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Bilateral Internal Pallidum Stimulation in Primary Generalized Dystonia

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00272246
Recruitment Status : Unknown
Verified January 2006 by Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA).
Recruitment status was:  Recruiting
First Posted : January 5, 2006
Last Update Posted : January 5, 2006
Princess Beatrix Muscle Foundation
Information provided by:
Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)

Tracking Information
First Submitted Date  ICMJE January 4, 2006
First Posted Date  ICMJE January 5, 2006
Last Update Posted Date January 5, 2006
Study Start Date  ICMJE February 2005
Primary Completion Date Not Provided
Current Primary Outcome Measures  ICMJE
 (submitted: January 4, 2006)
change in BFMDRS-motor score from baseline to six months after stimulation equipment implantation
Original Primary Outcome Measures  ICMJE Same as current
Change History No Changes Posted
Current Secondary Outcome Measures  ICMJE
 (submitted: January 4, 2006)
  • BFMDRS-disability score
  • MOS-SF-36 (Medical Outcome Scale)
  • GOS (Global Outcome Scale)
  • Neuropsychological and neuropsychiatric validated scales
  • Questionnaire designed for the registration of the number and extent of morbidity due to the surgical
  • procedure, stimulation equipment and active stimulation
Original Secondary Outcome Measures  ICMJE Same as current
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE Bilateral Internal Pallidum Stimulation in Primary Generalized Dystonia
Official Title  ICMJE Not Provided
Brief Summary Primary generalized dystonia, also called idiopathic torsion dystonia or dystonia musculorum deformans is a disabling neurological condition which usually starts in childhood, mostly in a lower limb and spreads to other body parts as the disease progresses. Medical treatment is usually ineffective and most patients become wheelchair bound or even bedridden. Recently several case series and one RCT reported favourable results of bilateral deep brain stimulation (DBS) of the globus pallidus internus (GPi) for primary generalized dystonias. However, the number of patients treated with bilateral GPi stimulation is still limited. Therefore, we propose a RCT to investigate whether bilateral DBS of the GPi is an effective and safe treatment in patients with primary generalized dystonia.
Detailed Description

Study design and methods:

This is a randomised, double-blind, placebo-controlled, multicentre study comparing the effect of bilateral DBS of the GPi with placebo in patients with invalidating primary generalized dystonia. After inclusion in the study (see in/exclusioncriteria), a preoperative formal baseline assessment is performed. Within six weeks after the inclusion the patients undergo the stereotactic implantation of the stimulation equipment in the GPi. Immediately after surgery the patients are randomly allocated to direct stimulation (treatment group) or delayed stimulation (control group), in which the stimulator will se switched on 0 Volt before discharge from the hospital by an independent neurologist or neurosurgeon. The patients in both groups are able to control whether the stimulation is active (>0 Volt) or not. In this way the patients and the assessors are blinded. In each centre the postoperative care of the patients will take place according to a stratified stimulation parameter protocol which assures comparable information in both groups. Six months postoperatively, the first formal outcome assessment is performed by the same blinded assessor. After completion of this assessment the stimulators in the control group are activated by an independent neurologist or neurosurgeon. From this moment, all 24 patients have active DBS. However, the patients and blinded assessor remain unaware of the result of the randomisation. All patients are followed for another six months after which the second outcome assessment is made by the same assessor. Four Dutch centres experienced in DBS have agreed to participate in the study. It is estimated that each centre will include at least 4 patients. Because these centra are geographically spread over the country patients can be operated and controlled nearby.

Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 2
Phase 3
Study Design  ICMJE Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Condition  ICMJE
  • Dystonia
  • Primary Generalized Dystonia
Intervention  ICMJE Procedure: deep brain stimulation of the internal globus pallidus
Study Arms  ICMJE Not Provided
Publications * Foncke EM, Speelman JD. [Primary generalized dystonia and deep brain stimulation: a randomized, placebo-controlled, double-blind, multicentre study]. Ned Tijdschr Geneeskd. 2005 May 14;149(20):1123-4. Dutch.

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Unknown status
Enrollment  ICMJE
 (submitted: January 4, 2006)
Original Enrollment  ICMJE Same as current
Study Completion Date  ICMJE December 2007
Primary Completion Date Not Provided
Eligibility Criteria  ICMJE

Inclusion Criteria:

  1. Invalidating primary generalized dystonia (BFMDRS-motor part >= 35)
  2. Disease duration >= 5 yrs
  3. Age at surgery between 12 and 60
  4. Insufficient improvement with pharmacological and physical therapy
  5. Signed informed consent, for patients < 19 yrs of age a written consent of the parent(s) or caretaker(s) is needed.

Exclusion Criteria:

  1. Mental retardation or dementia (MMSE <24)
  2. Depressive state (HADS>21)
  3. History of former stereotactic brain surgery
  4. Severe brain atrophy
  5. General surgical contraindications, such as uncontrolled hypertension or diabetes mellitus, cardiovascular or pulmonary risks, disturbances of bloodclotting.
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 12 Years to 60 Years   (Child, Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Netherlands
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT00272246
Other Study ID Numbers  ICMJE DYSPAS
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party Not Provided
Study Sponsor  ICMJE Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
Collaborators  ICMJE Princess Beatrix Muscle Foundation
Investigators  ICMJE
Study Chair: Hans Speelman, PhD Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
PRS Account Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
Verification Date January 2006

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP