Dynamic Corrective Force Device: A Balance Measure for Amputees

Principal Investigator(s):  View help for Principal Investigator(s) Jennifer Johansson, Liberating Technologies, Inc.; Craig Kelly, Liberating Technologies, Inc.; Carlton King, Liberating Technologies, Inc.; Brianna Rozell, Liberating Technologies, Inc.; Conor Messer, Liberating Technologies, Inc.; Rudolf Buijs, Liberating Technologies, Inc.; Michael Delph, Liberating Technologies, Inc.; Susan D'Andrea, Providence VA Medical Center; Jason Wheeler, Sandia National Laboratories

Version:  View help for Version V1

Name File Type Size Last Modified
  Force-Plate-Data--Force-and-COP-.txt 05/14/2020 01:22:PM
  IMU-Data--Quaternions-.csv 05/14/2020 02:08:PM
  Instrumented-Insole-Data--Force-and-COP-.csv 05/14/2020 01:28:PM
  Motion-Capture-Data--Lab-Coordinates-.tsv 05/14/2020 01:32:PM
  Motion-Capture-Kinematics-Data--Relative-Angles-.txt 05/14/2020 01:35:PM
Metadata.xlsx application/vnd.openxmlformats-officedocument.spreadsheetml.sheet 12.3 KB 05/18/2020 06:57:AM

Project Citation: 

Johansson, Jennifer, Kelly, Craig, King, Carlton, Rozell, Brianna, Messer, Conor, Buijs, Rudolf, … Wheeler, Jason. Dynamic Corrective Force Device: A Balance Measure for Amputees. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2020-05-18. https://doi.org/10.3886/E119449V1

Project Description

Summary:  View help for Summary The loss of balance is a significant problem for those who have undergone lower-limb amputations. Studies have shown that 52.4% of lower-extremity amputees have reported falling in the previous year, and 66% of above-knee amputees report falling annually, which is twice the rate of able-bodied adults over the age of 65. Given this, it’s important to select the most appropriate components for each prosthetic device to maximize function while optimizing balance and stability to ultimately reduce the patient’s risk of falls. Therefore, we are developing a tool to provide quantitative measures of balance to the clinician to aid in the selection of prosthetic feet and other components to optimize a patient’s stability and functional needs.
Funding Sources:  View help for Funding Sources Congressionally Directed Medical Research Programs (CDMRP) (W81XWH-15-1-0542)

Scope of Project

Subject Terms:  View help for Subject Terms Balance; Amputee; Limb Difference; Limb Absence; IMU; Insoles; Center of Pressure; Center of Gravity; Gait; Dynamic Balance; Prosthetic Foot; Xsens; Motion Capture; Level Walking
Geographic Coverage:  View help for Geographic Coverage Northeastern United States
Time Period(s):  View help for Time Period(s) 2018 – 2019
Collection Date(s):  View help for Collection Date(s) 2018 – 2019
Universe:  View help for Universe Adults with a below-knee limb absence who use a prosthetic leg.
Data Type(s):  View help for Data Type(s) clinical data
Collection Notes:  View help for Collection Notes Motion data was collected on prosthetic leg users with a below-knee limb difference during level walking at a self selected walking speed. Data was collected to build a model with inertial measurement unit (IMU) sensors and pressure sensing insoles. This model was developed to create a tool to provide quantitative measures of balance to the clinician to aid in the selection of prosthetic feet and other components to optimize a patient’s stability and functional needs.

One set of subjects (PVA) had data collected in the PVA Gait and Motion and Analysis Laboratory with a Qualysis Motion Capture System and 2 force plates alongside 16 Xsens IMU's and custom pressure sensing insoles developed by Sandia National Laboratories.

Another set of subjects (LTI) had data collected with just 12 Xsens IMU's and custom pressure sensing insoles developed by Sandia National Laboratories.

This work was supported by the Office of the Assistant Secretary of Defense for Health Affairs under award number W81XWH-15-1-0542 through the Orthotics and Prosthetics Outcomes Research Program. Opinions, interpretations, conclusions and recommendations are those of the author and are not necessarily endorsed by the Department of Defense.

Methodology

Sampling:  View help for Sampling The order of prosthetic feet (Celsus or Horizon) walked on was randomized for every subject.
Collection Mode(s):  View help for Collection Mode(s) other
Unit(s) of Observation:  View help for Unit(s) of Observation Individual

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V1 [2020-05-18]

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