Balloon catheter assembly for combined local anesthesia and balloon dilatation

Abstract

The utility model relates to a balloon catheter assembly for jointly carrying out local anesthesia and balloon dilatation, which comprises a balloon catheter and a guide wire, the balloon catheter comprises a handle, a balloon dilatation catheter, a balloon dilatation catheter and a balloon dilatation catheter, the handle is provided with a cavity, a discharge port, a main channel and a secondary channel, and the discharge port, the main channel and the secondary channel are communicated with the cavity; the balloon is arranged at one end, far away from the handle, of the balloon catheter; one end of the inner core catheter is communicated with the main channel in the cavity of the handle, the other end of the inner core catheter extends from the cavity of the handle, penetrates through the discharge port and reaches an inner core catheter outlet of the inner core catheter, and the inner core catheter outlet is communicated with the interior of the balloon; and an outer core catheter disposed outside of the inner core catheter and having one end in communication with the secondary passage in the cavity of the handle and the other end extending from the cavity of the handle through the discharge port to an outer core catheter outlet of the outer core catheter, the outer core catheter outlet communicating with the outside of the balloon catheter, and wherein the outer core catheter is disposed outside of the balloon catheter. The diameter of the guide wire is smaller than the inner diameter of the inner core catheter of the balloon catheter, so that the guide wire can be introduced into the inner core catheter.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a balloon catheter assembly used for combining local anesthesia (ie, local anesthesia) and balloon dilatation to implement a trigeminal ganglion balloon compression method. Background Art

[0002] The trigeminal ganglion balloon compression method is a minimally invasive surgery used to treat trigeminal neuralgia. The key point of this method is to insert the balloon into the trigeminal ganglion and then use the expansion of the balloon to compress the trigeminal nerve to achieve the purpose of treatment.

[0003] Specifically, in the prior art, a puncture needle is first used to establish a percutaneous channel to the trigeminal nerve semilunar node, and then an injection device is introduced through the channel to inject an anesthetic to achieve local anesthesia, and then the injection device is removed, and then a balloon is introduced through the channel to the trigeminal nerve semilunar node, and finally the balloon is inflated to compress the nerve for about 2 to 3 minutes to achieve pain treatment. This operation method requires multiple introduction and removal of equipment, and the local anesthesia and balloon expansion operations are performed in batches, so it is time-consuming and cumbersome to operate.

[0004] In addition, since the channel established by the rigid puncture needle is difficult to directly reach the location of the trigeminal node, the balloon assembly needs to be made flexible and bendable so that after passing through the channel established by the puncture needle, it can be further bent and extended to finally reach the location of the trigeminal node. However, the flexible balloon assembly is easily bent and damaged during storage and transportation, and it is also difficult to move forward when introduced into the channel established by the puncture needle. Utility Model Content

[0005] The purpose of the utility model is to provide a balloon catheter assembly for combined local anesthesia and balloon dilation, which is easy to introduce and can achieve local anesthesia and balloon dilation in one introduction, that is, it can jointly perform local anesthesia and balloon dilation operations, thereby improving surgical efficiency and simplifying surgical operations.

[0006] The balloon catheter assembly for combined local anesthesia and balloon dilatation according to the utility model comprises a balloon catheter and a guide wire, wherein the balloon catheter comprises: a handle, the handle is provided with a cavity and an outlet, a main channel and a secondary channel connected to the cavity; a balloon, the balloon is arranged at one end of the balloon catheter away from the handle; an inner core catheter, one end of the inner core catheter is connected to the main channel in the cavity of the handle, and the other end of the inner core catheter extends from the cavity of the handle through the outlet to the inner core catheter An outlet, the inner core catheter outlet is connected to the interior of the balloon; and an outer core catheter, the outer core catheter is arranged around the inner core catheter on the outside of the inner core catheter, and one end of the outer core catheter is connected to the secondary channel in the cavity of the handle, the other end of the outer core catheter extends from the cavity of the handle through the discharge outlet to reach the outer core catheter outlet of the outer core catheter, the outer core catheter outlet is connected to the outside of the balloon catheter, and wherein the diameter of at least a portion of the guide wire is smaller than the inner diameter of the inner core catheter of the balloon catheter.

[0007] On the one hand, since the inner core catheter establishes a channel from the main channel to the inside of the balloon, and the outer core catheter establishes a channel from the secondary channel to the outside at the distal end of the balloon catheter, when the balloon catheter is introduced into the surgical site through the channel established by the puncture needle, the contrast agent can be introduced into the balloon through the channel established by the inner core catheter, and the anesthetic can be introduced into the surgical site through the channel established by the outer core catheter, thereby achieving local anesthesia and balloon inflation in one introduction.

[0008] On the other hand, since the diameter of at least a portion of the guide wire is smaller than the inner diameter of the inner core catheter, this portion can be introduced into the inner core catheter to enhance the rigidity of the inner core catheter and even the entire balloon catheter to avoid damage due to bending during transportation and storage. At the same time, during surgery, the balloon catheter assembly consisting of the balloon catheter and the guide wire can be easily inserted into the puncture needle. After the balloon catheter reaches the other end of the puncture needle, the distal portion or all of the guide wire is removed to allow the distal balloon catheter to reach the surgical site by bending.

[0009] Preferably, the extension length of the outer core catheter is less than the extension length of the inner core catheter, the distal end of the inner core catheter is farther than the distal end of the outer core catheter, and the proximal end of the inner core catheter is closer than the proximal end of the outer core catheter. In the present application, "near" means the direction toward the handle, and "far" means the way away from the handle. Accordingly, "proximal end" means the end close to the handle, and "distal end" means the end away from the handle.

[0010] Here, by arranging the distal end of the inner core catheter farther than the distal end of the outer core catheter, a section is formed at the distal end of the inner core catheter where no outer core catheter is arranged, so that the balloon can be arranged on the section and the inner core catheter outlet can be opened on the section.

[0011] Preferably, the outer core catheter outlet is arranged at the proximal end of the balloon and is 10-20 mm away from the farthest port of the inner core catheter. The catheter usually includes a catheter wall and a fluid passage formed by the catheter wall, and the two ends of the fluid passage are the two ports of the catheter. The "farthest port" referred to in this application is the port of the catheter away from the handle. The outer core catheter outlet is arranged at this distance position, which can ensure that sufficient sections for arranging the balloon are formed on the inner core catheter, and can also ensure that the anesthetic flowing into the body through the outer core catheter outlet can reach the effective part, thereby ensuring the effect of local anesthesia.

[0012] Preferably, the balloon catheter also includes a first seal and a second seal, wherein the first seal seals the farthest port of the inner core catheter, and the second seal seals the farthest port of the outer core catheter. More preferably, the first seal has a ball head and a centrally located rod-shaped portion, wherein the rod-shaped portion is inserted into the inner core catheter, and the second seal is configured as an annular shape, and the second seal is inserted between the outer core catheter and the inner core catheter. In this case, the two ends of the balloon can be respectively sealed by crimping with a retaining ring as a base with the first seal and the second seal. Preferably, the first seal, the second seal and / or the retaining ring are made of metal. The first seal, the second seal and / or the retaining ring made of metal can indicate the farthest port of the inner core catheter and the outer core catheter and the position of the balloon in the process of introducing the balloon catheter.

[0013] Preferably, the extension direction of the main channel is different from the extension direction of the inner core catheter. In this way, a bend will be formed at the connection between the main channel and the inner core catheter. In this case, the guide wire may include a flexible section that can extend in the inner core catheter and a rigid section that can extend in the main channel, and the rigidity of the flexible section is less than the rigidity of the rigid section but greater than the rigidity of the balloon catheter. In this way, the flexible section can enter the inner core pipeline by bending until the rigid section arrives at the connection between the main channel and the inner core catheter. This design can prevent the rigid guide wire from causing damage to the inner core catheter on the one hand, and can also accurately control the length of the flexible section extending into the main channel on the other hand.

