Article
Engineering, Biomedical
Clement J. Gurrey, Joseph L. Garbini, Samuel P. Bennett, Horace Y. Wang, Katheryn J. Allyn, Janna L. Friedly, Brian J. Hafner, Jake B. McLean, Brian G. Larsen, Joan E. Sanders
Summary: The research developed a system that allows lower-limb prosthesis users to quickly release and relock the socket while sitting, addressing the challenges of residual limb volume fluctuation. Users preferred a specific tether length during partial doffing, with the system being easy to operate and capable of releasing and relocking in a short time.
MEDICAL ENGINEERING & PHYSICS
(2021)
Article
Biotechnology & Applied Microbiology
Jason T. Maikos, John M. Chomack, J. Peter Loan, Kathryn M. Bradley, Susan E. D'Andrea
Summary: This study compared the motion of residual limb in individuals with transfemoral amputation using dynamic stereo x-ray technology under different socket types. The results showed no significant differences in femur kinematics between the two socket types, but the ischial containment socket demonstrated better performance in proximal-distal translation. There were no significant differences in comfort and utility between the two socket types.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Review
Rehabilitation
Molly Baumann, Ciera Price, Lauren Brousseau, Megan Loftsgaarden, Jordan Powell, Joan Sanders, W. Lee Childers
Summary: Residual limb health is crucial for prosthetic users, but many experience skin issues. The motion of the limb in the socket affects limb health. Studies suggest that elevated vacuum suspension systems improve residual limb health and reduce motion compared to other systems.
Article
Engineering, Biomedical
Daniel Ballesteros, Robert T. Youngblood, Andrew C. Vamos, Joseph L. Garbini, Katheryn J. Allyn, Brian J. Hafner, Brian G. Larsen, Marcia A. Ciol, Janna L. Friedly, Joan E. Sanders
Summary: The purpose of this research was to investigate the effects of an innovative cyclic panel-pull strategy on minimizing limb fluid volume loss in transtibial prosthesis users during ambulation. Results showed that adding panel-pull resulted in increased fluid volume for some participants, while uncoupling the liner from the panels and executing panel-pull led to decreased fluid volume for some participants. Panel-pull may be beneficial for retaining limb fluid volume in transtibial prosthesis users.
MEDICAL ENGINEERING & PHYSICS
(2022)
Article
Chemistry, Analytical
Ji-Hyeon Seo, Hyuk-Jin Lee, Dong-Wook Seo, Dong-Kyu Lee, Oh-Won Kwon, Moon-Kyu Kwak, Kang-Ho Lee
Summary: In this study, a prosthetic socket was developed to compensate for the volume change of the residual limb, using an inflatable air bladder to monitor and maintain pressure distribution. Through experiments, active volume compensation of the socket was successfully achieved during repetitive gait cycles, ensuring stable pressure within the residual limb.
Article
Engineering, Biomedical
Conor R. Lanahan, Kendrick A. Coburn, Brian J. Hafner, Daniel Ballesteros, Katheryn J. Allyn, Janna L. Friedly, Marcia A. Ciol, Ryan V. Carter, Joseph C. Mertens, Adam J. Krout, Joan E. Sanders
Summary: People with lower extremity amputation often face challenges in managing the fit of their prosthetic socket due to changes in fluid volume. This study found that intermittently doffing the prosthetic socket for as short as 4 minutes can help stabilize limb fluid volume. Further trials in real-life settings should be conducted.
CLINICAL BIOMECHANICS
(2023)
Review
Engineering, Biomedical
Francesca Gariboldi, Daniele Pasquarelli, Andrea Giovanni Cutti
Summary: A systematic review was conducted to collect information about available socket mechanical testing methods, aiming to support the definition of widely accepted guidelines. The study found that ISO 10328 could be a viable starting point for defining a testing guideline, but details such as clear definitions of anatomical landmarks and socket axes need to be agreed upon for a representative and repeatable test method.
MEDICAL ENGINEERING & PHYSICS
(2022)
Review
Engineering, Biomedical
Haoran Sun, Chaoming He, Ivan Vujaklija
Summary: This paper provides an overview of the latest trends and developments in the field of actuated lower-limb prostheses and corresponding technologies. It discusses various solutions for different levels of impairments and provides insights into the latest developments of sockets and suspension systems. The paper also explores the trends in surgical approaches aimed at improving prosthetic experience through enhanced physical and neural interfaces.
