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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT04314960
Other study ID # AU-HEA-SS-20200308a
Secondary ID
Status Recruiting
Phase N/A
First received
Last updated
Start date June 23, 2020
Est. completion date June 2022

Study information

Verified date September 2020
Source Ariel University
Contact Uri Gottlieb, MSc
Phone +972542022767
Email urigott@gmail.com
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Individuals with chronic ankle instability (CAI) display neuromuscular deficits such as altered control of posture and gait when compared with healthy controls. These deficits may be attributed to muscle inhibition occurring after a surrounding joint structure has been damaged. Functional electrical stimulation (FES) is the application of high-intensity intermittent electrical stimuli to generate muscle contractions that may overcome inhibition, and which is coupled with a functional task such as gait.

The current study aims to investigate the short and immediate effects of FES on gait parameters and postural control in subjects with CAI. Prior to intervention, treadmill gait will be evaluated using a motion analysis system, and postural control will be evaluated in a series of tests that measure balance, reaction time to ankle perturbation and stabilization ability after jump-landing. Then, a 20 minutes gait training with an FES device will be applied. Immediate effects of the training on gait parameters will be assessed. For medium-term effects evaluation, subjects will return for additional 7 training sessions (2 per week for 4 weeks), following by a complete measurements acquisition as prior to intervention. At six months follow-up, subjects will be contacted for collecting subjective outcomes.


Recruitment information / eligibility

Status Recruiting
Enrollment 22
Est. completion date June 2022
Est. primary completion date June 2022
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years to 45 Years
Eligibility Inclusion Criteria:

1. A history of at least one significant ankle sprain:

1. At least 12 months prior to participating in the study

2. Was characterized by inflammatory symptoms (i.e. pain and swelling)

3. Caused at least one day of decreased physical activity

2. At least 3 months since the last acute ankle sprain that results in inflammatory symptoms and at least one interrupted day of desired physical activity.

3. History of the previously injured ankle 'giving way' at least twice during the last 6 months, and/or 'feelings of instability' and/or recurrent sprain.

4. Being able to bear full weight on the injured lower extremity with no more than mild discomfort.

5. Scoring<24 in the Cumberland Ankle Instability Tool (CAIT)

Exclusion Criteria:

1. A history of previous surgeries to a musculoskeletal structure in either lower limb.

2. A history of a fracture requiring re-alignment

3. Any acute injury to a lower limb in the last 3 months.

Study Design


Intervention

Device:
Functional electrical stimulation device (NESS L300Plus, Bioness, Valencia, CA)
Functional electrical stimulation (FES) is the application of high-intensity intermittent electrical stimuli to generate muscle contractions that may bypass spinal and supraspinal inhibition, and which is coupled with a functional task such as gait. Gait training will be conducted on a treadmill.

Locations

Country Name City State
Israel Ariel University Ariel

Sponsors (1)

Lead Sponsor Collaborator
Shmuel Springer

Country where clinical trial is conducted

Israel, 

Outcome

Type Measure Description Time frame Safety issue
Other Foot and Ankle Ability Measure (FAAM) - questionnaire A self-reported functional outcome measure utilized to track subjective changes in perceived pain and ankle function
Score ranges between 0-100. Higher scores represent higher levels of function, with score of 100 represents no disability.
through intervention completion, approximately at 4 weeks
Other Cumberland Ankle Instability Tool (CAIT) - questionnaire A self-reported outcome measure designated for people with chronic ankle instability. Will also serve as an inclusion criteria.
Score ranges between 0-30, with lower scores indicate less ankle instability.
through intervention completion, approximately at 4 weeks
Primary Immediate change in ankle inversion angle during heel strike Ankle inversion angle at heel strike (in degrees) will be measured using Qualisys motion analysis system.
Change will be measured between pre-intervention to immediately after first intervention session to assess immediate effects of the intervention.
immediately after the intervention
Primary Change in ankle inversion angle during heel strike at 4 weeks Ankle inversion angle at heel strike (in degrees) will be measured using Qualisys motion analysis system.
Change will be measured between pre-intervention and after completing the entire intervention.
through intervention completion, approximately at 4 weeks
Primary Immediate change in peroneal muscle electromyography Peroneal muscle activity will be measured (in millivolts) using Trigno EMG system during the 5% of gait cycle prior to heel strike.
Change will be measured between pre-intervention to immediately after first intervention session to assess immediate effects of the intervention.
immediately after the intervention
Primary Change in peroneal muscle electromyography at 4 weeks Peroneal muscle activity will be measured (in millivolts) using Trigno EMG system during the 5% of gait cycle prior to heel strike.
Change will be measured between pre-intervention and after completing the entire intervention.
through intervention completion, approximately at 4 weeks
Secondary Change in Star excursion balance test (SEBT) score The SEBT has been previously described as a postural control test that can differ between subjects with CAI and healthy controls. The test is performed with the subjects standing barefoot in the middle of a grid formed by eight tape measures extending out at 45° from each other. While the subject is balancing on one leg that is placed in the middle of the grid, the other leg has to reach as far as possible in each direction. The reached distance in centimeters is recorded, with the greater distance representing better postural stability. An average scores is calculated and normalized to the length of the subject's leg in centimeters. through intervention completion, approximately at 4 weeks
Secondary Time to stabilization (TTS) TTS is the time required to normalize ground reaction forces (GRF) after following a jump-landing. To measure TTS, subjects will be required to perform a single-leg drop-jump from a 40-cm box onto a force plate (Kistler, Switzerland) and keep balancing on a single leg for 20 seconds. GRF recordings will be analyzed to determine TTS in seconds in the ML and AP planes, as was previously described. Shorter duration demonstrates better postural stability. Subjects will be allowed at least 3 practice trials, following by 5 successful jumps landings. A rest period of 30 seconds will be allowed between jumps. If a subject will not be able to stabilize for at least 20 seconds, the trial will be repeated.
Lower values indicate better postural control.
through intervention completion, approximately at 4 weeks
Secondary Peroneal reaction time (PRT) PRT is the time duration between and ankle inversion perturbation and beginning of peroneal muscle activation which is recognized using EMG. Subjects will stand on an inversion stimulator. In an unknown time, a sudden inversion perturbation will occur. Time measurement between perturbation time and muscle activation time is measured in seconds.
Lower values indicate better postural control.
through intervention completion, approximately at 4 weeks
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