Infusion set for an infusion device

Abstract

The invention relates to an infusion set, wherein the infusion set is used to feed one or more liquid products. The infusion set comprises a base part (1) having a cannula (1a) for administering the liquid product into the body of the patient. The infusion set further comprises a connecting part (2) and a first (3) and second (4) connector part, wherein the first connector part (3) and the second connector part (4) can be coupled to and decoupled from the connecting part (2) in such a way that a releasable connection is established in a direction transverse to the longitudinal axis of the cannula (1a).

Description

[0001] Infusion set for an infusion device

[0002] The invention relates to an infusion set for an infusion device, wherein the infusion set serves to supply one or more liquid products, in particular liquid medications, from an infusion device into the body.

[0003] The term "medicinal product" here encompasses any flowable medical formulation suitable for controlled administration through a means such as a cannula or needle, particularly a hollow needle, comprising, for example, a liquid, solution, gel, or fine suspension containing one or more medicinal active substances. A medicinal product may be a composition with a single active substance or a premixed or co-formulated composition with multiple active substances from a single container. Medicinal products include drugs such as peptides (e.g., insulins, insulin-containing medicinal products, GLP-1-containing and derived or analogous preparations), proteins and hormones, biologically derived or active substances, hormone- or gene-based active substances, nutritional formulations, enzymes (e.g., hydrolases, lyases), and other substances in both solid (suspended) or liquid form, as well as polysaccharides (e.g.,Glycosaminoglycan), vaccine, DNA or RNA or oligonucleotides, antibodies or parts of antibodies, as well as suitable base, excipients and carriers.

[0004] In patients with a regular need for liquid medication, the required amount can be administered to the body in liquid form via a cannula positioned in the subcutaneous tissue for an extended period. For this purpose, an infusion set with a cannula made of a soft or rigid material is attached to the patient's skin in such a way that the cannula penetrates the skin and reaches the subcutaneous tissue. The required amount of medication in liquid form is thus administered from an infusion device, in particular an infusion pump, preferably an automatic infusion pump, via a supply line to the patient, with the cannula in the infusion set delivering the liquid medication to the patient.

[0005] Infusion sets are known from the prior art. Document EP2026865B1 discloses an infusion set comprising a first component with a cannula, the cannula serving to penetrate the skin into the subcutaneous tissue in order to administer a liquid medication to a patient. The infusion set also comprises a second component, which is rotatable relative to the first component about an axis of rotation parallel to the longitudinal axis of the cannula. Furthermore, the infusion set includes a connector to which a supply line, in particular a tube, is attached. The supply line can be connected to an infusion device, in particular an infusion pump. Thus, the liquid medication can be administered from the infusion device to the patient via the infusion set. The connector can be coupled to or detached from the second component transversely to the longitudinal axis of the cannula.This arrangement can improve wearing comfort.

[0006] One object of the invention is to provide an alternative infusion set.

[0007] This problem is solved by the subject matter of independent claim 1. Advantageous embodiments are defined in the dependent claims.

[0008] In the infusion set according to the invention, "distal" refers to the side to which an adhesive patch can be attached for securing the infusion set to a patient's skin. "Proximal" refers to the side opposite the distal side in the infusion set according to the invention.

[0009] The infusion set according to the invention can be attached to an infusion device, in particular an infusion pump, and most preferably an automatic infusion pump. Infusion devices can be used for the continuous administration of infusions, especially of medications in liquid form. The infusion device can be reusable, in which case a new container pre-filled with a liquid medication can be inserted into the reusable infusion device. Alternatively, the infusion device can be disposable, in which case the infusion device is discarded when a container pre-filled with the liquid medication is empty.

[0010] The infusion set comprises a base for application to the patient's skin, the base having a proximal and a distal side. The base also includes a cannula for administering the liquid medication into the patient's body. The cannula is located on the distal side of the base. Furthermore, the infusion set includes a connecting piece. The connecting piece is permanently attached to the proximal side of the base. The connecting piece and the base are rotatable relative to each other about an axis of rotation (R) parallel to the longitudinal axis of the cannula. This arrangement improves patient comfort. The infusion set may also include a first connector with a first supply line, in particular a first tube. The first supply line can be used to connect to the first infusion device.Furthermore, the first connector part has a first feed cannula for connection with the connecting part.

