The purpose of this study is to determine whether the transcutaneous application of unmodulated high frequency alternating currents could produce a quickly conduction block of peripheral nerve.
In the last years several animal experimental studies have evidenced that high frequency unmodulated currents about 5 KHz can cause a peripheral nerve block. However electric currents with these high frequencies that are usually used for the treatment of pain in humans are interrupted or modulated (i.e. interferential currents). It has show that the diameter of the nerve it is related with the frequency to produce the conduction block. For this reason we decided to applied 30KHz to observe the effects on pain in patients with whiplash and to compare versus sham stimulation. Only one study has applied 5KHz on experimental pain and they have demonstrated changes in somatosensory thresholds.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
14
high-Frequency electrical stimulation over superficial radial nerve through the electrotherapy device Myomed 932. (Enraf-Nonius, Delft, Netherlands)
Sham transcutaneous electrical stimulation over superficial radial nerve through the electrotherapy device Myomed 932. (Enraf-Nonius, Delft, Netherlands)
Diego Serrano-Muñoz
Toledo, Spain
Baseline Mechanical Pain Threshold
The pressure pain threshold will be measured by a pressure algometer and will be expressed in Newton
Time frame: baseline at 0 min
Baseline Tactile Threshold
The tactile threshold will be measured with Von Frey filaments and will be expressed in millinewton
Time frame: baseline at 0 min
Baseline Muscle Strength
The muscle strength will be measured with a dynamometer and will be expressed in Newton
Time frame: Baseline at 0 min
Mechanical Pain Threshold after treatment at 30 min
The pressure pain threshold will be measured by a pressure algometer and will be expressed in Newton
Time frame: Immediately after treatment at 30 min
Tactile Threshold after treatment at 30 min
The tactile threshold will be measured with Von Frey filaments and will be expressed in millinewton
Time frame: Immediately after treatment at 30 min
Muscle Strength after treatment at 30 min
The muscle strength will be measured with a dynamometer and will be expressed in Newton
Time frame: Immediately after treatment at 30 min
Change from baseline in Mechanical Pain Threshold
The pressure pain threshold will be measured by a pressure algometer and will be expressed in Newton
Time frame: baseline at 0 min, immediately after treatment at 30 min
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Change from baseline in TactileThreshold
The tactile threshold will be measured with Von Frey filaments and will be expressed in millinewton
Time frame: baseline at 0 min, immediately after treatment at 30 min
Change from baseline in Muscle strength
The muscle strength will be measured with a dynamometer and will be expressed in Newton
Time frame: baseline at 0 min, immediately after treatment at 30 min