Connection mechanism for a detachable, fluid-tight connection between two medical devices

Description

[0001] The invention relates to a connection mechanism for a detachable fluid-tight connection of two medical devices.

[0002] The percutaneous insertion of a medical device into a patient's blood vessel is associated with risks, and a variety of techniques exist for inserting the device into the vessel or body. Common techniques include the Seldinger technique.

[0003] In each of these procedures, the flow of bodily fluids must be controlled when the medical device is inserted into the blood vessel. Particular care must be taken during insertion into the circulatory system. Positive vascular pressure can cause blood to leak from the medical device. This leaking blood contaminates the surrounding area and can also pose an infection risk to the physician. Negative vascular pressure poses a risk of air embolism to the patient.

[0004] Accordingly, medical valves such as hemostatic valves, iris valves, laparoscopic ports, or the like are used to limit or prevent blood loss and air intake during the procedure.

[0005] Furthermore, medical devices must be rinsed with NaCl solution when used inside the body, or medications are introduced into the body in liquid form through them; in this application, fluid tightness must also be ensured.

[0006] Introductory sheaths are themselves medical devices and are used in conjunction with other medical devices such as dilators and cartridges to introduce surgical instruments, implants, or drugs into the body and / or the vascular system of a patient (typically an artery). Introductory sheaths are designed to penetrate the skin and the wall of the blood vessel and can be partially positioned within the blood vessel, allowing surgical instruments to be introduced and advanced from outside the body through the sheath. Maintaining a seal against the surrounding environment is particularly challenging in this process.

[0007] When connecting two or more medical devices, there is a risk of them shifting relative to each other. This shifting can occur unintentionally or due to inadequate securing of the devices. Such shifting can injure blood vessels or surrounding tissue. Furthermore, the position of the devices may change, making it impossible to insert implants or medications. Additionally, the shifting can compromise or even open the seal between the medical devices, potentially leading to the unintended leakage of bodily fluids.

[0008] EP 2569044 B1 describes an insertion sheath with a hemostatic valve that can maintain hemostasis around surgical instruments with a variety of cross-sectional diameters during surgical procedures.

[0009] US 6551283 B1 discloses medical devices and instruments with hemostasis valves and hemostasis cannula units. The hemostasis valve has two separate valve elements, a valve seal, and a complementarily shaped valve diaphragm.

[0010] US 9616213 B2 applies to medical devices with adjustable hemostatic valves and systems.

[0011] US Patent 9884175 B2 shows a medical valve arrangement comprising a tube extending between a proximal and a distal tube end.

[0012] US 2019 / 0070394 A1 discloses an expandable insertion device and methods for its use.

[0013] US 2018 / 0256876 A1 shows a medical valve with a variable diameter seal.

[0014] US patent 2019 / 117951 A1 shows a medical connector. The connector comprises a tubular male connector unit, an engagement unit located on the outside of the male connector unit, and a locking mechanism configured to prevent the locking unit from moving in a predetermined state.

[0015] CN 106 492 314 A relates to the field of medical instruments, in particular disclosing a type of injection device and quick-coupling structure.

[0016] US 2016 / 015941 A1 shows a catheter assembly.

[0017] The object of the present invention is to provide a connection mechanism for a detachable fluid-tight connection of two medical devices with increased patient safety.

[0018] The task is accomplished by a connection mechanism for a detachable fluid-tight connection of a first

[0019] A cable section of a first medical device is connected to a second cable section of a second medical device according to claim 1. The first cable section extends along a first cable axis, and the second cable section extends along a second cable axis. Furthermore, a locking element is provided, fixedly arranged on the first cable section, which is configured to engage with a corresponding locking element on the second cable section in a locking position. Additionally, a locking element is provided, which is slidably movable on the first cable section between a release position and a locking position.The locking element is movable in such a way that in the locking position it acts against the detent element, so that the detent element is locked to the counter-detent element in the detent position and that in the release position it releases the detent element, so that the detent element can be released from the detent position.

[0020] This design enables a secure and reliably connected and disconnectable link between two medical devices. Accidental slippage of one medical device onto another is thus prevented, thereby increasing patient safety. Connecting the tubing sections also creates a fluid-tight seal, preventing the leakage of fluids such as blood, other bodily fluids, or medications. Even under increased internal pressure within the tubing sections, the connection remains secure and leak-proof, as the locking mechanism and the action of the locking element prevent the two tubing sections from moving apart. Furthermore, this connection mechanism enhances patient safety when used with an introducer sheath and dilator, particularly during vascular procedures when advancing the introducer sheath with the dilator.

[0021] Using a connection mechanism according to the invention, pipe sections with larger diameters than those in the prior art can also be connected. Inner diameters of pipe sections greater than eleven French can be connected securely and fluid-tight.

[0022] According to the invention, the locking element comprises at least one elastically compliant deflection section extending obliquely to the first conductor axis and a locking section extending substantially perpendicular to the first conductor axis. The deflection section is conical, at least in part. The locking section is arranged on the free section of the deflection section, thereby forming a radial surface. The locking section also has a partially cylindrical surface, which may extend, in particular, parallel to the first conductor axis. Preferably, the deflection section and the locking section are formed integrally. Furthermore, the locking element can be formed integrally with the conductor section or connected to the conductor section in another manner, such as by bonding. It is also conceivable that the deflection section and / or the locking section are subdivided into segments that surround the conductor section.The elastic compliance of the deflection section makes it possible, in particular, for the connection of the first and second medical devices to be repeatedly detachable and reconnected.

[0023] It is conceivable that the locking element, in the locked position, acts against the deflection section in such a way that its elastic compliance is limited. In particular, the elastic compliance can be limited radially outwards, so that the latched state of the locking element is locked. This provides a reliable method of securing the connection mechanism.

[0024] According to the invention, the locking element has an inner cone section that is at least partially conical and which acts against the deflection section in the locked position. The inner cone acts on the outside of the deflection section in such a way that the compliance is limited radially outwards. The outside of the area of ​​the inner cone of the locking element can also be correspondingly partially conical to create a thin-walled structure. A solid cone and / or surfaces running obliquely to the axis as the inside of the locking element are also conceivable.

[0025] Advantageously, the locking element has an actuating section that is at least partially cylindrical. This actuating section is designed to allow manual movement of the locking element. It may also have finger recesses for improved handling.

[0026] A spring element is particularly preferred, which pushes the locking element towards the detent element. The locking element is thus preferably forced into the locked position, where it remains. To move it into the release position, it must be moved against a force applied by the spring element. It is also conceivable that the locking element is pushed away from the detent element, so that it remains in the release position. In particular, the spring element can be designed as a helical spring or as an elastomer. Furthermore, it is conceivable that the spring element is formed integrally with the locking element. Preferably, the spring element is arranged between the actuating section and the pipe section. By applying spring pressure to the locking element towards the detent element, reliable securing and defined positioning of the fluid-tight connection are achieved.

[0027] Preferably, the first pipe section is designed such that, in the locked position, it projects at least partially into the second pipe section. This ensures a fluid-tight connection between the two pipe sections. In particular, the end of the second pipe section can be closed by a valve element that is penetrated by the first pipe section, thus achieving a fluid-tight connection to the environment.

[0028] The connection mechanism preferably comprises a counter-locking element fixedly arranged on the second pipe section, which is configured to lock into the locking element provided on the first pipe section in the locking position. Preferably, the counter-locking element can be configured to correspond to the locking element. The possibility of locking the locking element into the counter-locking element ensures a secure and fluid-tight connection.

[0029] According to the invention, the counter-locking element has a double cone with a first cone section that is at least partially conical and a second cone section that is at least partially conical.

[0030] According to the invention, the first conical section widens to a maximum diameter along the second axis of the conductor, and the second conical section connects to this maximum diameter and then decreases to a smaller diameter along the same axis. The first and second conical sections are preferably designed as truncated cones. It is conceivable that the smallest diameter of the second conical section is larger than the smallest diameter of the first conical section. By designing the locking element as a double cone, the locking element can be elastically deformed in the area of ​​the deflection section during the connection process and can at least partially return to its original shape once the locking position is established. Furthermore, the double cone design is advantageous because a connection can be established regardless of the rotational position of the load element and the locking element.

[0031] It is conceivable that a cylindrical section, at least partially cylindrical, adjoins the second conical section. This cylindrical section is suitable for the defined locking of the cylindrical inner surfaces of the locking section.