EXPERT REVIEW OF MEDICAL DEVICES
(2023)
Article
Rehabilitation
Tonya L. Rich, Greg Voss, Stuart Fairhurst, Mary Matsumoto, Steven Brielmaier, Karl Koester, Theoden Netoff, Andrew H. Hansen, John E. Ferguson
Summary: This study describes the design and testing of a novel sensor system for measuring distal end weight bearing in prosthetic sockets and alerting users of poor socket fit. The results show consistent relationships between the sensor measurements and socket fit, and users expressed interest in the device, highlighting its potential benefits during early prosthesis training.
DISABILITY AND REHABILITATION
(2023)
Article
Veterinary Sciences
Theresa M. Wendland, Bernard Seguin, Felix M. Duerr
Summary: This study investigated the mid-term clinical outcomes of partial limb amputation with a socket prosthesis (PLASP) in dogs. The results showed that PLASP allowed restoration of quadrupedal gait patterns in most patients, but a high complication rate was observed.
VETERINARY MEDICINE AND SCIENCE
(2023)
Review
Engineering, Biomedical
Minghui Wang, Qingjun Nong, Yunlong Liu, Hongliu Yu
Summary: This paper reviews the design and use of prosthetic sockets for lower limbs. It discusses the key factors affecting the use of prosthetic sockets, such as skin problems, interface stress, and volume fluctuations. Different types of lower limb prosthetic sockets are analyzed for their advantages and disadvantages, aiming to propose a design concept for prosthetic sockets with self-adaptation in real-time using smart materials with special mechanical properties.
EXPERT REVIEW OF MEDICAL DEVICES
(2022)
Article
Engineering, Biomedical
Kendrick A. Coburn, Nicholas S. DeGrasse, Katheryn J. Allyn, Brian G. Larsen, Joseph L. Garbini, Joan E. Sanders
Summary: This study describes a novel method to connect a prosthetic liner to an adjustable socket using magnets. The results show that magnetic panel pull can increase the socket volume during sitting, which is clinically relevant for stabilizing limb fluid volume in prosthesis users throughout the day.
MEDICAL ENGINEERING & PHYSICS
(2022)
Article
Orthopedics
Ashley D. Knight, Brad D. Hendershot, Todd J. Sleeman, Christopher L. Dearth, Felix Starker, Urs Schneider, Sara R. Koehler-McNicholas, Kyle Barrons, Eric Nickel, Spencer Mion, John Ferguson, Billie Savvas Slater, Gregory O. Voss, Karl Koester, Andrew H. Hansen
Summary: This study aims to improve the comfort and residual limb health of individuals with lower limb loss by implementing a passively ventilated liner-socket system. Through focus group meetings and an iterative design approach, a passively ventilated liner-socket system has been developed. The ex vivo design supports the feasibility of this system, but further development and human subject testing are required.
PROSTHETICS AND ORTHOTICS INTERNATIONAL
(2022)
Article
Engineering, Biomedical
Ethan J. Weathersby, Joseph L. Garbini, Brian G. Larsen, Jake B. McLean, Andrew C. Vamos, Joan E. Sanders
Summary: The study aims to develop, implement and test a control system for maintaining the fit of a prosthetic socket by continuously adjusting its size. Sockets with motor-driven adjustable panels were designed, and a proportional-integral control system was implemented to adjust socket size based on Socket Fit Metric data.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Kuie-Bin Chang, Parag Parashar, Li -Chien Shen, An-Rong Chen, Yan-Tsz Huang, Arnab Pal, Kee-Chin Lim, Po-Han Wei, Fu-Cheng Kao, Jin-Jia Hu, Zong-Hong Lin
Summary: This study proposes a self-powered triboelectric nanogenerator (TENG) based flexible tactile sensor array system for real-time monitoring of pressure distribution inside a prosthetic socket. The sensor is made of biocompatible PDMS polymer and PCL nanofiber membranes as triboelectric materials, providing high stability and low cost. Integration of the sensor array within a prosthetic device enables real-time monitoring of pressure distribution during gait simulation.
