Medical catheter assembly and method of manufacturing the same

Abstract

The application relates to the technical field of medical devices, in particular to a medical catheter assembly and a manufacturing method thereof. The medical catheter assembly comprises a single-lumen tube, a tube base and a fixing sleeve, the tube base is provided with a tube cavity, the fixing sleeve is arranged in the tube cavity, the first end of the single-lumen tube is sleeved on the fixing sleeve, and a fixing structure is arranged between the tube cavity and the outer wall of the fixing sleeve, which is used for limiting the axial movement of the fixing sleeve and pressing the first end of the single-lumen tube. The medical catheter assembly provided by the application is characterized in that the first end of the single-lumen tube is sleeved on the fixing sleeve, the fixing sleeve is arranged in the tube cavity of the tube base, and the fixing structure is arranged between the tube cavity and the outer wall of the fixing sleeve, which can limit the axial movement of the fixing sleeve and press the first end of the single-lumen tube, thereby realizing the effective connection between the single-lumen tube and the tube base and preventing the single-lumen tube from falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a medical catheter assembly and a manufacturing method thereof. Background Art

[0002] Catheters are essential instruments during interventional procedures. They include catheter sheaths, angiographic catheters, guide catheters, microcatheters, and many other tubing devices used for access or diagnosis and treatment. Most are composite tubing. These tubing typically consists of an inner tube, a braided intermediate layer, and an outer tube. To minimize resistance within the lumen, the inner tube is typically made of PTFE (polytetrafluoroethylene).

[0003] In existing technologies, PTFE single-lumen tubing is widely used in interventional medical devices to reduce costs and provide excellent smoothness for both the inner lumen and the surface of the catheter. However, due to the highly symmetrical molecular structure and low surface energy of PTFE, when used as a medical catheter, it is difficult to achieve a strong and effective connection with the catheter socket (typically made of polypropylene, polycarbonate, or nylon) using methods such as direct gluing, plasma etching followed by gluing, or insert molding. The PTFE tubing is prone to detachment under high tension.

[0004] Therefore, the existing medical catheter assembly needs to be improved. Summary of the Invention

[0005] The present invention provides a medical catheter assembly and a manufacturing method thereof, which are used to solve the defects of weak connection strength and easy falling off between the medical catheter and the tube seat in the prior art, realize the effective connection between the single-lumen tube and the tube seat, and prevent falling off.

[0006] In one aspect, the present invention provides a medical catheter assembly, comprising: a single-lumen tube, a tube seat, and a fixed sleeve, wherein the tube seat is provided with a tube lumen, the fixed sleeve is disposed within the tube lumen, the first end of the single-lumen tube is sleeved on the fixed sleeve, and a fixing structure is provided between the tube lumen and the outer wall of the fixed sleeve, the fixing structure being used to limit axial movement of the fixed sleeve and to compress the first end of the single-lumen tube.

[0007] According to the medical catheter assembly provided by the present invention, the fixing structure includes a plurality of anti-slip teeth arranged at intervals along the first direction on the outer wall of the fixing sleeve and a plurality of anti-slip grooves arranged at intervals along the first direction in the lumen, and the anti-slip teeth match the anti-slip grooves.

[0008] According to the medical catheter assembly provided by the present invention, a plurality of sealing rings are provided on the outer wall of the fixing sleeve at intervals along the first direction.

[0009] The medical catheter assembly provided according to the present invention further includes a hemostatic gasket, which is arranged in the tube cavity.

[0010] The medical catheter assembly provided according to the present invention further includes a screw cap, which is threadedly connected to one end of the tube seat. The screw cap is provided with a pushing portion, which is used to apply thrust to the hemostatic gasket when the screw cap is tightened on the tube seat.

[0011] According to the medical catheter assembly provided by the present invention, a retaining ring is provided between the pushing portion and the hemostatic gasket.

[0012] According to the medical catheter assembly provided by the present invention, the first end of the fixing sleeve is provided with a flared opening.

[0013] The medical catheter assembly provided according to the present invention further includes a bypass tube and a three-way valve, one end of the bypass tube is communicated with the lumen, and the other end of the bypass tube is communicated with the three-way valve.

[0014] The medical catheter assembly provided by the present invention further comprises a thrombus breaking device, which can pass through the lumen and the single-lumen tube and reach the thrombus lesion site to break and remove the thrombus.

[0015] Another aspect of the present invention provides a method for manufacturing the medical catheter assembly as described in any one of the above items, comprising:

[0016] Sleeve the sealing ring on the outer wall of the fixing sleeve;

[0017] The first end of the single-lumen tube is sleeved on the fixing sleeve to form a first component;

[0018] The first component is placed in a tube seat mold and injection molding is performed in the tube seat mold. During the process of forming the tube seat, the injection molding liquid squeezes the single-lumen tube so that the single-lumen tube fits against the outer wall of the fixing sleeve, and causes the sealing ring to produce a set degree of extrusion deformation, so that it continuously maintains tension on the single-lumen tube.

[0019] In the medical catheter assembly provided by the present invention, the first end of the single-lumen tube is sleeved on the fixing sleeve, and the fixing sleeve is arranged in the tube lumen of the tube seat. Since a fixing structure is provided between the tube lumen and the outer wall of the fixing sleeve, the fixing structure can limit the axial movement of the fixing sleeve and press the first end of the single-lumen tube, thereby achieving an effective connection between the single-lumen tube and the tube seat and preventing the tube from falling off.

[0020] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 1 is a schematic diagram of the three-dimensional structure of a medical catheter assembly according to an embodiment of the present invention;

[0023] Figure 2 1 is an exploded schematic diagram of a medical catheter assembly according to an embodiment of the present invention;

[0024] Figure 3 This is one of the cross-sectional views of a medical catheter assembly according to an embodiment of the present invention;

[0025] Figure 4 yes Figure 3 A partial enlarged schematic diagram;

[0026] Figure 5 1 is a schematic diagram of a fixing sleeve in a medical catheter assembly according to an embodiment of the present invention;

[0027] Figure 6 Schematic diagram of a rubber ring disposed on a fixed sleeve in a medical catheter assembly according to an embodiment of the present invention;

[0028] Figure 7 This is a second cross-sectional view of the medical catheter assembly according to an embodiment of the present invention;

[0029] Figure 8 It is a cross-sectional view of a tube seat in a medical catheter assembly according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] 1. Single-lumen tube; 2. Tube seat; 201. Seat body; 202. Assembly tailstock; 203. Side branch; 3. Fixing sleeve; 301. Anti-slip teeth; 302. Flaring; 303. Annular groove; 4. Sealing ring; 5. Hemostatic gasket; 6. Screw cap; 601. Screw cap body; 602. Pusher; 7. Retaining ring; 8. Side pipe; 9. Three-way valve; 10. Screw thread. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0034] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0035] Overview of existing technology:

[0036] It is pointed out in the background art that in the prior art, a strong and effective connection between a PTFE tube and a catheter seat cannot be achieved, and the PTFE tube is prone to falling off when subjected to a large tensile force.

[0037] In addition, the medical catheters in the prior art also have the following defects:

[0038] (1) When the injection pressure is too high, leakage is likely to occur at the connection between the PTFE tube and the catheter seat;

[0039] (2) The tube holder for thrombus rotary cutting / dissection instruments usually uses a snap-on design for the assembly of the silicone hemostatic gasket. This design is not easy to control the deformation of the silicone hemostatic gasket. The snap-on design is non-adjustable. After the snap-on assembly is completed, the deformation of the silicone hemostatic gasket is a fixed value. When the deformation is too large, the force of the silicone gasket holding the spiral thread will increase, causing excessive load on the driving device; when the deformation is too small, the silicone gasket cannot hold the spiral thread tightly, causing leakage;

[0040] (3) The buckle design is fixed in the axial direction, but the position in the circumferential direction is not fixed. This will cause the silicone hemostatic gasket to twist when the buckle rotates, destroying the integrity of the silicone gasket and affecting the final assembly effect.

[0041] In view of this, the present invention provides a medical catheter assembly and a manufacturing method thereof to solve the above-mentioned problems.

[0042] The following combination Figures 1 to 8 The present invention describes a medical catheter assembly and a method for manufacturing the same.

