Interventional catheter and interventional system for calcification lesion microneedle puncture

Abstract

The utility model relates to an intervention catheter and an intervention system for calcification lesion microneedle puncture. The interventional catheter solves the technical problem that an existing interventional catheter is unreasonable in design. The interventional catheter for calcification lesion microneedle puncture comprises a catheter main body, wherein an infusion cavity, a positioning cavity and a cable cavity are formed in the catheter main body at intervals; the infusion balloon is connected to the outer side of the catheter body in a sleeving mode and connected with the infusion cavity, and the infusion balloon comprises arc-shaped convex-face balloon bodies arranged at intervals in the circumferential direction, infusion elastic balloon bodies connected with the adjacent arc-shaped convex-face balloon bodies and capable of protruding out of the outer walls of the arc-shaped convex-face balloon bodies, and micro-needle puncture faces arranged on the outer walls of the infusion elastic balloon bodies; the two positioning balloons are arranged on the two sides of the infusion balloon in a spaced mode and communicated with the positioning cavity. According to the utility model, the infusion balloon is controlled to be relatively closed through the two positioning balloons, meanwhile, the aim that the infusion balloon is attached to a vascular lesion position is achieved, the administration rate is controlled, and quantitative and accurate drug delivery is realized.

Description

Technical Field

[0001] This utility model belongs to the field of interventional catheters and relates to an interventional catheter and interventional system for microneedle puncture of calcified lesions. Background Technology

[0002] For example, Chinese patent literature discloses a multifunctional catheter for interventional therapy [201921818758.0], comprising a catheter body with at least three mutually separated cavities; a balloon located on the catheter body, the balloon being made of a semi-permeable membrane material, the inner side of the balloon communicating with one of the cavities of the catheter body; and an oscillating unit that vibrates or deforms after acquiring external energy, disposed within the balloon, with the cable of the oscillating unit arranged in another cavity of the catheter body. During use, medication is introduced into the cavities, inflating the balloon, while the balloon adheres to the inner wall of the blood vessel, thus achieving directional perfusion. Targeted drug delivery through the dedicated cavities avoids the problems of drug loss and drug contact with the lesion surface during the delivery process of traditional drug balloons in blood vessels.

[0003] The drawbacks of the above technical solutions are: the use of targeted drug delivery that fits the lesion location results in poor drug delivery and a significant loss of drug solution; moreover, the balloon is prone to displacement during the expansion process, reducing the accuracy of drug delivery. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an interventional catheter and system for microneedle puncture of calcified lesions.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] The interventional catheters used for microneedle puncture of calcified lesions include:

[0007] The catheter body has infusion chambers, positioning chambers, and cable chambers arranged at intervals inside;

[0008] An infusion balloon is fitted over the outside of the catheter body and connected to the infusion cavity. The infusion balloon includes circumferentially spaced arc-shaped convex balloons, an infusion elastic balloon connecting adjacent arc-shaped convex balloons and capable of protruding from the outer wall of the arc-shaped convex balloon, and a microneedle puncture surface disposed on the outer wall of the infusion elastic balloon.

[0009] The positioning balloon has two spaced-apart parts on both sides of the infusion balloon and connected to the positioning cavity. The positioning balloon includes circumferentially spaced arc-shaped concave balloons and a positioning elastic balloon that connects adjacent arc-shaped concave balloons and can protrude from the outer wall of an arc-shaped convex balloon.

[0010] An ultrasonic transducer is installed in the infusion balloon, and a power supply cable for connecting the ultrasonic transducer is provided in the cable cavity.

[0011] Furthermore, the catheter body is provided with a recessed mounting groove into which the infusion balloon and the positioning balloon can be inserted.

[0012] Furthermore, the ultrasonic transducer is disposed at the bottom of the mounting groove and does not protrude from the end face of the conduit body.

[0013] Furthermore, the circumferential outer wall of the infusion balloon can be recessed into the mounting groove.

[0014] Furthermore, the two ends of the infusion balloon are annular elastic bladders, and the maximum outer diameter of the annular elastic bladders is greater than the outer diameter of the ends of the infusion balloon.

[0015] Furthermore, the front end of the conduit is provided with a base, a sensor is provided on the base, and the cable cavity is provided with a transmission cable connected to the sensor.

