Medical treatment system

Abstract

Medical treatment system with at least one device (1) for providing a medical fluid for an extracorporeal dialysis device or a peritoneal dialysis device, with a plug unit (A) for connection to a socket unit of the dialysis device or device for peritoneal dialysis (2), wherein the plug unit (A) has means (86) for signaling two operating states, which are designed such that the means (86) for signaling two operating states are susceptible to damage or destruction when the plug unit (A) is connected to the socket unit of the dialysis device or device for peritoneal dialysis (2), wherein the first operating state is the state before the plug unit (A) is connected to the socket unit (B), when the means are intact, and the second operating state is the state after the plug unit (A) is connected to the socket unit (B), when the means are damaged or destroyed, and at least one extracorporeal dialysis device or peritoneal dialysis device (2), with a socket unit (B) for connecting the plug unit of the device (1) for supplying a medical fluid to the dialysis device or device for peritoneal dialysis (2), wherein the socket unit (B) comprises means (88) for damaging or destroying the means for signaling two operating states of the device (1) for supplying a medical fluid, which are configured such that the means for signaling two operating states are damaged or destroyed when the plug unit of the device for supplying a medical fluid is connected to the socket unit (B).

Description

[0001] The invention relates to a medical treatment system comprising at least one device for supplying a medical fluid to an extracorporeal dialysis device or a peritoneal dialysis device, and at least one extracorporeal dialysis device or peritoneal dialysis device. Furthermore, the invention relates to a medical treatment system comprising at least one device for supplying a medical fluid to an extracorporeal dialysis device or a peritoneal dialysis device, and at least one device for filling the device for supplying the medical fluid.

[0002] A variety of connectors are available for connecting external components to medical devices. Access to the medical devices is generally achieved via plugs that are inserted into corresponding sockets on the medical devices. Therefore, the medical devices, hereinafter referred to as medical equipment, have a corresponding socket unit, while the external components have a plug unit.

[0003] Blood treatment devices are used to treat patients with kidney disease, including the well-known extracorporeal dialysis machines and peritoneal dialysis machines. The provision of medical treatment fluids is necessary for blood purification. These include, for example, dialysis fluid and replacement fluid. In so-called automatic peritoneal dialysis (APD) or acute dialysis, the medical treatment fluids are processed automatically in the blood treatment devices.

[0004] The treatment fluids are provided in fluid reservoirs connected to the treatment devices. Fresh dialysis fluid is pumped from the fluid reservoir into the blood treatment device, and used fluid is pumped from the treatment device into the fluid reservoir. The fluid reservoir may already contain a concentrate that is diluted with water. In this case, the fluid reservoir only needs to be filled with water. Therefore, water is also considered a medical fluid in this context. It is also possible for several fluid reservoirs to be connected to a single blood treatment device if a ready-to-use treatment fluid is prepared within the device by mixing several fluids.The connection of the fluid reservoirs to the blood treatment devices is again made using a plug unit, which is inserted into a socket unit of the blood treatment device.

[0005] Devices for filling dialysis fluid supply devices are known, to which the dialysis fluid supply devices can be connected. For this purpose, the filling devices in turn have a socket unit that can be connected to the plug unit of the dialysis fluid supply device.

[0006] A device for supplying a treatment fluid is known, for example, from EP 0 575 970 A2. The known device for supplying dialysis fluid comprises a bag for receiving the fluid, to which a hose is attached, the free end of which is connected to a plug. The dialysis device has a socket into which the plug is inserted. The plug and socket allow two flow connections to be established, enabling fresh dialysis fluid to be drawn from the bag into the dialysis device and used dialysis fluid back into the bag.

[0007] When filling the device for dispensing medical fluids, it must be ensured that reuse of the device for dispensing medical fluids is impossible.

[0008] EP 0 476 089 B1 describes a device for rinsing tissue with a module for receiving a single-use cassette. The module has an undercut recess in which a hook-shaped projection of the cassette sits when the cassette is inserted into the module. When the cassette is pulled out of the module, the hook-shaped projection breaks off. EP 0 947 206 discloses a plug unit of a device for supplying dialysis fluid, which has a barcode.

[0009] US Patent 2005 / 0224405 A1 describes an extracorporeal blood treatment device that has a front panel with a socket. The socket is used to connect a plug, with the socket and plug forming a plug connection. The socket is connected to a pressure sensor, while the plug is connected to a line that is attached to a drip chamber of an extracorporeal blood tubing system. The lumen of the socket is sealed with a sealing element (diaphragm). When the plug is connected to the socket, the sealing element opens, creating a fluid connection between the drip chamber and the pressure sensor for measuring the pressure.

[0010] From DE 20 2004 015 957 U1, a sleeve for securing two connectors to be joined together, e.g., Luer-lock connectors, is known. The sleeve, as part of the connector, can ensure a tight seal between the two connectors and can be used as a tamper-evident seal. If the sleeve is destroyed, it can be concluded that the connectors of the connection have been separated.

[0011] The invention is based on the objective of increasing the safety in the supply of medical fluids, especially dialysis fluid, to blood treatment devices, in particular extracorporeal dialysis devices or devices for peritoneal dialysis.

[0012] The solution to this problem is achieved according to the invention with the features of the independent claims. Advantageous embodiments of the invention are the subject of the dependent claims.

[0013] The blood treatment device according to the invention, or the device according to the invention for filling the device for dispensing medical fluids, has a socket unit, while the device according to the invention for dispensing medical fluids has a plug unit. The socket unit and the plug unit are characterized in that a secure connection between the device for dispensing medical fluids and the blood treatment device on the one hand, or between the device for filling the device for dispensing medical fluids and the blood treatment device on the other, can be easily established with both units.

[0014] The plug unit of the device according to the invention for supplying a medical fluid has means for signaling two operating states, while the socket unit of the medical treatment device according to the invention has means for damaging or destroying the means for signaling two operating states, and the means for damaging or destroying the means for signaling two operating states are designed such that the means for signaling two operating states are damaged or destroyed when the plug unit of the device for supplying a medical fluid is connected to the socket unit of the medical treatment device.The first operating state is thus the state before the plug unit is connected to the socket unit, when the means are intact, and the second operating state is the state after the plug unit is connected to the socket unit, when the means are damaged or destroyed. The means for signaling the two operating states can also signal further information. Crucially, however, these means must at least indicate the two operating states. In a preferred embodiment, these means are formed by an information carrier.

[0015] The means for signaling the two operating states do not need to be completely destroyed. It is sufficient if these means, provided they have a function, become unusable, for example, if the information on the data carrier is no longer readable.

[0016] After the device has been used once, as intended, to dispense a medical fluid, i.e., once the fluid has been supplied to the treatment device, the device cannot be refilled with fluid. This precludes reuse of the device.

[0017] The filling of an already used device for providing a medical fluid is excluded with the device according to the invention for filling the device for providing a medical fluid, which has a socket unit for connecting the plug unit of the device for providing a medical fluid.

[0018] The filling device includes means for detecting the reuse of the medical fluid supply device, which are designed to detect whether the means for signaling two operating states of the plug unit of the medical fluid supply device are intact or damaged or destroyed.

[0019] The basic principle of the invention is to prevent the reuse of the device for dispensing a medical fluid by preventing the device from being filled with a medical fluid in the first place. This prevents devices for dispensing medical fluids that have already been used from entering circulation.

[0020] In a preferred embodiment of the invention, the means for signaling two operating states comprise a planar information carrier that carries machine-readable information about characteristic properties of the medical fluid, for example, the composition of the fluid or the amount of fluid. The information carrier thus serves not only to provide machine-readable information but also to detect the reuse of the device. The information on the carrier can be, for example, a matrix code or any other known machine-readable code.

[0021] Another preferred embodiment provides that the information carrier is applied to a section of the plug unit of the device for supplying a medical fluid, which is provided with a recess, wherein the means for damaging or destroying the planar information carrier of the treatment device have a projecting projection which engages in the recess when the plug unit of the device for supplying a medical fluid is connected to the socket unit of the treatment device, so that the information carrier is damaged or destroyed and thus becomes unusable.

[0022] In a particularly preferred embodiment, the recess is a groove, open at least at one end, in the section of the plug unit, which runs parallel to the axis of the plug unit in the direction of which the plug unit is inserted into the socket unit of the treatment device. When the plug unit is inserted into the socket unit, the projecting projection is pushed into the groove, thereby reliably destroying the flat information carrier without requiring significant force.

[0023] The means for detecting the reuse of the device for dispensing a medical fluid preferably comprise a unit for reading information on the planar information carrier and an evaluation unit configured to generate a reuse signal if, after the destruction of the information carrier, the reading of information is faulty. Faulty reading is also understood to mean that the information cannot be read at all, which is likely to be the case after destruction or damage of the information carrier.

[0024] If the device for filling the device for dispensing a medical fluid already has a reader to, for example, read characteristic information about the fluid from a machine-readable code, the means for reuse detection can be implemented without further technical effort.

[0025] Another particularly preferred embodiment of the filling device provides a control unit for controlling the filling process, which is designed in such a way that the initiation of the filling process is prevented when the evaluation unit generates the signal indicating reuse.

[0026] The socket unit of the filling device and the plug unit of the device for dispensing a medical fluid are preferably designed such that the formation of a flow connection between the socket unit and the plug unit is prevented. However, it is also possible to prevent the flow of the medical fluid from the filling device to the device for dispensing the fluid.

[0027] To establish the flow connection, the socket unit has at least one connection piece, while the plug unit has at least one connector, whereby a fluid-tight connection can be established when the connection piece is attached to the connector. In a preferred embodiment, the socket unit has a first connection piece for connecting a first connector of the plug unit and a second connection piece for connecting a second connector of the plug unit, so that a first flow connection for supplying fresh treatment fluid and a second flow connection for discharging used treatment fluid can be established.

[0028] If a medical fluid dispensing device is used not only for dispensing fresh fluid but also for receiving used fluid, the device used to fill the medical fluid dispensing device can also be used to empty it. In this case, only the filling process with fresh fluid is prevented. However, the device that has already been used should still be able to be emptied by the filling device.

[0029] In the simplest case, the device for providing medical fluids can be a canister or bag that has the plug unit, for example, a bag with a plug.

[0030] An embodiment of the invention will be explained in more detail below with reference to the figures.

[0031] They show: Fig. 1. A device for providing a medical fluid, in particular dialysis fluid, together with a blood treatment device and a device for filling the device for providing dialysis fluid in a highly simplified schematic representation, Fig. 2 the plug unit of the device for supplying dialysis fluid together with the socket unit of the blood treatment device of Fig. 1 in perspective view, Fig. 3 the plug unit and the socket unit of Fig. 2 in cutaway view, where plug and socket unit are not connected to each other, Fig. 4 the plug unit and the socket unit of Fig. 2 in cutaway view, showing the socket unit prepared for connection of the plug unit, Fig. 5 a section through the plug unit and socket unit of Fig. 2, wherein the plug unit is loosely inserted into the socket unit, and Fig. 6 a section through the plug unit and socket unit of Fig. 2, wherein the plug unit is connected to the socket unit, so that the flow connections are established, Fig. 7 The plug unit of the device for supplying dialysis fluid together with the socket unit of the device for filling the device for supplying dialysis fluid in a perspective view, Fig. 8A the socket unit of Fig. 7, which is prepared to initiate a rinsing process, Fig. 8B the socket unit of Fig. 7 during the rinsing process, Fig. 9 the plug unit and socket unit of Fig. 7 in cutaway view before the plug unit and socket unit are connected to each other, Fig. 10 the plug unit and socket unit of Fig. 7 in cutaway view, with the plug unit loosely placed on the socket unit and Fig. 11 a section through the plug unit and socket unit of Fig. 7, wherein the plug unit and socket unit are connected to each other to create the flow connections.

[0032] Fig. Figure 1 shows a highly simplified schematic representation of a device 1 for supplying a medical fluid, in particular dialysis fluid, together with a blood treatment device 2 and a device 3 for filling the device for supplying dialysis fluid. The blood treatment device 2 is an extracorporeal dialysis device or a device for peritoneal dialysis. In the present embodiment, the blood treatment device 2 is a dialysis device comprising a dialyzer 4, which is divided by a semipermeable membrane 5 into a blood chamber 6 and a dialysis fluid chamber 7. A blood supply line 8 leads from the patient to the blood chamber 6 of the dialyzer 4, while a blood return line 9, into which a blood pump 10 is connected, leads from the blood chamber 6 to the patient.The blood supply and return lines, 8, 9 together with the blood chamber 6 form the extracorporeal blood circuit I of the dialysis device 2.

[0033] Fresh dialysate can be fed from a dialysate reservoir 11 via a dialysate supply line 12, into which a dialysate pump 13 is connected, to the dialysate chamber 7 of the dialyzer 4, while used dialysate flows out of the dialysate chamber via a dialysate discharge line 14. However, a dialysate reservoir is not required. The provided dialysate can also be fed directly into the dialysate chamber.

[0034] The device 1, which in the present embodiment comprises two bags or canisters 15A and 15B, serves to provide fresh dialysis fluid. Both bags or canisters 15A and 15B form a unit 15, wherein bag 15A is filled with fresh dialysis fluid before the dialysis treatment and bag 15B is empty.

[0035] From the dialysis fluid bag 15A, an inlet line 16 leads to one connection 17a of a plug unit A, while from the other connection 17b of the plug unit A, an outlet line 18 leads to the empty bag 15B.

[0036] The plug unit A is connected to a socket unit B, which is provided on the blood treatment device 2, to supply dialysis fluid before treatment, so that fresh dialysis fluid can be supplied to the dialysis fluid reservoir 10 via the inlet line 16 and used dialysis fluid can be discharged via the outlet line 18.

[0037] Dialysis fluid supply device 1 is filled with fresh dialysis fluid at device 3. Device 3 can also be used to empty the dialysis fluid supply device 2. Fresh dialysis fluid can be prepared online in device 3 from water and dialysis fluid concentrate. Alternatively, fresh dialysis fluid can be supplied from an internal or external source. Used dialysis fluid can be collected in an internal or external reservoir or discharged into a drain.

[0038] Fig. Figure 1 shows an embodiment in which a tank 20A is used to hold fresh dialysis fluid and a tank 20B is used to hold used dialysis fluid. The necessary lines and pumps are not shown in this highly schematic representation. Furthermore, the device 1 for supplying dialysis fluid has a control unit (80) that controls all components of the device 1 in order to connect the device for supplying dialysis fluid to the device for filling and emptying, and to fill and empty the device for supplying dialysis fluid, as will be described in detail below.

[0039] The device 3 for filling and emptying the device 1 for supplying fresh and receiving used dialysis fluid has a socket unit B' to which the plug unit A of the device 1 for supplying dialysis fluid is connected. The socket unit B of the blood treatment device 2 and the socket unit B' of the filling / emptying device can be identical or different. In the present embodiment, the socket units B and B' are different. However, both socket units B and B' are designed such that a fluid-tight flow connection can be established with the plug unit A of the device 1 for supplying dialysis fluid between both devices 2 and 3 in both directions for fresh and used dialysis fluid.

[0040] Furthermore, the filling and emptying device 3 has a control unit 80 for controlling the filling and emptying process and a reader 81 for a machine-readable code from a flat information carrier, which is provided on the connector unit A of the device 1 for supplying dialysis fluid. The filling and emptying device 3 also has an evaluation unit 82, which evaluates the information read from the information carrier. This information can include, for example, information about the composition or quantity of the supplied medical fluid. The evaluation unit also allows for error detection, which identifies the incorrect reading of a code.In the event that the code reading fails after the information carrier is destroyed, which also includes the case where a code cannot be read at all, the evaluation unit 82 generates a control signal that the control unit 80 receives. When the control unit 80 receives the control signal, it prevents the initiation of the filling process. The initiation of the filling process is preferably prevented by ensuring that a flow connection between the plug unit A of the device 1 for supplying dialysis fluid and the socket unit of the device 3 for filling or emptying is not automatically established.

[0041] However, it is also possible that the pumps involved in the filling process (not shown) are not started or the valves (not shown) are not opened.

[0042] The following describes the connector unit A of the device 1 for supplying dialysis fluid together with the connector unit B of the blood treatment device 2 with reference to the Fig. 2 to 6 are described in detail.

[0043] Fig. Figure 2 shows the plug unit A and the socket unit B in perspective view, while the Fig. Figures 3 to 6 show the plug and socket unit A, B in a cutaway view.

[0044] The bushing unit B of the blood treatment device 2 is preferably part of a replaceable treatment cassette (not shown). However, the bushing unit B can also be part of a non-replaceable unit. The bushing unit B has an outer flange part 21, which can be connected to the housing wall 22 of the treatment cassette or blood treatment device or be integral with the wall. For example, the outer flange part 21 can be screwed to the wall with screws (not shown) or be a single injection-molded part with the wall. Two cylindrical connecting parts 23, 24 project from the outer flange part 21 and are arranged in a common plane on both sides of the central axis 58 of the bushing unit.The cylindrical connection parts 23, 24 each concentrically enclose a connection piece 25 and 26, wherein the connection piece 25 serves to supply fresh dialysis fluid and the connection piece 26 serves to remove used dialysis fluid.

[0045] The connector unit A of the device 1 for supplying fresh and receiving used dialysis fluid has corresponding connectors 27, 28, which are connected to the terminals 25, 26 in a liquid-tight manner. The connector unit A has a connector body 29 that connects the two connectors 27, 28. The connector body 29 has an inlet channel 30, which is connected to one connector 27, and an outlet channel 31, which is connected to the other connector 28. The inlet line 16 of the device 1 for supplying fresh and receiving used dialysis fluid is connected to port 17a of the inlet channel 30, and the outlet line 18 of the device 1 for supplying fresh and receiving used dialysis fluid is connected to port 17b of the outlet channel 31. Between the two connectors 27, 28 there is an attachment piece 32, with which a connection can initially only be loosely established between the plug unit A and the socket unit B.The connector 32 has several circumferentially distributed locking elements 33, which are integrally formed at one end on the connector body 29. Locking lugs 34 are formed on the outer sides of the free ends of the locking elements 33. The connectors 27 and 28 have touch protection sleeves 76 and 77, which snap onto the connectors 27, 28 of the connector body 29. The connectors 27, 28 are each closed by a preferably slotted septum or a membrane 35, 36, which is penetrated by the connecting pieces 25, 26 of the socket unit.

[0046] Between the two connectors 27 and 28, the plug body 29 has a section 83, on the outside 84 of which there is a groove 85, which runs from the front end to the rear end of the section 83 parallel to the axis in the direction in which the plug unit A is inserted into the socket unit B, so that the groove 85 is open at both ends ( Fig. 3) A planar information carrier 86 is applied to the section 83, covering the groove 85. The information carrier 86 is a thin substrate, for example a film or paper, onto which a matrix code is printed.

[0047] The socket unit B of the blood treatment device 2 has an outwardly projecting housing section 87, which is provided on its inner side with a protruding projection 88. The longitudinal groove 85 in the section 83 and the protruding projection 88 on the housing section 87 are arranged such that, when the plug unit A is inserted into the socket unit B, the protruding projection 88 engages in the groove 85, which is open at its front end. This destroys the information carrier 86 when the plug unit is connected to the socket unit. Since the protruding projection 88 also extends parallel to the axis along which the plug unit A is inserted into the socket unit B, the projection 88 serves as a guide for the plug unit when it is inserted into the socket unit.

[0048] When the plug unit A of the single-use device 1 for supplying fresh and receiving used dialysis fluid is connected to the socket unit B' of the device 3 for filling or emptying, the device 1 can only be emptied but not refilled, since the information carrier 86 is destroyed, as described with reference to Fig. 1 is described.

[0049] A cylindrical guide piece 37 is located in the center of the flange part 21 of the bushing unit B and extends through a bore 38 in the housing wall 22. A tubular receiving piece 40, which has a front section 41 and a rear section 42, is longitudinally displaceable within the guide piece 37. A drive unit 43 is provided for displacing the tubular receiving piece 40 within the cylindrical guide piece 37. In this embodiment, the drive unit 43 is an electric spindle drive comprising a linear motor 44 and a spindle 45 connected to the rear section 42 of the receiving piece 40. By extending and retracting the spindle 45, the receiving piece 40 is pushed out of or retracted into the guide piece 37.

[0050] On the inside of the front end of the front section 41 of the receiving piece 40, several circumferentially distributed recesses 46 are provided, which are designed such that the locking lugs 34 of the locking elements 33 of the attachment piece 32 of the plug unit A engage in the recesses 46 when the attachment piece 32 is inserted into the receiving piece 40, which will be described in detail below.

[0051] The bushing unit B has means for detecting that the extension piece 32 is inserted into the receiving piece 40. These means comprise a sensing element 47 designed as a tubular body, which is guided longitudinally displaceably within the tubular receiving piece 40. The tubular sensing element 47 is pre-tensioned by a spring 48 located in the rear section 42 of the receiving piece 40. The longitudinal movement of the sensing element 47 is limited by a stop element 49, shown only in outline, which is guided in a slot provided in the receiving piece 40 (not visible in the present sectional plane).

[0052] To detect the attachment piece 32 in the receiving piece 40, the socket unit B has means by which it can detect whether the front end of the key element 47 is flush with the front end of the receiving piece 40 ( Fig. 3) or is pushed back into the receiving piece against the preload of the spring 48. This is the case when the extension piece 32 is inserted into the receiving piece 40.

[0053] The bushing unit B further comprises a pin-shaped body 50, which is immovably arranged within the tubular sensing element 47. The pin-shaped body 50 can, for example, be locked in place by a pin 39, which extends into the guide piece 37 through slots in the sensing element 47 and the receiving piece 40 (slots not shown in the section plane).

[0054] The following describes in detail how to connect the plug unit A to the socket unit B.

[0055] Fig. Figure 3 shows the initial position in which the bushing unit B is locked. In this position, the spindle 45 of the linear motor 43 is retracted, which retracts the receiving piece 40 with the sensing element 47, so that the pin-shaped body 50 protrudes from the receiving piece. The pin-shaped body 50 thus prevents the insertion of the extension piece 32 into the receiving piece 40.

[0056] Fig. Figure 4 shows the position of the receiving piece 40 with the sensing element 47, in which the spindle 45 of the linear motor 44 is extended and the receiving piece 40 with the sensing element 47 is pushed outwards from the guide piece 37. In this position, the pin-shaped body 50, which is connected to the guide piece 37, is retracted sufficiently to allow the attachment 32 of the connector unit A to be inserted into the receiving piece 40.

[0057] Fig. Figure 5 shows the attachment piece 32 of the plug unit A, which is seated in the receiving piece 40 of the socket unit B. When the attachment piece 32 is inserted into the receiving piece 40, the locking lugs 34 of the locking elements 33 snap into the recesses 46 of the receiving piece 40. This holds the plug unit A loosely on the socket unit. However, the flow connection is not yet established, as the connecting pieces 25, 26 of the socket unit B are not yet connected to the connectors 27, 28 of the plug unit A. In this position, the inlet and outlet channels 30, 31 of the plug unit are still sealed liquid-tight by the membranes 35, 36.

[0058] When the extension piece 32 is inserted into the receiving piece 40, the sensing element 47, which is guided longitudinally displaceably in the receiving piece, is pushed back into the receiving piece 40 by the detent elements 33 of the extension piece 32 against the spring force of the spring 48. The rear position of the sensing element 47, which is in Fig. The movement shown in Figure 5 is detected by means not shown, for example, electrical contacts that are closed, or a light barrier, thereby activating the drive unit 43. The linear motor 44 then retracts the spindle 45, so that the workpiece 40 with the sensing element 47 is retracted.

[0059] Fig. Figure 6 shows the position of the receiving piece 40 when the spindle 45 of the linear motor 44 is fully retracted and the receiving piece 40 with the sensing element 37 is fully retracted. As the receiving piece 40 is retracted, the pin-shaped body 50 is advanced into the extension piece 32, thereby securing the locking lugs 34 of the locking elements 33 of the extension piece 32 in the recesses 46 of the receiving piece 40. This locks the extension piece 32 into the receiving piece 40. The locking of the extension piece 32 into the receiving piece 40 occurs simultaneously with the relative movement of the connecting pieces 25, 26 and the connectors 27, 28.

[0060] In the Fig. In the position shown in Figure 6, where the spindle 45 of the linear motor 44 is fully retracted, both connecting pieces 25, 26 and connectors 27, 28 are connected to each other in a liquid-tight manner. The locking of the connecting piece 32 in the receiving piece 40 ensures, firstly, that the plug unit A, which is initially only loosely inserted into the socket unit B, can be pulled onto the socket unit against the forces acting upon it, and secondly, that the plug unit cannot detach from the socket unit after the flow connections have been established. The liquid-tight and non-removable connection between plug unit A and socket unit B is therefore automatically established after the plug unit is loosely inserted into the socket unit.

[0061] The unlocking of plug unit A from socket unit B occurs in the reverse order of the locking of the plug unit to the socket unit. For this purpose, the drive unit 43 is restarted. This can be done, for example, by pressing a button or the like. When the spindle 45 of the linear motor 44 is extended again, the receiving piece 40 with the sensing element 47 slides forward again over the pin-shaped body 50, thereby releasing the locking mechanism of the latching connection between the attachment piece 32 and the receiving piece 40. At the same time, the connecting pieces 25, 26 are disconnected from the connectors 27, 28. The plug unit A is thus back in its initial position ( Fig. 5), in which the plug unit is still loosely held to the socket unit. This prevents the plug unit from simply falling off the socket unit.

[0062] The Fig. Figures 7-11 show an alternative embodiment of the socket unit B', which is provided on the device 3 for filling the device 1 for supplying the dialysis fluid. This alternative embodiment can also be provided on the blood treatment device 2. However, it is also possible that, with reference to the Fig. The embodiment described in sections 2 to 6 is provided for filling in device 3. The alternative embodiment of the bushing unit B' is described in detail below.

[0063] Fig. Figure 7 shows the alternative embodiment of the socket unit B' together with the plug unit A in a perspective view. Both embodiments of the socket units B and B' can be connected to the same plug unit A, so that the device 1 for supplying dialysis fluid can be connected on the one hand to the device 3 for filling and emptying and on the other hand to the blood treatment device 2.

[0064] The two embodiments of the socket unit differ from each other in particular in that, when connecting the plug unit A to the socket unit B to establish the flow connections, the connectors 27, 28 of the plug unit A are automatically pulled onto the connecting pieces 25, 26 of the socket unit B ( Fig. 2 to 6), in which the plug unit A is moved, whereas in the alternative embodiment of the socket unit B', the connecting pieces of the socket unit are inserted into the connectors 27, 28 of the plug unit A, without the plug unit A being moved. Furthermore, the alternative embodiment of the socket unit B' provides for the closure of the two connecting pieces or the creation of a flow connection between the two connecting pieces for a flushing process, without the plug unit A and socket unit B' being connected to each other.

[0065] The socket unit B' has a housing body 51 which is inserted into a housing wall 52 of the device 3 for filling ( Fig. 7) The housing body 51 has a central recess 53 in which the receiving piece 57 for the attachment piece 32 of the plug unit A is arranged ( Fig. 9). In contrast to the one referring to the Fig. In the embodiment described in Figures 2-6, the receiving element 57 of the bushing unit B' is not guided to be displaceable in the direction of the longitudinal axis 58 of the bushing unit B', but is rotatably mounted about the longitudinal axis 58 with a bearing 59, which is inserted into the central recess 53 of the housing body 51. The receiving element 57 is rotated by a drive unit (not shown).

[0066] The receiving piece 57 has a front section 60 extending from the housing body 51 and a rear section 61 extending into the housing body 51, the front section 60 having a larger outer and inner diameter than the rear section 61. Circumferentially distributed recesses 62 are provided on the inside of the front end of the front section 60 of the receiving piece 57, into which the locking lugs 34 of the locking elements 33 of the attachment piece 32 engage when the plug unit A is loosely placed onto the socket unit B'.

[0067] The sensing element 63, designed as a tubular body, is guided longitudinally displaceably in the tubular receiving piece 57 and is pre-tensioned with a spring (not shown), so that when the attachment piece 32 is inserted into the receiving piece 57, the sensing element 63 is pushed back against the spring tension.

[0068] The pin-shaped body 64 is guided in the tubular key element 63 for locking the attachment piece 32 in the receiving piece 57. The pin-shaped body 64 can be advanced and retracted longitudinally along the axis 58 by a drive unit (not shown) to release or lock the attachment piece 32 in the receiving piece 57.

[0069] In the alternative embodiment of the bushing unit B', the connecting pieces 65, 66 are seated in cylindrical recesses 67, 68 of a connecting part 69, which is guided longitudinally displaceably in the housing body 51, so that the connecting pieces 65, 66 can be extended out of or retracted into the housing body 51. The drive unit for extending or retracting the connecting part 69 with the connecting pieces 65, 66 is not shown in the figures.

[0070] Fig. Figure 9 shows the socket unit B' in the position in which the plug unit A can be loosely placed onto the socket unit B'. The pin-shaped body 64 is retracted into the receiving piece 57, so that the locking elements 33 can engage with the locking lugs 34 of the attachment piece 32 in the receiving piece 57 with the recesses 62.

[0071] Fig. Figure 10 shows the position in which the plug unit A is loosely placed onto the socket unit B', with the attachment 32 snapped into the receiving piece 57. The plug unit A is only held loosely in this position, without the flow connections being established.

[0072] The position of the sensing element 63 is monitored again. Since the sensing element 63 is pushed back from the attachment piece 32, it is detected that the connector unit A is loosely attached. If the connector unit is loosely attached, the drive unit (not shown) is activated, which pushes the pin-shaped body 64 forward in the receiving piece 57. This locks the initially loose connection between the attachment piece 32 and the receiving piece 57. Simultaneously, the connecting part 69 with the two connecting pieces 65, 66 is pushed forward out of the housing body 51. It is also possible that the pin-shaped body 64 and the connecting part 69 are connected to each other and moved together by a drive unit.By moving the connecting part 69 with the connecting pieces 65, 66, the connecting pieces 65, 66 pierce the membranes 35, 36 of the plug unit A, thereby establishing the liquid-tight connections between the connecting pieces and connectors. Although relative movement again occurs between connecting pieces 65, 66 and connectors 27, 28, in this embodiment the plug unit A itself does not move. Since the plug unit A is firmly seated on the socket unit B' after the insertion piece is locked to the receiving piece, the forces occurring when connecting the plug and socket units can be absorbed. The connection of the plug unit to the socket unit thus occurs automatically.

[0073] The disconnection of plug unit A from socket unit B' is carried out in reverse order. For this purpose, the pin-shaped body 64 is withdrawn from the receiving piece 57, and the connecting part 69 with the connecting pieces 65, 66 is withdrawn from the housing body 51. This unlocks the connection between the attachment piece 32 and the receiving piece 57, and the connecting pieces 65, 66 are pulled out of the connectors 27, 28. The unlocking can occur simultaneously with the withdrawal of the connecting pieces or before the withdrawal of the connecting pieces.

[0074] The alternative embodiment of the bushing unit B' has a device 70 for closing the two connecting pieces 65, 66 or for creating a flow connection between the two connecting pieces 65, 66 in order to be able to carry out a flushing process with a flushing solution ( Fig. 7; Fig. 8A and Fig. 8B). This device 70 has two connectors 71, 72 which are arranged at the same distance from each other as the connectors 27, 28 of the plug unit A and have the same design as the connectors of the plug unit. The two connectors 71, 72 are closed at their rear end in a flushing piece 73 or are connected in the flushing piece 73 to create a flow connection.

[0075] The flushing piece 73 has semicircular incisions 74, 75 on the two opposite sides where the connectors 71, 72 are not arranged. The flushing piece 73 with the connectors 71, 72 is connected to the front section 60 of the receiving piece 57 of the bushing unit B'. For this purpose, the flushing piece 73 has a central recess 89 through which the front section 60 of the receiving piece 57 extends ( Fig. 9) Since the receiving piece 57 is rotatably mounted about the longitudinal axis 58, the flushing piece 73 with the connectors 71, 72 can also be rotated about the longitudinal axis 58 by rotating the receiving piece 57 with the drive unit (not shown).

[0076] Fig. Figure 7 shows the flushing piece 73 with the connectors 71, 72 in the position in which the plug unit A can be placed onto the socket unit B'. In this position, the semicircular recesses 74, 75 are located in front of the connecting pieces 65, 66 of the socket unit B', while the connectors 71, 72 are arranged in a plane that is perpendicular to the plane in which the connecting pieces 65, 66 are arranged.

[0077] To initiate the flushing process, the flushing piece 73 with the connectors 71, 72 is pivoted by 90° by rotating the receiving piece 57 of the drive unit (not shown), so that the connectors 71, 72 are located in front of the connection pieces 65, 66. However, this does not yet close the connection pieces or establish a flow connection between the connection pieces ( Fig. 8A). Subsequently, the connecting part 69 with the connecting pieces 65, 66 is advanced from the housing body 51, so that the connectors 65, 66 are inserted into the diaphragms of the connectors 71, 72. This creates a liquid-tight flow connection between the connecting pieces 65, 66 of the socket unit B' and the connectors 71, 72, so that the two connecting pieces 65, 66 are closed or short-circuited via the flushing piece 73 ( Fig. 8B). After completion of the flushing process, the connecting pieces 65, 66 are withdrawn again and the flushing piece 73 with the connectors 71, 72 is returned to the starting position ( Fig. 7) reversed.

[0078] The flushing piece 73 of the socket unit (B') and the plug body 29 of the plug unit A are asymmetrically designed, so that the plug unit A can only be inserted in the Fig. The correct position shown in Figure 7 is to be inserted into the socket unit (B'). For this purpose, the flushing piece 73 has a U-shaped projection 78 on its outer side opposite the plug body, while the plug body 29 has a projection 79 on its outer side opposite the flushing piece. The projection 79 is arranged such that it abuts the projection 78 when the plug unit A is inserted into the socket unit (B') in a position rotated by 180°.

[0079] The special design of the device 70 for sealing or establishing the flow connection constitutes an integral part of the socket unit B'. A separate plug or the like is therefore not required. The socket unit B' allows for fully automatic control of both the connection of the plug unit A to the socket unit B' and the initiation of the rinsing process, thus simplifying overall handling. Since the insertion of the plug unit into the socket unit is detected, the filling or emptying process can be initiated automatically. However, the filling process can also be prevented if the information carrier 86 on the plug unit A is damaged. Preferably, the control unit 80 of the filling device 3 prevents the connecting pieces 65, 66 of the socket unit B from being extended to establish a flow connection.After filling or emptying, the connector unit can be automatically released. The same applies to the rinsing process. Similarly, when connecting device 1 for supplying dialysis fluid to dialysis device 2, the filling of the fluid reservoir 10 can be started automatically by inserting connector unit A into socket unit B of the dialysis device.

