CN209864033U - Microwave ablation needle with water-cooling sleeve applied under bronchofiberscope - Google Patents
Microwave ablation needle with water-cooling sleeve applied under bronchofiberscope Download PDFInfo
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- CN209864033U CN209864033U CN201821606031.1U CN201821606031U CN209864033U CN 209864033 U CN209864033 U CN 209864033U CN 201821606031 U CN201821606031 U CN 201821606031U CN 209864033 U CN209864033 U CN 209864033U
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- bronchofiberscope
- cooling
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Abstract
The utility model discloses a microwave ablation needle with water-cooling sleeve pipe of using under bronchofiberscope, including handle, sheath pipe, seal wire and control mechanism, the handle is equipped with water injection pipe and drainage pipe, and the seal wire includes the cable, melts electrode, water-cooling pipe, sealing member, syringe needle and interior sleeve pipe, and water-cooling pipe front end is equipped with the backward flow mouth, forms water injection chamber and drainage chamber respectively at the inner chamber, and the cable front end is equipped with and melts electrode and syringe needle. The utility model provides a microwave ablation needle with a water-cooling sleeve applied under a bronchofiberscope, which can realize the needle insertion and ablation with controllable distance in a bronchofiberscope channel. The product has excellent water cooling circulation design, and the sealing property and the supporting property in the product are considered in many aspects, so that the microwave treatment emitting high heat can be safely executed in the body of a patient.
Description
Technical Field
The utility model relates to the field of medical equipment, specifically speaking relate to a microwave ablation needle with water-cooling sleeve pipe of using under bronchofiberscope.
Background
The microwave ablation needle is mainly applied to the ablation of solid tumors of a human body for coagulation treatment of tissue; the microwave ablation needle rapidly changes direction along with the alternation of a microwave electric field by utilizing water molecules in a tumor under the action of the microwave electromagnetic field of 2450MHz, overturns at a frequency of over million times per second and mutually rubs and collides to generate a large amount of heat to denaturize and necrose tissues;
at present, common (bile duct, blood vessel, rectum, lung trachea) and other cavity and tract tumors are treated by methods including chemotherapy, radiotherapy, radio frequency ablation and the like, but the effects are poor, and the chemotherapy and the radiotherapy have large side effects on human bodies; the curative effect of the radiofrequency ablation is not obvious and the radiofrequency ablation is easy to transfer, so that a flexible microwave ablation needle with small damage and difficult recurrence and rebound after treatment needs to be developed, and the radiofrequency ablation needle has important market significance. The flexible microwave ablation needle is accurately inserted into the tumor through the cavity channel of imaging equipment such as a bronchofiberscope, a gastroscope and an enteroscope to carry out real-time coagulation treatment.
If a flexible microwave ablation needle is developed, the inside of a tumor needs to be accessed through a bronchofiberscope device, and the temperature of a catheter needs to be controlled so as not to cause damage to an imaging device due to high temperature; traditional cooling design can not satisfy its flexibility, fine product characteristics, if adopt water-cooling circulation design, the sealed effect of circulating water and the reliability of product are the technical bottleneck that present field technical personnel are difficult to solve.
Disclosure of Invention
The purpose of the invention is as follows: the utility model aims at providing a microwave ablation needle with circulating water cooling, it can be used to the microwave ablation treatment under the bronchofiberscope.
The technical scheme is as follows: in order to achieve the above object, the present invention provides a microwave ablation needle with a water-cooling sleeve applied under bronchofiberscope, which comprises a handle, a sheath tube and a guide wire arranged in the sheath tube, wherein the handle is provided with a control mechanism connected with the guide wire and controlling the guide wire to move back and forth relative to the sheath tube;
the handle comprises a shell, a water injection conduit and a water drainage conduit which are connected with the shell; the guide wire comprises a cable, an ablation electrode, a water-cooling catheter, a sealing element, a needle head and an inner sleeve, the rear end of the cable is connected to the handle and contained in the inner sleeve, the front end of the inner sleeve is fixedly connected with the sealing element, and the front part of the cable is sleeved with the sealing element, so that a closed circulating inner cavity is formed among the cable, the sealing element and the inner sleeve; the water-cooling guide pipe is sleeved outside the cable, the circulating inner cavity is divided into a water injection cavity communicated with the water injection guide pipe and a water drainage cavity communicated with the water drainage guide pipe, and the front end of the water-cooling guide pipe is provided with a backflow port for communicating the water injection cavity with the water drainage cavity; the front end of the cable is provided with an ablation electrode and a needle head.
The utility model discloses the shape style of handle is not limited, control mechanism is connected with the seal wire, makes the seal wire for sheath pipe back and forth movement in certain distance within range control mechanism's form includes but not limited to any one of handle, knob or button, and this control mechanism extensively is arranged in traditional bronchofiberscope device, sheath pipe and handle casing fixed connection, the material that the sheath pipe chooseed for use includes but not limited to any one of temperature resistant such as tetrafluoroethylene PTFE, PET, PVC, PEEK, and the preferred 1.0 ~ 5.0.0 mm of sheath pipe diameter is in addition, the utility model discloses an use the scene including but not limited to the bronchofiberscope, can intervene and form working channel's product and all can use like gastroscope, enteroscope etc. the utility model discloses a microwave ablation needle.
The utility model discloses give the water-cooling pipe and cut apart the water injection chamber and the drainage chamber that form and connect water injection pipe and drainage pipe respectively, constantly pour into low-temperature cooling water into under the effect of hydraulic drive device (like the peristaltic pump), the cooling water after the heat exchange of discharging. Because the cooling water directly exchanges heat with the surface of the cable from the periphery, the heat exchange efficiency is improved. The utility model discloses it is inboard that preferred water injection chamber is located the water-cooling pipe, and the drainage chamber is located the outside of water-cooling pipe to guarantee that heat exchange efficiency is highest.
The water-cooling pipe is provided with one or more backflow ports, the shapes of the backflow ports include, but are not limited to, circular, rectangular, slit-shaped and irregular shapes, and preferably, the backflow ports are spiral notches formed in the front end of the cooling pipe. The helical slot may be one or more helical formations. The design of the spiral notch realizes the backflow of cooling water in the direction of 360 degrees at the front end of the cooling pipe, and is favorable for improving the heat exchange effect. It is worth noting that the spiral notch still have another important use to realize this section position bending under certain angle, this kink is corresponding for the flexion with the bronchofiberscope front end to the crooked direction of cooperation bronchofiberscope enters into the focus district and treats. The flexible design ensures smooth backflow of cooling water, adjusts the needle head puncture direction of the ablation needle and increases the head toughness.
The utility model discloses from the angle of product assembly process and leakproofness, optimize sealing member sealed effect and with other subassembly compatibilities key. The sealing element comprises an annular main body, a first slot is formed in the rear end of the annular main body, and the inner sleeve is in airtight fit with the first slot.
The form of the airtight fit between the first slot and the inner sleeve is not limited, and any one of welding, interference fit and viscose glue connection can be adopted. As a preferred scheme, the first slot is located on the outer surface of the annular main body, the inner surface of the rear end of the annular main body is provided with a second slot, a plug welding pipe is accommodated in the second slot, and the plug welding pipe is sleeved on the outer side of the cable. The front end of the inner sleeve is fixedly connected with the sealing element, specifically, the front end of the inner sleeve is inserted into the first slot to realize the fixed connection, and is preferably fixed by using viscose glue, and the front end of the inner sleeve is used for realizing the fixed matching between the sealing element and the inner sleeve; the second slot holds the plug welding pipe, mainly plays the effect of support and sealing connection, forms fixed cooperation between sealing member and the cable.
Further, the plug welding pipe extends backwards to form an extension part, and the extension part is fixedly connected with the inner surface of the water cooling guide pipe. Certain gaps are reserved between the front end of the water-cooling guide pipe and the plug welding pipe extension part and between the front end of the water-cooling guide pipe and the inner sleeve pipe to ensure that cooling water passes through, and the distance between the plug welding pipe extension part and the inner sleeve pipe is larger than the pipe wall thickness of the water-cooling guide pipe, so that a good supporting effect is achieved.
Furthermore, the cable is a coaxial cable, and the ablation electrode comprises an electrode terminal connected with the inner core of the coaxial cable and an insulating bush sleeved on the outer side of the electrode terminal.
Furthermore, a third slot is formed in the inner surface of the front end of the sealing element, a head steel pipe is arranged in the third slot, and the head steel pipe is sleeved outside the cable. The front end of the head steel pipe receives part of the insulating bush and forms interference fit. The head steel tube is used for supporting the puncture needle, and the front end of the head steel tube is not in direct contact with the electrode terminal.
The utility model discloses an interior sleeve pipe, sealing member, head steel pipe and syringe needle are a whole, but it is relative motion for the sheath pipe. In order to prevent the needle from damaging the front end of the sheath tube when the needle moves relative to the sheath tube, a head clamping sleeve made of a metal material is arranged on the inner side of the front end of the sheath tube, and the head clamping sleeve is sleeved on the outer side of the head steel tube.
The head cutting ferrule can also realize the control of the needle inserting distance except the function of protecting the front end of the sheath tube so as to prevent the puncture from influencing the safety of the operation too deeply. When the guide wire is positioned at the front end limit distance relative to the sheath tube, the front end surface of the sealing element abuts against the rear end of the head clamping sleeve; the needle forward end is received within the sheath when the guidewire is at a rear end limit distance relative to the sheath. In order to further optimize the control of the rear end limit distance, the limit of the handle control mechanism can be realized.
Insulating bush for the bush that the tetrafluoroethylene material was made, insulating bush bonds fixedly with the head steel pipe.
Preferably, the length of the needle head is 2 ~ 5cm, a scale mark is arranged on the surface of the needle head every 0.5cm, and the needle insertion distance of the device can be estimated by an operator according to the state of the scale mark exposed outside the sheath.
The utility model discloses microwave ablation needle's operating procedure:
1) inserting a microwave ablation needle into a working channel of equipment such as a bronchofiberscope, a gastroscope and an enteroscope, and inserting the ablation needle into a specific tumor region under the operation of imaging equipment;
2) setting corresponding treatment parameters for treatment according to the size of the tumor, and starting a water cooling circulation system;
3) and after the treatment is finished, the microwave ablation needle is taken out from the working channel.
The water cooling circulation of the microwave ablation needle of the utility model is that the water pressure is transmitted to the needle head of the ablation needle for cooling under the high pressure of the peristaltic pump, thus ensuring the reliable temperature of the catheter outside the treatment area; in order to ensure the safety of the operation, the temperature of the cooling liquid is required to be less than 35 ℃.
