Electrical Stimulation to Recover Greater Range of Motion After Surgery

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

Total Enrollment

25 participants

Study Classification

OBSERVATIONAL

Study Start Date

2008-04-30

Study Completion Date

2009-08-31

Brief Summary

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Background

One of the potentially debilitative complications of operative repair and subsequent immobilization is stiffness that appears secondary to inflammation and adhesions. To prevent such a physical impairment, active joint mobilization has shown to be efficient. However, adhesions sometimes remain despite the therapy. Due to the viscoelastic nature of the biological tissues, if a technique can enable to extend the muscle ability to impose a maximal steady stress on adhesions, adhesion deformation should be greater and range of motion deficit should be reduced. Within that context, the purpose of the present study was to assess the real-time effects of superimposed electrical stimulation (SES) on maximal voluntary muscular contraction (VOL) over time and to assess SES effects on range of motion recovery in thumb stiff joint.

Methods and Findings

The aim of the first experiment was to examine the real-time effects of tetanic SES on the maximal volitional level of force over repeated contractions of the triceps brachii muscle. To address this goal, seventeen subjects participated voluntarily in this study. Two features of the muscular force were assessed: The peak force (1) and the impulse (2). These two dependent variables were measured during 500 sec - including 50 maximal force productions of 4 sec each- in two randomized conditions of VOL and SES. When considering the 50 trials as a whole, exerted force was higher in the SES than in the VOL condition for both peak force and impulse (P\<.05). Over time, peak force and impulse decreased consistently in VOL starting between the 20th and 30th trials whereas they were maintained in SES condition (P\<.05).

The aim of the second experiment was to compare the effects of VOL and SES on the range of flexion recovery of the stiff metacarpophalangeal joint following operative repair of the ulnar collateral ligament of the thumb. To address this goal, eight patients participated voluntarily. Range of motion, oedema and pain were assessed before and after the two randomised conditions of VOL and SES.

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Detailed Description

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Conditions

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Thumb Joint Stiffness

Study Design

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Observational Model Type

CASE_ONLY

Study Time Perspective

CROSS_SECTIONAL

Interventions

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electrically induced muscle activation

30 Hz frequency, 200 µs pulse duration, and 40% duty cycle (4 sec on, 6 sec off)

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* loss of range of flexion in the involved metacarpophalangeal joint of at least ten degrees when compared to the opposite thumb
* more than eight weeks post-surgery

Minimum Eligible Age

20 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes