Clot catcher with screen surface and structure rising therefrom

Abstract

The present invention relates to a clot catcher (100) having a housing (200) and a main body (10) which has or is a screen surface (1) for collecting clots from blood flowing through the screen surface (1) during use of the clot catcher. The screen surface (1) has through-openings (3) through which the blood can flow. The screen surface or the main body (10) has a preferably flat structure. Alternatively, the screen surface (1) or the main body (10) spans or surrounds a space, at least partially. The clot catcher (100) has at least one structure (300) which extends or rises from the main body (10), is connected to the housing (200) and rests against the main body (10) or extends at least partially in or into the space spanned by the main body.

Description

[0001] Description

[0002] Clump catcher with sieve surface and rising structure

[0003] The present invention relates to a clot catcher according to claim 1 and a disposable medical device according to claim 14. It also relates to a blood treatment device according to claim 17 or according to the respective preambles or generic terms of these claims.

[0004] Various types of blood treatment devices are known in practice. These include, for example, devices for hemodialysis, hemofiltration, and hemodiafiltration. During extracorporeal blood treatment, the blood flows through a blood treatment unit in an extracorporeal blood circuit. In devices for hemodialysis, hemofiltration, and hemodiafiltration, the blood treatment unit is a dialyzer or filter, which, in simplified terms, is divided into a blood chamber and a dialysis fluid chamber by a semipermeable membrane. During blood treatment by hemodialysis or hemodiafiltration, the blood flows through the blood chamber, while a dialysis fluid flows through the dialysis fluid chamber.

[0005] Blood clots, should they form in extracorporeal blood circuits, particularly downstream of a venous air separation chamber, can lead to embolisms in the patient's body. Embolisms can obstruct vessels and cause ischemia. To prevent the introduction of clots into the patient's vascular system during the

[0006] To prevent dialysis, a clot catcher is routinely included as part of the blood tubing set in practice. If present, it would trap a clot in a kind of sieve and prevent it from traveling further downstream and ultimately into the patient.

[0007] One object of the present invention is to provide a further clot catcher.

[0008] Furthermore, a disposable medical device and a blood treatment device should be specified.

[0009] The problem according to the invention is solved by the clot catcher with the features of claim 1 and by the disposable medical device with the features of claim 14. It is also solved by a blood treatment device with the features of claim 17.

[0010] The present invention relates to a clot catcher comprising a housing and a base body. The clot catcher and / or the base body has a sieve surface for catching clots in or from blood flowing through the sieve surface during use of the clot catcher, or is itself such a sieve surface.

[0011] The sieve surface has openings through which blood can or must flow from an inlet on the inflow side of the clot catcher to an outlet on the outflow side of the clot catcher, e.g., to a venous catheter. The sieve surface or the base body has, or is, a structure with a main plane of extension, preferably a flat one. Alternatively, the sieve surface or the base body encloses or at least partially surrounds a space.

[0012] The clot catcher has at least one structure which extends or rises from the base body, e.g. perpendicular to it, is connected to the housing and rests against the base body and / or extends against it, or extends at least sectionally in or into the space spanned by the base body.

[0013] The present invention relates to a disposable medical device which has a clot catcher according to the invention.

[0014] A blood treatment device according to the invention has a clot catcher according to the invention and / or a disposable medical device according to the invention, or is or is connected to it.

[0015] The clot catcher discussed herein is the subject of the present invention and is therefore in accordance with the invention. The disposable medical device discussed herein is the subject of the present invention and is therefore in accordance with the invention. The blood treatment device discussed herein is the subject of the present invention and is therefore in accordance with the invention.

[0016] Inventive embodiments may, based on any one of the independent claims, incorporate one or more of the features mentioned above or below. The features mentioned herein may be the subject of any combination of inventive embodiments based on any one of the independent claims, provided that a person skilled in the art does not recognize a specific combination as technically impossible.

[0017] In all the above and all subsequent statements, the use of the expression "can be" or "can have" etc. is to be understood as synonymous with "is preferably" or "has preferably" etc. and is intended to explain embodiments according to the invention.

