Recirculation device of an extracorporeal blood treatment apparatus

Patent metadata

Field	Value
Publication number	US-9636448-B2
Application number	US-201414784822-A
Country	US
Kind code	B2
Filing date	Apr 16, 2014
Priority date	Apr 19, 2013
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A recirculation device of an extracorporeal blood treatment device is disclosed with a preferably universal medical fluid container to which an arterial line section of a fluid conducting system of the extracorporeal blood treatment device can be connected as an option. Furthermore, the recirculation device has a 3-way switch, preferably a 3-way valve, which is arranged directly downstream of the universal medical fluid container. A conduit of the 3-way switch is preferably coupled with a spike or a similar connecting device or is formed in one piece together with it.

First claim

The invention claimed is:

1. Recirculation device of an extracorporeal blood treatment device with a medical fluid container to which an arterial line section of a fluid conducting system of the extracorporeal blood treatment device can be connected, the recirculation device comprising:
a 3-way switch positioned downstream of the medical fluid container, the 3-way switch including a first conduit, a second conduit, and a third conduit, wherein,
the first conduit is configured to fluidly connect to a fluid chamber of the medical fluid container,
the second conduit is configured to fluidly connect to the arterial line section, and
the third conduit is configured to fluidly connect to a venous line section of the fluid conducting system,

the 3-way switch includes at least three positions, wherein,
in a first switch position, the first conduit is fluidly connected with the second conduit for fluid flow in between and the third conduit is closed
in a second switch position, the second conduit is fluidly connected with the third conduit for fluid flow in between and the first conduit is closed, and
in a third switch position, the first, second, and third conduits are closed, and

the 3-way switch is configured to perform a filling process and a recirculation process, wherein,
for the filling process, the medical fluid container is coupled with the arterial line section by placing the 3-way switch in the first switch position, and
for the recirculating process, the arterial line section is connected with the venous line section by placing the 3-way switch in the second switch position, wherein the first conduit is closed such that the medical fluid container is fluidly uncoupled from the fluid conducting system of the extracorporeal blood treatment device.

2. Recirculation device according to claim 1 , wherein the first conduit is configured for fluid connection through a connection device or by having an integrated connection device.

3. Recirculation device according to claim 1 , wherein the 3-way switch is a 3-way valve including a rotary piston with a handle for manually activating the 3-way valve.

4. Recirculation device according to claim 1 , wherein, in the third switch position, the first, second, and third conduits are closed such that the arterial and venous line sections of the fluid conducting system are disconnected from the medical fluid container.

5. Recirculation device according to claim 1 , further comprising a spike connected to or integrally formed with the first conduit of the 3-way switch, the spike adapted for connection with the medical fluid container.

6. Recirculation device according to claim 5 , wherein the spike is directly connected to the first conduit transition-free without interposition of a bridging line section.

7. Recirculation device according to claim 1 , wherein the medical fluid container is a universal container with exclusively one fluid outlet or one single tapping point.

8. Extracorporeal blood treatment device with an internal fluid conducting system that has an arterial line section and a venous line section for connecting the fluid conducting system to a patient, comprising a recirculation device according claim 1 .

9. Use of a recirculation device according to claim 1 in a dialysis machine which has a patient-side fluid conducting system with the arterial line section and the venous line section that can be fluidly connected with the recirculation device to fill it.

10. Method for performing a filling and recirculation process of a blood-side conduit system of a dialysis machine using a recirculation device according to claim 1 , the method comprising the steps of:
a. connecting the first conduit to the medical fluid container with the first, second, and third conduits closed, and connecting the arterial line section to the second conduit with the venous fluid section open to the environment;
b. flushing a fluid flow path along the arterial fluid conduit section of the extracorporeal blood treatment device and the venous fluid conduit section by fluidly connecting the medical fluid container with the second conduit of the 3-way switch;
c. completely closing the 3-way switch and connecting of the venous fluid conduit section with the third conduit of the 3-way switch,
d. recirculating fluid in the fluid flow path by directly connecting the second and third conduits on the 3-way switch and simultaneously closing off the fluid source,
e. complete closing the 3-way switch and uncoupling the venous fluid conduit section from the third conduit and repeatedly flushing the fluid flow path according to step b., and
f. complete closing the 3-way switch in preparation for a subsequent connecting of the arterial and venous fluid conduit sections to a patient.

Assignees

• Braun Avitum Ag

Inventors

• Hector Rainer
• Hundertmark Charleen
• Hieronymi Judith
• Susca Michele
• Mihailescu Anne-Marie
• Freitag Claudia

Classifications

• F16K11/072

  with pivoted closure members · CPC title

• A61M1/3647 Primary

  with recirculation of the priming solution · CPC title

• F16K11/02

  with all movable sealing faces moving as one unit · CPC title

• A61M1/3643

  Priming, rinsing before or after use · CPC title

• F16K15/18

  with actuating mechanism; Combined check valves and actuated valves · CPC title