Abstract: An apparatus for blood dialysis composed at least of a hemodialyzer (a) whereby blood is brought into contact with a dialysate via a semipermeable membrane and thus purified; a blood circulation system (b) composed of a blood circuit in the arterial side whereby blood is taken out from a patient and flown into the hemodialyzer and another blood circuit in the venous side whereby the blood flown out from the hemodialyzer is returned to the patient; a dialysate supplying/discharging system (c) for supplying and discharging the dialysate composed of a dialysate-supply line for supplying the dialysate to the hemodialyzer and a dialysate-discharge line for discharging the dialysate flown out from the hemodialyzer, and a means (d) of controlling the back-filtration speed. Owing to this constitution, individual steps from the preparation of the dialysis (treatment) to the completion of the treatment and the change from a specific step to the next step can be safely, surely and quickly carried out in most cases.

Abstract: An automatic dialyzer for purifying blood brought into contact with a dialysate via a semi-impermeable membrane. The dialyzer includes at least a blood circulating system and a dialysate supply/discharge system, wherein the blood line of the blood circulating system is connected to an overflow line having a reversibly-rotatable blood pump, a blood chamber, and an open/close device for overflowing of liquid from the blood chamber to the outside of the blood line. Liquid supply means is provided to a first bypass line and/or a second bypass line for supplying liquid in both forward and reverse directions to enable regulation of the supply amount of the dialysate for water removing/liquid replenishing. The supply speed of the liquid supply device and the supply speed of the blood pump are regulatable in conjunction with each other. Also provided is a dialyzing method using the automatic dialyzer.

Abstract: An apparatus for blood dialysis composed at least of a hemodialyzer (a) whereby blood is brought into contact with a dialysate via a semipermeable membrane and thus purified; a blood circulation system (b) composed of a blood circuit in the arterial side whereby blood is taken out from a patient and flown into the hemodialyzer and another blood circuit in the venous side whereby the blood flown out from the hemodialyzer is returned to the patient; a dialysate supplying/discharging system (c) for supplying and discharging the dialysate composed of a dialysate-supply line for supplying the dialysate to the hemodialyzer and a dialysate-discharge line for discharging the dialysate flown out from the hemodialyzer, and a means (d) of controlling the back-filtration speed. Owing to this constitution, individual steps from the preparation of the dialysis (treatment) to the completion of the treatment and the change from a specific step to the next step can be safely, surely and quickly carried out in most cases.

Abstract: An automatic dialyzer for purifying blood brought into contact with a dialysate via a semi-impermeable membrane, comprising at least a blood circulating system and a dialysate supply/discharge system, characterized in that the blood line of the blood circulating system is connected to an overflow line having a reversibly-rotatable blood pump and also having a blood chamber and an open/close means for overflowing of liquid from the blood chamber to the outside of the blood line, and liquid supply means, for supplying liquid in both forward and reverse directions and being able to regulate the supply amount of the dialysate for water removing/liquid replenishing, are provided to a first bypass line and/or a second bypass line, the supply speed of the liquid supply means and the supply speed of the blood pump being regulatable in conjunction with each other; and a dialyzing method using the automatic dialyzer.