[0018] Whenever numerical terms are used herein, the person skilled in the art understands them to indicate a lower numerical limit. Provided this does not lead to any contradiction apparent to the person skilled in the art, the person skilled in the art therefore always interprets the term "a" or "a" as meaning "at least one" or "at least one." This understanding is encompassed by the present invention, as is the interpretation that a numerical term such as "a" can alternatively be meant as "exactly one," wherever this is technically feasible to the person skilled in the art. Both are encompassed by the present invention and apply to all numerical terms used herein.

[0019] Whenever spatial references such as "above", "below", "left", or "right" are made herein, those skilled in the art understand this to mean the arrangement in the figures attached herein and / or in the state of use. "Below" is closer to the Earth's center or the lower edge of the figure than "above". Advantageous further developments of the present invention are the subject of dependent claims and embodiments.

[0020] Whenever a particular embodiment is mentioned herein, it refers to an exemplary embodiment according to the invention, based on one of the independent claims, which is not to be understood as limiting.

[0021] If it is disclosed herein that the object according to the invention has one or more features in a particular embodiment, it is also disclosed herein that the object according to the invention expressly does not have precisely this or these features in other embodiments, which are also according to the invention, e.g., in the sense of a disclaimer. For each embodiment mentioned herein, the opposite embodiment, for example formulated as a negation, is therefore also disclosed.

[0022] Embodiments as disclosed herein further develop the invention as defined by the independent claims.

[0023] The clot catcher and / or the base body according to the invention has a sieve surface or a clot catcher surface which is suitable and provided for collecting clots of a fluid flowing through the sieve surface, in particular blood.

[0024] The following applies: A fluid flowing through the clot catcher enters the clot catcher – completely or partially – on an inlet side, flows through the sieve surface, and exits the clot catcher on an outlet side. According to the invention, clots are understood to be, for example, thrombi, solid impurities, and the like.

[0025] The term “fluid”, as used herein, includes fluids of all kinds, in particular priming or rinsing fluid, blood, but also others.

[0026] The clot catcher is arranged essentially vertically during or for its use - preferably with respect to the main extent of the sieve surface and / or the base body - as shown, for example, in Fig. 1.

[0027] The term "essentially perpendicular," as used herein, means that the inclination of the clot catcher to the vertical may not exceed approximately 15° in any direction, or that a maximum inclination of ±15° is particularly preferred. An inclination of less than ±15° is also preferred.

[0028] The clot catcher can be positioned at any angle or inclination relative to the vertical, which is oriented towards the Earth's center.

[0029] The sieve surface of the base body has openings through which the fluid can flow from the inlet to the outlet. These openings provide a mechanical filtering or sieving effect. The dimensions of the openings or the mesh size of the sieve surface can be selected such that clots are retained on the inlet side due to their size.

[0030] The openings of the sieve surface together form a total passage area of ​​the sieve surface.

[0031] The base body can be manufactured separately from the housing section of the clot catcher that receives it. It can be designed to be inserted into the housing and thus be separate from or detachable from the housing.

[0032] The structure is preferably located on the outflow side of the sieve surface or the base body, or in relation to it, and is particularly preferably located only on the outflow side.

[0033] The structure preferably has a longitudinal extent that is less than, or the maximum longitudinal extent of, the sieve area and / or the base body. If the base body is round or circular, its longitudinal extent can be its diameter. The longitudinal extent can be in a top-bottom direction.

[0034] A space enclosed in its cross-section, which may be, for example, a channel, a pipe, or the like, in whose formation the structure is involved – perhaps together with a section of the housing containing the basic body (e.g., its wall) – comes into play in many

[0035] The design forms only come into being when the clot catcher is in an assembled or operational state, i.e., when the base body is inserted into the housing. In some embodiments of the invention

[0036] The sieve surface or base body of a clot catcher is a disc-shaped body or has one.

[0037] The term ‘disc-shaped’ as used herein means that the sieve surface is designed – preferably substantially or completely – in the shape of a disc.

[0038] The disc shape of the sieve surface or the base body can be uneven and / or wavy, curved, or the like in any embodiment according to the invention. Alternatively, it can be designed to be flat – in the sense of lying in a plane.

[0039] The disc shape optionally specifies a shape which is significantly larger in a first dimension (the main extent) than in a direction perpendicular to it.

[0040] In some versions, the sieve surface or base body is a cone-shaped or frustoconical section, or has one.

[0041] In some embodiments, the structure has a longitudinal extension in a direction that runs from top to bottom relative to the clot catcher's state of use. It can therefore be an elongated body, or at least have one that extends lengthwise from top to bottom.