[0043] like Figures 1 to 4 As shown, one aspect of the present invention provides a medical catheter assembly, comprising: a single-lumen tube 1, a tube seat 2 and a fixing sleeve 3, wherein the tube seat 2 is provided with a lumen, the fixing sleeve 3 is disposed in the lumen, the first end of the single-lumen tube 1 is sleeved on the fixing sleeve 3, and the second end of the single-lumen tube 1 is located outside the lumen, and a fixing structure is provided between the lumen and the outer wall of the fixing sleeve 3, the fixing structure being used to limit axial movement of the fixing sleeve 3 and to compress the first end of the single-lumen tube 1.

[0044] Specifically, in this embodiment, the tube seat 2 includes a seat body 201, an assembly tail seat 202 and a side branch 203. The seat body 201 and the assembly tail seat 202 are coaxially arranged, the side branch 203 and the seat body 201 are perpendicular to each other, the tube cavity runs through the seat body 201 and the assembly tail seat 202, and the side branch 203 is provided with a side branch cavity connected to the tube cavity along its inner axis. The side branch cavity and the tube cavity are combined to form a typical three-way structure.

[0045] In this embodiment, the single-lumen tube 1 is made of PTFE, the tube base 2 is made of plastic, including but not limited to polypropylene, polycarbonate, or nylon, etc. The fixing sleeve 3 is made of a metal material with good biocompatibility, including but not limited to 304, 304L, 316, or 306L stainless steel.

[0046] In the medical catheter assembly provided by the present invention, the first end of the single-lumen tube 1 is sleeved on the fixing sleeve 3, and the fixing sleeve 3 is arranged in the lumen of the tube seat 2. Since a fixing structure is provided between the lumen and the outer wall of the fixing sleeve 3, the fixing structure can limit the axial movement of the fixing sleeve 3 and press the first end of the single-lumen tube 1, thereby achieving an effective connection between the single-lumen tube 1 and the tube seat 2 and preventing them from falling off.

[0047] like Figure 5 As shown, in this embodiment of the present invention, the fixing structure includes a plurality of anti-slip teeth 301 spaced along a first direction on the outer wall of the fixing sleeve 3 and a plurality of anti-slip grooves spaced along the first direction in the tube lumen, with the anti-slip teeth 301 matching the anti-slip grooves. The matching anti-slip teeth 301 and anti-slip grooves prevent axial movement of the fixing sleeve 3. Furthermore, after the first end of the single-lumen tube 1 is sleeved onto the outer wall of the fixing sleeve 3, the anti-slip teeth 301 and anti-slip grooves cooperate to compress and secure the first end, effectively connecting the single-lumen tube 1 to the tube base 2 and preventing it from falling off during use.

[0048] Specifically, in this embodiment, multiple anti-slip teeth 301 are arranged inward to form an "inverted tooth" structure, and the set position of the tube cavity forms an anti-slip groove that matches it. The first end of the single-lumen tube 1 is located between the anti-slip teeth 301 and the anti-slip groove, so that the first end of the single-lumen tube 1 can be effectively pressed and fixed.

[0049] like Figure 5 As shown, in this embodiment of the present invention, a plurality of sealing rings 4 are provided on the outer wall of the fixing sleeve 3 at intervals along a first direction. By providing the plurality of sealing rings 4 on the outer wall of the fixing sleeve 3 at intervals along the first direction, firstly, the plurality of sealing rings 4 can exert circumferential and radial expansion forces on different parts of the single-lumen tube 1, allowing the different parts of the single-lumen tube 1 to cling to the lumen wall, thereby further strengthening the connection strength between the single-lumen tube 1 and the tube seat 2; secondly, the sealing rings 4 can seal the gap between the inner wall of the single-lumen tube 1 and the outer wall of the fixing sleeve 3, preventing leakage.

[0050] Specifically, in this embodiment, to facilitate securing the sealing ring 4, the outer wall of the fixing sleeve 3 is provided with a plurality of annular grooves 303 spaced along a first direction for mounting the sealing ring 4. The sealing ring 4 is made of high-temperature resistant rubber, which has good elasticity and can withstand the injection molding temperature. The outer wall of the fixing sleeve 3 is provided with a plurality of mounting grooves for mounting the sealing ring 4.

