DE102016115269A1 - Dialysatorhalter - Google Patents

Abstract

The invention relates to a holding device (1), for attaching a filter (5), in particular a dialyzer / hemofilter or a filter cartridge, to a medical device for extracorporeal blood treatment, with a filter holder (2) having a, for partially enclosing the filter (5) adapted, essentially cup / trough-shaped contact surface / pressure plate (11) is provided, a connection (12) of the filter holder (2) to the medical device for extracorporeal blood treatment, and a flexible band (3) and a locking device (4 ).
In this case, the flexible band (3) and the locking device (4) are arranged such that the flexible band (3) can be brought into engagement with the locking device (4) in order to position the filter (5) positioned between the filter holder (2) and the flexible band ) to hold against the contact surface / pressure plate (11).

Description

The invention relates to a holding device for mounting / mounting a filter, in particular a dialyzer / hemofilter or a filter cartridge, on a medical device for extracorporeal blood treatment, e.g. a dialysis machine, the holding device having a filter support with a contact surface / pressure plate, a flexible / elastic band and a locking device and the flexible band can hold the filter against the pressure plate when it is brought into engagement with the locking device.

The invention further relates to a medical device for extracorporeal blood treatment with such a holding device.

Background of the invention

As part of an extracorporeal blood treatment dialyzers are necessary as an artificial kidney for the purification of the blood. For this purpose, a dialyzer, which is generally provided as a disposable article, must be securely attached to the dialysis machine, preferably on the outside, at the beginning of a therapy. From the state of the art, a large number of holding devices for dialyzers is known for this purpose.

State of the art

Usual is the use of gripping or clamping legs that can accommodate a dialyzer positive and / or non-positive. The gripping or clamping force can in this case, for example, by the inherent elasticity of the gripping or clamping leg ( US 2007 252 057 A1 ), by a spring ( DE 10 2012 104 157 A1 ) or via a threaded rod at the distal end of the gripping or clamping legs ( CN 204 193 160 U ) to be provided. Also known from the prior art are clamp-like holding devices for dialyzers, in which two rigid, articulated clamp halves with a semicircular receiving surface surround the dialyzer and are fixed by screw or snap connections ( WO 2011 106 233 A2 ).

DE 696 25 352 T2 discloses a dialyzer holder with a pivotable L-shaped arm.

DE 696 252 79 discloses a pivotable dialyzer holder with integrated clutch assembly for delivering a fluid to the dialyzer.

The solutions known from the prior art all have the disadvantage that they many different and difficult to clean parts, such. B. bearings, springs and bushings and / or have complex geometries. This results in high assembly costs, expensive production and poor disinfectability.

Brief description of the invention

The newly designed holding device has the task of providing a Dialysatorhalterung, which is characterized in the production by a lower assembly cost and a reduction in the number of components compared to conventional Dialysatorhalterungen. It should preferably be cheap, both in production and in the procurement of materials. Furthermore, the present invention has the preferred object of providing an easily disinfected geometry with as few dead spaces as possible so that a dialyzer holder according to the invention can be completely disinfected by wiping and spray disinfection. Dialyzers / hemofilters or filter cartridges are available in various sizes (membrane surface, outside diameter, etc.). Therefore, the present invention further provides the preferred object of providing a flexible support which can accommodate filters of different diameters. In addition, a holding device according to the invention should be intuitive, easy and quick to use, even by untrained personnel. In particular, a holding device according to the invention makes the preferred task of permitting only a secure fastening of a dialyzer / hemofilter or a filter cartridge or preventing negligent fastening.

The above-mentioned objects and objects are achieved according to the invention with a holding device / having at least the technical features mentioned in the independent claim 1. Advantageous developments of the holding device are the subject of the dependent claims.

The holding device according to the invention serves for holding a dialyzer / hemofilter or a filter cartridge on a medical device for extracorporeal blood treatment, in particular a dialysis machine. For this purpose, the holding device is provided with a cup / trough-shaped filter holder whose preferably concave (preferably shell / trough-shaped) surface forms a contact surface / pressure plate for a filter, wherein the contact surface / pressure plate is preferably adapted to the example cylindrical or cuboid filter partly to enclose. The filter holder also has, preferably on its side facing away from the contact surface / pressure plate (or edge), a connection to the dialysis machine, for example, at least one mounting base, an arm or a fastening tab. Furthermore, according to the invention, a flexible / elastic band is arranged or formed on a peripheral edge of the filter receptacle, which is located in the transition region or at the interface between filter receptacle and flexible / elastic band, preferably substantially in extension to the filter receptacle or approximately in the circumferential direction extends beyond the edge. On the opposite circumferential edge of the filter holder, according to the invention, a locking device (eg a hook, an eye, a buckle, etc.) is arranged or formed, with which the band can be brought into engagement at its free end section while enclosing the filter. In other words, a dialyzer is encompassed in the locked state of the holding device in its circumference by the flexible / elastic band and the contact surface / pressure plate and thereby experiences a pressing / holding force against the contact surface / pressure plate.

The preferably shell / gutter shape of the pressure plate / contact surface acts to support a centered against this or applied to this, matching filter automatically and / or align in the axial direction parallel to the filter holder. In other words, according to the invention, the geometry of the pressure plate / abutment surface can help to achieve a defined positioning / orientation of the filter relative to the dialysis machine, which may be helpful in particular for the management of the dialysis machine or the filter.

Preferably, the shape / curvature of the contact surface / pressure plate is shaped so that per se no holding function without the interaction with the flexible / elastic band can exercise, so only serves as Auf- / plant without internal clamping effect, i. can not enter a clamping positive connection with the filter. This can be achieved constructively in that the radius of curvature of the abutment surface / pressure plate is greater than the intended filter and / or the circumferential extent of the abutment surface is less than half the circumferential extent of the intended filter. For a contact surface for cylindrical filters, it would accordingly be e.g. advantageous if the circumferential extent of the contact surface is less than a semicircle. The lack of an internal clamping function of the abutment surface / pressure plate can prevent the operator of the dialysis machine from preventing a filter, e.g. due to negligence, only clamped to the contact surface / pressure plate without properly fixing the filter with the flexible / elastic band. Such inadequate attachment of the filter can sometimes have devastating consequences in extracorporeal blood treatment, e.g. could a filter during a treatment due to a shock o.ä. from the holding device. A holding device according to the invention thus helps to avoid mistakes and to protect the health of the patient by forcing the user to fix the filter properly in the holding device.

For fixing a dialyzer to a dialysis machine with the aid of a holding device according to the invention, the filter can firstly be held / pressed manually against the contact surface / pressure plate and advantageously centered and aligned by the complementary geometry of contact surface / pressure plate. Thereafter, the flexible / elastic band may be wrapped around and wrapped around the filter and engaged with the locking device at the opposite end of the filter receptacle such that the filter is pressed against the abutment surface / pressure plate by the flexible / elastic band.

It should be noted at this point that the flexible / elastic band in its geometry may be preferably elongated and flat, but should not be limited to the classic definition of a band. Rather, it is sufficient if the flexible / elastic band is elongated and flexible in at least one longitudinal direction / elastically stretchable to fulfill its function according to the invention. But it could also be used as a string, a rope or a chain as a band, for example, wherein at one point between the contact surface / pressure plate and tape elasticity is generated.

Preferably, the filter receptacle is formed so that the end faces of a filter received therein / fixed thereto remain free, so that no obstructions are present at the axial ends of the filter. This is important in that on the front sides of the filter usually inlet and outlet connections / passages are provided for the circulating through the filter blood. It is therefore advantageous if a filter fixed in the holding device is held / secured in the axial direction only by the flexible / elastic band, or by the pressing / holding force exerted thereby, so that no additional holding is provided at the axial ends of the filter - / securing elements are needed, which could hinder the connection of the tube system of extracorporeal blood circulation to the filter. This can be done in particular by friction.

Since the inlet and outlet passages / connections for the dialysis fluid are usually peripherally arranged in dialyzers, according to a preferred embodiment, the holding device can be dimensioned so that its maximum axial dimensioning not more than half, preferably not more than a quarter, particularly preferred not more than 15%, the axial Length of a filter to be attached is. In this way, even with changing models / designs of the filter, good accessibility to peripheral fluid passages / connections can be ensured.

According to a preferred embodiment, the contact surface / pressure plate is closed and / or designed with a smooth, flat surface to ensure the easiest possible disinfectability by means of spray / wipe disinfection. Alternatively, however, the surface may also have a structure, e.g. Nubs, grooves, etc., in the case of grooves, these preferably extending along (substantially parallel) the axis of the filter cartridge when it is positioned in the correct (predetermined) manner on the contact surface / pressure plate.