Has the advantages that: the utility model provides a microwave ablation needle with a water-cooling sleeve applied under a bronchofiberscope, which can realize the needle insertion and ablation with controllable distance in a bronchofiberscope channel. The front end of the cooling water pipe of the product is connected with the needle head into a whole, so that the puncture strength of the ablation needle is improved; the microwave therapeutic apparatus has an excellent water cooling circulation design, and the sealing property and the supporting property of the interior of the product are considered in many aspects so as to ensure that the microwave therapy which emits high heat can be safely executed in the body of a patient.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an enlarged schematic view of section A of FIG. 1;
FIG. 3 is an enlarged schematic view of section A1 of FIG. 2;
FIG. 4 is an enlarged schematic view of section A2 of FIG. 2;
FIG. 5 is an enlarged schematic view of section A3 of FIG. 2;
FIG. 6 is an enlarged schematic view of B in FIG. 5;
fig. 7 is an external view of the front end of the water-cooled duct.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Example 1
As shown in figures 1 and 2, the microwave ablation needle with the water-cooling sleeve for the bronchofiberscope comprises a handle 100, a sheath 200 and a guide wire 300 arranged in the sheath 200, wherein the handle 100 comprises a shell 110, a water injection catheter 120 connected with the shell 110, a water drainage catheter 130 and a control mechanism 140, the handle 100 is provided with the control mechanism 140 which is connected with the guide wire 300 and controls the guide wire 300 to move back and forth relative to the sheath 200, the control mechanism 140 is connected with the guide wire 300, so that the guide wire 300 can move back and forth relative to the sheath 200 within a certain distance range, the sheath 200 is made of any one of PTFE, PET, PVC and PEEK, and the diameter of the sheath 200 is 1.0 ~ 5.0.0 mm.
As shown in fig. 3 to 5, the guide wire 300 includes a coaxial cable 310, a water-cooled catheter 320, a sealing element 330, a needle 340, an inner sleeve 350, and an ablation electrode 360, wherein the rear end of the coaxial cable 310 is connected to the handle 100 and is accommodated in the inner sleeve 350, the front end of the inner sleeve 350 is fixedly connected with the sealing element 330, and the sealing element 330 is sleeved on the front portion of the coaxial cable 310, so that a closed circulation lumen is formed among the coaxial cable 310, the sealing element 330, and the inner sleeve 350; the water-cooling conduit 320 is sleeved outside the coaxial cable 310, and divides the circulating inner cavity into a water injection cavity 302 communicated with the water injection conduit 120 and a water drainage cavity 304 communicated with the water drainage conduit 130, and the front end of the water-cooling conduit 320 is provided with a return port 322 for communicating the water injection cavity 302 with the water drainage cavity 304; the front end of the coaxial cable 310 is provided with an ablation electrode 360 and a needle 340.
As shown in fig. 6 and 7, the return port 322 of the water-cooling duct 320 is a spiral notch opened at the front end of the cooling pipe, and this design realizes the return of the cooling water in the direction of 360 ° at the front end of the cooling pipe, which is beneficial to improving the heat exchange effect. After the product is inserted into the bronchofiberscope channel, the position of the spiral notch corresponds to the bending part at the front end of the bronchofiberscope, so that the bronchofiberscope is matched with the bending part to be guided to enter a focus area for treatment.
Referring to fig. 3 to 5, the sealing effect of the sealing member 330 and the compatibility with other components are optimized from the perspective of the product assembling process and the sealing performance of the present invention. The sealing member 330 includes an annular body 332, a first slot 334 is formed at the rear end of the annular body 332, and a sealing fit is formed between the inner sleeve 350 and the first slot 334. The first insertion groove 334 is located on the outer surface of the annular main body 332, the second insertion groove 336 is formed on the inner surface of the rear end of the annular main body 332, the plug welding pipe 370 is accommodated in the second insertion groove 336, and the plug welding pipe 370 is sleeved on the outer side of the coaxial cable 310. The front end of the inner sleeve 350 is fixedly connected with the sealing element 330, and in particular, is inserted into the first slot 334 to be fixedly connected, preferably fixed by glue, and is used for fixedly matching the sealing element 330 with the inner sleeve 350; the second socket 336 receives a plug weld tube 370, which primarily functions to support and seal the connection, forming a secure fit between the seal 330 and the coaxial cable 310.
The plug welded tube 370 extends rearward to form an extension 372, and the extension 372 is fixedly attached to the inner surface of the water cooled conduit 320. Certain gaps are reserved between the front end of the water-cooling guide pipe 320 and the plug welding pipe extending part 372 and between the front end of the water-cooling guide pipe 320 and the inner sleeve 350 to ensure that cooling water passes through, and the distance between the plug welding pipe extending part 372 and the inner sleeve 350 is larger than the pipe wall thickness of the water-cooling guide pipe 320, so that a good supporting effect is achieved.
