CN210301208U - True circle water-cooling microwave ablation needle - Google Patents
True circle water-cooling microwave ablation needle Download PDFInfo
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- CN210301208U CN210301208U CN201920870441.5U CN201920870441U CN210301208U CN 210301208 U CN210301208 U CN 210301208U CN 201920870441 U CN201920870441 U CN 201920870441U CN 210301208 U CN210301208 U CN 210301208U
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- coaxial cable
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Abstract
The utility model discloses a true circle water-cooling microwave ablation needle, which comprises a needle body, a needle body front section, a needle body middle section and a needle body rear section, wherein the front end part of the needle body front section is a sharp part and a hole is formed at the front end part of the needle body front section; a coaxial cable disposed inside the needle body; a cooling tube group which is arranged inside the rear section of the needle body and is provided with a cooling inner tube surrounding the outer side of the coaxial cable and a cooling outer tube surrounding the outer side of the cooling inner tube; the positioning sleeve body is provided with a sleeve body front section and a sleeve body rear section; the cooling inner tube and the coaxial cable define a cooling water inlet cavity together, and the suction tube is contained in the cooling water inlet cavity. The beneficial effects of the utility model reside in that: the coaxial cable is cooled by means of water cooling, and heat dissipation efficiency is improved.
Description
Technical Field
The utility model relates to a medical instrument, especially a true circle water-cooling microwave ablation needle.
Background
Ablation therapy is mainly used in the medical fields of cardiovascular medicine, tumor surgery and the like. Microwave energy provided by a microwave ablation needle used in ablation treatment is radiated to tumor focus tissues, the microwave energy enables ions and polar water molecules in the tumor focus tissues to rotate, vibrate and rub with each other to generate a heat effect, and tumor cells are inactivated in a hot mode to achieve the purpose of tumor treatment. At present, the existing microwave ablation needle has the following problems: 1, a coaxial cable for transmitting microwave energy has high heat during working and cannot be cooled and radiated well; 2, the length of the coaxial cable is long, no device is arranged at the front end position to help positioning, and the situation that the front end is slightly deviated from the axis occurs. 3, tumor focus tissue could not be sampled.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem who solves first is that cooling radiating effect is not good among the prior art, and the technical problem that secondly will solve is coaxial cable's the slightly skew axle center of front end, and the technical problem that once more will solve is sampling tumour focus tissue, and provides a neotype true circle water-cooling microwave ablation needle.
In order to realize the purpose, the technical scheme of the utility model is as follows: a true circle water-cooling microwave ablation needle, which comprises,
the needle body is provided with a front needle body section, a middle needle body section and a rear needle body section, wherein the front end part of the front needle body section is a sharp part, and a hole is formed in the front end part of the front needle body section;
a coaxial cable disposed inside the needle body;
a cooling tube group which is arranged inside the rear section of the needle body and is provided with a cooling inner tube surrounding the outer side of the coaxial cable and a cooling outer tube surrounding the outer side of the cooling inner tube; and the number of the first and second groups,
the positioning sleeve body is provided with a sleeve body front section and a sleeve body rear section, the sleeve body front section is plugged between the coaxial cable and the needle body middle section, and the sleeve body rear section is plugged between the coaxial cable and the cooling outer tube;
the cooling outer pipe is arranged behind the front section of the sleeve body, and the front end surface of the cooling outer pipe is abutted against the rear end surface of the front section of the sleeve body;
the cooling inner tube and the coaxial cable jointly define a cooling water inlet cavity, a suction tube is contained in the cooling water inlet cavity, the front end of the suction tube sequentially penetrates through the rear section of the sleeve body and the front section of the sleeve body forward to extend to the interior of the front section of the needle body, and the rear end of the suction tube is used for being connected with an external negative pressure tube;
the cooling outer pipe and the cooling inner pipe define a cooling water return cavity together;
the cooling inner pipe is arranged behind the rear section of the sleeve body, and a front-back gap is formed between the front end surface of the cooling inner pipe and the rear end surface of the rear section of the sleeve body, so that the front end part of the cooling water inlet cavity is communicated with the front end part of the cooling water return cavity;
the rear end part of the cooling water inlet cavity is used for being connected with an external water inlet pipe;
the rear end part of the cooling water return cavity is used for being connected with an external water return pipe;
wherein, the cooling outer tube and the back section of the needle body jointly define a heat insulation cavity.
As a preferred scheme of the true circle water-cooling microwave ablation needle, a cooling connecting wall is arranged between the cooling inner tube and the cooling outer tube.
As a preferred scheme of the true-circle water-cooling microwave ablation needle, the cooling connecting walls are uniformly arranged along the circumferential direction.
As a preferred scheme of the true circle water-cooling microwave ablation needle, the front section of the sleeve body is in interference fit with the coaxial cable and the middle section of the needle body respectively.
As a preferred scheme of the true-circle water-cooling microwave ablation needle, the rear section of the sleeve body is in interference fit with the coaxial cable and the cooling outer tube respectively.
