Biomedical Engineering Reference
In-Depth Information
Fig. 7.5 Interaction of the three bedding systems BS (top), PS (center) and 3CS (bottom) with
the body model BoMo4
below that median and percentile 95 represents the size ''large'', where 5 % of the
values are above that limit (Deutsches Institut für Normung 2006).
7.1.3 Selection of Appropriate Bedding Systems
7.1.3.1 Variation of the Membrane Inside Pressure
Body-support interaction simulations comprising the systems BS, PS and 3CS with
different foam materials (F0.5; F0.25; F0.75) at varying internal pressure (over
pressure) in the range of 2.8 and 3.5 mbar are presented. Figure
7.5
exemplarily
depicts the three systems with BoMo4 at steady state.
7.1.3.2 Mechanical Stress Analysis
To quantitatively compare mechanical (internal) tissue stress of the interaction
scenarios depicted in Fig.
7.5
, two paths (via nodes) where stress was evaluated
were defined. Path 1 begins at skin level and progresses through the tissue to the
