Medical Fluid-Conducting Cassette With Contact Protection

Abstract

The present disclosure relates to a medical fluid-conducting cassette for a medical fluid treatment that includes a hard body defining channels for guiding fluids through the cassette; a first film section arranged to cover parts of the hard body against an exterior of the cassette; at least one connection point configured to connect at least one of the channels with an exterior of the cassette in a fluid communication; and at least one covering device attached to the hard body and arranged so as to cover the connection point in a releasable or removable manner. In some embodiments, the covering device is a second film section made from the same material as the first film section.

Claims

1-18. (canceled)

19. A medical fluid-conducting cassette for a medical fluid treatment, the medical fluid-conducting cassette comprising: a hard body defining channels configured to guide fluids through the medical fluid-conducting cassette; a first film section arranged to cover parts of the hard body and arranged to cover at least one of the channels against an exterior of the medical fluid-conducting cassette; a connection point configured to connect at least one of the channels with an exterior of the medical fluid-conducting cassette in a fluid communication; and a covering device attached to the hard body and arranged so as to cover the connection point, wherein the covering device is or comprises a second film section made from the same material as the first film section.

20. The medical fluid-conducting cassette according to claim 19, wherein the first film section and the second film section are integrally formed or produced.

21. The medical fluid-conducting cassette according to claim 19, wherein the first film section and the second film section are linked to one another by a perforation section comprising: a perforation line, and at least two connectors integral with both the first film section and the second film section, wherein the at least two connectors are spaced from each other.

22. The medical fluid-conducting cassette according to claim 19, wherein the first film section and the second film section are linked to one another by a perforation section comprising: a perforation line, or at least two connectors integral with both the first film section and the second film section, wherein the at least two connectors are spaced from each other.

23. The medical fluid-conducting cassette according to claim 19, wherein the first film section and the second film section are welded one to the other.

24. The medical fluid-conducting cassette according to claim 19, wherein the first film section and the second film section are glued one to the other.

25. The medical fluid-conducting cassette according to claim 19, wherein the second film section is welded to the hard body.

26. The medical fluid-conducting cassette according to claim 19, wherein the first film section and the second film section are welded to the hard body, wherein welding methods or parameters used for the first and second film sections differ.

27. The medical fluid-conducting cassette according to claim 19, wherein the second film section comprises an interconnecting element configured for interconnecting the second film section to a transport packaging of the medical fluid-conducting cassette.

28. The medical fluid-conducting cassette according to claim 27, packed into the transport packaging, wherein the second film section is interconnected to the transport packaging of the medical fluid-conducting cassette by the interconnecting element.

29. The medical fluid-conducting cassette according to claim 27, wherein the interconnecting element is an adhesive strip, material or layer.

30. The medical fluid-conducting cassette according to claim 27, wherein the interconnecting element is a strip with adhesive properties on both sides.

31. The medical fluid-conducting cassette according to claim 19, wherein the second film section is configured to be sterilized with the first film section.

32. The medical fluid-conducting cassette according to claim 19, wherein at least one connection point is a fluid fitting connection point for a substituate line or a substituate addition site.

33. The medical fluid-conducting cassette according to claim 19, embodied as a blood cassette.

34. A method for covering a hard body of a medical fluid-conducting cassette for a medical fluid treatment by a film material, the method comprising: providing a medical fluid-conducting cassette, the medical fluid-conducting cassette comprising: a hard body defining channels for guiding fluids through the medical fluid-conducting cassette; and at least one connection point configured to connect at least one of the channels with an exterior of the medical fluid-conducting cassette in a fluid communication; attaching a first film section to the hard body so as to cover parts of the hard body and so as to cover at least one of the channels against an exterior of the medical fluid-conducting cassette; and attaching a second film section of a covering device to the hard body so as to cover the connection point in a releasable or removable manner, the second film section comprising the same material as the first film section.

35. The method according to claim 34, wherein the first film section and the second film section are attached to the hard body in the same working step, and wherein the first film section and the second film section were produced integrally with each other.

36. The method according to claim 34, wherein the first film section and the second film section are attached to the hard body in the same working step or wherein the first film section and the second film section are produced integrally with each other.