[0042] In some embodiments, the structure has or is at least one wall, rib, or flow guide. In some embodiments, the structure has or consists of at least or exactly two such walls, ribs, or flow guides.

[0043] In some versions, the structure has two walls which run parallel or essentially parallel.

[0044] In some embodiments, the structure is a tube that is longitudinally permeable to blood, or includes one.

[0045] In certain designs, the structure is one-piece, like the aforementioned tube.

[0046] The structure can be connected, e.g., at one end or end region thereof, to a housing section or a line extending out of the clot catcher, i.e., on the outflow side of the clot catcher, e.g., to a venous line, directly or indirectly in fluid connection, for example by gluing, laser welding, welding, snapping, locking, integral manufacturing, etc.

[0047] In some embodiments, the structure is the only way for a fluid, such as priming fluid or blood, to leave the clot catcher from the outflow side downstream.

[0048] In some embodiments, the structure is free of openings or, compared to the base body or the sieve surface, has fewer openings per unit area or a smaller through-area formed by openings per unit area. If the structure in some embodiments is multi-part or has multiple walls, the base body between the multiple parts, especially walls, is free of openings or, compared to the base body or the sieve surface, has fewer openings per unit area or a smaller through-area formed by openings per unit area.

[0049] In some embodiments, the base body or housing of the clot catcher has in its upper area a flow deflection device that extends to the upper edge of the structure or partially into it, or into the space formed or co-formed by it.

[0050] This space may have an inlet opening at its upper end, which may be formed by an upper area of ​​the structure and which allows fluid that has already flowed through the sieve surface to flow into the space, in the formation of which the structure is at least involved, in order to leave the clot catcher again in the direction of, for example, a venous line.

[0051] In some embodiments, the structure has at least one opening in a lower section (e.g., in its lower 10%, 20%, or 30% of its total length) for the entry of blood into a space enclosed by the structure, either alone or as one of several components involved therein (such as walls belonging to the casing, etc.), e.g., the channel disclosed herein, from the side, i.e., e.g., in a radial direction. In some embodiments, there is at least one opening between a lower end of the structure and the casing for the entry of blood into a space enclosed by the structure, either alone or as one of several components involved therein (such as walls belonging to the casing, etc.), e.g., the channel disclosed herein, from the side, i.e., e.g., in a radial direction.

[0052] In some designs, the at least one opening for blood entry is not a through-hole. It may differ from the latter in the size and / or narrowest extent of its flowable surface.

[0053] In some embodiments, the opening area of ​​the at least one passage can have an opening area that is 200%, 300%, 400% or more of the opening area of ​​a passage opening, e.g. the smallest existing passage opening, the largest existing passage opening or the average passage opening.

[0054] In some embodiments, the narrowest diameter (length, width or diameter) of the at least one passage may be 200%, 300%, 400% or more of the diameter (length, width or diameter) of a passage opening, e.g. the smallest existing passage opening, the largest existing passage opening or the average passage opening.

[0055] In certain forms of execution, at least one

[0056] The passage must be designed to allow clots to pass through, which would otherwise cause blockages.

[0057] Through openings or sieve surfaces, which could no longer pass through due to their size, it would be quite possible to allow them to pass through at least one opening, if one wanted to let them flow through the opening.

[0058] In some embodiments, all the openings of the sieve surface are arranged on – in particular concentric – circles or circular segments on the base body. An exemplary arrangement is shown below in Fig. 1a.

[0059] Alternatively, a large number of passage openings are arranged on - especially concentric - circles.

[0060] In some versions, all or only some of the openings are arranged radially, with reference to a center point of the clot catcher or sieve surface.

[0061] The term "center point" refers to a center point or a point in a central area of ​​the disc-shaped sieve surface and / or the base body. This center point can correspond to the centroid or geometric center of the sieve surface and / or the clot catcher and / or to the center point of a circular sieve surface and / or the clot catcher.

[0062] In contrast to a concentric arrangement of the openings, the openings are arranged in a "radial" arrangement such that they extend radially from the center of the screen surface or clot catcher, particularly in one or more planes parallel to a principal plane of extension of the screen surface. The openings can be arranged at equal intervals across the screen surface. Alternatively, the openings can be offset from one another, as shown, for example, in Fig. 1a.