[0032] Preferably, the locking section interacts with the second conical section in the locking position or with the cylinder section. The second conical section and / or the cylinder section can be designed such that the locking element is elastically deformed in the locking position, thereby applying a force that maintains the connection.

[0033] According to the invention, the locking element rests against the counter-locking element in the locked position, and the deflection sections rest at least partially against the first cone section. By ensuring a defined contact of the inner surfaces against the first cone section in the locked position, the connection can be further secured, thus preventing even the smallest movements between the locking element and the counter-locking element during use of the medical devices.

[0034] It is conceivable that a housing section is provided which is arranged on the second pipe section or forms the second pipe section itself, with the locking element being arranged on the housing section. It is further conceivable that hemostatic valve elements are provided in the housing section, the design being such that, in the locked position, the first pipe section penetrates at least partially into the second pipe section and passes through the hemostatic valve elements. Furthermore, the valve elements seal the second pipe section fluid-tight against the environment when the second pipe section is not connected to the first pipe section. The valve elements can be designed as silicone discs with star-shaped or other cutouts, the cutouts not impairing the sealing effect but ensuring a defined penetration of the first pipe section.Preferably, at least two valve elements are provided in the housing section. It is further preferred that the valve elements are arranged rotated relative to each other about the second line axis. This further improves the fluid-tight connection.

[0035] Further details and advantageous embodiments of the invention can be found in the following description, which provides further description and explanation of exemplary embodiments of the invention.

[0036] They show: Figure 1: a first conductor section with a detent element and a locking element of a locking mechanism from the side; Figure 2: the arrangement of the according to Figure 1 from behind; Figure 3: the arrangement according to Figure 1 into the locking element from the front; Figure 4: the arrangement according to Figure 1 with the locking element in the locked position; Figure 5: the arrangement according to Figure 3 with the locking element in the release position; Figure 6: the arrangement according to Figure 3 with longitudinally cut locking element; Figure 7: a counter-locking element of the locking mechanism from the front; Figure 8: the counter-locking element cut in side view with a housing section and a second line section; Figure 9: hemostatic valve elements in the housing section; Figure 10: the first line section connected to the second line section with the locking element in the locked position; Figure 11: the arrangement according to Figure 10 with the locking element in the release position; Figure 12: the counter-locking element arranged on an insertion sleeve; Figure 13: the locking element arranged on a dilator; Figure 14: a cartridge with the locking element and the counter-locking element arranged at opposite ends of a line section; and Figure 15: the insertion sleeve according to Figure 12 connected to the cartridge by means of the connection mechanism according to Figure 14 .

[0037] In Figure 1 and Figure 2A first conductor section 10 with a locking element 12 is shown in a side view and a rear view. The locking element 12 surrounds a latching element 14 which is fixedly arranged on the first conductor section 10 and which is located in the Figures 3 to 6 shown in various views. The first conduit section 10 is arranged along a first conduit axis 16 and can be part of a first medical device, as is the case, for example, in the Figure 13 , 14 and 15 shown with reference numbers 400 and 500.

[0038] The first conductor section 10 protrudes from the front face 15 of the arrangement of the locking element 12 and latching element 14. The locking element 12 is composed of two connectable parts 18 and 20; however, it is also conceivable to construct the locking element 12 from more than two parts or as a single piece (not shown). The parts 18 and 20 are designed as half-shells that each surround half of the conductor section 10 and are positively connected to each other by means of a clip connection 22. A separation point 24 is provided between the two parts 18 and 20, which is located in a plane in which the first conductor axis 16 lies. The parts 18 and 20 can also be joined together by adhesive bonding (not shown).

[0039] The locking element 12 is displaceable along the axis 16. For manual displacement, grip recesses 28 are provided in a cylindrically designed actuating section 26. With these grip recesses 28, the operator, e.g., a doctor, can safely actuate and displace the locking element 12. Furthermore, an outer conical section 30 is provided, which corresponds to a conical inner section 32, which is located in the Fig. 4, 5 and 6 shown is to make the locking element 12 slim and light and to increase ergonomics.

