- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01553487
Effects Of Unilateral Forearm Vibration On The Loss Of Muscle And Bone Of Contralateral Forearm (Vib-Frx)
Effects Of Unilateral Forearm Vibration On The Loss Of Muscle Strength And Bone Of The Contralateral Forearm Due to Forearm/Elbow Fracture
The aim of the present study is to investigate the effects of vibrating the forearm bone in the free limb on muscle strength and bone mineral density of the forearm in patients with forearm/elbow fracture.
A total of 80 patients with forearm/elbow fracture are planned to include in this study. Patients will be randomly attained Training or Control group. Training period will be six weeks. Patients in the control group will receive standard care for provided for fractures, including fixation and rest.Before the start of the study and after six weeks, bilateral bone density of distal radius will be measured by DXA. Before trials, grip strength and the rest muscle electrical activity of contralateral wrist flexors and extensors will be measured. After six weeks, bilateral grip strength and the rest muscle electrical activity will be measured.
Study Overview
Detailed Description
The structure of a bone and the muscles surrounding it changes in a temporally synchronized fashion. Skeletal muscles have positive effects on bone structure and function. It is well-known that exercise training of muscles improves the resistance of bone to mechanical loading and that physical activity is also important for treating and preventing osteoporosis. Resistance and impact training can induce bone formation and/or prevent bone resorption. Immobilization frequently leads disuse osteoporosis in patients with a bone fracture.
Vibration has a strong osteogenic effect. The cyclic mechanical loading to the bone stimulates osteocytes. Vibration-induced bone formation is neuronally regulated. Vibration can also effectively enhance muscle strength and power. Previous studies have shown that vibration increases muscle electromyographic (EMG) activity. Based on the bone myoregulation reflex, bone is sensitive to mechanical stimuli and can send mechanical input signals to central nervous system and so can neuronally regulate the muscle activity.
Previous studies have documented the impact of unilateral training of limb muscle on the untrained contralateral homologous muscle.
The aim of the present study is to investigate the effects of vibrating the forearm bone in the free limb on muscle strength and bone mineral density of the forearm in patients with forearm/elbow fracture.
The study will include a total of 80 patients with forearm/elbow fractures. The participants meeting inclusion criteria will be randomized into one of two groups: a training group (40 cases) and a control group (40 cases). Patients in the control group will receive standard care for provided for fractures, including fixation and rest.
Forearm Vibration: Training group will exercise 5 times a week for six week period using a forearm vibration device. The forearm vibration device consists of a joystick unit, a weight-pulley system and a control panel. The subject will be seated in a chair. The right forearm will be placed on the vibration device with the shoulder in 10 degrees abduction, the elbow in 90 degrees flexion and the forearm and wrist in the neutral position. The axis of rotation of joystick unit will be aligned with that of the wrist joint of the free arm. The joystick unit will be capable of performing both an angular and a sliding motion simultaneously. The angular motion obtained the vibration effect and the sliding motion obtained the compression effect. The angular motion of the joystick unit will be provided by an electric motor. The range of angular motion will be 6 degrees. The weight is attached to the joystick with a rope and pulley system to provide mechanical loading to the forearm (compression effect). This weight is defined as vibration load. Maximum vibration load tolerated will be applied during vibration. The amplitude of vibration (range of motion of the wrist) will be 6 degree and the frequency of the vibration will be 40 Hz. The exercise duration and intensity will be low at the beginning but increased systematically over the 6-week training period. The subjects will be asked to report negative side effects or adverse reactions in their training diary.
Bone Densitometry: Before trails and after six weeks, bilateral bone density of distal radius will be measured by DXA. The bilateral bone density will be evaluated by bone densitometer (Norland).
Grip Strength Measurement: Before the start of the study, grip strength of wrist muscles in the free limb will be measured. After six weeks, bilateral grip strength will be measured by a hand dynamometer (Jamar digital plus hand dynamometer).
Surface EMG: Surface EMG of the right and left wrist muscles will be recorded using disposable self-adhesive bipolar Ag/AgCl electrodes (Kendall Arbo ) placed on its belly. The small disc electrodes (10-mm in diameter, inter-electrode distance of 20 mm) arranged in the direction of the muscle fibers. All cables will be carefully taped to the skin.
The skin overlying the muscle will be shaved, light abrasion will be applied, the skin will be cleaned using 70% alcohol and, conductive paste will be used to reduce electrode resistance before placing the electrodes.
Motor unit potentials will be amplified and recorded on a computer for off-line analyses at a sampling frequency of 2k using a data acquisition and analysis system (Powerlab data acquisition system, ADInstruments, Australia).
Twenty seconds of myoelectrical activity will be recorded from wrist muscles at rest. The mean myoelectrical activity will be calculated as the root mean squared (RMS) using the EMG device software, and defined as the "resting myoelectrical activity". The resting myoelectrical activity will be expressed as microvolt.
Power spectral analyses will be done. They will be conducted using Hamming windowed, 2048 point epochs, resulting in a frequency resolution of 0.98 Hz.
This is a prospective, randomized, controlled, single blind trial
Study Type
Phase
- Not Applicable
Contacts and Locations
Study Locations
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-
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Istanbul, Turkey
- Bagcilar Training & Research Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Patients with a simple (uncomplicated) forearm/elbow fracture
- Males and females between 18 and 50 years of age
Exclusion Criteria:
- Fracture of distal radius
- Multiple previous fractures of bones in the upper extremities
- Complicated fracture (associated skin and/or tendon and/or nerve and/or vascular trauma, fragmented fractures )
- Patients not examined within the first three days after a trauma
Upper extremity problems
- Orthopedic problems: shortness of arms, congenital abnormalities
- Joint disease (arthritis, joint prosthesis, etc.)
- Other painful pathologies in the upper extremities (tendinitis, bursitis, etc.)
- Circulation problems in the upper extremities
- Skin lesions, dermatologic disorders
- Hypertension (>135 mmHg systolic, >85 mmHg diastolic) or Heart disease (coronary dis, conduction/rhythm prob, cardiac pacemaker)
- Neurological diseases (CNS problems, peripheral neuropathy)
- Systemic disease affecting bone metabolism: secondary osteoporosis, osteomalacia, Paget's disease, Diabetes mellitus, hepatic disease, renal dis. etc
- Non-cooperative patients, psychiatric conditions (panic attacks etc)
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Excercise
The forearm vibration training
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All cases will be trained by forearm vibration device 5 times a week for six weeks period.
Other Names:
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No Intervention: Control
Patients will be treated by routine fracture treatment methods (fixation and rest).
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change of forearm muscle strength
Time Frame: baseline and 6 weeks
|
Change of muscle strength with forearm vibration
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baseline and 6 weeks
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change of distal radius bone mineral density
Time Frame: baseline and 6 weeks
|
Change of distal radius bone mineral density with forearm vibration
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baseline and 6 weeks
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Collaborators and Investigators
Investigators
- Study Chair: ILHAN KARACAN, MD, Bagcilar Training & Research Hospital
Study record dates
Study Major Dates
Study Start
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- BEAH FTR-6
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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