[0063] The openings can be arranged symmetrically on the sieve surface, relative to the center point of the sieve surface and / or the clot catcher. However, they can also be arranged asymmetrically on the sieve surface.

[0064] An example of such an arrangement of the passage openings is shown in Fig. 1a.

[0065] In some designs, at least one section of the sieve surface or base body has no openings, or a smaller number of openings compared to other areas of the sieve surface. The other areas may include a representative area, such as an area with an average number and / or average size of openings.

[0066] In certain embodiments, the structure has no through-openings and / or no through-openings as are characteristic of the sieve surface - or has a smaller number of through-openings compared to other areas of the sieve surface.

[0067] The opening(s) can have any suitable geometric shape. They can, for example, be square, round, and / or elliptical, or the like. A number of openings can, for example, have sharp edges on at least one of the two sides of the sieve surface (inlet side and outlet side).

[0068] Alternatively or additionally, a number of openings on at least one side of the sieve surface can be rounded or deburred.

[0069] The openings can be rounded on both sides.

[0070] The length and / or width of the openings can be varied, for example, depending on the radial distance or from a central area towards the edge of the sieve surface. For instance, the length and / or width of the openings can also increase with increasing radial distance towards the outside.

[0071] The length and / or width of the passage openings can be changed, for example, depending on the angular orientation.

[0072] An “angle” may be an angle of a circular segment between a straight line through the center point or a point of a central area of ​​the clot catcher or sieve surface and another straight line through the center point of the sieve surface along the circular arc of the clot catcher or sieve surface.

[0073] The clot catcher can be made, at least in sections, from or incorporate a hemocompatible base material. The clot catcher can be made entirely from a hemocompatible base material.

[0074] Examples of suitable hemocompatible base materials include, but are not limited to, PVP.

[0075] (Polyvinylpyrrolidone), which is preferably particularly hemocompatible, as well as PP (polypropylene).

[0076] In some designs, the clot catcher is made of or incorporates a base material. Suitable base materials include, but are not limited to, polypropylene, polyethylene, polycarbonate, polyvinyl chloride (PVC), polyamide (PA), and the like.

[0077] The base material is preferably coated with one or more hemocompatible materials.

[0078] The clot catcher, its base body and / or structure can be an injection molded component or an injection molded element.

[0079] The base body and / or structure can be detachably connected to the housing. For example, it can be snapped or locked to the housing, or something similar.

[0080] Alternatively, the base body and / or the structure can be permanently connected to the housing. For example, they can be welded or glued to the housing, or similar methods.

[0081] The base body can be integrated into a housing in such a way that it and / or its sieve surface separate the inlet area, or the inlet side, of the housing from the outlet area, or the outlet side.

[0082] In some embodiments, the disposable medical device according to the invention is a blood cassette or part thereof, or includes one or more such.

[0083] A blood cassette, as defined in the present invention, is described, for example, in DE 10 2009 018 664 Al, to whose relevant disclosures reference is hereby made in full.

[0084] In some versions, the disposable medical device is a blood tubing set or has one.

[0085] The medical disposable device can be a disposable component or single-use item. It can be made of a plastic material. It is used in a blood treatment procedure.

[0086] The term "blood circulation" as used herein refers to a tubing system which, in the form of an extracorporeal blood circulation, is suitable for use in the extracorporeal treatment of a patient's blood and is typically used for this purpose.

[0087] Both the disposable medical device and the blood circulation system may be intended for use in or on a blood treatment device.

[0088] In some versions, the blood treatment device is called a dialysis device, hemodialysis device, hemofiltration device or hemodiafiltration device, especially as a device for acute, chronic

[0089] designed for renal replacement therapy or for continuous renal replacement therapy (CRRT).

[0090] In some embodiments, at least one passage is arranged on or through the upper surface of the base body, e.g., the top surface of the truncated cone. This serves in particular to release air during the priming process. The passage may differ geometrically from the through-openings. Passages may also be provided individually. They may, for example, be located at a highest point of the upper or top surface. They may be provided along the circumference of the upper or top surface, preferably only there.

[0091] Some or all embodiments according to the invention may have one, several or all of the advantages mentioned above and / or below.

[0092] Typically, the surface area of ​​a clot catcher's sieve is significantly larger than the cross-sectional area of ​​the blood-carrying tubing, due to its design. The flow velocities before and after the sieve are considerably lower than in the blood tubing itself, due to its placement within the chamber. An air bubble remains behind the sieve after the flushing process. This bubble cannot usually be mobilized by pressure pulses or higher flow rates. Should such air bubbles be carried along during treatment, potentially due to altered flow conditions, this generally triggers air alarms and, consequently, the interruption of the ongoing dialysis treatment. The patient must then be disconnected from the dialysis system, and a complex air removal procedure must be performed. An air bubble remaining on the sieve surface may also promote coagulation activation.These weaknesses of the prior art can be advantageously overcome in certain implementations. This is particularly possible through the design of the clot catcher and, if applicable, the surrounding chamber or housing, as disclosed herein. This design allows for reliable, complete filling of the clot catcher housing, which, apart from the inlet and outlet, can be a closed chamber, and may even achieve locally similar flow velocities to those in a blood tubing. The formation of air bubbles during normal priming can therefore be prevented or counteracted. Air alarms can be avoided, as can interruptions of the treatment session caused by them.

[0093] Special designs of the flow-guiding device of the clot catcher described herein can also counteract sedimentation of the blood during treatment.

[0094] The protrusion of the structure or the formation of the flow path referred to herein as a channel can also advantageously eliminate the need for a support structure, a grid or the like for the mechanical support of the sieve surface or the clot catcher, as is known in practice for clot catchers.

[0095] The present invention is described below by way of example only, with reference to the accompanying figures. In these figures, identical reference numerals denote identical or similar components. The following applies:

[0096] Fig. 1 shows the housing of a clot catcher according to the invention in a first embodiment with a view into the opened or cut housing;

[0097] Fig. 1a shows the base body of the clot catcher, the housing of which is shown in Fig. 1, in a rear view;

[0098] Fig. 2 shows the clot catcher of a second embodiment with a view of its opened or cut-away housing with the base body inserted or arranged therein;

[0099] Fig. 2a shows the base body of the clot catcher of Fig. 2, taken from the housing of Fig. 2, in a front view;

[0100] Fig. 3 shows a flow pattern inside a clot catcher from Fig. 1 to Fig. 2a;

[0101] Fig 4 shows a clot catcher in a third embodiment;

[0102] Fig. 4a shows the clot catcher of Fig. 4 with the flow lines drawn in;

[0103] Fig. 5 shows a clot catcher in a fourth embodiment; and Fig. 5a shows the clot catcher of Fig. 5 in a sectional view.

[0104] Fig. 1 shows the housing 200 of a clot catcher 100 according to a first embodiment, with a view into the open housing 200 and into the outflow side of the clot catcher 100. The housing 200 is shown in section, as is the indicated blood cassette 500 as an example of a disposable medical device in which the clot catcher 100 is contained or of which it is a part during use of the disposable medical device. The base body 10 belonging to the clot catcher 100 is not inserted into the housing 200 but is shown separately in Fig. 1a.

[0105] Fig. 1a, which corresponds to Fig. 1, shows a base body 10 of the clot catcher 100, viewed from its rear side, which, in the assembled or operational state of the clot catcher 100, faces the inlet side of the clot catcher 100. Figs. 1 and 1a are discussed simultaneously below.

[0106] The base body 10 of the clot catcher 100, Fig. a1a, has a sieve surface 1 embedded or formed therein.

[0107] A structure 300, Fig. 1, extends, preferably integrally manufactured with the housing 200 (alternatively: connected), from its front side away from the base body 10.

[0108] The sieve surface 1 has openings 3, preferably arranged on concentric partial circles, although this arrangement is optional. The openings 3 of the sieve surface 1 are optionally offset from one another on circles – partial circles or other arrangements are also possible. This offsetting can optionally create an overlap in the radial direction.

[0109] In section 5 of the basic body 10, optionally no through-openings are provided. Alternatively, section 5 has fewer through-openings or an area per unit area than the sieve area 1 or a representative section thereof.

[0110] In the example of Fig. 1a, the base body 10 is disk-shaped, while the structure 300, Fig. 1, is designed – optionally here – as two longitudinally extending (in a vertical direction in Fig. 1) strips or flow guides 301, 303. When the base body 10 of Fig. 1a and the housing 200 of Fig. 1 are joined together (hereafter referred to as the assembly state or operating state), the section 5, then located between the two flow guides 301, 303, together with the two flow guides 301, 303 and a section 5' located between them, which may be part of the wall of the housing 200, forms a hollow body or a conduit for a fluid.

