CN219804111U - Thrombolysis catheter - Google Patents

Abstract

The utility model is applicable to the technical field of medical equipment, and provides a thrombolysis catheter, which comprises: a catheter holder; the catheter comprises a catheter body, wherein one end of the catheter body is connected with the catheter seat, the catheter body comprises a catheter body, and a first channel extending along the axial direction is arranged in the catheter body; the pipe body is provided with a plurality of first through holes, and comprises an inner layer, a reinforcing layer and an outer layer which are radially and sequentially arranged outwards from the first channel; the side wall of the pipe body is set to be of a three-layer structure, wherein the inner layer is used for passing through equipment and liquid medicine, the equipment and the liquid medicine can pass through smoothly, the reinforcing layer is used for guaranteeing supportability and pushability, the outer layer is used for protecting the thrombolysis catheter, good trafficability characteristic and supportability can be guaranteed for the thrombolysis catheter, and the practicability is strong.

Description

Thrombolysis catheter

Technical Field

The utility model belongs to the technical field of medical equipment, and particularly relates to a thrombolysis catheter.

Background

Thrombolytic catheters inject thrombolytic drugs through the catheter to the lesion site to improve blood flow at the stenosed site of the vessel. In some fine distal vascular lesions, the common thrombolytic catheter has larger diameter and poor trafficability, and cannot reach the complicated tortuous distal lesion sites, and thus, the accurate drug injection cannot be realized. For such lesions clinically, systemic thrombolysis is usually carried out by adopting an intravenous infusion mode or a thrombolytic drug is infused at the proximal end of a common thrombolytic catheter to realize a distal vascular thrombolysis effect so as to improve blood flow; however, as the medicine is far away from the thrombus position, the medicine is diluted by blood, the utilization rate is low, more medicine is needed to be used to enable part of medicine to reach the thrombus position, a good thrombolysis effect is difficult to achieve, and other clinical risks can be caused by the increased medicine dosage. If the diameter of the thrombolytic catheter in the prior art is directly reduced, the problems of insufficient hardness, poor support property, excessive hardness, poor trafficability and the like of the catheter are easy to occur.

Disclosure of Invention

Aiming at the problems, the utility model provides a thrombolysis catheter, which at least solves the problems that the prior art lacks a thrombolysis catheter with small pipe diameter, and the direct reduction of the pipe diameter of the thrombolysis catheter is easy to cause poor support and poor trafficability.

The thrombolysis catheter provided by the embodiment of the utility model comprises:

a catheter holder;

the catheter comprises a catheter body, wherein one end of the catheter body is connected with the catheter seat, the catheter body comprises a catheter body, and a first channel extending along the axial direction of the catheter body is arranged in the catheter body; the pipe body is provided with a plurality of first through holes communicated with the first channel, and the pipe body comprises an inner layer, a reinforcing layer and an outer layer which are sequentially arranged from the first channel outwards along the radial direction of the pipe body.

In an embodiment, the reinforcement layer includes a metal layer, and the metal layer is a space grid structure;

the inner layer is made of a high polymer material;

the material of the outer layer comprises any one of polyamide, polyurethane and polyolefin.

In an embodiment, the catheter body further comprises a de-stressing pipe, one end of the de-stressing pipe is connected with the catheter seat, and the other end of the de-stressing pipe is connected with the catheter body;

and a second channel communicated with the first channel is arranged in the stress removing pipe.

In an embodiment, the material of the stress relief pipe is an elastic material.

In one embodiment, the hardness of the tube body gradually becomes soft from one end close to the catheter seat to one end far away from the catheter seat; the outer diameter of the pipe body gradually becomes smaller from the end close to the catheter seat to the end far away from the catheter seat.

In an embodiment, the catheter body further includes an end portion, the end portion is connected to an end of the tube body away from the catheter seat, a second through hole communicated with the first channel is formed in the end portion, and the second through hole is used for allowing a guide wire to pass through.

In an embodiment, the thrombolytic catheter further comprises a guide wire portion connected to the tube body, wherein a third channel is arranged in the guide wire portion, the extending direction of the third channel is the same as the extending direction of the first channel, and the third channel is used for allowing the guide wire to pass through.

In one embodiment, the catheter body further comprises an end portion connected to an end of the shaft distal from the catheter hub and sealing an end of the first channel distal from the catheter hub;

the guide wire part is connected to the outer wall of the pipe body, and the guide wire part is arranged beside the end part.

In one embodiment, the guide wire part is of a single-layer structure and is made of high polymer materials; or (b)

The guide wire part is of a multi-layer structure and comprises a high polymer material layer and a metal material layer.

In one embodiment, the guidewire portion is a unitary exchange structure or a rapid exchange structure.

Aiming at the problems that in the prior art, the small-diameter thrombolysis catheter is lack, the support property and the trafficability are poor due to the fact that the diameter of the thrombolysis catheter is directly reduced, the side wall of the catheter body is of a three-layer structure so as to ensure the support property and the trafficability of the thrombolysis catheter, wherein the inner layer is used for passing equipment and liquid medicine, ensuring that the equipment and the liquid medicine can pass smoothly, the reinforcing layer is used for ensuring the support property and the pushing property, and the outer layer is used for protecting the thrombolysis catheter;

the thrombolysis catheter provided by the embodiment of the utility model has a simple structure, the side wall of the catheter body is of a three-layer structure, the thrombolysis catheter can be ensured to have good trafficability and supportability, and the practicability is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic front view of a thrombolytic catheter according to a first embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view of the shaft of the thrombolytic catheter shown in fig. 1.

Fig. 3 is a schematic front view of a thrombolytic catheter according to a second embodiment of the present utility model.

Fig. 4 is a schematic front view of a thrombolytic catheter according to a third embodiment of the present utility model.

The meaning of the labels in the figures is:

100. thrombolysis catheter;

10. a catheter holder;

20. a catheter body; 21. a pipe body; 211. a first channel; 212. a first through hole; 221. an inner layer; 222. a reinforcing layer; 223. an outer layer; 23. removing a stress tube; 231. a second channel; 24. an end portion; 241. a second through hole;

30. a guide wire portion; 31. and a third channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail below with reference to the accompanying drawings, i.e., embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In some fine distal vascular lesions, the common thrombolytic catheter has larger diameter and poor trafficability, and can not reach the complicated tortuous distal lesion sites, thereby realizing accurate drug injection. Aiming at such lesions clinically, systemic thrombolysis is usually carried out by adopting an intravenous infusion mode or a thrombolytic drug is infused at the proximal end of a common thrombolytic catheter to realize a distal vascular thrombolysis effect and improve blood flow, but as the distance from a thrombus position is far, the drug is diluted by blood, the utilization rate is low, more drugs are needed to be used to enable part of the drug to reach the thrombus position, a good thrombolysis effect is difficult to achieve, and the dosage of the drug is increased to cause other clinical risks. If the diameter of the thrombolytic catheter in the prior art is directly reduced, the problems of insufficient hardness, poor support property, excessive hardness, poor trafficability and the like of the catheter are easy to occur.

Therefore, the embodiment of the utility model provides the thrombolytic catheter, the side wall of the catheter body is of a three-layer structure, wherein the inner layer is used for passing equipment and liquid medicine, ensuring that the equipment and the liquid medicine can pass smoothly, the reinforcing layer is used for ensuring supportability and pushing property, the outer layer is used for protecting the thrombolytic catheter, and the thrombolytic catheter can be ensured to have good passing property and supportability.

It should be noted that the proximal end of the thrombolytic catheter is the end closer to the user and the distal end of the thrombolytic catheter is the end farther from the user.

In order to describe the technical scheme of the utility model, the following description is made with reference to specific drawings and embodiments.

Referring to fig. 1 and 2, a first embodiment of the present utility model provides a thrombolytic catheter 100 comprising a catheter hub 10 and a catheter body 20.

Catheter hub 10 is used to provide a fixed basis for catheter body 20, with catheter hub 10 being located outside the patient's body when thrombolytic catheter 100 is introduced into the patient's body; catheter hub 10 can be coupled to an external access device, such as a drug delivery device, to allow a drug solution provided by the drug delivery device to flow into catheter body 20 through catheter hub 10, while catheter hub 10 also facilitates the user's handling and manipulation of thrombolytic catheter 100.

The catheter seat 10 may have a tubular or cylindrical structure with a channel formed therein, and the catheter seat 10 may have a columnar or other various-shaped member with a channel formed therein; the catheter hub 10 may be made of polycarbonate, polyurethane, nylon, or various other materials.

One end of the catheter body 20 is connected to the catheter hub 10, and when the thrombolytic catheter 100 is introduced into the patient, the catheter body 20 is introduced into the patient; the catheter body 20 comprises a catheter body 21, a first channel 211 extending along the axial direction of the catheter body 21 is arranged in the catheter body 21, and the first channel 211 can be communicated with a channel in the catheter seat 10 so that the liquid medicine can flow into the first channel 211 through the catheter seat 10; the tube body 21 is provided with a plurality of first through holes 212, and one end of the first through holes 212 is communicated with the first channel 211, so that the liquid medicine in the first channel 211 can flow into a blood vessel or a target position of a patient through the first through holes 212.

The pipe body 21 comprises an inner layer 221, a reinforcing layer 222 and an outer layer 223, wherein the inner layer 221, the reinforcing layer 222 and the outer layer 223 are sequentially arranged outwards from the first channel 211 along the radial direction of the pipe body 21, and the inner layer 221 is used for passing equipment and liquid medicine so as to ensure that the equipment and the liquid medicine can pass smoothly; the reinforcing layer 222 is used for providing good support for the tube body 21 so as to ensure that the tube body 21 cannot be obviously deformed in the intravascular pushing process to influence smooth flowing of the liquid medicine in the first channel 211, and the reinforcing layer 222 is also used for providing good pushing performance for the tube body 21 so that the first channel 211 can be smoothly pushed in the blood vessel of a patient; the outer layer 223 serves to protect the thrombolytic catheter 100.

The catheter body 20 and the catheter hub 10 may be connected by adhesive, sealing engagement, or other various connection methods.

It will be appreciated that the first through-hole 212 penetrates the inner layer 221, the reinforcing layer 222 and the outer layer 223 to enable the first passage 211 to communicate with the outside so that the medical fluid can flow from the first passage 211 into the blood vessel of the patient through the first through-hole 212.

The beneficial effects of this embodiment lie in: the side wall of the tube body 21 is set to be of a three-layer structure, wherein the inner layer 221 is used for passing equipment and liquid medicine, ensuring that the equipment and the liquid medicine can pass smoothly, the reinforcing layer 222 is used for ensuring supportability and pushing property, and the outer layer 223 is used for protecting the thrombolytic catheter 100, so that the thrombolytic catheter 100 can still have good passing property and supportability after the tube diameter is reduced.

In one embodiment, catheter hub 10 is made of a rigid polycarbonate or rigid polyurethane.

In this embodiment, catheter hub 10 is attached to catheter body 20 by UV or thermoset glue.

Referring to fig. 2, in one embodiment, the reinforcement layer 222 of the pipe body 21 includes a metal layer, which is a space grid structure, and specifically, the metal layer forms a three-dimensional space grid structure through metal wires to provide support to the pipe body 21, where the metal wires may be stainless steel wires, nickel-titanium memory alloy wires, or other various metal wires; at the same time, the metal layer also has a certain deformation space and can be bent along with the bending of the pipe body 21.

The reinforcing layer 222 may also comprise a non-metallic layer and may be formed of a non-metallic material such as rubber, elastoplastic or other various non-metallic materials having support properties and elastic deformation capabilities.

The reinforcing layer 222 may also be a layer of various other structures or materials that are capable of bending, are resilient, and are supportive.

In this embodiment, the inner layer 221 is a polymer layer, and the material of the inner layer 221 is a polymer material, specifically, the material of the inner layer 221 may be high density polyethylene, polytetrafluoroethylene, polyimide, or other various polymer materials; since the guide wire, instrument or medical fluid is in direct contact with the inner layer 221 as it passes through the first channel 211, the material of the inner layer 221 should be selected to have a low friction coefficient.

In this embodiment, the material of the outer layer 223 may be any one of polyamide, polyurethane and polyolefin, and the outer layer 223 may be a polymer including at least two of polyamide, polyurethane and polyolefin with different hardness.

In this embodiment, the hardness of the tube body 21 gradually becomes soft from the end close to the catheter seat 10 to the end far away from the catheter seat 10, that is, the hardness of the tube body 21 gradually becomes soft from the proximal end to the distal end, and this arrangement can make the proximal end of the tube body 21 have good supporting property and the distal end have good passing property, and under the protective supporting effect of the inner layer 221, the reinforcing layer 222 and the outer layer 223, the distal end of the tube body 21 can have good passing property and also have good supporting property.

In this embodiment, the outer diameter of the tube body 21 gradually decreases from the end close to the catheter seat 10 to the end far from the catheter seat 10, that is, the outer diameter of the tube body 21 decreases from the proximal end to the distal end, which can further enable the proximal end of the tube body 21 to have good supporting force and the distal end of the tube body 21 to have good flexibility and trafficability; optionally, the outer diameter of the distal end of the tube body 21 is smaller than 1mm, so that the tube body 21 has good capacity of passing through the microcatheter and can smoothly reach the lesion position.

It should be noted that the proximal end of the tube 21 is the end close to the operator, and the distal end of the tube 21 is the end far from the operator.

In an embodiment, the first through hole 212 may be a square hole, a circular hole, a diamond hole, an oval hole, or other various shapes; alternatively, referring to fig. 1 and 2, the first through hole 212 is a square hole.

In one embodiment, the catheter body 20 further comprises a stress relief tube 23, one end of the stress relief tube 23 is connected with the catheter seat 10 and the other end is connected with the catheter shaft 21, and the stress relief tube 23 is used for preventing the catheter seat 10 and the catheter shaft 21 from being broken or folded due to stress concentration when the thrombolytic catheter 100 is used; the stress removing pipe 23 can be fixedly connected with the catheter seat 10 and the catheter body 21 through glue bonding or other various modes, and can also be in sealing clamping connection or other various connecting modes.

The destressing tube 23 is internally provided with a second channel 231, the second channel 231 is communicated with the first channel 211, and the second channel 231 is also communicated with the channel in the catheter seat 10, so that the liquid medicine can enter the first channel 211 through the catheter seat 10 and the second channel 231 sequentially by an external access instrument.

In this embodiment, the material of the stress relief tube 23 is an elastic material, and specifically, the material of the stress relief tube 23 may be a polyurethane elastomer, a polyolefin, a polyethylene elastomer or other various elastic materials.

In this embodiment, the stress relief pipe 23 is tapered, and the outer diameter of the end of the stress relief pipe 23 connected to the pipe seat 10 and the pipe body 21 is small and the outer diameter of the middle part is large.

In an embodiment, the catheter body 20 further includes an end 24, the end 24 is connected to an end of the tube body 21 away from the catheter holder 10, a second through hole 241 is formed on the end 24, the second through hole 241 is used for allowing a guide wire to pass through, the second through hole 241 is connected to the first channel 211, and the guide wire can sequentially pass through the catheter holder 10, the second channel 231, the first channel 211 and the second through hole 241 and extend from the end 24 to the outside, so as to achieve the effect of guiding the thrombolytic catheter 100.

In this embodiment, the material of the end 24 may be soft polyurethane, polyamide or other various materials, and the soft end 24 can reduce the damage to the inner wall of the blood vessel caused by the thrombolytic catheter 100 when passing through the blood vessel.

In this embodiment, the shape of the end 24 is circular or streamlined, which can ensure better passability and good guidewire tracking of the end 24 so that the catheter body 20 can pass smoothly through curved, complex distal vessels and better reach the target site.

In this embodiment, the end 24 is internally provided with a developing material, so that the end 24 is developed under the X-ray, ensuring that the user can precisely position the end 24, and facilitating the operation.

Referring to fig. 1, the operation procedure of the first embodiment of the present utility model is: the guide wire is sequentially passed through the guide tube seat 10, the second channel 231, the first channel 211 and the second through hole 241 and extends from the end 24 to the outside; then, one end of the guide wire far away from the user enters the blood vessel of the patient, and then the guide tube seat 10 is pushed and the guide tube body 20 enters the blood vessel of the patient along the guide wire until the guide tube body 20 is pushed to the target position; thereafter, the medical fluid is injected into the first passage 211 through the catheter hub 10, and flows to the target site through the first through hole 212.

The first embodiment of the present utility model is advantageous in that:

1. the side wall of the tube body 21 is provided with a three-layer structure, wherein the inner layer 221 is used for passing equipment and liquid medicine, ensuring that the equipment and the liquid medicine can pass smoothly, the reinforcing layer 222 is used for ensuring supportability and pushing property, and the outer layer 223 is used for protecting the thrombolytic catheter 100, so that the thrombolytic catheter 100 can have good passing property and supportability at the same time;

2. the first through hole 212 is formed in the side wall of the tube body 21, so that the liquid medicine can flow into the blood vessel from the side wall of the tube body 21 to infuse thrombolytic drugs around thrombus, and the problem of remote vascular thrombolysis is effectively solved;

3. the hardness of the pipe body 21 is set to be gradually softened from the proximal end to the distal end, and the outer diameter of the pipe body 21 is set to be gradually reduced from the proximal end to the distal end, so that the proximal end of the pipe body 21 has good supporting force, and the distal end of the pipe body 21 has good flexibility and trafficability;

4. the end 24 is provided and the end 24 is provided with a soft and streamlined configuration to further enhance the passability of the catheter body 20 while reducing damage to the vessel interior wall caused by the thrombolytic catheter 100 as it passes through the vessel.

Referring to fig. 3, a thrombolytic catheter 100 of a thrombolytic tube according to a second embodiment of the present utility model includes a catheter hub 10 and a catheter body 20, and the catheter body 20 includes a tube 21 and a stress relief tube 23.

The thrombolytic catheter 100 according to the second embodiment of the present utility model further comprises a guide wire portion 30, wherein the guide wire portion 30 is connected to the tube body 21, and is specifically connected to the distal end of the tube body 21, and a third channel 31 is disposed in the guide wire portion 30, and the third channel 31 is a guide wire lumen, and the third channel 31 is used for allowing a guide wire to pass through, i.e. the guide wire in this embodiment no longer passes through the first channel 211.

The third channel 31 is adjacent to the first channel 211 to reduce the diameter of the distal end of the thrombolytic catheter 100 and simplify the structure; the third channel 31 extends in the same direction as the first channel 211 so that the catheter body 20 can be pushed along the guidewire to the target location.

Referring to fig. 3, in an embodiment, the guide wire portion 30 has a single layer structure, and the material of the single layer structure is a polymer material, and specifically, the material of the single layer structure may be high density polyethylene, polytetrafluoroethylene, polyimide, or other various polymer materials; since the guide wire third channel 31 is in direct contact with the single layer structure, the material of the single layer structure should be selected from materials with low friction coefficient; in another embodiment, the guide wire portion 30 is a multi-layer structure, and the multi-layer structure includes a polymer material layer and a metal material layer, wherein the polymer material layer is located close to the third channel 31, and the metal material layer is located far from the third channel 31, and the metal material layer is used for providing support for the guide wire portion 30.

Referring to fig. 3, in one embodiment, the guide wire portion 30 is a quick-change structure that has the advantage of being convenient and quick, improving tracking ability, reducing irradiation time, shortening surgical time, and shortening the length of the wire used.

In one embodiment, the catheter body 20 further includes an end 24, the end 24 being connected to the end of the shaft 21 remote from the catheter hub 10, and the end 24 sealing the end of the first channel 211 remote from the catheter hub 10, i.e. the medical fluid can only enter the patient's blood vessel via the first through hole 212.

In this embodiment, the guide wire portion 30 is connected to the outer wall of the tube body 21 as a part of the catheter body 20, and the guide wire portion 30 is disposed beside the end 24, that is, the guide wire portion 30 is located at one end of the tube body 21 far away from the catheter seat 10, and the guide wire portion 30 is used for providing a foundation for the third channel 31 so that the guide wire can pass through the third channel 31; the end 24 then functions to seal the first passage 211 so that the medical fluid enters the patient's blood vessel via the first through hole 212.

In this embodiment, the material of the end 24 may be soft polyurethane, polyamide or other various materials, and the soft end 24 can reduce the damage to the inner wall of the blood vessel caused by the thrombolytic catheter 100 when passing through the blood vessel.

In this embodiment, the shape of the end 24 is circular or streamlined, which can ensure better passability and good guidewire tracking of the end 24 so that the catheter body 20 can pass smoothly through curved, complex distal vessels and better reach the target site.

In this embodiment, the end 24 is internally provided with a developing material, so that the end 24 is developed under the X-ray, ensuring that the operator can accurately position the head end, and facilitating the operation.

Referring to fig. 3, the action process of the second embodiment of the present utility model is: extending the guide wire through the guide wire part 30 to the outside, then allowing one end of the guide wire far away from the user to enter the blood vessel of the patient, pushing the catheter seat 10 and allowing the catheter body 20 to enter the blood vessel of the patient along the guide wire until the catheter body 20 is pushed to the target position; thereafter, the medical fluid is injected into the first passage 211 through the catheter hub 10, and flows to the target site through the first through hole 212.

The second embodiment of the present utility model is advantageous in that: a guide wire part 30 is provided so that the guide wire and the medical fluid can use different passages, respectively, to facilitate the guide wire operation; the guide wire portion 30 is provided in a quick-change configuration to improve tracking, reduce irradiation time, shorten surgical time, and shorten the length of the wire used.

Referring to fig. 4, a third embodiment of the present utility model provides a thrombolytic catheter 100 of a thrombolytic tube including a catheter hub 10, a catheter body 20 and a guidewire portion 30, the catheter body 20 including a shaft 21, a destressing tube 23 and an end 24.

Unlike the second embodiment, the guide wire portion 30 is an integral exchange structure in this embodiment, and at this time, one end of the guide wire portion 30 is connected to the catheter seat 10 and the third channel 31 passes through the catheter seat 10, so that the integral exchange structure has the advantages of easy exchange of steel wires and good pushing force.

The wire guide 30 may be provided as a part of the catheter body 20 at one side of the tube body 21 with the third passage 31 adjacent to the first passage 211 to reduce the diameter of the thrombolytic catheter 100 and simplify the structure; while the guidewire portion 30 may also be part of the catheter hub 10 to enable the guidewire to pass through the third passageway 31 to enable the guidewire to use different passageways with the medical fluid, respectively.

Referring to fig. 4, the action process of the third embodiment of the present utility model is: firstly, the guide wire passes through the third channel 31 through the guide wire seat 10 and extends to the outside, then one end of the guide wire far away from a user enters the blood vessel of a patient, and then the guide wire seat 10 is pushed and the guide wire body 20 enters the blood vessel of the patient along the guide wire until the guide wire body 20 is pushed to a target position; thereafter, the medical fluid is injected into the first passage 211 through the catheter hub 10, and flows to the target site through the first through hole 212.

The third embodiment of the present utility model is advantageous in that: a guide wire part 30 is provided so that the guide wire and the medical fluid can use different passages, respectively, to facilitate the guide wire operation; the guide wire part 30 is provided in an integral exchange structure so as to exchange steel wires and facilitate the pushing of the guide wires.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.

Claims (10)

1. A thrombolytic catheter, comprising:

a catheter holder;

the catheter comprises a catheter body, wherein one end of the catheter body is connected with the catheter seat, the catheter body comprises a catheter body, and a first channel extending along the axial direction of the catheter body is arranged in the catheter body; the pipe body is provided with a plurality of first through holes communicated with the first channel, and the pipe body comprises an inner layer, a reinforcing layer and an outer layer which are sequentially arranged from the first channel outwards along the radial direction of the pipe body.

2. The thrombolytic catheter of claim 1, wherein said reinforcing layer comprises a metal layer, said metal layer being a spatial grid structure;

the inner layer is made of a high polymer material;

the material of the outer layer comprises any one of polyamide, polyurethane and polyolefin.

3. The thrombolytic catheter of claim 1, wherein said catheter body further comprises a de-stressing tube, one end of said de-stressing tube being connected to said catheter hub and the other end of said de-stressing tube being connected to said tube body;

and a second channel communicated with the first channel is arranged in the stress removing pipe.

4. A thrombolytic catheter according to claim 3 wherein said destressing tube is made of an elastic material.

5. The thrombolytic catheter of claim 1, wherein the hardness of said tube body gradually softens from an end proximal to said catheter hub to an end distal from said catheter hub; the outer diameter of the pipe body gradually becomes smaller from the end close to the catheter seat to the end far away from the catheter seat.

6. The thrombolytic catheter according to claim 1, wherein said catheter body further comprises an end portion connected to an end of said shaft remote from said catheter hub, said end portion having a second through hole communicating with said first channel, said second through hole for a guidewire to pass through.

7. The thrombolytic catheter according to claim 1, further comprising a guide wire portion connected to said tube body, wherein a third channel is provided in said guide wire portion, said third channel extending in the same direction as said first channel, said third channel being for passing a guide wire therethrough.

8. The thrombolytic catheter of claim 7, wherein said catheter body further comprises an end portion connected to an end of said shaft distal from said catheter hub and sealing an end of said first channel distal from said catheter hub;

the guide wire part is connected to the outer wall of the pipe body, and the guide wire part is arranged beside the end part.

9. The thrombolytic catheter according to claim 7 wherein said guide wire portion has a single layer structure and is made of a polymer material; or (b)

The guide wire part is of a multi-layer structure and comprises a high polymer material layer and a metal material layer.

10. The thrombolytic catheter according to any of claims 7-9 wherein said guidewire portion is a monolithic or rapid exchange structure.