Feasibility Study of ExAblate Thalamotomy for Treatment of Chronic Trigeminal Neuropathic Pain

NCT ID: NCT03309813

Last Updated: 2023-10-03

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: NA
• Total Enrollment: 10 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2017-12-01
• Study Completion Date: 2023-10-31

Brief Summary

The goal of this prospective, randomized, sham-controlled, crossover study is to evaluate the safety and feasibility of ExAblate Neuro treatment of chronic trigeminal neuropathic pain.

Detailed Description

This study is to show that for patients with treatment-refractory chronic trigeminal neuropathic pain, ExAblate Neuro focused ultrasound (FUS) can safely create lesions bilaterally in the thalamic nuclei to reduce pain and provide functional benefits in daily activities. After informed consent and screening, eligible subjects will be randomized to either an ExAblate treatment or a Sham Control procedure. Subjects who are randomized to Sham Control will undergo the same procedure and follow-up visits through their Month 3 visit. After the Month 3 assessments are complete, all subjects will be un-blinded and those in the Sham treated group will have the option for an actual ExAblate treatment in an un-blinded fashion, as long as they still qualify for ExAblate treatment.

Conditions

Trigeminal Neuropathic Pain

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: SEQUENTIAL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: QUADRUPLE

Study Groups

Transcranial ExAblate

ExAblate Transcranial MR Guided Focused Ultrasound (MRgFUS)

Group Type: EXPERIMENTAL

Transcranial ExAblate

Intervention Type: DEVICE

ExAblate Thalamotomy for Chronic Trigeminal Neuropathic Pain

Sham Transcranial ExAblate

ExAblate MRgFUS Sham Procedure

Group Type: SHAM_COMPARATOR

Sham Transcranial ExAblate

Intervention Type: DEVICE

Sham ExAblate Thalamotomy procedure

Crossover Transcranial Exablate

Intervention Type: DEVICE

Subjects randomized to the Sham Exablate could opt for the Crossovover Transcranial Exablate Arm (Exablate Thalamotomy) after completing the Month 3 visit in the Sham Arm.

Interventions

Transcranial ExAblate

ExAblate Thalamotomy for Chronic Trigeminal Neuropathic Pain

Intervention Type: DEVICE

Sham Transcranial ExAblate

Sham ExAblate Thalamotomy procedure

Intervention Type: DEVICE

Crossover Transcranial Exablate

Subjects randomized to the Sham Exablate could opt for the Crossovover Transcranial Exablate Arm (Exablate Thalamotomy) after completing the Month 3 visit in the Sham Arm.

Intervention Type: DEVICE

Other Intervention Names

MRgFUS; Thalamotomy; MRgFUS; Thalamotomy

Eligibility Criteria

Inclusion Criteria

• Men and women, between 18 and 75 years, inclusive
• Subjects who are able and willing to give consent and able to attend all study visits
• Severe chronic, trigeminal neuropathic pain of ≥6 months duration.
• Pain is medication-refractory to adequate trials of at least 3 prescription medications commonly used for symptomatic relief of neuropathic pain with current adjunctive use of at least one medication. An adequate medication trial is defined as a therapeutic dose of each medication without sufficient effect.
• Pain is treatment-resistant to at least one interventional therapies including injections, procedures, neuromodulation, and surgery.
• Able to communicate sensations during the focused ultrasound treatment
• Stable prescribed doses of all symptomatic pain medications for 30 days prior to study entry and for the duration of the 3-month blinded phase of the study.

Exclusion Criteria

• Craniofacial pain syndromes related to malignancy of the head and neck
• Idiopathic trigeminal neuralgia
• Headache syndromes like migraine, cluster headache
• Temporomandibular joint syndrome
• Atypical facial pain or pain related to a somatoform disorder
• Subjects with active psychiatric illness will be excluded. For the purpose of this study, active psychiatric illness includes:

• Exhibiting current suicide ideation and/or a history of suicide attempt within past 2 years
• been hospitalized for the treatment of a psychiatric illness within the past 2 years
• received transcranial magnetic stimulation for depression treatment
• received electroconvulsive therapy for depression
• Any presence or history of psychosis will be excluded.
• 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)
• Subjects with standard contraindications for MR imaging such as non-MRI compatible implanted metallic devices including cardiac pacemakers, size limitations, etc.
• 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
• Individuals who are not able or willing to tolerate the required prolonged stationary supine position during treatment (can be up to 4 hours of total table time.)
• Subjects participating or have participated in another clinical trial in the last 30 days
• Presence of systemic neurological disease or dysfunction
• Known life-threatening systemic disease
• Subjects with brain tumors or any significant intracranial mass. Trigeminal or cavernous sinus tumors causing neuropathic pain are not excluded.
• Pregnancy or lactation
• Legal incapacity or limited legal capacity
• Subjects with a deep brain stimulation implant or with a prior stereotactic thalamic ablation
• History of hemorrhagic stroke or cerebrovascular event within the past year of treatment exhibiting incomplete resolution
• History of seizures within past year of treatment
• Severe kidney disease or on dialysis
• Subjects who are unable to tolerate medications due to intolerable side effects.
• Subjects with pain other than craniofacial neuropathic pain.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 75 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

InSightec

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

William J Elias, MD

Role: PRINCIPAL_INVESTIGATOR

University of Virginia

Locations

University of Virginia

Charlottesville, Virginia, United States

Countries

United States

References

Ishaque M, Moosa S, Urban L, Kundu B, Qureshi Z, Spears T, Fletcher PT, Donahue J, Patel SH, Goldstein RB, Finan PH, Liu CC, Elias WJ. Bilateral focused ultrasound medial thalamotomies for trigeminal neuropathic pain: a randomized controlled study. J Neurosurg. 2023 Dec 29;140(6):1799-1809. doi: 10.3171/2023.10.JNS23661. Print 2024 Jun 1.

Reference Type: DERIVED

PMID: 38157521 (View on PubMed)

Provided Documents

Document Type: Study Protocol

View Document

Other Identifiers

NP002

Identifier Type: -

Identifier Source: org_study_id