CN215606236U

CN215606236U - Renal artery microwave ablation needle

Info

Publication number: CN215606236U
Application number: CN202121533645.3U
Authority: CN
Inventors: 赵德兵
Original assignee: Nanjing Devon Medical Technology Co ltd
Current assignee: Nanjing Devon Medical Technology Co ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2022-01-25
Anticipated expiration: 2031-07-06

Abstract

The utility model 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 a needle tube stabilizing mechanism is arranged in the outer tube and close to the closed end of the outer tube, a needle tube stabilizing assembly comprises an arc-shaped plate elastically arranged on the inner wall of the outer tube, an arc-shaped thread is arranged on the inner arc surface of the arc-shaped plate, one end of the needle tube is provided with a joint, an external thread matched with the arc-shaped thread is arranged on the joint, and a needle point is connected to the joint through a thread; a circular opening is formed in the center of the closed end of the outer pipe, and a rubber pad is fixed on the circular opening. The utility model solves the problem that the prior art can not perform targeted ablation according to the size of the tumor when the tumor of the kidney is eliminated.

Description

Renal artery microwave ablation needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a renal artery microwave ablation needle.

Background

In recent years, with the continuous progress of minimally invasive techniques, there has been a gradual transition from radical nephrectomy to nephron-sparing surgery in the treatment of renal tumors. However, renal tumor enucleation requires cutting of renal artery during operation, which may cause thermal ischemia damage to kidney. The traditional concept considers that the renal ischemia time limit is less than 30min, and the renal function of the patient is irreversibly damaged. While the scholars in the prior art combine radiofrequency ablation with traditional renal tumor enucleation to achieve a technique that does not block the renal pedicle blood vessels. However, the high temperature generated by the conventional microwave ablation needle during microwave ablation damages blood and other tissues in the blood vessel, and thus it is impossible to perform targeted ablation in a tumor range according to the size of the tumor.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a renal artery microwave ablation needle, which solves the problem that the targeted ablation can not be carried out according to the size of a tumor when the tumor of the kidney is eliminated in the prior art.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model 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; a circular opening is formed in the center of the closed end of the outer pipe, and a rubber pad is fixed on the circular opening.

Preferably, the outer arc surface of the arc plate is fixedly connected with the inner wall of the outer tube through a reed, and the axis of the arc plate is coincided with the axis of the needle tube.

Preferably, the arc is provided with the several, evenly fixes in the outer tube, and the axle center coincidence, several the arc is the round platform shape after merging, and its major diameter opening sets up towards the opening part of outer tube: the needle tube is inserted into the outer tube, and the joint is inserted into the area surrounded by the arc-shaped plates and connected through threads.

Preferably, a telescopic sleeve is fixed between the arc-shaped plate and the inner wall of the outer pipe, and the telescopic sleeve and the reed are arranged up and down correspondingly.

Preferably, the needle point is conical, the joint is in a circular truncated cone shape, a circular truncated cone-shaped groove is formed in the bottom of the needle point, the small-diameter end of the groove is located in the needle point, and the height of the groove is smaller than that of the needle point; an internal thread matched with the external thread is arranged in the groove, and the height of the needle point is smaller than that of the joint.

Preferably, after the joint is in threaded connection with the needle tip, the small-diameter end of the joint abuts against the small-diameter end of the groove, and the needle tip corresponds to the center of the rubber pad.

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 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 joint, and the other end of the cable extends out of the needle tube and is in interference fit with the needle tube.

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 closed end of the outer tube is a spherical surface, the circular opening is arranged at the center of the spherical surface, and the circle center of the circular opening is located on the axis of the outer tube.

The utility model has the following beneficial effects:

according to the utility model, at least one arc-shaped plate is elastically connected in the outer tube, the inner wall of the arc-shaped plate is provided with an arc-shaped thread, the end part of the needle tube is provided with a joint, the joint is provided with an external thread which can be connected with the arc-shaped plate through the thread, meanwhile, the end part of the joint is connected with the needle point through the thread, and the end part of the joint is contacted with the bottom in the needle point groove to form a passage. The needle tube is inserted into the outer tube, the joint is inserted into the area defined by the arc-shaped plate, and then the needle tip on the joint gradually moves towards the closed end of the outer tube under the action of the threads only by screwing the needle tube until the rubber pad at the closed end is pierced, and the needle tip gradually extends out of the outer tube in the process of continuously screwing the needle tube, so that the length of the needle tip extending out of the outer tube is controlled, the needle tip is prevented from being excessively contacted with human tissues or blood, and tumors with different sizes can be ablated.

Drawings

FIG. 1 is a schematic view of the structure of an outer tube according to the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a view taken along line A-A of FIG. 1;

FIG. 4 is an overall view of the outer tube;

FIG. 5 is a cross-sectional view of the outer tube;

FIG. 6 is a schematic view of a tip configuration;

FIG. 7 is a view showing the state in which the needle cannula is inserted into the outer tube;

in the figure: the device comprises an outer tube 1, a needle tube 2, a cable 3, an arc-shaped plate 4, an arc-shaped thread 5, a connector 6, an external thread 7, a needle point 8, a rubber pad 9, a reed 10, a telescopic sleeve 11, a groove 12, an annular cavity 13, a water inlet tube 14, a water outlet tube 15, a gasket 16 and a rubber plug 17.

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. 1-7, the utility model 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 closed end of the outer tube 1 is spherical, so that the inner wall of a blood vessel or human tissue is prevented from being scratched. The outer tube 1 is made of non-conducting materials, so that the needle point 8 is prevented from conducting electricity to the outer tube 1, and human tissue damage is avoided.

Further, in outer tube 1, be provided with needle tubing stabilizing mean near its blind end, needle tubing stabilizing assembly includes that elasticity sets up arc 4 on 1 inner wall of outer tube, specifically is: the outer cambered surface of the arc-shaped plate 4 is fixedly connected with the inner wall of the outer tube 1 through a reed 10, and the axis of the arc-shaped plate 4 is superposed with the axis of the needle tube 2, so that the needle tube 2 is positioned at the center in the outer tube 1. In order to increase the stability of the needle tube 2 after contacting the arc-shaped plate 4, a telescopic tube 11 is fixed between the arc-shaped plate 4 and the inner wall of the outer tube 1, and the telescopic tube 11 and the spring leaf 10 are vertically and correspondingly arranged, so that the arc-shaped plate 4 moves towards the inner wall of the outer tube 1 under the extrusion of the needle tube 2. The telescopic tube 11 can be compressed, and the telescopic tube 11 has the same structure as the telescopic rod and can be formed by sleeving a plurality of tubes. Therefore, the arc-shaped plate 4 cannot shake in the outer pipe 1 due to the arrangement of the spring 10 and the telescopic tube 11.

Further, in order to realize that the connection between needle tubing 2 and outer tube 1 is fixed, be provided with arc screw thread 5 on the intrados of arc 4, and the one end of needle tubing 2 is provided with joint 6, connects 6 and is the round platform shape, is provided with the external screw thread 7 with the adaptation of arc screw thread 5 on the lateral wall of joint 6, and arc screw thread 5 can block on external screw thread 7 promptly. Meanwhile, the connector 6 is in threaded connection with a needle point 8, the needle point 8 is conical, the bottom of the needle point 8 is provided with a circular truncated cone-shaped groove 12, namely, the bottom of the needle point 8 is provided with a groove 12 towards the tip of the needle point, the small-diameter end of the groove 12 is positioned in the needle point 8, the height of the groove 12 is smaller than that of the needle point 8, namely, the tip of the needle point 8 is solid. The groove 12 is internally provided with an internal thread matched with the external thread 7, namely the joint 6 is matched with the groove 12, so that the needle point 8 is fixedly connected with the joint 6 through the thread, and after the joint 6 is in threaded connection with the needle point 8, the small-diameter end of the joint 6 is abutted against the small-diameter end of the groove 12, so that energy can be transmitted to the needle point 8 through the joint 6. And the height of the needle point 8 is less than that of the joint 6, so that the part of the joint 6 close to the needle tube 2 is fixedly connected with the arc-shaped thread 5 through threads, and the length of the needle point 8 extending out of the outer tube 1 is adjusted.