[0011] Furthermore, the infusion set can include a cap for holding the infusion set by the patient or by an insertion device or insertion aid. In a first embodiment of the invention, the infusion set can be equipped with a soft cannula, wherein the cannula may be made of a soft or flexible material, in particular a polymer, or in a second embodiment of the invention with a rigid cannula, wherein the cannula may be made of steel or an alternative rigid material.

[0012] In a first embodiment of the infusion set, the cap part of the infusion set can have a rigid needle, which may be made of steel or an alternative rigid material. The cap part can be detachably connected to the connecting part or the base part. The connection can preferably be a snap-fit ​​connection. Alternative connections may be provided. The cap part can be connected to the connecting part or the base part, in particular snapped into place, such that the rigid needle can be arranged concentrically in a soft cannula of the base part. The soft cannula can serve to administer a liquid medication into a patient's body. The cap part can be arranged on a proximal side of the connecting part or the base part.The concentric arrangement of the soft cannula and the rigid needle can guide the soft cannula when the soft cannula of the base is inserted into the patient's skin. The distal tip of the rigid needle can extend beyond the distal end of the soft cannula. Furthermore, an adhesive strip may be attached to the distal side of the base. This adhesive strip can be used to secure the infusion set to the patient's skin. To apply the infusion set to the patient's skin, the base, which is directly or indirectly connected to the cap, can be adhered to the patient's skin using the adhesive strip. A protective film can be removed from one adhesive side of the adhesive strip beforehand. This allows the soft cannula, with its rigid needle attached, to penetrate the patient's skin and enter the subcutaneous tissue.To connect the infusion set to an infusion device, the cap section with the needle can first be removed from the base section, and a first connector section, which includes the first supply cannula, can be attached to the connecting section of the infusion set. The connection between the connecting section and the first connector section can be a snap-fit ​​connection and / or an engagement connection. Alternative connection types may be provided. The connection between the connecting section and the first connector section is designed to be detachable. The connecting section and the first connector section can have a snap-fit ​​element and a corresponding first snap-fit ​​counter-element. The connecting section and the first connector section can have guides so that the connecting section and the first connector section engage. The first supply cannula and the first connector section can be designed as two separate pieces.The first supply cannula can be welded and / or glued to the first connector part. Alternatively, the first supply cannula and the first connector part can be formed as a single piece, particularly from the same material. The first supply line of the first connector part can have an adapter. The first supply line can be welded and / or glued to the adapter. The adapter of the first connector part can be detachably attached to a corresponding connecting element of the first infusion device. This allows a fluid connection from the infusion device, via the infusion set, to the patient.

[0013] In a second embodiment of the infusion set, the infusion set may include an alternatively designed cap part. The cap part does not have a rigid needle. The base part may include a rigid cannula. The rigid cannula may be used to administer a liquid medication into a patient's body. The cap part may be detachably connected to the connecting part or to the base part. The connection may preferably be a snap-fit ​​connection. Alternative connection types may be provided. The cap part may be located on a proximal side of the connecting part or the base part. An adhesive patch for securing the infusion set to the patient's skin may be provided on the distal side of the base part.To attach the infusion set to the patient's skin, the base part, which is directly or indirectly connected to the cap part, can be adhered to the patient's skin using adhesive tape. A protective film can first be removed from one adhesive side of the tape. This allows the rigid cannula of the base part to penetrate the patient's subcutaneous tissue. The cap part can then be removed from the connecting part or from the base part to detachably connect the first connector part to the connecting part of the infusion set and the first infusion device, as described above.

