CN203122599U

CN203122599U - Semi-rigidity water-cooling microwave ablation antenna

Info

Publication number: CN203122599U
Application number: CN 201320144928
Authority: CN
Inventors: 杨兴瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-27
Filing date: 2013-03-27
Publication date: 2013-08-14
Anticipated expiration: 2023-03-27

Abstract

The utility model discloses a semi-rigidity water-cooling microwave ablation antenna, comprising a radiation head, a medium pipe, a semi-rigid coaxial cable, an outer guide sleeve and a water cavity sleeve, wherein the outer guide sleeve is sleeved on the tail part of the medium pipe; the water cavity sleeve is fixed on the rear end of the outer guide sleeve; an outer conductor of the semi-rigid coaxial cable penetrates through an axis hole of the outer guide sleeve along the axial direction; the outer guide sleeve and the water cavity sleeve form a cavity which is used for water heat exchange; at least three small holes are formed in the end face at the tail part of the water cavity sleeve; the front ends of capillary tubes, the number of which is identical with that of the small holes, are respectively welded with the small holes; the capillary tubes are distributed on the periphery of the outer conductor of the semi-rigid coaxial cable; the tail end of at least one capillary tube is connected with a cooling water inlet of the ablation antenna; the tail ends of the remaining capillary tubes are connected with water outlets of the ablation antenna; the semi-rigid coaxial cable and the capillary tubes are wrapped into a whole through a thermoplastic tube; and the water inlet capillary tube, the water outlet capillary tubes and the water heat exchange cavity form a cooling water loop in an antenna body. According to the semi-rigidity water-cooling microwave ablation antenna, low-temperature water which flows unidirectionally is used for cooling a high heat structural component at the front end of the antenna, and meanwhile microwave ablation region heat and microwave transmission cable heat are transferred to the outside in time, so that the semi-rigidity water-cooling microwave ablation antenna can be more safely and reliably applied to clinical operation such as cavity ducts, intestinal tracts and blood vessels.

Description

Half firm water-cooled microwave ablation antenna

Technical field

This utility model relates to a kind of medical apparatus and instruments of microwave ablation treatment, belongs to the medical microwave technical applications.

Background technology

Entered since 21 century, the microwave ablation tumor has developed a kind of main means that become in the clinical cancer therapy rapidly, it can implement the original position deactivation to tumor under the guiding of modern images such as B ultrasonic or CT, and has Wicresoft, accurate, the efficient and little distinguishing feature that has no side effect.Because temperature height in fast, the tumor of microwave ablation tumor programming rate, ablation range are big, be subjected to carbonization and blood flow to influence outstanding advantages such as little, particularly to bringing into play more and more important effect in the entity tumor treatment greatly, the popularity rate of clinical practice is also more and more higher at entity tumor.

In recent years, microwave ablation treatment operation also had been extended to medical courses in general such as tract, intestinal, blood vessel and heart clinical of various big hospital rapidly, for example microwave ablation varicosis etc.But there is following defective in existing microwave ablation operating theater instruments:

1 common water-cooled microwave ablation antenna is rigid needle, can not be crooked, do not fit into the clinical operation of above-mentioned medical courses in general.

2 existing half just microwave ablation antennas, structure is too simple, has defective, so that hindered the microwave ablation treatment the applying of above-mentioned medical courses in general field, its analysis of causes is as follows:

As everyone knows, the operating theater instruments of microwave ablation is the microwave antenna of a needle-like, and it can directly get involved the lesion tissue in the human body, and microwave radiation energy causes it to produce heat, heats up, and reaches the purpose of ablation.The energy of microwave ablation, be by microwave power source electric energy to be changed into microwave energy, by coaxial cable energy delivery is arrived the front end of needle-like operating theater instruments then, microwave energy penetrates from its front end position spoke (sending out) and goes, why be referred to as the microwave ablation antenna, be because it had both had the function of ablation, have structure and the characteristic thereof of typical microwave transmitting antenna again.

The energy transmission line of microwave ablation equipment generally comprises two parts: a part is to see, and is called half gentle type coaxial wire, and its end is connecting microwave power source, and an end is connecting the microwave ablation operating theater instruments.Another section be can't see, and it is contained in the inside of rigidity shank or other protective materials, is half firm type coaxial cable, and it is also softer, is easy to flexural deformation.Though material and the structure of two kinds of cables are different, the basic structure of forming radio frequency (high frequency) coaxial cable will have outer conductor, inner wire and insulating medium layer between the two.

In the process of microwave transmission, because high frequency (alternation) effect of electric field produces polarization and conductive effect in insulating medium layer, cause the loss of microwave energy, be referred to as dielectric loss, taking the form of of its dielectric loss is transformed into heat energy (amount) with microwave energy.This physical phenomenon when personnel connect the coaxial wire of usefulness near microwave ablation equipment, just can be felt its temperature.Under the state of microwave transmission, be in indoor coaxial wire, the heat of its dielectric loss can be by producing convection current with room air, discharge, generally when heat production and heat radiation tend to balance, the temperature of cable epidermis can reach more than 45-50 ℃, and the height of its surface temperature is relevant with the performance of coaxial cable, material and fabricating quality thereof, and is relevant with size, the length of time of transmission microwave power.Can find also that in addition higher in the temperature of the connecting portion of the connecting portion of coaxial wire and microwave power source and coaxial wire and operating theater instruments, this is because the voltage standing wave(VSW) at two positions is bigger, the cause that contact resistance is bigger.In like manner, get involved in the half just coaxial cable in the microwave ablation operating theater instruments of containing in the human body, short then several centimeters, ten several centimeters, long then tens of centimetre, its dielectric loss heat, and along with the continuous transmission of microwave energy, and the heat that accumulates, will form very high temperature, perhaps product is provided with thermal insulation layer, but inevitably, this heat can only conduct the normal structure that contacts to ablating device (hot condenser), as organs such as tract, intestinal, blood vessels, it is apparent then existing the serious risk of burning.This brings puzzlement to operative doctor, when exceeding patient physiological to the regulative mechanism voluntarily of temperature, will cause accident surgery simultaneously.

More than, existing exactly microwave ablation antenna can not normally be promoted and the essence defective of using and guardian technique problem clinically above-mentioned.

On December 31st, 2011, the 5.9th " hot condenser surface temperature " regulation among the pharmaceuticals industry standard YY0838-2011 " microwave thermal is coagulated equipment " that country promulgates: " intervention heat coagulates the hot condenser of equipment and the temperature of normal structure contact portion is no more than 45 ℃ ".Being classified as microwave thermal just with this " hot condenser surface temperature " and coagulate the examination item of device product quality, is the technical specification with rejection property.Implementation date is on June 1st, 2013.

The utility model content

Key technical problem to be solved in the utility model is: overcome the technological deficiency of above-mentioned existing product, propose a kind of half firm water-cooled microwave ablation antenna.

This utility model half is water-cooled microwave ablation antenna just, comprise: radiation head, medium tube, half firm coaxial cable, described medium tube is assemblied on the afterbody cylinder of radiation head, described half firm inner conductor has been packed into, and radiation head afterbody cylinder blind hole is interior also fixes, it is characterized in that: comprise that also encapsulation is at the outer bush of medium tube afterbody, be fixed on the water cavity cover of outer bush rear end, described half firm coaxial cable outer conductor passes from the axle center hole of outer bush vertically, described outer bush rear end and water cavity cover are formed the cavity that is used for carrying out hydrothermal exchange, tail end face at the water cavity cover offers three apertures at least, the front end capillaceous that equates with little number of perforations welds with aperture respectively, described capillary tube be distributed in half just coaxial cable outer conductor around, wherein have at least the tail end of a capillary to link to each other with the water inlet tap that melts antenna, all the other rear ends capillaceous link to each other with the faucet that melts antenna.

This utility model cools off the front end of antenna hyperpyrexia by unidirectional recirculated cooling water stream, and in time shifts heat, reduces the temperature of antenna head in the use.

This utility model further improves and is:

1, the centering collar that also has half coaxial cable axially spaced-apart setting just, described centering collar are distributed on capillary tube around the half firm coaxial cable, by thermoplastic tube capillary tube and half firm coaxial cable are fixed between the adjacent centering collar.

2, the oversheath pipe front end of antenna is fixed on the outer bush by dead ring.

3, the front end of outer bush is the metal thin-wall tubulose, described thin-wall metal pipe is set in outside the medium tube, described medium tube cylindrical is provided with annular groove, and the corresponding position of the thin-wall metal pipe of outer bush is out of shape by pressing realizes being fastenedly connected of outer bush and medium tube in the groove that is pressed into described medium tube cylindrical.

