The evaluation of an intelligent closed loop dynamic sitting system to promote good posture, pressure relief and tissue perfusion
The evaluation of an intelligent closed loop dynamic sitting system to promote good posture, pressure relief and tissue perfusion
Aim: when sitting, buttocks and thighs are subjected to higher pressures, which if sustained can be a risk factor in pressure ulcer development. This study aimed at evaluating the biomechanical and physiological performance of a dynamic sitting system incorporating pressure sensitive air cells technology to provide pressure relief and maintaining skin health.
Materials and methods: thirteen participants were recruited and asked to adopt five static postures in a random order, each held for 10 min. Measurements at the chair-participant interface included interface pressure, internal pressure of the chair air cells, transcutaneous tissue gas tensions at the ischial tuberosities, and accelerometer data collected from the sternum. Area under the Receiver Operating Characteristic curve was used to evaluate sensitivity and specificity of all parameters in detecting postural change events, examining the 1st spatial derivative.
Results: data revealed a high inter-subject variability, with interface pressure e.g. peak pressure gradient and contact area data showing statistically significant difference between postures. This was reflected in the physiological response with some individuals exhibiting low O2 levels and associated high CO2 (>25 % from baseline). Area under the curve values revealed interface pressure parameters and actimetry data accurate in detecting postural changes events (≥0.6).
Conclusion: the dynamic seating support depended on posture, although there remained some significant differences in interface pressure values and local tissue physiology. Further research is required to assess the impact of these sitting conditions in vulnerable individuals.
Actimetry, Dynamic sitting system, Interface pressure, Mobility, Posture
Caggiari, Silvia
58f49054-6ca6-429b-b499-49b93357e5ba
Hallgarth, Rosemary
9bfb5981-2230-45c9-b649-3e41d9ea41a3
Mooroogen, Krishna
892380a6-abcd-4020-bb42-ec5a6c615d71
Yu, Sheana
fffc85d2-57a1-4bf5-a8d7-941fc512e27a
Worsley, Peter R.
6d33aee3-ef43-468d-aef6-86d190de6756
May 2025
Caggiari, Silvia
58f49054-6ca6-429b-b499-49b93357e5ba
Hallgarth, Rosemary
9bfb5981-2230-45c9-b649-3e41d9ea41a3
Mooroogen, Krishna
892380a6-abcd-4020-bb42-ec5a6c615d71
Yu, Sheana
fffc85d2-57a1-4bf5-a8d7-941fc512e27a
Worsley, Peter R.
6d33aee3-ef43-468d-aef6-86d190de6756
Caggiari, Silvia, Hallgarth, Rosemary, Mooroogen, Krishna, Yu, Sheana and Worsley, Peter R.
(2025)
The evaluation of an intelligent closed loop dynamic sitting system to promote good posture, pressure relief and tissue perfusion.
Journal of Tissue Viability, 34 (2), [100867].
(doi:10.1016/j.jtv.2025.100867).
Abstract
Aim: when sitting, buttocks and thighs are subjected to higher pressures, which if sustained can be a risk factor in pressure ulcer development. This study aimed at evaluating the biomechanical and physiological performance of a dynamic sitting system incorporating pressure sensitive air cells technology to provide pressure relief and maintaining skin health.
Materials and methods: thirteen participants were recruited and asked to adopt five static postures in a random order, each held for 10 min. Measurements at the chair-participant interface included interface pressure, internal pressure of the chair air cells, transcutaneous tissue gas tensions at the ischial tuberosities, and accelerometer data collected from the sternum. Area under the Receiver Operating Characteristic curve was used to evaluate sensitivity and specificity of all parameters in detecting postural change events, examining the 1st spatial derivative.
Results: data revealed a high inter-subject variability, with interface pressure e.g. peak pressure gradient and contact area data showing statistically significant difference between postures. This was reflected in the physiological response with some individuals exhibiting low O2 levels and associated high CO2 (>25 % from baseline). Area under the curve values revealed interface pressure parameters and actimetry data accurate in detecting postural changes events (≥0.6).
Conclusion: the dynamic seating support depended on posture, although there remained some significant differences in interface pressure values and local tissue physiology. Further research is required to assess the impact of these sitting conditions in vulnerable individuals.
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Accepted/In Press date: 5 February 2025
e-pub ahead of print date: 6 February 2025
Published date: May 2025
Keywords:
Actimetry, Dynamic sitting system, Interface pressure, Mobility, Posture
Identifiers
Local EPrints ID: 499419
URI: http://eprints.soton.ac.uk/id/eprint/499419
ISSN: 0965-206X
PURE UUID: 5e44f734-a49a-4e79-9644-c533bc69e7b4
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Date deposited: 19 Mar 2025 17:43
Last modified: 20 Mar 2025 03:02
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Author:
Rosemary Hallgarth
Author:
Krishna Mooroogen
Author:
Sheana Yu
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