DISPOSABLE AND DEVICE FOR EXTRACORPOREAL BLOOD TREATMENT, AND METHOD FOR CHECKING A CORRECT LINE ATTACHMENT

The invention relates to a disposable for extracorporeal blood treatment, which disposable comprises a blood admission line, a separator, a blood return line and a plasma line, wherein the disposable comprises at least two interfaces for the addition of citrate, wherein a first interface is arranged in the blood admission line and a second interface is arranged in the plasma line. The invention further relates to a device for carrying out extracorporeal blood treatment, which device has a disposable according to the invention and a citrate source, the latter being coupled to the first interface or to the second interface. The invention further relates to a method for checking the correct attachment of a citrate source to a liquid-conveying line of a device for carrying out blood treatment, wherein an overpressure is generated in the area of the attachment by way of a pump arranged in the citrate source, the increase and/or subsequent decrease of this pressure is detected and, on the basis of the detected pressure increase or pressure decrease, and following a routine stored in the device, a conclusion is drawn concerning the correct attachment of the citrate source.