Characterizing the community use of an ultralight wheelchair with “on the fly” adjustable seating functions: A pilot study

Mattie, Johanne; Borisoff, Jaimie; Miller, William C.; Noureddin, Borna

doi:10.1371/journal.pone.0173662

Cited by 9 publications

(6 citation statements)

References 29 publications

(44 reference statements)

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“…The high variability measured in this study, both within and across subjects is consistent with all previous measurements of wheelchair use (e.g., Mattie et al, 2017;Sonenblum et al, 2016). In Sonenblum et.…”

Section: Discussionsupporting

confidence: 91%

“…Mattie et. al used a similar approach in their study of changes in seat elevation (Mattie et al, 2017). In the present study, the majority of participants behaved liked the habitual group in the Sonenblum et.…”

Section: Discussionsupporting

confidence: 52%

“…Overall, the amount of time this cohort spent in their wheelchairs (mean = 8.5 h) was less than seen in many previous studies of persons using power wheelchairs (Ding, Cooper, Cooper, & Kelleher, 2007;Ding et al, 2008;Sonenblum & Sprigle, 2011;Sonenblum et al, 2008) and manual wheelchairs (Mattie et al, 2017;Sonenblum et al, 2016;Tolerico et al, 2007;Yang, Chang, Hsu, & Chang, 2009). However, there appeared to be two subgroups in this study, one who used their wheelchair for less than 6 h per day, which was unlike the populations previously studied, and those who used their wheelchair between 8 and 16 h per day, which was much more consistent with the previously published values between 10 and 12 h per day (Ding et al, 2007(Ding et al, , 2008Sonenblum & Sprigle, 2011;Sonenblum et al, 2008) in power wheelchairs and between 8 and 11 h per day (Mattie et al, 2017;Sonenblum et al, 2016;Tolerico et al, 2007;Yang et al, 2009) in manual wheelchairs. It is also important to note that the current population was significantly less integrated than the average population with physical disabilities studied using the CIQ (Hirsh et al, 2011).…”

Section: Discussionmentioning

confidence: 56%

“…They reported that participants elevated between 0.3 and 2.5 times per day. A more recent study measured changes in seat height in a manual wheelchair with "on the fly" adjustable seating functions and found that across eight participants, individuals changed their position approximately 8.7 times per day (Mattie, Borisoff, Miller, & Noureddin, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Everyday use of power adjustable seat height (PASH) systems

Sonenblum

Maurer

Hanes

et al. 2019

Assistive Technology

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The objective of this study was to measure how, why, and where the power adjustable seat height (PASH) system of Quantum's iLevel® wheelchairs were used. We instrumented iLevel® power wheelchairs for 24 adults to measure wheelchair occupancy, seat height, in-seat activity level, and bouts of mobility. Participants elevated their wheelchair 3.9 (4.4) (mean (SD)) times per day, including 1.0 (1.6) times per day past 9". Twenty-nine percent of elevation events were transient, lasting < 1 min, while 42% of elevate events lasted >5 minutes. Sixty-seven percent of participants transferred while elevated at least once, typically from heights <5" or >9", and 14 people changed their seat height between the transfer to and from the wheelchair. Twenty-three of 24 participants wheeled while elevated. Finally, in-seat activity level was greater while elevated. For many participants, the PASH system provided a functional benefit on a daily basis. Individuals elevated 4 times per day for activities including transfers, reach, gaze, or mobility. However, 14 participants did not elevate on at least 1 day. Further study is needed to identify the characteristics of people who will benefit most from a PASH system as well as to document the value associated with PASH system use.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

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Everyday use of power adjustable seat height (PASH) systems

Sonenblum

Maurer

Hanes

et al. 2019

Assistive Technology

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“…Currently most manual wheelchairs are designed with a fixed frame [15], but more recent innovative designs allow users to adjust the seat angle and backrest angle ‘on-the-fly’ to suit their purposes [16]. These changes affect static stability by changing the centre of gravity of the system [17].…”

Section: Introductionmentioning

confidence: 99%

Manual wheelchair downhill stability: an analysis of factors affecting tip probability

Thomas

Borisoff

Sparrey

2018

J NeuroEngineering Rehabil

Self Cite

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BackgroundFor people who use manual wheelchairs, tips and falls can result in serious injuries including bone fractures, concussions, and traumatic brain injury. We aimed to characterize how wheelchair configuration changes (including on-the-fly adjustments), user variables, and usage conditions affected dynamic tip probability while rolling down a slope and contacting a small block.MethodsRigid body dynamic models of a manual wheelchair and test dummy were created using multi-body software (Madymo, TASS International, Livonia, MI), and validated with 189 experiments. Dynamic stability was assessed for a range of seat angles (0 to 20° below horizontal), backrest angles (0 to 20°), rear axle positions (0 to 20 cm from base of backrest), ground slopes (0 to 15°), bump heights (0 to 4 cm), wheelchair speeds (0 to 20 km/hr), user masses (50 to 115 kg), and user positions (0 to 10 cm from base of backrest). The tip classifications (forward tip, backward tip, rolled over bump, or stopped by bump) were investigated using a nominal logistic regression analysis.ResultsFaster wheelchair speeds significantly increased the probability of tipping either forward or backward rather than stopping, but also increased the probability of rolling over the bump (p < 0.001). When the rear axle was positioned forward, this increased the risk of a backward tip compared to all other outcomes (p < 0.001), but also reduced the probability of being stopped by the bump (p < 0.001 compared to forward tip, p < 0.02 compared to rolling over). Reclining the backrest reduced the probability of a forward tip compared to all other outcomes (p < 0.001), and lowering the seat increased the probability of either rolling over the bump or tipping backwards rather than tipping forward (p < 0.001). In general, the wheelchair rolled over bumps < 1.5 cm, and forwards tipping was avoided by reducing the speed to 1 km/hr.ConclusionsThe probability of forward tipping, corresponding to the greatest risk of injury, was significantly reduced for decreased speeds, smaller bumps, a reclined backrest, and a lower rear seat height. For wheelchairs with dynamic seating adjustability, when travelling downhill, on-the-fly adjustments to the seat or backrest can increase the likelihood of safely rolling over a bump.

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The Validity of Rasterstereography as a Technological Tool for the Objectification of Postural Assessment in the Clinical and Educational Fields: Pilot Study

Berardi

Galeoto

Tofani

et al. 2019

Advances in Intelligent Systems and Computing

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The present study aimed to validate Formetric 4D with wheelchair users in a sitting position, comparing the results with the data obtained from a postural assessment. Nine individuals with spinal cord injury were evaluated through postural assessment. Each individual was subjected to rasterstereography in a sitting position using the Formetric 4D. Test-retest reliability was evaluated, after four hours: at first, the detection was performed on the same participant three times by three different rater. After four hours, the detection was repeated by the first operator. This study highlighted the ability of Formetric 4D to provide consistent results at different times and with different evaluators, reporting a Cronbach's alpha of 0.74 and excellent intra-and inter-operator stability with an ICC of 0.91 to 0.96. Compared to the postural evaluation, the degree of accuracy of the measurements acquired with Formetric 4D, analyzed through Spearman's rho, showed statistically significant positive correlations with anthropometric measurements. The present study provides information enabling the use of the Formetric 4D tool in clinical, research, and educational settings this will be a very useful tool that allows students to have a three-dimensional representation of the anatomical components involved in the sitting position, helping them to learn and gain an in-depth understanding of how to perform an objective postural assessment examination.

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Characterizing the community use of an ultralight wheelchair with “on the fly” adjustable seating functions: A pilot study

Cited by 9 publications

References 29 publications

Everyday use of power adjustable seat height (PASH) systems

Everyday use of power adjustable seat height (PASH) systems

Manual wheelchair downhill stability: an analysis of factors affecting tip probability

The Validity of Rasterstereography as a Technological Tool for the Objectification of Postural Assessment in the Clinical and Educational Fields: Pilot Study

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