Continuous blood purification apparatus

Abstract

The purpose of the present invention is to provide a continuous blood purification apparatus that can stop the substitution fluid pump, at least at the stage when the blood return chamber is filled with the substitution fluid, when the channel from the substitution fluid tank to the substitution fluid clamp is closed during operation of the substitution fluid pump. This continuous blood purification apparatus is provided with an extracorporeal blood circulation circuit (10), a dialysate channel (20), a substitution fluid channel (30), a waste fluid channel (40), a volume measurement means, and a control unit. The substitution fluid tank (31), the substitution fluid clamp (32) and the substitution fluid pump (33) are disposed in the substitution fluid channel (30). A substitution fluid branch channel (35), wherein are disposed a substitution fluid measuring solenoid valve (36), an upper substitution fluid level sensor (37), a substitution fluid measurement vessel (38) and a lower substitution fluid level sensor (39), is connected to the substitution fluid channel (30) between the substitution fluid clamp (32) and the substitution fluid pump (33). The control unit outputs a warning signal and a pump stop signal when a situation in which the substitution fluid level is positioned below the lower substitution fluid level sensor (39) continues for a certain time during the operation of the substitution fluid pump (33).

Description

technical field [0001] The present invention relates to a device for continuous blood purification for implementing long-term hemodiafiltration therapy. Background technique [0002] From the viewpoint of preventing sudden changes in the patient's body fluid balance, hemodiafiltration therapy using hemodialysis and hemofiltration is performed for a relatively long period of time (for example, 24 hours or more). [0003] In the continuous blood purification apparatus for carrying out the above-mentioned hemodiafiltration therapy, it is extremely important to manage the flow rates of dialysate, replacement fluid, and waste fluid. Therefore, it is necessary to measure the respective flow rates over time, and when there is a difference from the respective set flow rates, correct the rotation speed of the liquid-feeding pump, etc., and control the flow rates so as to match the above-mentioned set flow rates. [0004] Conventionally, a continuous blood purification device includi...

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Problems solved by technology

[0023] However, when the liquid replacement pump 83 is stopped based on the detection signal from the air bubble detection sensor 94 (when the blood return chamber 93 is in an empty state), it is necessary to fill the blood return chamber 93 with replacement fluid, and to replace the liquid replacement flow path. Perform cumbersome operations such as exhaust within 80, and it takes a certain amount of time until the dialysis treatment is restarted

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