ExAblate Transcranial MRgFUS of the Subthalamic Nucleus for Treatment of Parkinson's Disease

Completed · Not applicable · Has a placebo group

Conditions studied: Parkinson's Disease

In brief

This is primarily a safety protocol to evaluate the safety of subthalamotomy using Transcranial ExAblate for treatment of Parkinson's Disease (PD) motor features.

Key facts

Study ID

NCT02246374

Run by

InSightec

People needed

7

Starts

2014-09-01

Expected to finish

2021-05-18

Last updated by the study team

2026-04-20

Who can join

Age: 30 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Men and women, age 30 years and older
• Subjects who are able and willing to give informed consent and able to attend all study visits
• Subjects with a diagnosis of idiopathic PD by UK Brain Bank Criteria as confirmed by a movement disorder neurologist at the site
• Levodopa responsive as defined by at least a 30% reduction in MDS-UPDRS motor sub-scale in the ON vs OFF medication state
• Disabling motor clinical features not optimally controlled by an adequate medication prescription. An adequate medication prescription is defined as a therapeutic dose of each medication or the development of side effects as the medication dose is titrated
• Predominant disability from one side of the body (i.e unilateral or markedly asymmetric disease) as determined by movement disorders neurologist and neurosurgeon
• Subjects should be on a stable dose of all PD medications for 30 days prior to study entry
• Subthalamic nucleus is visible on MRI so that it can be targeted by the ExAblate device
• Subjects should have a Screening motor assessment of ≥ 35 while OFF medications on the MDS-UPDRS
• Subject is able to communicate sensations during the ExAblate Transcranial procedure

You may not qualify if…

• Hoehn and Yahr stage in the ON medication state of 2.5 or greater
• Presence of severe dyskinesia as noted by a score of 3 or 4 on questions 4.1 and 4.2 of the MDS-UPDRS
• Presence of other central neurodegenerative disease suspected on neurological examination. These include: multisystem atrophy, progressive supranuclear palsy, corticobasal syndrome, dementia with Lewy bodies, and Alzheimer's disease
• Any suspicion that Parkinsonian symptoms are a side effect from neuroleptic medications
• Subjects who have had deep brain stimulation or a prior stereotactic ablation of the basal ganglia
• Presence of significant cognitive impairment defined as score ≤ 21 on the Montreal Cognitive Assessment (MoCA) or Mattis Dementia Rating Scale of 120 or lower
• Unstable psychiatric disease, defined as active uncontrolled depressive symptoms, psychosis, delusions, hallucinations, or suicidal ideation. Subjects with stable, chronic anxiety or depressive disorders may be included provided their medications have been stable for at least 60 days prior to study entry and if deemed appropriately managed by the site neuropsychologist
• Subjects with significant depression as determined following a comprehensive assessment by a neuropsychologist. Significant depression is being defined quantitatively as a score of greater than 14 on the Beck Depression Inventory
• Legal incapacity or limited legal capacity as determined by the neuropsychologist
• Subjects exhibiting any behavior(s) consistent with ethanol or substance abuse as defined by the criteria outlined in the DSM-IV as manifested by one (or more) of the following occurring within the preceding 12 month period:
• Recurrent substance use resulting in a failure to fulfill major role obligations at work, school, or home (such as repeated absences or poor work performance related to substance use; substance-related absences, suspensions, or expulsions from school; or neglect of children or household)
• Recurrent substance use in situations in which it is physically hazardous (such as driving an automobile or operating a machine when impaired by substance use)
• Recurrent substance-related legal problems (such as arrests for substance related disorderly conduct)
• Continued substance use despite having persistent or recurrent social or interpersonal problems caused or exacerbated by the effects of the substance (for example, arguments with spouse about consequences of intoxication and physical fights)
• Subjects with unstable cardiac status including:
• Unstable angina pectoris on medication
• Subjects with documented myocardial infarction within six months of protocol entry
• Significant congestive heart failure defined with ejection fraction < 40
• Subjects with unstable ventricular arrhythmias
• Subjects with atrial arrhythmias that are not rate-controlled
• Severe hypertension (diastolic BP > 100 on medication)
• History of or current medical condition resulting in abnormal bleeding and/or coagulopathy
• Receiving anticoagulant (e.g. warfarin) or antiplatelet (e.g. aspirin) therapy within one week of focused ultrasound procedure or drugs known to increase risk or hemorrhage (e.g. Avastin) within one month of focused ultrasound procedure
• Subjects with risk factors for intraoperative or postoperative bleeding as indicated by: platelet count less than 100,000 per cubic millimeter, a documented clinical coagulopathy, or INR coagulation studies exceeding the institution's laboratory standard
• Patient with severely impaired renal function with estimated glomerular filtration rate <30 mL/min/1.73m2 (or per local standards should that be more restrictive) and/or who is on dialysis

Where it is running

• University of Virginia — Charlottesville, Virginia, United States

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.