37. The method according to claim 34, further comprising: providing or generating a perforation line or gaps or slits between the first film section and the second film section of the covering device.

38. The method according to claim 34, further comprising: attaching at least one interconnecting element to the second film section on a side of the second film section that does not face the connection point.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0060] The present disclosure is hereafter exemplarily explained by means of the appended drawing, in which identical reference numerals refer to identical or similar components. In the figures it applies that:

[0061] FIG. 1 shows a medical fluid-conducting cassette from one side;

[0062] FIG. 2 shows the medical fluid-conducting cassette of FIG. 1;

[0063] FIG. 3 shows the medical fluid-conducting cassette of FIG. 2;

[0064] FIG. 4 shows a medical fluid-conducting cassette according to another embodiment from one side;

[0065] FIG. 5 shows the medical fluid-conducting cassette in another embodiment; and

[0066] FIG. 6 shows the medical fluid-conducting cassette of FIG. 5 in a transport packaging.

DETAILED DESCRIPTION OF THE FIGURES

[0067] FIG. 1 shows a possible embodiment of the cassette 1000, here exemplary a medical fluid-conducting cassette 1000 (short: cassette 1000). The cassette 1000 comprises a hard body 1 comprising channels such as the substituate conduit 49 for guiding a medical fluid such as substituate or blood through the hard body 1.

[0068] The hard body 1 is covered by a first film section 3.

[0069] The cassette 1000 comprises a connection point or a connection section 41 embodied, in this exemplary embodiment, as a substituate addition site 41.

[0070] For better understanding only, a second film section 3 that is also comprised by the cassette 1000 is not shown in FIG. 1, but is shown in FIG. 2 to FIG. 4.

[0071] As discussed above, the substituate addition site 41 needs to be protected against the environment in a manner such that it remains sterile until use of the cassette 1000.

[0072] FIG. 2 shows the cassette 1000 of FIG. 1. In contrast to FIG. 1, a second film section 3 is illustrated in FIG. 2.

[0073] The second film section 3 is made from the same material as the first film section 3. It is arranged so as to cover the connection point, here the substituate addition site 41.

[0074] Thus, an unintended touching of the substituate addition site 41 (the connection point or fluid coupling fitting) of the cassette 1000 before use, i.e., before mounting the cassette 1000 to a fluid treatment apparatus, is prevented by the covering device. Since the second film section 3 covers not only the very spot of the substituate addition site 41, but has been provided with a generous rim or overhang with respect to the hard body 1, unintended touching of the connection point 41 is prevented by the second film section 3 even during removal of the second film section 3.

[0075] As can be seen from FIG. 1 and FIG. 2, the first film section 3 seals the channels of the hard body 1 (such as the substituate conduit 49) against an exterior of the cassette 1000 by a peripheral weld by which the first film section 3 is welded to the sealing bar 4 of the hard body 1. The sealing bar 4 can be a closed structure with no beginning and no end; it may project from the main level of the hard body 1.

[0076] Likewise, the second film section 3 can be welded to the hard body 1 as well. The weld can be a closed structure, it may be continuous or intermittent, it may follow both the sealing bar 4 and/or another sealing bar 4 positioned on opposite sides of the substituate addition site 41 (connection point) and thus, together with the sealing bar 4, enclosing the substituate addition site 41 (connection point).

R

[0077] The aforementioned closed structure can be a combination of the sealing bar 4 and the further sealing bar 4.

[0078] Alternatively, or in addition, the second film section 3 can be glued to the hard body 1, preferably in a manner that allows easy removal of the second film section 3 when required.

[0079] The first film section 3 and the second film section 3 can be made from a common piece or layer of film. However, between the first film section 3 and the second film section 3 a perforation line 6 can be provided. The perforation of the perforation line 6 may allow manual tearing the second film section 3 off the first film section 3, or the remainder of the cassette 1000, in order to use the cassette 1000 and/or the substituate addition site 41.

[0080] A perforation may be a combination of a multitude of openings and interposed non-openings (e.g., film material). Likewise, if the second film section 3 is interconnected to the first film section 3 one might also speak of a perforation.

