Balloon catheter for trifurcate micro-balloon compression surgery

Abstract

The utility model relates to the field of medical instruments, in particular to a balloon catheter for trifurcate microballoon compression surgery, which comprises a catheter body and a balloon arranged outside the head end of the catheter body, two conveying chambers are formed in the catheter body through a separator, and the conveying chambers are respectively and correspondingly communicated with a bifurcate joint at the tail end of the catheter body. The conveying chamber comprises a radiography chamber and a liquid suction chamber, and the radiography chamber and the liquid suction chamber are not communicated with each other. A liquid suction hole is formed in the head end of the liquid suction cavity, a plurality of supporting protrusions are arranged at the position, away from the balloon section, of the inner side of the tail end of the liquid suction cavity, and the four sets of supporting protrusions are symmetrically arranged in the radial direction of the inner side of the liquid suction cavity and distributed at equal intervals in the axial direction of the liquid suction cavity. By means of the double-cavity balloon catheter, the synchronous surgery process of balloon filling and cerebrospinal fluid extraction in radiography is achieved, and the technical problems of pollution and mutual influence caused by re-puncture and implementation of the two processes in the same channel are solved. The structure is reasonable in design, convenient to operate and high in practicability.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a balloon catheter for trifurcated microballoon compression surgery. Background Art

[0002] The trigeminal nerve is the fifth cranial nerve that each of us has, which controls the sensation and partial movement of the head and face. The so-called trigeminal neuralgia (TN) refers to repeated episodes of short-term severe pain in the distribution area of ​​the trigeminal nerve, which is like electric shock, knife cutting, and tearing. The pain comes and goes suddenly, and each time it lasts for a few seconds to tens of seconds. Facial movements or touches such as talking, eating, brushing teeth, and washing the face may induce unbearable pain at any time. Trigeminal neuralgia is often divided into primary trigeminal neuralgia (the specific pathogenic mechanism is unknown) and secondary trigeminal neuralgia (secondary pain caused by primary diseases such as tumors and herpes zoster).

[0003] Percutaneous trigeminal nerve microballoon compression (PBC) is the latest minimally invasive interventional treatment. PBC technology is to puncture the skin to the foramen ovale with a special trocar, insert the balloon catheter (Fogarty catheter) through the trocar, make the balloon at the front end of the catheter reach the Meckel cavity (the location of the trigeminal nerve semilunar node), inject contrast agent into the catheter, make the balloon at the tip of the catheter fill in the Meckel cavity, compress the trigeminal ganglion, destroy the nerve pain transmission function, and retain the motor function of the nerve root to the maximum extent, so as to effectively relieve the pain symptoms without affecting the chewing ability as much as possible.

[0004] After searching, the Chinese patent application with application number 202020835212.2 discloses a balloon catheter and a trigeminal nerve compression device, wherein the balloon catheter includes a tube body, provided with a channel and an injection port and a liquid outlet connected to the channel; a balloon, which is sleeved on the tube body and covers the liquid outlet, and the balloon has elastic deformation performance; a deformation component, which is accommodated in the channel, and one end of the deformation component close to the liquid outlet has deformation performance. The direction of the balloon can be adjusted by adjusting the bending direction of the deformation component, so that the balloon passing through the puncture needle sheath passes through the oval foramen in a predetermined direction to reach the Meckel's cavity, without removing the puncture needle sheath and re-puncturing, and the user experience is good.

[0005] The above-mentioned balloon catheter and trigeminal nerve compression device are provided with a deformable component, a first buckle and a second buckle and other structures at the position where the balloon is set in the balloon catheter, which will affect the observation of the expanded shape of the angiographic balloon, causing the doctor to be unable to accurately judge whether the balloon is filled into the shape required for examining the disease. Summary of the invention

[0006] The technical problem that other structural components are provided at the catheter balloon position in the above-mentioned prior art makes it impossible for doctors to accurately observe and judge the expanded shape of the angiography balloon.

[0007] Technical idea: This application provides a new type of balloon catheter for trifurcated microballoon compression surgery. Starting from the problems of the existing technology, a double-lumen catheter is provided to realize the aspiration of cerebrospinal fluid during the process of balloon angiography expansion and compression. Through separate channels, the two channels do not affect each other during the operation, avoiding technical problems such as surgical infection caused by repeated punctures, difficulty in obtaining cerebrospinal fluid, and excessively long operation time.

