Pilot Study to Evaluate MR-guided Laser Ablation of Focal Lesions in Patients with Medically Refractory Partial Epilepsy


  • Study type

  • Study IDs

  • Describes the nature of a clinical study. Types include:

    • Observational study — observes people and measures outcomes without affecting results.
    • Interventional study (clinical trial) — studies new tests, treatments, drugs, surgical procedures or devices.
    • Medical records research — uses historical information collected from medical records of large groups of people to study how diseases progress and which treatments and surgeries work best.
  • Site IRB
    • Jacksonville, Florida: 10-007909
    • Rochester, Minnesota: 10-007909
    NCT ID: NCT01703143
    Sponsor Protocol Number: VIS-10-005

About this study

To investigate whether MR-guided laser induced thermal therapy in patients diagnosed with focal lesional epilepsy using the Visualase Thermal Therapy System is both a feasible and safe minimally invasive technique for control of seizures in such patients.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.

See eligibility criteria

Inclusion Criteria:

  • Age 18 years or older at entry to protocol.
  • History of MRI lesional-related epilepsy for at least one year.
  • Failure to respond to more than 2 anti-epileptic drugs at adequate dose and duration.
  • Candidate for resective epilepsy surgery.
  • Considered healthy enough to undergo surgery with general anesthesia.
  • The patient has given written informed consent after the nature of the study and alternative treatment options have been explained.
  • Must have 3 months of seizure frequency recorded prior to procedure.

Exclusion Criteria:

  • Presence of any non-MRI compatible implanted electronic device.
  • Presence of a metallic prosthetic or implant including artificial hips, knees, joints, or rods and screws.
  • Active Major depression
  • History of Suicide attempts
  • History of Non-Epileptic Behavioral Spells

Participating Mayo Clinic locations

Study statuses change often. Please contact us for help.

Mayo Clinic Location Status Contact

Jacksonville, Fla.

Mayo Clinic principal investigator

W Marsh, M.D.

Closed for enrollment

Contact information:

Sabrina Huskic



Rochester, Minn.

Mayo Clinic principal investigator

W Marsh, M.D.

Closed for enrollment

Contact information:

Karla Crockett




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