Effects of Ascending and Descending Direct Current on Grip Strength. Evaluation Through Dynamometry and Myofeedback. Randomized, Controlled Trial.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 87
- 试验地点
- 2
- 主要终点
- Difference of Maximum Electromiographic Activation Threshold
研究概览
简要总结
Electrical stimulation currently has a wide range of clinical applications, being used for activities such as strengthening, pain control, edema management, or inflammation control after injury or surgery. One of the classic forms of electrotherapy is the Direct current (galvanic current), which stands out for its unique effects (polar and interpolar effects) and that are not achieved with other modalities of electrotherapy. Within these effects those activators or suppressors of nervous system activity are described. One of the applications of direct current is to produce sedation or excitation on the nervous system through longitudinal applications (longitudinal galvanization). This application technique is known as the upstream or downstream effect of the direct current or "Leduc Effect", in which it is postulated that an ascending type longitudinal galvanization has excitation effects of the central and / or peripheral nervous system. The study will evaluate the influence of the upward and downward direct current effect when performing a manual dynamometer test while monitoring by miofeedback in college students.
详细描述
Methodological Design
- Type of research: Experimental study, of type randomized clinical trial (RCT).
- Conceptual definition of the variables;
- Ascending effect: Excitation effect on the nervous system by a longitudinal direct current application (Longitudinal Galvanization), in which the anode is placed at the distal level and the cathode at the cranial level.
- Descending effect: Sedative effect on the nervous system by a longitudinal direct current application (Longitudinal Galvanization), in which the anode is placed at the cranial level and the cathode at the distal level.
- Placebo: Phenomenon by which a patient's symptoms can be improved by treatment with a safe substance, ie a substance with no effects directly related to the treatment of symptoms or illness (a placebo will be applied in a control group).
- Operational definition of variables;
- Maximum Handgrip strength: Maximum Strength in kilograms evaluated through manual dynamometry test the time for a grip. Force values are recorded in an Excel table displaying data in kilograms evaluated. (Manual hydraulic dynamometer brand JAMAR® be used).
- Maximum activation threshold: measured in microvolts (μV) by a miofeedback device on the muscular belly of the dominant forearm in the flexopronator muscles. The GYMNA® electrotherapy equipment model MYO 200 were used.
- Direct upnstream current (Ascending Effect): it were applied through an electric direct current quantified in milliamps (mA) in a longitudinal galvanizing technique with the catode electrode in proximal position. The GYMNA® electrotherapy equipment model COMBI 500 were used.
- Direct downstream current (Descending effect): it were applied through an electric direct current quantified in milliamps (mA) in a longitudinal galvanizing technique with the anode electrode in proximal position. The GYMNA® electrotherapy equipment model COMBI 500 were used.
- Placebo: was applied through a circuit switched off (sham intervention). The GYMNA® electrotherapy equipment model COMBI 500 were used.
- Definition of the type of variable;
- Maximum Handgrip strength: dependent, quantitative, reason variable.
- Maximum activation threshold: dependent variable, quantitative, reason variable.
- Direct upstream current (Ascending effect): independent variable, qualitative, nominal variable.
- Direct downstream current (Descending effect): independent variable, qualitative, nominal variable.
- Placebo: independent variable, qualitative, nominal variable.
- Place of research;
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
- Triple (Participant, Care Provider, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Students of the Faculty of Rehabilitation Sciences.
- •Participants older than 18 years of age.
- •Participants who do not show discomfort or pain when performing manual grip in the dominant hand.
排除标准
- •Musculoskeletal pathologies of hand, wrist or elbow in the last 6 months.
- •Materials of osteosynthesis or prosthesis in areas of application.
- •Peripheral neurological pathologies such as or nerve compression cuts.
- •Sensitivity alterations such as hypoesthesia, anesthesia or hyperesthesia in the upper limbs.
- •Alterations in the skin of the application areas, such as burns, wounds, scars.
- •Apprehension or fear of the application of electrotherapy.
- •Non-completion of the evaluation / intervention protocol, designed for the study or abandonment of the same.
结局指标
主要结局
Difference of Maximum Electromiographic Activation Threshold
时间窗: Baseline and 1 hours later (1 session of treatment), assessed as up to 1 month.
Comparing maximum Electromiographic Activation pre and post application of upward and downward direct current intervention
Difference of Maximum handgrip force
时间窗: Baseline and 1 hours later (1 session of treatment), assessed as up to 1 month.
Comparing maximum handgrip strength pre and post application of upward and downward direct current intervention
次要结局
未报告次要终点
研究者
Hernán Andrés de la Barra Ortiz
Principal Investigator and Clinical Professor
Quiropraxia y Equilibrio