Article
Rehabilitation
Sara J. Morgan, Kendra S. Liljenquist, Andre Kajlich, Robert S. Gailey, Dagmar Amtmann, Brian J. Hafner
Summary: This study aimed to understand mobility in highly active lower limb prosthesis users in order to develop new items for the PLUS-M item bank. Through focus group discussions with participants from across the USA, three main themes were identified: mobility after amputation, mobility characteristics, and healthcare providers and systems. These findings will inform the development of high-activity items for the PLUS-M item bank.
DISABILITY AND REHABILITATION
(2022)
Article
Rehabilitation
Janis Kim, Cody L. McDonald, Brian J. Hafner, Andrew Sawers
Summary: The study aimed to explore the experiences of lower limb prosthesis users related to falls and identify common themes. Focus groups conducted with users from across the United States revealed six main themes related to fall events. These themes included factors such as time, location, activities, and the involvement of the prosthesis in falls.
DISABILITY AND REHABILITATION
(2022)
Article
Multidisciplinary Sciences
Anne T. Turner, Elizabeth G. Halsne, Joshua M. Caputo, Carl S. Curran, Andrew H. Hansen, Brian J. Hafner, David C. Morgenroth
Summary: Prosthetic foot stiffness is crucial for the functional mobility of lower limb prosthesis users, but limited objective data exists for selecting the optimal stiffness category. This study compared forefoot and heel stiffness properties across stiffness categories and foot sizes. The results showed a significant association between stiffness category and measured stiffness, but there was variability in measured stiffness between consecutive categories.
Article
Orthopedics
Talia R. Ruxin, Elizabeth G. Halsne, Anne T. Turner, Carl S. Curran, Joshua M. Caputo, Andrew H. Hansen, Brian J. Hafner, David C. Morgenroth
Summary: This study measured the forefoot and heel linear stiffness properties of various commercial prosthetic foot models and found inconsistencies and differences in relative order. The results highlight the importance of publishing objective stiffness and other mechanical properties of prosthetic feet to aid in better matching them with the functional goals and abilities of prosthesis users.
PROSTHETICS AND ORTHOTICS INTERNATIONAL
(2022)
Article
Orthopedics
Sara J. Morgan, Geoffrey S. Balkman, Ignacio A. Gaunaurd, Anat Kristal, Dagmar Amtmann, Brian J. Hafner
Summary: The aim of this study was to characterize the resources available to clinicians for measuring mobility of people with lower-limb amputation and identify performance tasks used to evaluate prosthetic mobility. Results showed that clinicians generally had small-to-medium spaces, basic measurement equipment, and sufficient training to administer mobility tests in their clinics. Time was identified as a limiting factor, but it can be addressed through selection of efficient measures and collaboration within the rehabilitation team.
JOURNAL OF PROSTHETICS AND ORTHOTICS
(2022)
Article
Biophysics
Elizabeth G. Halsne, Carl S. Curran, Joshua M. Caputo, Andrew H. Hansen, Brian J. Hafner, David C. Morgenroth
Summary: The selection of prosthetic foot for individuals with lower limb amputation is mostly based on clinician judgment. A prosthetic foot emulator (PFE) is introduced as a robotic foot that can mimic the mechanical characteristics of different commercial prosthetic feet. The accuracy of the PFE in emulating the foot properties was verified through mechanical testing and regression analysis. The results showed that the PFE can effectively mimic the commercial prosthetic foot properties, allowing prosthesis users to trial different feet.
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Multidisciplinary Sciences
Andrew Sawers, Cody L. McDonald, Brian J. Hafner
Summary: This study developed a survey questionnaire capable of describing the details of fall events in lower limb prosthesis users. The questionnaire was developed through focus groups and cognitive interviews with diverse samples of prosthesis users, and was validated through administration to a national sample of 235 users. The structured survey provides clinicians and researchers with a standardized and consistent means of documenting and monitoring fall details in this population.
Article
Rehabilitation
Geoffrey S. Balkman, Sara J. Morgan, Dagmar Amtmann, Carolyn Baylor, Brian J. Hafner
Summary: The aim of this research was to develop a new survey instrument to measure the mobility of lower limb orthosis users. Through qualitative methods such as focus groups and cognitive interviews, a candidate item bank consisting of 100 mobility items was generated.
