Recruiting

Focused Ultrasound

Sponsor:

Children's National Research Institute

Code:

NCT06036199

Conditions

Cerebral Palsy, Dyskinetic

Secondary Dystonia

Eligibility Criteria

Sex: All

Age: 8 - 22

Healthy Volunteers: Not accepted

Interventions

Focused Ultrasound Pallidotomy

Study Details

Brief summary:

The primary objective of the proposed study is to evaluate the safety of ExAblate Transcranial MRgFUS as a tool for creating bilateral or unilateral lesions in the globus pallidus (GPi) in patients with treatment-refractory secondary dystonia due to dyskinetic cerebral palsy

Conditions

Cerebral Palsy, Dyskinetic

Secondary Dystonia

Study ID

NCT06036199

Start date

Jan 26, 2024

Status verified date

Apr, 2026

Completion date

Aug, 2028

Anticipated

Primary completion date

Aug, 2028

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 8 - 22

Healthy Volunteers: Not accepted

Inclusion Criteria:

  • The treating physician has chosen GPi-DBS or pallidotomy for the treatment of the secondary dystonia caused by cerebral palsy in this patient
  • Patient and/or legal representative, if the patient is underaged or not capable to give consent himself, have chosen pallidotomy as treatment
  • The consent to participate in the trial of the underaged patient, if he is capable to understand the study requirements, is required
  • Age at enrolment 8-22 years
  • Diagnosis of secondary dystonia due to cerebral palsy caused by perinatal hypoxic injury
  • Anti-dystonic pharmacotherapy insufficient
  • Stable anti-dystonic medication over the last 30 days
  • Globus pallidus internus (pars posterior) and thalamus (motor part) intact on MRI (not older than 2 years - if possible)
  • No fixed severe skeletal deformations with loss of function, which need immediate orthopaedic surgical intervention
  • Sufficient compliance of the patient or the legal representative if the patient is underaged or not capable to give consent himself to take part in the study
  • Informed consent to take part in the study from patient and/or legal representative if the patient is underaged or not capable to give consent himself
  • Patient and/or legal representative if the patient is underaged or not capable to give consent himself, understands the study requirements and the treatment procedures and provides written informed consent before any study-specific tests or procedures are performed

Exclusion Criteria:

  • Patients with known primary (e.g. DYT1) or idiopathic dystonia
  • Severe axial hypotonia with total loss of head control (e.g. absence of control at "upper thoracic level" in the SATCo score) (medication effect excluded)
  • Fixed hemi-dystonia
  • Severe spasticity in knee- and elbow-flexors and -extensors (Modified Ashworth Scale >3)
  • Fixed severe skeletal contractions with loss of function which require immediate orthopaedic surgical intervention
  • Patients with other severe concurrent neurological disease (e. g. brain tumor, neurodegenerative diseases, trauma etc.)
  • Condition likely to require use of MRI in the future
  • Any intracranial abnormality or medical condition that would contraindicate DBS surgery
  • Any findings in neuropsychological screening assessments that would contraindicate DBS surgery
  • Any current drug and / or alcohol abuse
  • Any history of frequent grand-mal seizures without response to anticonvulsive treatment
  • Any other active implanted device (e.g. Cochlear implant, pacemaker), whether turned on or off, would be allowed provided that they do not interfere with functioning of the device.
  • The presence of DBS leads due the risks of these ferromagnetic devices in the MRI environment.
  • A history of neurostimulation intolerance in any area of the body.
  • Currently on any anticoagulant medications that cannot be discontinued during perioperative period.
  • Any significant medical condition that is likely to interfere with study procedures or likely to confound evaluation of study endpoints, including any terminal illness with survival <24 months.
  • Participation in another drug, device, or biologics trial concurrently or within the preceding 30 days; any other trial participation should be approved by the Principal Investigator.
  • A female that is breastfeeding or of childbearing potential with a positive urine pregnancy test or - if a person is sexually active - not using sufficient contraception with a Pearl Index of less than 1% including all forms of hormonal contraception ("antibaby-pill", hormonal plaster, NuvaRing®, Implanon®, hormonal depot injections, contraceptive coil), the tubal ligature (female sterilization). Alternatively, the female of child bearing potential is sexually abstinent.
  • Subjects who have contraindications to anesthesia, in the judgment of the attending anesthesiologist
  • Subjects who are unwilling or unable to undergo general anesthesia
  • Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the subject or the quality of the data.
  • Minimum head circumference < 49cm
  • Skull Density Ratio (SDR) <0.40.

Study Design

Enrollment

10 participants

Anticipated

Intervention Model

Single group

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Focused Ultrasound Pallidotomy

Pediatric and young adult patients between ages of 8 and 22 years with pharmaco-resistant secondary dystonia due to dyskinetic cerebral palsy who have Focused Ultrasound Pallidotomy

Interventions

Focused Ultrasound Pallidotomy

Use of ExAblate Transcranial MR guided Focused Ultrasound as a tool for creating bilateral or unilateral lesions in the globus pallidus (GPi) in patients with treatment-refractory secondary dystonia due to dyskinetic cerebral palsy

Primary outcome measure

  • Incidence and severity of device-related and procedure-related adverse events (AE) [ Time Frame: 2 years ]

Central Contacts and Locations

Central contacts

Chima Oluigbo, MD

2024763531coluigbo@childrensnational.org

Saige Teti

2024763755sateti@childrensnational.org

Locations

Children's National Hospital

Recruiting

Washington D.C., District of Columbia, United States, 20010

Contacts

Chima Oluigbo, MD

2024763531coluigbo@childrensnational.org

Saige Teti, BA

2024763020sateti@childrensnational.org

More Information

Sponsor

Children's National Research Institute

Last update posted

Jun 11, 2026

Last verified

Apr, 2026

Keywords

  • High intensity focused ultrasound (HIFU)
  • Pallidotomy

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Children's National Research Institute on 2026-06-11.