4, will half firm inner conductor and radiation head afterbody cylinder blind hole firm welding by high-temperature soldering.

5, fill high temperature resistant adhesive between radiation head afterbody cylinder and the medium tube endoporus.

6, the end section of antenna comprises: T shape spacer, support, radio frequency contact pin connector, faucet, water inlet tap, Hough formula handle body, pommel and handle tail, described T shape spacer is assemblied in and melts half just on coaxial cable and the capillary tube and fixing to weld of antenna afterbody, the inner and outer conductor of described radio frequency contact pin connector respectively with the half inner and outer conductor welding of coaxial cable just.

7, described radio frequency contact pin connector, water inlet tap and faucet are welded on the described support, by the location of T shape spacer and support radio frequency contact pin connector, water inlet tap and faucet are assembled and are glued in the Hough formula handle body.

In this utility model, radiation head is copper or the T type cylinder of rustless steel material, it is characterized by: front end is that the cup head vertebral body connects cylinder, to make it to enter body cavities or intestinal, blood vessel etc., its tissue of unlikely damage, its tail end is cylinder, and the axle center is provided with blind hole, and is processed with radial hole and gets through with blind hole at the afterbody cylinder.The technology purpose of two upright openings is to make inner conductor and radiation head blind hole to have enough bonding strengths through high-temperature soldering.And after the inner wire of coaxial cable is packed the afterbody blind hole of radiation head into, again it is radially applied mechanical force, being aided with the distortion that presses fastening it.In addition, recommend to adopt the resistor pressure solder technology, make it have more reliable bonding strength.

In this utility model, medium tube is electron ceramic material, be the step-like tubular cylinder of cylindrical, it is characterized by: be provided with the bipassage ring connected in star at the shoulder cylindrical, the space of one annular groove is used for filling bonding agent, and the space of one annular groove is to block the material that the outer bush that cooperates is with it pressed and is out of shape.Purpose is to make it to have enough bonding strengths with the outer bush assembling,

In this utility model, outer bush is copper or the rustless steel material, its inside and outside circle is step-like tubular cylinder, it is characterized by: front end is the thin-walled tubulose, it is assembled on the shoulder cylindrical of medium tube, with respect to the annular groove position on the shoulder cylindrical of medium tube, impose the multiple spot mechanical pressure, make it to produce the convex distortion, with the axial float that prevents outer bush and medium tube with radially wobble, between the cylindrical shoulder face of cylinder of the inner surface of outer bush and medium tube with in the annular groove, be coated with high temperature adhesive in addition in advance, further be aided with and be fastenedly connected.The ground floor shoulder of the cylindrical of outer bush is provided with annular groove, as the fastening usefulness of fastening hoop card oversheath pipe.The second layer and the 3rd layer of shoulder cylindrical at its cylindrical assemble and welding water cavity cover.Its axle center hole is to be assemblied on the outer conductor of half firm coaxial cable, adopts high-temperature soldering to fix, and makes it to have reliable mechanical connection, is electrically connected and has good heat-conducting.

In this utility model, the water cavity cover is copper or rustless steel material, the bottle cap shape of seemingly revealing the exact details, at least be provided with three apertures at its end face like bottle cap, it is characterized by: its cylindrical that is covered on outer bush is on second and third layer shoulder cylindrical, adopt high-temperature soldering, consist of " the hydrothermal exchange chamber " of melting the antenna front end.

In this utility model, the centering collar is the cylindrical moulding of circular petal thin plate, FEP or ETFE material are selected in recommendation for use, it is characterized by: uniform at least three circular holes around its centre bore, its centre bore is radial communication with uniform circular hole on every side, centre bore be used for half just coaxial cable pass, on every side circular hole be used for the many capillaries in location be distributed in half just coaxial cable around.On the axial length of half firm coaxial cable, regular and equidistant encapsulation some centering collars, to guarantee melting the antenna bending freely.

In this utility model, thermoplastic tube recommends to select for use the polytetrafluoroethylene (PTFE) material, and its light-wall pipe insulation is heat insulation, high temperature resistant, and has certain elasticity and pliability.It is characterized by: by thermoplastic tube half just coaxial cable be wrapped among the many capillary water pipes, make it to keep the excellent contact state.For make melt antenna bending freely, thermoplastic tube is divided into some sections, be interval in centering collar between.

