Battery-preserving Stimulation Patterns for Deep Brain Stimulation

NCT ID: NCT02569021

Last Updated: 2016-10-24

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

30 participants

Study Classification

OBSERVATIONAL

Study Start Date

2014-05-31

Study Completion Date

2016-09-30

Brief Summary

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The purpose of this research study is to test effectiveness of different deep brain stimulation (DBS) stimulation patterns on symptoms that may also improve the life of the battery. If these patterns are effective, the implanted batteries will be drained more slowly and last longer than currently expected. An increase in battery life may reduce the number of surgeries needed to replace them.

Detailed Description

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Deep brain stimulation (DBS) is an effective surgical therapy for medication-refractory symptoms of Parkinson's disease, tremor, and dystonia. Patients implanted with DBS experience a significant improvement of their symptoms with relatively low risk of intolerable side effects. Implanted patients must undergo repeat surgeries to replace the Implantable Pulse Generators/batteries (IPG) approximately every 2 to 5 years. The DBS program (at the University of Florida) has studied battery consumption and has been interested in potential strategies to extend the life of the IPG to reduce the need for frequent battery replacement surgeries, while improving symptom-relief, patient satisfaction, and the potential associated financial burdens.

The research study will evaluate the effects of novel stimulation patterns on tremor, bradykinesia, rigidity and gait in Parkinson's disease and essential tremor patients.

Conditions

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Parkinsons Disease Essential Tremor

Study Design

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Observational Model Type

CASE_ONLY

Study Time Perspective

PROSPECTIVE

Study Groups

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Biphasic DBS stimulations

Subjects in this group will have Biphasic DBS stimulation setting performed, Unified Parkinson's Disease Rating Scale (UPDRS), Tremor Rating Scale (TRS), kinesia accelerometer assessment, Trigno wireless system (EMG) assessment and GaitRite walking assessment performed.

Biphasic DBS stimulation

Intervention Type DEVICE

The following protocol will be followed for each subject. In between, baseline and novel stimulation settings there will be a 30-minute washout period with DBS in the off state.

1. Current best/optimized DBS setting (considered "baseline")
2. DBS off for 30 minutes as a washout period
3. Biphasic pulse stimulation mode (assessment at 0.5hr)
4. Biphasic pulse stimulation mode (assessment at 1hr)
5. Biphasic pulse stimulation mode (assessment at 2hr)
6. Biphasic pulse stimulation mode (assessment at 3hr)

Unified Parkinson's Disease Rating Scale

Intervention Type OTHER

UPDRS is used by neurologists to rate the motor impairment of people with Parkinson's Disease.

Tremor Rating Scale

Intervention Type OTHER

TRS is used by neurologists to rate the severity of a tremor.

Kinesia accelerometer

Intervention Type DEVICE

The kinesia accelerometer is used to analyze the tremor and slowness (bradykinesia) of the participants.

Trigno wireless system

Intervention Type DEVICE

The Trigno system measure muscle contractions.

GaitRite walking assessment.

Intervention Type OTHER

GaitRite records a patients gait pattern.

Interventions

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Biphasic DBS stimulation

The following protocol will be followed for each subject. In between, baseline and novel stimulation settings there will be a 30-minute washout period with DBS in the off state.

1. Current best/optimized DBS setting (considered "baseline")
2. DBS off for 30 minutes as a washout period
3. Biphasic pulse stimulation mode (assessment at 0.5hr)
4. Biphasic pulse stimulation mode (assessment at 1hr)
5. Biphasic pulse stimulation mode (assessment at 2hr)
6. Biphasic pulse stimulation mode (assessment at 3hr)

Intervention Type DEVICE

Unified Parkinson's Disease Rating Scale

UPDRS is used by neurologists to rate the motor impairment of people with Parkinson's Disease.

Intervention Type OTHER

Tremor Rating Scale

TRS is used by neurologists to rate the severity of a tremor.

Intervention Type OTHER

Kinesia accelerometer

The kinesia accelerometer is used to analyze the tremor and slowness (bradykinesia) of the participants.

Intervention Type DEVICE

Trigno wireless system

The Trigno system measure muscle contractions.

Intervention Type DEVICE

GaitRite walking assessment.

GaitRite records a patients gait pattern.

Intervention Type OTHER

Other Intervention Names

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UPDRS TRS

Eligibility Criteria

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Inclusion Criteria

* Diagnosis of Parkinson's disease or Essential Tremor by strict criteria
* Deep brain stimulation (DBS) already implanted
* Optimized Deep brain stimulation (DBS) settings (or at least 4 months of DBS programming)

Exclusion Criteria

* Other neurological diagnoses (co-existent Alzheimer's or ALS)
* No Deep brain stimulation (DBS)
* less than 4 Deep brain stimulation (DBS) programming
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Florida

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Micheal Okun, M.D.

Role: PRINCIPAL_INVESTIGATOR

University of Florida

Locations

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Center for Movement Disorders and Neurorestoration

Gainesville, Florida, United States

Site Status

Countries

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United States

Other Identifiers

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IRB201501030

Identifier Type: -

Identifier Source: org_study_id

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