Compared with the prior art, the beneficial effects of the utility model reside in at least: 1, the design of a cooling water inlet cavity and a cooling water return cavity realizes the heat dissipation and cooling of the coaxial cable by using a water cooling mode, and improves the heat dissipation efficiency; 2, due to the design of the heat insulation cavity, the heat generated by the coaxial cable is prevented from being directly transferred to the rear section of the needle body, and the rear section of the needle body is prevented from being overheated to damage other tissues of the body; 3, the design of the cooling connecting wall increases the structural strength of the cooling inner pipe and the cooling outer pipe and prevents deformation; 4, the design of the positioning sleeve body integrates the middle section of the needle body, the coaxial cable and the cooling pipe group together, so that the position of the coaxial cable is not deviated and is always in the center, and meanwhile, the uniform heat dissipation of the coaxial cable can be ensured; and 5, by cooling the suction tube in the water inlet cavity, the tumor focus tissues can be sampled.
In addition to the technical problems, technical features constituting technical aspects, and advantageous effects brought by the technical features of the technical aspects described above, other technical problems, technical features included in the technical aspects, and advantageous effects brought by the technical features solved by the present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is an external view of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a cooling tube set according to an embodiment of the present invention.
Fig. 4 is a schematic radial cross-sectional view of a cooling tube stack according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Referring to fig. 1 to 4, a true-circle water-cooled microwave ablation needle is shown, which can be used for tumor ablation.
The cyst needle mainly comprises a needle body 1, a coaxial cable 2, a cooling tube group 3, a suction tube 4, a positioning sleeve body 5 and the like.
The needle body 1 has a front needle section 11, a middle needle section 12 and a rear needle section 13. The front end of the front needle section 11 is a pointed part and a hole 110 is formed at the front end of the front needle section 11. The front end of the front needle body segment 11 is used for penetrating tumor lesion tissues.
The coaxial cable 2 is disposed inside the needle body 1.
The cooling tube package 3 is placed inside the rear needle section 13. The cooling tube group 3 has a cooling inner tube 31 surrounding the outer side of the coaxial cable 2 and a cooling outer tube 32 surrounding the outer side of the cooling inner tube 31. A radial gap is formed between the coaxial cable 2 and the cooling inner tube 31. The cooling inner tube 31 and the cooling outer tube 32 have a radial gap. A radial gap is formed between the cooling outer tube 32 and the needle body rear section 13.
A cooling connecting wall 30 is provided between the cooling inner tube 31 and the cooling outer tube 32.
The cooling connecting walls 30 are uniformly arranged in the circumferential direction, and are arranged one above the other, one below the other, one left side and one right side. The design of the cooling connecting wall 30 increases the structural strength of the cooling inner tube 31 and the cooling outer tube 32, and prevents the cooling inner tube 31 and the cooling outer tube 32 from being deformed.
The positioning sleeve 5 has a front sleeve section 51 and a rear sleeve section 52. The front section 51 of the sheath body is plugged between the coaxial cable 2 and the middle section 12 of the needle body. The front section 51 of the sheath body is in interference fit with the coaxial cable 2 and the middle section 12 of the needle body respectively. The sheath rear section 52 is sealed between the coaxial cable 2 and the cooling outer tube 32. The jacket rear section 52 is in interference fit with the coaxial cable 2 and the cooling outer tube 32. The coaxial cable 2, the cooling inner tube 31, the cooling outer tube 32 and the positioning sleeve 5 have a common axis. The design of the positioning sleeve body 5 ensures that the position of the coaxial cable 2 does not deviate and is always in the center, and meanwhile, the uniform heat dissipation of the coaxial cable 2 can be ensured, and the condition that only part of the coaxial cable is cooled by water can not occur. The positioning sleeve body 5 can also isolate the microwave heat of the front end used for radiating the tumor.
Wherein the cooling outer tube 32 is disposed behind the jacket front section 51. The front end face of the cooling outer tube 32 abuts against the rear end face of the jacket front section 51.
Wherein, the cooling inner tube 31 and the coaxial cable 2 define a cooling water inlet cavity 101 together. The cooling water inlet chamber 31 accommodates a suction tube 4 therein. The front end of the suction tube 4 sequentially passes through the sheath rear section 52 and the sheath front section 51 forward to extend to the inside of the needle body front section 11.
The rear end part of the suction tube 4 is used for connecting an external negative pressure tube. The suction tube 4 and the positioning sleeve body 5 are sealed, and cooling water cannot flow into the front section 11 of the needle body.
Wherein, the cooling outer pipe 32 and the cooling inner pipe 31 jointly define a cooling water return cavity 102.
Wherein the cooling inner pipe 31 is disposed behind the jacket body rear section 52. A front-back gap 33 is formed between the front end surface of the cooling inner pipe 31 and the rear end surface of the jacket rear section 52, so that the front end of the cooling water inlet cavity 101 is communicated with the front end of the cooling water return cavity 102.
Wherein, the rear end of the cooling water inlet cavity 101 is used for connecting an external water inlet pipe.
Wherein, the rear end of the cooling water return cavity 102 is used for connecting an external water return pipe.
