CN212630891U - Microwave ablation catheter used under bronchoscope - Google Patents
Microwave ablation catheter used under bronchoscope Download PDFInfo
- Publication number
- CN212630891U CN212630891U CN202020655074.XU CN202020655074U CN212630891U CN 212630891 U CN212630891 U CN 212630891U CN 202020655074 U CN202020655074 U CN 202020655074U CN 212630891 U CN212630891 U CN 212630891U
- Authority
- CN
- China
- Prior art keywords
- microwave
- catheter
- silica gel
- cavity
- antenna
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Surgical Instruments (AREA)
- Radiation-Therapy Devices (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The utility model relates to a microwave ablation catheter used under a bronchoscope, which belongs to the technical field of medical instruments. Wherein, the microwave ablation catheter comprises a handle, a fixed sheath, a silica gel catheter and a microwave catheter head; the handle comprises a microwave joint, a temperature measuring joint, a water inlet pipe joint and a water outlet pipe joint; the fixing sheath is externally arranged on the silica gel catheter, and the fixing sheath and the silica gel catheter are arranged at the handle end together; the silica gel catheter adopts a multi-cavity metal rubber silica gel tube with shape memory alloy; the microwave catheter head comprises a microwave antenna, an eccentric saccule and a temperature measuring module. The utility model provides a microwave ablation catheter used under a bronchoscope, which is used for performing the ERCP (percutaneous transluminal coronary angioplasty) lower-cavity microwave ablation combined biliary stent implantation operation, and the unobstructed period of a stent and the life cycle of a patient are increased.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to a microwave ablation catheter for under bronchoscope.
Background
Benign and malignant tumors in the airways often cause airway obstruction in different degrees to cause serious dyspnea and complications such as obstructive pulmonary inflammation, and the like, thereby seriously threatening the life of a patient. The traditional surgical treatment has the defects of long operation period, more postoperative complications and the like, seriously influences the life quality of patients and even endangers life. In the last decade, with the comprehensive use of modern advanced device technology, the field of airway intervention has developed rapidly. Partial obstruction cases can be recanalized by ablation techniques in combination with stents, radiation therapy, and the like. This fraction of cases often results in significant therapeutic effects: obviously improve ventilation, relieve dyspnea, improve exercise tolerance, improve life quality and prolong life expectancy. In recent years, with the wide development of airway intervention technology and the continuous application of new technical equipment, the wide development of the interventional technology in the airway and the continuous application of the new technical equipment, the tumor ablation technology in the airway gradually forms a more complete technical series. The bronchoscope interventional ablation technology has the characteristics of simplicity in operation, remarkable curative effect, few adverse reactions and the like, has the advantages of accuracy in positioning, small contact point of a radiation head, easiness in mastering of a cauterization area, safety and the like, is gradually favored by many doctors, and is already used for treating patients with bronchial lesions at home and abroad.
The microwave used clinically is non-ionizing radiation electromagnetic wave, and the action mechanism is that after microwave radiation, electrolyte ions and bound charges in organism tissues rapidly move relatively along with the microwave frequency to absorb microwave energy, so that polar molecules in the tissues are in a high-speed oscillation state. In the process of oscillation, to overcome the viscosity of the medium and the friction between adjacent molecules, microwave energy can be converted into heat energy, which generates high temperatures (up to 65-100 ℃) in the tissue. While high temperatures may cause the tubercle bacillus, granulation and necrotic tissue in the bronchial lesions to coagulate, denature, necrose or vaporize. Thereby expanding the air passage of the patient and accelerating the negative conversion of the sputum. In addition, the temperature of the tissues around the pathological changes is also raised simultaneously, so that the blood vessels are expanded, the blood supply is increased, the absorption of local inflammation and the regeneration and repair of the surrounding tissues are promoted, and the rehabilitation of patients is facilitated. Indications of microwave therapy mainly include airway stenosis, formation of granulation tissue of the airway, hemostasis and the like caused by benign and malignant tumors. In addition, other effects of microwave such as immune anti-inflammatory effect can also enhance phagocytic function of leukocyte, inhibit tumor cell metastasis to far distance, and control inflammatory reaction diffusion.
