Sliding and pressure evaluation on conventional and V-shaped seats of reclining wheelchairs for stroke patients with flaccid hemiplegia: a crossover trial

Huang, Haoping; Yeh, Cheng Hsin; Chen, Chi Myn; Lin, Yu Wen; Chung, Kao‐Chi

doi:10.1186/1743-0003-8-40

Cited by 20 publications

(20 citation statements)

References 14 publications

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“…In a wheelchair-seated posture, P-WC meets this range. Although simple reclining was related to the problem of forward sliding [56], the backrest shape of the P-WC corresponds to the spinal curve, and this feature helps prevent forward sliding by receiving upper body mass properly.…”

Section: Measured Variablesmentioning

confidence: 99%

Does the backrest shape of the wheelchair influence the asymmetric posture of patients with hemiparesis? A single institution pilot study

Ukita¹,

Abe²,

Nikaido³

et al. 2017

Biomed Res Clin Prac

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We have previously reported the effect of wheelchair with a unique backrest shape with pelvic and thoracic support (P-WC) on healthy individuals. However, the actual effect of P-WC on real users is still unclear. Therefore, the purpose of this study was to investigate the effect of different backrest shapes on asymmetric seated posture and pressure points in patients with hemiplegia. We compared a typical wheelchair with a flat backrest (T-WC) to P-WC. Ten subjects with hemiparesis were analyzed. Outcome measures were body alignment angles and pressure distributions of the supporting surfaces. The total seat pressure decreased (p<0.01) and total back pressure increased (p<0.05), in P-WC compared with T-WC. The head-neck was more upright (p<0.05) in P-WC than in T-WC. Moreover, the center of pressure was located in the middle of both the seat and backrest (p<0.05), and the high unilateral pressure around the ischial tuberosity was dispersed (p<0.05) in P-WC. In conclusion, the backrest shape of the P-WC contributes to reducing postural asymmetry. These results highlight the importance of the shape of the wheelchair backrest for patients with hemiparesis.

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Section: Measured Variablesmentioning

confidence: 99%

Does the backrest shape of the wheelchair influence the asymmetric posture of patients with hemiparesis? A single institution pilot study

Ukita¹,

Abe²,

Nikaido³

et al. 2017

Biomed Res Clin Prac

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show abstract

“…Previous studies have proposed numerous dynamic devices for relieving pressure through periodically changing sitting positions; such devices include dynamic lumbar supports, dynamic reclined backrests, and dynamic ischial/femur cushions [20, 21, 24–27]. However, no study to date has examined whether combining these pressure-relieving devices produces a positive or negative effect.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies have proposed numerous dynamic devices for relieving lumbar loading, such as dynamic lumbar supports, dynamic reclined backrests, and dynamic ischial/femur cushions [20, 21, 24–27]. Findings have confirmed that such devices can periodically adjust the sitting position, stimulate body movement, and improve the loading from prolonged static sitting [20, 21, 24–27].…”

Section: Introductionmentioning

confidence: 99%

“…Findings have confirmed that such devices can periodically adjust the sitting position, stimulate body movement, and improve the loading from prolonged static sitting [20, 21, 24–27]. In clinical observations, many wheelchair users employ more than one of these pressure-relieving devices simultaneously because their functions do not conflict with one another.…”

Section: Introductionmentioning

confidence: 99%

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Comparing the effects of different dynamic sitting strategies in wheelchair seating on lumbar-pelvic angle

Peng

Tseng

et al. 2016

BMC Musculoskelet Disord

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BackgroundProlonged static sitting in a wheelchair is associated with an increased risk of lower back pain. The wheelchair seating system is a key factor of this risk because it affects spinal loading in the sitting position. In this study, 7 dynamic sitting strategies (DSSs) are examined: lumbar prominent dynamic sitting (LPDS), back reclined dynamic sitting (BRDS), femur upward dynamic sitting (FUDS), lumbar prominent with back reclined dynamic sitting (LBDS), lumbar prominent with femur upward dynamic sitting (LFDS), back reclined with femur upward dynamic sitting (BFDS), and lumbar prominent with back reclined with femur upward dynamic sitting (LBFDS). The objective of this study was to analyze the biomechanical effects of these sitting strategies on lumbar-pelvic angles.MethodsTwenty able-bodied participants were recruited for the study. All participants performed LPDS, BRDS, FUDS, LBDS, LFDS, BFDS, and LBFDS in a random order. All lumbar-pelvic angle parameters, including the static lumbar angle, static pelvic angle, lumbar range of motion, and pelvic range of motion were measured and compared.ResultsResults show that LBDS and LBFDS enabled the most beneficial lumbar movements, although the difference between the 2 strategies was nonsignificant. BRDS and BFDS enabled the most beneficial pelvic movements, although the difference between the 2 strategies was nonsignificant. Among all the upright DSSs, LPDS and LFDS enabled the most beneficial lumbar and pelvic movements, although no significant difference was observed between these 2 strategies.ConclusionsWe identified the effects and differences among 7 DSSs on lumbar-pelvic angles. Wheelchair users can choose the most suitable DSS that meets their needs. These findings may serve as a reference for practicing physicians or wheelchair users to choose an appropriate dynamic wheelchair seating system.Trial registration ISRCTN12389808, 18th November 2016, retrospectively registered.

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“…The accuracy of the pressure sensitive mat was validated in a previous study (Huang, Yeh, Chen, Lin, & Chung, 2011); the absolute mean pressure errors over a 0.097 to 3.867 Newton/cm 2 (N/ cm 2 ) range was shown to be less than 10%.…”

Section: Experimental Designmentioning

confidence: 99%

Evaluation of Contact Pressure and Biomechanical Exposures on Different Work Surface Hardness

Kim

Aulck

Trippany³

et al. 2014

Proceedings of the Human Factors and Ergonomics Society Annual

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Contact pressure has been identified as a risk factor for musculoskeletal disorders (MSDs) in various occupational settings. Given that contact pressure over the palmar aspect of the wrists may increase risks for MSDs, the present study was designed to determine whether a work surface with a soft leading edge could reduce contact pressure and subjective musculoskeletal discomfort without affecting task performance during a series of standardized computer work tasks. Using a repeated-measures blinded experimental design with eighteen subjects, during the performance of a series of standardized computer work tasks, contact pressure, computer work performance and perceived fatigue in the upper extremities were evaluated and compared between a conventional hard-edge and soft-edge work surface. The results found that contact pressure and perceived fatigue in the wrists were lower on the soft-edge work surface compared to the conventional hard-edged work surface (p's < 0.03), whereas no differences were found in computer task performance between the two work surfaces. The study findings showed that softedge work surface reduced contact pressure in the wrists and the reduction in contact stress may reduce the risks for developing work-related MSDs when working at the computer.

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Sliding and pressure evaluation on conventional and V-shaped seats of reclining wheelchairs for stroke patients with flaccid hemiplegia: a crossover trial

Cited by 20 publications

References 14 publications

Does the backrest shape of the wheelchair influence the asymmetric posture of patients with hemiparesis? A single institution pilot study

Does the backrest shape of the wheelchair influence the asymmetric posture of patients with hemiparesis? A single institution pilot study

Comparing the effects of different dynamic sitting strategies in wheelchair seating on lumbar-pelvic angle

Evaluation of Contact Pressure and Biomechanical Exposures on Different Work Surface Hardness

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