The Postural Control in Individuals With the Structural Leg-length Discrepancy

February 8, 2017 updated by: Małgorzata Eliks, Poznan University of Medical Sciences

Does the Structural Leg-length Discrepancy Affect the Postural Control? Preliminary Study

The structural leg-length inequality caused by the shortening of a segment of an extremity, results in an altered position of lower limb joints, the pelvis and the spine in static as well as dynamic conditions. That may induce a disturbance of the postural control.

The objective of this study is to investigate the effect of the structural LLD on the control of the posture.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The measurement of the weight distribution and the static posturography is performed on the balance platform Good Balance by Metitur . The device is comprised of the triangular force platform (800 mm x 800 mm x 800 mm) with electronic system and computer software. The body weight distribution is evaluated in the upright standing with eyes open, feet placed 20 cm from each other or narrower in children, with upper extremities in relaxed position by sides. The individual stands motionlessly for 15 s, then the measurement is recorded. The results of each lower extremity loading and a difference in weight bearing between extremities are expressed in percentages (%) .

The static posturography examination is performed with 3 various positions of feet, both with eyes open (EO) and eyes closed (EC). (1) Position : normal standing - an upright standing with feet placed parallel 20 cm apart. (2) Position: tandem - a stance with one foot placed ahead of the other, medial edge of feet was put on the midline of the balance platform. In the experimental group 2 trials were recorded: (a) foot of the shorter leg in the front, (b) foot of the shorter leg in the rear. In the control group also 2 trials are performed: (c) foot of the right leg in the front, (d) foot of the left leg in the front. (3) Position: one leg standing: stance on the one leg, foot placed 10 cm from midline of the platform, the other - 90 degrees flexion of the knee and the hip, test performed only with EO. Every participant is supposed to stand motionlessly for 30 s in normal standing , or for 20 s in tandem .and one leg standing position. Conditions of the posturographic examination involved : quiet and normally lit room , standing barefoot , the eyesight directed at a point in the distance of 2 m , glasses or contact lenses are worn if they are normally needed, arms held in the front of the body with hands together in order to limit movements of upper extremities . The recording is initiated when a stable position is attained . Each test is performed once .

Mean velocity (mm/s) of COP sway is measured as a quantitative parameter of the postural control assessment . Mean COP sway velocity is recorded both in anteroposterior (AP) and mediolateral (ML) directions .

Study Type

Interventional

Enrollment (Actual)

38

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Poland
      • Poznań, Poland, 61-701
        • Poznan University of Medical Sciences

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

6 years to 30 years (ADULT, CHILD)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • for patients: structural leg length discrepancy
  • for healthy volunteers: symmetrical length of lower limbs

Exclusion Criteria:

  • for patients: achondroplasia, non-union, idiopathic scoliosis, extremity shortening in the course of neurological disease (e.g. Cerebral Palsy), vestibular disorder (e.g. Ménière's disease), diabetes, sensory disorder, intake of medications affecting psychomotor activity, dizziness, neurological diseases (e.g. epilepsy), BMI>30, using mobility aids (e.g. crutches)
  • for healthy volunteers: leg-length discrepancy, scoliosis, faulty posture, vestibular disorders, diabetes, intake of medications affecting psychomotor activity, dizziness, sensory disorders, neurological disease, BMI>30.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: DIAGNOSTIC
  • Allocation: NON_RANDOMIZED
  • Interventional Model: PARALLEL
  • Masking: SINGLE

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
EXPERIMENTAL: Individuals with leg-length discrepancy
Patients of Department of Paediatric Orthopaedics and Traumatology, Poznan University of Medical Sciences diagnosed with leg-length discrepancy. The examination of participants included a measurement of the length of lower limbs and the weight distribution as well as performing the static posturography.
Other: static posturography
The measurement of the weight distribution and the static posturography was performed on the balance platform Good Balance by Metitur . The device is comprised of the triangular force platform with electronic system and computer software. The body weight distribution was evaluated in the upright standing with eyes open, feet placed 20 cm from each other.The individual stood motionlessly for 15 s, then the measurement was recorded. The static posturography was performed with 3 various positions of feet, both with eyes open and eyes closed. (1) Position : normal standing - an upright standing with feet placed parallel 20 cm apart for 30 s. (2) Position: tandem - a stance with one foot placed ahead of the other. for 20 s. (3) Position: one leg standing: stance on the one leg for 20 s.
ACTIVE_COMPARATOR: control group
The group with healthy individuals; without leg-length discrepancy. The examination of participants included a measurement of the weight distribution as well as performing the static posturography.
Other: static posturography
The measurement of the weight distribution and the static posturography was performed on the balance platform Good Balance by Metitur . The device is comprised of the triangular force platform with electronic system and computer software. The body weight distribution was evaluated in the upright standing with eyes open, feet placed 20 cm from each other.The individual stood motionlessly for 15 s, then the measurement was recorded. The static posturography was performed with 3 various positions of feet, both with eyes open and eyes closed. (1) Position : normal standing - an upright standing with feet placed parallel 20 cm apart for 30 s. (2) Position: tandem - a stance with one foot placed ahead of the other. for 20 s. (3) Position: one leg standing: stance on the one leg for 20 s.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Evaluation of mean COP velocity in anteroposterior and mediolateral directions during stance in subjects
Time Frame: 1.02.2017
Mean COP velocity [mm/s] is recorded in anteroposterior (AP) and mediolateral (ML) directions within posturographic evaluation in examination of every participant.
1.02.2017

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Evaluation of weight distribution during stance in subjects
Time Frame: 1.02.2017
The weight loading of each limb is assessed in every participants. The result is expressed in kilograms [kg].
1.02.2017

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Poznan University of Medical Sciences

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (ACTUAL)

January 18, 2017

Primary Completion (ACTUAL)

January 25, 2017

Study Completion (ACTUAL)

February 1, 2017

Study Registration Dates

First Submitted

February 6, 2017

First Submitted That Met QC Criteria

February 7, 2017

First Posted (ESTIMATE)

February 9, 2017

Study Record Updates

Last Update Posted (ACTUAL)

February 10, 2017

Last Update Submitted That Met QC Criteria

February 8, 2017

Last Verified

February 1, 2017

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 418/14

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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