The evaluation of an intelligent closed loop dynamic sitting system to promote good posture, pressure relief and tissue perfusion
Year: 2025
Type: article
Abstract: 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. 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. 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 O 2 levels and associated high CO 2 (>25 % from baseline). Area under the curve values revealed interface pressure parameters and actimetry data accurate in detecting postural changes events (≥0.6). 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. • Interface pressure and actimetry devices can inform individual posture and mobility in sitting. • Movements between postures influenced the viability of the soft tissues. • Pressure sensitive air cell technology have the potential to provide postural support and proactive relief of pressure points. • Intelligent systems can support targeted interventions and self-management of posture, mobility and PU risk.
Source: Journal of Tissue Viability
Authors: Silvia Caggiari, Rosemary Hallgarth, Krishna Mooroogen, Sheana Yu, Peter R. Worsley
Institution: University of Southampton
Language: English
Subfield: Occupational Therapy
Field: Health Professions
Domain: Health Sciences
Open Access status: hybrid
Estimated APC paid: $2,790
OpenAlex ID: W4407204670