According to the invention may be used for the contact surface / pressure plate preferably a rigid material relative to the band, such as a thermoplastic or thermosetting plastic, while for the flexible / elastic band preferably over the pressure plate elastic material can be used, for example an elastomer or TPE. It is advantageous if the material of the flexible / elastic band has a high coefficient of friction in order to provide additional support against displacement of the filter in its axial direction.

According to an advantageous embodiment, the locking device can be made integral with the pressure plate. That is, pressure plate and locking device can be made in one piece, for example, by the low-cost injection molding process.

According to a preferred embodiment, the locking device may be formed as a pin or hook, which can be brought into engagement with corresponding, provided on the flexible / elastic band holes. It is advantageous if the flexible / elastic band has a certain elasticity in the longitudinal direction, so that can be pressed against the pressure plate via elastic restoring or spring forces of the flexible / elastic band of the filter. Conveniently, the flexible / elastic band can have a plurality of holes, so that dialyzers of different diameter / size can be fixed to the holding device. The holes can be z. B. round, oval or square. Larger holes are advantageous in such an embodiment because they are more accessible than smaller holes and therefore the gaps can be better cleaned. In a holding device according to such an embodiment, a filter corresponding to the diameter of the filter selected hole of the flexible / elastic band would be placed over a pin / hook or engaged with this for fixing a filter, so that the flexible / elastic band stretched thereby is and the filter is pressed by the restoring force against the pressure plate. Such an embodiment has the advantage of not requiring additional components and being quickly closable compared to many other locking mechanisms.

According to one embodiment, the flexible / elastic band can be made integral with the pressure plate, in particular in the two-component injection-molding process. The pressure plate is in such an embodiment, a hard component and the flexible / elastic band is a soft component. Thus, according to a particularly preferred embodiment, the entire holding device with pressure plate, flexible / elastic band and locking device can be made in one piece by two-component injection molding, resulting in a favorable production without additional Mounting steps and a simple cleaning and disinfecting without disassembly of the holding device allows.

According to one embodiment, in integral manufacture of pressure plate and flexible band, the pressure plate may have a taper at that outer circumferential end on which the flexible band is molded. In other words, at a tapered location, the pressure plate may be over-molded or over-molded from the flexible / elastic tape material or, if other manufacturing techniques are used, otherwise enclosed. Preferably, the taper may extend quasi in extension to the circumferential direction of the contact surface / pressure plate and taper in both the radial and in the axial direction. It is advantageous if the soft component adheres to the hard component. This can be ensured, for example, by suitably selecting the material and / or pretreating the surface at the interface between the printing plate and the flexible / elastic band.

Advantageously, the taper described above may have a bore / recess which is filled in the molding / making the flexible / elastic band to the pressure plate of the soft component, so that in addition to an adhesive and a positive connection between the pressure plate and flexible / elastic band. It is advantageous if this bore / recess is oriented transversely to the longitudinal direction of the flexible / elastic band in order to provide additional strength, above all against a tensile stress of the band. You could also say that the rejuvenation can be designed approximately bow-shaped.

It is also advantageous if, in integral production of pressure plate and flexible / elastic band, the flexible / elastic band is attached to the pressure plate so that in the transition region from hard to soft component results in a flat, smooth surface, which easily with Disinfect wiping and spray disinfection.

According to another embodiment, printing plate and flexible / elastic band can also be releasably connected to each other. This offers the possibility that the flexible / elastic band can be replaced if it should be damaged or torn by improper handling or excessive tensile stress. In this case, the detachable connection may preferably be designed such that it has its highest strength in the longitudinal direction of the flexible / elastic band or in the direction of the tensile force acting on a filter during clamping.

According to such an embodiment with releasably secured, flexible / elastic band, the contact surface / pressure plate may advantageously comprise at least one pin, which may preferably be aligned in the axial direction of a fixed filter, or orthogonal to the longitudinal direction of the flexible / elastic band. Accordingly, the flexible / elastic band may comprise at least one receiving device for such a pin, which may for example be formed as a cylindrical recess, so that the flexible / elastic band slipped over the at least one pin, or the pin can be inserted into the recess. As a result, both components, even under tensile stress, in the radial direction of the pin / pins, or in the longitudinal direction of the flexible / elastic band, inseparably connected to each other. However, replacement of the soft component in such an embodiment is still possible by withdrawing the flexible / elastic band from the at least one pin in the axial direction.