[0111] In other words, the flow guide devices 301, 303 can optionally form a channel together with the section 5' lying between them and the section 5 abutting them in the assembled state. The channel can be largely closed in the assembled state, for example by having no or hardly any openings 3, so that the liquid preferably only passes through at the upper end of the

[0112] Fluid can flow into the channel through an inlet opening 9 and flow out of the channel at its end, preferably directly into the venous line 15 connected to the clot catcher 100 (see Fig. 4) or into the adjacent venous tube (not shown). The channel in its assembled state can thus be a structure closed in its circumference.

[0113] The flow guide devices 301, 303 optionally run parallel to each other here.

[0114] The flow guide devices 301, 303 can extend over substantially the entire diameter of the sieve surface 1 or the base body 10, or at least over 80%, 90% or each more of the diameter or extent in the height of the sieve surface 1 or the base body 10.

[0115] Optionally, a flow-dividing device or flow-deflection device 7, also extending from the housing 200, is provided, which in some embodiments can be understood as a deflecting baffle. It is optionally arranged to come to rest in an upper region of the base body 10 when assembled, optionally such that it divides a fluid flow, or a portion thereof, entering the clot catcher 100 from above between the flow guides 301, 303, into two partial flows. These partial flows then find their way downwards between the flow guides 301, 303 through the inlet opening 9, to the left and right of the flow-deflection device 7. The flow-deflection device 7 is shown here by way of example as a structure tapering towards one end (here the lower end), which may have a wedge shape.

[0116] In the example of Fig. 1, the flow deflection device 7 projects with a section between the flow guide devices 301, 303, into the inlet opening 9 at least into a region where the flow guide devices 301, 303 begin, while the flow deflection device 7 otherwise lies outside or above the flow guide devices 301, 303 and the inlet opening 9.

[0117] This section of the flow deflection device 7 can therefore, in the assembled state, project into the upper end of the channel or, in its downward extension, at least terminate in the region of the upper end of the channel. The position designations "upper end" and "lower end" above and below preferably refer to an orientation of the clot catcher 100 during its use. They apply in any case to the representations in the figures.

[0118] The flow deflection device 7 can be provided to prevent local vortex formation when the two partial flows meet. The two partial flows are directed in a common direction towards the lower end of the channel.

[0119] The aforementioned channel, whose cross-sectional shape can be arbitrary (round, rectangular, etc.), promotes a high flow velocity of the blood entering it as soon as it enters the channel. This high downward flow velocity, generated in its upper region, facilitates the entrainment of any air bubbles present, which are predominantly found there.

[0120] In its lower region, the channel leads - preferably directly - into the venous tube (not shown) or the venous conduit 15, see Fig. 4, or opens into it.

[0121] One or more optional lateral passages 13 allow flow from beyond the flow guides 301, 303 into a lower region of section 5 or the formed channel. They can advantageously serve to prevent blood sedimentation in the clot collector 100 during treatment on the outflow side of the clot collector 100.

[0122] The flow guide devices 301, 303, like the optional flow deflection device 7, can be molded onto the housing 200 as an integral part in any embodiment. Alternatively, as shown in Figures 2 and 2a, they can be molded onto the base body 10 of the clot catcher 100. Alternatively, they can also be connected to the housing 200 or the base body 10 by other means.

[0123] Fig. 2 shows the clot catcher 100 of a second embodiment with the housing 200 open or cut away. The base body 10 is inserted into the housing 200 and shown from the rear. The view is of the inlet side of the clot catcher 100. Fig. 2a shows the base body of the clot catcher 100 of Fig. 2 in a front view, taken from the housing 200 of Fig. 2. The view is of the outlet side of the clot catcher 100.

[0124] Figures 2 and 2a show that the base body 10 can also be the one that carries the structure 300, e.g. the flow guide devices 301, 303, and / or the optional flow deflection device 7, or can be manufactured with it, e.g. integrally.