[0016] Furthermore, the catheter body is also provided with an adsorption cavity, and the front end of the catheter body is also provided with an adsorption notch for connecting the adsorption cavity.

[0017] Furthermore, the tail end of the catheter body is provided with an infusion port that connects to the infusion chamber, the positioning chamber, and the adsorption chamber respectively.

[0018] This invention also provides an interventional system having an interventional catheter for microneedle puncture of calcified lesions as described above.

[0019] Compared with existing technologies, the interventional catheter for microneedle puncture of calcified lesions provides a more closed control of the infusion balloon through two positioning balloons, thereby improving the positioning effect of the infusion balloon to achieve the purpose of conforming to the location of the vascular lesion. Moreover, the microneedle puncture surface can conform to the lesion location, and after puncturing the lesion, it can achieve the effect of drug delivery positioning and penetrating drug injection. Through an external drug delivery drive device, the drug delivery rate can be controlled and a quantitative and precise drug delivery volume can be achieved. Attached Figure Description

[0020] Figure 1 This invention provides a schematic diagram of an interventional catheter and interventional system for microneedle puncture of calcified lesions.

[0021] Figure 2 for Figure 1 A schematic diagram of the main body of the interventional catheter used for microneedle puncture of calcified lesions.

[0022] Figure 3 for Figure 1 Schematic diagram of the infusion balloon contraction state of the interventional catheter used for microneedle puncture of calcified lesions Figure 1 .

[0023] Figure 4 for Figure 1 Schematic diagram of the infusion balloon contraction state of the interventional catheter used for microneedle puncture of calcified lesions Figure 2 .

[0024] Figure 5 for Figure 1 Schematic diagram of the infusion balloon expansion state of the interventional catheter used for microneedle puncture of calcified lesions. Figure 1 .

[0025] Figure 6 for Figure 1 Schematic diagram of the infusion balloon expansion state of the interventional catheter used for microneedle puncture of calcified lesions. Figure 2 .

[0026] Figure 7 for Figure 1 A schematic diagram of the positioning balloon contraction state of the interventional catheter used for microneedle puncture of calcified lesions.

[0027] Figure 8 for Figure 1 A schematic diagram of the positioning balloon expansion state of the interventional catheter used for microneedle puncture of calcified lesions.

[0028] In the diagram, 10 is the catheter body; 11 is the infusion chamber; 12 is the positioning chamber; 13 is the cable chamber; 14 is the mounting groove; 15 is the adsorption chamber; 16 is the adsorption notch; 20 is the infusion balloon; 21 is the arc-shaped convex balloon; 22 is the infusion elastic balloon; 23 is the microneedle puncture surface; 24 is the annular elastic balloon; 30 is the positioning balloon; 31 is the arc-shaped concave balloon; 32 is the positioning elastic balloon; 40 is the ultrasonic transducer; 41 is the power supply cable; 50 is the base; 51 is the sensor; 52 is the transmission cable; and 60 is the infusion interface. Detailed Implementation

[0029] Example 1, please refer to Figure 1 This is a schematic diagram of an interventional catheter and system for microneedle puncture of calcified lesions provided by this utility model. The interventional catheter for microneedle puncture of calcified lesions includes: a catheter body 10, multiple cavities spaced apart inside the catheter body 10, an infusion balloon 20, a positioning balloon 30, an ultrasonic transducer 40, etc., disposed outside the catheter body 10. This interventional catheter for microneedle puncture of calcified lesions also includes other functional components and specific structures, such as electrical connection components, control components, and installation structures, all of which are technologies known to those skilled in the art, and therefore will not be described in detail here.

[0030] In this embodiment, please refer to Figure 2The catheter body 10 is a tubular structure used for insertion into blood vessels for detection and treatment. The catheter body 10 has several spaced-apart axial cavities, specifically an infusion cavity 11, a positioning cavity 12, a cable cavity 13, and an adsorption cavity 15, for the passage of drugs, liquids, cables, etc. The tail end of the catheter body 10 is provided with perfusion interfaces 60 that connect to the infusion cavity 11, the positioning cavity 12, and the adsorption cavity 15 respectively. Different cavities are connected using different perfusion interfaces 60, and the infusion flow rate and rate are controlled by valves and control components. It should be noted that a guidewire structure is also provided at the front end of the catheter body. By moving the end of the guidewire, the displacement of the entire catheter body 10 is controlled; this is existing technology and will not be described in detail here.

[0031] In this embodiment, please refer to Figure 1 A base 50 is provided at the front end of the catheter, and a sensor 51 is provided on the base 50. The sensor 51 is a pressure sensor. By receiving pressure data in the blood vessel, it can detect whether there is a narrowing problem in the inner wall of the blood vessel. A transmission cable 52 connected to the sensor 51 is provided in the cable cavity 13. The transmission cable 52 receives, identifies and processes the data obtained by the sensor 51, and completes the automated processing in conjunction with the control components.

[0032] In this embodiment, please refer to Figures 3 to 6 The infusion balloon 20 is used to deliver medication. The infusion balloon 20 is fitted onto the outside of the catheter body 10 and connected to the infusion cavity 11. The outer dimension of the infusion balloon 20 is controlled by the amount of fluid inside. Specifically, the infusion balloon 20 includes circumferentially spaced arc-shaped convex balloons 21, which are arranged along the axial direction of the catheter body 10. These arc-shaped convex balloons 21 are rigid, with low deformation, and can stably conform to the inner wall of the blood vessel during the expansion of the infusion balloon 20. Adjacent arc-shaped convex balloons 21 are connected to elastic infusion balloons 22 that protrude from the outer wall of the arc-shaped convex balloons 21. These elastic infusion balloons 22 have elastic deformation properties, thereby controlling the overall dimensional changes of the infusion balloon 20. Initially, the infusion balloon 20 is in a contracted state. As the medication is filled into the infusion balloon 20, the infusion balloon 20 gradually expands until it is completely filled. Then, the elastic infusion bladder 22 protrudes from the outer wall of the arc-shaped convex bladder 21, thus conforming to the location of the vascular lesion.

[0033] In this embodiment, a microneedle puncture surface 23 is provided on the outer wall of the infusion elastic capsule 22. The microneedle puncture surface 23 is a hollow microneedle. The microneedle puncture surface 23 can fit the lesion location and puncture the lesion to achieve the effect of drug delivery positioning and penetrating drug injection. Through an external drug injection driving device, the drug delivery rate can be controlled and a quantitative and precise drug delivery amount can be achieved.

[0034] In other embodiments, a microneedle puncture surface 23 is provided on the outer wall of the infusion elastic balloon 22. The microneedle puncture surface 23 is a solid microneedle, and the infusion balloon 20 is a semi-permeable membrane structure. The microneedle puncture surface 23 penetrates the lesion site, and the drug is injected through the infusion balloon 20.

[0035] In this embodiment, please refer to Figures 7 to 8 The positioning balloon 30 has two spaced-apart sections on both sides of the infusion balloon 20. The positioning balloon 30 is connected to the positioning cavity 12 and inflated with water to form two positioning points on both sides of the infusion balloon 20. Specifically, the positioning balloon 30 includes circumferentially spaced arc-shaped concave balloons 31, which are rigid and have low deformation. Adjacent arc-shaped concave balloons 31 are connected to positioning elastic balloons 32 that protrude from the outer wall of the arc-shaped convex balloon 21. The arc-shaped concave balloons 31 maintain the overall shape of the positioning balloon 30, while the arc-shaped concave balloons 31 fit the blood vessel wall with gaps to avoid large-scale blockage. The elastic deformation properties of the positioning elastic balloons 32 control the expansion and contraction of the positioning balloon 30. The two positioning balloons 30 provide a more enclosed control of the infusion balloon 20, improving the positioning effect and increasing drug delivery efficiency.

[0036] For optimized viewing, please refer to Figure 3 , Figure 5 The catheter body 10 is provided with a recessed mounting groove 14 for the infusion balloon 20 and the positioning balloon 30 to be inserted. In the contracted state, the circumferential outer wall of the infusion balloon 20 is recessed into the mounting groove 14. The mounting groove 14 prevents the infusion balloon 20 and the positioning balloon 30 from protruding from the outer wall of the catheter body 10 in the contracted state, ensuring the flatness of the catheter body 10. An ultrasonic transducer 40 is disposed within the infusion balloon 20. A power supply cable 41 for connecting the ultrasonic transducer 40 is provided in the cable cavity 13. An external power supply is connected to the power supply cable 41, and the ultrasonic transducer 40 vibrates the medication in the infusion balloon 20, achieving rapid drug delivery and reducing injection time.

