A catheter hub

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, disclose a kind of catheter seat, catheter seat includes seat body, sealing assembly and seat cover, seat body is equipped with main channel;Sealing assembly includes first gasket and second gasket, first gasket includes multiple membrane flaps arranged along the circumference, and first central hole is equipped on second gasket;Second central hole is equipped on seat cover. Among them, seat cover is covered on the proximal end of main channel, and the proximal end of main channel, first gasket, second gasket and seat cover are sequentially abutted;Guide wire can be sequentially arranged in second central hole, first central hole, the gap between multiple membrane flaps, main channel.The catheter seat provided by the utility model, after guide wire is separated from first gasket and second gasket, the membrane flap of first gasket is extruded by blood in main channel and will be deformed and extrude second gasket, and second gasket is deformed and closes first central hole under the extrusion of membrane flap, to reduce the risk of blood flowing outside main channel.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a catheter seat. Background Technology

[0002] Interventional surgery is a minimally invasive technique that, under the guidance of medical imaging, inserts catheters, guidewires, and other instruments into the body through tiny incisions for diagnosis or treatment.

[0003] During the procedure, the catheter needs to be guided through the blood vessel to the target location under the guidance of the guidewire, and the catheter needs to be withdrawn after it has been delivered to the target location.

[0004] In related techniques, to reduce the risk of blood flowing out of the patient's body after the guidewire is withdrawn from the catheter, the catheter is usually connected to a catheter hub. The catheter hub typically includes a hub body, a hub cap threaded to the hub body, and a hemostatic pad located between the hub body and the hub cap. When the guidewire is being delivered into the blood vessel, it passes through the through-hole of the hemostatic pad. After the guidewire is withdrawn from the catheter and catheter hub, the hub cap needs to be rotated to compress the hemostatic pad, closing the through-hole and achieving hemostasis. However, rotating the hub cap increases the procedure time and surgical risk. Utility Model Content

[0005] The purpose of this invention is to provide a catheter seat that effectively reduces the risk of a patient's blood flowing out of the body through the catheter.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A catheter hub is provided, comprising:

[0008] A base, wherein a main channel is provided on the base, and the distal end of the main channel is used to connect to a conduit;

[0009] A sealing assembly includes a first sealing gasket and a second sealing gasket, wherein the first sealing gasket includes a plurality of circumferentially arranged membrane flaps, and the second sealing gasket has a first central hole.

[0010] Seat cover, wherein the seat cover is provided with a second central hole;

[0011] The seat cover is disposed on the proximal end of the main channel, and along the length of the main channel, the proximal end of the main channel, the first sealing gasket, the second sealing gasket, and the seat cover abut against each other in sequence;

[0012] The membrane flap is squeezed by the liquid in the main channel, which can squeeze the second sealing gasket to deform and close the first central hole;

[0013] The multiple membrane flaps can deform and form gaps when pushed by the guide wire, and the guide wire can be sequentially inserted into the second central hole, the first central hole, the gap and the main channel.

[0014] Optionally, one end of the main channel is provided with a recess, and the first sealing gasket and the second sealing gasket are both disposed in the recess, and the seat cover can press the first sealing gasket and the second sealing gasket tightly in the recess.

[0015] Optionally, the end of the second sealing gasket away from the first sealing gasket is provided with a groove that communicates with the first central hole.

[0016] Optionally, the groove includes a disc-shaped groove and a frustum-shaped groove that are connected to each other. The disc-shaped groove, the frustum-shaped groove, and the first central hole are connected in sequence, and the diameter of the first central hole is smaller than the diameter of the disc-shaped groove.

[0017] Optionally, the end face of the second sealing gasket near the first sealing gasket is made into a plane.

[0018] Optionally, the thickness of the first sealing gasket is 1.5 mm, and the radius of the membrane flap is 3 mm;

[0019] And / or, the thickness of the second sealing gasket is 2.5 mm, and the diameter of the first central hole is 2 mm.

[0020] Optionally, the first sealing gasket is made of addition-cured liquid silicone, and / or the second sealing gasket is made of addition-cured liquid silicone.

[0021] Optionally, the flap includes two edge surfaces arranged at an angle, and the two edge surfaces of two adjacent flaps that are opposite each other are abutted.

[0022] Optionally, the seat body and the seat cover are snap-fitted together, or the seat body and the seat cover are threaded together.

[0023] Optionally, the seat body is further provided with a branch channel communicating with the periphery of the main channel. The branch channel is used to connect a suction device, which is used to extract liquid from the main channel.

[0024] Optionally, the angle α between the length direction of the main channel and the length direction of the branch channel is 30°~60°.

[0025] The beneficial effects of this utility model are as follows: The catheter seat provided by this utility model, after the catheter is delivered to the target position through the blood vessel and the guidewire is withdrawn from the catheter seat, that is, after the guidewire is separated from the first sealing pad and the second sealing pad, the membrane flap of the first sealing pad will deform under the pressure of the liquid (e.g., blood) in the main channel and squeeze the second sealing pad. The second sealing pad will also deform under the pressure of the membrane flap and close the first central hole. With the proximal end of the main channel, the first sealing pad, the second sealing pad and the seat cover in sequence, it helps to reduce the risk of the patient's blood flowing out of the main channel through the second sealing pad. It has a hemostatic effect, is stable and reliable, effectively shortens the operation time and reduces the operation risk. Attached Figure Description

[0026] Figure 1 This is an exploded view of the structure of the conduit seat provided by this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the catheter seat provided by this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the first sealing gasket provided by this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the second sealing gasket provided by this utility model;

[0030] Figure 5 This is a schematic diagram of the structure provided by this utility model, showing the first sealing gasket pressing against the second sealing gasket when the first central hole is closed.

[0031] In the picture:

[0032] 100. Seat; 101. Main pipe section; 102. Branch pipe section; 110. Main channel; 111. Settlement; 120. Branch channel; 130. Snap-fit ​​protrusion;

[0033] 200, First sealing gasket; 210, Diaphragm flap; 211, Edge surface;

[0034] 300, Second sealing gasket; 310, First central hole; 320, Groove; 321, Disc-shaped groove; 322, Frustum-shaped groove;

[0035] 400, seat cover; 410, second center hole; 420, snap-fit ​​hole; 430, snap-fit ​​enclosure; 440, opening slot. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] like Figures 1 to 5 As shown, this utility model provides a catheter seat, which includes a seat body 100, a sealing component, and a seat cover 400.

[0041] Specifically, the seat body 100 is provided with a main channel 110, the distal end of which is used to connect to a conduit (not shown); the sealing assembly includes a first sealing gasket 200 and a second sealing gasket 300, the first sealing gasket 200 includes a plurality of circumferentially arranged membrane flaps 210, and the second sealing gasket 300 is provided with a first central hole 310; the seat cover 400 is provided with a second central hole 410. The seat cover 400 is placed on the proximal end of the main channel 110, and along the length of the main channel 110, the proximal end of the main channel 110, the first sealing gasket 200, the second sealing gasket 300 and the seat cover 400 abut against each other in sequence; the diaphragm flap 210 is squeezed by the liquid in the main channel 110, which can squeeze the second sealing gasket 300 to deform and close the first central hole 310; the multiple diaphragm flaps 210 can be deformed and form gaps by the push of the guide wire (not shown), and the guide wire can be sequentially inserted into the second central hole 410, the first central hole 310, the gap and the main channel 110.

[0042] When delivering the catheter, firstly, the catheter hub and the catheter connected to the catheter hub are placed on the guidewire, that is, the guidewire passes through the catheter, the main channel 110, the gap formed between the multiple membrane flaps 210 of the first sealing pad 200, the first central hole 310 of the second sealing pad 300 and the second central hole 410 of the seat cover 400 in sequence; then, under the guidance of the guidewire in the blood vessel, the catheter is delivered to the target position.

[0043] After the catheter is delivered to the target location via the blood vessel and the guidewire is withdrawn from the catheter seat (i.e., after the guidewire is separated from the first sealing pad 200 and the second sealing pad 300), the flap 210 of the first sealing pad 200 deforms under the pressure of the liquid (e.g., blood) in the main channel 110, and compresses the second sealing pad 300. The second sealing pad 300 deforms under the pressure of the flap 210 and closes the first central hole 310. This, along with the proximal end of the main channel 110, the first sealing pad 200, the second sealing pad 300, and the seat cover 400, sequentially abuts against each other, which helps reduce the risk of the patient's blood flowing out of the main channel 110 through the second sealing pad 300. This has a hemostatic effect, is stable and reliable, effectively shortens the operation time, reduces the operation risk, and helps reduce the risk of air entering the blood vessel.

[0044] In some embodiments, the second central hole 410 of the seat cover 400 can not only accommodate guidewires, but also devices such as internal catheters and thrombectomers. These devices can sequentially pass through the second central hole 410, the first central hole 310, the gap, and extend into the main channel 110. The second sealing gasket 300 has good deformability, adapting to the insertion of devices of different diameters, and provides a continuous seal at the first central hole 310. After the device is withdrawn from the catheter seat, the second sealing gasket 300 can rapidly deform under the pressure of the flap 210 and close the first central hole 310, achieving hemostasis and reducing the risk of air entering the blood vessel.

[0045] For example, the guidewire can form a seal with the second sealing pad 300 at the first central hole 310. During the catheter's delivery through the blood vessel to the target location, the seal formed by the guidewire and the second sealing pad 300 at the first central hole 310 provides hemostasis and reduces the risk of air entering the blood vessel, thus lowering surgical risks.

[0046] For example, the centerline of the main channel 110 can be straight.

[0047] In some embodiments, such as Figure 1 As shown, a recessed groove 111 is provided at one end of the main channel 110. The first sealing gasket 200 and the second sealing gasket 300 are both disposed within the recessed groove 111, and the seat cover 400 can press the first sealing gasket 200 and the second sealing gasket 300 tightly within the recessed groove 111. It can be understood that the seat cover 400, the second sealing gasket 300, the first sealing gasket 200, and the bottom of the recessed groove 111 abut against each other in sequence. The recessed groove 111 facilitates the positioning and installation of the first sealing gasket 200 and the second sealing gasket 300 within the seat body 100.

[0048] In some embodiments, such as Figure 4 and Figure 5 As shown, the second sealing pad 300 has a groove 320 communicating with the first central hole 310 at one end away from the first sealing pad 200, so that the second sealing pad 300 is suitable to deform under the compression of the first sealing pad 200. Thus, when the flap 210 is compressed by the liquid in the main channel 110, the second sealing pad 300 can easily deform and close the first central hole 310, which helps to reduce surgical risks.

[0049] In one feasible embodiment, the groove 320 includes a disc-shaped groove 321 and a frustum-shaped groove 322 connected to each other. The disc-shaped groove 321, the frustum-shaped groove 322, and the first central hole 310 are sequentially connected, and the diameter of the first central hole 310 is smaller than the diameter of the disc-shaped groove 321. When the flap 210 is squeezed by the liquid in the main channel 110, causing the first sealing pad 200 to squeeze the second sealing pad 300, the second sealing pad 300 is prone to deformation in the area of ​​the frustum-shaped groove 322 and the first central hole 310, which is beneficial to the closure of the first central hole 310 and reduces the surgical risk.

[0050] In one feasible implementation, the end face of the second sealing gasket 300 near the first sealing gasket 200 is set as a plane so as to be in contact with the membrane flap 210. When the membrane flap 210 is squeezed by the liquid in the main channel 110, the force of the membrane flap 210 acting on the second sealing gasket 300 is more uniform, which is conducive to the closure of the first central hole 310.

[0051] For example, both ends of the first sealing gasket 200 are set as planes.

[0052] For example, the thickness of the first sealing gasket 200 is 1.5 mm and the radius of the membrane flap 210 is 3 mm, so that the membrane flap 210 has good deformation ability, which is beneficial for the second sealing gasket 300 to close the first central hole 310 under the compression of the membrane flap 210.

[0053] For example, the thickness of the second sealing gasket 300 is 2.5 mm and the diameter of the first central hole 310 is 2 mm, so that the second sealing gasket 300 has good support and deformation capacity, which is beneficial for the second sealing gasket 300 to close the first central hole 310 under the compression of the membrane flap 210, and also beneficial for the second sealing gasket 300 to recover its deformation under the compression of the membrane flap 210.

[0054] For example, the first sealing gasket 200 can be made of addition-cure liquid silicone, which is a medical-grade silicone material that is tear-resistant, fatigue-resistant, and has good biocompatibility. For example, the Shore A hardness of the first sealing gasket 200 can be between 20A and 40A.

[0055] For example, the material of the second sealing gasket 300 can be addition-cured liquid silicone. For example, the Shore A hardness of the second sealing gasket 300 can be between 20A and 40A.

[0056] In some embodiments, such as Figure 3 As shown, the flap 210 includes two edge surfaces 211 arranged at an angle, and the two opposing edge surfaces 211 of two adjacent flaps 210 are in contact with each other. In this embodiment, when the guidewire does not pass through the first sealing pad 200 and the second sealing pad 300, the gap of the first sealing pad 200 is closed, that is, the first sealing pad 200 can block the main channel 110, forming a double seal with the second sealing pad 300, which is more conducive to reducing the risk of the patient's blood flowing out of the main channel 110. It can be understood that when the second sealing pad 300 closes the first central hole 310 under the compression of the flap 210, the gap of the first sealing pad 200 can also be closed. Furthermore, even if the blood pressure inside the blood vessel is low, and the first central hole 310 is not completely closed under the compression of the second sealing pad 300 by the flap 210, for example, if the diameter of the first central hole 310 is less than 0.5 mm at this time, the first sealing pad 200 with the gap closed under the limiting constraint of the second sealing pad 300 can also effectively prevent the patient's blood from flowing out of the main channel 110, reducing the surgical risk.

[0057] For example, the first sealing gasket 200 includes three to ten membrane flaps 210. For instance, the first sealing gasket 200 includes four membrane flaps 210 with the gaps shaped like a cross. Or, the first sealing gasket 200 includes eight membrane flaps 210 with the gaps shaped like a star.

[0058] In some embodiments, such as Figure 1 and Figure 2 As shown, the seat body 100 and the seat cover 400 are detachably connected, which facilitates the assembly and disassembly of the first sealing gasket 200 and the second sealing gasket 300.

[0059] In one feasible implementation, the seat body 100 and the seat cover 400 are snapped together for easy assembly and disassembly.

[0060] For example, the seat body 100 is provided with a plurality of snap-fit ​​protrusions 130 at intervals along the circumference of the main channel 110, and the seat cover 400 is provided with a plurality of snap-fit ​​holes 420 along its own circumference. The snap-fit ​​protrusions 130 and the snap-fit ​​holes 420 are arranged in a one-to-one correspondence, and the snap-fit ​​protrusions 130 snap into the corresponding snap-fit ​​holes 420, so that the connection is stable and reliable.

[0061] For example, the seat cover 400 is provided with a plurality of snap-fit ​​plates 430 along its own axial direction, and each snap-fit ​​plate 430 is provided with a snap-fit ​​hole 420. Compared with the seat cover 400 having snap-fit ​​holes 420 on an integrally formed annular plate, the snap-fit ​​plates 430 are more easily deformable, making it easier to assemble and disassemble the seat body 100 and the seat cover 400. It is understood that an opening groove 440 is formed between adjacent snap-fit ​​plates 430.

[0062] In this embodiment, the seat 100 and the seat cover 400 may also be threaded or other detachable connections, which are not limited in this embodiment.

[0063] In some embodiments, the first sealing gasket 200, the second sealing gasket 300, and the seat cover 400 can form an independent module. That is, the first sealing gasket 200 and the second sealing gasket 300 can be assembled inside the seat cover 400. The connection between the seat cover 400 and the seat body 100 can be a Luer connection, which facilitates production and sterilization. Furthermore, depending on surgical needs, the appropriate module model can be replaced to improve applicability. It is understood that the hardness, material, and size of the first sealing gasket 200, and the hardness, material, and size of the second sealing gasket 300, can differ between different module models.

[0064] In some embodiments, such as Figure 1 and Figure 2 As shown, the seat 100 is also provided with a branch channel 120 that communicates with the periphery of the main channel 110. The branch channel 120 can be used to connect to a suction device, which is used to extract fluid from the main channel 110, such as blood clots in blood vessels. After the catheter is delivered to the target location through the blood vessel and the guidewire is removed from the catheter seat, the suction device is activated. The blood in the main channel 110 can still squeeze the first sealing pad 200, so that the second sealing pad 300 closes the first central hole 310 under the pressure of the flap 210. This allows the suction force of the suction device to act on the blood clot, effectively shortening the operation time and reducing the operation risk.

[0065] For example, during aspiration, the thrombectomy device inserts the thrombectomy device into the catheter through the second central hole 410, the first central hole 310, the gap, and the main channel 110. At this time, the thrombectomy device and the second sealing gasket 300 form a seal at the first central hole 310, which helps reduce the risk of the patient's blood flowing out of the main channel 110 through the second sealing gasket 300, thus reducing surgical risks. After the thrombectomy device is withdrawn, the first sealing gasket 200 deforms and closes the gap, and the second sealing gasket 300 deforms and closes the first central hole 310.

[0066] For example, the suction device can be a suction pump. The negative pressure of the suction pump can be -25 inHg to -29 inHg.

[0067] For example, the material of the seat 100 can be a transparent medical polymer material, such as PC material, ABS material, etc., to facilitate observation of the internal condition and fluid state of the seat 100.

[0068] For example, the diameter of the end of the main channel 110 that is connected to the catheter is 0.6 mm to 1.0 mm larger than the diameter of the catheter. The catheter can be inserted into the main channel 110 to achieve an interference fit, so that a good seal is formed between the seat 100 and the catheter, which helps to reduce the risk of thrombus retention at the connection between the catheter and the seat 100.

