Blood purification apparatus

A blood purification apparatus comprising:

• a blood circuit and a dialysate circuit configured to bidirectionally circulate a fluid through a blood purification membrane of a blood purifier;
• and
• a controller,
• wherein the blood circuit and the dialysate circuit include:
• a first flow route that causes a dialysate to flow from the dialysate circuit into the blood circuit through a connection flow route that connects the dialysate circuit to the blood circuit while bypassing the blood purifier, and
• a second flow route that causes the dialysate to flow from the dialysate circuit into the blood circuit through the blood purification membrane,
• wherein the blood circuit comprises a first pump,
• wherein the dialysate circuit is attached to an air introducer that comprises a second pump and a first valve,
• wherein the connection flow route comprises a second valve,
• wherein the controller is configured to:
• perform control such that the first valve closes, the second valve opens, the first pump performs a first rotation, the second pump stops a second rotation, and blood in the blood circuit is returned to a body by feeding the dialysate to one of the first flow route and the second flow route,
• determine whether or not a return flow amount of the blood reaches a predetermined blood return amount, and
• perform control such that the first valve opens, the second valve closes, the first pump stops the first rotation, the second pump performs the second rotation and the blood in the blood circuit is returned to the body by feeding the dialysate to an other one of the first flow route and the second flow route in response to determination that the blood return amount of the blood reaches the predetermined blood return amount.

A method to be executed by a blood purification apparatus provided with a blood circuit and a dialysate circuit configured to bidirectionally circulate a fluid through a blood purification membrane of a blood purifier, and a controller,

• the blood circuit and the dialysate circuit including a first flow route that causes a dialysate to flow from the dialysate circuit into the blood circuit through a connection flow route that connects the dialysate circuit to the blood circuit while bypassing the blood purifier, and a second flow route that causes the dialysate to flow from the dialysate circuit into the blood circuit through the blood purification membrane, and
• the blood circuit comprising a pump,
• the method comprising steps of:
• causing the controller to perform control such that the pump performs a rotation and blood in the blood circuit is returned to a body by feeding the dialysate to one of the first flow route and the second flow route;
• causing the controller to determine whether or not a flow amount of the dialysate reaches a predetermined flow amount;
• and
• causing the controller to perform control such that the pump stops the rotation and the blood in the blood circuit is returned to the body by feeding the dialysate to an other one of the first flow route and the second flow route in response to determination that the flow amount of the dialysate reaches the predetermined flow amount.

A method to be executed by a blood purification apparatus provided with a blood circuit and a dialysate circuit configured to bidirectionally circulate a fluid through a blood purification membrane of a blood purifier, and a controller,

• the blood circuit and the dialysate circuit including a first flow route that causes a dialysate to flow from the dialysate circuit into the blood circuit through a connection flow route that connects the dialysate circuit to the blood circuit while bypassing the blood purifier, and a second flow route that causes the dialysate to flow from the dialysate circuit into the blood circuit through the blood purification membrane, and
• the blood circuit comprising a pump,
• the method comprising steps of:
• causing the controller to perform control such that the pump performs a rotation and blood in the blood circuit is returned to a body by feeding the dialysate to one of the first flow route and the second flow route;
• causing the controller to determine whether or not a return flow amount of the blood reaches a predetermined blood return amount;
• and
• causing the controller to perform control such that the pump stops the rotation and the blood in the blood circuit is returned to the body by feeding the dialysate to an other one of the first flow route and the second flow route in response to determination that the blood return amount of the blood reaches the predetermined blood return amount.