According to preferred embodiments, the shell / trough-shaped contact surface / pressure plate in its cross section either concave round, or C-shaped, or concave square, or V-shaped, may be formed. A concavely round shape may be e.g. Good for the mostly cylindrical Hohlfaserdialysatoren suitable, a concave angular shape, however, can be well suited for the most cuboid plate dialyzers. Finally, it is also possible in principle to form the contact surface / pressure plate flat (not arched).

The invention further comprises a medical device for extracorporeal blood treatment, which comprises a holding device on the housing of the device, which is designed according to the invention.

Further features and advantages of the present invention will become apparent from the following exemplary and non-limiting description of the invention and particularly preferred embodiments with reference to figures. These are merely schematic in nature and are only for understanding the invention.

figure description

From the pictures shows:

1 a top view and two side views of a first, integrally manufactured embodiment of the holding device;

2 a plan view and two side views of a second embodiment of the holding device with releasably secured, flexible / elastic band;

3 a plan view of an embodiment with angled contact surface / pressure plate; and

4 a side view of an embodiment of the holding device according to the invention 1 ,

1 shows a first exemplary embodiment of a holding device produced integrally by the two-component injection-molding method 1 for fixing or fixing a dialyzer / hemofilter or a filter cartridge 5 on a dialysis machine. The dialysis machine and a connection of the holding device 1 to the dialysis machine are not shown here, as well as in the following figures.

The figure shows a plan view of the holding device / the filter holder in the middle figure 1 as well as left and right of the two side views. In principle, the holding device according to the invention 1 with a shell / channel-shaped, or in cross-section semi-circular filter holder 2 provided, which is designed in this embodiment as a C-profile. You could change the geometry of the filter holder 2 Here also refer to a hollow cylinder or pipe cut. The concave side of the filter holder 2 forms a contact surface / pressure plate 11 for the cylindrical filter in this example 5 and is adapted to partially enclose it circumferentially. The radius of curvature R _{H of} the contact surface / pressure plate 11 here is deliberately kept larger than the radius of curvature of the filter R _F and the circumferential extent of the contact surface / pressure plate 11 is deliberately kept smaller than a semicircle, leaving the contact surface / pressure plate 11 in itself no holding force or no clamping action on the filter 5 can exercise.

On the filter 5 facing away, convex side of the filter holder 2 protrudes from this, trained here as a rectangular profile and integral with the filter holder 2 finished, arm or mounting base 12 which, for connecting the holding device 1 to the dialysis machine.

Am, in plan view right, peripheral edge of the filter holder 2 This makes a rejuvenation 7 , which is almost in extension to the filter holder 2 , extends approximately in the circumferential direction beyond the edge and for molding or molding of a flexible / elastic band 3 serves. The rejuvenation 7 Tapered in both the radial and in the axial direction, so that they completely from the soft component of the flexible / elastic band 3 encapsulated / encased and the flexible / elastic band 3 Nevertheless, at its base or its proximal end, the geometry or the surface of the filter holder 2 , at least for a while, can continue in the circumferential direction. In this way, results in a flat surface of the filter holder 1 in the interface area, which can be completely disinfected by wiping and spray disinfection. The rejuvenation 7 has a bore / recess 8th on. This is in the radial direction or transverse to the longitudinal direction of the flexible / elastic band 3 executed and can when molding / molding of the flexible / elastic band 3 to the rejuvenation 7 be filled by the soft component, so as to form a fit between the filter holder 2 and flexible / elastic band 3 and thus to ensure a higher strength in the direction of a later tensile stress. As a soft component to the filter holder 2 molded flexible / elastic band 3 According to such an embodiment, therefore, both adhesively and positively are inseparable from the filter holder 2 connected.

At the rejuvenation 7 opposite circumferential end of the filter holder 2 is a locking device 4 arranged / molded, here as integral with the filter holder 2 manufactured pin or hook is executed and with the free end portion of the flexible / elastic band 3 , while clamping the filter 5 , can be engaged. The flexible / elastic band 3 has at its distal, free end portion a plurality of holes 6 on, which are shown in this example angular, but as described above can be represented differently.

