Blood treatment machine

A blood treatment machine to further increase the functional reliability of blood purifying machines having a blood treatment component, including a blood line for transport of blood between a patient and the blood treatment component, several control units for monitoring and controlling the blood transport and/or the blood treatment, and at least two control units each comprising an action computer and an auxiliary computer. The action computers are interconnected via an action bus, and the auxiliary computers are interconnected via an auxiliary bus. A table is stored wherein error cases occurring on the respective control unit and/or error messages received by the respective control unit are assigned to an error processing routine, and the action computer and/or the auxiliary computer of a control unit places an error message on the respective bus as soon as an error occurs on the respective control unit.

BRIEF SUMMARY OF THE DRAWINGS

Additional details and advantages of this invention are explained in greater detail on the basis of an embodiment in the form of a dialysis machine shown in the drawings. In the drawings:

FIG.

1: is a schematic diagram showing the components of a dialysis machine; and

FIG.

2: is a block diagram of the control units for the dialysis machine according to FIG.

1.

1. A blood treatment machine comprising:

2. The blood treatment machine according to claim 1, further comprising a measuring element and a controlling element connected to at least one of the action computer and the auxiliary computer.

3. The blood treatment machine according to claim 2, wherein the action computer and the auxiliary computer of one of the at least two control units are connected in parallel to the measuring element and to the controlling element.

4. The blood treatment machine according to claim 3, further comprising an alarm capable of being triggered when sensing or computation of a selected parameter carried out by the action computer and the auxiliary computer are different.

5. The blood treatment machine according to claim 4, wherein the error processing routine is adapted to cause a control unit to independently place controlling elements in a condition adapted to safeguard blood processing from the errors.

6. The blood treatment machine according to claim 5, wherein the blood treatment machine is a dialysis machine, and the appropriate control units are an operating unit, a hydraulic unit and a function unit.

7. The blood treatment machine according to claim 6, further comprising a display screen and a keyboard connected to the action computer of the operating unit, and a status display and an external interface connected to the auxiliary computer of the operating unit.

8. The blood treatment machine according to claim 6, wherein the hydraulic unit further comprises a dialysis fluid processing device, a balancing unit and an ultrafiltration device.

9. The blood treatment machine according to claim 6, further comprising an optical detector, an arterial pressure sensor, a venous pressure sensor, an air detector, a blood pump, a heparin pump and a venous clamp connected to the function unit.