Method to control a blood treatment apparatus and devices after the conclusion of treatment

1. A method for controlling a blood treatment apparatus, the blood treatment apparatus comprising (i) a blood pump for transporting blood in an extracorporeal blood tube set and (ii) a dialysis fluid pump for conveying dialysis fluid in a dialysis fluid circuit having a dialysis fluid supply tube which is adapted to be interrupted via a dialysis fluid supply tube clamp and a dialysis fluid drain tube which is adapted to be interrupted via a dialysis fluid drain tube clamp,

wherein the extracorporeal blood tube set (a) comprises an arterial section comprising or connected to at least one of an arterial needle or an arterial patient tube clamp, (b) comprises a venous section comprising or connected to at least one of a venous needle or a venous patient tube clamp, and (c) comprises or is connected to a blood filter arranged between the arterial section and the venous section, the blood filter comprising a membrane which separates a blood chamber from a dialysis fluid chamber, the method comprising:

(a) closing the arterial patient tube clamp and the venous patient tube clamp;

(b) conveying the dialysis fluid via the dialysis fluid pump;

(c) opening the venous patient tube clamp;

(d) closing the dialysis fluid drain tube;

(e) inhibiting or stopping a flow of the dialysis fluid, in particular, when a pre-defined or a predetermined first volume has passed through the membrane, wherein the pre-defined or the predetermined first volume is minus or less than a second volume, wherein the second volume corresponds to a volume of the arterial section up to an inlet of the blood filter;

(f) closing the venous patient tube clamp;

(g) conveying the dialysis fluid via the dialysis fluid pump;

(h) opening the arterial patient tube clamp while the dialysis fluid drain tube is closed;

(i) optionally reducing the flow rate via the dialysis fluid pump;

(j) closing the arterial patient tube clamp;

(k) stopping the dialysis fluid pump when the second volume has been delivered or air or clots have been detected via a sensor;

the method further comprising:

(A) (l) starting the dialysis fluid pump or an ultra-filtration pump located downstream of the blood filter;

(m) closing or holding or keeping closed the dialysis fluid supply tube;

(n) opening the dialysate fluid supply tube clamp;

(o) closing or holding or keeping closed the arterial and the venous patient tube clamps;

(p) opening a vent valve;

(q) sucking or aspirating dialysis fluid over the membrane and out of the extracorporeal blood tube set via the dialysis fluid pump;

(r) opening the dialysis fluid drain tube;

(s) introducing gas into a connecting line to a venous pressure sensor, which gas is configured to displace the dialysis fluid through the membrane into the dialysis fluid outlet side;

(t) optionally emptying a dry bicarbonate concentrate container;

(u) stopping the dialysis fluid pump;

(v) closing the arterial patient tube clamp and the venous patient tube clamp if the clamps are open; and

(w) outputting an alarm or indication that the method is finished; or

(B) (l) starting the dialysis fluid pump or an ultra-filtration pump located downstream of the blood filter;

(m) closing or holding or keeping closed the dialysis fluid supply tube;

(n) opening the dialysis fluid supply tube clamp;

(o) closing or holding or keeping closed the arterial and the venous patient tube clamps;

(p) opening a vent valve; and

(q) sucking or aspirating dialysis fluid over the membrane and out of the extracorporeal blood tube set via the dialysis fluid pump; or

(C) (r) opening the dialysis fluid drain tube; and

(s) introducing gas into a connecting line to a venous pressure sensor, which gas is configured to displace the dialysis fluid through the membrane into the dialysis fluid outlet side.

2. The method according to claim 1 , further comprising:

stopping the blood pump if a predetermined timing, duration of treatment, value of dialysis dose, or amount of ultra-filtration is reached.

3. The method according to claim 1 , further comprising:

ejecting a blood tube section of the extracorporeal blood tube set.

4. The method according to claim 1 , wherein the dialysis fluid rate is automatically adjusted in step (b).

5. The method according to claim 1 , further comprising at least one of:

separating at least one of a dialysate connector or an on-line connector or inhibiting, via at least one valve, a fluid communication between the connectors and hydraulics; or

disconnecting the container with dry bicarbonate concentrate from the hydraulics or preventing fluid communication between the container and the hydraulics.

6. The method according to claim 5 , wherein disinfection is continued and terminated after detecting that the dialysate tubes have been connected to the machine, the online connector is in the rinsing position and the container of dry bicarbonate concentrate has been removed.

7. The method according to claim 1 , further comprising:

calculating the pre-defined or the predetermined first volume to the ultra-filtration amount.