[0014] The first and second embodiments of the infusion set may preferably include a detachable protective element. This protective element may serve to protect against needlestick injuries from the rigid cannula or the rigid needle of the respective infusion set. The protective element may also serve to protect against stinging injuries from the first connecting cannula of the infusion set. The protective element may preferably be sleeve-shaped. Alternative designs of the protective element are possible. One or more longitudinal ribs may preferably be provided on an outer surface of the protective element to improve grip. The protective element may be detachably connected to the base part and / or the cap part and / or the first connector part by a frictional and / or positive locking mechanism to protect the patient from needlestick injuries.

[0015] The infusion set according to the invention can comprise a second connector part. In one embodiment of the invention, the second connector part can be designed as a supplementary part to the first connector part, such that the first and second connector parts essentially cover the base part when the first and second connector parts are engaged. In a second embodiment of the invention, the second connector part can also be designed as a supplementary part to the first connector part and, additionally, can be equipped, analogously to the first connector part, with a second supply line, in particular a second tube for connection to a second infusion device, and with a second supply cannula for connection to the connecting part.Analogous to the first embodiment of the invention, the first and second connector parts can also essentially cover the base part when the first and second connector parts are engaged, and two liquid products, in particular two liquid medications, can be supplied to the body from the two infusion devices.

[0016] Administering two liquid products, particularly two medications, simultaneously, sequentially, and / or as needed allows for more targeted treatment of a disease. For example, to treat diabetes, insulin and glucagon or an analogue (e.g., diglucagon) can be administered via two infusion devices using the infusion set according to the invention. Glucagon acts antagonistically to insulin. Insulin lowers blood glucose, and in the event of impending or existing hypoglycemia, glucagon should be administered to the patient immediately or as an emergency measure via the second infusion device and the second connector. This hypoglycemia primarily occurs as a side effect of insulin treatment for diabetes. If the administered amount of insulin exceeds the patient's needs, the blood glucose level drops too low, requiring immediate administration of glucagon.By measuring the patient's blood sugar, for example using a sensor, the two infusion devices can be controlled in such a way that insulin or glucagon is administered through the infusion set as needed.

[0017] For example, improved diabetes treatment can also be achieved by simultaneously administering insulin and, for example, an amylin analogue, GLP-1 agonist, or SGLT2 inhibitor via the infusion set according to the invention. In addition to lowering blood glucose, this can simultaneously slow gastric emptying, promote satiety, stimulate insulin secretion, reduce hunger, stimulate glucose release, improve cardiac and renal function, and / or slow gastric emptying.

[0018] Other diseases, such as obesity, Parkinson's disease, immune or autoimmune disorders, or pain, can also be treated more effectively through the simultaneous or sequential administration of two liquid products, particularly two medications. For example, GL1-1 agonists, amylin analogs, levodopa or carbidopa, apomorphine, opioids, local anesthetics, biologic combinations, and / or corticosteroids can be administered to the patient simultaneously or sequentially via the infusion set according to the invention.

[0019] The first and second connector parts of the infusion set according to the invention can be attached to and detached from the connecting part in such a way that a detachable connection is formed in each case in a direction transverse to the longitudinal axis of the cannula. This arrangement reduces the pain caused by the inserted cannula of the base part, since no or reduced pressure is exerted on the insertion site during attachment and detachment.

[0020] Furthermore, the connecting part of the infusion set includes a septum with a channel running parallel to the longitudinal axis of the cannula to form a fluid connection between the connecting part and the cannula in the base part. The septum also extends transversely to the longitudinal axis of the cannula, allowing the first supply cannula of the first connector part to penetrate the septum and establish a fluid connection between the first connector part and the channel of the connecting part. The septum is preferably T-shaped, and in particular T-shaped, within the connecting part. The septum may close off a proximal end of the channel. The septum is designed such that the supply cannula of the first connector part can penetrate it. The fluid connection between the first connector part and the channel of the connecting part can be established in any relative rotational position of the connecting part to the base part about the axis of rotation (R).

[0021] A first connector part, which serves only to at least partially conceal the base part, can be attached to and detached from the connecting part of the infusion set. If necessary, the first connector part can be replaced by a second connector part, which serves for the additional administration of a second liquid product, in particular a second liquid medication, into the body.

[0022] The second connector part may have a second supply cannula for connection to the connecting part and a second supply line for connection to a second infusion device, wherein the septum of the connecting part extends transversely to the longitudinal axis of the cannula, so that the second supply cannula of the second connector part can pierce the septum to form a fluid connection between the second connector part and the channel of the connecting part.

[0023] The base and the connecting part can preferably be arranged to rotate relative to each other about the axis of rotation (R), which runs parallel to the longitudinal axis of the cannula, by 360° or by less than 360°. The relative rotation can occur in both directions around the axis of rotation (R). The first and second connector parts can be attached to the connecting part in any relative position between the base and the connecting part. A 360° relative rotation around the axis of rotation (R) ensures maximum freedom of movement for the patient. A rotation of less than 360° around the axis of rotation (R) prevents unwanted coiling of the supply line(s).

[0024] The first connector part and the second connector part can be coupled and uncoupled from the connecting part in such a way that a detachable axially fixed and / or a detachable rotationally fixed connection can be made between the first connector part and the connecting part and between the second connector part and the connecting part.

[0025] The connecting part preferably has a locking element which can form a releasable, in particular a releasable axially fixed, connection with a first corresponding locking element provided on the first connector part, and which can form a releasable, in particular a releasable axially fixed, connection with a second corresponding locking element provided on the second connector part. This releasable, in particular this releasable axially fixed, connection can be designed as a snap-fit ​​connection. Alternatively or additionally, the releasable, in particular the releasable axially fixed, connection can be designed as a snap-fit ​​connection, bayonet connection, hook connection, or screw connection. This ensures, in particular, that the connection between the first connector part or the second connector part and the connecting part can be established and released at any time.The snap-fit ​​connection serves in particular to allow the first and second connector parts to be detachably coupled to and uncoupled from the connecting part. The detachable connection can be designed as a positive-locking and / or force-locking connection, in particular as a positive-locking connection. The detachable connection can preferably be designed as a detachable axially fixed connection.

[0026] In a preferred embodiment of the invention, the locking element of the connecting part can be designed as an annular groove, and the first locking counterpart of the first connector part and the second locking counterpart of the second connector part can be designed as locking rings that can engage in the annular groove. The locking connections can be designed as releasable, axially fixed connections. The locking connection serves, in particular, to allow the first and second connector parts to be axially fixedly coupled to the connecting part and, conversely, to be removed or disconnected from the connecting part. Thus, the first and second connector parts can be coupled to and disconnected from the connecting part via a locking connection, whereby when the first and / or the second connector part is coupled to the connecting part, the first and / or the second connector part is axially fixed to the connecting part.

[0027] The connecting part can, in particular, have a guide element that can engage with a first corresponding guide element provided on the first connector part and with a second corresponding guide element provided on the second connector part. The guide engagements can be designed as a detachable connection. These guide engagements serve, in particular, to ensure that the first and second connector parts can be detachably connected to and disconnected from the connecting part. This ensures, in particular, that the connection between the first connector part or the second connector part and the connecting part can be established and released at any time. The detachable connection can be designed as a detachable, rotationally fixed connection.The first and second connector parts can preferably engage with the connecting part in such a way that they can interlock positively and / or negatively, and in particular, be detachably positively engaged. The coupling and decoupling between the first and second connector parts and the connecting part can preferably be effected such that a detachable, rotationally fixed connection about the axis of rotation (R) is formed in each case.

[0028] In a preferred embodiment of the invention, the guide element of the connecting part can be at least partially polygonal. Furthermore, the first guide element of the first connector part and the second guide element of the second connector part can be configured as corresponding parts to this partially polygonal connecting part. The connecting part can have a polygonal cross-section. The polygon can have n-sided polygons. Preferably, the polygon can be a regular polygon. Alternatively, the polygon can be irregular. The sides of the polygon can serve as guides. The sides of the polygon can be parallel and / or oblique to the longitudinal axis of the cannula.

[0029] In a preferred embodiment of the invention, the base part can be circular. If, for example, the first and second connector parts interlock in a form-fitting and detachable manner, the interlocking connector parts can substantially conceal the base part. The interlocking connector parts can together form a circle or a hemisphere. The first and second connector parts can be cap-shaped.

[0030] The invention is described below with reference to several figures. The features disclosed herein, individually and in any combination of features, advantageously further develop the invention. The figures show:

[0031] Figure 1: a first perspective top view of an inventive arrangement, wherein a first (3) and a second connector part (4) are located away from a connecting part (2).

[0032] Figure 2: a second perspective top view of the arrangement according to Figure 1, wherein the first (3) and the second connector part (4) are removed from the connecting part (2).

[0033] Figure 3: a perspective top view of the arrangement according to Figures 1 and 2, wherein the first connector part (3) is connected to the connecting part (2) and the second connector part (4) is away from the connecting part (2).

[0034] Figure 4: a perspective top view of the arrangement according to Figures 1 and 2, wherein the first (3) and the second connector part (4) are connected to the connecting part (2).

[0035] Figure 5: a longitudinal sectional view of the arrangement according to Figures 1 and 2, wherein the first (3) and the second connector part (4) are connected to the connecting part (2) according to Figure 4.

[0036] Figure 1 shows a first perspective top view and Figure 2 shows a second perspective top view of an infusion set according to the invention, wherein a first (3) and a second connector part (4) are located away from a connecting part (2).

[0037] The infusion set comprises a base part (1). The base part (1) has a proximal and a distal side. The base part (1) serves to attach the infusion set to the skin, with an adhesive patch (1b) arranged on the distal side of the base part. A cannula (Figure 5; 1a) for administering the liquid medication into the patient's body is also provided on the base part (1). The cannula (Figure 5; 1a) can be designed as a soft or rigid cannula (Figure 5; 1a). The infusion set further comprises a connecting part (2). The connecting part (2) is permanently attached to the proximal side of the base part (1). The connecting part (2) and the base part (1) are rotatably arranged relative to each other about an axis of rotation (R) that runs parallel to the longitudinal axis of the cannula (Figure 5; 1a). The relative rotation around the axis of rotation (R) can improve wearing comfort, as it ensures the patient's freedom of movement.The infusion set comprises a first connector part (3) with a first supply line (3b), for example, a first tube. The first supply line (3b) serves to connect to a first infusion device. The first connector part (3) has a first supply cannula (3a) for connection to the connecting part (2). In this embodiment of the invention, the infusion set further comprises a second connector part (4), which on the one hand comprises a second supply line (4b) for connection to a second infusion device and on the other hand comprises a second supply cannula (4a) for connection to the connecting part (2). The second connector part (4) can be designed as a supplementary part to the first connector part (3).In another embodiment of the invention, the second connector part can be configured only as a supplementary part to the first connector part (3) and thus does not include a second supply line or a second supply cannula. These two second connector parts can be coupled to or disconnected from the connecting part (2) of the infusion set as needed. The second connector part, configured as a supplementary part, is designed such that the first (3) and the second connector part (4) essentially cover the base part (1) when the first (3) and the second connector part (4) are engaged. When the first (3) and the second connector part (4) are engaged, two liquid products, in particular two liquid medications, can be administered into the body from the two infusion devices.The two liquid products, especially two medications, can be administered to the body simultaneously, sequentially and / or as needed, allowing for more targeted treatment of a disease, such as diabetes, obesity, Parkinson's disease, or autoimmune diseases, or for more targeted treatment of a therapy, such as pain therapy or immunotherapy.

[0038] The first connector part (3) and the second connector part (4) of the infusion set according to the invention can be coupled and uncoupled from the connecting part (2) such that a detachable connection is formed in each case in a direction transverse to the longitudinal axis of the cannula (Figure 5; 1a). This arrangement reduces the pain caused by the inserted cannula (Figure 5; 1a) of the base part (1), since no or reduced pressure is exerted on the insertion site during coupling and uncoupling. Figure 3 shows a perspective top view of the infusion set according to Figures 1 and 2, with the first connector part (3) connected to the connecting part (2) and the second connector part (4) located away from the connecting part (2).Figure 4 shows a perspective top view and Figure 5 shows a longitudinal section view of the infusion set according to Figures 1 and 2, with the first (3) and second connector part (4) connected to the connecting part (2).

[0039] The connecting part (2) of the infusion set has a septum (2a) which includes a channel (2d) running parallel to the longitudinal axis of the cannula (1a) to form a fluid connection between the connecting part (2) and the cannula (1a) in the base part (1). The septum (2a) extends transversely to the longitudinal axis of the cannula (1a) so that the first supply cannula (3a) of the first connector part (3) can penetrate the septum (2a) to form a fluid connection between the first connector part (3) and the channel (2d) of the connecting part (2). The septum (2a) can close a proximal end of the channel (2d).

[0040] The second connector part (4) comprises the second supply cannula (4a) for connection with the connecting part (2) and comprises the second supply line (4b) for connection with a second infusion device, wherein the septum (2a) of the connecting part (2) extends transversely to the longitudinal axis of the cannula (1a) so that the second supply cannula (4a) of the second connector part (4) pierces the septum (2a) to form a fluid connection between the second connector part (4) and the channel of the connecting part.

[0041] In one embodiment of the invention, the base part (1) and the connecting part (2) can be arranged to rotate relative to each other about the axis of rotation (R) by 360°, or in another embodiment of the invention about the axis of rotation (R) by less than 360°.

[0042] The first connector part (3) and the second connector part (4) can be coupled and uncoupled from the connecting part (2) in such a way that a detachable, in particular a detachable axially fixed and a detachable, in particular a detachable rotationally fixed connection can be made between the first connector part (3) and the second connector part (4) and to the connecting part (2).

[0043] The connecting part (2) has a locking element (2c) in the form of an annular groove, which can form a detachable, in particular detachable axially fixed, connection with a first corresponding locking element (3d) in the form of a first locking ring provided on the first connector part, and which can form a detachable, in particular detachable axially fixed, connection with a second corresponding locking element (4d) in the form of a second locking ring provided on the second connector part (4). The locking connection serves in particular to allow the first (3) and the second connector part (4) to be detachably, in particular detachably axially fixed, coupled and uncoupled from the connecting part (2). Other detachable, in particular detachably axially fixed, connections between the connecting part (2) and the first (3) and the second connector part (4) may also be provided.

[0044] The connecting part (2) has a guide element (2b) which can engage with a first corresponding guide element (3c) provided on the first connector part (3) and which can engage with a second corresponding guide element (4c) provided on the second connector part (4). The guide engagements can be designed as detachable, in particular as detachable rotationally fixed connections. These guide engagements serve in particular to allow the first and second connector parts to be detachably, in particular detachably and rotationally fixed, coupled and uncoupled from the connecting part. The coupling and uncoupling between the first (3) or the second connector part (4) and the connecting part (2) is effected such that a detachable, in particular detachable and rotationally fixed connection about the axis of rotation (R) can be made in each case.

[0045] The guide element (2b) of the connecting part (2) is at least partially polygonal. Furthermore, the first guide element (3c) of the first connector part (3) and the second guide element (4c) of the second connector part (4) are designed as corresponding parts to this partially polygonal connecting part. The connecting part (2) has a polygonal cross-section. The polygon can have n vertices. In this embodiment of the invention, the polygon has eight vertices, although a different number can also be provided. The polygon is designed as a regular polygon. Alternatively, the polygon can be irregular. The sides of the polygon can be parallel and / or oblique to the longitudinal axis of the cannula (1a). The sides of the polygon serve as guides. Reference numerals:

