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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1 - 10 of 16
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ItemAssistive Technology Outcomes Measure (ATOM) v2.0(Georgia Institute of Technology, 2018) Sprigle, Stephen ; Harris, Frances
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ItemSurvey of Users of Wheelchair Seat Elevators(Georgia Institute of Technology, 2017) Sprigle, StephenThis is a technical report to document and share the data collected using an on-line anonymous survey of wheelchair users who use seat elevators..
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ItemDesign of a Robotic System to Measure Propulsion Work of Over-ground Wheelchair Maneuvers(Georgia Institute of Technology, 2014) Liles, Howard ; Huang, Morris ; Caspall, Jayme ; Sprigle, StephenA wheelchair-propelling robot has been developed to measure the efficiency of manual wheelchairs. The use of a robot has certain advantages compared to the use of human operators with respect to repeatability of measurements and the ability to compare many more wheelchair configurations than possible with human operators. Its design and implementation required significant engineering and validation of hardware and control systems. The robot can propel a wheelchair according to pre-programmed accelerations and velocities and measures the forces required to achieve these maneuvers. Wheel velocities were within 0.1 m/s of programmed values and coefficients of variation (CV) < 2%. Torque measurements were also repeatable with CV <10%. By determining the propulsion torque required to propel the wheelchair through a series of canonical maneuvers, task-dependent input work for various wheelchairs and configurations can be compared. This metric would serve to quantify the combined inertial and frictional resistance of the mechanical system.
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ItemLow Profile Tension Seat for Wheelchair Users who Propel with One or Both Feet(Georgia Institute of Technology, 2012-03) Sprigle, Stephen
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ItemAssessment of the ISO Impact Damping Test(Georgia Institute of Technology, 2012) Sprigle, Stephen ; Chung, Bummo ; Meyer, TobiasThe 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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ItemThe Accuracy Of New Wheelchair User Predictions About Their Future Wheelchair Use(Georgia Institute of Technology, 2010-06) Hoenig, Helen ; Griffiths, Patricia ; Harris, Frances ; Caves, Kevin ; Sprigle, StephenThis 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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ItemMobility Metrics for Manual Wheelchair Use in Everyday Life(Georgia Institute of Technology, 2010-06) Lopez, Ricardo A. ; Sonenblum, Sharon Eve ; Sprigle, StephenIn 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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ItemStudy on Alleviation Pressure Cushion(Georgia Institute of Technology, 2010-06) Kong, Linghua ; Sprigle, Stephen ; Davis, Kim ; Wang, ChaoThe 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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ItemBlood Flow and Pressure Changes That Occur With Tilt-in-Space(Georgia Institute of Technology, 2010-06) Sonenblum, Sharon Eve ; Sprigle, StephenThe 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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ItemAnatomical Model Propulsion System: Measuring Manual Wheelchair Efficiency(Georgia Institute of Technology, 2010) Dao, Phuc ; Sprigle, Stephen ; Caspall, Jayme ; Ferri, Aldo A. ; Eicholtz, Matthew ; Wang, StanThe goal of this project was to produce a test device and methodology capable of measuring the mechanical efficiency of manual wheelchairs. The result would provide an objective measure of wheelchair performance that are required to effectively prescribe wheelchairs and to code wheelchairs properly for reimbursement.