[0125] Fig. 3 shows a flow pattern within a clot collector 100 from Figs. 1 to 2a. The desired flow pattern can be seen, which at the upper end of the channel, coming from the left and right of the optional flow deflection device 7, results in a common downward flow that can leave the clot collector there at a velocity higher than that at which the remaining blood flowing into the clot collector 100 passes through the sieve surface 1.

[0126] Figure 3 also shows that blood, instead of passing through the inflow opening 9, can find its way into the venous system through the passages 13. The passages 13 thus allow this blood to enter the channel beyond the inflow opening 9 and then into the venous system, or to enter the latter directly.

[0127] Fig. 4 shows a clot catcher 100 in a third embodiment.

[0128] Unlike the implementation forms of the previous ones

[0129] In the figures, the base body 10 of the clot catcher 100 in Fig. 4 does not have a planar or substantially planar shape. Rather, it is frustoconical (alternatively: conical), or at least has a lateral surface of a frustoconical shape. Alternatively, it could be semicircular, cuboidal, or differ from a planar shape in some other way. The same applies here to its sieve surface 1, which optionally also has the shape of the lateral surface of a frustoconical shape.

[0130] Inside the base body 10, the structure 300 extends similarly to that described in Figs. 1 and 1a as a tube in a top-bottom direction. The channel described in Figs. 1 and 1a is formed here by the structure 300 alone, i.e., without the contribution of the housing 200 as part of its outer surface.

[0131] As shown in Fig. 1 and Fig. 1a, the structure 300 has no or almost no through-openings 3. The flow deflection device 7 known from Fig. 1a is also optionally provided here, as are the optional through-openings 13.

[0132] Fig. 4a shows the clot catcher 100 of Fig. 4 with the flow lines drawn in.

[0133] Fig. 5 shows a clot catcher 100 in a fourth design form in slight perspective and only partially shown.

[0134] Analogous to the embodiment of Fig. 4a and Fig. 4b, the clot catcher 100 of Fig. 5 also has a truncated cone shape, wherein its sieve surface 1 is arranged on the lateral surface of the truncated cone, and optionally only there, but in other embodiments also on its top surface.

[0135] Reference is made to the description of the truncated cone shape in Fig. 4 to avoid repetition. Everything stated there regarding this shape also applies—without limitation—to the embodiment shown in Fig. 5. The reverse is also optionally true.

[0136] The following discussion will focus solely on the differences compared to Fig. 4.

[0137] The outer surface of the clot catcher 100 has, analogous to the embodiment shown in Fig. 4, a plurality of through-openings 3. In contrast to the example in Fig. 4, in which the through-openings 3 are arranged vertically, the through-openings 3 in the example in Fig. 5 are optionally arranged horizontally. The arrangements of the through-openings 3 shown in the figures are purely exemplary and are not to be understood as limiting.

[0138] At least one passage 13 is optionally arranged on or through the upper surface of the truncated cone, also referred to herein as the top surface. This serves in particular to remove air bubbles located behind the sieve from the chamber when the flow direction is reversed - i.e., from bottom to top - during the connection of the patient to the blood tubing system and can optionally also be arranged at another position on the clot catcher 100.

[0139] Fig. 5a shows the clot catcher of Fig. 5 in a longitudinal section. In this view, the structure 300 can optionally be seen as a tube in a top-bottom direction, in particular as a cylindrical tube. The channel described for Figs. 1 and 1a is optionally also formed here by the structure 300 alone, i.e., without the housing 200 contributing as part of its outer surface.

[0140] Analogous to the embodiment shown in Fig. 4, the structure 300, which extends into the interior of the truncated cone, has no through-openings 3, or no such openings in a relevant number or with a relevant through-area. The flow deflection device 7 known from Figs. 1 and 1a is also optionally provided here.

[0141] The flow deflection device 7 optionally extends at least section by section in a longitudinal direction of the structure 300 into the cavity formed by the structure 300. This can also be the case in any other embodiment.

[0142] Also visible is an optional ring-shaped recess, shown here as an example on the bottom side, in which the lower edge of the lateral surface or the sieve surface 1 or the base body 10 in the housing 200 is received in a space between housing 200 and structure 300.

[0143] The lower edge of the clot catcher 100 can, as in any other embodiment, have a design that serves to wedge and / or lock it with at least one inner section, for example on the inside, in or on the lower part of the inner wall or the like, of the housing 200, or it can be prepared for such a connection. A corresponding design of the housing 200, in particular on its inside, for example the provision of a recess, a locking lug or the like, is also encompassed by the present invention.

