兔体外辅助循环模型的建立

用40只新西兰兔,在常温不停跳下,采用左心房插管引流,左股动脉灌注的方法,建立兔左心辅助体外循环动物模型,39只模型成功建立.术中血压、心率及体温等各项生理指标基本稳定,与开胸前柑比,各项指标变化均小于5%.     

Eccentric driving of a Rijlant's network (author's transl)]

As far as the central terminal does not interfere with the dipolar equivalent of the driving system, the zero isopotential line reaches the boundary of the network. Besides, if the emission level is at least five resistive layers "away" from the detection points, the proximity effects vanish. In these conditions the potential information available at the boundary becomes proper to be handled by the Gabor & Nelson's method. Calculating the location of the dipole leads to a fraction of the maximal "dimension" of the structure so that it directly expresses the eccentricity. The latter value may be compared with the corresponding one which is determined by the injection axis relative to the dodecahedral disposition of the connexions. From such quantitative comparisons, we conclude that an eccentricity simulating that of the heart in the thorax requires that the injection remains at least ten resistive layers "away" from the boundary if we want to view the generator through VCG leads which does not appreciably distort it.