Ghezzi P, Cavalli P L, Palanca R
Minerva Med. 1977 May 9;68(23):1573-8.
Ultrafiltration in recirculating coil dialysers is discussed. The difficulty of determining the exact transmembrane pressure is stressed. The data normally available are insufficient and take no account of the direction of recirculation, which may be a determining factor. Input and output dialysing fluid pressure were measured in vitro and the respective ultrafiltration values were compared with those observed clinically. Calculation of the mean blood pressure in the dialyser circuit is examined. If determined from the simple arithmetical mean between the input and output pressure, this does not reflect the real situation inside the filter. It is thus unreliable when used to calculate the real transmembrane pressure, and hence the ultrafiltration.
本文讨论了循环盘管透析器中的超滤。强调了确定确切跨膜压力的困难。通常可获得的数据不足，且未考虑再循环方向，而再循环方向可能是一个决定性因素。在体外测量了透析液的输入和输出压力，并将各自的超滤值与临床观察值进行了比较。研究了透析器回路中平均血压的计算方法。如果根据输入和输出压力的简单算术平均值来确定，这并不能反映过滤器内部的实际情况。因此，用于计算实际跨膜压力以及超滤量时是不可靠的。
