CN113384345A - Renal artery microwave ablation needle - Google Patents
Renal artery microwave ablation needle Download PDFInfo
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- CN113384345A CN113384345A CN202110764375.5A CN202110764375A CN113384345A CN 113384345 A CN113384345 A CN 113384345A CN 202110764375 A CN202110764375 A CN 202110764375A CN 113384345 A CN113384345 A CN 113384345A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00505—Urinary tract
- A61B2018/00511—Kidney
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/1869—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves with an instrument interstitially inserted into the body, e.g. needles
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- Heart & Thoracic Surgery (AREA)
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Abstract
The invention relates to the technical field of medical instruments, in particular to a renal artery microwave ablation needle. The specific technical scheme is as follows: a renal artery microwave ablation needle comprises an outer tube with one closed end and one open end, a needle tube sleeved in the outer tube and a cable arranged in the needle tube, wherein an electrode adjusting device is arranged in the outer tube and close to the closed end of the outer tube, an electrode is fixed on the electrode adjusting device, an arc-shaped hole for extending out of a power supply electrode is formed in the side wall of the outer tube, a circular truncated cone-shaped joint is arranged at one end of the needle tube, and the circular truncated cone-shaped joint is matched with the electrode adjusting device; and under the action of the truncated cone-shaped joint, the electrode gradually extends out of the outer pipe. The invention solves the problem that the distance between the electrode and the inner wall of the renal artery can not be adjusted in real time in the prior art.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a renal artery microwave ablation needle.
Background
Clinical studies have found that modulation of renal nerves can significantly reduce refractory hypertension. In the prior art, renal artery ablation is mostly adopted, an electrode catheter is sent to a specific part of a renal artery, radio frequency current is released to cause local coagulative necrosis of sympathetic nerves of the renal artery, and an interventional technology for removing nerves is achieved. However, due to individual differences, there are certain differences in the diameter of the renal arteries and the location of the sympathetic nerves among different persons. In the prior art, the diameter of the electrode on the ablation catheter is fixed, so that the electrode cannot be well adapted to the renal artery environment of a patient and cannot adapt to the variable environment in a human body.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a renal artery microwave ablation needle, which solves the problem that the distance between an electrode and the inner wall of a renal artery cannot be adjusted in real time in the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention discloses a renal artery microwave ablation needle, which comprises an outer tube, a needle tube and a cable, wherein one end of the outer tube is closed, and the other end of the outer tube is opened; and under the action of the truncated cone-shaped joint, the electrode gradually extends out of the outer pipe.
Preferably, the electrode adjusting device comprises an arc-shaped plate, arc-shaped threads are arranged on the inner arc surface of the arc-shaped plate, a connecting plate is fixed on the outer arc surface of the arc-shaped plate, the side surface of the connecting plate corresponding to the arc-shaped plate is an arc surface, the electrode is fixed on the arc surface, the electrode is located in an arc-shaped hole, a sealing ring is arranged in the arc-shaped hole, and the electrode is tightly attached to the sealing ring; the outer wall of the circular truncated cone-shaped joint is provided with a thread groove, and the arc-shaped threads are matched with the thread groove.
Preferably, the arc is provided with the several, electrode evenly distributed is in the arc of outer tube is downthehole, the several the arc combines back to make up into the inside hollow round platform shape of both ends opening, and big footpath end towards outer tube opening part setting, and the arc screw thread forms complete annular thread, the arc screw thread on the arc forms complete screw thread after several arc combination, the diameter that the footpath of the minor diameter end that the round platform shape connects is less than the big footpath end of the arc after combining.
Preferably, the number of the arc-shaped plates is 1-4.
Preferably, a reed is arranged between the arc-shaped plate and the inner wall of the outer pipe.
Preferably, a closed annular cavity is arranged in the inner wall of the needle tube and around the axis of the needle tube, one end of the needle tube is respectively communicated with a water inlet pipe and a water outlet pipe, and the other end of the needle tube is connected with the truncated cone-shaped joint through a gasket.
Preferably, the cable is arranged at the axis of the needle tube, one end of the cable penetrates through the gasket, the wire core is inserted into the wire hole in the truncated cone-shaped joint, and the other end of the cable extends out of the needle tube and is in interference fit with the needle tube.
Preferably, the needle tube is inserted into the outer tube, and the truncated cone-shaped joint is inserted into the area surrounded by the plurality of arc-shaped plates and connected through threads.
Preferably, it is fixed through the rubber buffer between outer tube and the needle tubing, be provided with the through-hole that supplies the needle tubing to pass on the rubber buffer, one side of rubber buffer, be located be provided with a sealed section of thick bamboo on the through-hole, a sealed section of thick bamboo inserts seal in the annular space that forms between needle tubing and the outer tube.
Preferably, the bottom of the outer tube is a spherical head, and the outer tube is made of a non-conductive material.
The invention has the following beneficial effects:
the invention arranges a plurality of arc plates in the outer tube, the arc plates are fixed with a connecting plate, the connecting plate is connected with an electrode, at the same time, the end of the needle tube is provided with a cone-shaped joint, the cone-shaped joint is provided with a thread groove matched with the arc-shaped thread on the arc-shaped plate, after the needle tube is inserted into the area enclosed by the arc-shaped plate, the needle tube is rotated, under the action of the screw thread, the needle tube gradually moves towards the bottom of the outer tube, the arc-shaped plate drives the electrode to move towards the outside of the outer tube, thereby enlarging the diameter of the area surrounded by the plurality of electrodes, enabling the electrodes to contact the crossed nerves in the blood vessels with different diameters, the microwave generator releases energy, the energy is guided to the truncated cone-shaped joint through the cable, and then through annular plate direction electrode, the crossed nerve on the electrode contact blood vessel inner wall reduces or eliminates sympathetic nerve's activation, finally realizes adjusting the crossed nerve in the different diameters blood vessel.
Drawings
FIG. 1 is a schematic view of the structure of an outer tube according to the present invention;
FIG. 2 is a schematic view of the needle cannula;
FIG. 3 is a cross-sectional view of the outer tube;
FIG. 4 is a view taken along line A-A of FIG. 3;
FIG. 5 is an enlarged view of a portion A of FIG. 3;
FIG. 6 is a schematic structural diagram of an electrode adjustment device;
FIG. 7 is a cross-sectional view of the needle cannula;
FIG. 8 is a view showing the needle cannula extending into the outer tube and the electrodes extending out of the outer tube;
in the figure: the device comprises an outer tube 1, a needle tube 2, a cable 3, an electrode 4, a truncated cone-shaped joint 5, an arc-shaped plate 6, an arc-shaped thread 7, a connecting plate 8, a sealing ring 9, a thread groove 10, a reed 11, an annular cavity 12, a water inlet tube 13, a water outlet tube 14, a gasket 15 and a rubber plug 16.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless otherwise indicated, the technical means used in the examples are conventional means well known to those skilled in the art.
Referring to fig. 1-8, the invention discloses a renal artery microwave ablation needle, which comprises an outer tube 1 with one closed end and one open end, a needle tube 2 sleeved in the outer tube 1, and a cable 3 arranged in the needle tube 2, wherein the bottom of the outer tube 1 is a spherical head to avoid scratching the inner wall of a blood vessel. The outer tube 1 is made of non-conductive material, so that the electrode 4 and/or the connecting plate 8 are prevented from conducting electricity to the outer tube 1, and the inner wall of the blood vessel is prevented from being damaged.
Further, an electrode adjusting device is arranged in the outer tube 1 and close to the closed end of the outer tube, an electrode 4 is fixed on the electrode adjusting device, an arc-shaped hole for the power supply electrode 4 to extend out is formed in the side wall of the outer tube 1, a circular truncated cone-shaped joint 5 is arranged at one end of the needle tube 2, and the large-diameter end of the circular truncated cone-shaped joint 5 is fixed with the end portion of the needle tube 2 and has the same diameter. The circular truncated cone-shaped joint 5 is matched with the electrode adjusting device; under the effect of the cone-shaped joint 5, the electrode 4 gradually extends out of the outer tube 1, so that the distance between the electrode 4 and the outer wall of the outer tube 1 is adjusted, and the electrode 4 can adapt to blood vessels with different diameters.
Specifically, the method comprises the following steps: the electrode adjusting device comprises an arc-shaped plate 6, and the axis of the arc-shaped plate 6 is overlapped with the axis of the outer tube 1. Arc threads 7 are arranged on the inner arc surface of the arc plate 6, a connecting plate 8 is fixed on the outer arc surface of the arc plate 6, the side surface of the connecting plate 8 corresponding to the arc plate 6 is an arc surface, an electrode 4 is fixed on the arc surface, and the electrode 4 is completely attached to the arc surface of the connecting plate 8. When the electrode adjusting device is not used, the electrode 4 is positioned in the arc-shaped hole, meanwhile, a sealing ring 9 is arranged in the arc-shaped hole, the electrode 4 is tightly attached to the sealing ring 9, and blood is prevented from entering the outer tube 1 through the arc-shaped hole as much as possible; the outer wall of the circular truncated cone-shaped joint 5 is provided with a thread groove 10, and the arc-shaped thread 7 is matched with the thread groove 10. It should be noted that: the arc thread 7 of the arc plate 6 is not a complete circular thread but a part thereof, and the thread grooves 10 of the other circular truncated cone-shaped joints 5 are matched, so that the needle tube 2 can move towards the inner bottom direction of the outer tube 1 under the action of the thread by screwing the needle tube 2, and the electrode 4 can gradually extend out of the outer tube 1. And because the shape of round platform shape joint 5, and it can be along the arc screw thread 7 on the arc 6 and do linear motion to make electrode 4 can stretch out outside outer tube 1 gradually, make the distance between electrode 4 and the outer tube 1 increase gradually, this kind is under the 1 condition for arc 1 quantity.
When the arc-shaped plates 6 are provided with a plurality of, preferably 2-4, the arc-shaped plates 6 are arranged into a circle, and the axis coincides with the axis of the outer pipe 1. The electrodes 4 are uniformly distributed in the arc-shaped holes of the outer tube 1, that is, the arc-shaped holes are also uniformly distributed on the side wall of the outer tube 1. When the arc 6 sets to a plurality ofly, the inside hollow round platform shape of both ends opening, and big footpath end towards outer tube 1 opening part setting are made up to several arc 6 combinations back, and arc 7 forms complete ring thread, can understand: the arc-shaped plate 6 is an arc-shaped plate which is divided into equal sizes along the side wall of the circular truncated cone-shaped annular plate at equal intervals, and the inner wall of the annular plate is provided with threads, and when the annular plate is cut, the threads are also cut, so that an incomplete arc-shaped thread 7 is formed. Therefore, the arc-shaped threads 7 on the arc-shaped plates 6 form complete threads after several arc-shaped plates 6 are combined. And the thread groove 10 is matched with the arc-shaped thread 7, namely, the arc-shaped thread 7 is arranged in the thread groove 10. Of course, the thread groove 10 may be provided as an external thread adapted to the arc-shaped thread 7, and the needle tube 2 may be linearly moved in a screwed state.
Meanwhile, the diameter of the small-diameter end of the frustum-shaped joint 5 is smaller than the diameter of the large-diameter end of the annular plate formed by combining the plurality of arc-shaped plates 6, so that the frustum-shaped joint 5 can be smoothly inserted into the area surrounded by the arc-shaped plates 6. When the circular truncated cone shaped joint 5 is not in contact with the arc-shaped plates 6, the arc-shaped plates 6 may be in a combined state or in a separated state as shown in fig. 3 and 4.
Further, in order to ensure the stability of the arc-shaped plate 6 in the outer tube 1 and to reset the electrode 4 after extending out of the outer tube 1, a spring plate 11 is arranged between the arc-shaped plate 6 and the inner wall of the outer tube 1, and other elastic members can be arranged and are not limited to the spring plate.
Furthermore, in order to cool the cable 3 in the needle tube 2, a closed annular cavity 12 is arranged in the inner wall of the needle tube 2 around the axis of the needle tube, one end of the needle tube 2 is respectively communicated with a water inlet pipe 13 and a water outlet pipe 14, the water inlet pipe 13 and the water outlet pipe 14 are respectively connected with corresponding equipment, such as a water pump, a water tank and the like, so as to cool the cable 3 in the needle tube 2, the other end of the needle tube is connected with the truncated cone-shaped joint 5 through a gasket 15, and the gasket 15 is mainly arranged in order to isolate the truncated cone-shaped joint 5 from the needle tube 2 and prevent the needle tube 2 from conducting electricity.
Further, the cable 3 is arranged at the axis of the needle tube 2, one end of the cable passes through the gasket 15, the wire core is inserted into the wire hole on the truncated cone-shaped joint 5, the wire core is not in contact with the gasket 15, the other end of the cable extends out of the needle tube 2 and is in interference fit with the needle tube 2, namely, a backing ring is arranged at the outlet of the needle tube 2, and the cable 3 is fixed in the needle tube 2. One end of the cable 3 extending out of the needle tube 2 is connected with a connector lug which can be inserted into energy emitting equipment, such as a microwave generator and the like.
Further, the outer tube 1 and the needle tube 2 are fixed by a rubber plug 16, the rubber plug 16 is provided with a through hole for the needle tube 2 to pass through, one side of the rubber plug 16, which is positioned on the through hole, is provided with a sealing cylinder, and the sealing cylinder is inserted into an annular space formed between the needle tube 2 and the outer tube 1 for sealing. In the fixing process, the needle tube 2 passes through the through hole, and the sealing cylinder is inserted into an annular space formed between the needle tube 2 and the outer tube 1, so that the needle tube 2 is sealed with the outer tube 1, and the needle tube 2 is positioned at the axis center of the outer tube 1 to prevent the needle tube 2 from inclining. The rubber plug 16 is made of rubber, so that the twisting of the needle tube 2 is not affected.
In use, the needle cannula 2 is inserted into the outer tube 1 and the frusto-conical adapter 5 is inserted into the area enclosed by the plurality of arcuate plates 6 such that the thread groove 10 and the arcuate thread 7 are threadedly engaged. Then, the needle tube 2 is screwed, under the action of the screw thread, the needle tube 2 gradually moves towards the bottom of the outer tube 1 in a straight line, in the process, the arc-shaped plate 6 gradually moves towards the inner wall of the outer tube 1, and the electrode also gradually moves towards the outside of the outer tube 1 until the distance between the electrode 4 and the outer tube 1 is maximum when the circular truncated cone-shaped joint 5 moves to be close to the bottom of the arc-shaped plate 6. When the round platform shape connects 5 to revolve soon downwards, several arc 6 is strutted gradually, because arc screw thread 7 is in the state of adaptation with thread groove 10 for arc 6 is in the in-process towards 1 inner wall linear motion of outer tube, and does not influence arc screw thread and thread groove and be in threaded connection's state all the time, and the arc screw thread is in the thread groove all the time promptly, connects along with the round platform shape and rotates, and the arc screw thread also rotates along with the thread groove in the thread groove, and the arc moves towards outside inside pipe wall. The arc-shaped plate, the connecting plate and the circular truncated cone-shaped joint are all made of metal materials, so that energy can be conveniently transferred to the electrode.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. The utility model provides a renal artery microwave ablation needle, includes that one end seals one end open-ended outer tube (1), cover and establish needle tubing (2) in outer tube (1) and cable (3) of setting in needle tubing (2), its characterized in that: an electrode adjusting device is arranged in the outer tube (1) and close to the closed end of the outer tube, an electrode (4) is fixed on the electrode adjusting device, an arc-shaped hole for the electrode (4) to extend out is formed in the side wall of the outer tube (1), a truncated cone-shaped joint (5) is arranged at one end of the needle tube (2), and the truncated cone-shaped joint (5) is matched with the electrode adjusting device; under the action of the truncated cone-shaped joint (5), the electrode (4) gradually extends out of the outer tube (1).
