CN115998414A - Microwave ablation needle used under electromagnetic navigation bronchoscope - Google Patents
Microwave ablation needle used under electromagnetic navigation bronchoscope Download PDFInfo
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- CN115998414A CN115998414A CN202111236434.8A CN202111236434A CN115998414A CN 115998414 A CN115998414 A CN 115998414A CN 202111236434 A CN202111236434 A CN 202111236434A CN 115998414 A CN115998414 A CN 115998414A
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- 238000002679 ablation Methods 0.000 title claims abstract description 38
- 239000010935 stainless steel Substances 0.000 claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 24
- 239000000853 adhesive Substances 0.000 claims abstract description 11
- 230000001070 adhesive effect Effects 0.000 claims abstract description 11
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 239000000498 cooling water Substances 0.000 claims description 5
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000011298 ablation treatment Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract 1
- 238000011282 treatment Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000013153 catheter ablation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 208000031737 Tissue Adhesions Diseases 0.000 description 2
- 238000013276 bronchoscopy Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000001959 radiotherapy Methods 0.000 description 2
- 208000019693 Lung disease Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 238000002512 chemotherapy Methods 0.000 description 1
- 238000003759 clinical diagnosis Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002001 electrophysiology Methods 0.000 description 1
- 230000007831 electrophysiology Effects 0.000 description 1
- 238000009169 immunotherapy Methods 0.000 description 1
- 210000005246 left atrium Anatomy 0.000 description 1
- 230000004199 lung function Effects 0.000 description 1
- 208000037841 lung tumor Diseases 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000005245 right atrium Anatomy 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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Abstract
The invention provides a microwave ablation needle used under an electromagnetic navigation bronchoscope, which relates to the technical field of medical appliances, and comprises the following components: a semi-rigid coaxial cable; ultra-thin wall stainless steel tube; the conical microwave needle head, the tetrafluoro bushing, the head barb bushing and the outer sleeve are sleeved on an inner conductor of the semi-rigid coaxial cable through holes at the tail of the conical microwave needle head for welding fixation, the tetrafluoro bushing is sleeved on the outer diameter of the tail of the conical microwave needle head for fixing by using high-temperature-resistant adhesive, the head barb bushing is sleeved on the tail barb of the head barb bushing for fixing by using high-temperature-resistant adhesive, the back of a bevel notch at the head of the ultrathin-wall stainless steel tube is welded on the inner wall of the head barb bushing, and the ultrathin-wall stainless steel tube and the semi-rigid coaxial cable are parallelly arranged in the outer sleeve; the invention solves the problem that the microwave ablation needle in the prior art cannot be well matched with the bronchioloscope to carry out intracavity ablation treatment.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a microwave ablation needle used under an electromagnetic navigation bronchoscope.
Background
Thermal ablation technology has become one of the important means for tumor treatment following surgery, radiation therapy, chemotherapy, and immunotherapy. The magnetic navigation technology is an advanced electrophysiology auxiliary operation system, the catheter ablation under the guidance of magnetic navigation is a new leap in the technical field of catheter ablation, the catheter ablation can be guided to reach almost any left and right atrium, the operation is accurate and safe, the direction of the magnetic catheter can be changed by the magnetic catheter under the guidance of magnetic navigation, the head of the magnetic catheter can rotate by 360 degrees, more accurate movement is realized, the target can be accurately reached, the accurate mapping of the ablation target point is carried out, the ablation treatment is carried out in a temperature control mode, and the novel choice is provided for the clinical diagnosis and treatment of the patients which cannot tolerate the surgical operation or the local radiotherapy due to the lung function, the basic diseases and the like by combining the electromagnetic navigation bronchoscope with the microwave ablation treatment. With the increasing growth of lung tumors and the development of bronchoscope technology in recent years, the bronchoscope and the superfine bronchoscope applied to clinic can be observed farther than the common bronchoscope, can enter into the 8 th-stage bronchus, have more comprehensive observation range, can acquire cases under direct vision, have working channels, and are gradually applied to diagnosis and treatment of surrounding lung diseases from the clinical examination and diagnosis and treatment. The outer diameter of the bronchiolcope is 2.7-3.8mm, the inner diameter of the working channel is only 1.2-1.7mm, as shown in fig. 1, which is a deflection schematic diagram of a bronchoscope magnetic catheter, and the constraint conditions of the tube diameter and deflection of the bronchiolcope are provided, so that the performance of the microwave ablation catheter under the bronchoscope of the electromagnetic catheter is highly required, namely, the microwave ablation catheter not only needs to have stronger toughness under the given length under the specific diameter constraint, but also needs to have better flexibility for puncture positioning, and can be matched with the electromagnetic navigation bronchoscope to perform multi-angle bending. Meanwhile, on the basis of the small diameter requirement, in order to reduce the heat accumulated by microwave energy transmitted by the microwave ablation catheter, a cold circulation system is required to be arranged, so that the risk of burning caused by overheat conduction of the microwave catheter to contacted normal tissues is prevented.
In the prior art, the method of microwave ablation technology applicable to clinical bronchioloscope is less, so that a thin, long and high-flexibility microwave ablation needle with a water-cooling structure and high flexibility and difficult to break is required to be explored.
Disclosure of Invention
The invention provides a microwave ablation needle for an electromagnetic navigation bronchoscope, which aims to overcome the defects in the prior art.
The implementation mode of the technical scheme of the invention is as follows:
a microwave ablation needle for electromagnetic navigation under bronchoscopy, comprising:
a semi-rigid coaxial cable;
ultra-thin wall stainless steel tube;
conical microwave syringe needle, tetrafluoro bush, head barb bush, outer tube, conical microwave syringe needle afterbody through-hole suit is in welded fastening on the inner conductor of semi-rigid coaxial cable, tetrafluoro bush suit is in conical microwave syringe needle afterbody external diameter is fixed with high temperature resistant adhesive, head barb bush suit is in tetrafluoro bush afterbody external diameter is fixed with high temperature resistant adhesive, the outer tube suit is in it is fixed with high temperature resistant adhesive on the barb of head barb bush afterbody, after the notch on the inclined plane of ultrathin wall stainless steel pipe head, the notch back welded fastening is at head barb bush inner wall, ultrathin wall stainless steel pipe with semi-rigid coaxial cable is parallel to be built-in inside the outer tube.
Further, the taper of the conical microwave needle is less than 30 degrees, and the conical microwave needle is rounded off at one third of the position away from the needle point.
Further, the semi-rigid coaxial cable is stepped stripped at the conical microwave needle.
Further, the ultrathin wall stainless steel tube is provided with a memory alloy, and the diameter of the ultrathin wall stainless steel tube is between 0.4mm and 0.8mm, so that the ultrathin wall stainless steel tube is used for conveying cooling water.
Compared with the prior art, the invention has the following beneficial effects:
1. the conical microwave needle head design of the invention can perform better tissue puncture when the needle head performs human tissue, thereby avoiding the risk that the needle head designed by a pointed ablation needle is too pointed to puncture in place or the direction of the puncture head is difficult to adjust due to tissue adhesion, and avoiding the risk that the puncture resistance of the round head ablation needle head is too large and the ablation needle head is easy to break.
2. The ultra-thin wall stainless steel tube is welded on the needle head device, so that the connection strength of the ablation needle head and the needle body is ensured, the risk of being easily broken between the needle head and the needle body in the puncturing process is reduced, and the flexibility of the ablation needle body is ensured.
3. The invention breaks through the limitations of materials and processes used by the traditional microwave ablation needle, externally places the water cooling circulation outside the coaxial cable, realizes a water cooling circulation system with better effect, can design the outer diameter of the ablation needle as thin as possible, and overcomes the difficulty that the microwave ablation needle in the prior art cannot be well matched with a bronchiolcope to carry out intracavity ablation treatment.
Drawings
Fig. 1 is a schematic diagram of deflection of a bronchoscopic magnetic catheter.
Fig. 2 is a partial cross-sectional view of the front end of a microwave ablation needle for use under an electromagnetic navigation bronchoscope of the present invention.
FIG. 3 is a schematic view of the incision in ultra-thin wall stainless steel tubing of the present invention for use in a microwave ablation needle under an electromagnetic navigation bronchoscope, FIG. 1.
FIG. 4 is a schematic view of the incision in ultra-thin wall stainless steel tubing of a microwave ablation needle for electromagnetic navigation bronchoscopy in accordance with the present invention 2.
Fig. 5 is a schematic diagram of the overall structure of a microwave ablation needle for electromagnetic navigation under a bronchoscope.
Detailed Description
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive improvements, are intended to fall within the scope of the invention.
As shown in fig. 1, the microwave ablation needle of the present embodiment includes: a semi-rigid coaxial cable 1, an ultrathin stainless steel tube 2, a conical microwave needle 3, a tetrafluoro bushing 4, a head barb bushing 5 and an outer sleeve 6.
The conical microwave needle 3 is sleeved on the inner conductor of the semi-rigid coaxial cable 1 in a through hole mode, the taper of the conical microwave needle 3 is smaller than 30 degrees, the round corner rounding treatment is carried out at one third of the position away from the needle point, and the conical microwave needle is designed in a mode that when the needle performs human tissue, better tissue puncture can be carried out, so that the situation that the tip ablation needle is too sharp to puncture the body in place or the direction of the puncture head is difficult to adjust due to tissue adhesion is avoided, and the risk that the puncture resistance of the round head ablation needle is too large and the ablation needle is easy to break is avoided.
The outer diameter of the tail of the conical microwave needle head 3 is sleeved with the polytetrafluoroethylene lining 4 and fixed by the high-temperature-resistant adhesive, the tail of the polytetrafluoroethylene lining 4 is sleeved with the head barb lining 5 and fixed by the high-temperature-resistant adhesive, the outer sleeve 6 is sleeved with the head barb of the head barb lining 5 and fixed by the high-temperature-resistant adhesive, after the notch 7 is formed in the inclined surface of the head of the ultrathin-wall stainless steel tube 4, the back of the notch is welded and fixed on the inner wall of the head barb lining 5, and the ultrathin-wall stainless steel tube 2 and the semi-rigid coaxial cable 1 are parallelly arranged in the outer sleeve 6.
In one embodiment of the present invention, as shown in fig. 3, the ultra-thin wall stainless steel tube 4 may be a head bevel incision, and after the cooling water flows out from the ultra-thin wall stainless steel tube 4, the cooling water flows back from the internal gap of the outer sleeve 6 to form a water cooling circulation system, so as to take away the dielectric loss heat generated by the continuous transmission of microwave energy by the semi-rigid coaxial cable 1, and prevent the risk of burning caused by the conduction of the heat to the contacted normal tissues.
In another embodiment of the present invention, as shown in fig. 4, the ultra-thin wall stainless steel tube 4 may be a head bevel incision, and 2-5 sectional side wall incisions 8 are simultaneously made on the tube wall, wherein the incision mode may be a mechanical mode or a laser perforation mode, and the ultra-thin wall stainless steel tube is provided with a memory alloy, and has a diameter of between 0.4mm and 0.8mm, and is used for conveying cooling water.
According to one embodiment of the invention, as shown in fig. 5, the front end part 9 of the microwave ablation needle is connected with the ablation needle body 10, the tail end of the ablation needle body 10 is provided with the handle 11, the length of the ablation needle body 10 is 1200mm, the handle 11 is internally provided with the water inlet and outlet channel and the semi-rigid coaxial cable 1 connector, and the handle 11 is convenient for a doctor to grasp during surgical ablation.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention thereto. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The protection scope of the present invention is subject to the appended claims.
Claims (3)
1. A microwave ablation needle for use under an electromagnetic navigation bronchoscope, comprising:
a semi-rigid coaxial cable;
ultra-thin wall stainless steel tube;
conical microwave syringe needle, tetrafluoro bush, head barb bush, outer tube, conical microwave syringe needle afterbody through-hole suit is in welded fastening on the inner conductor of semi-rigid coaxial cable, tetrafluoro bush suit is in conical microwave syringe needle afterbody external diameter is fixed with high temperature resistant adhesive, head barb bush suit is in tetrafluoro bush afterbody external diameter is fixed with high temperature resistant adhesive, the outer tube suit is in it is fixed with high temperature resistant adhesive on the barb of head barb bush afterbody, after the notch on the inclined plane of ultrathin wall stainless steel pipe head, the notch back welded fastening is at head barb bush inner wall, ultrathin wall stainless steel pipe with semi-rigid coaxial cable is parallel to be built-in inside the outer tube.
2. The microwave ablation needle according to claim 1, wherein the conical microwave needle tip has a taper of less than 30 degrees and is rounded off one third of the needle tip.
3. The microwave ablation needle according to claim 1, wherein the ultra-thin wall stainless steel tube is provided with 2-5 sectional side wall incisions 8 on the wall of the head, wherein the incisions can be mechanical perforation, laser perforation and the like, and the ultra-thin wall stainless steel tube is provided with a memory alloy with a diameter of 0.4-0.8 mm for cooling water transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236434.8A CN115998414A (en) | 2021-10-23 | 2021-10-23 | Microwave ablation needle used under electromagnetic navigation bronchoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236434.8A CN115998414A (en) | 2021-10-23 | 2021-10-23 | Microwave ablation needle used under electromagnetic navigation bronchoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115998414A true CN115998414A (en) | 2023-04-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111236434.8A Pending CN115998414A (en) | 2021-10-23 | 2021-10-23 | Microwave ablation needle used under electromagnetic navigation bronchoscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115998414A (en) |
-
2021
- 2021-10-23 CN CN202111236434.8A patent/CN115998414A/en active Pending
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Country or region after: China Address after: No. 19 Xinghui Road, Jiangbei New District, Nanjing City, Jiangsu Province, 211899 Applicant after: Nanjing Yigao Medical Technology Co.,Ltd. Applicant after: SUN YAT SEN University CANCER CENTER Address before: 211800 third and fourth floors of J5, science and Technology Industrial Park, Nanjing University of technology, No. 15, Wanshou Road, Nanjing area, China (Jiangsu) pilot Free Trade Zone, Nanjing, Jiangsu Province Applicant before: NANJING ECO MICROWAVE SYSTEM Co.,Ltd. Country or region before: China Applicant before: SUN YAT SEN University CANCER CENTER |