CN201098472Y - Energy-cumulating microwave ablation needle used for 915MHZ - Google Patents
Energy-cumulating microwave ablation needle used for 915MHZ Download PDFInfo
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- CN201098472Y CN201098472Y CN 200720043374 CN200720043374U CN201098472Y CN 201098472 Y CN201098472 Y CN 201098472Y CN 200720043374 CN200720043374 CN 200720043374 CN 200720043374 U CN200720043374 U CN 200720043374U CN 201098472 Y CN201098472 Y CN 201098472Y
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- needle
- melt
- microwave
- handle
- ablation
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Abstract
The utility model discloses a microwave ablation needle for 915 MHz binding energy, which relates to a disposable therapeutic instrument which mainly comprises an ablation needle head, an ablation needle tube and a handle; the tail of the handle is provided with a fixed mount and a socket for external connection; a coaxial cable connector and a connection terminal are arranged on the fixed mount; the ablation needle tube is provided with a microwave coaxial cable and a stainless capillary; a temperature sensor is arranged on the end seal of the ablation needle tube; a connection terminal for connecting the temperature sensor is arranged on the fixed mount; a water inlet and a water outlet are arranged on the fixed mount of the handle tail; the water outlet is communicated with the ablation needle tube. The microwave ablation needle of the utility model is used for the ablation treatment of tumors and lesion tissues, operates under the condition of 915 MHz microwave, has good microwave impedance match, large ablation scope and small coking scope of coagulation areas around the ablation needle and can be used for the ablation treatment of large tumors and tissues with large lesion scope.
Description
Technical field
This utility model relates to a kind of one-time treatment apparatus, relates in particular to a kind of 915MHz cumulative microwave melt needle that is used for the microwave thermal ablation of direct implantation tumour and pathological tissues.
Background technology
Development along with the medical image technology, under image-guided, microwave ablation treatment tumor has been a kind of new Therapeutic Method of oncotherapy, it is under image (ultrasonic, CT etc.) guiding, the micro-wave therapeutic pin is accurately inserted in body tumor tissue or the pathological tissues, tumor is carried out thermal ablation therapy.In above-mentioned therapeutic process, the ablation needle frequency of utilization all is 2450MHz at present, the microwave wavelength 12.24cm of 2540MHz, penetration depth in moisture tissue can only arrive 1.7cm, for big tumor treatment simultaneously many pins insert, so easy increase is to the wound of therapentic part tissue and treat the risk of bringing.
The microwave of 2450MHz is in the ablation process, because the frequency of oscillation height, energy is too concentrated, so ablation needle surrounding tissue coking district is big, the increase in coking district can hinder the radiation of microwave, makes ablation range not reach due volume.
Summary of the invention
This utility model provides a kind of cumulative microwave melt needle that uses in the tumour ablation treating process.
This utility model adopts following technical scheme:
A kind of cumulative microwave melt needle that is used for the microwave thermal ablation of tumor and pathological tissues, by melting syringe needle, melting needle tubing and handle forms, be provided with the insulator medium melting syringe needle and melt between the end of needle tubing, the other end that melts needle tubing is connected with the head of handle, be provided with the end envelope in this other end end of melting needle tubing, and the end envelope is positioned at handle, afterbody at handle is provided with fixed mount and is used for the outside socket that is connected, on the fixed mount of handle afterbody, be provided with coaxial cable connector and be used to connect the splicing ear of temperature sensor, above-mentioned melt to be provided with in the needle tubing be used to connect the microwave coaxial cable that melts syringe needle and water inlet stainless steel capillary, the microwave coaxial cable that melts in the needle tubing passes the end envelope, and be connected with coaxial cable connector on the handle afterbody fixed mount, seal up at end and to be provided with temperature sensor, on the fixed mount of handle afterbody, be provided with the splicing ear that is used to connect temperature sensor, on handle afterbody fixed mount, be provided with water inlet and outlet, water inlet is communicated with stainless steel capillary with water inlet, outlet with melt needle tubing and be communicated with.
Cumulative microwave melt needle of the present utility model, frequency of utilization are 915MHz, and the microwave wavelength of 915MHz is 32.79cm, penetration depth in moisture group reaches 3.04cm, melting syringe needle is the microwave radiating portion, and its length is 19～41mm, and melting the syringe needle external diameter is 1.6～4mm.The ablation needle of different length launched microwave in tumor tissues, can satisfy a microwave melt needle and just can melt tumor greater than 3cm, and can effectively reduce ablation needle coking district scope on every side, according to different tumor sizes, the tumor conformal shape that adjusting energy and the length of time reach different shape is melted, and satisfies clinical various treatment requirement.The microwave transmitting antenna that cumulative microwave melt needle of the present utility model is 915MHz, it passes on connection, Inlet and outlet water to the temperature survey of shank, microwave and connects and be installed in the handle integratedly.Melting syringe needle and melting the insulator medium that is provided with between the end of needle tubing can be tetrafluoro insulator medium.Stainless steel capillary can be many.
Compared with prior art, the utlity model has following advantage:
Cumulative microwave melt needle of the present utility model is organized interior wavelength according to the wavelength of 915MHz microwave at free space, and penetration depth is designed to 1.6～4mm to the spoke side external diameter of ablation needle, melts the length 19～41mm of syringe needle.The microwave impedance matching of the ablation needle of this size and 915MHz is good, and ablation range is big, and the solidification zone coking scope around the pin is little.Can be used for melting big tumor treatment and the big tissue of extent of disease.Test comparison diagram as can be seen from the stripped Hepar Sus domestica ablation effect of Fig. 5: be output as 70 watts at power, under the equal experiment condition of 900 seconds action time, the 915MHz microwave ablation area effect of left figure is 80 * 50mm; And the 2450MHz microwave ablation area effect of right figure is 45 * 30mm.Obviously it is bigger to melt area under the microwave action of 915MHz, and therapeutic effect is good.Again from the live body Hepar Sus domestica ablation effect of Fig. 6 experiment comparison diagram as can be seen: left side figure is 915MHz microwave, 50 watts, 900 seconds condition, it melts area and is about 50 * 25mm, right figure is 2450MHz microwave, 70 watts, 900 seconds condition, and it melts area and left figure quite is about 45 * 20mm.Obviously under the microwave action of 915MHz, even the power of effect is less, it is also bigger to melt area, and therapeutic effect is good.
The cold circulation stainless steel capillary 6 of the liquid of ablation needle adopts two-tube water inlet, can effectively take away the heat that microwave coaxial cable 5 produces in the ablation process like this.Can reduce the carbonization scope that melts the center on the one hand, enlarge the scope of zone of ablation effectively; The temperature that reduces shank on the other hand makes on the puncture needle track is not burnt.The temperature that can change shank simultaneously again by the flow of regulating cooling liquid prevents needle track implantation, and stainless steel capillary 6 also can adopt the multitube draining.
Description of drawings
Fig. 1 is a structure cutaway view of the present utility model;
Fig. 2 is a structure chart of the present utility model;
Fig. 3 is a syringe needle enlarged drawing of the present utility model;
Fig. 4 is a handgrip sectional view of the present utility model;
Fig. 5 is the Hepar Sus domestica ablation effect experiment comparison diagram that exsomatizes;
Fig. 6 is a live body Hepar Sus domestica ablation effect experiment comparison diagram.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment this utility model is described in further detail.
915MHz cumulative microwave melt needle, by melting syringe needle 1, melt needle tubing 3 and handle 10 compositions, be provided with insulator medium 2 between the needle tubing 3 melting syringe needle 1 and melt, the other end that melts needle tubing 3 passes the head of handle 10, be provided with end envelope 4 in this end end, and end envelope 4 is positioned at handle 10, afterbody at handle 10 is provided with fixed mount 11 and is used for the outside socket that is connected, on the fixed mount 11 of handle 10 afterbodys, be provided with coaxial fitting 9 and be used to connect the splicing ear 7 and 8 of temperature sensor, above-mentioned melt to be provided with in the needle tubing 3 be used to connect the microwave coaxial cable that melts syringe needle 1 and water inlet with two stainless steel capillaries, the microwave coaxial cable that melts in the needle tubing 3 passes end envelope 4, and be connected with coaxial cable connector 9 on the handle 10 afterbody fixed mounts 11, on end envelope 4, be provided with temperature sensor, be provided with the terminal 7 that is used to be connected temperature sensor with the fixed mount 11 of handle 10 afterbodys, 8 connect, on handle 10 afterbody fixed mounts 11, be provided with water inlet 6 and outlet 5, water inlet 6 is communicated with two stainless steel capillaries with water inlet, outlet 5 with melt needle tubing 3 and be communicated with.On the outer surface that melts needle tubing 3, be provided with graduation mark 12, melting on the needle tubing 3, put the positioning sleeve 13 that is used to locate the ablation needle insertion depth.
With reference to Fig. 1, Fig. 2, the end envelope 4 that melts needle tubing 3 ends adopts metal column, the fixed mount 11 of handle 10 afterbodys, be threaded with handle 10, above-mentioned water inlet 6, outlet 5, splicing ear 7,8 and coaxial cable connector 9 all be located on the fixed mount 11, water inlet 6 and outlet 5 respectively by water inlet pipe and outlet pipe with stainless steel capillary with melt needle tubing 3 and be communicated with, cooling water enters stainless steel capillary by water inlet 6, return outlet 5 by melting needle tubing 3 again, water inlet pipe and outlet pipe all pass the metal column as ablation needle pipe end envelope 4, the said temperature pick off is contained on the metal column of holding envelope 4 and between water inlet pipe and outlet pipe, and critesistor or other temperature-sensitive element are adopted in temperature sensor.
Microwave energy passes to through coaxial cable connector 9 and melts syringe needle 1 emission, and cooling water flows into two stainless steel capillaries that melt in the needle tubing 3 through water inlet pipe 6, is flowed out by outlet pipe 5 again.Guarantee that the ablation needle temperature satisfies the different requirements of treatment.Pick off is fixed on the centre of metal styletable envelope 4, water inlet pipe 6 and outlet pipe 5, and the shank temperature Accuracy Error that instrument demonstrates in therapeutic process like this is in 1 ℃.The diameter range that melts syringe needle is 1.6mm～4mm, and the length range of ablation needle is 19mm～41mm.
Claims (8)
1, a kind of cumulative microwave melt needle that is used for 915MHz, by melting syringe needle (1), melting needle tubing (3) and handle (10) forms, be provided with insulator medium (2) melting syringe needle (1) and melt between the end of needle tubing (3), melt the other end and the head that passes handle (10) of needle tubing (3), be provided with end envelope (4) in this other end end of melting needle tubing (3) and hold envelope (4) to be positioned at handle (10), afterbody at handle (10) is provided with fixed mount (11) and is used for the outside socket that is connected, on the fixed mount (11) of handle (10) afterbody, be provided with coaxial cable connector (9) and be used to connect the splicing ear (7 of temperature sensor, 8), above-mentioned melt to be provided with in the needle tubing (3) be used for connecting microwave coaxial cable and the water inlet stainless steel capillary melt syringe needle (1), the microwave coaxial cable that melts in the needle tubing (3) passes end envelope (4), and be connected with coaxial cable connector (9) on handle (10) the afterbody fixed mount (11), it is characterized in that on end envelope (4), being provided with temperature sensor, on the fixed mount (11) of handle (10) afterbody, be provided with the splicing ear (7 that is used to connect temperature sensor, 8), on handle (10) afterbody fixed mount (11), be provided with water inlet (6) and outlet (5), water inlet (6) is communicated with stainless steel capillary with water inlet, outlet (5) with melt needle tubing (3) and be communicated with.
2, the cumulative microwave melt needle that is used for 915MHz according to claim 1, it is characterized in that described melt to be provided with in the needle tubing (3) be used to into that the quantity of the stainless steel capillary of water is one or more.
3, the cumulative microwave melt needle that is used for 915MHz according to claim 1 and 2 is characterized in that described insulator medium (2) is a tetrafluoro insulator medium.
4, the cumulative microwave melt needle that is used for 915MHz according to claim 1 and 2 is characterized in that being provided with graduation mark (12) on the outer surface that melts needle tubing (3).
5, the cumulative microwave melt needle that is used for 915MHz according to claim 1 and 2 is characterized in that being arranged with the positioning sleeve (13) that is used to locate the ablation needle insertion depth on the needle tubing (3) melting.
6, the cumulative microwave melt needle that is used for 915MHz according to claim 1 and 2 is characterized in that temperature sensor is between water inlet pipe and outlet pipe.
7, the cumulative microwave melt needle that is used for 915MHz according to claim 1 and 2 is characterized in that described to melt syringe needle (1) external diameter be 1.6～4 millimeters.
8, the cumulative microwave melt needle that is used for 915MHz according to claim 1 and 2 is characterized in that described to melt syringe needle (1) length be 19～41 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720043374 CN201098472Y (en) | 2007-10-30 | 2007-10-30 | Energy-cumulating microwave ablation needle used for 915MHZ |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720043374 CN201098472Y (en) | 2007-10-30 | 2007-10-30 | Energy-cumulating microwave ablation needle used for 915MHZ |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201098472Y true CN201098472Y (en) | 2008-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720043374 Expired - Lifetime CN201098472Y (en) | 2007-10-30 | 2007-10-30 | Energy-cumulating microwave ablation needle used for 915MHZ |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201098472Y (en) |
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2007
- 2007-10-30 CN CN 200720043374 patent/CN201098472Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100853 Fuxing Road, Beijing, Haidian District, No. 28 Patentee after: General Hospital of Chinese PLA Patentee after: Nanjing Kang You medical science and technology company limited Address before: 100853 Fuxing Road, Beijing, Haidian District, No. 28 Patentee before: General Hospital of Chinese PLA Patentee before: Nanjing Kangyou Microwave Application Institute |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080813 |