Computer simulation of interaction between pressures inside the body with a mattress...9th World Conference of the International Society for Gerontechnology (ISG), June 18-21, 2014, Taipei, Taiwan.
Purpose Bedsore prevention is a key aspect of the treatment of paralysis. We developed two devices, a bedsore preventative mattress and a wheel chair cushion1. Throughout the process of development, numerous body pressure measurements were calculated using different mattresses and cushions. Obtainin...
| Publicado en: | Gerontechnology Vol. 13; no. 2; pp. 218 - 219 |
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| Autores principales: | , , |
| Formato: | abstract diagnostic images proceedings research Journal Article |
| Publicado: |
International Society for Gerontechnology
2014 Special Issue
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=180444854&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 180444854 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15691101 904R jtl: Gerontechnology issn: 15691101 maglogo: N pubinfo: dt: 2014 Special Issue vid: 13 iid: 2 pid: 54298 pub: International Society for Gerontechnology artinfo: ui: 180444854 180444854 180444854 10.4017/gt.2014.13.02.177.00 180444854 ppf: 218 ppct: 1 formats: tig: atl: Computer simulation of interaction between pressures inside the body with a mattress...9th World Conference of the International Society for Gerontechnology (ISG), June 18-21, 2014, Taipei, Taiwan. aug: au: ISHIHARA, S. ISHIHARA, K. NAGAMACHI, M. sug: subj: Computer Simulation Methods Pressure Ulcer Prevention and Control Paralysis Therapy Beds and Mattresses Human Body Congresses and Conferences Taiwan Taiwan ab: Purpose Bedsore prevention is a key aspect of the treatment of paralysis. We developed two devices, a bedsore preventative mattress and a wheel chair cushion1. Throughout the process of development, numerous body pressure measurements were calculated using different mattresses and cushions. Obtaining such measurements is labor intensive. Thus, numerical simulation of body pressure can be useful in estimating the distribution of pressure that is caused by physical parameters of different mattresses. In this paper, we provide examples of methods used to model the pressures created by a body in a transverse plane. Method This analysis was based on the mean sizes of Japanese people found in the AIST database2. In this simulation, we used the width of iliac crest, abdominal depth, shoulder breadth and the diameter at the base of the arm. The average size of a Japanese male's shoulder was assigned for the use in the shoulder model; a shoulder breadth and arm joint diameter of 45.62cm and 12.63cm, respectively, were used for this study. FEM modeling and computations were done with ANSYS 12 (ANSYS Inc.). We referred anatomical and MRI images from The Visible Human Project3, for making the shapes of cross-sections of the body. Parameters of human tissues are referenced from Linder-Ganz & Gefen4. We used Ogden's formulation for hyperelastic materials stress and strain model. Results & Discussion Measurements from a simulated 60kg male body were used for the simulation. A commercially produced high-density urethane mattress was used (YM: Young's Modulus 25kPa, Poisson's ratio 0.0, density 48kg/m3). Estimated maximum pressure on the skin touching the mattress was 2.53kPa and 3.83kPa for subcutaneous fat. The mean value of measured pressure at the corresponding region was 1.32kPa with 63kg 158cm male. The corresponding simulation result was 1.12kPa. The difference was as small as 0.2kPa. The softer mattress (YM 3.81kPa) simulation shows a larger deformation and pressure diffusion; the computation with this mattress was based on a non-linear finite element method of hyperelastic materials such as muscle, skin and fat. Because it simulates different tissues, we could estimate the pressure not only on the surface, but also the pressure inside the trunk. The simulated results reflected the actual results of pressure measurements very well. pubtype: Academic Journal doctype: abstract diagnostic images proceedings research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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