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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/ct2/show/NCT03465163




Registration number
NCT03465163
Ethics application status
Date submitted
7/03/2018
Date registered
14/03/2018
Date last updated
27/10/2020

Titles & IDs
Public title
A Deep Brain Stimulation System in Epilepsy: Tracking Neural Excitability
Scientific title
Safety and Efficacy of a Deep Brain Stimulation System in Epilepsy: A Feasibility Study for Tracking Neural Excitability
Secondary ID [1] 0 0
HREC/17/SVHM/146
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Epilepsy 0 0
Nodular Heterotopia 0 0
Condition category
Condition code
Neurological 0 0 0 0
Epilepsy

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Treatment: Devices - Deep Brain Stimulation

No Intervention: Recovery - Two months recovery (no stimulation) following bilateral implantation of Medtronic PC+S devices into the anterior nucleus of the thalamus and the hippocampus. Thirty second EEG snapshots will be recorded every 15 minutes

No Intervention: Baseline - No stimulation, 30 second EEG snapshots recorded every 15 minutes We require a minimum of 5 seizures to occur during this phase.

Experimental: Probing - Deep Brain Stimulation Electrically stimulate the thalamus continuously at a low frequency (2Hz). Thirty second EEG snapshots recorded every 15 minutes.
We require a minimum of 5 seizures to occur during this phase.

Experimental: Probe Calibrated Deep Brain Stimulation - Deep Brain Stimulation In this phase we explore 18 deep brain stimulation parameter configurations (three stimulus intensities; 3,4,5 Volts, six different frequencies; 125 130, 135, 140,145, 150 Hz) during two of the clinic visits. Each deep brain stimulation parameter configuration will be tested for 1 minute with 4 minutes between each configuration test. The probing responses will be used to optimise the deep brain stimulation parameters for each participant. This phase of the study continues for 2 months.

Experimental: Open Deep Brain Stimulation - Deep Brain Stimulation During this phase the deep brain stimulation parameters may be altered from the probing optimised parameters according to patient needs.


Treatment: Devices: Deep Brain Stimulation
The device is called the Medtronic Activa PC+S system. Two devices will be implanted per participant. The electrodes will be surgically implanted bilaterally into the hippocampus and anterior nucleus of the thalamus.
Intervention code [1] 0 0
Treatment: Devices
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
Change in Seizure Rate
Timepoint [1] 0 0
Recorded throughout the baseline (2-4 months post implant) and probe calibrated DBS phase( 6-8 months post implant)
Secondary outcome [1] 0 0
Determine if probing responses provide a seizure susceptibility measure.
Timepoint [1] 0 0
Throughout probing phase (4-6 months post implant)
Secondary outcome [2] 0 0
Change in brain excitability following DBS treatment, assessed according to changes in probing response energy before and after stimulation therapy.
Timepoint [2] 0 0
Throughout probing phase (4-6 months post implant) and probe calibrated DBS phase (6-8 months post implant).

Eligibility
Key inclusion criteria
Patients with epilepsy with non-resectable pathologies, or clearly defined focal seizures
without a defined structural pathology.

Patients will be required to have a seizure diary (of up to 3 months) recording at least
five seizures per month that are well separated in time (at least 8 hours apart).
Minimum age
18 Years
Maximum age
No limit
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
Previous diagnosis of psychogenic/non-epileptic seizures

Study design
Purpose of the study
Device Feasibility
Allocation to intervention
Non-randomised trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Open (masking not used)
Who is / are masked / blinded?



Intervention assignment
Single group
Other design features
Phase
Not Applicable
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Completed
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
27/03/2018
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
1/07/2020
Sample size
Target
Accrual to date
Final
1
Recruitment in Australia
Recruitment state(s)
Victor
Recruitment hospital [1] 0 0
St Vincent's Hospital Melbourne - Melbourne
Recruitment postcode(s) [1] 0 0
3065 - Melbourne

Funding & Sponsors
Primary sponsor type
Other
Name
St Vincent's Hospital Melbourne
Address
Country
Other collaborator category [1] 0 0
Other
Name [1] 0 0
University of Melbourne
Address [1] 0 0
Country [1] 0 0

Ethics approval
Ethics application status

Summary
Brief summary
The main purpose of this research project is to evaluate the safety and effectiveness of a
surgically implanted device called the Medtronic Activa PC+S System in patients with
medically refractory epilepsy (people who have seizures that are not completely controlled by
medical therapy). The system sends small electrical pulses into a part of the brain called
the thalamus to help control seizures. It sends this signal in regularly, regardless of if a
seizure is occurring. A different version of this device is already approved for the
treatment of epilepsy in Australia. This study aims to use the brain's responses to single
pulse electrical stimulation to measure the level of seizure susceptibility. The
investigators would like to show that this measure can be used to provide more effective deep
brain stimulation therapies, to stop seizures.
Trial website
https://clinicaltrials.gov/ct2/show/NCT03465163
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for scientific queries