Blood treatment cassette with film valve and elastic spacer as well as blood treatment apparatus

Patent metadata

Field	Value
Publication number	US-2017080141-A1
Application number	US-201515126253-A
Country	US
Kind code	A1
Filing date	Mar 13, 2015
Priority date	Mar 14, 2014
Publication date	Mar 23, 2017
Grant date	—

Abstract

A blood treatment cassette having a cassette body comprising a hard part and a film that at least partially covers the hard part. The hard part comprises a valve base that cooperates with a section of the film adjacent the valve base to form a valve that is configured to be moved from a first open position in which the valve base and the section of the film do not touch each other to a second position in which the valve base and the section of the film touch each other when a force is applied to the section of the film. The blood treatment cassette comprises a spacer supported by the hard part, and the spacer is configured to apply, in the first position of the valve, force to the section of the film.

First claim

1 - 10 . (canceled)

11 . A blood treatment cassette having a cassette body comprising a hard part and a film, wherein the film is connected to the hard part and at least partially covers the hard part,
wherein the hard part comprises a valve base that cooperates with a section of the film adjacent the valve base to form a valve, wherein the valve is configured to be moved from a first open position in which the valve base and the section of the film adjacent the valve base do not touch each other to a second position in which the valve base and the section of the film adjacent the valve base touch each other when a force is applied to the section of the film adjacent the valve base, wherein the blood treatment cassette comprises a spacer supported by the hard part, and wherein the spacer is configured to apply, in the first position of the valve, force to the section of the film adjacent the valve base.

12 . The blood treatment cassette according to claim 11 , wherein the spacer is spring-loaded.

13 . The blood treatment cassette according to claim 11 , wherein the spacer is elastic.

14 . The blood treatment cassette according to claim 11 , wherein the valve is configured to be moved from the first position into the second position by pressure applied on the valve by an actuator of a blood treatment apparatus to which the blood treatment cassette is connected.

15 . The blood treatment cassette according to claim 11 , wherein the valve is a film valve or phantom valve.

16 . The blood treatment cassette according to claim 11 , wherein the spacer is an integral element of a spring element connected to the hard part.

17 . The blood treatment cassette according to claim 16 , wherein the spring element comprises at least two spacers, having at least one groove or recess between them.

18 . The blood treatment cassette according to claim 16 , wherein the spring element comprises a functional element.

19 . The blood treatment cassette according to claim 18 , wherein the functional element comprises one or more of a hydrophobic-membrane support-grid, a clot trap pad or a check valve

20 . The blood treatment cassette according to claim 18 , wherein a gap is formed between the spring element and the functional element.

21 . The blood treatment cassette according to claim 20 , wherein the gap is in the form of a split or a groove.

22 . The blood treatment cassette according to claim 11 , wherein the valve base defines a recess having a depth that is 1 to 3 times the thickness of the film.

23 . The blood treatment cassette according to claim 11 , wherein the valve base behind an adjacent channel edge bar is recessed to about 1 to 3 times the thickness of the film, in the direction toward an interior of the cassette.

24 . The blood treatment cassette according to claim 11 , wherein the spacer comprises a recessed upper edge whose curve rises in a direction relative to the direction of the valve base 1 to 4 times the thickness of the film.

25 . A system comprising:
a blood treatment apparatus comprising an actuator-sensor-plate; and a blood treatment cassette configured to be connected to the blood treatment apparatus, the blood treatment cassette having a cassette body comprising a hard part and a film, wherein the film is connected to the hard part and at least partially covers the hard part, wherein the hard part of the blood treatment cassette comprises a valve base that cooperates with a section of the film adjacent the valve base to form a valve, and the valve is configured to be moved from a first open position in which the valve base and the section of the film adjacent the valve base do not touch each other to a second position in which the valve base and the section of the film adjacent the valve base touch each other when a force is applied to the section of the film adjacent the valve base, wherein the blood treatment cassette comprises a spacer supported by the hard part, wherein the spacer is configured to apply, in the first position of the valve, force to the section of the film adjacent the valve base, and wherein the actuator-sensor-plate of the blood treatment apparatus comprises at least one actuator having at least two part-actuators configured to apply force to the section of the film adjacent the valve seat independently from each other.

26 . The system according to claim 25 , wherein the actuator-sensor-plate of the blood treatment apparatus comprises three or more part-actuators.

Assignees

• Fresenius Medical Care Deutschland Gmbh

Inventors

• Lauer Martin

Classifications

• A61M2205/273

  preventing reuse, e.g. of disposables · CPC title

• F16K7/12

  with flat, dished, or bowl-shaped diaphragm · CPC title

• A61M2205/3344

  Measuring or controlling pressure at the body treatment site · CPC title

• A61M2206/20

  having means for promoting or enhancing the flow, actively or passively · CPC title

• A61M2205/128

  with incorporated valves · CPC title