Influence of rotational axis height of back support on horizontal force applied to buttocks in a reclining wheelchair

Kobara, Kazukuni; Osaka, Hiroshi; Takahashi, Hisashi; Ito, Teruaki; Fujita, Daisuke; Watanabe, Susumu

doi:10.1177/0309364614543547

Cited by 4 publications

(6 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results might be caused by the difference in the rotational axis position of the back support [4][5][6]. In the trochanter-axis position in this study, the trunk slid upward along the back support, and the distance the trunk slid was very small.…”

Section: Changes To the Horizontal Force By Reclining The Back Supportmentioning

confidence: 60%

“…The results suggested that leg supports should be positioned downward before reclining the back support of a wheelchair to decrease the shear force acting on the buttocks. The locus of the back support inclination changed with respect to the rotational axis position of the back support [4,6]. This infers that leg support elevation influences the fluctuation of the shear force acting on the buttocks when reclining the back support.…”

Section: Introductionmentioning

confidence: 93%

“…Therefore, it is important to evaluate the reduction in the shear force acting on the buttocks when such a wheelchair's back support is reclined. In previous research [4][5][6], we investigated the functions that reclining wheelchairs should possess to reduce the shear force acting on the buttocks by reclining the back support. The results obtained suggest that the rotational axis position of the back support of reclining wheelchairs should be adjustable closer to hip joint.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Leg Support Elevation on Horizontal Force Acting on the Buttocks in a Reclining Wheelchair in Different Rotational Axis Positions of the Back Support

Kobara¹,

Fujita²,

Osaka³

et al. 2015

J Ergonomics

View full text Add to dashboard Cite

Purpose: The purpose of this study was to investigate how the influences of leg support elevation on the horizontal force acting on the buttocks in a reclining wheelchair changes in various rotational axis positions of the back support. Materials and methods:The participants were 13 healthy men. The horizontal force was measured using a force plate on the experimental chair. Four experimental conditions were tested: the leg-down condition in the rearaxis and trochanter-axis positions of back support and the leg-up condition in the rear-axis and the trochanter-axis positions. The back support was reclined at increasing angles, beginning with the initial upright position (IUP) and proceeding to the fully reclined position (FRP). We calculated the variation rate of the forces acting on the buttocks between the FRP and the IUP (FRP/IUP*100: %). Results:In the trochanter-axis position, the variation rate of the leg-down and the leg-up conditions was 155.6 ± 29.1% and 119.3 ± 10.7%, respectively. In the rear-axis position, the variation rate of the leg-down and the leg-up condition were 100.7 ± 16.7% and 96.3 ± 10.2%, respectively. There were significant differences in the variation rate between the leg-down and leg-up conditions in the trochanter-axis position, but there were not significant differences in the rear-axis position. Conclusion:The extent of the influence of leg support elevation on the horizontal force acting on the buttocks in a reclining wheelchair decreases when the rotational axis of the back support is placed close to the trochanter.

show abstract

Section: Changes To the Horizontal Force By Reclining The Back Supportmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Leg Support Elevation on Horizontal Force Acting on the Buttocks in a Reclining Wheelchair in Different Rotational Axis Positions of the Back Support

Kobara¹,

Fujita²,

Osaka³

et al. 2015

J Ergonomics

View full text Add to dashboard Cite

show abstract

“…In the RUP, under both experimental conditions, the forward horizontal force acting on the buttocks increased significantly in comparison with that in the FRP as the back support reclined. In previous research 4 , 5 , 6 ) , we investigated the mechanism of the increase in the horizontal force acting on buttocks from the FRP to RUP. The results suggested that the increase in horizontal force was produced by the friction force on the back support and the difference in the position of the rotational axes of the back supports and the trunk-pelvis.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, it is important to evaluate the reduction in the shear force acting on the buttocks when such a wheelchair’s back support is reclined. In our previous research 4 , 5 , 6 ) , we investigated the functions that reclining wheelchairs should possess to reduce the shear force acting on the buttocks when reclining the back support. The results obtained suggested that reclining wheelchairs should be adjustable with the rotational axis position of the back support closer to the hip joint.…”

Section: Introductionmentioning

confidence: 99%

Investigation of effect of leg support elevation timing on the horizontal force acting on the buttocks in a reclining wheelchair

et al. 2015

Self Cite

View full text Add to dashboard Cite

[Purpose] The purpose of this study was to investigate the effect of the timing of leg support elevation on the horizontal force acting on the buttocks in a reclining wheelchair. [Subjects and Methods] The participants were 17 healthy men. Two experimental conditions were tested: the leg-down and leg-up conditions. The back support was reclined at increasing angles, from the initial upright position (IUP), proceeding to the fully reclined position (FRP), and returned to the upright position (RUP). The posterior inclination phase was from IUP to FRP, and the returning inclination phase was from FRP to RUP. [Results] The horizontal force under the leg-up condition was significantly higher than that under the leg-down condition in all positions of back support. [Conclusion] The leg supports should be positioned downward before reclining the back support of a wheelchair.

show abstract

The Shift of the Ischial Region during Maneuvering the Standard Wheelchair and the Electric Wheelchair in Healthy Adults

Uemura¹,

Sugimoto²,

Shimizu³

et al. 2021

IJCM

View full text Add to dashboard Cite

Pressure injuries are frequent secondary complications that occur in patients with Spinal Cord Injury (SCI), and the recurrence rate of ischial pressure injury is highest in SCI patients. Most SCI patients use wheelchairs, and some studies have shown a relationship between buttock pressure and sitting posture. However, the pressure distribution during wheelchair maneuvering is unclear. We measured and compared the shift of the ischial region when maneuvering a standard wheelchair or electric wheelchair in healthy adults. The subjects drove wheelchairs on a flat ground of 10 m and the shift of ischial region was measured with a pressure distribution-measuring device. The ischial region shifted forward or backward while maneuvering both the standard wheelchair and the electric wheelchair, and the shift rate of the ischial region was not significantly different between the standard wheelchair and the electric wheelchair. The ischial region shift occurred when the forward head moved by the video while maneuvering both a standard wheelchair and an electric wheelchair. Therefore, the shift might occurred because the pelvis shifted forward in conjunction with head movement during maneuvering of both the standard wheelchair and the electric wheelchair. This result showed that it is important to reduce head and trunk movements when maneuvering a wheelchair to reduce the shear force on the buttocks and prevent pressure injuries.

show abstract

Influence of rotational axis height of back support on horizontal force applied to buttocks in a reclining wheelchair

Cited by 4 publications

References 21 publications

Influence of Leg Support Elevation on Horizontal Force Acting on the Buttocks in a Reclining Wheelchair in Different Rotational Axis Positions of the Back Support

Influence of Leg Support Elevation on Horizontal Force Acting on the Buttocks in a Reclining Wheelchair in Different Rotational Axis Positions of the Back Support

Investigation of effect of leg support elevation timing on the horizontal force acting on the buttocks in a reclining wheelchair

The Shift of the Ischial Region during Maneuvering the Standard Wheelchair and the Electric Wheelchair in Healthy Adults

Contact Info

Product

Resources

About