[0008] To achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A balloon catheter for trifurcated microballoon compression surgery comprises a catheter body and a balloon arranged outside the catheter body head end, wherein two delivery chambers are formed inside the catheter body through a separator, and the delivery chambers are respectively connected to bifurcated joints at the tail end of the catheter body.

[0010] Specifically, the isolation piece is an arc-shaped isolation tube wall, and an elliptical chamber is formed between the arc-shaped isolation tube wall and a tube wall on one side of the catheter tube body.

[0011] Preferably, the tip end of the catheter body is blunt-shaped, and the catheter body is made of rubber or silicone material.

[0012] In the above technical solution, the balloon is sleeved on the outside of the catheter body, and the catheter body is provided with at least one liquid outlet hole connecting the catheter body lumen and the balloon inner lumen on the tube section where the balloon is located.

[0013] In detail, the balloon has elastic deformation properties, and is placed in the anatomical area of ​​the trigeminal nerve. By injecting contrast agent into the balloon, the balloon is filled into a pear shape to compress the trigeminal ganglion.

[0014] Furthermore, the transport chamber includes an imaging chamber and a liquid aspiration chamber, and the imaging chamber and the liquid aspiration chamber are not communicated with each other.

[0015] In the above technical solution, a liquid suction hole is provided at the head end of the liquid suction chamber, and a plurality of supporting protrusions are provided on the inner side of the tail end away from the balloon section.

[0016] Specifically, the support protrusions are arranged in four groups symmetrically along the radial direction of the inner side of the liquid suction chamber and are equidistantly distributed along the axial direction of the liquid suction chamber.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model divides the inner cavity of the catheter tube into a contrast chamber and a liquid suction chamber by means of a partition. By injecting contrast agent into the contrast chamber, the contrast agent enters the balloon through the liquid outlet hole, so that the balloon is filled to achieve the technical effect of compressing the trigeminal nerve. Through the liquid suction hole at the head end of the liquid suction chamber, on the one hand, cerebrospinal fluid of the Meckel's chamber is extracted to achieve clinical examination, diagnosis or scientific research of the extracted cerebrospinal fluid, and on the other hand, it is convenient to administer medicine through a separate liquid suction chamber, which can avoid the technical problems of liquid contamination and separate puncture for administration.

[0019] The utility model has four groups of supporting protrusions which are radially symmetrical and axially equidistantly arranged on the inner side of the suction chamber. On the one hand, the spacing between the supporting protrusions can realize the bending of the catheter tube body; on the other hand, the supporting protrusions can achieve the technical effect of preventing the catheter tube body from collapsing when suctioning cerebrospinal fluid, thereby preventing the suction chamber from being blocked, thereby ensuring a smooth suction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 For this utility model Figure 1 Cross-section view in the AA direction;

[0023] Figure 3 For this utility model Figure 2 Enlarged view of part A in the middle;

[0024] Figure 4 For this utility model Figure 2 Cross-section along the middle BB direction;

[0025] Figure 5 For this utility model Figure 1 The middle part shows the left view of the balloon catheter;

[0026] Figure 6 This is a schematic diagram of the inner structure of the liquid suction chamber of the utility model;

[0027] Figure 7 It is a schematic diagram of the structure of the third part of the embodiment of the utility model;

[0028] In the figure: 1. catheter body; 2. balloon; 3. bifurcated joint; 4. spacer; 5. contrast chamber; 6. liquid outlet; 7. liquid suction chamber; 8. liquid suction hole; 9. support protrusion. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "front end", "back end", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The inventors have found that in percutaneous trigeminal nerve microballoon compression, the balloon catheter used clinically has only one channel for injecting contrast agent into the balloon to expand the balloon and compress the trigeminal nerve. However, depending on the patient, some patients need to be given medication or extract cerebrospinal fluid during surgery for sample inspection and auxiliary diagnosis or even for scientific research. At this time, it is necessary to puncture or cut the balloon and flush it before using the original contrast catheter, or directly aspirate from the tail of the puncture catheter. However, these have major disadvantages in actual implementation. For example, puncturing separately will inevitably increase the pain of the patient. Although the lumen has been cleaned by aspiration with the original catheter, it is still difficult to completely remove the contrast agent, which is likely to affect the composition of the cerebrospinal fluid and its use. Even the residual contrast agent extravasates into the Meckel's capsule, which may cause potential damage to local nerves and circulating cerebrospinal fluid. In addition, if cerebrospinal fluid is aspirated from the tail of the puncture catheter, there are disadvantages such as difficulty in obtaining, mixing of blood and cerebrospinal fluid, and excessive suction force causing damage to the nerves in Meckel's pouch and even further destruction of the pouch structure.

