| 摘要 |
An apparatus for controlling ultrafiltration in a dialysis system for artificial kidney including a dialyzer, a blood supply line for supplying a blood to the dialyzer, a blood discharge line for discharging the treated blood from the dialyzer, a liquid supply line for supplying a dialyzing liquid to the dialyzer, and a liquid discharge line for discharging the used dialyzing liquid from the dialyzer, and a negative pressure pump provided on the liquid discharge line, which comprises: a bypass line for connecting said liquid supply line directly to said liquid discharge line and having a first control valve means; a second control valve means disposed on said liquid discharge line in the upper stream of the junction of the liquid discharge line with the bypass line; an ultrafiltration measuring line connected at its both ends to said liquid discharge line interposing said second valve means therebetween and equipped with a measuring chamber; an air lead-in line having a third control valve means and a check valve means, with one end of said air lead-in line being connected to said ultrafiltration measuring line and the other end exposed to the atmosphere; and a liquid withdrawal control means comprising a pressure control circuit and a microcomputer, said control means electrically connecting to pressure gauges disposed at the blood inlet side and outlet side, respectively, of the dialyzer and pressure gauges disposed at the dialyzing liquid inlet side and outlet side.
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