[0069] For example, the angle α between the length direction of the main channel 110 and the length direction of the branch channel 120 is 30°~60°, for example α=45°, so that the blood in the main channel 110 can still squeeze the first sealing pad 200 when the suction device is activated, thereby causing the second sealing pad 300 to close the first central hole 310 under the compression of the membrane flap 210. In addition, the setting of the included angle α can also reduce fluid resistance and turbulence, which helps to reduce the risk of thrombus retention in the seat 100.

[0070] For example, the base 100 is provided with a male Luer connector at the end of the branch channel 120 away from the main channel 110, which facilitates the assembly and disassembly of the suction device.

[0071] In one feasible implementation, the branch channel 120 can also be used to connect a syringe, which can inject contrast agent into the branch channel 120. When the contrast agent is injected, the liquid in the main channel 110 exerts a greater compressive force on the first sealing gasket 200, and the second sealing gasket 300 is more likely to close the first central hole 310 under the compression of the membrane flap 210, which helps to reduce the risk of contrast agent flowing out of the main channel 110 through the second sealing gasket 300.

[0072] For example, the syringe can be a 60ml syringe.

[0073] In one feasible embodiment, the seat 100 includes a main pipe section 101 and a branch pipe section 102 disposed on the periphery of the main pipe section 101. The main pipe section 101 is provided with a main channel 110, and the branch pipe section 102 is provided with a branch channel 120. The seat 100 may be Y-shaped.

[0074] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A catheter seat, characterized in that, include: A seat (100) is provided with a main channel (110), the distal end of which is used to connect to a conduit; The sealing assembly includes a first sealing gasket (200) and a second sealing gasket (300). The first sealing gasket (200) includes a plurality of circumferentially arranged membrane flaps (210), and the second sealing gasket (300) is provided with a first central hole (310). A seat cover (400) is provided with a second central hole (410). The seat cover (400) is placed on the proximal end of the main channel (110), and along the length of the main channel (110), the proximal end of the main channel (110), the first sealing gasket (200), the second sealing gasket (300) and the seat cover (400) abut against each other in sequence; The membrane flap (210) is squeezed by the liquid in the main channel (110), which can squeeze the second sealing gasket (300) to deform and close the first central hole (310). The multiple membrane flaps (210) can deform and form gaps when pushed by the guide wire, and the guide wire can be sequentially inserted into the second central hole (410), the first central hole (310), the gap and the main channel (110).

2. The catheter seat according to claim 1, characterized in that, One end of the main channel (110) is provided with a recess (111), and the first sealing gasket (200) and the second sealing gasket (300) are both provided in the recess (111). The seat cover (400) can press the first sealing gasket (200) and the second sealing gasket (300) into the recess (111).

3. The catheter seat according to claim 1, characterized in that, The second sealing gasket (300) has a groove (320) at one end away from the first sealing gasket (200) that communicates with the first central hole (310).

4. The catheter seat according to claim 3, characterized in that, The groove (320) includes a disc-shaped groove (321) and a frustum-shaped groove (322) connected to each other. The disc-shaped groove (321), the frustum-shaped groove (322) and the first central hole (310) are connected in sequence, and the diameter of the first central hole (310) is smaller than the diameter of the disc-shaped groove (321).

5. The catheter seat according to claim 1, characterized in that, The end face of the second sealing gasket (300) near the first sealing gasket (200) is set as a plane.

6. The catheter seat according to claim 1, characterized in that, The thickness of the first sealing gasket (200) is 1.5 mm, and the radius of the membrane flap (210) is 3 mm; And / or, the thickness of the second sealing gasket (300) is 2.5 mm, and the diameter of the first central hole (310) is 2 mm.

7. The catheter seat according to claim 1, characterized in that, The first sealing gasket (200) is made of addition-cured liquid silicone, and / or the second sealing gasket (300) is made of addition-cured liquid silicone.

8. The catheter seat according to claim 1, characterized in that, The flap (210) includes two edge surfaces (211) arranged at an angle, and the two edge surfaces (211) of two adjacent flaps (210) are attached to each other.

9. The catheter seat according to claim 1, characterized in that, The seat (100) and the seat cover (400) are snapped together, or the seat (100) and the seat cover (400) are threaded together.

10. The catheter seat according to any one of claims 1-9, characterized in that, The seat (100) is also provided with a branch channel (120) that communicates with the periphery of the main channel (110). The branch channel (120) is used to connect to a suction device, which is used to extract liquid from the main channel (110).

11. The catheter seat according to claim 10, characterized in that, The angle α between the length direction of the main channel (110) and the length direction of the branch channel (120) is 30°~60°.

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