Effects of Microelectrode-based Brain Stimulation in Humans (HDBS)
Studie Overzicht
Toestand
Toestand
Conditie
Conditie
Interventie / Behandeling
Interventie / Behandeling
Gedetailleerde beschrijving
The primary objective of this early feasibility clinical investigation is reached if any of the tested subgroups/sites enable powerful therapeutic effects with minimal adverse effects in a patient. A continuous assessment is made as data from different patients accumulate over time to enable an estimation of the success rate.
To address the secondary objective, areas from which appropriate effects are elicited are marked with green and inappropriate areas are marked with red on the last page of the Case Report Form (CRF) for each stimulation depth to provide an overview of the results for each individual patient. This is compared to results obtained from the subsequent evaluation of different contacts on the permanent DBS 3-8 weeks after surgery to assess to what extent the mapping using HDBS can predict DBS outcomes.
Studietype
Studietype
Inschrijving (Geschat)
Inschrijving
Fase
Fase
- Niet toepasbaar
Contacten en locaties
Studiecontact
Studiecontact
- Naam: Jens Schouenborg, PhD
- Telefoonnummer: +46702924572
- E-mail: jens.schouenborg@med.lu.se
Studie Contact Back-up
- Naam: Hjalmar Bjartmarz, MD
- Telefoonnummer: +46705343055
- E-mail: hjalmar.bjartmarz@skane.se
Studie Locaties
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Skåne County
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Lund, Skåne County, Zweden, SE-12185
- Skane University Hospital
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Contact:
- Hjalmar Bjartmarz, MD
- Telefoonnummer: +46705343055
- E-mail: hjalmar.bjartmarz@skane.se
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Contact:
- Hakan Widner, MD
- Telefoonnummer: +4646171000
- E-mail: hakan.widner@skane.se
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Hoofdonderzoeker:
- Hjalmar Bjartmartz, MD
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Deelname Criteria
Geschiktheidscriteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
- Oudere volwassene
Accepteert gezonde vrijwilligers
Beschrijving
Inclusion Criteria:
- The target population for the clinical device to be investigated are adult patients with Parkinson's disease or essential tremor that are already scheduled for permanent implantation of devices for deep brain stimulation. This implies that these patients are an already selected group of patients deemed to be appropriate patients for DBS.
- Patients that are fully capable of understanding the patient information.
- Patients that accept to be awake during the investigation
- Patients that accept to be video-filmed during the investigation.
Exclusion Criteria:
- Patients that do not accept to be awake during the stimulation procedure.
- Patients for which the intended extension of surgery time (up to 2,5 hours) is considered by the neurosurgeon to be an unacceptable risk.
- Patients with a known history of blood clotting disorder.
- Patients with a known history of bleeding disorder.
- Patients under age 18.
- Pregnant women and women that are breast feeding.
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Behandeling
- Toewijzing: NVT
- Interventioneel model: Opdracht voor een enkele groep
- Masker: Geen (open label)
Aantal wapens
Wapens en interventies
Deelnemersgroep / ArmDeelnemersgroep / Arm |
Interventie / BehandelingInterventie / Behandeling |
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Experimenteel: High Definition Brain Stimulation
The investigational device, comprising multiple microelectrodes, will be stereotactically inserted into the brain of awake patients in the same track as planned for the established Deep Brain Stimulation (DBS) electrode.
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The investigational device will be inserted into the brain of awake patients in the same track as planned for the established Deep Brain Stimulation (DBS) electrode.
The evaluation will follow a protocol that includes stimulation of predetermined subsets of microelectrodes at up to 4 predetermined levels (depth) in the brain.
The stimulation intensity for each subgroup is gradually increased until either a therapeutic effect or an undesirable side effect has been achieved.
If an unacceptable effect is elicited, stimulation is immediately interrupted and a new subset of electrodes is tested.
After completion of the evaluation, the investigational device will be removed and the implantation of an established permanent DBS electrode is completed.
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Wat meet het onderzoek?
Primaire uitkomstmaten
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Changes in motor performance during microelectrode based deep brain stimulation
Tijdsspanne: 2.5 hours
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Primary outcome measure is, for each combination of stimulation sites (i.e. subgroup of stimulated microelectrodes), an aggregated outcome measure based on the following components:
For each combination of stimulation sites, the (aggregated) primary outcome measure is either 1 or 0, depending on whether or not a powerful therapeutic effect with minimal unwanted side effects is reached. |
2.5 hours
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Secundaire uitkomstmaten
Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Success rate
Tijdsspanne: 2.5 hours
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• Number of patients, expressed as percentage of all tested patients, for which it was possible to substantially reduce recorded symptoms with minimal unwanted side effects.
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2.5 hours
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Thresholds for beneficial effects
Tijdsspanne: 2.5 hours
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If possible, for each combination of stimulation sites, a threshold expressed in micro-Amps per pulse for at least one of the following effects will be documented: 1) beneficial effects on one symptom, and 2) potent relief of one symptom. If no beneficial effect/potent relief is achieved for a particular combination of stimulation sites this will also be documented. |
2.5 hours
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Aggravation of already existing symptoms
Tijdsspanne: 2.5 hours
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Unwanted side effects, consisting in aggravation of existing symptoms by the stimulation. These include increased tremor estimated using ETRS for patients with Essential tremor and worsened PD symptoms (tremor and rigidity) rated using the UPDRS (item III) instrument. Both instruments use a scale from 0 to 4 where a lower score is better. These outcome measures are documented together with stimulation intensity (in micro-Amps) and respective subgroup of microelectrodes used. |
2.5 hours
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Other unwanted side effects for PD and ET patients:
Tijdsspanne: 2.5 hours
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Other unwanted side effects than aggravated PD/ET symptoms, such as verbal responses, gestures, slurring of speech, dystonia or facial expressions are documented and scored as zero (score=0), mild (score=1), moderate (score=2) and severe (score=3).
These outcome measures of unwanted side-effects are documented together with stimulation intensity (in micro-Amps), respective subgroup of microelectrodes used (i.e. the stimulated brain sites).
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2.5 hours
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Effects of DBS
Tijdsspanne: 8 hours
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Recordings of therapeutic and unwanted side effects caused by stimulation of each of the different contacts on the implanted established DBS electrodes 3-8 weeks after surgery.
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8 hours
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Andere uitkomstmaten
Andere uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
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Other observations
Tijdsspanne: 2.5 hours
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Explorative outcomes: Other observations, such as patient-reported effects on perception, thoughts, emotions during the evaluation, will be documented.
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2.5 hours
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Medewerkers en onderzoekers
Sponsor
Sponsor
Medewerkers
Medewerkers
Onderzoekers
Onderzoekers
- Studie directeur: Jens Schouenborg, PhD, Lund University, Lund, Sweden
Publicaties en nuttige links
Algemene publicaties
- Goetz CG, Fahn S, Martinez-Martin P, Poewe W, Sampaio C, Stebbins GT, Stern MB, Tilley BC, Dodel R, Dubois B, Holloway R, Jankovic J, Kulisevsky J, Lang AE, Lees A, Leurgans S, LeWitt PA, Nyenhuis D, Olanow CW, Rascol O, Schrag A, Teresi JA, Van Hilten JJ, LaPelle N. Movement Disorder Society-sponsored revision of the Unified Parkinson's Disease Rating Scale (MDS-UPDRS): Process, format, and clinimetric testing plan. Mov Disord. 2007 Jan;22(1):41-7. doi: 10.1002/mds.21198.
- Fahn S, Tolosa E, Marin C. Clinical rating scale for tremor. In: Jankovic J, Tolosa E, eds. Parkinson's Disease and Movement Disorders. 2nd ed. Baltimore, MD: Williams & Wilkins; 1993:225-234.
Studie record data
Bestudeer belangrijke data
Studie start (Geschat)
Studie start
Primaire voltooiing (Geschat)
Primaire voltooiing
Studie voltooiing (Geschat)
Studie voltooiing
Studieregistratiedata
Eerst ingediend
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Eerst geplaatst
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update geplaatst
Laatste update ingediend die voldeed aan QC-criteria
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
Andere studie-ID-nummers
- CIV-ID 25-10-054717
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
Beschrijving IPD-plan
Summary data will be made available via ClinicalTrials.gov within 1 year of the study's conclusion.
Individual participant data underlying the results in a publication will be anonymized and will be available with a publication to the extent that they do not allow identification of individual participants. The study is a first in human early feasibility investigation with a small number of participants. This means that only limited individual data can be shared without identifying participants.
IPD-tijdsbestek voor delen
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct
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