The existing microwave treatment technology directly contacts a microwave ablation antenna with lesion tissues for ablation, complications such as bronchial wall bleeding and perforation can be caused when microwave ablation treatment is carried out, such as overlarge power, overlong treatment time or overlarge treatment range, and the complications are avoided by controlling the use power and shortening the treatment time as much as possible by an operating doctor in the treatment process at present. Therefore, the risk of perforation and artificial over burning of the bronchial wall in the process of microwave ablation in the airway is avoided, which becomes a technical problem to be solved in clinic.
Disclosure of Invention
An object of the utility model is to provide a microwave ablation catheter for under bronchoscope, the operation is put into to the intracavity microwave ablation joint biliary tract support under going ERCP, increases support unobstructed phase and patient life.
In order to achieve the above purpose, according to the technical scheme provided by the utility model, the microwave ablation catheter used under the bronchoscope comprises a handle, a fixed sheath, a silica gel catheter and a microwave catheter head; the handle comprises a microwave joint, a temperature measuring joint, a water inlet pipe joint and a water outlet pipe joint; the fixing sheath is externally arranged on the silica gel catheter, and the fixing sheath and the silica gel catheter are arranged at the handle end together; the silica gel catheter adopts a multi-cavity catheter with a shape memory alloy metal rubber silica gel tube; the microwave catheter head comprises a microwave antenna, an eccentric saccule and a temperature measuring module.
Preferably, the fixed sheath is fixed at the end, close to the handle, of the silica gel catheter, the fixed sheath is provided with a check valve, the check valve is used as a water injection hole for injecting normal saline, the normal saline reaches the position of the eccentric balloon after being injected into the check valve through the water injection interface, the eccentric balloon expands outwards by taking the microwave antenna as the axial direction and is used for forming an isolation cavity with human tissues when the microwave antenna is heated, and the microwave energy is buffered, so that the treated tissues are heated uniformly;
preferably, the head of the microwave guide pipe is integrally opened by silica gel, and the bending rate can reach 60-180 degrees;
preferably, the microwave antenna adopts a tetrafluoro annular coaxial monopole microwave antenna, the length of the antenna is 10mm, the antenna is excited by a coaxial transmission line, only tangential electric field intensity exists in the antenna, the direction of the field intensity is perpendicular to the radiation antenna, and the radiation electric field of the microwave can be approximately expressed as:
in the formula: eo is the electric field peak value; t is the pulse width; t is t1Pulse rise time and fall time; ƒ0Is the carrier frequency.
Preferably, the high temperature resistance of the silica gel conduit is more than 200 ℃, the high temperature resistance is more than 20% of the temperature of the microwave antenna during heating, the diameter of the conduit is less than 2.5mm, and the length of the conduit is less than 1 meter;
wherein preferably the volume of the eccentric balloon can be up to 20x15 mm.
Preferably, the multi-cavity channel of the silica gel catheter comprises a water inlet cavity, a temperature measuring cavity, a coaxial cable cavity and an eccentric balloon cavity;
further, the water inlet cavity is used for inputting cooling water into the catheter, and the damage to the tissues around the catheter is reduced by reducing the temperature of the catheter;
the temperature measuring cavity is connected with the temperature measuring connector and the temperature measuring module and is used for placing the superfine coaxial cable of the temperature module; the temperature measuring module is arranged at the bottom of the water inlet end of the eccentric balloon and is used for monitoring the heating degree of human tissues;
the coaxial cable cavity is connected with the microwave joint and the microwave antenna, is used for processing a semi-rigid coaxial cable channel used as the antenna, and is also used as a water outlet cavity for outputting cooling water in the guide pipe;
the sacculus cavity is connected with the water injection hole and the eccentric sacculus and is used for inputting normal saline, the normal saline is input to the eccentric sacculus, and the eccentric sacculus is gradually bulged to the periphery along with the increase of the water injection amount.
Compare with prior art, the utility model discloses following beneficial effect has:
1. a microwave ablation catheter used under a bronchoscope for treating benign and malignant airway stenosis has the advantages of small wound, few complications and the like, can effectively eliminate pathological changes, recover the smoothness of an airway and improve the life quality of a patient; for patients with airway lesions which cannot tolerate surgical treatment, microwave ablation treatment through an electronic bronchoscope is a relatively safe and effective method.