[0040] Figure 3 Figure 1 shows the arrangement of the first conductor section 10 with the locking element 14 and the locking element 12 in a front view along the axis 16 into the locking element 12. The locking element 14 has an elastically compliant deformation section 40 and a locking section 42, which is also located in the Fig. 4, 5 and 6As shown in the figure. In this embodiment, the locking section 42 and the deformation section 40 are formed in one piece, although it would also be conceivable to form the deformation section 40 and the locking section in two pieces and / or from different materials. The locking section 42 extends radially away from the axis 16 and forms a surface 44 facing the front 15. Furthermore, the locking section 42 has an inner contour 46, which can be, in particular, lip-like. The locking section 42 and the deformation section 40 are divided into four segments, which are arranged evenly around the axis 16. However, it would be conceivable to provide only one segment, two, or more than four segments and / or to arrange the segments not evenly around the axis 16.

[0041] One view according to Figure 1 , however, without the half-shell 18 of the locking element 12 is in Figure 4The locking element 14 is shown on the first conductor section 10 and surrounded by the locking element 12. A cylindrical section 48 is arranged adjacent to the deformation section 40. The locking element 14 is fixedly attached to the first conductor section 10 by this section 48, particularly by adhesive bonding. A helical spring 50 is shown surrounding the section 48. The helical spring 50 rests on one side against a contact section 52 on the locking element 12, facing away from the front 15, and on the other side against a circumferential collar 54 on the cylindrical section 48 of the locking element 14. The helical spring 50 is such that it forces the locking element 12 into a locking position against the locking element 14.In the locked position, the inner section 32 rests at least partially against an outer conical section 56 of the deflection section 40 and restricts or prevents the elastic deformability of the deflection section 40 radially outwards. Furthermore, the deflection section 40 has an inner conical section 58.

[0042] Figure 5 shows the view according to Figure 4However, with the locking element 12 in the release position. The helical spring 50 is compressed, and the locking element 12 is retracted away from the front face 15 along the axis 16. Other spring elements are conceivable instead of the helical spring 50. For example, a spring element can also be formed integrally with the locking element 12 or the detent element 14 (not shown). In the release position, the inner section 32 does not rest against the outer cone section 56, so that the deflection section 40 can be deflected elastically radially outward according to the dashed lines 60. For this purpose, the entire deflection section 40 can be deformed, or the deflection section 40 can form a solid hinge in the area of ​​the transition 62 into the section 48. Window-like material recesses 64 are provided in the area of ​​the deflection section 40, so that only thin webs 66 remain, which contribute to the deformability.Furthermore, instead of the conical areas 32, 56, 58 and partially rotationally symmetrical geometries of the deflection section 40 and the locking element 12, simple corresponding surfaces running obliquely to the axis 16 are also conceivable (not shown).

[0043] The Figure 6 shows a view according to Figure 4 , wherein the locking element 14 is cut. The inner contour 42 on the locking section 42 is clearly shown. This is preferably rounded at the edges 68, 70 facing towards and away from the front face 15 to prevent sliding over surfaces of a corresponding counter-locking element 84 (in Figure 7 and 8 to improve (as shown).

[0044] A counter-locking element 84 is shown in various views and sections in the Figures 7 to 9 shown. A view of a front face 80 into the counter-locking element 84 surrounding a second conductor section 82 is shown in Figure 7The second conductor section 82 is formed along a second conductor axis 86, wherein the second conductor section 82 can be part of a second medical device or is partially formed by the medical device and / or by the counter-locking element 84.

[0045] The second medical device is in Figure 12 in the form of an insertion lock 300 and in Figure 14 shown in the form of a 500 cartridge. Also shown are the 300 insertion sleeve and the cartridge in Figure 15 The two sections are shown connected together. Hemostatic valve elements 88 are arranged in the pipe section 82 for sealing the second pipe section 82.

[0046] Figure 8Figure 1 shows a longitudinal section through the locking element 84 and a housing section 90 on which the locking element 84 is arranged. The locking element 84 has a first conical section 92 that widens from the front face 80 along the axis 86 from the diameter D of the conductor section 82 to a maximum diameter 94. However, the minimum diameter 96 of the first conical section 92 can also be larger than the diameter D. Directly adjacent to the maximum diameter 94 is a second conical section 98. This second conical section 98 tapers along the axis 86 to a minimum diameter 100. A cylindrical section 102 with a diameter of 100 adjoins this. Instead of the first conical section 92, the second conical section 98, and the cylindrical section 102, other non-rotationally symmetrical geometries are also conceivable, for example, surfaces running obliquely to the axis 86 (not shown).