[0081] The first film section 3 and the second film section 3 may be interconnected or integral with each other by a perforation which is a sequence of subsequent openings separated from each other by a multitude of film sections in FIG. 2. Alternatively, the first film section 3 and the second film section 3 may be interconnected or integral with each other by a small number of struts or connectors, which are preferably also made from the film material comprised by the first film section 3 and the second film section 3. For example, two, three or a few more struts or connectors should be enough for keeping the second film section 3 in place. Also, the smaller the number of struts or connectors is the easier it is for the user to remove the second film section 3 when using the cassette 1000.

[0082] The cassette 1000 may further comprise one or more of the following elements in any desired combination: A sealing bar 4, a sealing bar 4, a peripheral weld 5, a peripheral weld 5, a perforation line 6, an arterial patient connection 7, an arterial pressure measurement chamber 9, a connector 11 for the exit of blood from cassette 1000, a connector 13 for the entry of blood into cassette 1000; a chamber 15 with arterial post-pump, or pre-filter, pressure measurement site; an arterial filter conduit 17; a venous filter conduit 19; a venous blood chamber 21; an upper space 23 of the venous blood chamber 21; a lower space 25 of the venous blood chamber 21; a cross-sectional restriction 27 of the hard body 1 (hard body); a clot trap 29; a venous patient connection 31; an arterial addition site 33; a check valve 35 of the arterial addition site 33; a venous addition site 37; a check valve 39 of the venous addition site 37; a connector 43 for exit of substituate from the cassette 1000; a connector 45 for entry of substituate into the cassette 1000; a check valve 47 for addition of substituate; a pre-dilution addition valve 51 (phantom valve); a post-dilution addition valve 53 (phantom valve); a single-needle sterile membrane 55; a single-needle chamber 57; a blood surge redirection element 59; a single-needle blood valve 61 (phantom valve); an evacuation site 63 for vacuum coupling; a primary alignment center 65; a secondary alignment site 67; a pump tube segment 88 of blood pump; and a pump tube segment 90 of substituate pump.

[0083] Either one, or both, of sealing bar 4 and sealing bar 4 may protrude from the hard body 1 or from the level of the first film section 3.

[0084] In FIG. 2, the sealing bar 4 is shown not to be covered by a film at all. The invention is, however, not limited to this. Rather, the film layer of which the first film section 3 and the second film section 3 are made may cover the sealing 4 as well. Any perforation, gaps or the like may, for example, be arranged on top or next to the sealing bar 4.

[0085] FIG. 3 shows the medical fluid-conducting cassette of FIG. 2. What is highlighted in FIG. 3 is the path along which the second film section 3 can be welded to the hard body 1 of the cassette 1000.

[0086] As can be seen in FIG. 3, the welding path can be or may circumscribe a closed structure, surrounding the substituate addition site 41 (connection point) in a closed manner or loop. It may, as in FIG. 3, have the shape of the number 8.

[0087] Also, in FIG. 3 as may be the case in any other embodiment an interconnecting element 150 is connected to the second film section 3.

[0088] The interconnecting element 150 can be an adhesive, a sticky tape, a VELCRO fastener, a tape that is adhesive on both sides or double-sided adhesive tape, or the like.

[0089] The interconnecting element 150 serves to keep the second film section 3 securely attached to a lid 201 of a transport packaging 200 only shown in FIG. 6 and is, hence, discussed further with respect to FIG. 6.

[0090] FIG. 4 shows a medical fluid-conducting cassette 1000 according to another embodiment.

[0091] The second film section 3 comprises a flap or removal flap 91 which extends from a rim of the second film section 3 and may facilitate getting a grip on the second film section 3 in order to tear it off the cassette 1000.

[0092] Also, two end sections or edge sections 93 and 95 are emphasized by circles in FIG. 4. At sections 93 and 95 the sealing bar 4 joins with the sealing bar 4. In the example of FIG. 4, this junction is where the second film section 3 ends. In other embodiments, there is no such junction, but the second film section 3 ends nevertheless in some end sections.

