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Scalar Closed Loop Intraoperative Study

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ClinicalTrials.gov Identifier: NCT03270657
Recruitment Status : Enrolling by invitation
First Posted : September 1, 2017
Last Update Posted : June 1, 2018
Sponsor:
Information provided by (Responsible Party):
Duke University

Study Description
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Brief Summary:
The purpose of this study is to measure neural activity during deep brain stimulation (DBS). There are two types of neural activity that we will record from DBS electrodes during this study: DBS local evoked potentials (DLEPs) and spontaneous, local field potentials (LFPs). We will measure the effects of varying stimulation parameters on both the neural activity and changes in motor symptoms -- bradykinesia and tremor -- in subjects with Parkinson's disease (PD). Correlating neural activity characteristics with changes in symptoms will improve our understanding of the mechanisms of action of DBS. This intraoperative study will specifically compare our ability to record neural activity using circuitry developed at Duke for this purpose [Kent et al, 2015] to a new, implanted pulse generator (IPG; RC+S) developed by Medtronic. These intraoperative studies will specifically test a preliminary version of the RC+S (that is not designed for implantation), and will lead to a clinical trial assessing the efficacy of the implantable RC+S IPG in PD patients once this device is available and approved for this trial.

Condition or disease Intervention/treatment Phase
Parkinson Disease Device: IPG; RC+S Not Applicable

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Study Design
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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 32 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Other
Official Title: Scalar Closed-Loop STN/GPi DBS Based on Evoked and Spontaneous Potentials (Intraoperative Studies)
Actual Study Start Date : April 5, 2018
Estimated Primary Completion Date : February 27, 2022
Estimated Study Completion Date : February 27, 2022

Resource links provided by the National Library of Medicine


Arms and Interventions
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Arm Intervention/treatment
IPG; RC+S
Subjects will be recruited and enrolled from individuals who have Parkinson's disease (PD) and who are scheduled to already undergo the planned deep brain electrode placement for treatment of their movement disorder.This intraoperative study will specifically compare our ability to record neural activity using circuitry developed at Duke for this purpose [Kent et al, 2015] to a new, implanted pulse generator (IPG; RC+S) developed by Medtronic. These intraoperative studies will specifically test a preliminary version of the RC+S (that is not designed for implantation), and will lead to a clinical trial assessing the efficacy of the implantable RC+S IPG in PD patients once this device is available and approved for this trial.
 Device: IPG; RC+S
We will measure the effects of varying stimulation parameters on both the neural activity and changes in motor symptoms -- bradykinesia and tremor -- in subjects with Parkinson's disease (PD)


Outcome Measures
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Primary Outcome Measures :
  1. Accurately record evoked signals from DBS electrodes during DBS for Parkinson's Disease. [ Time Frame: End of procedure, approximately 45 minutes ]
    This intraoperative study will specifically compare our ability to record neural activity using circuitry developed at Duke for this purpose [Kent et al, 2015] to a new, implanted pulse generator (IPG; RC+S) developed by Medtronic. These intraoperative studies will specifically test a preliminary version of the RC+S (that is not designed for implantation), and will lead to a clinical trial assessing the efficacy of the implantable RC+S IPG in PD patients once this device is available and approved for this trial.


Secondary Outcome Measures :
  1. Measure DBS local evoked potentials (DLEPs) [ Time Frame: End of procedure, approximately 45 minutes ]
    The DLEP recordings will be serially averaged with stimulus-triggering to remove random noise while preserving the evoked response. The signal-to-noise ratios of DLEP recordings will be compared across data sets to determine which combination of stimulation and recording sites maximize recording quality.

  2. Measure spontaneous, local field potentials (LFPs) [ Time Frame: End of procedure, approximately 45 minutes ]
    We will measure the effects of varying stimulation parameters on both the neural activity and changes in motor symptoms -- bradykinesia and tremor -- in subjects with Parkinson's disease (PD). Correlating neural activity characteristics with changes in symptoms will improve our understanding of the mechanisms of action of DBS. The data set will consist of recordings of neural and/or LFP recordings, and either mouse click timing data for measurement of bradykinesia in Parkinson's disease subjects or tremor accelerometry data for patients with Parkinson's disease


Eligibility Criteria
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Ages Eligible for Study:   18 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Parkinson's disease (PD) patients who are scheduled to already undergo the planned deep brain electrode placement for treatment of their movement disorder at Duke University Medical Center.
  • Able to understand the study and consent form, and interested in proceeding with research during the invasive brain surgery to receive a DBS system for treatment of PD.

Exclusion Criteria:

  • Inability to execute the motor tasks during the study.
Contacts and Locations
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Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03270657


Locations
United States, North Carolina
Duke University Medical Center
Durham, North Carolina, United States, 27710
Sponsors and Collaborators
Duke University
Investigators
Principal Investigator: Dennis Turner, M.D. Duke University
More Information
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Responsible Party: Duke University
ClinicalTrials.gov Identifier: NCT03270657     History of Changes
Other Study ID Numbers: Pro00085076
First Posted: September 1, 2017    Key Record Dates
Last Update Posted: June 1, 2018
Last Verified: May 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: Yes
Device Product Not Approved or Cleared by U.S. FDA: Yes
Pediatric Postmarket Surveillance of a Device Product: No
Product Manufactured in and Exported from the U.S.: No

Keywords provided by Duke University:
Deep Brain Stimulation

Additional relevant MeSH terms:
Parkinson Disease
Parkinsonian Disorders
Basal Ganglia Diseases
Brain Diseases
 Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Neurodegenerative Diseases