Development of Diffusion MRI and Tractography Technique for the Detection of Nerve Lesions in Brachial Plexus Injuries (IRM-POPB)
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.
Panoramica dello studio
Stato
Stato
Condizioni
Condizioni
Intervento / Trattamento
Intervento / Trattamento
Descrizione dettagliata
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.
Tipo di studio
Tipo di studio
Iscrizione (Stimato)
Iscrizione
Fase
Fase
- Non applicabile
Contatti e Sedi
Contatto studio
Contatto studio
- Nome: Manon BACHY-RAZZOUK, PU-PH
- Numero di telefono: 00 33 1 44 73 69 37
- Email: manon.bachy@aphp.fr
Backup dei contatti dello studio
- Nome: Mathilde PAYEN, PH
- Numero di telefono: 00 33 2 32 88 89 90
- Email: mathilde-payen@hotmail.fr
Luoghi di studio
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Paris, Francia, 75012
- Reclutamento
- Service de Chirurgie Orthopédique et Réparatrice de l'Enfant, Hôpital Armand Trousseau AP-HP
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Contatto:
- Manon BACCHY-RAZZOUK, PU-PH
- Numero di telefono: 00 33 1 44 73 69 37
- Email: manon.bachy@aphp.fr
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Contatto:
- Mathilde PAYEN, CCA
- Email: mathilde-payen@hotmail.fr
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Criteri di partecipazione
Criteri di ammissibilità
Criteri di ammissibilità
Età idonea allo studio
- Bambino
- Adulto
Accetta volontari sani
Descrizione
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)
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Altro
- Assegnazione: N / A
- Modello interventistico: Assegnazione di gruppo singolo
- Mascheramento: Nessuno (etichetta aperta)
Numero di armi
Armi e interventi
Gruppo di partecipanti / ArmGruppo di partecipanti / Arm |
Intervento / TrattamentoIntervento / Trattamento |
|---|---|
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Altro: One group
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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. |
Cosa sta misurando lo studio?
Misure di risultato primarie
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Characterization of the microstructure by MRI diffusion in patients with a history of unoperated obstetrical brachial plexus palsy (OBBP)
Lasso di tempo: 3 months max.
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Extraction of diffusion tensor parameters (measurement of signal anisotropy ) along the different nerves constituting the brachial plexus, reconstructed using tractography.
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3 months max.
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Characterization of the microstructure by MRI diffusion in patients with a history of unoperated obstetrical brachial plexus palsy (OBBP)
Lasso di tempo: 3 months max.
|
Extraction of diffusion tensor parameters, measurement of diffusivity, along the different nerves constituting the brachial plexus, reconstructed using tractography
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3 months max.
|
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Characterization of the microstructure by MRI diffusion in patients with a history of unoperated obstetrical brachial plexus palsy (OBBP)
Lasso di tempo: 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.
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3 months max.
|
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Characterization of the microstructure by MRI diffusion in patients with a history of unoperated obstetrical brachial plexus palsy (OBBP)
Lasso di tempo: 3 months max.
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Description of FA, MD parameter measurements on tractography sequences along the complete pathway of the brachial plexus nerves
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3 months max.
|
Misure di risultato secondarie
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Determination of the anatomical location of POPB lesions (trunk, terminal branches, etc.) in comparison with the contralateral healthy side of the patients
Lasso di tempo: 3 months max.
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Compare by MRI diffusion anatomical and diffusion measurements between different subjects
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3 months max.
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Analyze the plexus fibers altered by the neuroma in the affected plexuses
Lasso di tempo: 3 months max.
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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)
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3 months max.
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Analyze the plexus fibers altered by the neuroma in the affected plexuses
Lasso di tempo: 3 months max.
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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)
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3 months max.
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Establish anatomoclinical relationships with the data from the specific and in-depth clinical examination carried out in consultation
Lasso di tempo: 3 months max.
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Analysis of the apparent lesions visible on MRI
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3 months max.
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Analyze the feasibility of the DTI MRI acquisition protocol
Lasso di tempo: 3 months max.
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Feasibility : acquisition time (the acquisition time required to obtain image quality sufficient for post-MRI analysis),
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3 months max.
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Analyze the feasibility of the DTI MRI acquisition protocol
Lasso di tempo: 3 months max.
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Feasibility: imaging quality
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3 months max.
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Collaboratori e investigatori
Sponsor
Sponsor
Investigatori
Investigatori
- Investigatore principale: Manon BACHY-RAZZOUK, PU-PH, Assistance Publique - Hôpitaux de Paris
Studiare le date dei record
Studia le date principali
Inizio studio (Effettivo)
Inizio studio
Completamento primario (Stimato)
Completamento primario
Completamento dello studio (Stimato)
Completamento dello studio
Date di iscrizione allo studio
Primo inviato
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Primo Inserito
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento pubblicato
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Altri numeri di identificazione dello studio
Altri numeri di identificazione dello studio
- APHP211551
- IDRCB: 2024-A02069-38 (Altro identificatore: ANSM)
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