Claims

[1] Medical treatment system with at least one device (1) for providing a medical fluid for an extracorporeal dialysis device or a peritoneal dialysis device, with a plug unit (A) for connection to a socket unit of the dialysis device or device for peritoneal dialysis (2), wherein the plug unit (A) has means (86) for signaling two operating states, which are designed such that the means (86) for signaling two operating states are susceptible to damage or destruction when the plug unit (A) is connected to the socket unit of the dialysis device or device for peritoneal dialysis (2), wherein the first operating state is the state before the plug unit (A) is connected to the socket unit (B), when the means are undamaged, and the second operating state is the state after the plug unit (A) is connected to the socket unit (B), when the means are damaged or destroyed, and at least one extracorporeal dialysis device or peritoneal dialysis device (2), with a socket unit (B) for connecting the plug unit of the device (1) for supplying a medical fluid to the dialysis device or device for peritoneal dialysis (2), wherein the socket unit (B) comprises means (88) for damaging or destroying the means for signaling two operating states of the device (1) for supplying a medical fluid, which are configured such that the means for signaling two operating states are damaged or destroyed when the plug unit of the device for supplying a medical fluid is connected to the socket unit (B). [2] Medical treatment system with at least one device (1) for providing a medical fluid for an extracorporeal dialysis device or a peritoneal dialysis device, with a plug unit (A) for connection to a socket unit of the dialysis device or device for peritoneal dialysis (2), wherein the plug unit (A) has means (86) for signaling two operating states, which are designed such that the means (86) for signaling two operating states are susceptible to damage or destruction when the plug unit (A) is connected to the socket unit of the dialysis device or device for peritoneal dialysis (2), wherein the first operating state is the state before the plug unit (A) is connected to the socket unit (B), when the means are undamaged, and the second operating state is the state after the plug unit (A) is connected to the socket unit (B), when the means are damaged or destroyed, and at least one device (3) for filling the device for supplying a medical fluid, with a socket unit (B') for connecting the plug unit (A) of the device (1) for supplying a medical fluid, wherein the filling device (3) has means (81; 82) for detecting the reuse of the device for supplying a medical fluid, which are designed to detect whether the means for signaling two operating states of the plug unit (A) of the device (1) for supplying a medical fluid are intact or damaged or destroyed. [3] Medical treatment system according to claim 1, characterized by, that the means (88) for damaging or destroying have a projecting projection (88) provided on a section of the socket unit (B) of the dialysis device or device for peritoneal dialysis (2), which, when the plug unit (A) of the device (1) for supplying a medical fluid is connected to the socket unit (B) of the dialysis device or device for peritoneal dialysis (2), can engage in a recess of a section of the plug unit (A) on which a planar information carrier is applied. [4] Medical treatment system according to claim 2, characterized by, that the means for signaling two operating states of the device (1) for providing a medical fluid comprise a planar information carrier (86) and the means (81; 82) for detecting the reuse of the device (3) for filling comprise a unit (81) for reading information on the planar information carrier and an evaluation unit (82) which is designed such that a reuse signal is generated when, after damage or destruction of the information carrier, the reading of information is faulty. [5] Medical treatment system according to claim 4, characterized by , that the filling device (3) has a control unit (80) for controlling the filling process, which is designed in such a way that the initiation of the filling process is prevented when the evaluation unit (82) generates the signal indicating reuse. [6] Medical treatment system according to claim 4 or 5, characterized by , that the unit for reading information is a reader (81) for a matrix code. [7] Medical treatment system according to any one of claims 1 to 6, characterized by , that the means for signaling two operating states have a planar information carrier (86) which carries machine-readable information about characteristic properties of the medical fluid. [8] Medical treatment system Claim 7, characterized by, that the information carrier (86) is applied to a section (83) of the plug unit (A) of the device (1) for supplying a medical fluid, which is provided with a recess (85), such that the information carrier is damaged or destroyed by a protruding projection of the socket unit (B) of the dialysis device or device for peritoneal dialysis (2) engaging in the recess when the plug unit (A) is connected to the socket unit (B). [9] Medical treatment system according to claim 8, characterized by, that the recess is a groove (85) open at least at one end in the section (83) of the plug unit (A) of the device (1) for supplying a medical fluid, which runs parallel to the axis (58) of the plug unit (A) in the direction in which the plug unit (A) is inserted into the socket unit (B) of the dialysis device or device for peritoneal dialysis (2), so that when the plug unit (A) is inserted into the socket unit the projecting projection is inserted into the groove (85). [10] Medical treatment system according to any one of claims 1 to 9, characterized by, that the plug unit (A) of the device (1) for providing a medical fluid has two connectors (27, 28) for connecting two connectors of the socket unit (B) of the dialysis device or device for peritoneal dialysis (2) so that a flow connection can be established for supplying fresh fluid and draining used fluid. [11] Medical treatment system according to claim 1 and any one of claims 3 to 10, characterized by , that the socket unit (B) of the dialysis device or device for peritoneal dialysis (2) has two connectors (25, 26) for connecting two connectors of the plug unit (A) of the device (1) for providing a medical fluid, so that a flow connection can be established for supplying fresh fluid or removing used fluid.

Images