Furthermore, in order to avoid blood or body fluid from being counted into the outer tube 1, a circular opening is arranged at the center of the closed end of the outer tube 1, the circle center of the circular opening is located on the axis of the outer tube 1, the size of the circular opening is set according to actual conditions, a rubber pad 9 is fixed on the circular opening, and the needle point 8 corresponds to the center of the rubber pad 9, so that when the needle point 8 moves in the vertical direction, the needle point 8 can accurately puncture the center of the rubber pad 9 and extend out of the outer tube 1. The matching relationship of the arc-shaped plate 4, the joint 6, the needle point 8 and the circular opening is as follows: when the tip of the needle tip 8 pierces the rubber pad 9 and is completely clamped at the circular opening and can not extend outwards, the joint of the joint 6 and the needle tube 2 is just in threaded connection with the inner wall of the bottom end of the arc-shaped plate 4 close to the circular opening. When the needle tube 2 screws the needle tip 8 to the lower part of the arc-shaped plate 4, the needle tip 8 is not contacted with the arc-shaped plate 4 all the time. And the arc-shaped plate 4 is made of non-conductive materials, so that the needle tube 2 is prevented from conducting electricity through the arc-shaped plate 4. The material of other parts or parts can be selected according to actual conditions.

Further, in order to increase the stability of needle tubing 2 in outer tube 1, arc 4 is provided with the several, evenly fixes in outer tube 1, along 1 inner wall week of outer tube upwards setting, and the axle center coincidence, is the round platform shape after several arc 4 merges, and its major diameter opening sets up towards the opening part of outer tube 1: the needle cannula 2 is inserted into the outer tube 1 and the adapter 6 is inserted into the area enclosed by the plurality of arc-shaped plates 4 and connected by screw threads. It can be understood that: the arc-shaped plate 4 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 meanwhile, the inner wall of the annular plate is provided with annular threads, and when the annular plate is cut, the annular threads are also cut, so that incomplete arc-shaped threads 5 are formed. Therefore, the arc-shaped threads 5 on the arc-shaped plates 4 form complete threads after several arc-shaped plates 4 are combined. Meanwhile, the diameter of the small-diameter end of the joint 6 is smaller than the diameter of the large-diameter end of the annular plate formed by combining the arc plates 4, so that the joint 6 can be smoothly inserted into the area surrounded by the arc plates 4. The plurality of arcuate plates 4 may be in a merged state when the tabs 6 are not in contact with the arcuate plates 4 or may be in a separated state as shown in fig. 1-3.

Furthermore, in order to cool the cable 3 in the needle tube 2, a closed annular cavity 13 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 tube 14 and a water outlet tube 15, the water inlet tube 14 and the water outlet tube 15 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 connector 6 through a gasket 16, and the gasket 16 is mainly arranged to isolate the connector 6 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 16 and the wire core is inserted into the wire hole on the joint 6, the wire core is not contacted 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 through a rubber plug 17, the rubber plug 17 is provided with a through hole for the needle tube 2 to pass through, one side of the rubber plug 17 is provided with a sealing barrel on the through hole, and the sealing barrel 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 17 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 adapter 6 is inserted into the area enclosed by the plurality of arcuate plates 4, such that the external thread 7 and the arcuate thread 5 are threadedly connected. Then, the needle tube 2 is screwed, the needle tube 2 with the needle point 8 gradually moves towards the bottom of the outer tube 1 in a straight line under the action of the threads, in the process, the arc-shaped plate 4 gradually moves towards the inner wall of the outer tube 1, the spring leaf 10 and the telescopic sleeve 11 are compressed until the needle point 8 gradually pierces the rubber pad 9, the length of the needle point 8 extending out of the closed end of the outer tube 1 is adjusted by screwing the needle tube 2, and therefore the needle point 8 is prevented from being excessively contacted with human tissues and/or blood to cause damage. When the connector 6 is screwed downwards, the arc plates 4 are gradually expanded, and the reaction force generated after the spring leaves 10 are compressed can enable the arc plates 4 to be connected with the connector 6 more tightly, so that the needle tube 2 is more stable in the outer tube 1.

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

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: a needle tube stabilizing mechanism is arranged in the outer tube (1) and close to the closed end of the outer tube, the needle tube stabilizing assembly comprises an arc-shaped plate (4) which is elastically arranged on the inner wall of the outer tube (1), an arc-shaped thread (5) is arranged on the inner arc surface of the arc-shaped plate (4), a joint (6) is arranged at one end of the needle tube (2), an external thread (7) matched with the arc-shaped thread (5) is arranged on the joint (6), and a needle point (8) is in threaded connection with the joint (6); a circular opening is formed in the center of the closed end of the outer pipe (1), and a rubber pad (9) is fixed on the circular opening.

2. The renal artery microwave ablation needle according to claim 1, wherein: the outer arc surface of the arc-shaped plate (4) is fixedly connected with the inner wall of the outer tube (1) through a reed (10), and the axis of the arc-shaped plate (4) is superposed with the axis of the needle tube (2).

3. The renal artery microwave ablation needle as claimed in claim 2, wherein: arc (4) are provided with the several, evenly fix in outer tube (1), and the axle center coincidence, several arc (4) are the round platform shape after merging, and its major diameter opening sets up towards the opening part of outer tube (1): the needle tube (2) is inserted into the outer tube (1), and the joint (6) is inserted into the area surrounded by the plurality of arc-shaped plates (4) and connected through threads.

4. The renal artery microwave ablation needle as claimed in claim 2, wherein: and a telescopic sleeve (11) is fixed between the arc-shaped plate (4) and the inner wall of the outer pipe (1), and the telescopic sleeve (11) and the reed (10) are arranged up and down correspondingly.

5. The renal artery microwave ablation needle according to claim 1, wherein: the needle point (8) is conical, the joint (6) is in a circular truncated cone shape, a circular truncated cone-shaped groove (12) is formed in the bottom of the needle point (8), the small-diameter end of the groove (12) is located in the needle point (8), and the height of the groove (12) is smaller than that of the needle point (8); an internal thread matched with the external thread (7) is arranged in the groove (12), and the height of the needle point (8) is smaller than that of the joint (6).

6. The renal artery microwave ablation needle according to claim 5, wherein: after the joint (6) is in threaded connection with the needle point (8), the small-diameter end of the joint (6) abuts against the small-diameter end of the groove (12), and the needle point (8) corresponds to the center of the rubber pad (9).

7. The renal artery microwave ablation needle according to claim 1, wherein: the needle tube is characterized in that a closed annular cavity (13) 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 pipe (14) and a water outlet pipe (15) respectively, and the other end of the needle tube is connected with the joint (6) through a gasket (16).

8. The renal artery microwave ablation needle according to claim 7, wherein: the cable (3) is arranged at the axis of the needle tube (2), one end of the cable penetrates through the gasket (16) and the wire core is inserted into the wire hole in the joint (6), and the other end of the cable extends out of the needle tube (2) and is in interference fit with the needle tube (2).

9. The renal artery microwave ablation needle according to claim 8, wherein: it is fixed through rubber buffer (17) between outer tube (1) and needle tube (2), be provided with the through-hole that supplies needle tube (2) to pass on rubber buffer (17), one side of rubber buffer (17), 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 tube (2) and outer tube (1).

10. The renal artery microwave ablation needle according to claim 1, wherein: the closed end of the outer tube (1) is a spherical surface, the circular opening is arranged at the center of the spherical surface, and the circle center of the circular opening is located on the axis of the outer tube (1).