EPR Pain: Electrophysiological Recordings From Deep Brain Stimulation Electrodes for Pain

St. Joseph's Hospital and Medical Center, Phoenix (Other)
Overall Status
Not yet recruiting
CT.gov ID

Study Details

Study Description

Brief Summary

Over the last 30 years, deep brain stimulation (DBS) has allowed tens of thousands of patients to receive relief of neurological symptoms that were refractory to standard medical treatment. Furthermore, by providing a rare window into the electrophysiological activity of the awake, human brain, DBS has facilitated invaluable advances in scientific understanding. These advances have then, in turn, allowed for further therapies to be developed for an ever growing population of patients that benefit from DBS therapy. This study hopes to add to this growing body of knowledge by implanting leads within, and recording from, the sensory thalamus and periaqueductal gray (PAG) in patients with chronic pain. Specifically, we hope to establish the long-term safety of DBS leads within the periaqueductal gray and sensory thalamus for the treatment of chronic pain. Furthermore, by recording from the electrodes of DBS patients implanted for treatment of their chronic pain, we hope to understand how the pain network responds to sensory stimuli and how DBS changes this response.

Condition or Disease Intervention/Treatment Phase
  • Device: DBS for Chronic Pain

Study Design

Study Type:
Anticipated Enrollment :
50 participants
Intervention Model:
Single Group Assignment
None (Open Label)
Primary Purpose:
Official Title:
Electrophysiological Recordings From Deep Brain Stimulation Electrodes for Pain
Anticipated Study Start Date :
Oct 30, 2023
Anticipated Primary Completion Date :
Dec 31, 2025
Anticipated Study Completion Date :
Dec 31, 2025

Arms and Interventions

Arm Intervention/Treatment
Experimental: DBS for Chronic Pain

Device: DBS for Chronic Pain
Participants ill receive deep brain stimulation to relieve their chronic pain symptoms.

Outcome Measures

Primary Outcome Measures

  1. Safety of DBS for Chronic Pain as Assessed by Incidence of Treatment-Related Adverse Events [2 years]

Secondary Outcome Measures

  1. Localized Brain Activity in Relation to DBS Effect [2 years]

Eligibility Criteria


Ages Eligible for Study:
22 Years and Older
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Inclusion Criteria:
  1. Patients who have intractable pain, as defined by: chronic (>1 year), severe (VAS score > 6/10), and persistent (not responsive to medication or relevant surgical options) without cognitive impairment or comorbidities affecting surgical risk.

  2. Patients that have been medically cleared for DBS surgery by the consensus committee.

  3. Not exhibiting significant distress, anxiety, or psychological disturbance that may be worsened due to externalized leads or potential complications or by study recording or tasks.

  4. Motorically and cognitively capable of completing evaluations and consent.

  5. Motorically and cognitively capable of participating in the study's computer-based tasks.

  6. Informed consent signed by the subject.

  7. Patient age between 22 to 75 years old.

Exclusion Criteria:
  1. Patients that are not a candidate for DBS. This may occur for example, if they are unable to properly operate the neurostimulator. Also, several medical procedures and studies are not compatible with DBS. These include diathermy, transcranial magnetic stimulation, MRI procedures using radio-frequency coils, electroconvulsive therapy. Patients are receiving these treatments or plan to receive them in the future will not be eligible. Also, the safety of DBS has not been established for patients with a previous surgical ablation, dementia, coagulopathies, moderate to severe depression, or patients who are pregnant. Patients with these conditions will also not be eligible. Finally, DBS may be affected by or may affect other medical devices including cardiac pacemakers/defibrillator, ultrasonic equipment, radiation therapy, and incomplete (abandoned) prior DBS systems. Patients with these conditions/devices will not be eligible for the study.

  2. Subjects who have pain that is not severe enough to be considered for DBS: shorter than 1 year duration, VAS score < 6/10), responsive to medication or relevant surgical options.

  3. Subjects deemed to have a psychiatric illness that would potentially interfere or cause undue stress during the awake implantation surgery, the 1-3 week stimulation trial period, or the long term care of the DBS system are ineligible to undergo the DBS implantation procedure and thus would not be able to participate in this trial.

Contacts and Locations


No locations specified.

Sponsors and Collaborators

  • St. Joseph's Hospital and Medical Center, Phoenix


None specified.

Study Documents (Full-Text)

None provided.

More Information


None provided.
Responsible Party:
St. Joseph's Hospital and Medical Center, Phoenix
ClinicalTrials.gov Identifier:
Other Study ID Numbers:
  • 22-500-326-30-06
First Posted:
Aug 31, 2023
Last Update Posted:
Aug 31, 2023
Last Verified:
Aug 1, 2023
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD:
Studies a U.S. FDA-regulated Drug Product:
Studies a U.S. FDA-regulated Device Product:
Additional relevant MeSH terms:

Study Results

No Results Posted as of Aug 31, 2023