[0144] The arrangement of the passage 13 can also be seen in the sectional view. The present invention is not limited to the embodiments described above. These serve only for illustration.

[0145] Reference character list

[0146] Sieve surface

[0147] 3 passage openings

[0148] Section 5 without passage openings or with a small number of them

[0149] 5' section of the casing

[0150] 7 Flow deflection device

[0151] 9 Inlet opening

[0152] 10 basic shapes

[0153] 13 passages

[0154] 15 venous lines

[0155] 100 clot catchers

[0156] 200 cases

[0157] 300 Structure rising from the base body; in which from

[0158] Basic structure arranged in a taut space

[0159] 301, 303 Flow guide devices

[0160] 500 blood cassettes

Claims

Claims 1. Clump catcher (100) with a housing (200) and a base body (10) which has a sieve surface (1) for For catching clots in blood flowing through the sieve surface (1) during use of the clot catcher, wherein the sieve surface (1) has openings (3) through which the blood can flow, wherein the sieve surface (1) or the base body (10) is or has a, preferably flat, structure with a principal extension plane, or wherein the sieve surface (1) or the base body (10) spans or at least partially surrounds a space; wherein the clot catcher (100) has at least one structure (300) which extends or rises from the base body (10), is connected to the housing (200) and abuts the base body (10), or extends at least sectionally into or over the space spanned by the base body (10).

2. Coagulation catcher (100) according to claim 1, wherein the sieve surface (1) or the base body (10) is or has a disc-shaped body.

3. Coagulation catcher (100) according to claim 1, wherein the sieve surface (1) or the base body (10) is or has a conical or frustoconical body.

4. Clot catcher (100) according to one of the preceding claims, wherein the structure (300) has a longitudinal extension in a direction extending from top to bottom with respect to the state of use of the clot catcher (100).

5. Coagulation catcher (100) according to any of the preceding claims, wherein the structure (300) is or comprises at least a wall, strip or flow guide device (301, 302).

6. Coagulation catcher (100) according to claim 5, wherein the structure (300) is or has at least or exactly two such walls, ribs or flow guide devices (301, 302).

7. Clot catcher (100) according to one of the preceding claims, wherein the structure (300) has two walls which are parallel or substantially parallel.

8. Clot catcher (100) according to any of the preceding claims, wherein the structure (300) is or comprises a tube that is permeable to blood in the longitudinal direction.

9. Coagulation catcher (100) according to any of the preceding claims, wherein the structure (300) is free of passage openings (3) or, compared to the base body or the sieve surface (1), has fewer passage openings (3) per unit area or less passage area formed by passage openings (3) per unit area.

10. Coagulation catcher (100) according to one of the preceding claims, wherein, if the structure (300) is multi-part or has multiple walls, the base body (10) between the multiple parts, in particular walls, is free of passage openings (3) or, compared to the base body or the sieve surface (1), has fewer passage openings (3) per unit area or less passage area formed by passage openings (3) per unit area.

11. Clot catcher (100) according to one of the preceding claims, wherein the base body (10) or the section receiving the base body (10) of the The housing (200) of the clot catcher (100) has, preferably in an upper area of ​​the section, a flow deflection device (7) extending towards or into the upper edge of the structure (300) or the space formed or co-formed by it, in a section or in a section.

12. Clot catcher (100) according to one of the preceding claims, wherein the structure (300) has in a lower section thereof at least one passage (13) for the entry of blood into a space circumscribed by the structure (300) from the side.

13. Clot catcher (100) according to one of the preceding claims, wherein at least one passage (13) for the entry of blood into the structure (300) or into a space enclosed in its circumference, which is enclosed by the structure (300) is provided between a lower end of the structure (300) and the housing (200). formed or in whose training the structure (300) is involved, is provided for.

14. Disposable medical device comprising a clot catcher (100) according to any one of claims 1 to 13.

15. Disposable medical device, wherein the disposable medical device is or comprises a blood cassette.

16. Disposable medical device, wherein the disposable medical device is or includes a blood tubing set.

17. Blood treatment device comprising a clot catcher (100) according to any one of claims 1 to 13 and / or a disposable medical device according to any one of claims 14 to 16.

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