Rigorous Modeling and Analysis of Interoperable Medical Devices

Author(s):  
Jürgen Schönherr ◽  
Jörg Müglitz

Abstract The paper deals with synthesis, modeling and analysis of mechanisms with flexural pivots preferably used in micro-systems, measuring devices, or medical devices. Among other things, it will be shown that rotary joints can be replaced by flexural pivots so that the kinematic performance will be kept. Already in the phase of kinematic design, one has pay attention to material properties, load, and strain to ensure both the mobility and the strength of the mechanism. Using two examples, a Robert’s straight line generator and a trunk-like motion generating mechanism, it is shown here, how a relatively simple multi-body model can be used effectively for mechanism analysis and optimization.


Author(s):  
Delma P. Thomas ◽  
Dianne E. Godar

Ultraviolet radiation (UVR) from all three waveband regions of the UV spectrum, UVA (320-400 nm), UVB (290-320 nm), and UVC (200-290 nm), can be emitted by some medical devices and consumer products. Sunlamps can expose the blood to a considerable amount of UVR, particularly UVA and/or UVB. The percent transmission of each waveband through the epidermis to the dermis, which contains blood, increases in the order of increasing wavelength: UVC (10%) < UVB (20%) < UVA (30%). To investigate the effects of UVR on white blood cells, we chose transmission electron microscopy to examine the ultrastructure changes in L5178Y-R murine lymphoma cells.


Author(s):  
B.D. Tall ◽  
K.S. George ◽  
R. T. Gray ◽  
H.N. Williams

Studies of bacterial behavior in many environments have shown that most organisms attach to surfaces, forming communities of microcolonies called biofilms. In contaminated medical devices, biofilms may serve both as reservoirs and as inocula for the initiation of infections. Recently, there has been much concern about the potential of dental units to transmit infections. Because the mechanisms of biofilm formation are ill-defined, we investigated the behavior and formation of a biofilm associated with tubing leading to the water syringe of a dental unit over a period of 1 month.


1981 ◽  
Vol 64 (10) ◽  
pp. 18-27
Author(s):  
Yoshio Hamamatsu ◽  
Katsuhiro Nakada ◽  
Ikuo Kaji ◽  
Osamu Doi

Sign in / Sign up

Export Citation Format

Share Document