Person:
Sprigle,
Stephen
Sprigle,
Stephen
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ORCID
0000-0003-0462-0138
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Publication Search Results
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ItemBlood Flow and Pressure Changes That Occur With Tilt-in-space(Georgia Institute of Technology, 2009) Sonenblum, Sharon Eve ; Sprigle, Stephen
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ItemUnderstanding Wheelchair Use Patterns: Tilt-in-Space(Georgia Institute of Technology, 2008-03) Sonenblum, Sharon Eve ; Sprigle, Stephen ; Harris, Frances ; Maurer, Chris
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ItemBruise chromophore concentrations over time(Georgia Institute of Technology, 2008) Duckworth, Mark G. ; Caspall, Jayme J. ; Mappus IV, Rudolph L. ; Kong, Linghua ; Yi, Dingrong ; Sprigle, StephenDuring investigations of potential child and elder abuse, clinicians and forensic practitioners are often asked to offer opinions about the age of a bruise. A commonality between existing methods of bruise aging is analysis of bruise color or estimation of chromophore concentration. Relative chromophore concentration is an underlying factor that determines bruise color. We investigate a method of chromophore concentration estimation that can be employed in a handheld imaging spectrometer with a small number of wavelengths. The method, based on absorbance properties defined by Beer-Lambert's law, allows estimation of differential chromophore concentration between bruised and normal skin. Absorption coefficient data for each chromophore are required to make the estimation. Two different sources of this data are used in the analysis- generated using Independent Component Analysis and taken from published values. Differential concentration values over time, generated using both sources, show correlation to published models of bruise color change over time and total chromophore concentration over time.
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ItemImpact of Tilt-in-Space Power Wheelchairs on Health, Activity, and Participation(Georgia Institute of Technology, 2008) Harris, Frances ; Sonenblum, Sharon Eve ; Sprigle, Stephen ; Maurer, Christine L.This paper reports the results of a pre-post outcomes study on the impact of tilt-in-space power wheelchairs on the health, activity, and participation of 5 subjects. Using a methodology which combines traditional self-reports and activity monitoring technology, subjects who had previously used an upright power wheelchair were monitored at baseline and 3 months following receipt of a new tilt-in-space power wheelchair. Subjects visited similar numbers of destinations pre and post. However, wheelchair use metrics - including occupancy time, distance wheeled, and number of bouts - varied pre and post, without a consistent direction of change. Quality of life measured as self-perceived health status increased in all subjects. Although subject population is too small to generalize results, this study illustrates the complexity of participation measurement and the utility of this methodology to provide insights into the relationship between wheelchair use and activity and participation.
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ItemThe Science of Interface Pressure Mapping - Updates for Clinical Application(Georgia Institute of Technology, 2008) Davis, Kim ; Sprigle, StephenInterface pressure mapping (IPM) has long been a useful assessment tool to augment the seating evaluation. Technological improvements in both hardware and software have made steady advances across manufacturers. Likewise, progress has been made in the scientific study of the clinical application of pressure mapping. This course will focus on the science behind IPM and recent research findings which influence clinical interpretation of the map. Phenomena such as creep, the effect of the mat and the influence of cushion materials will be highlighted. Additionally, reliability of specific metrics will be discussed, with a de-emphasis on the use of single sensel peak pressure values. Emphasis will be placed on the importance of using a consistent IPM protocol within your seating clinic to make relative cushion comparisons.
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ItemInvestigation of the Lifespan for Wheelchair Cushions used on a Daily Basis(Georgia Institute of Technology, 2008) Rivard, David M. ; Sprigle, Stephen ; Linden, MaureenWheelchair cushions function to mediate seating pressures and provide postural stability. For the majority of cushions used on average 12 hours daily, the cover and interior components degrade at varying rates while performance for their intended purposes diminishes resulting in an increased risk for skin health deterioration and inadequate postural support. While age and use are determinants of cushion degradation, additional factors or combinations of factors contribute to rate of wear. At present there is no validated metric whereby clinicians and users may asses cushion condition and replacement of a potentially worn cushion. A multiple phase collaborative research project conducted at the Shepherd Center is currently testing the functionality and degradation of wheel chair cushions. Preliminary visual assessments indicate that some cushions are used inadequately while others responded to postural deformities. Loaded contour depth analysis revealed that age and cushion construction alone are not significant predictors. A supplementary benefit from this study is the documentation of critical factors to cushion wear and failure; whereby, clinicians and users can be educated on proper care and preventative measures to reduce wear; whereby, optimizing health benefits for the user and possibly increasing the lifespan of the cushion.
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ItemOutcomes of an Assistive Technology Intervention Among Wheeled Mobility Users(Georgia Institute of Technology, 2007) Harris, Frances ; Sprigle, StephenThis paper reports the outcomes of an assistive technology (AT) intervention among seating and mobility clients at an acute rehabilitation hospital between 2002 and 2004. Three instruments, OTFACT, PIADS, and the ATOM, were administered during baseline and assessments made at 1 and 12 months post-intervention. Results showed that the measures were not significantly correlated at baseline, post 1 and post 12 months, indicating the intervention had a dissimilar impact on their respective constructs. Results are discussed in terms of methodological implications for future outcomes studies.
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ItemA Case Study Comparing Activity and Participation Measurement in Two Subjects(Georgia Institute of Technology, 2007) Harris, Frances ; Sonenblum, Sharon Eve ; Sprigle, StephenThis case study compares the differences between complementary methodologies that measure activity and participation in two subjects who use wheeled mobility devices. Data collection consisted of 1) a self-report participation measure for people with mobility disabilities - the Community Participation and Perceived Receptivity Survey (CPPRS) - and 2) a passive instrumentation data-gathering methodology that includes a global positioning system (GPS) data logger, followed by a prompted recall interview (PRI) to confirm GPS data location and query activity purpose. Many of the destination types (e.g., grocery stores) named in the CPPRS were confirmed by GPS/PRI data. Issues affecting subject responses in both methods included ambiguous categories and researcher assumptions about the nature of activity. Differences between self-report and instrumentation data are discussed as they impact understanding activity and community participation among wheeled mobility users and the development of self-report participation instruments.
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ItemMobility Patterns in Power Wheelchair Users and the Implications for Measuring Mobility(Georgia Institute of Technology, 2007) Sonenblum, Sharon Eve ; Sprigle, Stephen ; Maurer, Chris
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ItemMonitoring Power Upright and Tilt-In-Space Wheelchair Use(Georgia Institute of Technology, 2006) Sonenblum, Sharon Eve ; Sprigle, Stephen ; Maurer, ChrisThis study examines the use of power upright and power tilt-in-space (TIS) wheelchairs. An occupancy detector, wheel revolution counter, and position sensor comprise the Wheelchair Activity Monitoring Instrument as used in this study. On average, subjects sat in their wheelchairs for 10 hours per day, spent 50 (±24) minutes wheeling with an average daily distance traveled of 0.84 miles. The majority of mobility bouts were less than 30 seconds and shorter than 25 feet. Subjects with TIS used their tilt feature (at least a 15° change in position) 16±10 times and spent between 0 and 108 minutes at a fully tilted (>40°) position daily.occupancy detector, wheel revolution counter, and position sensor comprise the Wheelchair Activity Monitoring Instrument as used in this study. On average, subjects sat in their wheelchairs for 10 hours per day, spent 50 (±24) minutes wheeling with an average daily distance traveled of 0.84 miles. The majority of mobility bouts were less than 30 seconds and shorter than 25 feet. Subjects with TIS used their tilt feature (at least a 15° change in position) 16±10 times and spent between 0 and 108 minutes at a fully tilted (>40°) position daily.