Organizational Unit:
Center for Inclusive Design and Innovation

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Author: Sonenblum, Sharon Eve × search.filters.applied.f.resourcesubtype: Paper ×

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Mobility Metrics for Manual Wheelchair Use in Everyday Life

2010-06 , Lopez, Ricardo A. , Sonenblum, Sharon Eve , Sprigle, Stephen

In this study, a method for the robust detection of manual wheelchair movement with accelerometer-based data logging is used to obtain metrics of wheelchair mobility that complement mean- and total-distance-only based measurements. It is found that these metrics, that include distance, time and number of activity bouts, provide better understanding of everyday use of manual wheelchairs by shedding more light into how users operate their wheelchairs in their daily lives.

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Blood Flow and Pressure Changes That Occur With Tilt-in-space

2009 , Sonenblum, Sharon Eve , Sprigle, Stephen

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A Case Study Comparing Activity and Participation Measurement in Two Subjects

2007 , Harris, Frances , Sonenblum, Sharon Eve , Sprigle, Stephen

This 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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Methods for Analysis of Daily Wheelchair Activity Data

2006 , Sonenblum, Sharon Eve

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Blood Flow and Pressure Changes That Occur With Tilt-in-Space

2010-06 , Sonenblum, Sharon Eve , Sprigle, Stephen

The objective of this study was to evaluate the biomechanical responses to tilt in persons with SCI. Changes in blood flow and loading at the ischial tuberosities (ITs) across different amounts of tilt were measured with Laser Doppler flowmetry and interface pressure. Pressure reduction at the IT was not present at 15°, but did occur with tilts to 30° and greater. Unlike pressure, blood flow increased with all tilts from an upright position. Only 4 of 11 participants had a considerable increase (≥10%) in blood flow at 30° tilt, whereas 9 participants did during maximum tilt (i.e., 45°-60°). Based on the results of this study, tilting for pressure reliefs as far as the seating system permits is recommended to maximize the potential for significant blood flow increases and pressure relief. The use of interim small tilts is also supported, as they also provide some benefit.

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Understanding Wheelchair Use Patterns: Tilt-in-Space

2008-03 , Sonenblum, Sharon Eve , Sprigle, Stephen , Harris, Frances , Maurer, Chris

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Mobility Patterns in Power Wheelchair Users and the Implications for Measuring Mobility

2007 , Sonenblum, Sharon Eve , Sprigle, Stephen , Maurer, Chris

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Blood Flow and Pressure Changes That Occur With Tilt-in-Space

2009 , Sonenblum, Sharon Eve

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Impact of Tilt-in-Space Power Wheelchairs on Health, Activity, and Participation

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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Monitoring Power Upright and Tilt-In-Space Wheelchair Use

2006 , Sonenblum, Sharon Eve , Sprigle, Stephen , Maurer, Chris

This 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.

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