[0033] Based on this, the present application provides a balloon catheter for trifurcated microballoon compression surgery, comprising a catheter body 1 and a balloon 2 arranged outside the head end of the catheter body 1, wherein two delivery chambers are formed inside the catheter body 1 through an isolation piece 4, and the delivery chambers are respectively connected to the bifurcated joints 3 at the tail end of the catheter body 1. Embodiment 1

[0034] Reference Figure 1-5 As shown, the present application provides a balloon catheter for trifurcated microballoon compression surgery, comprising a catheter body 1 and a balloon 2 arranged outside the head end of the catheter body 1, wherein two delivery chambers are formed inside the catheter body 1 through an isolation piece 4, and the delivery chambers are respectively connected to the bifurcated joints 3 at the tail end of the catheter body 1.

[0035] As an example, the tail end of the catheter body 1 is connected to the bifurcated connector 3 by threads, or by integral molding.

[0036] Preferably, the tip of the catheter body 1 is blunt-shaped and is made of rubber or silicone material, which is convenient for insertion into the trigeminal nerve anatomical area to avoid damage to brain tissue and nerves.

[0037] In the above technical solution, the balloon 2 is sleeved on the outside of the catheter body 1, and the catheter body 1 is provided with at least one liquid outlet 6 connecting the lumen of the catheter body 1 with the inner lumen of the balloon 2 on the tube section where the balloon 2 is located, so as to facilitate the injection of contrast agent into the balloon 2.

[0038] It should be noted that in the initial state, the balloon 2 is in a retracted state. When the balloon reaches the anatomical area of ​​the trigeminal nerve, a contrast agent is injected into the balloon 2. The contrast agent enters the balloon through the liquid outlet 6. Since the balloon 2 has elastic deformation properties, the balloon 2 will be filled into a pear shape to compress the trigeminal ganglion.

[0039] Specifically, the isolation member 4 is an arc-shaped isolation tube wall, and an elliptical chamber is formed between the arc-shaped isolation tube wall and the tube wall on one side of the catheter tube body 1 .

[0040] Furthermore, the transport chamber includes an imaging chamber 5 and a liquid aspiration chamber 7, and the imaging chamber 5 and the liquid aspiration chamber 7 are not communicated with each other.

[0041] It should be noted that the imaging chamber 5 is an arc-shaped crescent structure, and the liquid suction chamber 7 is an elliptical structure.

[0042] In particular, a suction hole 8 is provided at the head end of the suction chamber 7, so as to facilitate the extraction and sampling of cerebrospinal fluid in the Meckel's chamber.

[0043] During the specific operation, a syringe is connected to the interface of the bifurcated joint 3 corresponding to the aspiration chamber 7 for suction, and the cerebrospinal fluid enters the aspiration chamber 7 through the aspiration hole 8, avoiding technical problems such as additional puncture or contamination of the sample through the same channel. Embodiment 2

[0044] Based on Example 1, refer to Figure 6 As shown, in order to avoid the technical problem of clogging the suction chamber 7 when aspirating cerebrospinal fluid, the utility model is provided with a plurality of supporting protrusions 9 on the inner side of the suction chamber 7 .

[0045] In the above technical solution, a plurality of supporting protrusions 9 are arranged on the inner side of the rear end of the catheter body 1 away from the balloon 2 .

[0046] Specifically, the support protrusions 9 are arranged in four groups symmetrically along the radial direction of the inner side of the liquid suction chamber 7 and are equidistantly distributed along the axial direction of the liquid suction chamber 7 .

[0047] In more detail, there is a gap between the opposing supporting protrusions 9 .

[0048] It should be noted that the purpose of such a setting is: on the one hand, the spacing between the supporting protrusions 9 can realize the bending of the catheter body 1, so that the catheter body 1 can reach the corresponding Meckel's chamber conveniently; on the other hand, the supporting protrusions 9 can achieve the technical effect of preventing the catheter body 1 from collapsing when aspirating cerebrospinal fluid, thereby preventing the aspiration chamber 7 from being blocked, thereby ensuring a smooth aspiration process.

[0049] In detail, the supporting protrusion 9 has elastic properties. Embodiment 3

[0050] Reference Figure 7 As shown, a cross-shaped structure is formed between the supporting protrusions 9.

[0051] Most preferably, the head end of the supporting protrusion 9 is an arc-shaped structure, so that each supporting protrusion 9 can be matched and docked with each other, which can provide a better supporting effect when cerebrospinal fluid is aspirated and can effectively prevent the technical problem of clogging of the aspiration chamber 7.

