Intracranial balloon dilatation catheter

Abstract

The invention discloses an intracranial balloon dilatation catheter which comprises an inner tube, an outer tube, a head end tube, a transition unit and a balloon unit, the inner tube is located in the outer tube, the transition unit is located between the head end tube and the inner tube, and the balloon unit comprises a balloon body, a first pin connected with the balloon body and a second pin connected with the balloon body. The first pin is fixed to the end of the head end tube and the end of the inner tube through laser welding, and the second pin is fixed to the end of the outer tube through laser welding. According to the balloon catheter, the joint of the head end tube and the balloon is smoother, and the head end tube has good flexibility, so that the situation that the head end tube stimulates the inner side wall of a blood vessel and hurts a human body is avoided.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an intracranial balloon dilatation catheter. Background Art

[0002] In modern life, sometimes people will have some physiological diseases in their blood vessels. With the advancement of technology, catheter intervention has gradually become one of the mainstream medical treatment methods. The balloon expansion catheter is mainly composed of a balloon, a catheter and a dilator, and the balloon generally has a balloon pin. The catheter generally includes an inner tube, an outer tube and a head end tube. The head end tube often has better flexibility to avoid damage to the human body's blood vessels. There are multiple connection methods between the balloon pin and the head end tube and the inner tube, but generally after the connection, an obvious step will be generated between the head end tube and the balloon, so that the step will cause the step to stimulate the inside of the blood vessel when the balloon catheter is used, thereby causing damage to the human body. And when the developed balloon catheter is made, if it is necessary to make a balloon catheter with different flexibility of the head end tube, it is often necessary to redesign and reselect the material, which brings more difficulties to the design. Summary of the invention

[0003] Purpose of the invention: This application aims to overcome the defects of the prior art and provide an intracranial balloon dilatation catheter.

[0004] Technical solution: A balloon dilatation catheter, comprising an inner tube, an outer tube, a head end tube, a transition unit and a balloon unit, wherein the inner tube is located inside the outer tube, the transition unit is located between the head end tube and the inner tube, the balloon unit comprises a balloon body, a first pin connected to the balloon body, and a second pin connected to the balloon body, the first pin is fixed to the ends of the head end tube and the inner tube by laser welding, and the second pin is fixed to the end of the outer tube by laser welding.

[0005] Thus, the first tube pin connects the head end tube and the inner tube, and after the connection, the connection has better flatness.

[0006] Further, the head end tube includes a cylindrical part and a frustum-shaped part connected to the cylindrical part, the cylindrical part has a first annular step portion, the first annular step portion has a first annular groove, the first annular groove has a plurality of first limiting grooves distributed in an annular manner with equal spacing, the end of the inner tube has a second annular step portion, the second annular step portion has a second annular groove, the second annular groove has a plurality of second limiting grooves distributed in an annular manner with equal spacing; the transition unit includes a first developing ring, a second developing ring and a plurality of transition plates located between the first developing ring and the second developing ring, the transition plate includes a first plug plate, a second plug plate and a connecting plate connecting the first plug plate and the second plug plate, the first developing ring includes a first circular portion and a plurality of first limiting grooves located on the inner side of the first circular portion and distributed in an annular manner with equal spacing, The first limit block, the second developing ring includes a second annular portion and a plurality of second limit blocks located on the inner side of the second annular portion and distributed in an annular manner with equal spacing and cooperating with the second limit groove, the first developing ring has a plurality of first plug holes distributed in an annular manner with equal spacing, the first plug plate can be inserted into the first plug hole, the second developing ring has a plurality of second plug holes distributed in an annular manner with equal spacing, the second plug plate can be inserted into the second plug hole; the first tube pin surrounds the first annular step portion, the first annular groove, the transition unit, the second annular groove and the second annular step portion, the end of the first tube pin away from the balloon body is located at the first annular step portion and is fixed to the first annular step portion by laser welding, and the end of the first tube pin close to the balloon body is located at the second annular step portion and is fixed to the second annular step portion by laser welding.

[0007] Furthermore, the transition plate is made of polymer material.

[0008] More specifically, the transition plate is made of nylon material.

