Method and apparatuses for preparing an extracorporeal blood circuit for the treatment of blood

Patent metadata

Field	Value
Publication number	US-10646635-B2
Application number	US-201515513187-A
Country	US
Kind code	B2
Filing date	Sep 22, 2015
Priority date	Sep 23, 2014
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

The present disclosure concerns a method for preparing an extracorporeal blood circuit for its use in a blood treatment of a patient, which treatment is carried out using a blood treatment apparatus and using a blood treatment device, which comprises a blood chamber and a dialysate chamber partitioned off therefrom by a membrane, The method comprising: filling the extracorporeal blood circuit using a priming solution, wherein the priming solution comprises citrate, or filling of the extracorporeal blood circuit using a priming solution and using a citrate solution. The invention further comprises devices suitable for carrying out the method.

First claim

The invention claimed is:

1. A method of preparing an extracorporeal blood circuit for use in a blood treatment of a patient, which treatment is carried out using a blood treatment apparatus and using a blood treatment device, which comprises a blood chamber and a dialysate chamber partitioned off therefrom by a membrane, the method comprising:
filling the extracorporeal blood circuit with a first priming solution, wherein the first priming solution comprises citrate, or filling the extracorporeal blood circuit with a second priming solution and a citrate solution; and
filling the extracorporeal blood circuit with a fluid comprising or consisting of blood while no dialysis fluid flows through the dialysate chamber of the blood treatment device.

2. The method according to claim 1 , wherein the first priming solution or the second priming solution and the citrate solution, with which the extracorporeal blood circuit is filled, comprises a maximum of 0.5 mmol/L calcium.

3. The method according to claim 1 , wherein the first priming solution or the second priming solution and the citrate solution, with which the extracorporeal blood circuit is filled, possesses a pH of at least 7.3.

4. The method according to claim 1 , comprising:
establishing a fluid connection between an arterial conduit section of the extracorporeal blood circuit and a source of citrate solution.

5. The method according to claim 1 , comprising:
conveying the fluid within the extracorporeal blood circuit using a blood pump at a first conveying speed; and
simultaneously conveying citrate from a source of citrate solution into the extracorporeal blood circuit using a second conveying apparatus at a second conveying speed;
wherein the second conveying speed is in an adjusted or predetermined ratio to the first conveying speed.

6. The method according to claim 5 , wherein the fluid is conveyed within the extracorporeal blood circuit using the blood pump at least for a certain time period until a layer of protein is deposited on one or several surfaces of the extracorporeal blood circuit.

7. The method according to claim 5 , wherein the fluid is conveyed within the extracorporeal blood circuit using the blood pump at most for a time period, which does not necessitate a calcium infusion for the avoidance of a hypocalcemia.

8. The method according to claim 7 , where in the time period is between 10 and 15 minutes.

9. The method according to claim 5 , further comprising readjusting the ratio of the second conveying speed to the first conveying speed.

10. The method according to claim 1 , comprising:
determining a maximum amount of citrate, which is used or administered, considering individual data of the patient, the individual data comprising a measurement of extracellular body water volume of the patient.

11. A control or regulating unit suitable and provisioned, designed, configured, or programmed for carrying out a method comprising:
preparing an extracorporeal blood circuit for use in a blood treatment of a patient, which treatment is carried out using a blood treatment apparatus and using a blood treatment device, which comprises a blood chamber and a dialysate chamber partitioned off therefrom by a membrane;
filling the extracorporeal blood circuit with a first priming solution, wherein the first priming solution comprises citrate, or filling the extracorporeal blood circuit with a second priming solution and a citrate solution; and
filling the extracorporeal blood circuit with a fluid comprising or consisting of blood while no dialysis fluid flows through the dialysate chamber of the blood treatment device.

12. The control or regulating unit according to claim 11 , additionally programmed to carry out a blood treatment together with the blood treatment apparatus, wherein during the blood treatment, at least one of heparin and calcium is not added to the blood guided in the extracorporeal blood circuit.

13. A blood treatment apparatus, comprising a control or regulating unit, which is programmed to carry out a method comprising:
preparing an extracorporeal blood circuit for use in a blood treatment of a patient, which treatment is carried out using a blood treatment apparatus and using a blood treatment device, which comprises a blood chamber and a dialysate chamber partitioned off therefrom by a membrane;
filling the extracorporeal blood circuit with a first priming solution, wherein the first priming solution comprises citrate, or filling the extracorporeal blood circuit with a second priming solution and a citrate solution; and
filling the extracorporeal blood circuit with a fluid comprising or consisting of blood while no dialysis fluid flows through the dialysate chamber of the blood treatment device.

14. The blood treatment apparatus according to claim 13 , wherein the blood treatment apparatus is a hemodialysis device, a hemofiltration device or a hemodiafiltration device.

15. A digital storage medium, in particular in the form of a disk, with electrically readable control signals, configured for interacting with a programmable computer system such that the mechanical steps of the method according to claim 1 is prompted.

16. A computer program product with a program code saved on a machine-readable medium for prompting the mechanical steps of the method according to claim 1 , when the computer program product runs on a computer.

Assignees

• Fresenius Medical Care Deutschland Gmbh

Inventors

• Pohlmeier Robert
• Wehmeyer Wofgang

Classifications

• A61M2205/50

  with microprocessors or computers · CPC title

• A61M1/3672

  Means preventing coagulation · CPC title

• A61M1/3643

  Priming, rinsing before or after use · CPC title

• A61M1/3644

  Mode of operation · CPC title

• A61M2202/0445

  Proteins · CPC title