[0052] Specific application cases:

[0053] Taking percutaneous puncture of trigeminal ganglion microballoon compression surgery as an example, the specific application of a balloon catheter for trigeminal microballoon compression surgery in percutaneous puncture of trigeminal ganglion microballoon compression surgery is described in detail.

[0054] Trigeminal neuralgia (TN), also known as painful spasm, is a common cranial nerve disease in clinical practice. It involves the distribution area of ​​one or several trigeminal nerves, and is characterized by recurrent, paroxysmal, and severe pain. It is known as "the world's most painful pain". The pain often occurs in the patient's forehead, face, nose, mouth, etc., and often occurs when talking, eating, or washing the face. Each time it lasts for a few seconds, or tens of seconds to a few minutes, and it is repeated and severe, like a knife cut, a burn, acupuncture, electric shock, or tearing. Therefore, many patients dare not brush their teeth, wash their faces, talk, or even eat, which seriously affects their normal work and life. People also call trigeminal neuralgia "the king of pain."

[0055] In order to relieve patients' pain, based on the original craniotomy microvascular decompression (MVD), in recent years, Min Youhui, director of the Department of Neurosurgery at Zhengzhou Central Hospital, led his team to introduce a new minimally invasive technology - percutaneous trigeminal ganglion microballoon compression (PBC) to treat trigeminal neuralgia.

[0056] Percutaneous trigeminal ganglion microballoon compression (PBC) is the latest minimally invasive interventional treatment. PBC technology is to puncture the skin to the foramen ovale with a special trocar, insert the balloon catheter (Fogarty catheter) through the trocar, make the balloon at the front end of the catheter reach the Meckel cavity (the location of the trigeminal ganglion), inject contrast agent into the catheter, make the balloon at the tip of the catheter fill in the Meckel cavity, compress the trigeminal ganglion, destroy the nerve pain transmission function, and retain the motor function of the nerve root to the maximum extent, so as to effectively relieve the pain symptoms without affecting the chewing ability as much as possible.

[0057] During the specific operation, the puncture needle is inserted into the oval foramen under the monitoring of the fluorescent screen. After the puncture is completed, the puncture needle is pulled out, and then the balloon catheter is inserted into the Meckel's balloon through the puncture sheath. Then, a syringe is used to inject contrast agent into the imaging chamber 5 through the bifurcation joint 3. The contrast agent enters the balloon 2 through the liquid outlet 6, so that the balloon 2 is expanded into a pear shape, and then the filled balloon 2 is used to compress the trigeminal ganglion.

[0058] During the operation, when the cerebrospinal fluid at Meckel's pouch is needed for clinical research, the syringe is connected to the interface of the bifurcated joint 3 that passes through the aspiration chamber 7, and the cerebrospinal fluid is aspirated through the aspiration hole 8 at the head end of the aspiration chamber 7 using the syringe. The aspirated cerebrospinal fluid can be used for clinical examination, auxiliary diagnosis, and as a sample for scientific research.

[0059] After the operation, the balloon 2 is emptied, and the balloon catheter and the puncture needle are pulled out at the same time. The puncture point is compressed for five minutes and then covered with a cosmetic tape.

[0060] In summary, although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A balloon catheter for trifurcated microballoon compression surgery, comprising a catheter body (1) and a balloon (2) disposed outside the tip of the catheter body (1), characterized in that: Two transport chambers are formed inside the catheter tube body (1) through an isolating piece (4), and the transport chambers are respectively connected to the bifurcated joints (3) at the rear end of the catheter tube body (1).

2. A balloon catheter for trifurcated microballoon compression surgery according to claim 1, characterized in that: The transport chamber comprises an imaging chamber (5) and a liquid aspiration chamber (7), and the imaging chamber (5) and the liquid aspiration chamber (7) are not connected to each other.

3. A balloon catheter for trifurcated microballoon compression surgery according to claim 2, characterized in that: The head end of the liquid suction chamber (7) is provided with a liquid suction hole (8), and the inner side of the tail end away from the balloon (2) is provided with a plurality of supporting protrusions (9).

4. A balloon catheter for trifurcated microballoon compression surgery according to claim 3, characterized in that: The support protrusions (9) are arranged in four groups symmetrically along the radial direction of the inner side of the liquid suction chamber (7), and are equidistantly distributed along the axial direction of the liquid suction chamber (7).

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