[0014] Furthermore, by designing the length of the flexible section to be less than or equal to the length of the inner core conduit, it is possible to prevent the flexible section from being too long and pressing against the inner core conduit, thereby causing the flexible section to bend inside the inner core conduit, thereby deforming the inner core conduit. In addition, the length of the rigid section can also be designed to be greater than the length of the main channel, so as to provide a grip for the operator to operate.

[0015] In one embodiment, the flexible section is made of tungsten wire and the rigid section is made of steel.

[0016] In another embodiment, the guide wire may be made entirely of tungsten wire, but the diameter of the rigid section is larger than the diameter of the flexible section, so that the guide wire has different rigidities in the two sections.

[0017] In yet another embodiment, the main channel and the inner core catheter are arranged on the same straight line, and the guide wire has a uniform diameter and material and can extend through the main channel and the inner core catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the preferred embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0019] Figure 1 A front view of a balloon catheter assembly for combined local anesthesia and balloon dilation according to the utility model is shown;

[0020] Figure 2 Shows Figure 1 An enlarged cross-sectional view of a handle portion of a balloon catheter of the balloon catheter assembly shown; and

[0021] Figure 3 Shows Figure 1 An enlarged cross-sectional view of the balloon portion of the balloon catheter of the balloon catheter assembly is shown. DETAILED DESCRIPTION

[0022] Now, with reference to the accompanying drawings, the specific embodiments of the present invention are described in detail. What is described here is only the preferred embodiment of the present invention. Those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and the other ways also fall within the scope of the present invention.

[0023] Figure 1The balloon catheter assembly 1 for combined local anesthesia and balloon dilatation according to the utility model is shown, and the balloon catheter assembly 1 includes a balloon catheter 100 and a guide wire 200. The guide wire includes a flexible section 210 that is fully inserted into the balloon catheter 100 and a rigid section 220 that is partially inserted into the balloon catheter 100 and partially exposed for easy operation. In this case, the rigidity of the flexible section 210 is less than the rigidity of the rigid section 220 but greater than the rigidity of the balloon catheter 100. This can be achieved by using different materials to make the guide wire 200, for example, the flexible section 210 can be made of tungsten wire, and the rigid section 220 is made of steel. Alternatively, this can also be achieved by using materials of different diameters to make the guide wire 200, for example, the flexible section 210 can be made of 0.5mm tungsten wire, and the rigid section 220 is made of 1.5mm tungsten wire.

[0024] In other embodiments, the guidewire 200 may also be made flexible or rigid throughout its entire length.

[0025] like Figure 1 As shown, the balloon catheter 100 includes a handle 110 , which is provided with a cavity 112 , and an outlet 114 , a main channel 116 , and a secondary channel 118 communicating with the cavity 112 .

[0026] The balloon catheter 100 further includes an inner core catheter 120, an outer core catheter 130, and a balloon 160 disposed at the distal end of the inner core catheter 120. The inner core catheter 120 and the outer core catheter 130 are preferably flexible catheters, which can enter the human body through the channel established by the puncture needle, and further reach the part that the rigid catheter cannot reach through its own bending, which is beneficial for accurately performing anesthesia administration and balloon dilatation treatment.

[0027] In this case, the handle 110 of the balloon catheter 100 is hard, which can ensure that the parts of the inner core catheter 120 and the outer core catheter 130 inside the handle 110 will not be bent. However, the parts of the inner core catheter 120 and the outer core catheter 130 extending beyond the discharge port 114 of the handle 110 are easily bent, which is disadvantageous during transportation, storage and passing through the puncture needle.

[0028] The inner core catheter 120 and the outer core catheter 130 are constructed as independent catheters, respectively including a catheter wall and a fluid passage formed by the catheter wall, the two ends of the fluid passage are the two ports of the catheter, wherein the farthest port refers to the port of the catheter away from the handle 110.