[0009] Furthermore, the number of the first limiting groove, the first limiting block, the second limiting groove and the second limiting block are all six, and the number of the transition plates at the transition unit is between 2 and 6.

[0010] Therefore, by selecting different numbers of transition plates, when higher flexibility is required, a smaller number of transition plates are selected; when lower flexibility is required, a larger number of transition plates are selected.

[0011] Furthermore, the first developing ring and the second developing ring are both made of stainless steel.

[0012] Furthermore, the cross-sections of the first plug plate, the second plug plate and the connecting plate are all arc-shaped.

[0013] Furthermore, the outer side of the second developing ring has an annular accommodating groove and a notch connected to the annular accommodating groove, and the outer side of the inner tube has a strip accommodating groove, and the strip accommodating groove extends to the second annular step portion and is connected to the notch; a pressure sensor is installed at the end of at least one second jack, and the wire of the pressure sensor passes through the annular accommodating groove, the notch and the strip accommodating groove.

[0014] Furthermore, the second plug hole has a wire through hole connected to the annular receiving groove.

[0015] Furthermore, there is sealant between the wire through-hole and the wire.

[0016] Beneficial effects: The balloon catheter of the present application combines the development function with the head end tube having a good flexible shell bending function, so that the balloon catheter has good development ability and flexible bending ability, thereby being more suitable for use in blood vessels and avoiding damage to blood vessels.

[0017] The balloon catheter of the present application can be manufactured into balloon catheters with different head end tube flexibility by using the same parts and selecting the number of transition plates, thereby providing greater manufacturing selectivity.

[0018] The first tube pin of the balloon unit of the balloon catheter has better flatness with the head end tube and the inner tube, thereby further avoiding stimulation of the blood vessels by the protrusions formed during the manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of component separation;

[0020] Figure 2 This is an enlarged view of area A;

[0021] Figure 3 This is an enlarged view of area B;

[0022] Figure 4 This is an enlarged view of area C;

[0023] Figure 5 Assemble the schematic diagram for the transition unit;

[0024] Figure 6 This is an enlarged view of area D;

[0025] Figure 7 This is a schematic diagram of the transition unit installed between the head end tube and the inner tube;

[0026] Figure 8 This is an enlarged view of area E;

[0027] Fig. 9 Schematic diagram of a balloon catheter. DETAILED DESCRIPTION

[0028] Reference numerals: 1 outer tube; 2 inner tube; 2.1 strip-shaped receiving groove; 3.1 first tube pin; 3.2 second tube pin; 3.3 balloon body;

[0029] 4.1 The cylindrical part of the head end tube; 4.2 The frustum-shaped part of the head end tube;

[0030] 5.1 first annular step portion; 5.2 first annular groove; 5.3 first limiting groove;

[0031] 6.1 second annular step portion; 6.2 second annular groove; 6.3 second limiting groove;

[0032] 7.1 first annular portion; 7.1.1 first stopper; 7.2 second annular portion; 7.2.1 second stopper; 7.2.2 second insertion hole; 7.2.3 annular receiving groove; 7.2.4 notch;

[0033] 8.1 First plug board; 8.2 Second plug board; 8.3 Connecting board.

[0034] As shown in the figure, an intracranial balloon dilatation catheter includes an inner tube 2, an outer tube 1, a head end tube, a transition unit and a balloon unit, wherein the inner tube 2 is located inside the outer tube 1, and the transition unit is located between the head end tube and the inner tube 2. The balloon unit includes a balloon body 3.3, a first pin 3.1 connected to the balloon body 3.3, and a second pin 3.2 connected to the balloon body 3.3, wherein the first pin 3.1 is fixed to the ends of the head end tube and the inner tube 2 by laser welding, and the second pin 3.2 is fixed to the end of the outer tube 1 by laser welding. The head end tube includes a cylindrical part 4.1 and a frustum-shaped part 4.2 connected to the cylindrical part 4.1, the cylindrical part 4.1 has a first annular step portion 5.1, the first annular step portion 5.1 has a first annular groove 5.2, the first annular groove 5.2 has a plurality of first limiting grooves 5.3 distributed in an annular manner with equal spacing, the end of the inner tube 2 has a second annular step portion 6.1, the second annular step portion 6.1 has a second annular groove 6.2, the second annular groove 6.2 has a plurality of second limiting grooves 6.3 distributed in an annular manner with equal spacing; the transition unit includes a first developing ring, a second developing ring and a plurality of transition plates located between the first developing ring and the second developing ring, the transition plate includes a first plug plate 8.1, a second plug plate 8.2 and a connecting plate 8.3 connecting the first plug plate 8.1 and the second plug plate 8.2, the first developing ring includes a first annular portion 7.1 and a plurality of first limiting grooves 5.3 located on the inner side of the first annular portion 7.1 and distributed in an annular manner with equal spacing, which cooperate with the first limiting groove 5.3 Block 7.1.1, the second developing ring includes a second annular portion 7.2 and a plurality of second limiting blocks 7.2.1 located on the inner side of the second annular portion 7.2 and distributed in an annular manner with equal spacing and cooperating with the second limiting groove 6.3, the first developing ring has a plurality of first plug holes distributed in an annular manner with equal spacing, the first plug plate 8.1 can be inserted into the first plug holes, the second developing ring has a plurality of second plug holes distributed in an annular manner with equal spacing, the second plug plate 8.2 can be inserted into the second plug holes 7.2.2; the first tube pin 3.1 surrounds the first annular step portion 5.1, the first annular groove 5.2, the transition unit, the second annular groove 6.2 and the second annular step portion 6.1, the end of the first tube pin 3.1 away from the balloon body 3.3 is located at the first annular step portion 5.1 and is fixed to the first annular step portion 5.1 by laser welding, and the end of the first tube pin 3.1 close to the balloon body 3.3 is located at the second annular step portion 6.1 and is fixed to the second annular step portion 6.1 by laser welding.

[0035] The outer diameter of the first pin 3.1 is equal to the outer diameter of the cylindrical part 4.1 of the head end tube, and the outer diameter of the first pin 3.1 is equal to the outer diameter of the inner tube 2. The end of the frustum-shaped part 4.2 of the head end tube has an arc chamfer. The number of the first limit groove 5.3, the first limit block, the second limit groove 6.3 and the second limit block are six, and the number of transition plates at the transition unit is between 2 and 6. The first developing ring and the second developing ring are both made of stainless steel. The cross-sections of the first plug plate 8.1, the second plug plate 8.2 and the connecting plate 8.3 are all arc-shaped. The outer side of the second developing ring is provided with an annular accommodating groove 7.2.3 and a notch 7.2.4 connected to the annular accommodating groove 7.2.3, and the outer side of the inner tube 2 is provided with a strip accommodating groove 2.1, which extends to the second annular step portion 6.1 and is connected to the notch 7.2.4; a pressure sensor is installed at the end of at least one second jack 7.2.2, and the wire of the pressure sensor passes through the annular accommodating groove 7.2.3, the notch 7.2.4 and the strip accommodating groove 2.1.

[0036] The balloon catheter of the present application is shown in the figure, the first pin of the balloon unit surrounds the end of the terminal tube, the end of the transition unit and the inner tube, and one end of the first pin is welded and fixed to the first annular step portion of the terminal tube, and the other end is welded and fixed to the second annular step portion, and the outer diameter of the first pin is equal to the outer diameter of the cylindrical part of the head end tube, and the outer diameter of the first pin is equal to the outer diameter of the inner tube, so that the terminal tube, the inner tube and the first pin of the balloon unit have better flatness, so that the head end tube of the balloon catheter has better passability and can reduce stimulation to human blood vessels.

