Nikkiso Company Limited

Yuki Eda

Tomohiro Furuhashi

Hideto Maki

Masaaki Ohta

Ferenc Kazinczi

Kenji Furuhashi

Shinya Hasegawa

Kazuhide Ono

A blood purification device includes a blood circuit for extracorporeally circulating blood of a patient; a liquid supply circuit for supplying a supply liquid to the blood circuit or to a blood purifier provided on the blood circuit and a warmer provided on the liquid supply circuit to warm the supply liquid. The warmer is configured to sandwich and hold a warming circuit constituting a part of the liquid supply circuit. The warmer includes a heater provided on a sandwiching-and-holding surface sandwiching and holding the warming circuit. The warmer includes a heater temperature detection unit capable of detecting temperature of the heater. The warmer includes a temperature sensor for liquid temperature detection being capable of detecting temperature of the supply liquid flowing through the warming circuit and being provided on the sandwiching-and-holding surface at a position at which the temperature sensor for liquid temperature detection is separated from the heater and, when sandwiching and holding the warming circuit, comes into contact with the warming circuit on the downstream side of a portion warmed by the heater in a direction of sending liquid.

Blood purification device

A blood purification device includes a blood circuit for extracorporeally circulating blood of a patient: a blood purifier provided on the blood circuit; a gas-liquid separator being provided on the blood circuit on the downstream side of the blood purifier on a blood flow and separating air bubbles contained in inflowing blood: and a liquid level adjustment unit capable of adjusting a liquid level height in the gas-liquid separator. The liquid level adjustment unit performs control so that the liquid level height during priming is higher than the liquid level height during treatment.

A blood purification apparatus capable of performing pre-substitution and post-substitution simultaneously is provided. A patient's blood flows through an arterial blood circuit and reaches a dialyzer. The blood purified by the dialyzer flows through a venous blood circuit and returns into the patient. A first substitution pump delivers substitution fluid through a substitution line to a branching point. A pre-substitution line connects the branching point and the arterial blood circuit to each other and is provided with a second substitution pump at a halfway position thereof. A post-substitution line connects the branching point and the venous blood circuit to each other and is provided with a check valve at a halfway position thereof. When the two pumps are activated simultaneously, the substitution fluid is supplied to the arterial blood circuit (pre-substitution). When only the first substitution pump is activated, the substitution fluid is supplied to the venous blood circuit (post-substitution). When the flow rate of the second substitution pump is set higher than the flow rate of the first substitution pump, pre-substitution and post-substitution are performed simultaneously.

Blood purification apparatus

A blood purification apparatus includes: a peristaltic pump that includes a stator to which a pump tube including a first portion and a second portion is detachably attached, and a rotor including a roller and a guide portion, the roller delivering liquid by squeezing the pump tube, the guide portion retaining the pump tube so that the pump tube is squeezable with the roller about a predetermined axis; an anchor member that anchors an attaching member to which the pump tube is attached; and a displacing portion that displaces the attaching member between a set position and an unset position by moving the anchor member with the attaching member being anchored by the anchor member.

Blood purification apparatus using peristaltic pumps to circulate a liquid for blood treatment

A blood purification apparatus that includes a blood circuit including an arterial blood circuit and a venous blood circuit and that allows a patient's blood to extracorporeally circulate, with a blood purifier that is interposed between the arterial blood circuit and the venous blood circuit and purifies; a dialysate temporary chamber that temporarily stores dialysate received from a dialysate storage supported by a supporting unit; a substitution-fluid temporary chamber that temporarily stores substitution fluid received from a substitution-fluid storage supported by the supporting unit; a first dialysate introduction line through which the dialysate in the dialysate storage flows into the dialysate temporary chamber; and a substitution line through which the substitution fluid in the substitution-fluid storage flows into the substitution-fluid temporary chamber. The blood purification apparatus includes a dialysate transfer pump provided to the first dialysate introduction line and that transfers the dialysate in the dialysate storage to the dialysate temporary chamber, a substitution-fluid transfer pump provided to the substitution line and that transfers the substitution fluid in the substitution-fluid storage to the substitution-fluid temporary chamber, and a control unit that controls the dialysate transfer pump and the substitution-fluid transfer pump.

An adjusting device for a pressure detector that is capable of arbitrarily adjusting the initial position of a membrane member is provided. An adjusting device for a pressure detector includes a control unit that sequentially executes a first step in which a predetermined adjusting pressure is generated in a first zone by activating a pump with the first zone being closed by the closing of an electromagnetic valve, and a second step in which a gas-phase portion, the first zone, and a second zone are combined into a closed space by disabling the closing of the electromagnetic valve; and an adjusting-pressure-acquiring unit that acquires the adjusting pressure to be generated in the first step, the adjusting pressure being acquired in accordance with a relationship between a pressure and a capacity of the first zone in the first step and a pressure and a capacity of the combination of the gas-phase portion, the first zone, and the second zone in the second step. The control unit brings the membrane member to a position corresponding to the adjusting pressure by executing the second step after activating the pump in the first step in such a manner as to generate the adjusting pressure acquired by the adjusting-pressure-acquiring unit.

Growing community of inventors

Shizuoka, Japan

Yuki Eda