Action Mechanisms of Shock Waves on Pain

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

63 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-05-07

Study Completion Date

2018-05-22

Brief Summary

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The aim of this study is to evaluate whether the intensity of pain perceived during the application of extracorporeal shockwave therapy (ESWT) is determinant for producing changes in pressure pain threshold (PPT) in asymptomatic subjects. The investigators will perform a single controlled random trial to three groups. Two of them will receive ESWT whereas the third group will get a cold pressure test (CPT).

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Detailed Description

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Conditions

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Asymptomatic Condition

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

DOUBLE

Investigators Outcome Assessors

Study Groups

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Shockwave Light Pain Group

Sham Comparator. It will received a light intensity shockwave in the lateral epicondyle regulated until reach a 3/10 in the Visual Analog Scale (VAS) scale.

Group Type EXPERIMENTAL

Sham Comparator

Intervention Type OTHER

The investigators will apply a light intensity shockwave in the lateral epicondyle with the portable SHOCKMASTER 300 at a 8Hz frequency and 2000 impulses. The intensity will be regulated to reach a 3/10 in the VAS scale, depending on the tolerance of the subject. Each patient will receive between 5 and 10 impulses starting with the lower intensity of the device (middle energy: 1 bar) and will go up towards the target (3/10 in VAS).

Shockwave Moderate Pain Group

Experimental Intervention. It will received a moderate intensity shockwave in the lateral epicondyle regulated until reach a 6/10 in the Visual Analog Scale (VAS) scale.

Group Type EXPERIMENTAL

Experimental Intervention

Intervention Type OTHER

The investigators will apply a moderate intensity shockwave in the lateral epicondyle with the portable SHOCKMASTER 300 at a 8Hz frequency and 2000 impulses. The intensity will be regulated to reach a 6/10 in the VAS scale, depending on the tolerance of the subject. Each patient will receive between 5 and 10 impulses starting with the lower intensity of the device (middle energy: 1 bar) and will go up towards the target (6/10 in VAS).

Cold Pressure Group

Control Group. The cold pressure test will be apply to this group. The investigators will use a container with an outer part filled with ice and an inner part filled with water, both separated by a screen that prevents direct contact between the ice and the hand. The water will be regularly stirred to maintain the temperature near to 0.7ºC.

Group Type OTHER

Control Group

Intervention Type OTHER

Patients will place their hand, wide open and up to the wrist, into the inner part of the container and will keep it under water for a maximum time of 2 minutes. If pain is unbearable before the time ends, the participant will be able to withdraw the hand.

Interventions

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Sham Comparator

The investigators will apply a light intensity shockwave in the lateral epicondyle with the portable SHOCKMASTER 300 at a 8Hz frequency and 2000 impulses. The intensity will be regulated to reach a 3/10 in the VAS scale, depending on the tolerance of the subject. Each patient will receive between 5 and 10 impulses starting with the lower intensity of the device (middle energy: 1 bar) and will go up towards the target (3/10 in VAS).

Intervention Type OTHER

Experimental Intervention

The investigators will apply a moderate intensity shockwave in the lateral epicondyle with the portable SHOCKMASTER 300 at a 8Hz frequency and 2000 impulses. The intensity will be regulated to reach a 6/10 in the VAS scale, depending on the tolerance of the subject. Each patient will receive between 5 and 10 impulses starting with the lower intensity of the device (middle energy: 1 bar) and will go up towards the target (6/10 in VAS).

Intervention Type OTHER

Control Group

Patients will place their hand, wide open and up to the wrist, into the inner part of the container and will keep it under water for a maximum time of 2 minutes. If pain is unbearable before the time ends, the participant will be able to withdraw the hand.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Absence of pain or illness
* No changes in cognitive ability
* Good command of Spanish, both spoken and written

Exclusion Criteria

* People with systemic diseases, tumors, infections, pacemakers, clotting disorders, skeletally immature, fibromyalgia, whiplash history, dizziness or in physiotherapeutic or pharmacological treatment
* Pregnant women

Minimum Eligible Age

18 Years

Maximum Eligible Age

40 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes