Organizational Unit:

Rehabilitation Engineering and Applied Research Lab (REAR Lab)

Permanent Link

https://hdl.handle.net/1853/71920

Parent Organization

Organizational Unit

School of Industrial Design

Organizational Unit

George W. Woodruff School of Mechanical Engineering

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Publication Search Results

Now showing 1 - 10 of 14

The Design of a Family of Parametric Anatomically-Based Compliant Buttock Models to Evaluate Wheelchair Cushion Performance - Fabrication Package

(Georgia Institute of Technology, 2022-07) Deshpande, Yogesh ; Sprigle, Stephen

The evaluation of wheelchair cushion performance is of interest to a variety of stakeholders. Over the years, several buttocks models have been used to evaluate wheelchair cushion performance. These vary in design and purpose, and can be generally classified as either rigid or compliant. To date, published studies using buttock models have been limited to using a single size model. Thus, they were designed to evaluate one size of cushions. A need exists to define a series of models that can be used to evaluate cushions of varying sizes. The objective of this project was to develop a family of compliant buttock models that are based upon the anatomical parameters of persons with varying body sizes. This paper will detail the designs, describe the anatomical basis for the design and provide the rationale for the design decisions. Supplemental material includes greater detail; the full CAD files and model fabrication instructions are available in an open access repository for persons who wish to fabricate the models.
Designing an Ergonomic Infant-to-Toddler Rocker Based on Anthropometric Data

(Georgia Institute of Technology, 2020-04-27) Ryan, Caitlin Olivia

Currently ergonomics is not a term frequently associated with infant and toddler products. Many of these products on the market like highchairs, rockers and bouncers aren’t designed using anthropometric data on infants and toddlers. The project focused on gather anthropometric data from children between 0-36 months of age as well as aggregating historic data and utilize the measurements to design an ergonomic rocker that would transition or “grow” with a child from infant to toddler. This takes into account not only the objective size of the infants and toddlers but also designing for the differing use cases for each the infant and the toddler user. The infant users are still developing much of their muscle tone and require a rocker to support their feet in long sitting in a semi-reclined position. While toddlers require a rocker that facilitates upright short sitting as well as independent ingress and egress to accommodate their high activity levels. These disparate needs are not currently being met by similar products on the market leading to a shorted life cycle of the product. Anthropometric data was collected on 55 children and used in tandem with knowledge gained from parent surveys, parent interviews and interacting with children to design a new rocker. The prototype was evaluated by both parents and children to make necessary improvements to the design. The final prototype utilized all the information gathered throughout the entire project resulting in an ergonomic adjustable infant -to-toddler rocker.
Using Anthropometric Measurements to Design Ergonomic Infant and Toddler Gear

(Georgia Institute of Technology, 2019-12-05) Pardue, Emily Louisa

Infants grow so quickly that gear can have a shockingly short life span. Parents often do a quick calculation before purchases: divide the cost by how many months it will be used. Thus, products that are meant to “grow-with-me” or last for multiple infant stages are extremely desirable. Infant-to-toddler rockers are an example of this type of product. However, the researchers have found that the current infant-to-toddler rocker models on the market could be improved. The goal of this project was to use anthropometric data of children to design an ergonomic infant-to-toddler rocker. Anthropometric data was collected on 58 children in order to properly size a new design for a rocker which lasts from 0 to 36 months old. Researchers also found based on parent interviews, a survey, and child interactions, that the needs of infants are very different from the needs of toddlers. Infants are still developing muscle tone, and it is important for them to be supported in a semi-reclined position. Toddlers are extremely active and need a device which allows them to ingress and egress independently. Concepts were developed, and prototypes built to demonstrate the new concepts. These prototypes were then tested with parents and children to gather feedback and improve designs. The final design is an ergonomic rocker which adjusts in size and recline angle to serve the infants that need to be secure and reclined, as well as the ambulatory toddlers.
Encourage sedentary workers' active seating through product design

(Georgia Institute of Technology, 2018-07-31) Ni, Chenan

The purpose of this project is to design a perturbation system for encouraging active sitting. This product would improve the physical environment within which the sedentary workers work and reduce their incidence of musculoskeletal discomfort. Specifically, the sedentary workers would be able to slightly shift postures without being disturbed by the device through an intervention, therefore, encouraging in-seat movement.
User specific assistive technology: Hand mounted switch control platform design

(Georgia Institute of Technology, 2018-04-27) Yuan, Xiuxiu

The purpose of this project is to design a platform for user specific assistive technology. This platform would allow occupational therapists to design and deliver highly customizable hand mounted switch controls for persons with severe disabilities using rapid prototyping tools. Specifically, occupational therapists would be able to adjust a pre-designed model through an intuitive user interface therefore change the design to meet users’ unique needs. The study first conducted literature review about assistive technology and rapid prototyping, then used participatory approach and human centered design methodology, engaged three occupational therapists to design and develop the platform through workshops and interviews. The aims of this project including designing the switch device, platform user interface and system packaging, and evaluating the designs with the occupational therapists. Findings, limitations and future work were discussed in the end.
Assistive Technology Outcomes Measure (ATOM) v2.0

(Georgia Institute of Technology, 2018) Sprigle, Stephen ; Harris, Frances
Aiding lower-limb amputees in traversing uneven terrain through product design

(Georgia Institute of Technology, 2015-08-21) Husack, Mark

The majority of lower-limb amputations are not caused by trauma or cancer, but rather by vascular diseases brought on by Type 2 Diabetes. Many of these patients must have a limb amputated because they have led a sedentary lifestyle and maintained a poor diet for much of their lives. Having a limb amputated can be a wake-up call to these patients, giving them the motivation to change their lifestyle and become more physically active. However, many of these lower-limb amputees are on Medicare or Medicaid and are only covered for their basic walking needs. Due to the high out-of-pocket costs of specialized prostheses needed to perform specific physical activities, it can be more difficult for them to achieve that lifestyle change. This study aims to design a device that will aid lower-limb amputees in traversing uneven terrain with the intent of facilitating outdoor activities.
A smartphone application that informs weight shifting behavior to promote tissue health

(Georgia Institute of Technology, 2015-08-18) Cheng, Philip

One of the most persistent problems affecting wheelchair users is pressure ulcers. These are ulcers that wheelchair users develop in areas of constant pressure or interruption of blood flow to a localized area. Approximately one- third of patients who suffer from spinal cord injuries develop pressure ulcers, and it is a very expensive consequence for these people. Pressure relief exercises can help, but a high percentage of wheelchair users do not perform them enough. Activity trackers today have the ability to sync with smartphone applications to monitor physical activity. The following study uses weight shifting behavior to help wheelchair users. By studying principles of usability engineering and user interface design, the researcher will design a smartphone application that pairs with a weight shift monitoring system to help promote tissue health. The application will illustrate information for the user to make them aware of their behavior and engage them in pressure relief exercises.
Height adjustable wheelchair seat design

(Georgia Institute of Technology, 2011-07-08) Li, Yiran

Full time wheelchair users are at a height disadvantage during many function activities, such as transferring or reaching. Retrieving objects from the ground or a higher shelf while seated in the wheelchair can be both difficult and unsafe. Lateral transfers between surfaces at different heights can be difficult and unsafe. Sit-to-stand transfers are made simpler with a higher seat. This research project seeks to assist reach and transfers by designing a system to raise and lower a wheelchair seat over a 4'' range. The project included several needs assessment: 1) by conducting interviews and surveys, identify design needs from different stakeholder groups; 2) analysis of stakeholder groups' feedback and synthesis into design criteria; and 3) creation of design concepts for the adjustable height wheelchair seat; 4) evaluation of the design by setting up heuristic evaluation criteria and perform user testing; 5) design revision design based on user's performance and feedback. The design process included fabricating and testing of various concepts, validating design through user testing, and addresses technology transfer of the device.
The impact of input during the design of an assistive technology product

(Georgia Institute of Technology, 2010-01-11) Choi, Young Mi

The design of Assistive Technology (AT) products that are highly functional as well satisfactory is presents many challenges. Various types of input are used in design of AT products to help overcome them. A study was conducted to gather data on the impact that different types of input (from simulation tools, a professional therapist, and end users) during the design of an AT product has on the effectiveness, efficiency and satisfaction of the final design. The results show that input from stakeholders (end users or a therapist) can be very effective. However, effectiveness of the input is influenced by many factors and its impact on the design can be highly variable. Input from simulation tools was also found to be equally effective. Implications of these findings for the process of designing AT products are discussed.