[0046] 1 Basic part

[0047] 1a cannula

[0048] 1b Adhesive plaster

[0049] 2 Connecting part

[0050] 2a Septum

[0051] 2b Guide element

[0052] 2c Latching element

[0053] 2D channel

[0054] 3 first connector part

[0055] 3a first supply cannula

[0056] 3b first supply line

[0057] 3c first guide element 3d first detent element

[0058] 3e Exclusion

[0059] 4 second connector part

[0060] 4a second supply cannula

[0061] 4b second supply line

[0062] 4c second guide element 4d second locking element 4e locking element

[0063] R axis of rotation

Claims

Patent claims 1. Infusion set with a base part (1) with a proximal and a distal side, wherein a cannula (1a) for administering a liquid drug into the patient's body is provided on the distal side of the base part (1), a connecting part (2), wherein the connecting part (2) is inseparably provided on the proximal side of the base part (1) and wherein the connecting part (2) and the base part (1) are rotatably arranged relative to each other about an axis of rotation (R) running parallel to the longitudinal axis of the cannula (1a), a first connector part (3) with a first supply cannula (3a) for connection with the connecting part (2) and with a first supply line (3b) for connection with a first infusion device, a second connector part (4), - wherein the first connector part (3) and the second connector part (4) can be coupled and uncoupled from the connecting part (2) in such a way that a detachable connection is made for the first connector part (3) and the second connector part (4) in a direction transverse to the longitudinal axis of the cannula (1a), characterized in that the connecting part (2) comprises a septum (2a) which has a channel (2d) extending parallel to the longitudinal axis of the cannula (1a) in order to form a fluid connection between the connecting part (2) and the cannula (1a) in the base part (1), and which extends transversely to the longitudinal axis of the cannula (1a) so that the first supply cannula (3a) of the first connector part (3) can penetrate the septum (2a) in order to form a fluid connection between the first connector part (3) and the channel (2d) of the connecting part (2).

2. Infusion set according to claim 1, characterized in that the first connector part (3) and the second connector part (4) can be coupled and uncoupled from the connecting part (2) in such a way that a detachable axially fixed and / or a detachable rotationally fixed connection can be made between the first connector part (3) and the connecting part (2) and between the second connector part (4) and the connecting part (2).

3. Infusion set according to claim 1 or 2, characterized in that a second supply cannula (4a) for connection with the connecting part (2) and a second supply line (4b) for connection with a second infusion device are provided on the second connector part (4) and wherein the septum (2a) of the connecting part (2) extends transversely to the longitudinal axis of the cannula (1a) so that the second supply cannula (4a) of the second connector part (4) can penetrate the septum (2a) to form a fluid connection between the second connector part (4) and the channel (2d) of the connecting part (2).

4. Infusion set according to one of the preceding claims, characterized in that the base part (1) and the connecting part (2) are arranged to be rotatable relative to each other about the axis of rotation (R) running parallel to the longitudinal axis of the cannula (1a) by 360° or by less than 360°.

5. Infusion set according to one of the preceding claims, characterized in that the connecting part (2) has a locking element (2c) which can form a detachable connection, in particular a detachable axially fixed connection, with a first corresponding locking counter-element (3d) provided on the first connector part (3) and which can form a detachable connection, in particular a detachable axially fixed connection, with a second corresponding locking counter-element (4d) provided on the second connector part (4).

6. Infusion set according to one of the preceding claims, characterized in that the connecting part (2) has a guide element (2b) which can engage with a first corresponding guide counter element (3c) provided on the first connector part (3) in order to form a detachable connection, in particular a detachable rotationally fixed connection about the axis of rotation (R) and which can engage with a second corresponding guide counter element (4c) provided on the second connector part (4) in order to form a detachable connection, in particular a detachable rotationally fixed connection about the axis of rotation (R).

7. Infusion set according to claim 6, characterized in that the first (3) and the second connector part (4) can engage with the connecting part (2) in such a way that they can interlock in a form-fitting and detachable manner.

8. Infusion set according to claim 6 or 7, in that the guide element (2d) of the connecting part (2) is at least partially polygonal and the first guide counter element (3c) of the first connector part (3) and the second guide counter element (4c) of the second connector part (4) are designed as corresponding parts to this partially polygonal connecting part (2).

9. Infusion set according to claim 8, characterized in that the base part (1) is circular in shape, and when the first (3) and the second connector part (4) interlock in a form-fitting manner and are releasably interlocked, the base part (1) is substantially covered.

10. Infusion set according to one of the preceding claims, characterized in that the septum (2a) closes a proximal end of the channel (2d).

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