2. The utility model provides a microwave ablation catheter for under bronchoscope, its microwave ablation catheter's eccentric sacculus water injection's design, accurate gasbag formula control by temperature change microwave ablation, avoided microwave antenna direct contact focus tissue, rapid heating up after the microwave is opened, to focus tissue ablation temperature too high or time overlength lead to the excessive carbonization of trachea wall and take place fenestrate risk.
3. The utility model provides a temperature measurement module design that is used for microwave ablation pipe under bronchoscope can be more accurate test human tissue's actual temperature to human tissue temperature of real-time supervision prevents that tissue temperature is too high, avoids the misery that the patient produced in the treatment process.
4. A microwave ablation catheter used under a bronchoscope is designed for treating airway obstruction, but not limited to the treatment of the disease, and can also be used for cancer embolism and infarction in esophagus, colon, gastric sinus and bile duct.
Drawings
Fig. 1 is the overall structure schematic diagram of the microwave catheter head after water injection.
Fig. 2 is a schematic view of the head of the microwave catheter after water injection of the eccentric balloon of the microwave catheter head of the utility model.
Fig. 3 is the overall structure schematic diagram of the microwave catheter head eccentric balloon without water injection.
Fig. 4 is a schematic view of the tangent plane structure of the microwave guide tube head of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the microwave ablation catheter for bronchoscopy comprises a handle 1, a fixed sheath 8, a silica gel catheter 2 and a microwave catheter head 3; the handle 1 comprises a microwave connector 4, a temperature measuring connector 5, a water inlet pipe connector 6 and a water outlet pipe connector 7; the fixed sheath 8 is externally arranged on the silica gel catheter 2, and the fixed sheath 8 and the silica gel catheter 2 are arranged at the end of the handle 1 together; the silica gel catheter 2 adopts a multi-cavity metal rubber silica gel tube with shape memory alloy; the microwave guide tube head 3 comprises a microwave antenna 9, an eccentric saccule 10 and a temperature measuring module 11.
The fixed sheath 8 is fixed on the end, close to the handle 1, of the silica gel catheter 2, the fixed sheath 8 is provided with a check valve 12, the check valve 12 is used as a water injection hole for injecting normal saline, the normal saline is injected into the check valve 12 through a water injection interface 13 and then reaches the position of the eccentric balloon 10, the eccentric balloon 10 expands outwards by taking the microwave antenna 9 as the axial direction and is used for forming an isolation cavity with human tissues when the microwave antenna 9 is heated so as to buffer microwave energy and enable the treated tissues to be heated uniformly;
the microwave catheter head 3 is integrally opened by silica gel, the bending rate can reach 60-180 degrees, the microwave ablation catheter reaches the focus position through a bronchoscope during treatment, a proper amount of normal saline is injected through a check valve 12 according to the position condition of the focus, the normal saline flows into an eccentric balloon 10 through an eccentric balloon cavity 17 of the silica gel catheter, the eccentric balloon 10 is expanded, microwave energy is started, the temperature of a transmitting area of a microwave antenna 9 can reach 100 ℃ within 5 seconds, even more than 120 ℃, the microwave energy quickly heats water molecules to ablate the focus of an airway, and the volume of the eccentric balloon 10 after water injection can reach 20x15mm to the maximum.
The microwave antenna 9 adopts a tetrafluoro annular coaxial monopole microwave antenna, the length of the antenna is 10mm, the antenna is excited by a coaxial transmission line, only tangential electric field intensity exists in the antenna, the direction of field intensity is perpendicular to the radiation antenna, the tetrafluoro annular antenna is in vertically symmetrical standing wave distribution, and when ablation treatment is carried out, an ablation range is in outward elliptic distribution along the axial symmetry of the antenna.
The silica gel catheter 2 is made of a medical silica gel tube which is smaller than 2.5mm and is added with a memory alloy material, does not cause foreign body reaction to human tissues, does not cause inflammation to surrounding tissues, and has high temperature resistance higher than 200 ℃ and higher than 20% of the temperature of the microwave antenna during heating;
as shown in fig. 3, for the utility model discloses the overall structure schematic diagram of the eccentric sacculus of microwave catheter head water injection not, for the state when microwave ablation catheter gets into the human body, its eccentric sacculus 10 is in closed state, melts when pouring into liquid and accomplishes the back, can locate to insert the cylinder at check valve 12, with the liquid suction in the eccentric sacculus 10, withdraws from the human body with microwave ablation catheter.