The ablation electrode 360 includes an electrode terminal 362 connected to the inner core of the coaxial cable 310, and a tetrafluoroethylene insulating sleeve 364 disposed outside the electrode terminal 362. The inner surface of the front end of the sealing element 330 is provided with a third slot 338, a head steel tube 366 is arranged in the third slot 338, and the head steel tube 366 is sleeved outside the coaxial cable 310. Head steel tube 366 receives a portion of insulation sleeve 364 at the front end and forms an interference fit. The head steel pipe 366 functions to support the puncture needle while the front end should not be in direct contact with the electrode terminal 362.
The inner cannula 350, the sealing member 330, the head steel tube 366 and the needle 340 of the present invention are a single unit which is movable relative to the sheath 200. In order to prevent the needle 340 from damaging the front end of the sheath 200 when the two move relatively, a head ferrule 380 made of a metal material is installed on the inner side of the front end of the sheath 200, and the head ferrule 380 is sleeved on the outer side of the head steel tube 366. The head clamp sleeve 380 of the utility model can also realize the control of the needle insertion distance except the function of protecting the front end of the sheath tube 200, so as to ensure the needle insertion safety. When the guide wire 300 is located at the front end limit distance relative to the sheath 200, the front end surface of the sealing member 330 abuts against the rear end of the head clamping sleeve 380; when the guidewire 300 is positioned at a rear-end limit distance relative to the sheath 200, the needle 340 is contained at the front end within the sheath 200.
The length of the needle head is 2 ~ 5cm, a scale mark is arranged on the surface of the needle head every 0.5cm, and the needle insertion distance of the device can be estimated by an operator according to the state of the scale mark exposed outside the sheath.
The microwave ablation needle of the embodiment comprises the following operation steps:
1) inserting a microwave ablation needle into a working channel of equipment such as a bronchofiberscope, a gastroscope and an enteroscope, and inserting the ablation needle into a specific tumor region under the operation of imaging equipment;
2) setting corresponding treatment parameters for treatment according to the size of the tumor, and starting a water cooling circulation system;
3) and after the treatment is finished, the microwave ablation needle is taken out from the working channel.
The above description is only a preferred embodiment of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a microwave that has water-cooling sleeve pipe that uses under bronchofiberscope melts needle, includes handle, sheath pipe and locates the intraductal seal wire of sheath, the handle is equipped with and is connected and control the relative sheath pipe back and forth movement's of seal wire control mechanism, its characterized in that with the seal wire:
the handle comprises a shell, a water injection conduit and a water drainage conduit which are connected with the shell;
the guide wire comprises a cable, an ablation electrode, a water-cooling catheter, a sealing element, a needle head and an inner sleeve, the rear end of the cable is connected to the handle and contained in the inner sleeve, the front end of the inner sleeve is fixedly connected with the sealing element, and the front part of the cable is sleeved with the sealing element, so that a closed circulating inner cavity is formed among the cable, the sealing element and the inner sleeve; the water-cooling guide pipe is sleeved outside the cable, the circulating inner cavity is divided into a water injection cavity communicated with the water injection guide pipe and a water drainage cavity communicated with the water drainage guide pipe, and the front end of the water-cooling guide pipe is provided with a backflow port for communicating the water injection cavity with the water drainage cavity; the front end of the cable is provided with an ablation electrode and a needle head.
2. The microwave ablation needle with the water-cooled sleeve applied under a bronchofiberscope according to claim 1, characterized in that: the sealing element comprises an annular main body, a first slot is formed in the rear end of the annular main body, and the inner sleeve is in airtight fit with the first slot.
3. The microwave ablation needle with the water-cooled sleeve for the sub-bronchofiberscope application according to claim 2, characterized in that: the first slot is located the surface of annular main part, the second slot has been seted up to annular main part rear end internal surface, it has the plug welding pipe to hold in the second slot, the plug welding pipe box is located the cable outside.
