CN101711705A - Microwave ablation needle and microwave ablation therapeutic apparatus thereof - Google Patents
Microwave ablation needle and microwave ablation therapeutic apparatus thereof Download PDFInfo
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- CN101711705A CN101711705A CN200910234273A CN200910234273A CN101711705A CN 101711705 A CN101711705 A CN 101711705A CN 200910234273 A CN200910234273 A CN 200910234273A CN 200910234273 A CN200910234273 A CN 200910234273A CN 101711705 A CN101711705 A CN 101711705A
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Abstract
The invention discloses a microwave ablation needle and a microwave ablation therapeutic apparatus thereof, and relates to a structure of the microwave ablation needle and the microwave ablation therapeutic apparatus using the microwave ablation needle. The microwave ablation needle mainly comprises an ablation needle, an ablation needle tube, a microwave coaxial cable, a capillary, a handle with a crank, a temperature sensor, a fixed frame, a high-frequency joint and a water cavity, wherein the fixed frame comprises the high-frequency joint, a water inlet joint, a water outlet joint and the temperature sensor and is connected with a terminal external socket; the high-frequency joint comprises a lock card reed; and the water cavity used for circulating cold water is arranged in the handle. The circulating water enters the capillary from the water inlet joint, then enters the water cavity from the ablation needle tube, and finally flows out from the water outlet joint. The microwave energy enters the microwave coaxial cable from the high-frequency joint, and radiates through the ablation needle. The microwave ablation needle, a microwave power source and a computer control unit form the microwave ablation therapeutic apparatus. The microwave ablation needle and the microwave ablation therapeutic apparatus are mainly used for treating tumor through microwave ablation.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, the microwave ablation therapeutic equipment that relates in particular to a kind of structure of microwave melt needle and contain this kind microwave melt needle.
Background technology
Microwave ablation treatment be a kind of to tumor tissues have efficiently, quick, even heating, thermocoagulation Therapeutic Method thorough, easy to use, safe, be widely used in clinical for many years.Along with clinical deepening continuously, clinical requirement for microwave melt needle (antenna for radiating microwave) is also more and more higher.When using microwave melt needle to insert the tumor tissues treatment, clinically wish that microwave melt needle is more and more thinner, so that when when puncture, the damage of tissues such as the blood vessel on the puncture path, nerve being reached minimum; The microwave power of wishing the microwave melt needle carrying is big as much as possible, makes ablation areas big as much as possible, and form is regular as much as possible circular, reaches excellent curative.The microwave melt needle external diameter of pipe that is used at present puncture for treating tumour both at home and abroad is generally less than 2.2mm.The microwave transmission part of microwave melt needle is made up of rigid coaxial cable and high-frequency joint, and rigid coaxial cable is made up of the plastic insulating layer between metal outer conductor (shielding action), metal inner wire (Transmission Microwave effect) and internal and external conductor.The terminal high-frequency joint (the treatment line that high-frequency joint is used for exporting with the microwave power of microwave ablation therapeutic equipment is connected) that connects of rigid coaxial cable, the rigid coaxial cable front end is peelled off one section metal outer conductor, stay plastic insulating layer and metal inner wire between internal and external conductor, the metal inner wire connects the needle point of microwave melt needle, and needle point is the microwave radiation end.Because the needle point of the microwave melt needle that the rigid coaxial cable front end connects is not subjected to the shielding of metal outer conductor, so microwave energy radiate thus, and tumor has absorbed microwave, can produce the elevated temperature heat consolidation, with tumor cell thermocoagulation deactivation.Yet the sectional area of rigid coaxial cable is directly proportional with the microwave energy that it can carry, and under the certain situation of microwave frequency (as: 915MHz), the energy that microwave melt needle is exported to tumor tissues is many more, and the coagulable scope of organization is big more.Therefore want to strengthen heat and coagulate the diameter that the scope of tumor must increase coaxial cable.Facts have proved when the diameter of coaxial cable reaches 5-6mm, coaxial cable Transmission Microwave power can reach 80-100W, under this power rating, heated 10-15 minute, microwave can reach 4-5cm to the thermocoagulation scope diameter of tumor tissues, such ablation range is that domestic and international clinicist looks forward to, but use the microwave melt needle of making as the thick coaxial cable of chopsticks to carry out clinical puncture, with inevitably can be to the blood vessel in the puncture path, neural or other tissue causes serious injury, the probability that the histoorgan massive hemorrhage takes place can increase, thereby has increased the complexity and the danger of operation technique.Therefore the home and abroad is used the microwave melt needle of diameter less than 2.2mm mostly at present, when its coaxial cable is forced to increase the conduction output, can cause electric current excessive and generate heat, cause transmission power loss, and may burn coaxial cable, even cause the coaxial cable normal surrounding tissue to be scalded.
In the prior art, adopt recirculated water cooling microwave coaxial cable.Application for a patent for invention as the applicant: application number is 200710134471.1 " the cumulative microwave melt needle that is used for 915MHz ", applying date 2007.10.30, publication number CN101224137, open day 2008.07.23.And the applicant's application for a patent for invention: application number is 200710165479.4 " temperature control microwave melt needle ", applying date 2007.10.29, publication number CN101156804A, open day 2008.4.9.As shown in Figure 1, fixed mount 9 is provided with water inlet joint 5.1, outlet joint 4.1, high-frequency joint 3.2, temperature sensor splicing ear 8.2 and 8.3.The handle 10 of ablation needle adopts thread connecting mode with the fixed mount of its afterbody 9.Water inlet joint 5.1 and outlet joint 4.1 respectively by the water inlet pipe in the handle 10 and outlet pipe and stainless steel capillary with melt needle tubing 6 and be communicated with, cooling water enters stainless steel capillary by water inlet 5.1, return outlet joint 4.1 by melting needle tubing 6 again, water inlet pipe and outlet pipe all pass the metal column as ablation needle pipe end envelope 7.Fixed mount 9 and ablation needle handle 10 dock melting on the direction of needle tubing orthoscopic.Prior art discloses the technology of employing recirculated water cooling needle tubing (coaxial cable).Though prior art has solved the problem of the big microwave power of Thin cable carrying to a certain extent,, Transmission Microwave power also has the high-frequency joint part except rigid coaxial cable is arranged.In actual use, when the high-frequency joint part can occur forcing to increase the conduction output equally, cause electric current excessive and generate heat, cause transmission power loss, and heating will cause handle 10 constantly to heat up and then have influence on the hand-held ablation needle handle of operative doctor.
In Fig. 2 microwave ablation therapeutic equipment circuit block diagram, the transmission of microwave power is by being connected the micro-wave therapeutic line between microwave power source 12 and the microwave melt needle 13, and the micro-wave therapeutic line is a coaxial cable, and it is heavier relatively and harder.In the prior art, microwave melt needle is to adopt the orthoscopic docking mode to be connected with the micro-wave therapeutic line, and promptly the direction of microwave ablation needle tubing is consistent with the direction of micro-wave therapeutic line and water inlet pipe and water outlet pipe.In operation process, microwave melt needle and micro-wave therapeutic line make micro-wave therapeutic line and water inlet pipe and water outlet pipe have uncertainty to the stress that microwave melt needle produces on direction in the connected mode of handle end, had a strong impact on the difficulty of operation doctor puncture, and the doctor prevents that microwave melt needle is shifted by the influence of micro-wave therapeutic line iso-stress in the therapeutic process, must spend very big energy to remove to help micro-wave therapeutic line and microwave melt needle.
Existing card-locked type high-frequency joint is based on the consideration and the accepted standard part of manufacturing cost, all be microwave power output lead (micro-wave therapeutic line) side that the insertion end of flexible reed is installed in microwave ablation therapeutic equipment, do not have the end that is inserted into of elastic spring to be installed in microwave melt needle one side.Because the micro-wave therapeutic line is connected with therapeutic instrument, and it needs to reuse, and microwave melt needle generally is disposable use in the seance process.High-frequency joint on the microwave melt needle, the frequency of utilization of its plug operation is much smaller than the operation of micro-wave therapeutic wire terminal, and the insertion end of flexible reed is the parts of relatively easy fatigue and damage, so this structure has increased the fault rate of this junction greatly, also shortened micro-wave therapeutic line service life.
Application number is 200810024956.X's " microwave power source and microwave ablation therapeutic equipment thereof " application for a patent for invention, applying date 2008.05.20, and publication number CN101283926, an open day 2008.10.15 is the applicant's application for a patent for invention.Wherein, microwave ablation therapeutic equipment includes microwave power source 12, computer control unit 14, microwave melt needle 13.Microwave melt needle 13 microwave radiation energies are used for the ablation of tumor and pathological tissues, the power output of computer control unit 14 regulating and controlling microwave power sources 12.In this application file, do not disclose the structure of relevant microwave melt needle.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of microwave melt needle and microwave ablation therapeutic equipment thereof are provided.
Above-mentioned purpose of the present invention is realized by following technical scheme:
Microwave melt needle includes: melt syringe needle 1, insulator medium 2, melt needle tubing 6, ingredient such as handle 10, positioning sleeve 11, graduation mark 17, its microwave melt needle inside also includes: capillary tube 5.2, microwave coaxial cable 3.1, water cavity 7, temperature sensor 8.1, fixed mount 9, and the parts such as splicing ear 8.2,8.3 of the high-frequency joint on the fixed mount 9 3.2, water inlet joint 5.1, outlet joint 4.1, temperature sensor 8.1.
Microwave coaxial cable 3.1 and capillary tube 5.2 are positioned at and melt needle tubing 6, and water cavity 7 is positioned at handle 10.Insulator medium 2 is melting syringe needle 1 and is melting between the front end of needle tubing 6, and the end that melts needle tubing 6 runs through the head of handle 10, and is communicated with water cavity 7 heads in the handle 10.The front end of microwave coaxial cable 3.1 run through insulator medium 2 and with melt syringe needle 1 and be connected, its end extends in the water cavity 7 in the handle 10, and is connected with high-frequency joint 3.2 on the fixed mount 9, the first half of high-frequency joint 3.2 is in the water cavity 7.Capillary tube 5.2 runs through and melts needle tubing 6, and its end extends in the water cavity 7 in the handle 10, and is connected with water inlet joint 5.1 on the fixed mount 9.Outlet joint 4.1 communicates with water cavity 7 afterbodys.Water cavity 7 is a closed housing, has three ports: one communicates with melting needle tubing 6, for cooling water by melting the port that needle tubing 6 flows into water cavities 7; It two communicates with water inlet joint 5.1, is the water inlet of cooling water; It three communicates with outlet joint 4.1, is the outlet of cooling water.
The afterbody of handle 10 becomes to have certain included angle A with handle 10 main bodys, promptly outsidely on the fixed mount 9 connects drawing the pipeline direction and melting the needle tubing 6 directions A that forms an angle of socket, and this angle can be between 90 °～150 °.Temperature sensor 8.1 is connected with splicing ear 8.2,8.3.High-frequency joint 3.2 places water cavity 7 with the junction point that extends into microwave coaxial cable 3.1 ends of water cavity 7, and high-frequency joint 3.2 is the card-locked type high-frequency joints with elastic spring 3.3.
Microwave ablation therapeutic equipment includes computer control unit 14, microwave power source 12.The power output of microwave power source 12 connects microwave melt needle of the present invention, and microwave melt needle microwave radiation energy, computer control unit 14 are regulated the power output of controlled microwave power source 12.The splicing ear 8.2,8.3 of the temperature sensor 8.1 on the microwave melt needle connects computer control unit 14, the operating temperature of water cavity 7 in the computer control unit 14 monitoring microwave melt needles.
Compared with prior art, the present invention has following advantage:
1, microwave melt needle further improves the microwave power that is carried when equal diameter, makes that the ablated tumor scope of organization enlarges, and reaches better therapeutic effect in the treatment neoplastic process.
Compared with prior art, in handle 10, be provided with a water cavity 7, make microwave transmission partly include: whole microwave coaxial cables 3.1, microwave coaxial cable 3.1 all is among the recirculated cooling water with the coupling part of high-frequency joint 3.2 and the first half of high-frequency joint 3.2.Recirculated water is entered by water inlet joint 5.1, through the end of capillary tube 5.2 front end to capillary tube 5.2, sputter water quench side by side microwave coaxial cable 3.1 mutually with it melting needle tubing inner capillary tube 5.2, recirculated water is again by the head of ablation needle pipe flow intake antrum 7, last recirculated water flows to outlet joint 4.1 by the afterbody of water cavity 7, finishes the whole circulation process.Cooling water in the ablation needle all is in recurrent state, has solved the heat dissipation problem of each high-frequency unit effectively.Make have water cavity 7 microwave melt needle compared with prior art, under equal operating temperature, can carry bigger microwave output power.Make the ablated tumor scope of organization enlarge, reduced the temperature of ablation needle handle duration of work simultaneously, make doctor's handgrip part more comfortable, thereby reach better therapeutic effect.
2, microwave melt needle is convenient to grip, and has reduced the operation easier of microwave melt needle.
High-frequency joint 3.2, water inlet joint 5.1 and outlet joint 4.1 all are positioned at the below (by direction shown in Figure 4) of microwave melt needle handle 10 ends, when using microwave melt needle to dock with respective lines, micro-wave therapeutic line and water inlet pipe and water outlet pipe etc. are sagging naturally, its stress that microwave melt needle is produced is relative definite on direction and size, being convenient to operator grips, make the puncture of microwave melt needle more accurate, pin is firm in the intravital position of patient in the therapeutic process; Allow operator that the curative effect that more energy is used for patient is assessed, reduced the treatment risk of shaking and being shifted and bringing because of microwave melt needle in the therapeutic process greatly.Remove above-mentioned advantage when operating under the CT guiding, this kind mode also can make gantry of the convenient turnover CT of microwave melt needle, has made things convenient for doctor's operation.
3, improved the reliability that the micro-wave therapeutic line is connected with microwave melt needle.
The high-frequency joint 3.2 of flexible reed 3.3 is installed on microwave melt needle one side, rather than be installed in microwave and control line one side, like this, for in general being disposable microwave melt needle, be to destroy by the Biohazard Waste laws and regulations requirement after using, the access times of its plug are limited, elastic spring 3.3 indefatigability or distortion on it, and this will significantly reduce fault rate that microwave melt needle is connected with the micro-wave therapeutic line and the service life that has prolonged the micro-wave therapeutic line.
Description of drawings
Fig. 1 is microwave ablation needle construction cutaway view and the handle sectional view in the application for a patent for invention 200710134471.1;
Fig. 2 is a microwave ablation therapeutic equipment circuit block diagram of the present invention;
Fig. 3 is a microwave melt needle perspective view of the present invention;
Fig. 4 is a microwave melt needle vertical section structure sketch map of the present invention;
Fig. 5 is a microwave melt needle handle side sectional view of the present invention;
Fig. 6 is two of a microwave melt needle perspective view of the present invention;
Fig. 7 is a card-locked type high-frequency joint of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail.
Shown in Fig. 3 microwave melt needle perspective view of the present invention, from surface structure, microwave melt needle by melt syringe needle 1, dielectric 2, water inlet pipe 5, outlet pipe 4, melt needle tubing 6, handle 10, positioning sleeve 11, graduation mark 17 form.Melting syringe needle 1 external diameter is 1.4～4mm, and length is 3～41mm.Melt syringe needle 1 and melt between the front end of needle tubing 6 and be provided with dielectric 2, dielectric 2 can be the tetrafluoro insulant, and the end that melts needle tubing 6 penetrates the head of handle 10.Positioning sleeve 11 is used for demarcating and spacing microwave melt needle inserts the intravital degree of depth.Melt and have anti-stick coating and graduation mark 17 on the needle tubing 6, graduation mark 17 can be used to refer to and melt measuring of needle tubing 6 length.Handle 10 is the undergo surgery position of treatment operation of hand-held microwave ablation needle.The recirculated water of cooling usefulness is entered into through handle 10 by water inlet pipe 5 and melts needle tubing 6, returns through handle 10 again and is flowed out by outlet pipe 4.
Shown in Fig. 4 microwave melt needle vertical section structure of the present invention sketch map, shown in Fig. 5 microwave melt needle handle side of the present invention sectional view, microwave coaxial cable 3.1 and capillary tube 5.2 are arranged in microwave ablation needle tubing 6, water cavity 7 is arranged in handle 10, fixed mount 9 is arranged in the afterbody side of handle 10.On fixed mount 9, be penetrated with the socket that is used for joint outer part, include water inlet joint 5.1, outlet joint 4.1, be used to connect the splicing ear 8.2,8.3 and the high-frequency joint 3.2 of temperature sensor.Lateral fixed mount 9 of handle 10 afterbodys and handle 10 be A in an angle, just the pipeline that microwave melt needle connect with melt needle tubing 6 directions and become included angle A, included angle A shown in Fig. 3 is 90 °, angle generally can be between 90 °～150 °, the handle 10 that has such angle, relatively being convenient to the staff grips with hands when operation, the pipeline (micro-wave therapeutic line, water inlet pipe and water outlet pipe etc.) that microwave melt needle connect simultaneously is sagging naturally, make pipeline stable to the stress intensity that microwave melt needle produces, stress direction is constant, is convenient to the staff more and operates accurately and stably.
The front end inner core of microwave coaxial cable 3.1 adopts crimping or welding procedure to be connected on to melt on the syringe needle 1, and end passes insulator medium 2 and extends to and melt in the needle tubing 6, extends in the water cavity 7 by melting needle tubing 6, is connected with high-frequency joint 3.2.When work, the recirculated water cooling that part microwave coaxial cable 3.1 in melting needle tubing 6 is sputtered by capillary tube 5.2, part microwave coaxial cable 3.1 in water cavity 7 is cooled off by the recirculated water in the water cavity 7, microwave coaxial cable 3.1 also is in the water cavity 7 with the junction of high-frequency joint 3.2, and the recirculated water cooling is arranged during work all the time.Microwave coaxial cable 3.1 is generally hard coaxial microwave line, is used for the Transmission Microwave energy.High-frequency joint 3.2 is the card-locked type coaxial fitting, has elastic spring 3.3 on it, locking patch plug when being used for joining with the micro-wave therapeutic line.As shown in Figure 7, the insertion end that has elastic spring 3.3 in the card-locked type coaxial fitting is a male plug, elastic spring 3.3 belongs to the fatiguability parts, is generally on the disposable microwave melt needle so be installed in, and does not have the female of elastic spring to be installed in nonexpondable micro-wave therapeutic line one side.
The end that melts needle tubing 6 enters in the handle 10 and is communicated with the head of water cavity 7.Water inlet joint 5.1 upper ends are positioned at water cavity 7 bottom chamber body walls, the lower end is run through fixed mount 9 and is gone out with water supply hose 5.3 to join, upper end and capillary tube 5.2 ends of water inlet joint 5.1 in water cavity 7 join, the front end of capillary tube 5.2 extends water cavity 7 and enters and melt in the needle tubing 6, with microwave coaxial cable 3.1 side by side.The quantity of capillary tube 5.2 is one or more.Capillary tube 5.2 is generally stainless steel material and makes.Outlet joint 4.1 upper ends are positioned at water cavity 7 bottom chamber body walls, and the lower end is run through fixed mount 9 and gone out with delivery hose 4.3 to join, and upper end and bend pipe 4.2 one ends of outlet joint 4.1 in water cavity 7 join, and bend pipe 4.2 ends extend to water cavity 7 afterbodys.When work, water cavity 7 internal cooling water flow into by melting the junction of needle tubing 6 with water cavity 7 heads, by bend pipe 4.2 terminal outflows, thereby make the cooling water in the water cavity 7 be full of water cavity 7 all the time, and be in recurrent state, microwave coaxial cable in the water cavity 7 and high-frequency joint are all the time among the cooling circulating water.
In the prior art of Fig. 1, the microwave coaxial cable between end envelope 7 that melts needle tubing 6 and high-frequency joint 3.2, owing to there is not the corresponding measure of heat radiation, temperature is higher during use, becomes the bottleneck that improves the microwave melt needle load power.Compared with prior art, the present invention is owing to set up water cavity 7 these structures in the handle 10 of microwave melt needle, make the microwave component (microwave coaxial cable 3.1, high-frequency joint 3.2 and their junction) that institute might generate heat in the microwave melt needle all be among the recirculated cooling water, reduced the temperature of high-frequency unit when working effectively.
Microwave ablation therapeutic equipment of the present invention is that the application number the applicant is on " microwave power source and microwave ablation therapeutic equipment thereof " application for a patent for invention basis of 200810024956.X, adopts microwave melt needle of the present invention to constitute.As shown in Figure 2, include computer control unit 14, microwave power source 12.The power output of microwave power source 12 connects microwave melt needle of the present invention by the micro-wave therapeutic line, the microwave melt needle microwave radiation energy, and tumor absorbs microwave, produces the elevated temperature heat consolidation, with tumor cell thermocoagulation deactivation.Computer control unit 14 is regulated the power output of controlled microwave power source 12, and is controlled with the output that reaches microwave melt needle.The splicing ear 8.2,8.3 of the temperature sensor 8.1 on the microwave melt needle connects computer control unit 14, the operating temperature of water cavity 7 in the computer control unit 14 monitoring microwave melt needles.
Claims (7)
1. microwave melt needle, by melt syringe needle (1), melt needle tubing (6), handle (10) and fixed mount (9) form;
In melting needle tubing (6), be provided with and be used for connecting microwave coaxial cable (3.1) that melts syringe needle (1) and the capillary tube (5.2) of intaking usefulness;
Afterbody at handle (10) is provided with fixed mount (9) and is used for the outside socket that is connected, and its outside socket that connects has high-frequency joint (3.2), water inlet joint (5.1) and outlet joint (4.1);
Melt the front end of needle tubing (6) and melt and be provided with insulator medium (2) between the syringe needle (1), the end that melts needle tubing (6) runs through the head of handle (10), microwave coaxial cable (3.1) runs through and melts needle tubing (6), its front end with melt syringe needle (1) and be connected, end extends into handle (10), capillary tube (5.2) runs through and melts needle tubing (6), and its end extends in the handle (10);
The end of the microwave coaxial cable (3.1) that the high-frequency joint (3.2) on the fixed mount (9) is interior with extending into handle (10) is connected, and the water inlet joint (5.1) on the fixed mount (9) is connected with capillary tube (5.2) end that extends in the handle (10);
It is characterized in that: be provided with water cavity (7) in handle (10), the end that melts needle tubing (6) runs through the head of handle (10), and with handle (10) in water cavity (7) head be communicated with; The end of capillary tube (5.2) extends in the water cavity (7) in the handle (10), and is connected with water inlet joint (5.1) on the fixed mount (9); Outlet joint (4.1) on the fixed mount (9) communicates with water cavity (7) afterbody; The end of microwave coaxial cable (3.1) extends in the water cavity (7) in the handle (10), and is connected with high-frequency joint (3.2) on the fixed mount (9), and the first half of high-frequency joint (3.2) is in the water cavity (7).
2. microwave melt needle according to claim 1, it is characterized in that: the afterbody of described handle (10) becomes to have certain included angle (A) with handle (10) main body, and promptly fixed mount (9) is gone up outside the drawing the pipeline direction and melting needle tubing (6) direction form an angle (A) of socket that connect.
3. microwave melt needle according to claim 2 is characterized in that: the afterbody of described handle (10) becomes 90 ° of angles (A) with handle (10) main body.
4. according to the described microwave melt needle of one of claim 1 to 3, it is characterized in that: described high-frequency joint (3.2) is a card-locked type high-frequency joint with elastic spring (3.3), when it connects the micro-wave therapeutic line of microwave ablation therapeutic equipment, the coupling part that elastic spring (3.3) kayser firmly is mated.
5. according to the described microwave melt needle of one of claim 1 to 3, it is characterized in that: the wall of described water cavity (7) is provided with temperature sensor (8.1), and fixed mount (9) is provided with the splicing ear (8.2,8.3) that is used to connect temperature sensor (8.1).
6. the microwave ablation therapeutic equipment that has the described microwave melt needle of one of claim 1 to 5 includes computer control unit (14), microwave power source (12);
The power output that it is characterized in that microwave power source (12) connects described microwave melt needle, and described microwave melt needle microwave radiation energy, computer control unit (14) are regulated the power output of controlled microwave power source (12).
7. microwave ablation therapeutic equipment according to claim 6, it is characterized in that, the splicing ear of the temperature sensor on the described microwave melt needle (8.1) (8.2,8.3) connects computer control unit (14), the operating temperature of water cavity (7) in computer control unit (14) the monitoring microwave melt needle.
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