[0051] like Figure 2 and Figure 7 As shown, in the embodiment of the present invention, the medical catheter assembly further includes a hemostatic gasket 5, which is arranged in the lumen. The hemostatic gasket 5 can achieve a hemostatic sealing effect.

[0052] Specifically, in this embodiment, a through hole is provided at the center of the hemostatic gasket 5 for a thrombus-breaking device (such as a screw thread) to pass through. In a specific implementation, the diameter of the through hole is slightly smaller than the diameter of the thrombus-breaking device, thereby providing a more reliable sealing effect when the thrombus-breaking device is in operation.

[0053] like Figure 2 and Figure 7As shown, in this embodiment of the present invention, the medical catheter assembly further includes a screw cap 6, which is threadedly connected to one end of the tube base 2. The screw cap 6 is provided with a pushing portion 602, which is used to apply a thrust to the hemostatic gasket 5 when the screw cap 6 is tightened onto the tube base 2. By providing the pushing portion 602 on the screw cap 6, when the screw cap 6 is tightened onto the tube base 2, the pushing portion 602 can apply a thrust to the hemostatic gasket 5, causing the hemostatic gasket 5 to deform, thereby achieving a hemostatic seal. Furthermore, the deformation of the hemostatic gasket 5 driven by the threaded tightening facilitates control of the deformation of the hemostatic gasket 5.

[0054] Specifically, in this embodiment, the hemostatic gasket 5 is made of silicone. The screw cap 6 includes a screw cap body 601 and a pusher 602 coaxially disposed therewith. A gap is provided between the inner wall of the screw cap body 601 and the pusher 602 to allow for the tube holder 2 to be positioned. One end of the tube holder 2 is provided with external threads, and the inner wall of the screw cap body 601 is provided with internal threads that match these external threads. When the screw cap 6 is tightened, the gap between the inner wall of the screw cap body 601 and the pusher 602 is sufficient to accommodate the assembly tailstock 202 of the tube holder 2, preventing interference.

[0055] like Figure 7 As shown, in a further embodiment of the present invention, a retaining ring 7 is provided between the pushing portion 602 and the hemostatic gasket 5. By providing the retaining ring 7 between the pushing portion 602 and the hemostatic gasket 5, the axial force applied by the pushing portion 602 can be transmitted to the hemostatic gasket 5 through the retaining ring 7, exerting a squeezing effect on the hemostatic gasket 5, effectively eliminating the torque applied by the pushing portion 602 on the hemostatic gasket 5, and preventing the hemostatic gasket 5 from torsional deformation and other adverse effects.

[0056] like Figure 5 As shown, in this embodiment of the present invention, the first end of the fixing sleeve 3 is provided with a flared opening 302. Since the lumen is used for passage of other instruments (such as the filament 10), the flared opening 302 provided at the first end of the fixing sleeve 3 can guide the passage of other instruments.

[0057] like Figure 1 As shown, in this embodiment of the present invention, the medical catheter assembly further includes a bypass tube 8 and a three-way valve 9. One end of the bypass tube 8 is connected to the lumen, and the other end of the bypass tube 8 is connected to the three-way valve 9. The three-way valve 9 is used to connect a syringe or a negative pressure syringe to the catheter lumen for injecting drugs (generally thrombolytic drugs and contrast agents) or aspirating thrombi.

[0058] Specifically, if Figure 3As shown, in this embodiment, the side branch cavity provided in the side branch 203 is in the shape of a countersunk hole, and the diameter of the hole section with a larger diameter of the countersunk hole is the same as the outer diameter of the side tube 8, which can make the connection between the inner cavity of the side tube 8 and the inner cavity of the side branch 203 where the side tube 8 is bonded to the tube seat 2 smoother, and avoid vortexes at the connection when injecting drugs or aspirating thrombus from the side tube 8.

[0059] like Figure 1 As shown, in an embodiment of the present invention, the medical catheter assembly further includes a thrombus disruption device. A thrombus disruption device generally refers to a rotating component within a mechanical thrombus removal device that requires rotation to achieve the purpose of disrupting and removing thrombi. For example, the filament 10 is inserted into the lumen and passed through the flared opening 302 of the fixed sleeve 3 into the single-lumen tube 1. The filament 10 then reaches the site of the thrombus lesion. Rotating the filament 10 effectively disrupts and removes the thrombus at the site of the thrombus lesion.