[0029] One end of the inner core catheter 120 is arranged in the cavity 112 of the handle 110 to be connected to the main channel 116, and the inner core catheter 120 is configured to extend from the cavity 112 through the exhaust port 114 to reach an inner core catheter outlet 122 provided on the catheter wall at the distal end of the inner core catheter 120, and the inner core catheter outlet 122 connects the interior of the inner core catheter 120 with the interior of the balloon 160, so that the first fluid can flow into the interior of the balloon 160 through the inner core catheter outlet 122 to expand the balloon 160.

[0030] Here, the first fluid is preferably a contrast agent. The contrast agent is introduced into the balloon catheter 100 through the main channel 116, and then enters the interior of the balloon 160 through the inner core catheter 120 to expand the balloon 160 for the purpose of treatment. At the same time, by using the contrast agent to expand the balloon 160, the operator can obtain an image of the balloon in the human body from the outside, thereby accurately controlling the size of the balloon 160 to achieve the desired treatment effect. The first fluid can also be other liquids or gases, such as water or air.

[0031] The outer core catheter 130 is arranged around the inner core catheter 120 on the outside of the inner core catheter 120, and is particularly arranged concentrically. One end of the outer core catheter 130 is arranged in the cavity 112 of the handle 110 to communicate with the secondary channel 118, and the outer core catheter 130 is configured to extend from the cavity 112 through the discharge port 114 to reach the outer core catheter outlet 132 provided on the catheter wall of the outer core catheter 130 at its distal end, and the outer core catheter outlet 132 communicates the interior of the outer core catheter 130 with the exterior of the balloon catheter 100, so that the second fluid can flow out of the balloon catheter 100 through the outer core catheter outlet 132.

[0032] Here, the second fluid is an anesthetic agent, which is introduced into the balloon catheter 100 through the secondary channel 118, then passes through the outer core catheter 130 to reach the distal end of the balloon catheter 100, and flows out of the balloon catheter 100 to reach the site to be anesthetized.

[0033] The distance between the outer core catheter outlet 132 and the farthest port of the inner core catheter 120 can be 10-20mm, more preferably 10-15mm. This distance is conducive to providing the position of arranging sacculus 160 at the far end of the inner core catheter 120, and can ensure that anesthetic can reach the part to be anesthetized. In addition, the extension length of the outer core catheter 130 can also be advantageously arranged to be less than the extension length of the inner core catheter 120, and the far end of the inner core catheter 120 is further away than the far end of the outer core catheter 130 to provide the position of arranging sacculus 160, and the near end of the inner core catheter 120 is closer than the near end of the outer core catheter 130 to meet the connection requirements.

[0034] Due to the limitation of the surgical site, the inner diameter of the inner core catheter 120 can be generally set to 0.5mm to 1mm, preferably to 0.8mm, the inner diameter of the outer core catheter 130 can be set to 1mm to 2mm, preferably to 1.5mm, and the diameter of the flexible section 210 of the guide wire can be set to 0.3mm to 0.6mm, preferably to 0.5mm. In short, the diameter of the flexible section 210 of the guide wire 200 should be smaller than the inner diameter of the inner core catheter 120, so that the flexible section 210 of the guide wire 200 can be introduced into the inner cavity of the inner core catheter 120.

[0035] Introducing the guide wire 200 into the inner core catheter 120 can enhance the overall rigidity of the balloon catheter 100, so that the balloon catheter 100 is not easily bent and damaged during transportation and storage. In addition, the balloon catheter 100 with increased rigidity is also easier to pass through the puncture needle and reach the other end of the puncture needle. When the distal end of the balloon catheter 100 passes through the puncture needle, the rigidity at the distal end of the balloon catheter 100 can be reduced by partially withdrawing the guide wire 200 from the inner core catheter 120, so that the distal end of the balloon catheter 100 can be bent to reach the surgical site.

