Method and device for checking the correct coupling of a supply device to a therapy device

• US 8,394,046 B2
• Filed: 05/13/2008
• Issued: 03/12/2013
• Est. Priority Date: 05/25/2007
• Status: Active Grant

• Current Assignee: Fresenius Medical Care Deutschland GmbH (Fresenius Medical Care AG)
• Original Assignee: Fresenius Medical Care Deutschland GmbH (Fresenius Medical Care AG)
• Inventors: Nuernberger, Thomas, Kloeffel, Peter, Blasek, Marco
• Primary Examiner(s): DRODGE, JOSEPH W
• Application Number:
  US12/451,565
• Publication Number:
  US 20100130905A1
• Time in Patent Office: 1,764 Days
• Field of Search: 73/405.R, 73/46, 73/498, 738/659, 210/90, 210/97, 210/143, 210/258, 210/321.6, 210/321.71, 210645-647, 210/739, 285/15, 285/93, 285/425, 604/4.01, 604/5.01, 604/6.09, 604/19, 604/27, 604/28, 604/30, 604 65- 67, 604/151
• US Class Current: 604/5.01
• CPC Class Codes: A61M 1/3672 Means preventing coagulation
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/16859 Evaluation of pressure response, e.g. to an applied pulse

Abstract

A method provides for checking the correct coupling of an adding device to a therapeutic appliance that includes an extracorporeal circuit with which the adding device is connected such that a drug can be introduced into the extracorporeal circuit by the adding device during operation of the therapeutic appliance. The adding device is coupled to the extracorporeal circuit on the suction side of a pump disposed in the extracorporeal circuit, with a portion in the region of negative pressure of the extracorporeal circuit being in connection with a portion of the adding device that is closed with respect to the other parts of the extracorporeal circuit, and with the pressure in the closed portion being varied and measured.

Claims

1. A method of checking a correct coupling of an adding device to a therapeutic appliance that includes an extracorporeal circuit with which the adding device is coupled such that a drug can be introduced into the extracorporeal circuit with the adding device, said method comprising:

closing a portion of the extracorporeal circuit in connection with a portion of the adding device with respect to other parts of the extracorporeal circuit, and varying and measuring a pressure in the closed portion, with the closed portion being a portion of an arterial conduit of a set of blood tubes for a method of extracorporeal blood treatment.

2. The method as claimed in claim 1, wherein a predetermined sequence of pressure conditions in a region of negative and excess pressure is applied and measured, and wherein a measured pressure profile is compared with a set-point profile.

3. The method as claimed in claim 1, wherein the adding device is a syringe pump with a syringe inserted therein.

4. The method as claimed in claim 3, wherein the drug contained in the syringe pump is an anticoagulant or another medicament.

5. The method as claimed in claim 4, wherein the anticoagulant is heparin.

6. The method as claimed in claim 1, wherein the portion of the extracorporeal circuit in connection with the portion of the adding device includes an occluding pump.

7. The method as claimed in claim 6, wherein the pump is a roller pump or a finger pump.

8. The method according to claim 6, wherein the occluding pump is a peristaltic pump.

9. The method as claimed in claim 1, wherein the pressure is measured via a pressure sensor connected with the extracorporeal circuit.

10. The method as claimed in claim 1, wherein the adding device is a syringe pump, wherein the portion of the extracorporeal circuit in connection with the portion of the adding device includes an occluding blood pump, and wherein tube portions of the arterial conduit of the set of blood tubes are subjected to different pressure conditions after closing via a clamp and via the syringe pump and the occluding blood pump.

11. The method as claimed in claim 10, wherein a torque of a motor for driving at least one of the syringe pump and the peristaltic pump is detected via a motor current and specified as a set point or set-point profile.

12. The method as claimed in claim 1, wherein the adding device is a syringe pump and the portion of the extracorporeal circuit in connection with the portion of the adding device includes a peristaltic pump, and wherein changes in the pressure are effected by specifying at least one of a translational movement of a piston of the syringe pump and an angle of rotation of the peristaltic pump, and wherein the changes in the pressure specified by the at least one of the translation and the angle of rotation are compared with a set-point profile or a set point.

13. The method as claimed in claim 12, wherein the set points or set-point profiles for the pressures are specified, and the required translational movements of the at least one of the piston of the syringe pump and the angles of rotation of the peristaltic pump are measured and compared with the specified set points or set-point profiles of the at least one of the translational movement and the angle of rotation.

14. The method as claimed in claim 1, wherein process sequences are controlled by a control device.

15. The method as claimed in claim 14, wherein the control device is integrated in the control of a blood treatment machine.

16. A therapeutic appliance configured for accommodating an extracorporeal circuit with an adding device for a drug, said appliance comprising:

a control device that automatically checks the correct coupling of the adding device by the method according to claim 1.

17. The therapeutic appliance as claimed in claim 16, wherein the adding device is a syringe pump with a syringe inserted therein.

18. The therapeutic appliance as claimed in claim 17, wherein via a tubular conduit the syringe pump is connected to a tubular conduit of the therapeutic appliance in a region of negative pressure on a suction side of a pump.

19. The therapeutic appliance as claimed in claim 17, wherein the syringe is filled with a concentrate or a solution.

20. The therapeutic appliance as claimed in claim 16, wherein the drug is an anticoagulant or another medicament.

21. The therapeutic appliance as claimed in claim 20, wherein the anticoagulant is heparin.

22. The therapeutic appliance as claimed in claim 16, wherein the tubular conduit of the therapeutic appliance is the portion of the arterial conduit of the set of blood tubes for the method of extracorporeal blood treatment.

23. The therapeutic appliance as claimed in claim 16, wherein the method is at least one of dialysis, hemodialysis, hemofiltration, hemodiafiltration, blood purification by adsorption, transfusion, and autotransfusion.

24. The therapeutic appliance according to claim 16, wherein the appliance is a dialysis machine.