[0060] Another aspect of the present invention provides a method for manufacturing the medical catheter assembly as described above, comprising:

[0061] Sleeve the sealing ring 4 onto the outer wall of the fixed sleeve 3;

[0062] The first end of the single-lumen tube 1 is sleeved on the fixing sleeve 3 to form a first component;

[0063] The first component is placed in the tube base 2 mold, and the tube base 2 is injection molded. During the process of forming the tube base 2, the injection liquid squeezes the single-lumen tube 1, so that the single-lumen tube 1 fits against the outer wall of the fixed sleeve 3, and causes the sealing ring 4 to produce a set degree of extrusion deformation, so that it continuously maintains tension on the single-lumen tube 1.

[0064] Specifically, before the first end of the single-lumen tube 1 is sleeved on the fixed sleeve 3, the first end of the single-lumen tube 1 needs to be flared 302. The shape and size of the flared 302 match the fixed sleeve 3. After the sealing ring 4 is sleeved on the outer wall of the fixed sleeve 3, the single-lumen tube 1 after the flaring 302 can be sleeved on the fixed sleeve 3 equipped with the sealing ring 4 to form a first component. After the first component is manufactured, it is placed in the mold of the tube seat 2 for injection molding. During the injection molding process, the soft single-lumen tube 1 will be wrapped by high-temperature and high-pressure plastic liquid, and the single-lumen tube 1 will be squeezed to make it close to the fixed sleeve 3 and the sealing ring 4, and the sealing ring 4 will also produce a certain degree of extrusion deformation under the action of high pressure. After the plastic fluid cools, the above-mentioned fixed structure is formed between the specific part of the tube cavity of the tube seat 2 and the outer wall of the fixed sleeve 3, which can prevent the fixed sleeve 3 from moving axially. At the same time, the area where the single-lumen tube 1 clings to the anti-slip teeth 301 and the anti-slip groove is anchored and compressed by two rigid components, the fixing sleeve 3 and the tube base 2. The anti-slip teeth 301 act like hooks to prevent the single-lumen tube 1 from slipping when subjected to axial force. Simultaneously, the squeezed and deformed sealing ring 4 constantly exerts a circumferential and radial expansion force on the single-lumen tube 1. This expansion force further strengthens the bond between the single-lumen tube 1 and the tube base 2. Furthermore, the squeezed and deformed sealing ring 4 eliminates the possibility of high-pressure injected medication escaping from the gap between the tube base 2 and the single-lumen tube 1 during surgery, ultimately resolving the problem of reliably connecting the single-lumen tube 1 to other plastic materials.

[0065] Afterwards, one end of the bypass tube 8 is bonded and connected to the side branch 203 of the tube base 2 , and the other end of the bypass tube 8 is bonded and connected to the three-way valve.

[0066] When in use, the screw thread 10 can be inserted from one end of the single-lumen tube 1, and the hemostatic gasket 5, the retaining ring 7 and the screw cap 6 can be sequentially placed on the screw thread 10. The hemostatic gasket 5, the retaining ring 7 and the screw cap 6 can be slid into the tail seat 202 of the tube seat assembly and the screw cap 6 can be tightened to the appropriate position to achieve the final assembly.

[0067] From the description of the above embodiments, it can be seen that the medical catheter assembly and the manufacturing method thereof provided by the present invention have at least the following advantages:

[0068] (1) The medical catheter assembly and the manufacturing method thereof provided by the present invention are as follows: the first end of the single-lumen tube 1 is sleeved on the fixing sleeve 3, and the fixing sleeve 3 is arranged in the lumen of the tube seat 2. Since a fixing structure is provided between the lumen and the outer wall of the fixing sleeve 3, the fixing structure can limit the axial movement of the fixing sleeve 3 and press the first end of the single-lumen tube 1, thereby realizing an effective connection between the single-lumen tube 1 and the tube seat 2 and preventing them from falling off;

[0069] (2) The medical catheter assembly provided by the present invention is characterized in that a plurality of sealing rings 4 are arranged at intervals along a first direction on the outer wall of the fixed sleeve 3. Firstly, the plurality of sealing rings 4 can exert a circumferential radial expansion force on different parts of the single-lumen tube 1, so that different parts of the single-lumen tube 1 can be closely attached to the lumen wall of the tube, thereby further strengthening the connection strength between the single-lumen tube 1 and the tube seat 2; secondly, the sealing ring 4 can seal the gap between the inner wall of the single-lumen tube 1 and the outer wall of the fixed sleeve 3 to prevent leakage;

[0070] (3) The medical catheter assembly provided by the present invention is provided with a hemostatic gasket 5, a screw cap 6 and a retaining ring 7. First, when the screw cap 6 is screwed onto the tube seat 2, the pushing portion 602 can exert a thrust on the hemostatic gasket 5, causing the hemostatic gasket 5 to deform, thereby achieving a hemostatic sealing effect. Moreover, the hemostatic gasket 5 is driven to deform by screwing, which is beneficial to controlling the deformation amount of the hemostatic gasket 5. Secondly, by providing the retaining ring 7 between the pushing portion 602 and the hemostatic gasket 5, the axial force exerted by the pushing portion 602 can be transmitted to the hemostatic gasket 5 through the retaining ring 7, exerting a squeezing effect on the hemostatic gasket 5, and effectively eliminating the torque exerted by the pushing portion 602 on the hemostatic gasket 5, thereby preventing the hemostatic gasket 5 from torsional deformation and causing adverse effects.

[0071] (4) The manufacturing method of the medical catheter assembly provided by the present invention can achieve an effective connection between the single-lumen tube 1 and the tube seat 2, preventing them from falling off.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A medical catheter assembly, characterized in that: include: A single-lumen tube, a tube seat, and a fixing sleeve, wherein the single-lumen tube is made of PTFE, the tube seat is provided with a lumen, the fixing sleeve is disposed within the lumen, the first end of the single-lumen tube is sleeved on the fixing sleeve, a fixing structure is provided between the lumen and the outer wall of the fixing sleeve, the fixing structure is used to limit the axial movement of the fixing sleeve and to compress the first end of the single-lumen tube; The fixing structure includes a plurality of anti-slip teeth arranged on the outer wall of the fixing sleeve at intervals along the first direction and a plurality of anti-slip grooves arranged on the tube cavity at intervals along the first direction, the anti-slip teeth match the anti-slip grooves, and a plurality of sealing rings are arranged on the outer wall of the fixing sleeve at intervals along the first direction; the single-lumen tube is tightly attached to the outer walls of the fixing sleeve and the sealing rings.

2. The medical catheter assembly according to claim 1, wherein: It also includes a hemostatic gasket, which is arranged in the tube cavity.

3. The medical catheter assembly according to claim 2, characterized in that It also includes a screw cap, which is threadedly connected to one end of the tube seat. The screw cap is provided with a pushing part, which is used to apply thrust to the hemostatic gasket when the screw cap is screwed onto the tube seat.

4. The medical catheter assembly according to claim 3, characterized in that A retaining ring is provided between the pushing portion and the hemostatic gasket.

5. The medical catheter assembly according to claim 1, wherein: The first end of the fixing sleeve is provided with a flared opening.

6. The medical catheter assembly according to any one of claims 1 to 5, characterized in that: It also includes a bypass tube and a three-way valve, one end of the bypass tube is communicated with the lumen, and the other end of the bypass tube is communicated with the three-way valve.

7. The medical catheter assembly according to any one of claims 1 to 5, characterized in that: It also includes a thrombus breaking device, which can pass through the tube cavity and the single-lumen tube and reach the thrombus lesion site to break and remove the thrombus.

8. A method for manufacturing a medical catheter assembly according to any one of claims 1 to 7, characterized in that: include: Sleeve the sealing ring on the outer wall of the fixing sleeve; The first end of the single-lumen tube is sleeved on the fixing sleeve to form a first component; The first component is placed in a tube seat mold and injection molding is performed in the tube seat mold. During the process of forming the tube seat, the injection molding liquid squeezes the single-lumen tube so that the single-lumen tube fits against the outer wall of the fixing sleeve, and causes the sealing ring to produce a set degree of extrusion deformation, so that it continuously maintains tension on the single-lumen tube.

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