[0037] And during manufacturing, according to the different specifications of the balloon catheter, by selecting the number of transition plates, the flexibility of the bending of the terminal tube can be adjusted. When a higher flexibility is required, a smaller number of transition plates can be selected, and when a lower flexibility is required, a larger number of transition plates can be selected. Thus, balloon catheters with different flexibility can be produced based on the same set of parts. The transition unit is assembled and pressed between the head end tube and the inner tube, and the first tube pin is used to surround the corresponding components and fixed at the corresponding position by laser welding. And at least one of the ends of the second jack is installed with a pressure sensor, so that when the head end tube encounters resistance, when the head end tube and the inner wall of the human blood vessel are abnormally pressed during operation, the corresponding second plug plate will press the pressure sensor, so that the pressure sensor can sense it, thereby prompting the operator to avoid the head end tube from causing damage to the blood vessel. In addition, the transition unit itself has a flexibility adjustment function, and the transition unit itself has the function of a developing ring, so that the two developing rings can help the operator well, and the transition unit combines the flexibility adjustment function and the developing function well.

[0038] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be appreciated by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. An intracranial balloon dilatation catheter, characterized in that: It includes an inner tube, an outer tube, a head end tube, a transition unit and a balloon unit, the inner tube is located inside the outer tube, the transition unit is located between the head end tube and the inner tube, the balloon unit includes a balloon body, a first tube pin connected to the balloon body and a second tube pin connected to the balloon body, the first tube pin is fixed to the ends of the head end tube and the inner tube by laser welding, and the second tube pin is fixed to the end of the outer tube by laser welding.

2. The intracranial balloon dilatation catheter according to claim 1, characterized in that: The head end tube includes a cylindrical part and a frustum-shaped part connected to the cylindrical part, the cylindrical part has a first annular step portion, the first annular step portion has a first annular groove, the first annular groove has a plurality of first limiting grooves distributed in an annular manner with equal spacing, the end of the inner tube has a second annular step portion, the second annular step portion has a second annular groove, the second annular groove has a plurality of second limiting grooves distributed in an annular manner with equal spacing; the transition unit includes a first developing ring, a second developing ring and a plurality of transition plates located between the first developing ring and the second developing ring, the transition plate includes a first plug plate, a second plug plate and a connecting plate connecting the first plug plate and the second plug plate, the first developing ring includes a first circular portion and a plurality of first limiting grooves located on the inner side of the first circular portion and distributed in an annular manner with equal spacing, which cooperate with the first limiting groove The second developing ring includes a second annular portion and a plurality of second limiting blocks located on the inner side of the second annular portion and distributed in an annular manner with equal spacing and cooperating with the second limiting groove; the first developing ring has a plurality of first plug holes distributed in an annular manner with equal spacing, and the first plug plate can be inserted into the first plug hole; the second developing ring has a plurality of second plug holes distributed in an annular manner with equal spacing, and the second plug plate can be inserted into the second plug hole; the first tube pin surrounds the first annular step portion, the first annular groove, the transition unit, the second annular groove and the second annular step portion, the end of the first tube pin away from the balloon body is located at the first annular step portion and is fixed to the first annular step portion by laser welding, and the end of the first tube pin close to the balloon body is located at the second annular step portion and is fixed to the second annular step portion by laser welding.

3. The intracranial balloon dilatation catheter according to claim 2, characterized in that: The number of the first limiting grooves, the first limiting blocks, the second limiting grooves and the second limiting blocks are all six, and the number of transition plates at the transition unit is between 2 and 6.

4. The intracranial balloon dilatation catheter according to claim 2, characterized in that: The first developing ring and the second developing ring are both made of stainless steel.

5. The intracranial balloon dilatation catheter according to claim 2, characterized in that: The cross sections of the first plug board, the second plug board and the connecting plate are all arc-shaped.

6. The intracranial balloon dilatation catheter according to claim 2, characterized in that: The outer side of the second developing ring has an annular accommodating groove and a notch connected to the annular accommodating groove, and the outer side of the inner tube has a strip accommodating groove, which extends to the second annular step portion and is connected to the notch; a pressure sensor is installed at the end of at least one second jack, and the wire of the pressure sensor passes through the annular accommodating groove, the notch and the strip accommodating groove.

7. The intracranial balloon dilatation catheter according to claim 2, characterized in that: The outer diameter of the first pin is equal to the outer diameter of the cylindrical portion of the head end tube, and the outer diameter of the first pin is equal to the outer diameter of the inner tube.

8. The intracranial balloon dilatation catheter according to claim 2, characterized in that: The end of the frustoconical portion of the head end tube has an arc-shaped chamfer.

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