[0093] At least one of the end or edge sections 93, 95, the second film section 3 may be connected to the first film section 3 in a manner which differs from how the two film sections 3, 3 are interlinked with each other. For example, in either of sections 93, 95, the two film sections 3, 3 may be integral without perforation between them. That way, the second film section 3 may be firmly connected to the first film section 3. A perforation between them, e.g., between the two edge sections 93, 95 may not be needed in those embodiments. In particular, the two film sections 3, 3 may be cut into two separate pieces between the two edge sections 93, 95 that are solely responsible for keeping the second film section 3 to the first film 3 or for connecting them with each other.

[0094] In some embodiments, the edge sections 93, 95 are chosen such that they do not cover a rib of the hard body 1 and/or are not supported by a rib or other hard body structure from underneath.

[0095] FIG. 5 shows a medical fluid-conducting cassette 1000 in yet another exemplary embodiment.

[0096] Another interconnecting element 150 is connected to the second film section 3. It may be provided as a substitute or an alternative to the one shown in FIG. 3.

[0097] Again, the interconnecting element 150 can be an adhesive, a sticky tape, a VELCRO fastener, a tape that is adhesive on both sides or double-sided adhesive tape, or the like.

[0098] The interconnecting element 150 serves to keep the second film section 3 securely to a lid 201 of a transport packaging 200 only shown in FIG. 6 and is, hence, again further discussed with respect to FIG. 6.

[0099] FIG. 6 shows a transport packaging 200. The transport packaging 200 comprises a lid 201 covering or sealing a reception 203 of the transport packaging 200. The reception 203 holds or houses a cassette 1000 like that of FIG. 3. The cassette 1000 comprises the interconnecting element 150 mentioned above.

[0100] As can be derived from the illustration of FIG. 6, the interconnecting element 150 has obviously been attached to the lid 201 during the packing of the cassette 1000 into the transport packaging 200. Also, as is indicated by the arrow indicating that the lid 201 is being opened in FIG. 6, the interconnecting element 150 does not only stick to the lid 201 but also lifts or takes the second film section 3 with it which in turn is attached to the interconnecting element 150. That way the second film section 3 is removed from the cassette 1000 merely by opening the lid 201 of the transport packaging 200 upon opening the latter.

REFERENCE NUMERALS

[0101] 1000 cassette [0102] 1 hard part or hard body [0103] 3 first film section [0104] 3 second film section [0105] 4 sealing bar [0106] 4 sealing bar [0107] 5 peripheral weld [0108] 5 peripheral weld [0109] 6 perforation line [0110] 7 arterial patient connection [0111] 9 arterial pressure measurement chamber [0112] 11 connector for the exit of blood from cassette 1000, or: blood outlet connector [0113] 13 connector for the entry of blood into cassette 1000, or: blood inlet connector [0114] 15 chamber with arterial post-pump, or pre-filter, pressure measurement site [0115] 17 arterial filter conduit [0116] 19 venous filter conduit [0117] 21 venous blood chamber [0118] 23 upper space of the venous blood chamber 21 [0119] 25 lower space of the venous blood chamber 21 [0120] 27 cross-sectional restriction of the hard body 1 [0121] 29 clot trap [0122] 31 venous patient connection [0123] 33 arterial addition site [0124] 35 check valve of the arterial addition site 33 [0125] 37 venous addition site [0126] 39 check valve of the venous addition site 37 [0127] 41 substituate addition site, connection point [0128] 43 connector for exit of substituate from the cassette 1000 [0129] 45 connector for entry of substituate into the cassette 1000 [0130] 47 check valve for addition of substituate [0131] 49 substituate conduit; channel [0132] 51 pre-dilution addition valve (phantom valve) [0133] 53 post-dilution addition valve (phantom valve) [0134] 55 single-needle sterile membrane [0135] 57 single-needle chamber [0136] 59 blood surge redirection element [0137] 61 single-needle blood valve (phantom valve) [0138] 63 evacuation site for vacuum coupling [0139] 65 primary alignment center [0140] 67 secondary alignment site [0141] 88 pump tube segment of blood pump [0142] 90 pump tube segment of substituate pump [0143] 91 flap [0144] 93 end sections or edge section [0145] 95 end sections or edge section [0146] 150 interconnecting element [0147] 200 transport packaging [0148] 201 lid [0149] 203 reception