Substitution fluid pump integrated in a dialysis machine

Patent metadata

Field	Value
Publication number	US-10441698-B2
Application number	US-201514734695-A
Country	US
Kind code	B2
Filing date	Jun 9, 2015
Priority date	Jun 12, 2014
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A dialysis machine comprising internal fluidics, wherein the internal fluidics includes a dialysis fluid pump for pumping dialysis fluid from a dialysis fluid reservoir through a dialysis fluid feed line to a dialyzer and from the dialyzer through a dialysis fluid drain line to a waste reservoir, a substitution fluid pump for supplying dialysis fluid through a substitution fluid feed line as substitution fluid to an extracorporeal hose system including ports on the patient side and coupling means for connecting the extracorporeal hose system to the internal fluidics is disclosed.

First claim

The invention claimed is:

1. A dialysis machine comprising internal fluidics, the internal fluidics including the following components:
a dialysis fluid pump adapted to pump dialysis fluid from a dialysis fluid reservoir through a dialysis fluid feed line to a dialyzer and from the dialyzer through a dialysis fluid drain to a waste reservoir or to a waste line;
a substitution fluid pump adapted to supply dialysis fluid through a substitution fluid feed line to an extracorporeal blood conduit system having patient-side ports;
coupling means configured to connect the extracorporeal blood conduit system to the internal fluidics,
the internal fluidics having a drain line comprising a first drain line and a second drain line running parallel to the first drain line;
the internal fluidics further comprising a substitution fluid feed line comprising a first substitution fluid feed line and a second substitution fluid feed line running parallel to the first substitution fluid feed line;
the coupling means comprising coupling elements formed on each of the first drain line, second drain line, first substitution fluid feed line and second substitution fluid feed line, each coupling element configured to connect to the extracorporeal blood conduit system.

2. The dialysis machine according to claim 1 , wherein the drain line also leads to the dialysis fluid drain.

3. The dialysis machine according to claim 1 , wherein the first drain line and the second drain line fluid-communicate via a shut-off valve.

4. The dialysis machine according to claim 1 , wherein the substitution fluid feed line fluid-communicates with the drain line via a shut-off valve.

5. The dialysis machine according to claim 1 , wherein an air separator is arranged in the drain line.

6. The dialysis machine according to claim 1 , wherein the substitution fluid pump is arranged upstream of a branch to the coupling means, and wherein a control valve is arranged downstream of the branch for selectively controlling at least one of pre-dilution or post-dilution and is employed in each substitution fluid feed line.

7. A dialysis machine comprising:
a hollow casing including internal fluidics inside the hollow casing, the internal fluidics including the following components:
a dialysis fluid pump adapted to pump dialysis fluid from a dialysis fluid reservoir through a feed line to a dialyzer and from the dialyzer through a dialysis fluid drain to a waste reservoir or to a waste line,
a substitution fluid line branching off from the feed line for feeding dialysis fluid from the internal fluidics to an extracorporeal blood conduit system including patient-side ports, at least one first coupling means arranged on a side of the hollow casing of the dialysis machine and between the extracorporeal blood conduit system and the substitution fluid line, wherein the at least one first coupling means is in fluid communication with the substitution fluid line so as to couple the extracorporeal blood conduit system to the substitution fluid line,
a drain line having a second coupling means, the second coupling means configured to further connect the extracorporeal blood conduit system to the internal fluidics, wherein the drain line leads from the second coupling means to the waste reservoir or to the waste line, the drain line configured to drain fluid from the extracorporeal blood conduit system,
a substitution fluid pump adapted to supply the dialysis fluid through the substitution fluid line to the extracorporeal blood conduit system;
a first cover for the at least one first coupling means, the first cover positionable in an open state to provide access to the at least one first coupling means to connect the internal fluidics to the extracorporeal blood conduit system, and a closed state for covering the at least one first coupling means; and
a second cover for the second coupling means, the second cover positionable in an open state to provide access to the second coupling means to connect the internal fluidics to the extracorporeal blood conduit system, and a closed state for covering the second coupling means;

wherein, when the first cover and the second cover are in their respective closed states, a sealed volume fluid-connection with the at least one first coupling means and the second coupling means of the drain line is formed, forming a short-circuit flow path through which the substitution fluid line is fluid-connected to the drain line.

8. The dialysis machine according to claim 7 , wherein the drain line connects the extracorporeal blood conduit system to the waste reservoir.

9. The dialysis machine according to claim 7 , wherein the cover in the closed state is in sealing contact with one casing side.

10. The dialysis machine according to claim 7 , wherein the cover is a flap-type and is manually operable.

11. The dialysis machine according to claim 7 , wherein the sealed volume surrounds the at least one first coupling means and the second coupling means of the drain line.

12. The dialysis machine according to claim 9 , wherein the one casing side is a machine front face.

Assignees

• Braun Avitum Ag

Inventors

• Wolff Henrik
• Broeker Bjoern

Classifications

• A61M1/1682

  both machine and membrane module, i.e. also the module blood side · CPC title

• A61M1/3434

  with pre-dilution and post-dilution · CPC title

• A61M1/1601

  Control or regulation · CPC title

• A61M2205/3337

  Controlling, regulating pressure or flow by means of a valve by-passing a pump · CPC title

• A61M1/3649

  using dialysate as priming or rinsing liquid · CPC title