P Hiltmann

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describes the steady-state oxygen diffusion in a spherical cell with MichaelisMenten oxygen uptake kinetics (Lin, 1976; McElwain, 1978). Throughout the paper, primes denote differentiation with respect to r. A l l quantities in (1) and (2) are dimensionless, where the normalized variables C and r represent the oxygen tension and the radial distance. The(More)
Limitations of current centrifugal blood pumps are related to heat generation of bearings and leakage of seals, to dead water zones, and to poor efficiency. A new concept is proposed in this paper to ameliorate these problems based on a miniaturized magnetic drive, and a prototype is introduced. The pump rotor is suspended and driven by a radial permanent(More)
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