BION Implantable Microstimulator
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 30
- 试验地点
- 2
- 主要终点
- passive Range of Motion, active Range of Motion, Rancho Arm Function Scale, Fugl Meyer Function Scale
研究概览
简要总结
The study looks at a new treatment for wrist and finger contractures -- a condition where the affected hand is in a "closed" position, with the wrist and fingers stiff and difficult to move from that position. We want to study if stimulation of wrist and finger muscles using an implanted neuromuscular stimulator (BION) will be more or less effective than doing passive exercises of the affected hand to improve the range of movement at wrist and finger joints. Subjects of this study will be randomized into one of three groups: one doing passive movement therapy; one receiving surface stimulation (electrical stimulation with electrodes on the skin of the arm) and one doing BION® therapy. The passive movement group will do therapy for 12 weeks. Subjects in either stimulation group will receive stimulation for 6 weeks and then only passive therapy for 6 weeks.
详细描述
BION™ Experimental Group
Following implantation, the patients receiving BIONs will have a 3 to 7 day healing period. During this period, subjects will not receive active therapy. At the end of this healing period, subjects will come to the testing center so that the examiner can program the exercise patterns. They will be instructed to increase the strength of their muscle contractions as tolerance permits. The goal for the BION™ patients is to achieve 30 minutes of stimulation twice daily, using a cycled stimulation at frequencies adequate to produce tetanic contraction, (typically 25-35 pps) that raises the joint through full range of motion against gravity (a range graded as 3/5) based on the available range of motion. The intensity, duration and frequency of the exercise program will be modified according to the progress of the participant, so that the strength of the contraction is increased over time.
Surface Stimulation Group
Patients will be instructed to stimulate twice daily for 30 minutes through surface electrodes placed according to instructions that the subject has been given. Stimulus parameters will be similar to those reported in earlier successful stimulation studies. The parameters should achieve a tetanic contraction that raises the joint through full range of motion against gravity (graded 3/5) based on the patient's available range of motion, and cycled, typically at 25-35 pps, using stimulus ramps as necessary so that contractions are smoothly graded and comfortable. Every effort will be made to ensure that the parameters needed in this group are chosen to produce a similar type of contraction to that obtained with BION™ stimulation.
Control Group with conservative therapy (Range of motion exercises)
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 85 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Diagnosis of hemiplegic stroke 6 months to 20 years prior to enrollment in this study;
- •Paresis of extensors in the forearm;
- •Demonstrable restriction of hand or wrist mobility (i.e. significant stretch response, defined as a 2+ or greater on the Ashworth scale, can be elicited in the finger or wrist flexor muscles, and the patient's resting hand posture is flexed when the patient is standing with the upper arm pendant and the elbow flexed);
- •Age 18 years or older;
- •Stable pattern of pain-medication use for at least one month prior to enrollment;
- •Medically stable;
- •Able to travel to the testing center;
- •Mentally capable to understand and carry out the procedures and communicate concerns; and
- •Able and willing to participate and provide informed consent.
- •Ability to bring the wrist into neutral posture and the MCP joints into 30 degrees of flexion
排除标准
- •Pregnant, nursing, or planning to become pregnant within the study timeframe;
- •Presence of electronic implants (e.g., cardiac pacemaker, cochlear implant, neurostimulator, etc.);
- •Presence of metallic implants, such as artificial elbow implants or metal screws, in the immediate field of the magnetic coil (on the arm between the fingers and the shoulder).
- •Use of electrical stimulation for treatment of relevant extensor muscles in the past month;
- •Inability to recruit muscles through surface electrical stimulation because of excessive adipose tissue;
- •Presence of other unrelated hand or wrist pathologies; participating in other treatments including active physical therapy or drug therapy that affect their hand or wrist.
- •Severe hemineglect; and
- •Cancer or other serious illness, including a disease other than stroke resulting in motor dysfunction.
结局指标
主要结局
passive Range of Motion, active Range of Motion, Rancho Arm Function Scale, Fugl Meyer Function Scale
时间窗: baseline, 2 weeks, 4 weeks and 6 weeks
次要结局
未报告次要终点
研究者
Gerald E. Loeb, M.D.
Professor
University of Southern California