Article
Orthopedics
Christine M. McDonough, Kathleen M. Poploski, Catherine A. Anderson, Thiru M. Annaswamy, Melissa A. Clark, Natalie F. Douglas, Ann Marie Flores, Janet K. Freburger, Brian J. Hafner, Jeanne M. Hoffman, Adam R. Kinney, Kristin Ressel, Jennifer Sanchez, Margarite J. Whitten, Linda Resnik
Summary: The Learning Health Systems Rehabilitation Research Network (LeaRRn), funded by the NIH, aims to enhance the research capacity of learning health systems within the rehabilitation community. A needs assessment survey was conducted to gather data for the development of educational resources.
Article
Rehabilitation
Moaz Tobaigy, Brian J. Hafner, Andrew Sawers
Summary: This study aimed to develop a model that could predict the number of injurious falls over the next 6 months in unilateral LLP users and identify fall-related circumstances that may increase the odds of a fall being injurious. The results showed that the number of falls recalled in the past year and balance confidence scores can predict the number of injurious falls an LLP user will experience in the next 6 months.
Article
Rehabilitation
Cody L. McDonald, Alison Kahn, Brian J. Hafner, Sara J. Morgan
Summary: This study estimated the prevalence of secondary prosthesis use among lower limb prosthesis users and found that most users did not use secondary prostheses. The most common types of secondary prostheses were back-up and activity-specific prostheses. Additionally, secondary prosthesis users differed from non-users in terms of gender, race, and other characteristics.
DISABILITY AND REHABILITATION
(2023)
Article
Multidisciplinary Sciences
Ignacio A. Gaunaurd, Sara J. Morgan, Geoffrey S. Balkman, Anat Kristal, Rachael E. Rosen, Jessica S. Haynes, Robert S. Gailey, Brian J. Hafner
Summary: The Five-time Sit-to-Stand (5xSTS) Test is a performance-based measure used to assess the body functions needed for sit-to-stand transitions. This study aimed to develop a modified protocol for the test, examine its validity among lower limb prosthesis (LLP) users, and assess its correlations with self-reported mobility, balance confidence, and functional capability. The modified test allowed different assistance strategies and showed significant differences in performance based on amputation level, etiology, and functional level. There were also significant negative correlations between the test times and self-reported mobility, balance confidence, and comfortable walking speed.
Article
Rehabilitation
Brian Hafner, Dagmar J. Amtmann, Sara C. Morgan, Daniel L. Abrahamson, Robert M. Askew, Alyssa Bamer, Rana A. Salem, Ignacio S. Gaunaurd, Robert M. Gailey, Stefania Collaborators PLUS-M Advisory Panel, Joseph R. Czerniecki, Stefania Fatone, John E. Fergason, Ian L. Fothergill, Valerie G. Kelly, Eric Weber, Gale Whiteneck
Summary: A PROM called the Prosthetic Limb Users Survey of Mobility (PLUS-M) was developed to measure prosthetic mobility in lower limb amputees. Two short forms with different item lengths were created based on a cross-sectional study. The PLUS-M instruments demonstrated good readability, wide measurement range, strong correlation with existing PROMs, and ability to differentiate between groups with different levels of mobility.
Article
Engineering, Biomedical
Nicholas S. DeGrasse, Joseph C. Mertens, Jacob T. Brzostowski, Katheryn J. Allyn, Andrew C. Vamos, Adam J. Krout, Brian J. Hafner, Joseph L. Garbini, Joan E. Sanders
Summary: The purpose of this study was to test a novel activity monitor that tracks the time a prosthesis is worn and the nature of the ambulatory activity conducted with the prosthesis. The results showed a positive correlation between doff time and active motion time, and a greater amount of time spent in weight shifts compared to walk bouts. This study is important for improving patient care, and further long-term monitoring studies are recommended.
JOURNAL OF REHABILITATION AND ASSISTIVE TECHNOLOGIES ENGINEERING
(2023)
Article
Engineering, Biomedical
Ethan J. Weathersby, Andrew C. Vamos, Brian G. Larsen, Jake B. McLean, Ryan Carter, Katheryn J. Allyn, Daniel Ballesteros, Horace Wang, Nicholas S. DeGrasse, Janna L. Friedly, Brian J. Hafner, Joseph L. Garbini, Marcia A. Ciol, Joan E. Sanders
Summary: The stability of an auto-adjusting socket for maintaining fit was tested in this study. The control system demonstrated stable operation, suggesting that the socket is ready for testing in users' at-home settings.
JOURNAL OF REHABILITATION AND ASSISTIVE TECHNOLOGIES ENGINEERING
(2022)