CN212235585U

CN212235585U - Micro-catheter for microvascular nerve decompression

Info

Publication number: CN212235585U
Application number: CN201922165426.3U
Authority: CN
Inventors: 黃俞智
Original assignee: Taisheng Medical Co ltd
Current assignee: Taisheng Medical Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-12-29
Anticipated expiration: 2029-12-06

Abstract

The utility model provides a little pipe that little vascular nerve decompression art was used, little pipe is including storing up bag (1), with releasable mode and the release mechanism (4) that stores up bag (1) and be connected and release switch (7) that control is carried out to release mechanism from distal end to near-end in proper order on its length direction, it has decompression pad (2) in the bag to store up. When the micro catheter for the nerve decompression of the utility model is used for the microvascular nerve decompression, the utility model has the excellent effects of no craniotomy, low risk, small micro wound, rapid operation, short recovery time, nerve function retention, high long-term curative effect and the like.

Description

Micro-catheter for microvascular nerve decompression

Technical Field

The utility model relates to a medical instrument particularly, relates to a little pipe that little blood vessel nerve decompression art was used.

Background

Facial spasm, also known as facial spasm, is a functional disease of cranial nerves. In the onset of disease, the hemilateral muscle paroxysmal involuntary twitching is caused because nerves in the cranium memory area of a patient are compressed by blood vessels and are positioned at the branches of the anterior inferior cerebellar artery or the posterior inferior cerebellar artery.

Trigeminal neuralgia is the most common cranial nerve disease, which is mainly manifested by paroxysmal severe pain repeatedly attacking in a trigeminal region at one side, the domestic counted incidence rate is 52.2/10 ten thousand, women are slightly more than men, and the incidence rate is increased with the age of the middle-aged and the elderly. The disease is characterized by severe pain in trigeminal nerve distribution region, such as sudden incisional sensation and burning sensation which are difficult to endure. Often, washing the face, brushing teeth, and even walking can result in paroxysmal and intense pain. Pain takes seconds or minutes, and the pain occurs periodically and is intolerable.

Aiming at the two diseases, at present, the microvascular decompression is mainly used for treatment in medical treatment, during the operation, a small incision is made behind the sick lateral ear of a patient, a small hole is drilled from the skull to enter the cranium, and a responsible vessel for compressing the facial nerve is found at the root part of the facial nerve. Then, it is slowly pushed away from the root of facial nerve, and a spacer, such as polytetrafluoroethylene or dacron spacer, is placed between them to completely separate blood vessel and facial nerve, so that the blood vessel does not press nerve any more, and the operation is finished.

Microvascular decompression was first proposed in 1967 by professor Jannatta and has now become the standard treatment for trigeminal neuralgia. The advantage is that the local vascular compression can be relieved, the intact trigeminal nerve sensory conduction can be maintained, and the loss of facial sensation can not occur. The operation has obvious effect, can solve the problems once and for all, has the effective rate of over 95 percent, low recurrence rate and small side effect.

However, since the operation belongs to craniotomy, the risk is high, the doctor operates under a microscope, and the action must be gentle, otherwise the neurovascular is easily damaged. In addition, when the stained tissue is separated or the cotton pad is placed, peripheral microvasculature is often touched or nerves are often squeezed, which causes nerve injury or bleeding, thereby affecting the success rate and the recurrence rate of the operation.

To overcome the above problems, patent document 1 proposes a push rod device for delivering a cotton pad patch, which attempts to perform a microvascular decompression operation with a single instrument. However, the patient still needs general anesthesia when the utility model is applied, and the craniotomy is performed, which can reduce the nerve injury caused by the operation, but still can not avoid the risk caused by the craniotomy.

In addition, in recent years, a surgical method for treating trigeminal neuralgia by percutaneous puncture of a balloon has been developed, and the operation is to paralyze nerve sensation by compressing a ganglion by the balloon, thereby reducing pain caused by vascular compression. Although the minimally invasive surgery is simple and convenient to operate and high in safety, the problems that the complete function of nerves cannot be reserved, the long-term curative effect is lower than that of a craniotomy and the like still exist.

Documents of the prior art

Patent document 1: CN205107771U

SUMMERY OF THE UTILITY MODEL

The mode of pressing the ganglion by the saccule in the prior art to treat trigeminal menstrual pain is to press the ganglion to be paralyzed and necrotized by the force spread by the saccule, and the pain can not be transferred due to the nerve paralysis and necrosis, so that the trigeminal neuralgia can be necessarily relieved, but the normal nerve function is damaged at the same time, and sequelae such as facial paralysis, facial paralysis and the like are frequently generated clinically.

In view of the problem that exists among the above-mentioned prior art, the utility model provides a little pipe that neural decompression art was used utilizes sacculus decompression pad to separate blood vessel and nerve alone to do not cause the not recoverable destruction to nerve, consequently, when utilizing this little pipe to carry out decompression operation, not only open the wound and mouthful little, reduce the risk of craniotomy, reduce surgical instruments moreover and use, reduce the risk of nerve damage.

In order to solve the above problems, the utility model provides a concrete solution as follows:

a micro catheter for microvascular nerve decompression characterized in that it comprises in order from the distal end to the proximal end in its length direction a reservoir bag having a decompression pad therein, a release mechanism releasably connected to the reservoir bag, and a release switch controlling the release mechanism.

In the above-described microcatheter for microvascular nerve decompression, preferably, the reservoir is made of a degradable polymer or polysaccharide, and has degradability and flexibility.

In the micro catheter for microvascular nerve decompression, the reservoir is preferably composed of a mixture of 1 or more selected from the group consisting of polylactic acid, cellulose, hyaluronic acid, alginic acid, gelatin and wood.

In the above-mentioned microcatheter for microvascular nerve decompression, preferably, the decompression pad is made of polytetrafluoroethylene, dacron, polyvinyl alcohol or nylon having bio-inertness.

In the micro catheter for microvascular nerve decompression, preferably, a joining portion for connecting to a release mechanism is provided at a trailing end of the reservoir.

In the micro catheter for microvascular nerve decompression, preferably, the head end of the reservoir and the tail end of the reservoir are provided with a visualization mark, respectively.

In the above-described microcatheter for microvascular nerve decompression, preferably, the visualization marker is ferroferric oxide, iron particles, barium sulfate, zirconium dioxide, tantalum metal, or platinum.

In the micro catheter for microvascular nerve decompression, preferably, the release mechanism is a magnetic release mechanism, an electrochemical release mechanism, a latch release mechanism, a screw release mechanism, or a liquid degradation mechanism.

Effect of the utility model

Through the utility model discloses a little pipe, it is little not only to open the wound when carrying out the decompression operation, reduces the risk of opening the cranium, reduces the surgical instruments moreover and uses, reduces the risk of neural damage.

Drawings

Fig. 1 is a schematic view of a microcatheter for microvascular nerve decompression according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing neuralgia caused by the compression of responsible blood vessels due to pathological changes of trigeminal nerve.

Fig. 3 is a flowchart showing a decompression operation performed by using the micro catheter for microvascular nerve decompression of the present invention.

Fig. 4 is a flowchart showing a decompression operation performed by using the micro catheter for microvascular nerve decompression of the present invention.

Description of the reference numerals

1. Storing the bags; 2. a pressure reducing pad; 31. a head end of the reservoir; 32, a first step of removing the first layer; the tail end of the storage bag; 4. a release mechanism; 5. a metal guide wire; 6. a hose; 7. releasing the switch; 8; a large conduit; 9. the trigeminal nerve; 10. culprit blood vessel

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to this.

The structure of the micro-catheter of the utility model

Fig. 1 is a schematic view of a microcatheter according to an embodiment of the present invention. As shown in fig. 1, the microcatheter is provided with a reservoir (1), a release mechanism (4) detachably connected to the reservoir (1), and a release switch (7) for controlling the release mechanism (4) in this order from the distal end (end away from the operator) to the proximal end in the longitudinal direction.

In order to transport the pressure reduction pad to the target site, the inventors have conducted a great deal of research and found that there is difficulty and difficulty in carrying the pressure reduction pad with a catheter or the like, and therefore, the inventors have adopted a degradable storage bag which can be transported easily through the storage bag, and the storage bag can be degraded by itself after reaching the target site to release the pressure reduction pad, thereby achieving the above object of the present invention. The storage bag (1) used in the present invention has degradability and flexibility, and is preferably composed of a degradable polymer or polysaccharide, and for example, it is composed of 1 or a mixture of 1 or more selected from polylactic acid, cellulose, hyaluronic acid, alginic acid, gelatin and wood. The storage bag (1) is internally provided with a pressure reducing pad (2), the pressure reducing pad (2) is made of bio-inert Polytetrafluoroethylene (PTFE), terylene (Dacron), polyvinyl alcohol (PVA), Nylon (Nylon) and the like, and for example, a pressure reducing cotton pad can be adopted. When the pressure reducing pad is placed between nerves and blood vessels, the pressure reducing pad can play a role for a long time due to biological inertia, thereby preventing neuralgia caused by nerve compression by responsible blood vessels.

The utility model discloses in, there are head end (31) of storing up the bag, tail end (32) of storing up the bag respectively at the both ends of storing up bag (1), can be equipped with the joint position that is used for being connected with disengagement mechanism at tail end (32) of storing up the bag, in addition, still can be equipped with the development mark respectively at head end (31) and tail end (32) of storing up the bag and be used for supplying the operator to confirm its position.

The developing mark may be a magnetic mark such as ferroferric oxide or iron particles. When a magnetic visualization marker is used at the trailing end (32) of the reservoir, the visualization marker can simultaneously serve as a binding site for effecting attachment to the detachment mechanism in conjunction with the magnetic catheter. The development mark may be a mark having no magnetism, such as barium sulfate, zirconium dioxide, tantalum metal, platinum, or the like. As described above, the developing marks are respectively arranged at the head end (31) and the tail end (32) of the storage bag, so that an operator can be helped to accurately arrange the pressure reduction pad at a target position, and the pressure reduction effect is improved.

When the storage bag (1) is conveyed to a target point through the releasing mechanism (4), the releasing mechanism (4) is separated from a combined part arranged at the tail end (32) of the storage bag by controlling the releasing switch (7), so that the storage bag (1) is placed at the target point, and after the storage bag (1) is degraded, the pressure reducing pad (2) stored in the storage bag is released to play a pressure reducing role. The release mechanism may be, for example, a magnetic release mechanism, an electrochemical release mechanism, a trip release mechanism, a screw release mechanism, or a liquid degradation mechanism.

As shown in fig. 1, the release mechanism (4) in the microcatheter of the present embodiment is connected to a release switch (7) via a metal guide wire (5) provided in a hose (6), and the operator controls the release mechanism (4) by closing the release switch (7) to place the reservoir (1) at a target position.

The utility model discloses an operation process of little pipe

In the operation process, the operation is performed under general anesthesia, and the patient can adopt a supine position. The puncture needle-inserting point is 2.5 cm outside the affected side corner of mouth, and the other two reference points are the inner edge of the pupil and the front 3 cm of the horizontal external auditory canal of zygomatic arch on the same side. The foramen ovale was punctured with a 14 gauge needle under X-ray fluoroscopy guidance. The needle tip is withdrawn from the needle core when reaching the basicranial foramen ovale, and then the micro-catheter of the utility model is slowly pushed into the Mackel sac area (Meckel cave) through the puncture needle.

In an embodiment, from the puncture of patient's facial skin through the oval hole reachs the mike's sac district, take out the pjncture needle, will the utility model discloses a little pipe slowly pushes away to the affected part, under the X ray is supplementary, places the storage bag in the nerve position of vascular oppression through the development mark of locating storage bag head and tail end, separates the responsibility blood vessel and the nerve that is pressed, accomplishes to place the back, sees through release switch control release mechanism, separates storage bag and little pipe to take out the little pipe slowly. According to the situation, the process is repeated to place the pressure reduction pad so as to achieve complete pressure reduction of the microvasculature. .

Examples

The present invention will be described in further detail below with reference to examples.

The microcatheter of this example was constructed as follows: the storage bag is made of cellulose, the decompression pad is made of medical grade pure polytetrafluoroethylene, the developing mark is magnetic ferroferric oxide and can also act on a combination part connected with the releasing mechanism, and the releasing mechanism realizes the combination and separation of the storage bag and the guide wire through the principle of magnetic adsorption.

An operator controls the release switch (7), the component with the magnet inside conducts the magnetic field to the front end of the guide wire through the near end of the guide wire, the component is combined with a magnetic combination part arranged at the tail end of the storage bag (the interior of the storage bag is provided with a pressure reduction pad), the storage bag is combined and then slowly pushed to an affected part, and then the release switch (7) is operated to separate the component with the magnet inside from the near end of the guide wire, so that the magnetic field at the front end of the guide wire disappears instantly, and the front end of the guide wire is separated from the storage bag. After the placement is finished, the reservoir bag is degraded in the environment filled with cerebrospinal fluid, the decompression pad is released, and then the decompression pad plays a role in permanently isolating responsible blood vessels from nerves, so that the purpose of nerve decompression is achieved.

See in particular fig. 2-4. FIG. 2 is a schematic view showing neuralgia caused by the compression of the trigeminal nerve (9) by the affected blood vessel (10) due to a lesion or the like. Fig. 3 is a flowchart showing a decompression operation performed by using the micro catheter for microvascular nerve decompression of the present invention. As shown in figure 3, after the micro catheter of the utility model enters the affected part, the capsule (1) is placed at the position of the blood vessel compression nerve through the developing mark arranged at the head end and the tail end of the capsule, the responsible blood vessel (10) and the compressed trigeminal nerve (10) are separated, after the placing is completed, the operator controls the releasing mechanism (4) through the releasing switch (7), the capsule and the micro catheter are separated, and the micro catheter is slowly drawn out. If desired, the above procedure may be repeated to place multiple reservoirs to achieve complete depressurization of the microvasculature as shown in figure 4.

Claims

1. A micro catheter for microvascular nerve decompression characterized in that it comprises in order from the distal end to the proximal end in its length direction a reservoir bag having a decompression pad therein, a release mechanism releasably connected to the reservoir bag, and a release switch controlling the release mechanism.

2. The microcatheter of claim 1, wherein said reservoir is comprised of a degradable polymer or polysaccharide and has degradability and flexibility.

3. The microcatheter of claim 1, wherein the reduced pressure pad is comprised of biologically inert polytetrafluoroethylene, dacron, polyvinyl alcohol, or nylon.

4. The microcatheter of claim 1, wherein a binding site is provided at the trailing end of the reservoir for connection to a release mechanism.

5. The microcatheter of claim 1, wherein a visualization mark is provided at the head end of the reservoir and at the tail end of the reservoir, respectively.

6. The microcatheter of claim 5, wherein the visualization marker is ferroferric oxide, iron particles, barium sulfate, zirconium dioxide, tantalum metal, or platinum gold.

7. The microcatheter of claim 1, wherein said release mechanism is a magnetic release mechanism, an electrochemical release mechanism, a bayonet release mechanism, a screw release mechanism, or a liquid degradation mechanism.