- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04032041
SCANREP: Reliability of 3D Lower Limb Scanning
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Two groups of subjects will be recruited for this study. The first group (Group 1) will consist of healthy able-bodied individuals with no history of lower extremity trauma. The second group (Group 2) will consist of individuals with unilateral, below knee functional deficits that require an AFO (ankle foot orthosis) for daily activities (e.g. fracture, muscle and/or nerve injury, ankle arthritis, or peripheral neurologic disease).
The investigators will obtain a brief medical history to identify major medical conditions or prior injuries that could influence limb geometry, and lead to reliance on an AFO for Group 2 participants.
A 3D representation of each participant's lower limb geometry will be obtained using a Structure Core scanner (Occipital, Inc.) which uses an infrared structured light projector to construct a 3D image of an object. The scanner is connected to an iPad; to operate the user rotates the iPad camera around the desired object. In seconds, the entire geometry is digitally reconstructed. Measurements will be evaluated using digital imaging analysis software (Standard Cyborg, Inc.). The investigators will evaluate concurrent validity by directly comparing software-based measurements from limb scans, with direct measurements on the same individual collected using digital calipers. The investigators will determine repeatability of each technique by conducting three identical limb scans and actual physical measurements at two time points on the same day in each individual, and then comparing the results between time points. The interior of the AFO worn by participants in Group 2 will also be scanned to obtain its geometry for comparison with measurements obtained from each individual's limb.
Validity and repeatability will be assessed using measurements at multiple locations on the lower leg. Limb measurements will include 1) width of the metatarsal heads, 2) width of the calcaneus, 3) foot length, 4) foot height, 5) arch height, 6) medial-lateral width between ankle malleoli, 7) minimum circumference above the ankle malleoli, 8) maximum calf circumference , 9) medial-lateral width of the knee condyles 10) anterior-posterior width at mid patellar tendon, 11) distance from bottom of foot to tibial tubercle.
Concurrent validity will be determined using the intra-class correlation coefficient and absolute error (root mean square error) for comparisons between measurements from limb scanning and the calipers. Reliability will be determined using the intra-class correlation coefficient and the minimal detectable change value for comparisons over time.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
-
-
Iowa
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Iowa City, Iowa, United States, 52242
- University of Iowa
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
GROUP 1 (Completed)
Patient Inclusion criteria
- Ages: 18-75
- Healthy individuals without a current complaint of lower extremity pain, spine pain, active infections or medical or neuromusculoskeletal disorders that have limited participation in work or exercise in the last 6 months
- Ability to perform a full squat without pain
- Able to read and write in English and provide written informed consent
Patient Exclusion criteria
- Diagnosed moderate or severe brain injury
- Diagnosis of a physical or psychological condition that would preclude testing (e.g. cardiac condition, clotting disorder, pulmonary condition)
- Current complaint of pain or numbness in the spine
- Uncorrected visual or hearing impairments that limit the ability to understand or comply with instructions given during testing
- Require an assistive device
- Open/unhealed wounds on lower extremity.
- BMI greater than 35
GROUP 2 (Recruiting)
Patient Inclusion criteria
- Ages: 18-75
- Daily AFO use to address unilateral below knee functional deficits (e.g. fracture, muscle and/or nerve injury, ankle arthritis, or peripheral neurologic disease)
- Ability to stand independently without use of an assistive device (Cane, crutch, etc)
- Ability to safely bear full body weight on affected limb without use of an AFO or other protection
- Able to read and write in English and provide written informed consent
Patient Exclusion criteria
- Use of an AFO that crosses the knee (includes Knee brace or similar)
- Open/unhealed wounds on lower extremity
- Uncorrected visual or hearing impairments that limit the ability to understand or comply with instructions given during testing
- BMI greater than 35
- Diagnoses of a moderate to severe brain injury
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Group 1: Healthy Able-bodied Individuals (Completed)
Healthy able-bodied individuals with no history of lower extremity trauma.
|
A 3D representation of each participant's lower limb geometry will be obtained using a Structure Core scanner (Occipital, Inc.) which uses an infrared structured light projector to construct a 3D image of an object.
The scanner is connected to an iPad; to operate the user rotates the iPad camera around the desired object.
In seconds, the entire geometry is digitally reconstructed.
|
Group 2: Individuals Requiring AFO Use (Recruiting)
Individuals with unilateral, below knee functional deficits that require an AFO for daily activities (e.g.
fracture, muscle and/or nerve injury, ankle arthritis, or peripheral neurologic disease).
|
A 3D representation of each participant's lower limb geometry will be obtained using a Structure Core scanner (Occipital, Inc.) which uses an infrared structured light projector to construct a 3D image of an object.
The scanner is connected to an iPad; to operate the user rotates the iPad camera around the desired object.
In seconds, the entire geometry is digitally reconstructed.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Width of the metatarsal heads
Time Frame: Less than 2 days
|
Distance from the medial aspect of the first metatarsal head to the lateral aspect of the fifth metatarsal head.
|
Less than 2 days
|
Width of the calcaneus
Time Frame: Less than 2 days
|
Distance from the medial aspect of calcaneus parallel to lateral aspect of calcaneus.
|
Less than 2 days
|
Foot length
Time Frame: Less than 2 days
|
Distance from the most posterior aspect of calcaneus to the most anterior toe (1st or 2nd).
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Less than 2 days
|
Foot height
Time Frame: Less than 2 days
|
Distance from the most superior point on the foot distal to the tibialis anterior insertion.
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Less than 2 days
|
Arch height
Time Frame: Less than 2 days
|
Dorsum height at 50% foot length.
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Less than 2 days
|
Medial-lateral ankle malleoli width
Time Frame: Less than 2 days
|
Distance from the lateral malleolus to the medial malleolus.
|
Less than 2 days
|
Minimum ankle circumference
Time Frame: Less than 2 days
|
Minimum ankle circumference above the ankle malleoli.
Must be less than 10 cm proximal to the ankle malleoli.
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Less than 2 days
|
Maximum calf circumference
Time Frame: Less than 2 days
|
Maximum calf circumference greater that 5 cm distal to the knee condyles.
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Less than 2 days
|
Width of the knee condyles
Time Frame: Less than 2 days
|
Distance from the medial condyle to the lateral condyle.
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Less than 2 days
|
Anterior-posterior width at patella
Time Frame: Less than 2 days
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Distance from mid patellar tendon to a parallel point most posterior on the back of the knee.
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Less than 2 days
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Tibial tubercle height
Time Frame: Less than 2 days
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Distance from the floor to tibial tubercle.
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Less than 2 days
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ACTUAL)
Study Completion (ANTICIPATED)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 201905871
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
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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