To fix the filter 5 this can be done by the user against the contact surface / pressure plate 11 held and the flexible / elastic band 3 , the filter 5 encompassing in its circumference to be laid around this. Subsequently, one can correspond to the diameter of the filter 5 chosen hole 6 over the pin / hook 4 be slipped so that the flexible / elastic band 3 a holding force on the filter 5 exercises.

To the grip of the flexible / elastic band 3 To improve and thus the user applying a clamping force on the filter 5 is on the outside, distal end of the flexible / elastic band 3 a corrugation provided.

According to a in 2 illustrated second embodiment, filter receptacle 2 and flexible / elastic band 3 Also be carried out detachable from each other. The figure shows again in the middle the top view and left and right side views of the fixture 1 , In the plan view here is again on the left peripheral edge of the filter holder 2 the locking device 4 , designed as a pin / hook, and on the right peripheral edge of the filter holder 2 , this time detachable, the flexible / elastic band 3 arranged.

The filter holder 2 has in this embodiment at its right peripheral edge a recess 13 on, which is not continuous in the axial direction and both to an axial edge and to the peripheral edge of the filter holder 2 opens. In the recess 13 are two pens in this example 9 arranged, which is substantially parallel to the axial direction of the here again zylinderschalenausschnitt- or C-shaped filter holder 2 are oriented and therefore protrude from the plane of the drawing in plan view.

The flexible / elastic band 3 has complementary to the pins 9 trained recording devices 10 on, which are here Sacklochbohrungsförmig, or formed as a cylindrical recesses, in the axial direction of the pins 9 to be postponed or over the pins 9 to be put on.

This is the flexible / elastic band 3 in the radial direction of the pins 9 by inseparable connected by positive engagement with these, but can replace a defective band 3 simply axially out of the recess 13 out and from the pins 9 be pulled down.

3 shows a plan view of another embodiment of a holding device according to the invention 1 , This may essentially correspond to one of the embodiments described above, but has a concave square instead of a round contact surface / pressure plate 11 on. You could change the shape of the cross section of the filter holder 2 with her arm / mounting base 12 here also as Y-shaped designate. This embodiment is intended to illustrate that in addition to a concave round also other geometries of the contact surface / pressure plate 11 are conceivable to this to the geometry of a preferred (in this example, about cylindrical or cuboid) filter 5 adapt.

4 shows a side view of an embodiment of the holding device according to the invention 1 with a filter clamped therein by way of example 5 , The cylindrical filter 5 In this example, it is provided with a blood supply passage B _Zu at its upper end side and with a blood discharge passage B _Ab at its lower end side. In the upper end section of the filter 5 a discharge passage DAb is provided on the circumference for the dialysis fluid, and a corresponding supply passage DZu for the dialysis fluid is arranged at the lower end section. In order to allow free access to the fluid passages (B _Zu , B _ab , D _Zu , D _Ab ) and an ergonomic connection of the hose system, the invention provides that the end faces of a in the holding device 1 clamped filter 5 remain free. In particular, this can be the axial length L _{H of} the holding device 1 not more than 50%, preferably not more than 25%, more preferably not more than 15%, of the axial length L _{F of} a filter to be accommodated therein 5 be.

Starting from the illustrated embodiment, the holding device according to the invention 1 be modified in many ways.

So are also more locking devices 4 conceivable, for example in the form of a releasable tooth-tooth connection, as it is known from resealable cable ties or locking mechanisms similar to common belt buckle variants.

The connection of the holding device 1 on the medical device for extracorporeal blood treatment is not shown in the figures, but could be any known in the art form of connection. So the holding device 1 for example, screwed, riveted, glued or integrally molded with a housing part. A frictional / positive connection is conceivable. It is also within the scope of the invention, the holding device 1 rotatably mounted on the device for extracorporeal blood treatment, for example, about the axis of the arm 12 the filter holder 2 rotatably mounted, for example, to allow a better venting of the filter.

The filter holder 2 does not have to be made of a plastic, but could be made of any, preferably relatively rigid, and medical technology compatible material, such as a suitable metal / alloy.

Although not shown in the illustrations, the filter holder can 2 and / or the flexible / elastic band 3 additionally at least one holder for dialysis hoses, in particular for hoses of the blood hose system have.