[0037] In this embodiment, the ultrasonic transducer 40 is located at the bottom of the mounting groove 14, making the installation more stable and reliable, and it does not protrude from the end face of the catheter body 10, thus avoiding contact between the infusion balloon 20 and the ultrasonic transducer 40.

[0038] Ideally, the two ends of the infusion balloon 20 are annular elastic bladders 24, meaning that the two ends of the infusion balloon 20 are also elastically deformable. The maximum outer diameter of the annular elastic bladder 24 is larger than the outer diameter of the end of the infusion balloon 20. The infusion balloon 20 is thicker at both ends and thinner in the middle. In actual use, this makes the height of the protrusion at both ends and the middle of the infusion balloon 20 tend to be flush, increasing the contact area and improving the drug injection efficiency.

[0039] In this embodiment, please refer to Figure 1The catheter body 10 is also provided with an adsorption chamber 15, which is connected to a pump. At the front end of the catheter body 10, there is an adsorption notch 16 connected to the adsorption chamber 15. The pump provides negative pressure at the adsorption notch 16 to absorb thrombi and residual values ​​generated by microneedle puncture.

[0040] Example 2: This utility model also provides an interventional system having an interventional catheter for microneedle puncture of calcified lesions as described above. Except for the interventional catheter for microneedle puncture of calcified lesions, all other components are existing technology or commercially available parts.

[0041] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An interventional catheter for microneedle puncture of calcified lesions, characterized in that, include: The catheter body (10) is provided with an infusion chamber (11), a positioning chamber (12), and a cable chamber (13) at intervals inside. An infusion balloon (20) is fitted over the outside of the catheter body (10) and connected to the infusion cavity (11). The infusion balloon (20) includes circumferentially spaced arc-shaped convex balloons (21), an infusion elastic balloon (22) connecting adjacent arc-shaped convex balloons (21) and capable of protruding from the outer wall of the arc-shaped convex balloons (21), and a microneedle puncture surface (23) disposed on the outer wall of the infusion elastic balloon (22). The positioning balloon (30) has two spaced-apart sides of the infusion balloon (20) and communicates with the positioning cavity (12). The positioning balloon (30) includes arc-shaped concave balloons (31) spaced circumferentially, and a positioning elastic balloon (32) connecting adjacent arc-shaped concave balloons (31) and capable of protruding from the outer wall of the arc-shaped convex balloon (21). An ultrasonic transducer (40) is disposed in the infusion balloon (20), and a power supply cable (41) for connecting the ultrasonic transducer (40) is provided in the cable cavity (13).

2. The interventional catheter for microneedle puncture of calcified lesions according to claim 1, characterized in that, The catheter body (10) is provided with a recessed mounting groove (14) into which the infusion balloon (20) and positioning balloon (30) can be inserted.

3. The interventional catheter for microneedle puncture of calcified lesions according to claim 2, characterized in that, The ultrasonic transducer (40) is located at the bottom of the mounting groove (14) and does not protrude from the end face of the conduit body (10).

4. The interventional catheter for microneedle puncture of calcified lesions according to claim 3, characterized in that, The circumferential outer wall of the infusion balloon (20) can be recessed into the mounting groove (14).

5. The interventional catheter for microneedle puncture of calcified lesions according to claim 1, characterized in that, The two ends of the infusion balloon (20) are annular elastic bladders (24), and the maximum outer diameter of the annular elastic bladders (24) is greater than the outer diameter of the end of the infusion balloon (20).

6. The interventional catheter for microneedle puncture of calcified lesions according to claim 1, characterized in that, The front end of the conduit is provided with a base (50), a sensor (51) is provided on the base (50), and the cable cavity (13) is provided with a transmission cable (52) connected to the sensor (51).

7. The interventional catheter for microneedle puncture of calcified lesions according to claim 1, characterized in that, The catheter body (10) is also provided with an adsorption cavity (15), and the front end of the catheter body (10) is also provided with an adsorption notch (16) for connecting the adsorption cavity (15).

8. The interventional catheter for microneedle puncture of calcified lesions according to claim 7, characterized in that, The end of the catheter body (10) is provided with an infusion port (60) that connects to the infusion chamber (11), the positioning chamber (12), and the adsorption chamber (15).

9. An intervention system, characterized in that, An interventional catheter for microneedle puncture of calcified lesions as described in any one of claims 1-8.

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