As shown in fig. 4, the multiple lumens of the silica gel catheter 2 include a water inlet lumen 14, a temperature measuring lumen 15, a coaxial cable lumen 16, and an eccentric balloon lumen 17, and the lumens are formed by integrally opening the mold of silica gel;
the water inlet cavity 14 is used for inputting cooling water into the silica gel catheter, and the damage to the surrounding tissues of the catheter is reduced by reducing the temperature of the catheter;
the temperature measuring cavity 15 is connected with the temperature measuring connector 5 and the temperature measuring module 11 and is used for placing an ultrathin coaxial cable of the temperature measuring module; the temperature measuring module 11 is arranged at the bottom of the water inlet end of the eccentric balloon 10 and used for monitoring the heating degree of human tissues, the temperature measuring module enters the human body along with the ablation catheter, and a doctor can judge the process state of the tissue being ablated through temperature so as to control the ablation process and judge the ablation effect;
the coaxial cable cavity 16 is connected with the microwave connector 4 and the microwave antenna 9, is used for processing a semi-rigid coaxial cable channel used as an antenna, and is also used as a water outlet cavity for outputting cooling water in the conduit;
the sacculus cavity 17 is connected with a check valve 12 serving as a water injection hole and the eccentric sacculus 10 and used for inputting normal saline, the normal saline is input to the eccentric sacculus 10, and the eccentric sacculus 10 gradually bulges around along with the increase of water injection amount.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement 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 utility model is subject to the appended claims.
Claims (7)
1. A microwave ablation catheter for use under a bronchoscope, comprising: comprises a handle, a fixed sheath, a silica gel catheter and a microwave catheter head; the handle comprises a microwave joint, a temperature measuring joint, a water inlet pipe joint and a water outlet pipe joint; the fixing sheath is externally arranged on the silica gel catheter, and the fixing sheath and the silica gel catheter are arranged at the handle end together; the silica gel catheter adopts a multi-cavity metal rubber silica gel tube with shape memory alloy; the microwave catheter head comprises a microwave antenna, an eccentric saccule and a temperature measuring module.
2. A microwave ablation catheter according to claim 1, wherein: the fixed sheath is fixed at the end, close to the handle, of the silica gel catheter, the check valve is arranged on the fixed sheath and is used as a water injection hole for injecting physiological saline, the physiological saline reaches the position of the eccentric balloon after being injected into the check valve through the water injection port, and the eccentric balloon expands outwards along the axial direction by using the microwave antenna and is used for forming an isolation cavity with human tissues when the microwave antenna heats so as to buffer microwave energy and enable the treated tissues to be heated uniformly.
3. A microwave ablation catheter according to claim 1, wherein: the head of the microwave guide tube is integrally opened by silica gel, and the bending rate can reach 60-180 degrees.
4. A microwave ablation catheter according to claim 1, wherein: the microwave antenna adopts a tetrafluoro annular coaxial monopole microwave antenna, the length of the antenna is 10mm, the antenna is excited by a coaxial transmission line, only tangential electric field intensity exists in the antenna, and the direction of the field intensity is vertical to the radiation antenna.
5. A microwave ablation catheter according to claim 1, wherein: the silica gel conduit has a high temperature resistance of more than 200 ℃, a high temperature resistance of more than 20% of the temperature of the microwave antenna during heating, a diameter of less than 2.5mm and a length of less than 1 m.
6. A microwave ablation catheter according to claim 1, wherein: the volume of the eccentric balloon can reach 20x15mm at most.
7. A microwave ablation catheter according to claim 1, wherein: the multi-cavity channel of the silica gel catheter comprises a water inlet cavity, a temperature measuring cavity, a coaxial cable cavity and an eccentric balloon cavity;
the water inlet cavity is used for inputting cooling water into the conduit, and the damage to the tissues around the conduit is reduced by reducing the temperature of the conduit;
the temperature measuring cavity is connected with the temperature measuring connector and the temperature measuring module and is used for placing the superfine coaxial cable of the temperature module; the temperature measuring module is arranged at the bottom of the water inlet end of the eccentric balloon and is used for monitoring the heating degree of human tissues;
the coaxial cable cavity is connected with the microwave joint and the microwave antenna, is used for processing a semi-rigid coaxial cable channel used as the antenna, and is also used as a water outlet cavity for outputting cooling water in the guide pipe;
the eccentric sacculus cavity is connected with the water injection hole and the eccentric sacculus and is used for inputting normal saline, the normal saline is input to the eccentric sacculus, and the eccentric sacculus gradually bulges around along with the increase of the water injection amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020655074.XU CN212630891U (en) | 2020-04-27 | 2020-04-27 | Microwave ablation catheter used under bronchoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020655074.XU CN212630891U (en) | 2020-04-27 | 2020-04-27 | Microwave ablation catheter used under bronchoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212630891U true CN212630891U (en) | 2021-03-02 |
Family
ID=74794799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020655074.XU Active CN212630891U (en) | 2020-04-27 | 2020-04-27 | Microwave ablation catheter used under bronchoscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212630891U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117503321A (en) * | 2023-11-20 | 2024-02-06 | 邦士医疗科技股份有限公司 | Slow pulmonary steam ablation balloon catheter that hinders |
-
2020
- 2020-04-27 CN CN202020655074.XU patent/CN212630891U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117503321A (en) * | 2023-11-20 | 2024-02-06 | 邦士医疗科技股份有限公司 | Slow pulmonary steam ablation balloon catheter that hinders |
| CN117503321B (en) * | 2023-11-20 | 2024-05-07 | 邦士医疗科技股份有限公司 | Slow pulmonary steam ablation balloon catheter that hinders |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6009351A (en) | System and method for transurethral heating with rectal cooling | |
| US20040243199A1 (en) | Device and method for treatment of tissue adjacent a bodily conduit by thermocompression | |
| JPH09502630A (en) | Gamma-matched spiral dipole microwave antenna with tubular capacitors | |
| WO1992004934A1 (en) | Combined hyperthermia and dilation catheter | |
| JP2018535066A (en) | Device for electromagnetic ablation of tissue | |
| CN212630891U (en) | Microwave ablation catheter used under bronchoscope | |
| US6064914A (en) | Thermotherapy method | |
| CN106901827A (en) | Urethra temperature preservation control device and method in tumor of prostate cryoablation | |
| CN111358551A (en) | Microwave ablation catheter used under bronchoscope | |
| CN110063789B (en) | Microwave ablation device | |
| CN109602490A (en) | A kind of microwave ablation electrode under bronchoscope | |
| CN108013932A (en) | A kind of interior cooled microwave conduit and system of monitoring temperature in real time | |
| WO2021051542A1 (en) | Multi-slot microwave ablation needle | |
| CN214434331U (en) | Ablation isolation protection device for minimally invasive intervention | |
| CN206403855U (en) | The body canal of Microwave Coagulation water cooling temperature control one for varicose treatment | |
| CN204562386U (en) | For in ablation to the temperature protective device of human body natural's tract | |
| CN2579358Y (en) | Controllable radio frequency cold and heat pole | |
| CN218960904U (en) | Percutaneous transhepatic channel wire guide tube type ablation needle | |
| CN112237452A (en) | Ablation isolation protection device for minimally invasive intervention | |
| CN215914877U (en) | Microwave ablation system with balloon and temperature and pressure measurement functions | |
| CN218009944U (en) | Microwave ablation electrode system with hemostasis function | |
| CN204318900U (en) | Resectoscope plasma bipolar electrode | |
| CN101524576B (en) | Microwave probe for curing varicosis | |
| CN114305673B (en) | Microwave ablation catheter and device for portal vein cancer embolism | |
| CN102697557B (en) | Cervical microwave thermotherapy radiator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 3 / F and 4 / F, J5 science and Technology Industrial Park, Nanjing University of technology, No.15 Wanshou Road, economic development zone, Pukou District, Nanjing, Jiangsu Province, 211800 Patentee after: Nanjing Yigao Medical Technology Co.,Ltd. Address before: 3 / F and 4 / F, J5 science and Technology Industrial Park, Nanjing University of technology, No.15 Wanshou Road, economic development zone, Pukou District, Nanjing, Jiangsu Province, 211800 Patentee before: NANJING ECO MICROWAVE SYSTEM Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |