CN114699624A - Interventional medical catheter and method of making the same - Google Patents

Abstract

The invention relates to an interventional medical catheter and a manufacturing method thereof. The interventional medical catheter comprises a catheter body, a conductive coil coating and a conductive lead coating, wherein the catheter body is provided with a connecting end and an interventional end which are arranged oppositely, the conductive coil coating and the conductive lead coating are respectively formed on the outer wall of the catheter body, the conductive coil coating is close to the interventional end, and the conductive lead coating is connected to the conductive coil coating and extends towards the connecting end. Above-mentioned intervention formula medical catheter forms conductive coil coating and electrically conductive lead wire coating respectively on the outer wall of pipe body, the conductive coil coating is close to and is set up in the intervention end, play the effect of electrode or inductor etc, electrically conductive lead wire coating is connected in the conductive coil coating and extends to the link, with switch-on therapeutic instrument and conductive coil coating, play the effect of wire, conductive coil coating and electrically conductive lead wire coating directly attach to the outer wall of pipe body, be favorable to reducing the diameter of intervention formula medical catheter, reduce the possibility of damaging the human body.

Description

Interventional medical catheter and method of making the same

technical field

The invention relates to the technical field of medical devices, in particular to an interventional medical catheter and a manufacturing method thereof.

Background technique

Interventional medical catheters are widely used in the medical treatment of the human body. For example, an interventional medical catheter is used as a diagnosis, treatment and ablation tool for renal, cardiovascular and cerebrovascular diseases. It enters a certain part of the human body through the blood vessel, urethra, anorectum or esophagus to treat or ablate the part. Such interventional medical catheters are usually provided with electrodes or sensors, such as heating electrodes, temperature sensors, etc., near the interventional end, which are connected to corresponding therapeutic instruments through wires. After the catheter is wrapped around the wire, it needs to be put into an injection mold, and the outer surface of the catheter is covered with an injection-molded resin material, and the wire is covered with rubber. However, these wires, electrodes, and sensors are wrapped in the catheter, so that the overall diameter of the medical catheter is relatively large, which may easily damage human tissue if improperly manipulated when intervening in the human body.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide an interventional medical catheter and a manufacturing method thereof, so as to solve the problem of the large diameter of the traditional interventional medical catheter.

One of the objects of the present invention is to provide a kind of interventional medical catheter, the scheme is as follows:

An interventional medical catheter, comprising a catheter body, a conductive coil coating and a conductive lead coating; the catheter body has a connection end and an intervention end arranged oppositely, and the conductive coil coating and the conductive lead coating are formed respectively On the outer wall of the catheter body, the conductive coil coating is close to the intervening end, and the conductive lead coating is connected to the conductive coil coating and extends to the connecting end.

In one embodiment, the conductive coil coating includes a heating coil, the conductive lead coating includes a first positive lead and a first negative lead, the first positive lead and the first negative lead are respectively connected to Both ends of the heating coil extend toward the connecting end respectively.

In one embodiment, the heating coil includes a plurality of first arrangement line segments and a plurality of first connection line segments, and the plurality of first arrangement line segments extend along the axial direction of the catheter body and are arranged side by side, adjacent to each other. The first arrangement line segments are connected by the first connection line segments, and the current directions of the adjacent first arrangement line segments are opposite.

In one embodiment, the conductive coil coating includes a temperature sensing coil, the conductive lead coating includes a second positive lead and a second negative lead, and the second positive lead and the second negative lead are respectively connected at both ends of the temperature induction coil and extend toward the connection end respectively.

In one embodiment, the temperature induction coil includes a plurality of second arrangement line segments and a plurality of second connection line segments, the plurality of second arrangement line segments are arc-shaped and nested in layers, and the connected first line segments The two arrangement line segments are connected by the second connection line segment, and the current directions of the adjacent second arrangement line segments are opposite.

In one embodiment, the conductive substance in the conductive coil coating is selected from at least one of nano metal particles, conductive polymers, graphene, and carbon nanotubes.

In one embodiment, the conductive substance in the conductive lead coating is selected from at least one of nano metal particles, conductive polymers, graphene, and carbon nanotubes.

In one embodiment, the thickness of the conductive coil coating is 0.2 μm˜2 μm.

In one embodiment, the thickness of the conductive lead coating is 2 μm˜10 μm.

In one embodiment, the interventional medical catheter further includes a protective coating covering the conductive lead coating and the conductive coil coating.

