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

Patent metadata

Field	Value
Publication number	US-2017136169-A1
Application number	US-201515126251-A
Country	US
Kind code	A1
Filing date	Mar 13, 2015
Priority date	Mar 14, 2014
Publication date	May 18, 2017
Grant date	—

Abstract

A blood treatment cassette having a cassette body, designed as a hard part, and a film, wherein the film is connected with the hard part and covers the hard part at least partially, wherein the hard part comprises at least one valve base of a valve and wherein the valve is embodied to take, in addition to a first, open position of the valve in which the valve base and the section of the film that is arranged above it do not touch each other, a second, closed position of the valve when applying force on the section of the film in which the valve base and the section of the film touch each other.

First claim

1 - 19 . (canceled)

20 . A blood treatment cassette comprising a cassette body having a hard part and a film, wherein the film is connected with 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 closed 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 hard part and the film touch each other in a main contact plane and are connected to each other in the main contact plane along channel bars that extend alongside chambers or channels of the hard part, wherein the blood treatment cassette comprises in the area of the valve at least one hump which is supported by the hard part and is configured to sustain the valve in the first open position while the blood treatment cassette is in a non-use condition.

21 . The blood treatment cassette according to claim 20 , wherein the valve is configured to be moved from the first position into the second position by pressure applied to the section of the film by an actuator of a blood treatment apparatus when the blood treatment cassette is connected to the blood treatment apparatus.

22 . The blood treatment cassette according to claim 20 , wherein the valve is a film valve or phantom valve.

23 . The blood treatment cassette according to claim 20 , wherein the hump is elevated relative to the main contact plane away from the hard part.

24 . The blood treatment cassette according to claim 23 , wherein the hump projects above the valve base by a distance of 2 to 4 times of the thickness of the film.

25 . The blood treatment cassette according to claim 20 , wherein a space that is 6 to 12 times the thickness of the film is provided between the valve base and a next adjacent section of the hump in a plane parallel to the main contact plane.

26 . The blood treatment cassette according to claim 20 , wherein a section of the hump has a diameter that is 5 to 12 times the thickness of the film.

27 . The blood treatment cassette according to claim 20 , wherein the hump is not part of the channel bars that extend alongside the chambers or the channels of the hard part.

28 . The blood treatment cassette according to claim 20 , wherein a space that is to 3 to 8 times the diameter of the hump is provided between the hump and an adjacent one of the channel bars in an area where the hump touches the film.

29 . The blood treatment cassette according to claim 20 , wherein the valve base is arranged at a level of the main contact plane of the film.

30 . The blood treatment cassette according to claim 20 , wherein the valve base is configured in a flat manner in a longitudinal direction.

31 . The blood treatment cassette according to claim 20 , wherein the valve base is configured in a curved manner in a longitudinal direction.

32 . The blood treatment cassette according to claim 20 , wherein the valve base is configured in a concave or convex manner in a longitudinal direction.

33 . The blood treatment cassette according to claim 31 , wherein the valve base defines a recess having a depth of 2 to 4 times the thickness of the film.

34 . The blood treatment cassette according to claim 20 , wherein the valve base has a length that is 10 to 30 times the thickness of the film.

35 . The blood treatment cassette according to claim 20 , wherein the valve base defines a recess having a depth that is 1 to 3 times the thickness of the film

36 . The blood treatment cassette according to claim 20 , wherein the valve base is spaced from adjacent channel edge bars by a distance 1 to 3 times the thickness of the film towards the cassette interior.

37 . A blood treatment system, comprising:
a blood treatment apparatus comprising an actuator-sensor-plate comprising an actuator and a sensor; and a blood treatment cassette configured to be connected to the blood treatment apparatus, the blood treatment cassette comprising a cassette body having a hard part and a film, wherein the film is connected with 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 closed 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 hard part and the film touch each other in a main contact plane and are connected to each other in the main contact plane along channel bars that extend alongside chambers or channels of the hard part, wherein the blood treatment cassette comprises in the area of the valve at least one hump which is supported by the hard part and is configured to sustain the valve in the first open position while the blood treatment cassette is in a non-use condition, and wherein at least one of the actuator and the sensor of the actuator-sensor plate of the blood treatment apparatus is configured to interact with the blood treatment cassette when the blood treatment cassette is connected to the blood treatment apparatus.

38 . The blood treatment system according to claim 37 , wherein the actuator-sensor-plate comprises an actuator-sensor-mat configured to contact the blood treatment cassette when the blood treatment cassette is connected to the blood treatment apparatus, and the actuator-sensor-mat is thinner in a section that contacts the hump of the blood treatment cassette than in other sections of the actuator-sensor-mat.

39 . The blood treatment system according to claim 38 , wherein the actuator-sensor-mat, in the section that contacts the hump of the blood treatment cassette, defines a recess that prevents the actuator-sensor-mat in the area of the recess from contacting the actuator-sensor-plate.

40 . The blood treatment system according to claim 39 , wherein the recess is in the form of a notch.

41 . The blood treatment system according to claim 37 , wherein the actuator-sensor-plate comprises an actuator-sensor-mat configured to contact the blood treatment cassette when the blood treatment cassette is connected to the blood treatment apparatus, wherein the actuator-sensor-plate or the actuator-sensor-mat comprises, in a section that contacts the valve base, a hump.

Assignees

• Fresenius Medical Care Deutschland Gmbh

Inventors

• Lauer Martin

Classifications

• A61M2205/128

  with incorporated valves · CPC title

• A61M2206/20

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

• A61M1/168

  Sterilisation or cleaning before or after use · CPC title

• A61M1/14 Primary

  Dialysis systems; Artificial kidneys; Blood oxygenators (semi-permeable membranes characterised by the material, manufacturing processes therefor B01D71/00){; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis} · CPC title

• A61M1/367 Primary

  Circuit parts not covered by the preceding subgroups of group A61M1/3621 · CPC title