[0036] Figure 2 The interior of the handle 112 is further shown. Figure 2 It can be clearly seen that the extension direction of the main channel 116 is different from the extension direction of the inner core catheter 120, so that the guide wire 200 is bent at the connection between the main channel 116 and the inner core catheter 120. This bending can easily occur on the flexible section 210 of the guide wire 200. After the flexible section 210 is completely sent into the inner core catheter 120, the rigid section 220 of the guide wire 200 cannot continue to be sent into the inner core catheter 120, so that the length of the guide wire sent into the inner core catheter 120 can be easily confirmed, that is, the maximum length of the flexible section 210. In this case, the length of the flexible section 210 is designed to be equal to or slightly less than the length of the inner core catheter 120, so that when the guide wire 200 is sent into the inner core catheter 120 through the main channel 116, once it encounters a situation where it cannot be sent in, it can be considered that the flexible section 210 of the guide wire 200 has been extended over the substantially entire length of the inner core catheter 120 and does not bend. This is very beneficial to the convenience of operation.

[0037] In addition, the length of the rigid section 220 is greater than the length of the main channel 116 so that after the flexible section 210 is completely delivered into the inner core catheter 120, part of the rigid section 220 remains outside the main channel 116 for operation.

[0038] In other embodiments, the main channel 116 can also be arranged in the same straight line as the inner core catheter 120. In this case, the guide wire 200 can be configured to be uniform in diameter and material, which is particularly convenient in manufacturing. For example, a guide wire with uniform diameter and material can be selected to support and guide the balloon catheter 100 by extending the guide wire through the main channel 116 and the inner core catheter 120 of the balloon catheter 100 in the same straight line.

[0039] Figure 3 An enlarged view of the portion where the balloon 160 is located is shown. Figure 3 The balloon 160 has a cylindrical structure in an unexpanded state, and its two ends are crimped and sealed by a fixing ring 190, which is particularly made of metal. The two ends of the balloon 160 can also be connected to the inner core catheter 120 in other ways, such as by bonding.

[0040] The inner core catheter 120 is provided with a first seal 170 for sealing the farthest port at its farthest port. The first seal 170 is preferably made of metal and has a hemispherical ball head 172 and a rod-shaped portion 174 extending outward from the bottom center of the hemispherical ball head 172. The rod-shaped portion 174 is suitable for being arranged in the center of the ball head 172 to facilitate balanced guidance of the balloon catheter 100. The rod-shaped portion 174 is also suitable for being inserted into the inner core catheter 120 and forming an interference fit with the catheter wall of the inner core catheter 120. Here, the farthest end of the flexible section 210 of the guide wire basically touches the bottom end of the rod-shaped portion 174, so that the flexible section 210 can increase the rigidity of the balloon catheter 100 over the entire length as much as possible.

[0041] Meanwhile, the outer core conduit 130 is provided with a second seal 180 for sealing the farthest port at its farthest port. The second seal 180 is made of metal and is configured in an annular shape. The second seal 180 is suitable for being inserted between the outer core conduit 130 and the inner core conduit 120 and forming an interference fit therein.

[0042] Since the inner core conduit 120 and the outer core conduit 130 are flexible conduits, the first seal 170 and the second seal 180 made of metal also provide a hard base for the crimping seal of the fixing ring 190. In addition, the rod-shaped portion 174 of the first seal 170 and the inner core conduit 120 and the second seal 180 and the conduit walls of the outer core conduit 130 and the inner core conduit 120 do not need to meet the interference fit requirement in terms of size, because when the fixing ring 190 performs crimping seals on the first seal 170 and the second seal 180, it will also seal the farthest ports of the corresponding conduits accordingly.

[0043] The above description of various embodiments of the present invention is provided to a person of ordinary skill in the relevant art for the purpose of description. It is not intended to exclude or limit the present invention to a single disclosed embodiment. As above, a person of ordinary skill in the art will understand the various substitutions and variations of the present invention. Therefore, although some alternative embodiments are specifically described, a person of ordinary skill in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all substitutions, modifications and variations of the present invention described herein, as well as other embodiments that fall within the spirit and scope of the present invention described above.