4. The microwave ablation needle with the water-cooled sleeve applied under a bronchofiberscope according to claim 3, characterized in that: the plug welding pipe extends backwards to form an extension part, and the extension part is fixedly connected with the inner surface of the water-cooling guide pipe.
5. The microwave ablation needle with the water-cooled sleeve applied under a bronchofiberscope according to claim 1, characterized in that: the cable is a coaxial cable, and the ablation electrode comprises an electrode terminal connected with the inner core of the coaxial cable and an insulating bush sleeved on the outer side of the electrode terminal.
6. The microwave ablation needle with the water-cooled sleeve applied under the bronchofiberscope according to claim 5, characterized in that: a third slot is formed in the inner surface of the front end of the sealing element, a head steel pipe is arranged in the third slot, and the head steel pipe is sleeved outside the cable; the front end of the head steel pipe receives part of the insulation bushing and forms interference fit.
7. The microwave ablation needle with the water-cooled sleeve for the sub-bronchofiberscope application of claim 6, wherein: the head clamping sleeve made of metal materials is installed on the inner side of the front end of the sheath tube, and the outer side of the head steel tube is sleeved with the head clamping sleeve.
8. The microwave ablation needle with water-cooled sleeve for the sub-bronchofiberscope application of claim 7, wherein: when the guide wire is positioned at the front end limit distance relative to the sheath tube, the front end surface of the sealing element abuts against the rear end of the head clamping sleeve; the needle forward end is received within the sheath when the guidewire is at a rear end limit distance relative to the sheath.
9. The microwave ablation needle with the water-cooled sleeve applied under a bronchofiberscope according to claim 1, characterized in that: the backflow port is a spiral notch formed in the front end of the cooling pipe.
10. The microwave ablation needle with the water-cooled sleeve applied under the bronchofiberscope according to claim 5, characterized in that: the insulating bush is a tetrafluoroethylene bush, and the insulating bush is fixedly bonded with the head steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821606031.1U CN209864033U (en) | 2018-09-29 | 2018-09-29 | Microwave ablation needle with water-cooling sleeve applied under bronchofiberscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821606031.1U CN209864033U (en) | 2018-09-29 | 2018-09-29 | Microwave ablation needle with water-cooling sleeve applied under bronchofiberscope |
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| Publication Number | Publication Date |
|---|---|
| CN209864033U true CN209864033U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821606031.1U Active CN209864033U (en) | 2018-09-29 | 2018-09-29 | Microwave ablation needle with water-cooling sleeve applied under bronchofiberscope |
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| CN (1) | CN209864033U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109247984A (en) * | 2018-09-29 | 2019-01-22 | 南京亿高微波系统工程有限公司 | A kind of microwave melt needle with water cold sleeve applied under Bronchofiberscope |
-
2018
- 2018-09-29 CN CN201821606031.1U patent/CN209864033U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109247984A (en) * | 2018-09-29 | 2019-01-22 | 南京亿高微波系统工程有限公司 | A kind of microwave melt needle with water cold sleeve applied under Bronchofiberscope |
| CN109247984B (en) * | 2018-09-29 | 2024-01-12 | 南京亿高医疗科技股份有限公司 | Microwave ablation needle with water-cooling sleeve applied under bronchofiberscope |
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| GR01 | Patent grant | ||
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Address after: The third and fourth floors of J5, Nanjing University of Technology Industrial Park, No. 15, Wanshou Road, Pukou District, Nanjing, Jiangsu 210,000 Patentee after: Nanjing Yigao Medical Technology Co.,Ltd. Address before: The third and fourth floors of J5, Nanjing University of Technology Industrial Park, No. 15, Wanshou Road, Pukou District, Nanjing, Jiangsu 210,000 Patentee before: NANJING ECO MICROWAVE SYSTEM Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |