Electrical Currents on Hypoalgesia

Study Overview
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Brief Summary
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The objective of this study is to compare the hypoalgesic effects of TENS, Interferential current and Aussie current in pressure pain threshold and sensory discomfort in healthy subjects.

Official Title
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Hypoalgesic Effect of Low Frequency and Burst Modulated Alternating Currents on Healthy Individuals.

Conditions
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Healthy

Intervention / Treatment
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* Device: Interferential current
* Device: Aussie Current
* Device: TENS


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: health adults Exclusion Criteria: injury to nerves of the upper limbs, pain, pregnancy, chronic diseases, cardiac pacemaker, epilepsy, allergy to the electrode used, use of pain medication, skin lesions or lack of sensitivity in the areas of electrode placement

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Control group<br>This group will not receive electrical stimulation. Volunteers will rest during 30 minutes. | |
| Active Comparator: Interferential current group<br>Interferential current will be applied during 30 minutes to volunteer's forearm. Intensity will be increase until volunteers fell a strong but comfortable paresthesia. | Device: Interferential current<br>* Interferential current will be applied during 30 minutes to volunteer's forearm at a strong but comfortable intensity. Carrier frequency will be set at 4 kilohertz (kHz) and modulated frequency will be set at 100 Hz.<br>|
| Active Comparator: TENS Group<br>TENS will be applied during 30 minutes to volunteer's forearm. Intensity will be increase until volunteers fell a strong but comfortable paresthesia. | Device: TENS<br>* TENS will be applied during 30 minutes to volunteer's forearm at a strong but comfortable intensity. Pulse duration will be set at 125 microseconds and frequency will be set at 100 Hz.<br>|
| Active Comparator: Aussie current group<br>Aussie current will be applied during 30 minutes to volunteer's forearm. Intensity will be increase until volunteers fell a strong but comfortable paresthesia. | Device: Aussie Current<br>* Aussie current will be applied during 30 minutes to volunteer's forearm at a strong but comfortable intensity. Carrier frequency will be set at 4 kHz and modulated frequency will be set at 100 Hz.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pressure Pain Threshold | Pressure Pain Threshold will be measured using a digital pressure algometer SOMEDIC type II. The applied force will be measured in Newton (N). | Baseline, 15 minutes after the beginning of electrical stimulation, 30 minutes after the beginning of electrical stimulation, and 20 minutes after electrical stimulation. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Sensory Discomfort | Sensory Discomfort will be measured using a 10 cm visual analogue scale (VAS). The degree of discomfort will be measured in centimeters (cm). | 15 and 30 minutes after the beginning of electrical stimulation. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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volunteers, 18 to 65 years, Males and Females