Probabilistic Targeting of the VIM

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追踪信息

首次提交日期 ^ICMJE

October 3, 2018

首次发布日期e ^ICMJE

October 4, 2018

最后更新发布日期

October 4, 2018

预计研究开始日期 ^ICMJE

October 2018

预计主要完成日期

October 2020 (主要结果测量的最终数据收集日期)

目前主要观察指标 ^ICMJE

Euclidian distance between the predicted target and the center of the active contact of the DBS lead[ Time Frame: 6 month after DBS surgery ]

Euclidian distance in milimeter measured on the fusion between post-operative CT-scan and pre-operative MRI.

原始主要观察测量 ^ICMJE

与当前相同

目前的二级观察 ^ICMJE

[ Time Frame: ]

描述性信息

简略标题 ^ICMJE

Probabilistic Targeting of the VIM

正式标题 ^ICMJE

Probabilistic Determination of the Ventro-intermediate Nucleus of the Thalamus (VIM) Coordinates From Radio-anatomical Landmarks on 1.5 Tesla MRI

简要概况

After having included the most improved patients by DBS among those implanted in Bordeaux Hospital University, and having defined the most active plots on tremor by its prospective grading on Fahn-Tolosa-Marin (FTM) scale and accelerometry, coordinates of active plots and landmarks will be calculated on post-operative imaging. Association between landmarks and active plots coordinates will be modelled with machine-learning algorithms. The aim is to retrieve the position of the VIM on the basis of the landmarks coordinates.

详细说明

The intermedius ventralis nucleus of the thalamus (VIM), which represents the target for deep brain stimulation (DBS) in essential tremor, still remains invisible to imaging in spite of the development of new MR sequences. The coordinates currently used in the classical (ACPC) system are so imprecise that per-operative electrophysiology is mandatory to locate the exact position of this target. Micro-electrode recordings (MER) however improve hemorrhagic risk and may be poorly tolerated by patients operated on 7 to 8 hours under local anaesthesia. To our knowledge, no one tried to retrieve the position of the VIM from anatomical landmarks coordinates in the era of MRI. The patients operated will be clinically tested to define those very well improved by the stimulation. Stimulation efficacy will be assessed by comparing the clinical evaluation (FTM scale) with and without stimulation, and the four contacts of each electrode will be tested clinically, with an accelerometer and an electromyography to determine which one is the most active on tremor. Coordinates of the anatomical landmarks will be calculated on the pre-operative MRI and those of the active plots on the fusion between post-operative CT-scan and pre-operative MRI. These coordinates will be analysed by machine-learning algorithms to create a model predicting the position of the active contacts from the coordinates of the landmarks.

研究类型 ^ICMJE

Observational

研究阶段

研究设计 ^ICMJE

分配:
干预模型:
干预模型描述:
盲法: Observational
盲法描述:
主要目的:

适用条件 ^ICMJE

干预项目 ^ICMJE

Other: Coordinates of active plots and VIM landmarks calculation
Stimulation efficacy will be assessed by comparing, according to usual care, the clinical evaluation (FTM scale) with and without stimulation, and the four contacts of each electrode will be tested clinically, with an accelerometer and an electromyography to determine which one is the most active on tremor. Coordinates of the anatomical landmarks will be calculated on the pre-operative MRI and those of the active plots on the fusion between post-operative CT-scan and pre-operative MRI.

研究工具

: DBS surgery targeting the VIM
Patient who underwent a DBS surgery targeting the VIM at Bordeaux University Hospital

招募信息

招募状态 ^ICMJE

Not yet recruiting

预计入组 ^ICMJE

原始预计入组 ^ICMJE

与当前相同

预计研究完成日期

October 2020

预计主要完成日期

October 2020 (主要结果测量的最终数据收集日期)

合格标准 ^ICMJE

Inclusion Criteria: - patient older than 18 years - who underwent a DBS surgery targeting the VIM at Bordeaux University Hospital - in the strict indication of the essential tremor - with an excellent post-operative result defined by a complete withdrawal of medication, a stability of the stimulation effects without any setting adjustments since at least 3 months and an improvement of more than 66% on the FTM scale between OFF and ON-stimulation assessments. Exclusion Criteria: - patients who underwent a DBS surgery targeting the VIM for different indications (Parkinson's disease for instance), patients with a poor post-operative efficacy

性别

参与研究的性别:

All

年龄

最小年龄：18 Years ，最大年龄：N/A

接受健康的志愿者

没有

可入组国家 ^ICMJE

France

管理信息

数据检测委员会

研究涉及美国FDA监管的产品

研究美国FDA监管的药品: No
研究涉及美国FDA监管的设备产品: No

IPD 共享声明

计划分享 IPD:

责任方

，

研究赞助商 ^ICMJE

University Hospital, Bordeaux

合作者 ^ICMJE

研究员 ^ICMJE

Study Chair: Nejib ZEMZEMI, MD-PhD Inria Bordeaux Sud-Ouest

PRS 账户

验证日期

October 2018

^ICMJE 国际医学期刊编辑委员会和世界卫生组织 ICTRP 要求的元素

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