Tijdsspanne: 3 months max.
Analysis of the qualitative characteristics of the axons studied in the plexus area of the neuroma in affected subjects (visual analysis of the roots affected by the neuroma compared with the healthy side, as well as measurement of the volumes in voxels)
3 months max.
Analyze the plexus fibers altered by the neuroma in the affected plexuses
Tijdsspanne: 3 months max.
Analysis of the quantitative characteristics of the axons studied in the plexus area of the neuroma in affected subjects (fractional anisotropy, mean diffusion, axial diffusion and radial diffusion)
3 months max.
Establish anatomoclinical relationships with the data from the specific and in-depth clinical examination carried out in consultation
Tijdsspanne: 3 months max.
Analysis of the apparent lesions visible on MRI
3 months max.
Analyze the feasibility of the DTI MRI acquisition protocol
Tijdsspanne: 3 months max.
Feasibility : acquisition time (the acquisition time required to obtain image quality sufficient for post-MRI analysis),
3 months max.
Analyze the feasibility of the DTI MRI acquisition protocol
Tijdsspanne: 3 months max.
Feasibility: imaging quality
3 months max.

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Assistance Publique - Hôpitaux de Paris

Onderzoekers

  • Hoofdonderzoeker: Manon BACHY-RAZZOUK, PU-PH, Assistance Publique - Hôpitaux de Paris

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

9 januari 2026

Primaire voltooiing (Geschat)

1 januari 2027

Studie voltooiing (Geschat)

1 februari 2027

Studieregistratiedata

Eerst ingediend

24 juni 2025

Eerst ingediend dat voldeed aan de QC-criteria

11 augustus 2026

Eerst geplaatst (Werkelijk)

17 augustus 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

17 augustus 2026

Laatste update ingediend die voldeed aan QC-criteria

11 augustus 2026

Laatst geverifieerd

1 augustus 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Andere studie-ID-nummers

  • APHP211551
  • IDRCB: 2024-A02069-38 (Andere identificatie: ANSM)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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