Organizational Unit:
Center for Inclusive Design and Innovation

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Publication Search Results

Now showing 1 - 10 of 18
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The Accuracy of New Wheelchair Users’ Predictions about their Future Wheelchair Use

2012-06 , Hoenig, Helen , Griffiths, Patricia , Ganesh, Shanti , Caves, Kevin , Harris, Frances

Objective—This study examined the accuracy of new wheelchair user predictions about their future wheelchair use. Design—Prospective cohort study of 84 community dwelling veterans provided a new manual wheelchair. Results—The association between predicted and actual wheelchair use was strong at 3-months (phi coefficient = .56), with 90% of those who anticipated using the wheelchair at 3-months still using it (i.e., positive predictive value 0.96) and 60% of those who anticipated not using it indeed no longer using the wheelchair (i.e., negative predictive value 0.60, overall accuracy 0.92). Predictive Accuracy diminished over time, with overall accuracy declining from 0.92 at 3-months to 0.66 at 6-months. At all time points, and for all types of use, patients better predicted use as opposed to disuse, with correspondingly higher positive than negative predictive values. Accuracy of prediction of usage in specific indoor and outdoor locations varied according to location. Conclusions—This study demonstrates the importance of better understanding the potential mismatch between the anticipated and actual patterns of wheelchair use. The findings suggest that users can be relied upon to accurately predict their basic wheelchair-related needs in the short term. Further exploration is needed to identify characteristics that will aid users and their providers in more accurately predicting mobility needs for the long-term.

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Ball Targeting System with Positive Feedback

Instructions for making a portable variable impact ball targeting system with light and audio feedback.

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The Accuracy Of New Wheelchair User Predictions About Their Future Wheelchair Use

2010-06 , Hoenig, Helen , Griffiths, Patricia , Harris, Frances , Caves, Kevin , Sprigle, Stephen

This study examined the accuracy of new wheelchair user predictions about their future wheelchair use. We used an existing database of 71 new manual wheelchair users with data obtained at baseline, 3-­‐ and 6-‐months to examine the specificity, sensitivity, positive and negative predictive value of user predictions about anticipated amount and locations of wheelchair use. At 3-­‐months, the correlation between predicted and actual use was strong, with 90% of those who thought they would still be using the wheelchair still using it, and 60% of those who said they would not be using it indeed were not using the wheelchair. By 6-­‐months the predictive utility diminished substantially. Only 70% of subjects accurately predicted their continued use, while only 50% correctly predicted they would not be using their wheelchairs. This study demonstrates the importance of better understanding the potential mismatch between the anticipated and actual patterns of wheelchairs use.

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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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Assessment of the ISO Impact Damping Test

2012 , Sprigle, Stephen , Chung, Bummo , Meyer, Tobias

The ISO impact damping test characterizes wheelchair cushion abilities to reduce impact loading on issues and to help maintain postural stability, reporting the number of rebounds greater than 10% of the peak impact acceleration and the ratio of the 2nd to 1st rebound. Based upon our analysis, 3 critical issues have been identified. 1) Impact magnitude should be part of the analysis. 2) Impact should be used instead rebound accelerations. 3) Oscillation from impact is not a simple 2nd order damped harmonic, instead several natural frequencies are embedded in the damped oscillation. In conclusion, ISO should utilize impact accelerations and more complex analysis to characterize the damping properties of wheelchair cushions.

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Wiimote Modification for Persons with Disabilities

This instructable will show you how to rewire the button of the Wiimote to bigger buttons so that persons with disabilities will be able to efficiently use the Wiimote by not having to press the small buttons on the Wiimote. The buttons that will be rewired will be the A button, B button, the directional pad (up, down, left, right), and the Home button.

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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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Instructions for Making a Four Bar Linkage Attachment for Center Mounted Footrest

2011 , Holland, Kimberly

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Bottle Feeding of Low Facial Muscle Tone Infants

Instructions for making a device to hold bottle to feeding hand.

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Study on Alleviation Pressure Cushion

2010-06 , Kong, Linghua , Sprigle, Stephen , Davis, Kim , Wang, Chao

The alleviation pressure (AP) cushion is a dynamic cushion system with three bladders at the pelvic region. The bladders can be deflated and inflated in a certain sequence to relieve the pressure on the ischial tuberosiites (IT) and coccyx/sacrum. The design of the foam base, bladder and pneumatic and electronic system of the AP cushion is discussed in this paper. And testing is conducted to verify the effectiveness of the AP cushion.

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