[0047] The locking element 84 can be arranged on the housing section 90 by means of a connecting element 104. The connecting element 104 can, in particular, be a thread; other connection types such as clips or clamps are conceivable. Furthermore, the valve elements 88 can be fluid-tightly clamped to the housing section 90 by assembling, in particular by screwing or clamping, the locking element 84. At least one valve element 88, but preferably two valve elements 88, is provided to ensure a reliable seal.

[0048] Figure 9Figure 1 shows various hemostatic valve elements 88 arranged in the housing section 90, with the counter-locking element 84 unscrewed and not shown. Pin-like elements 106 are provided in the housing section 90 to prevent rotation of the valve elements 88, corresponding to holes 108 in the valve elements 88. The valve elements 88 have self-sealing passages 110 in the area of ​​the second line section 82 around the axis 86, allowing the first line section 10 or other medical devices 400, 500a to pass through in a fluid-tight manner. The openings can be designed as perforations 112 or star-shaped openings 114. Furthermore, the valve elements 88 can be arranged offset along the axis 86 to ensure a further improved seal.

[0049] Figure 10Figure 1 shows a longitudinal section with the first conduit section 10, which is fluid-tightly connected to the second conduit section 82 by the connection mechanism 200. The locking element 14 is in the locked position with the counter-locking element 84. The inner cone section 58 rests against the first cone section 92. The locking section 42 rests with its inner contour 46 against the cylindrical section 102. The deformation section 40 may be deformed in the locked position, as its diameter 100 may be larger than the diameter of the inner contour 46. The locking element 12 is pressed by the spring 50 against the outer cone section 56 of the deformation section 40, so that further deformation of the deformation section 40 is not possible. The connection is therefore non-releasable and does not allow any movement along the axes 16, 86 relative to the conduit sections 10, 82.

[0050] Due to the at least partially rotationally symmetrical design of the locking element 14, the counter-locking element 84, and the locking element 12, the components 12, 14, and 84 can be rotated relative to each other about the axes 16 and 86, even when the connection mechanism 200 is in the locked position and the connection is established. The connection remains fluid-tight even when rotated. This is advantageous when the position needs to be changed in the inserted state within the body. Furthermore, the connection 200 can be made and released independently of its rotational position about the axes 16 and 86. The first line axis 16 is coincident with the second line axis 86 in the area of ​​the connection mechanism 200. The first line section 10 projects into the second line section 82 and penetrates the valve elements 88, which can be penetrated and / or displaced into a cavity 202.This improves the seal and simplifies the insertion of the first service section 10. The valve elements 88 bear at least partially against the outer surface 204 of the first service section 10 with the passages 110 and seal the connection to the environment 206. A second cavity (not shown) could be provided on the opposite side of the cavity 202, facing the front 80. This second cavity would simplify the removal of the first service section 10 when disconnecting the connection and reduce wear on the valve elements 88.

[0051] In Figure 11 is the view according to Figure 10 shown, but with the locking element 12 moved into the release position. The spring 50 is compressed. To release the connection, the locking element must be moved from the locked position to the release position in the direction of arrow 208, as shown in the illustration. Figure 10The locking element can be displaced. The grip recesses 28 and / or the actuating section 26 are suitable for pulling the locking element. This releases the detent element 12. If it is pulled further in the direction of 208, the deflection section 40 is elastically deflected radially outwards along the lines 60 by the surface contact of the inner contour 46 and the second conical section 98, and the connection is released from the detent position. As soon as the detent section 42 with the inner contour 46 has overcome the maximum diameter 94, the deflection section 40 returns to its initial position accordingly. Figure 4 If the lever is pulled further in the direction of 208, the first pipe section 10 slides out of the second pipe section 82 and the valve elements 88, and the connection is severed. In the severed state, the second pipe section 88 is sealed against the environment 206 by the valve elements 88.

[0052] For further improved handling, grip recesses 210 are also provided on the housing section 90. This is advantageous if the housing section 90 is attached to or forms part of a medical device and is inserted into the body, and should not be pulled out when the connection is disconnected. To establish the connection, the first cable section 10 must first be inserted into the second cable section 86 in the counter-locking element 84 in the opposite direction 208. Then, the locking element 12 must be retracted into the release position in the direction of arrow 208, thus enabling the deflection section 40 to deform. The deflection section 40 is deformed by the first conical section 92 and at least partially released into the locking position by the second conical section 98.Once the detent element 14 is in the detent position, the locking element 12 can be released, so that the spring 50 forces it against the detent element 14 into the locking position, thus locking it as described. To further improve the handling of the connection mechanism 200, it is conceivable that the arrangement of the locking element 12, detent element 14, and spring 50 is coordinated in such a way that the locking element 12 does not need to be retracted to establish the connection. In such a design, sliding the detent element 14 onto the first conical section 92 causes both a deformation of the detent element 14 and a displacement of the locking element 12, so that retracting the locking element 12 beforehand is unnecessary. However, the locking element 12 must be retracted to disconnect the connection.This can be achieved by different angles α of the first cone section 92 and angle β of the second cone section 98 with respect to the axis 86.

[0053] Figure 12Figure 1 shows a second medical device in the form of an insertion sheath 300 with housing section 90, valve elements 88, and a locking element 84. The second line section 82 is partially formed by the locking element 84 and the housing section 90. An insertion tube 302 is arranged on the housing section 90 facing away from the front 80 of the locking element 84. This insertion tube extends the line section 86 to its end 304. The line section 86 opens into an opening 306 at its free end 304. The insertion tube 302 can have different lengths and inner diameters depending on the purpose. Furthermore, it can be pre-formed for the desired application and be rigid or flexible. A branch 308 from the line section 86 is provided in the housing section 90, to which a three-way valve 310 is attached. The three-way valve 310 can be used to flush line section 86, introduce active ingredients, and suction and aspiration of liquids.

[0054] In Figure 13 The first medical device is a dilator 400 with a dilator body 402 and a tip 404 for widening a channel in tissue during insertion into a body. The locking element 14 and the locking element 12 are arranged on the dilator body 402, which forms the first conduit section 10. A Luer connector 406 is also arranged on the locking element 14, which extends the conduit section 10. The conduit section 10 is continuous from the Luer connector 406 to the tip 404. A syringe for injection, particularly for irrigation, can be connected to the Luer connector 406 (not shown). Furthermore, a guide wire (not shown) can be inserted into the conduit section 10 of the dilator 300 for insertion into a body.

[0055] The dilator 400 is designed to be connected to the insertion sheath 300 using the connection mechanism 200, enabling the insertion sheath 300 to be safely inserted into the body. The dilator 400 also prevents the insertion tube 302 from kinking during insertion. After insertion, the dilator 300 can be safely detached from the insertion sheath 300 using the connection mechanism 200 and withdrawn without any leakage of body fluids or risk of air embolism.

[0056] Figure 14Figure 1 shows a cartridge 500 comprising a first medical device 500a and a second medical device 500b. One end forms the first medical device 500a and the other end forms the second medical device 500b, with the locking element 14, the locking element 12, the counter-locking element 84, and the housing section 90 all arranged on a common conduit section 502. For the conduit section 502, the conditions described for conduit section 10 apply in the region of the locking element 14, and for the region of the housing section 90 and counter-locking element 84, the conditions described for conduit section 82 apply. The cartridge 500 is suitable for connection to the insertion port 300 by means of the connection mechanism 200. The cartridge 500 can hold active substances or implants in the line section 502, which can be introduced into the body at a specific anatomical position using the insertion sheath 300.Such a cartridge 500 with components of the connection mechanism 200 makes it possible to connect further medical devices such as another cartridge 500 and thus extend the insertion sluice 300 fluid-tight against the environment 206.

[0057] Figure 15 The cartridge 500 is shown, which is connected to the insertion port 300 by means of the connection mechanism 200. The locking element 14 is in the locked position. The common line section 502 can be seen as the first line section 10 and is fluid-tight and securely connected to the second line section 86. To release the connection, the following applies: Figures 10 and 11As stated above, it is evident that a further first medical device 500a, 400, comprising an arrangement of a locking element 14, a locking element 12 and a line section 10, can be arranged on the free locking element 84 at the proximal end of the cartridge 500 on the second medical device 500b. It is also conceivable that two or more cartridges 500 can be connected to each other and arranged one behind the other.

[0058] The connection mechanism 200 shown allows for the fluid-tight and secure connection and disconnection of various medical devices, such as an introducer sheath 300, a dilator 400, and / or a cartridge 500. Furthermore, the connection can be established, disconnected, and / or the medical devices can be rotated relative to each other, regardless of the rotational position of the medical devices with respect to their axes 10, 86, and 502. This increases patient safety when medical devices 300, 400, and 500 are used with the connection mechanism 200.

Claims

1. A connection mechanism (200) for releasable fluid-tight connection of a first line portion (10), extending along a first line axis (16), of a first medical appliance (400, 500a) to a second line portion (82), extending along a second line axis (86), of a second medical appliance (300, 500b), the connection mechanism (200) comprising a first line portion (10) which extends along a first line axis (16) and has an engagement element (14), which is arranged so as to be stationary on the first line portion (10), and a second line portion (82) which extends along a second line axis (86) and has a counter-engagement element (84), wherein the engagement element (14) is designed to engage with the counter-engagement element (84), provided on the second line portion (82), in an engagement position, the connection mechanism (200) further comprising a locking element (12), which can be displaced on the first line portion (10) and is movable between a release position and a locking position such that, in the locking position, the locking element (12) acts counter to the engagement element (14) so that, in the engagement position, the engagement element (14) is locked on the counter-engagement element (84) and such that, in the release position, the locking element (12) releases the engagement element (14) so that the engagement element (14) can be released from the engagement position, wherein the engagement element (14) has at least one resiliently flexible deflection portion (40) which is at least partially conical and extends obliquely to the first line axis (16) and an engagement portion (42) which extends substantially perpendicularly to the first line axis (16), wherein the locking element (12) has an inner cone portion (32) which is at least partially conical and acts against the deflection portion (40) in the locking position, wherein the counter-engagement element (84) has a double cone comprising a first cone portion (92) which is at least partially conical and a second cone portion (98) which is at least partially conical, wherein the first cone portion (92) widens to a maximum diameter along the second line axis (86) and the second cone portion (98) adjoins the maximum diameter and decreases to a smaller diameter along the second line axis (86), and wherein, in the engagement position, the engagement element (14) rests against the counter-engagement element (84) and the deflection portion (40) rests at least partially against the first cone portion (92).

2. The connection mechanism (200) according to claim 1, wherein, in the locking position, the locking element (12) acts against the deflection portion (40) in such a way that its resilient flexibility is limited.

3. The connection mechanism (200) according to any of the preceding claims, wherein the locking element (12) has an actuating portion (26) which is at least partially cylindrical.

4. The connection mechanism (200) according to any of the preceding claims, wherein a spring element (50) is provided that urges the locking element (12) toward the engagement element (14).

5. The connection mechanism (200) according to claim 4, wherein the first line portion (10) is designed such that in the engagement position, it protrudes at least partially into the second line portion (82).

6. The connection mechanism (200) according to any of the preceding claims, with a counter-engagement element (84) which is arranged so as to be stationary on the second line portion (82) and is designed to engage with the engagement element (14) provided on the first line portion (10) in the engagement position.

7. The connection mechanism (200) according to any of the preceding claims, wherein an at least partially cylindrical cylinder portion (102) adjoins the second cone portion (98).

8. The connection mechanism (200) according to any of the preceding claims, wherein, in the locking position, the engagement portion (42) interacts with the second cone portion (98).

9. The connection mechanism (200) according to claim 7, wherein, in the locking position, the engagement portion (42) interacts with the cylinder portion (102).

10. The connection mechanism (200) according to any of the preceding claims, wherein a housing portion (90) is provided which is arranged on the second line portion (82) or forms the second line portion (82), wherein the counter-engagement element (84) is arranged on the housing portion (90), wherein hemostatic valve elements (88) are provided in the housing portion (90), and wherein the design is such that, in the engagement position, the first line portion (10) penetrates at least partially into the second line portion (82) and penetrates the hemostatic valve elements (88).