| 摘要 |
The invention relates to an extracorporeal blood treatment device for operation with a single patient connection, which is connected by an arterial and a venous blood line to an extracorporeal blood circuit. The invention further relates to a method for operating a blood treatment device with a single patient connection. The blood treatment device in accordance with the invention has two apparatuses 6, 7 for conveying blood in the arterial and venous blood lines 8, 9. The second apparatus 8 for conveying blood comprises means 11 for collecting blood and means 20 for establishing a pressure in the means for collecting blood 8, so that blood collected in the means for collecting blood flows to the patient connection. Furthermore, the blood treatment device has arterial and venous closure elements 12A, 12B for interrupting the flow of liquid in the arterial and venous blood lines 8, 9, as well as a control unit 27 for actuating the two apparatuses 6, 7 for conveying blood and the arterial and venous closure elements 12A, 12B. The blood treatment device in accordance with the invention and the method in accordance with the invention are characterised in that the first apparatus 6 for conveying blood is operated both during the arterial and venous phases, so that blood flows continuously through the blood treatment unit 2. |
| 主权项 |
1. Extracorporeal blood treatment device for operation with a single patient connection, which is connected to an arterial and a venous blood line of an extracorporeal blood circuit,
wherein the blood treatment device comprises: a first apparatus (6) for conveying blood, a second apparatus (7) for conveying blood, which comprises means (11) for collecting blood that flows in the venous blood line (8) from a blood treatment unit (2) and means (20) for establishing a pressure in the means for collecting blood, so that blood collected in the means for collecting blood flows to the patient connection (10), an arterial closure element (12A) or interrupting the flow of liquid in the arterial blood line (8) and a venous closure element (12B) or interrupting the flow of liquid in the venous blood line (9), a control unit (27) for actuating the first and second apparatuses (6, 7) for conveying blood, as well as actuating the arterial and venous closure elements (12A, 12B), characterised in that the control unit (27) is configured so that the first apparatus (6) for conveying blood and the means (20) for establishing a pressure in the means (11) for collecting blood as well as the arterial and venous closure element (12A, 12B) are actuated so that in an arterial phase, the first apparatus (6) for conveying blood is operated with open arterial closure element (12A) and closed venous closure element (12B) at a predetermined first delivery rate, so that blood flows at a predetermined first flow rate (Q(1)a) from the patient connection (10) via the blood treatment unit (2) into the means (11) for collecting blood, and in a venous phase following the arterial phase, the first apparatus (6) for conveying blood is operated with open arterial and closed venous closure element (12A, 12B) at a predetermined second delivery rate, so that blood flows at a predetermined second flow rate (Q(1)v) from the patient connection (10) via the blood treatment unit (2) into the means (11) for collecting blood, and in the venous phase, pressure is established in the means (11) for collecting blood with the means (20) for establishing pressure, so that blood flows at a predetermined third flow rate from the means (11) for collecting blood to the patient connection (10), wherein there is continuous switching between the arterial and venous phases. |