In one embodiment, the protective coating contains a coating matrix and an antimicrobial agent dispersed in the coating matrix.

One of the objects of the present invention is to provide a method for making an interventional medical catheter, and the scheme is as follows:

A manufacturing method of an interventional medical catheter, comprising the following steps:

obtaining a catheter body, the catheter body having a connection end and an intervention end arranged oppositely;

A conductive coil coating and a conductive lead coating are formed on the outer wall of the catheter body, the conductive coil coating being adjacent to the intervening end, the conductive lead coating being connected to the conductive coil coating and extending to the Connection ends extend.

In one embodiment, the method of forming the conductive coil coating and the conductive lead coating comprises the steps of:

depositing a first conductive layer on the outer wall of the catheter body, the first conductive layer being adjacent to the intervening end;

depositing a second conductive layer on the outer wall of the conduit body, the second conductive layer is connected to the first conductive layer and extends to the connection end;

The first conductive layer and the second conductive layer are etched, so that the first conductive layer is partially etched to form the conductive coil coating, and the second conductive layer is partially etched Thus, the conductive lead coating is formed.

In one embodiment, the etching process is laser etching.

In one embodiment, the method of depositing the first conductive layer includes the steps of:

The insertion end of the catheter body is immersed in the conductive ink, and cured after being taken out.

In one embodiment, the method of depositing the second conductive layer includes the steps of:

By inkjet printing, several conductive strips are formed on the outer wall of the catheter body and cured.

In one embodiment, the manufacturing method further includes the following steps:

A protective coating is formed on the outer wall of the catheter body, and the protective coating covers the conductive lead coating and the conductive coil coating.

Compared with the traditional solution, the above interventional medical catheter and its manufacturing method have the following beneficial effects:

The above-mentioned interventional medical catheter and its manufacturing method respectively form a conductive coil coating and a conductive lead coating on the outer wall of the catheter body. The layer is connected to the conductive coil coating and extends to the connection end to connect the therapeutic instrument and the conductive coil coating to play the role of a wire. The conductive coil coating and the conductive lead coating are directly attached to the outer wall of the catheter body, which is conducive to reducing The diameter of the small interventional medical catheter reduces the possibility of injury to the human body.

Description of drawings

1 is a schematic structural diagram of an interventional medical catheter according to an embodiment;

FIG. 2 is a schematic structural diagram of a heating coil in the interventional medical catheter shown in FIG. 1;

3 is a schematic structural diagram of a temperature sensing coil in the interventional medical catheter shown in FIG. 1;

4 is a schematic diagram of forming a first conductive layer on the catheter body;

5 is a schematic diagram of forming a second conductive layer on the catheter body;

FIG. 6 is a cross-sectional view taken along the direction A-A in FIG. 1 .

Description of reference numbers:

100, interventional medical catheter; 110, catheter body; 111, connection end; 112, intervention end; 120, conductive coil coating; 121, heating coil; 1212, first arrangement line segment; 1214, first connection line segment; 122, temperature induction coil; 1222, the second arrangement segment; 1224, the second connection segment; 130, the conductive lead coating; 131, the first positive lead; 132, the first negative lead; 133, the second positive lead; 134, the second Negative lead; 101, the first conductive layer; 102, the second conductive layer.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully below. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

In the description of the present invention, it should be understood that the terms "first" and "second" are only used for description purposes, and cannot be interpreted as indicating or implying relative importance or the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 , an interventional medical catheter 100 according to an embodiment of the present invention includes a catheter body 110 , a conductive coil coating 120 and a conductive lead coating 130 .

The catheter body 110 has a connecting end 111 and an intervening end 112 disposed opposite to each other. The connection end 111 is used for externally connecting medical equipment, such as gas source equipment, electrical equipment, and the like. The insertion end 112 is the end that is inserted into the human body.

The conductive coil coating 120 and the conductive lead coating 130 are respectively formed on the outer wall of the catheter body 110. The conductive coil coating 120 and the conductive lead coating 130 are formed by curing after forming the conductive coating on the outer wall of the catheter body 110, if necessary. The conductive coating can also be patterned to form specific shapes. The conductive coil coating 120 is adjacent to the intervening end 112 and functions as electrodes, inductors, and the like. The conductive lead coating 130 is connected to the conductive coil coating 120 and extends toward the connection end 111 for connecting the therapeutic instrument and the conductive coil coating 120, and functions as a wire. The conductive coil coating 120 and the conductive lead coating 130 are directly attached to the outer wall of the catheter body 110 , which is beneficial to reduce the diameter of the interventional medical catheter 100 and reduce the possibility of damage to the human body.

The conduit body 110 is preferably a flexible conduit, such as a plastic conduit, specifically, but not limited to, polyamide (PA), polyurethane (PU), polyvinyl chloride (PVC), and polyolefin (PE) materials. In other examples, the catheter body 110 may also employ a rigid catheter.

The catheter body 110 is preferably a circular catheter. In one example, the outer diameter of the catheter body 110 is 1˜3 mm, the inner diameter is 0.8˜2.8 mm, and the thickness of the tube wall is 0.1˜1 mm. In other examples, the catheter body 110 may also employ a non-circular catheter.

In one example, the interventional end 112 of the catheter body 110 is chamfered and blunt.

Optionally, the conductive substance in the conductive coil coating 120 may be, but not limited to, at least one of nano metal particles, conductive polymers, graphene, and carbon nanotubes. In one example, the conductive substances in the conductive coil coating 120 are nano-silver particles, which are formed by coating nano-silver conductive ink and then curing. In this way, the amount of metal used can be reduced and the material cost can be reduced.

In one example, the thickness of the conductive coil coating 120 is 0.2 μm˜2 μm. In some specific examples, the thickness of the conductive coil coating 120 is 0.2 μm, 0.5 μm, 1 μm, 1.5 μm, 2 μm, and the like.

In one example, the line width of the conductive coil coating 120 is 50 μm˜300 μm. In some specific examples, the line width of the conductive coil coating 120 is 50 μm, 100 μm, 150 μm, 200 μm, 300 μm, and the like.

In one example, the square resistance of the conductive coil coating 120 is 100Ω/□˜1000Ω/□. In some specific examples, the square resistance of the conductive coil coating 120 is 200Ω/□, 400Ω/□, 600Ω/□, 800Ω/□, 1000Ω/□, and the like.

Optionally, the conductive substance in the conductive lead coating 130 may be, but not limited to, at least one of nano metal particles, conductive polymers, graphene, and carbon nanotubes. In one example, the conductive substances in the conductive lead coating 130 are nano-silver particles, which are formed by coating nano-silver conductive ink and then curing. In this way, the amount of metal used can be reduced and the material cost can be reduced.

In one example, the thickness of the conductive lead coating 130 is 2 μm˜10 μm. In some specific examples, the thickness of the conductive lead coating 130 is 2 μm, 4 μm, 5 μm, 6 μm, 8 μm, and the like.

In one example, the line width of the conductive lead coating 130 is 50 μm˜500 μm. In some specific examples, the line width of the conductive lead coating 130 is 50 μm, 100 μm, 200 μm, 300 μm, 500 μm, and the like.

In one example, the square resistance of the conductive lead coating 130 is 0.5Ω/□˜10Ω/□. In some specific examples, the square resistance of the conductive lead coating 130 is 0.5Ω/□, 1Ω/□, 2Ω/□, 5Ω/□, 10Ω/□, and the like.

As shown in FIGS. 1 and 2 , in one example, the conductive coil coating 120 includes a heating coil 121 . The heating coil 121 generates heat when the low voltage is energized, and can perform ablation treatment on the affected area.

In this example, the conductive lead coating 130 includes a first positive lead 131 and a first negative lead 132 . The first positive lead 131 and the first negative lead 132 are respectively connected to both ends of the heating coil 121 and are connected to the connection end 111 respectively. extend. The first positive lead 131 , the heating coil 121 and the first negative lead 132 form a current loop.

In the illustrated specific example, the first positive lead 131 and the first negative lead 132 both extend to the connection end 111 along the axial direction of the catheter body 110 .

As shown in FIG. 2 , in one example, the heating coil 121 includes a plurality of first arrangement line segments 1212 and a plurality of first connection line segments 1214 . A plurality of first arrangement line segments 1212 extend along the axial direction of the catheter body 110 and are arranged side by side, adjacent first arrangement line segments 1212 are connected by first connecting line segments 1214 , and the current directions of adjacent first arrangement line segments 1212 are opposite.

As shown in FIGS. 1 and 3 , in one example, the conductive coil coating 120 includes a temperature sensing coil 122 . The temperature sensing coil 122 detects the temperature at the position of the catheter insertion end 112 in real time. If the temperature exceeds the set temperature range, the heating coil 121 can be controlled to be powered off and stop working. If the temperature does not exceed the set temperature range, the heating coil 121 is energized to work.

In this example, the conductive lead coating 130 includes a second positive electrode lead 133 and a second negative electrode lead 134. The second positive electrode lead 133 and the second negative electrode lead 134 are respectively connected to two ends of the temperature sensing coil 122, and are respectively connected to the connecting ends. 111 extension. The second positive lead 133, the temperature sensing coil 122 and the second negative lead 134 form a current loop.

In the illustrated specific example, the second positive lead 133 and the second negative lead 134 both extend to the connection end 111 along the axial direction of the catheter body 110 .

As shown in FIG. 3 , in one example, the temperature induction coil 122 includes a plurality of second arrangement line segments 1222 and a plurality of second connection line segments 1224 , and the plurality of second arrangement line segments 1222 are arc-shaped and nested in layers, The connected second arrangement line segments 1222 are connected by second connection line segments 1224, and the current directions of the adjacent second arrangement line segments 1222 are opposite.

In the specific example shown, the conductive coil coating 120 includes a heating coil 121 and a temperature sensing coil 122 . Further, the heating coil 121 and the temperature sensing coil 122 are respectively located on opposite sides of the catheter body 110 .

In one example, the interventional medical catheter 100 further includes a protective coating (not shown) covering the conductive lead coating 130 and the conductive coil coating 120 . The protective coating can protect the conductive lead coating 130 and the conductive coil coating 120 while avoiding direct contact with the human body.

The protective coating can expose the joint position of the conductive lead coating 130, which is convenient for subsequent connection with the treatment device.

In one example, the protective coating contains a coating matrix and an antimicrobial agent dispersed in the coating matrix. Antibacterial agents can be, for example, chitosan oligosaccharide, triclosan and the like. The coating substrate can be selected from bio-affinity materials, so that the surface of the interventional medical catheter 100 has both antibacterial properties and bio-affinity properties.

In one example, the thickness of the protective coating is 2 μm˜10 μm. In some specific examples, the thickness of the protective coating is 2 μm, 4 μm, 6 μm, 8 μm, 10 μm, and the like.

One of the objectives of the present invention is to provide a method for manufacturing the interventional medical catheter 100 of any of the above examples, and the scheme is as follows:

A manufacturing method of an interventional medical catheter 100, comprising the following steps:

Obtain the catheter body 110, the catheter body 110 has a connection end 111 and an intervention end 112 arranged oppositely;

A conductive coil coating 120 and a conductive lead coating 130 are formed on the outer wall of the catheter body 110 , the conductive coil coating 120 is close to the intervening end 112 , and the conductive lead coating 130 is connected to the conductive coil coating 120 and extends toward the connection end 111 .

In one example, a method of forming conductive coil coating 120 and conductive lead coating 130 includes the steps of:

As shown in FIG. 4 , a first conductive layer 101 is deposited on the outer wall of the catheter body 110 , and the first conductive layer 101 is close to the intervening end 112 ;

As shown in FIG. 5 , a second conductive layer 102 is deposited on the outer wall of the conduit body 110 , and the second conductive layer 102 is connected to the first conductive layer 101 and extends toward the connection end 111 .

The first conductive layer 101 and the second conductive layer 102 are etched, so that the first conductive layer 101 is partially etched to form a conductive coil coating 120, and the second conductive layer 102 is partially etched to form a conductive lead coating. Layer 130.

In one example, the method of depositing the first conductive layer 101 includes the following steps:

The insertion end 112 of the catheter body 110 is dipped into the conductive ink, and cured after being taken out.

In one example, the method of depositing the second conductive layer 102 includes the following steps:

Through inkjet printing, several conductive strips are formed on the outer wall of the catheter body 110 and cured.

In one example, the etching process is laser etching. The traditional method of making electrodes requires winding coils. When the pattern changes, the mold needs to be remade. Moreover, the injection resin also needs to make the mold. The development cycle is long and the cost is higher. In this example, laser etching is used. When the coil pattern is changed, it is only necessary to import a new drawing. The laser equipment can etch the corresponding circuit according to the graphic trajectory of the drawing. No mold opening is required, and the development time is faster and the cost is lower.

In one of the examples, the production method also includes the following steps:

A protective coating is formed on the outer wall of the catheter body 110 , and the protective coating covers the conductive lead coating 130 and the conductive coil coating 120 .

In one example, a method for manufacturing an interventional medical catheter 100 includes the following steps:

Obtain the catheter body 110, the catheter body 110 has a connection end 111 and an intervention end 112 arranged oppositely;

The insertion end 112 of the catheter body 110 is dipped into the conductive ink, taken out and then cured to form the first conductive layer 101;

By inkjet printing, two conductive strips are formed on the outer wall of the catheter body 110, the two conductive strips are located on opposite sides of the catheter body 110 respectively, extend from the first conductive layer 101 to the connection end 111, and solidify to form a second conductive strip layer 102;

The catheter body 110 on which the first conductive layer 101 and the second conductive layer 102 are deposited is placed on the laser laser platform. The two ends of the laser laser platform are provided with rotating devices, which can respectively fix the two ends of the catheter and straighten the catheter. The first conductive layer 101 is etched by laser to form the heating coil 121 and the temperature sensing coil 122 . The second conductive layer 102 is etched by laser to form the first positive lead 131 and the first negative lead 132 respectively connected to both ends of the heating coil 121 , and the second positive lead 132 respectively connected to both ends of the temperature sensing coil 122 133 and the second negative lead 134.

A protective coating is formed on the outer wall of the catheter body 110 , and the protective coating covers the conductive lead coating 130 and the conductive coil coating 120 .

As shown in Figure 6, the coil and the corresponding lead are on the same side of the circumference of the catheter. The coil is designed according to the line width of 50 microns and the line spacing of 50 microns. When the outer diameter of the catheter is 1.67 mm, the width W of the coil on the circumference is 0.6mm, the angle A formed in the circle is 42.2°, and the height H is 0.06mm. According to the characteristics of the laser equipment, when the height H is less than 0.12mm, lines can be engraved on it. Therefore, when the heating coil 121, the first positive lead 131 and the first negative lead 132 are formed by etching, the guide tube does not need to be rotated, and only after the engraving is completed, the temperature sensing coil 122, the second positive lead 133 and the second negative lead need to be etched At 134, the catheter needs to be turned once.

The above-mentioned interventional medical catheter 100 and the manufacturing method thereof respectively form a conductive coil coating 120 and a conductive lead coating 130 on the outer wall of the catheter body 110, and the conductive coil coating 120 is arranged close to the intervention end 112 and serves as an electrode, an inductor, etc. The conductive lead coating 130 is connected to the conductive coil coating 120 and extends to the connection end 111 to connect the therapeutic instrument and the conductive coil coating 120 to play the role of a wire, the conductive coil coating 120 and the conductive lead coating The 130 is directly attached to the outer wall of the catheter body 110 , which is beneficial to reduce the diameter of the interventional medical catheter 100 and reduce the possibility of injury to the human body.

Specific examples are provided below to further illustrate the present invention, but the present invention is not limited to the following examples. It should be understood that the appended claims summarize the scope of the present invention. It should be appreciated that certain changes made to the various embodiments of the present invention will be covered by the spirit and scope of the claims of the present invention.

Example 1

The present embodiment provides a method for manufacturing an interventional medical catheter, comprising the following steps:

Obtain the catheter body with an outer diameter of 1.67mm.

The insertion end of the catheter body was immersed in the nano-silver conductive ink, and baked at 60 degrees for 30 minutes after taking it out to form a first conductive layer with a thickness of 1 μm. At this time, the outer diameter of the catheter was 1.672 mm.

By inkjet printing, two conductive strips were formed on the outer wall of the catheter body, and baked at 60 degrees for 30 minutes to form a second conductive layer with a thickness of 10 μm. At this time, the outer diameter of the catheter was 1.692 mm.

By laser etching, the first conductive layer and the second conductive layer are patterned to form a conductive coil coating and a conductive lead coating.

Soak the catheter in the antibacterial gel solution for 3 minutes, leaving 5mm of the connecting end unsoaked, exposing the metal joint position, which is convenient for subsequent connection with the treatment equipment. Take out and place in a hot air oven to cure at 60 degrees for 30 minutes. A protective coating was formed with a thickness of 10 μm. The outer diameter of the catheter after application of the protective coating is 1.712 mm.

Comparative Example 1

This comparative example provides a manufacturing method of an interventional medical catheter, comprising the following steps:

Obtain the catheter body with an outer diameter of 1.67mm.

Use 0.2mm wire to wrap the catheter body, and the outer diameter of the catheter at this time is 2.07mm.

The catheter after winding the metal wire is implanted into the injection mold, the injection resin material fills the outer surface of the catheter, and the metal wire is encapsulated. The resin material is 0.3mm higher than the metal wire, and the outer diameter of the catheter after the encapsulation treatment is 2.67mm.

It can be seen from the comparison between the above Example 1 and Comparative Example 1 that the manufacturing method of the present invention can significantly reduce the diameter of the interventional medical catheter, and can also reduce the post-assembly process of the circuit and reduce the cost of the catheter.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (15)

1. An interventional medical catheter comprising a catheter body, a conductive coil coating, and a conductive lead coating; the catheter body is provided with a connecting end and a dielectric end which are oppositely arranged, the conductive coil coating and the conductive lead coating are respectively formed on the outer wall of the catheter body, the conductive coil coating is close to the dielectric end, and the conductive lead coating is connected with the conductive coil coating and extends towards the connecting end.

2. The interventional medical catheter of claim 1, wherein the electrically conductive coil coating comprises a heat generating coil, and the electrically conductive lead coating comprises a first positive lead and a first negative lead, the first positive lead and the first negative lead being connected to respective ends of the heat generating coil and extending toward the connection ends, respectively.

3. The interventional medical catheter of claim 2, wherein the heat generating coil includes a plurality of first arrangement line segments and a plurality of first connection line segments, the plurality of first arrangement line segments extending in an axial direction of the catheter body and being arranged side by side, adjacent first arrangement line segments being connected by the first connection line segments, current directions of adjacent first arrangement line segments being opposite.

4. The interventional medical catheter of any one of claims 1-3, wherein the electrically conductive coil coating comprises a temperature sensing coil, and the electrically conductive lead coating comprises a second positive lead and a second negative lead, the second positive lead and the second negative lead being connected to two ends of the temperature sensing coil, respectively, and extending toward the connection ends, respectively.

5. The interventional medical catheter of claim 4, wherein the temperature sensing coil comprises a plurality of second alignment line segments and a plurality of second connecting line segments, the plurality of second alignment line segments are arc-shaped and nested one above the other, the connected second alignment line segments are connected by the second connecting line segments, and current directions of adjacent second alignment line segments are opposite.

6. The interventional medical catheter of any one of claims 1-3, 5, wherein the conductive material in the conductive coil coating is selected from at least one of nano-metal particles, conductive polymers, graphene, carbon nanotubes; and/or

The conductive substance in the conductive lead coating is selected from at least one of nano metal particles, conductive polymers, graphene and carbon nanotubes.

7. The interventional medical catheter of any one of claims 1-3, 5, wherein the conductive coil coating has a thickness of 0.20 μ ι η to 2 μ ι η; and/or

The thickness of the conductive lead coating is 2-10 μm.

8. The interventional medical catheter of any one of claims 1-3, 5, further comprising a protective coating covering the conductive lead coating and the conductive coil coating.

9. The interventional medical catheter of claim 8, wherein the protective coating comprises a coating matrix and an antimicrobial agent dispersed in the coating matrix.

10. A method of making an interventional medical catheter, comprising the steps of:

obtaining a catheter body, wherein the catheter body is provided with a connecting end and a medium end which are oppositely arranged;

forming a conductive coil coating on an outer wall of the catheter body proximate the insertion end and a conductive lead coating connected to the conductive coil coating and extending toward the connection end.

11. The method of manufacturing of claim 10, wherein the method of forming the conductive coil coating and the conductive lead coating comprises the steps of:

depositing a first conductive layer on an outer wall of the catheter body, the first conductive layer proximate to the insertion end;

depositing a second conductive layer on the outer wall of the catheter body, the second conductive layer connected to the first conductive layer and extending toward the connection end;

and etching the first conductive layer and the second conductive layer to enable the first conductive layer to be partially etched to form the conductive coil coating and enable the second conductive layer to be partially etched to form the conductive lead coating.

12. The method of claim 11, wherein the etching process is laser etching.

13. The method of claim 11, wherein depositing the first conductive layer comprises:

and immersing the intervention end of the catheter body into conductive ink, taking out and curing.

14. The method of manufacturing of claim 11, wherein the method of depositing the second conductive layer comprises:

and forming a plurality of conductive strips on the outer wall of the conduit body by ink-jet printing and curing.

15. The method of manufacturing according to any one of claims 10 to 14, further comprising the steps of:

forming a protective coating on an outer wall of the catheter body, the protective coating covering the conductive lead coating and the conductive coil coating.

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