LIST OF REFERENCE NUMBERS

1

 holder

2

 filter mount

3

 Flexible / elastic band

4

 Locking device (pin / hook)

5

 Filter (dialyzer / hemofilter / filter cartridge)

6

 holes

7

 rejuvenation

8th

 drilling

9

 Pencils)

10

 Cradle / -ausnehmung

11

 Contact surface / printing plate

12

 Connection (arm / mounting base)

13

 Recess / groove

R _H

 Radius of curvature of the contact surface / pressure plate

R _F

 Radius of curvature of the filter

B _To

 Blood supply passage

B _Ab

 Blood transfer passage

D _To

 Dialysierflüssigkeitszuführungspassage

D _Ab

 Dialysierflüssigkeitsabführungspassage

L _H

 axial extent of the holding device

L _F

 axial extent of the filter

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2007252057 A1 [0004]
• DE 102012104157 A1 [0004]
• CN 204193160 U [0004]
• WO 2011106233 A2 [0004]
• DE 69625352 T2 [0005]
• DE 69625279 [0006]

Claims (10)

Holding device ( 1 ) for attaching a filter ( 5 ), in particular a dialyzer / hemofilter or a filter cartridge, on a medical device for extracorporeal blood treatment, with - a filter holder ( 2 ), which with one, preferably for partially enclosing the filter ( 5 ) adapted, more preferably substantially trough-shaped and even more preferably dimensionally stable pressure plate ( 11 ), - a connection or fastening device ( 12 ), for mounting the filter holder ( 2 ) is adapted to the medical device for extracorporeal blood treatment, - one at a peripheral edge of the pressure plate ( 11 ) fastened or attachable flexible, preferably elastic band ( 3 ) and - a locking device arranged or formed on a peripheral strip opposite the flexible strip ( 4 ), which, while clamping the filter ( 5 ), with a free end of the flexible band ( 3 ) is engageable to the filter ( 5 ) against the pressure plate ( 11 ) to hold or push. Holding device ( 1 ) according to claim 1, characterized in that the pressure plate ( 11 ) exclusively in conjunction with the flexible band ( 3 ) a hold function on the filter ( 5 ) exercise. Holding device ( 1 ) according to claim 2, characterized in that the pressure plate ( 11 ) is curved concavely, preferably channel-shaped, at least on its filter support side, the radius of curvature (R _H ) of the pressure plate ( 11 ) is greater than the radius of curvature (R _F ) of the preferably cylindrical filter ( 5 ) and / or the circumferential extent of the printing plate ( 11 ) less than half the circumferential extent of the filter ( 5 ) is. Holding device ( 1 ) according to one of claims 1 to 3, characterized in that the maximum axial extent (L _H ) of the holding device ( 1 ) not more than 50%, preferably not more than 25%, more preferably not more than 15% of the axial extent (L _F ) of a filter to be attached thereto ( 5 ), which is adapted for the holding device. Holding device ( 1 ) according to one of claims 1 to 4, characterized in that the locking device ( 4 ) is designed as a pin or hook, which integral with the filter holder ( 2 ) and with corresponding, on the flexible band ( 3 ) provided holes ( 6 ) can be engaged. Holding device ( 1 ) according to one of claims 1 to 5, characterized in that the flexible band ( 3 ) integral, in particular in two-component injection molding, with the filter holder ( 2 ) is made. Holding device ( 1 ) according to claim 6, characterized in that the filter holder ( 2 ) at a peripheral end of the pressure plate ( 11 ) a rejuvenation ( 7 ), on which the flexible band ( 3 ) and the rejuvenation ( 7 ) one, in particular substantially perpendicular to the pressure plate ( 11 ) oriented, bore ( 8th ), which of the material of the flexible band ( 3 ) in order to achieve a positive fit between the rejuvenation ( 7 ) and the flexible band ( 3 ) to accomplish. Holding device ( 1 ) according to one of claims 1 to 5, characterized in that the flexible band ( 3 ) detachable with the filter holder ( 2 ) connected is. Holding device ( 1 ) according to claim 8, characterized in that the filter holder ( 2 ) at least one pen ( 9 ) and the flexible band ( 3 ) at least one corresponding receiving device ( 10 ) for the pen ( 9 ), so that the flexible band ( 3 ) with the pen ( 9 ) and thus in the radial direction of the pin ( 9 ) can be positively connected with this. Medical device for extracorporeal blood treatment, comprising - a filter ( 5 ) and - a holding device ( 1 ) which is adapted to filter ( 5 ) releasably to the medical device, characterized in that the holding device ( 1 ) is designed according to one of claims 1 to 9.

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