[0044] Reference numerals list

[0045] 1 Balloon Catheter Assembly

[0046] 100 Balloon Catheter

[0047] 110 Handle

[0048] 112 Lumen

[0049] 114 Exhaust

[0050] 116 Main Channel

[0051] 118 Secondary Channel

[0052] 120 Core Catheter

[0053] 122 Inner core catheter outlet

[0054] 130 Outer core catheter

[0055] 132 Outer core conduit outlet

[0056] 160 Balloon

[0057] 170 First seal

[0058] 172 Ball Head

[0059] 174 Rod

[0060] 180 Second seal

[0061] 190 Fixing ring

[0062] 200 Guide Wire

[0063] 210 Flexible section

[0064] 220 Rigid section

Claims

1. A balloon catheter assembly for combined local anesthesia and balloon dilatation, characterized in that: The balloon catheter assembly comprises a balloon catheter and a guide wire, wherein the balloon catheter comprises: A handle, wherein the handle is provided with a cavity and a discharge port, a main channel and a secondary channel communicated with the cavity; A balloon, the balloon being arranged at an end of the balloon catheter away from the handle; an inner core catheter, one end of which is in communication with the main channel in the cavity of the handle, and the other end of which extends from the cavity of the handle through the discharge port to an inner core catheter outlet of the inner core catheter, wherein the inner core catheter outlet is in communication with the interior of the balloon; and an outer core catheter, wherein the outer core catheter is arranged around the inner core catheter on the outside of the inner core catheter, and one end of the outer core catheter is communicated with the secondary channel in the cavity of the handle, and the other end of the outer core catheter extends from the cavity of the handle through the discharge port to the outer core catheter outlet of the outer core catheter, and the outer core catheter outlet is communicated with the outside of the balloon catheter, And wherein, the diameter of at least a portion of the guide wire is smaller than the inner diameter of the inner core catheter of the balloon catheter, so that the guide wire can be introduced into the inner core catheter.

2. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to claim 1, characterized in that: The extension length of the outer core catheter is shorter than that of the inner core catheter, the distal end of the inner core catheter is farther than the distal end of the outer core catheter, and the proximal end of the inner core catheter is closer than the proximal end of the outer core catheter.

3. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to claim 1, characterized in that: The outlet of the outer core catheter is arranged at the proximal end of the balloon and is 10-20 mm away from the farthest port of the inner core catheter.

4. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to any one of claims 1 to 3, characterized in that: The balloon catheter further includes a first seal that seals the distal-most port of the inner core catheter and a second seal that seals the distal-most port of the outer core catheter.

5. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to claim 4, characterized in that: The first seal has a ball head and a rod-shaped portion located in the center, the rod-shaped portion is inserted into the inner core catheter, and the second seal is configured in a ring shape, the second seal is inserted between the outer core catheter and the inner core catheter.

6. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to claim 4, characterized in that: The two ends of the balloon are respectively sealed by crimping through a fixing ring with the first sealing member and the second sealing member as a base.

7. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to claim 6, characterized in that: The first sealing member, the second sealing member and / or the fixing ring are made of metal.

8. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to claim 1, characterized in that: An extending direction of the main channel is different from an extending direction of the inner core catheter.

9. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to claim 8, characterized in that: The guidewire includes a flexible section capable of extending in the inner core catheter and a rigid section capable of extending in the main channel, wherein the rigidity of the flexible section is less than that of the rigid section but greater than that of the balloon catheter.

10. The balloon catheter assembly for combined local anesthesia and balloon dilation according to claim 9, characterized in that: The length of the flexible section is less than or equal to the length of the inner core catheter, and the length of the rigid section is greater than the length of the main channel.

11. The balloon catheter assembly for combined local anesthesia and balloon dilation according to claim 9, characterized in that: The flexible section is made of tungsten wire, and the rigid section is made of steel.

12. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to claim 9, characterized in that: The guide wire is made of tungsten wire, and the diameter of the rigid section is larger than the diameter of the flexible section.

13. The balloon catheter assembly for combined local anesthesia and balloon dilatation according to claim 1, characterized in that: The main channel and the inner core catheter are arranged on the same straight line, and the guide wire has a uniform diameter and material and can extend through the main channel and the inner core catheter.

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