Wherein the cooling outer tube 32 and the needle body rear section 13 together define an insulating cavity 103. The interior of the insulating chamber 103 may be formed as a vacuum chamber, an air chamber, or a material chamber filled with an insulating material. The heat insulation cavity 103 plays a heat insulation role, so that heat generated by the coaxial cable 2 is prevented from being directly transmitted to the needle body rear section 13, and the needle body rear section 13 is prevented from being overheated to hurt other tissues of a body.
And (3) pumping: the microwave ablation needle is inserted into the body of a patient, and when the front end part of the front section 11 of the needle body reaches the tumor focus tissue, the front end part of the front section of the needle body pierces the tumor focus tissue. At this time, the negative pressure of the external negative pressure tube is opened, and under the action of the negative pressure, the tissue sac fluid firstly enters the interior of the front section 11 of the needle body from the hole 110, then passes through the suction tube 4, finally reaches the external negative pressure tube and is extracted, so that the sampling of the tumor focus tissue is completed.
The radiation process comprises the following steps: when the coaxial cable 2 works, a large amount of heat is generated, and cooling and heat dissipation are needed.
Cooling water is supplied to the cooling inlet chamber 101 through the outer inlet pipe. The cooling water enters from the rear end of the cooling water inlet cavity 101 and moves forward along the cooling water inlet cavity 101 to the front end of the cooling water inlet cavity 101. The cooling water enters the front end of the cooling water return cavity 102 through the gap 33 and reaches the rear end of the cooling water return cavity 102 backwards along the cooling water return cavity 102. And finally, discharging from the external water return pipe. The cooling water can take away part of the heat of the coaxial cable 2 in the whole flowing process, and plays a role in radiating the coaxial cable 2.
The above description is only intended to illustrate embodiments of the present invention, and the description is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. A true circle water-cooling microwave ablation needle is characterized in that the needle comprises,
the needle body is provided with a front needle body section, a middle needle body section and a rear needle body section, wherein the front end part of the front needle body section is a sharp part, and a hole is formed in the front end part of the front needle body section;
a coaxial cable disposed inside the needle body;
a cooling tube group which is arranged inside the rear section of the needle body and is provided with a cooling inner tube surrounding the outer side of the coaxial cable and a cooling outer tube surrounding the outer side of the cooling inner tube; and the number of the first and second groups,
the positioning sleeve body is provided with a sleeve body front section and a sleeve body rear section, the sleeve body front section is plugged between the coaxial cable and the needle body middle section, and the sleeve body rear section is plugged between the coaxial cable and the cooling outer tube;
the cooling outer pipe is arranged behind the front section of the sleeve body, and the front end surface of the cooling outer pipe is abutted against the rear end surface of the front section of the sleeve body;
the cooling inner tube and the coaxial cable jointly define a cooling water inlet cavity, a suction tube is contained in the cooling water inlet cavity, the front end of the suction tube sequentially penetrates through the rear section of the sleeve body and the front section of the sleeve body forward to extend to the interior of the front section of the needle body, and the rear end of the suction tube is used for being connected with an external negative pressure tube;
the cooling outer pipe and the cooling inner pipe define a cooling water return cavity together;
the cooling inner pipe is arranged behind the rear section of the sleeve body, and a front-back gap is formed between the front end surface of the cooling inner pipe and the rear end surface of the rear section of the sleeve body, so that the front end part of the cooling water inlet cavity is communicated with the front end part of the cooling water return cavity;
the rear end part of the cooling water inlet cavity is used for being connected with an external water inlet pipe;
the rear end part of the cooling water return cavity is used for being connected with an external water return pipe;
wherein, the cooling outer tube and the back section of the needle body jointly define a heat insulation cavity.
2. The true circle water-cooled microwave ablation needle as claimed in claim 1, wherein a cooling connecting wall is arranged between the cooling inner tube and the cooling outer tube.
3. A true circle water-cooled microwave ablation needle as in claim 2, wherein the cooling connecting walls are evenly arranged along the circumferential direction.
4. The true-circle water-cooled microwave ablation needle as claimed in any one of claims 1 to 3, wherein the front section of the sheath body is in interference fit with the coaxial cable and the middle section of the needle body respectively.
5. The true-circle water-cooled microwave ablation needle as claimed in any one of claims 1 to 3, wherein the rear section of the sheath body is in interference fit with the coaxial cable and the cooling outer tube respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920870441.5U CN210301208U (en) | 2019-06-11 | 2019-06-11 | True circle water-cooling microwave ablation needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920870441.5U CN210301208U (en) | 2019-06-11 | 2019-06-11 | True circle water-cooling microwave ablation needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210301208U true CN210301208U (en) | 2020-04-14 |
Family
ID=70143082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920870441.5U Expired - Fee Related CN210301208U (en) | 2019-06-11 | 2019-06-11 | True circle water-cooling microwave ablation needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210301208U (en) |
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2019
- 2019-06-11 CN CN201920870441.5U patent/CN210301208U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200414 |
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| CF01 | Termination of patent right due to non-payment of annual fee |