2. The renal artery microwave ablation needle according to claim 1, wherein: the electrode adjusting device comprises an arc-shaped plate (6), arc-shaped threads (7) are arranged on the inner arc surface of the arc-shaped plate (6), a connecting plate (8) is fixed on the outer arc surface of the arc-shaped plate (6), the side surface, corresponding to the arc-shaped plate (6), of the connecting plate (8) is an arc surface, the electrode (4) is fixed on the arc surface, the electrode (4) is located in an arc-shaped hole, a sealing ring (9) is arranged in the arc-shaped hole, and the electrode (4) is tightly attached to the sealing ring (9); the outer wall of the circular truncated cone-shaped joint (5) is provided with a thread groove (10), and the arc-shaped threads (7) are matched with the thread groove (10).
3. The renal artery microwave ablation needle as claimed in claim 2, wherein: arc (6) are provided with the several, electrode (4) evenly distributed is in the arc of outer tube (1) is downthehole, the several combine into inside hollow round platform shape of both ends opening after arc (6) merge, and big footpath end towards outer tube (1) opening part setting, and arc screw thread (7) form complete annular thread, arc screw thread (7) on arc (6) form complete screw thread after several arc (6) combine, the diameter that the footpath of round platform shape joint (5) held is less than the big footpath end of arc (6) after merging.
4. The renal artery microwave ablation needle according to claim 1, wherein: the number of the arc-shaped plates (6) is 1-4.
5. The renal artery microwave ablation needle according to claim 1, wherein: a reed (11) is arranged between the arc-shaped plate (6) and the inner wall of the outer pipe (1).
6. The renal artery microwave ablation needle according to claim 1, wherein: the round table-shaped connector is characterized in that a closed annular cavity (12) is arranged in the inner wall of the needle tube (2) and surrounds the axis of the needle tube, one end of the needle tube (2) is communicated with a water inlet tube (13) and a water outlet tube (14) respectively, and the other end of the needle tube is connected with the round table-shaped connector (5) through a gasket (15).
7. The renal artery microwave ablation needle according to claim 6, wherein: the cable (3) is arranged at the axis of the needle tube (2), one end of the cable penetrates through the gasket (15) and the wire core is inserted into the wire hole in the truncated cone-shaped joint (5), and the other end of the cable extends out of the needle tube (2) and is in interference fit with the needle tube (2).
8. The renal artery microwave ablation needle according to claim 3, wherein: the needle tube (2) is inserted into the outer tube (1), and the truncated cone-shaped joint (5) is inserted into an area surrounded by the plurality of arc-shaped plates (6) and connected through threads.
9. The renal artery microwave ablation needle according to claim 8, wherein: it is fixed through rubber buffer (16) between outer tube (1) and needle tubing (2), be provided with the through-hole that supplies needle tubing (2) to pass on rubber buffer (16), one side of rubber buffer (16), be located be provided with a sealed section of thick bamboo on the through-hole, a sealed section of thick bamboo inserts seal in the annular space that forms between needle tubing (2) and outer tube (1).
10. The renal artery microwave ablation needle according to claim 1, wherein: the bottom of the outer tube (1) is a spherical head, and the outer tube (1) is made of a non-conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110764375.5A CN113384345A (en) | 2021-07-06 | 2021-07-06 | Renal artery microwave ablation needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110764375.5A CN113384345A (en) | 2021-07-06 | 2021-07-06 | Renal artery microwave ablation needle |
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| Publication Number | Publication Date |
|---|---|
| CN113384345A true CN113384345A (en) | 2021-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110764375.5A Pending CN113384345A (en) | 2021-07-06 | 2021-07-06 | Renal artery microwave ablation needle |
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| CN (1) | CN113384345A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113729922A (en) * | 2021-09-28 | 2021-12-03 | 苏州瀚诺馨生物科技有限公司 | Single-channel radio frequency tissue ablation device |
-
2021
- 2021-07-06 CN CN202110764375.5A patent/CN113384345A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113729922A (en) * | 2021-09-28 | 2021-12-03 | 苏州瀚诺馨生物科技有限公司 | Single-channel radio frequency tissue ablation device |
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