In this utility model, the oversheath pipe is the polytetrafluoroethylene (PTFE) light-wall pipe, and it has good sealing, viscosity not, and high-lubricity, and it is heat insulation to insulate, to the human body avirulence.It is characterized by: its front end is fixed on the afterbody cylindrical of outer bush by dead ring, and it is bonding to be aided with bonding agent.Thereby make it from radiation head, medium tube, outer bush together with the oversheath pipe, form the unified continuous semirigid wire microwave ablation operating theater instruments of diameter.

In this utility model, T shape spacer is copper T shape stairstepping cylinder, it is characterized by: utilize its axle center hole to be assemblied on many capillaries and the half firm coaxial cable, adopt soldering to connect fixing.Be provided with the shoulder hole at its front end, can contain and stop bit in the oversheath pipe, in case excessive axially collect together and radially wobble, simultaneously, by big cylindrical and the thickness thereof of T shape spacer, together with half just water-cooled melt in the operating grip that antenna module is clamped at apparatus in the lump.

High-temperature soldering technology described in the utility model recommends to select for use the lead-free high-temperature solder stick, uses constant temperature electric iron, or semi-automatic welding, guaranteeing that it has enough weld strengths, favorable conductive, heat conductivility, air-tightness is good reliably, no rosin joint, water-tight, do not seep water.

High temperature adhesive described in the utility model recommend to adopt the single-component epoxy resin glue, as selects homemade 6133C one-component thermostable epoxide-resin glue for use, and its characteristics are that dielectric constant is low, moistureproof and waterproof, and adhesive strength is high and resistance to elevated temperatures is good etc.

In this utility model, key is: (one) cooling water flow takes water-in and water-out to split, and cooling water directly is injected in " the hydrothermal exchange chamber " of antenna front end through water inlet tap, water inlet capillary tube, and then flows out along water outlet capillary tube, faucet.Thus, the cooling water of one-way flow has cooling efficiently to melt the hyperpyrexia structural member of antenna front end, and in time that its transfer of heat is extremely external.(2) centering collar and thermoplastic tube can make many capillary centering be wrapped in half firm coaxial cable, and its effect has two: 1. pass through the partly firm coaxial cable of contact conduction cooling, in time shift heat.2. both become simultaneously and are located at hyperpyrexia half just coaxial cable and human normal tissue, as tract, intestinal, and the heat shield reliably together between the internal organs such as blood vessel.(3) adopt the oversheath pipe, make it to become the another layer heat shield outside centering collar and the thermoplastic tube.

This utility model half is the effective type of cooling of microwave ablation antenna just, and is aided with reliable multiple thermal insulation protection, will thoroughly eliminate the burn risk of microwave ablation (heat is coagulated) utensil of half firm type to normal structure.Can say assuredly, this utility model half firm water-cooled microwave ablation antenna has solved the key technical problem of existing microwave ablation operating theater instruments, make it to be applied to tract, intestinal and even blood vessel safely, reliably, even the clinical operation of class such as heart, made it really to possess popularization condition and using value clinically.

Description of drawings

Below in conjunction with accompanying drawing this utility model is further described.

Fig. 1 is the front-end architecture sketch map of this utility model embodiment.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is the B-B cutaway view of Fig. 1.

Fig. 4 is the tail structure sketch map of this utility model embodiment one.

Fig. 5 is the C-C cutaway view of Fig. 4.

Fig. 6 is the tail structure sketch map of this utility model embodiment two.

Label among Fig. 1-Fig. 5 is as follows with the signal title: the 1-radiation head, and the 2-medium tube, 3-half is coaxial cable just, the 4-dead ring, the 5-outer bush, 6-water cavity cover, 7-water inlet pipe, 8-outlet pipe, the 9-collar of feeling relieved, the 10-thermoplastic tube, 11-oversheath pipe, 12-T shape spacer, 13-support, 14-radio frequency contact pin connector, 15-handle tail, 16-faucet, the 17-water inlet tap, 18-Hough formula handle body, 19-pommel.

The specific embodiment

Embodiment one

As Fig. 1-shown in Figure 4, present embodiment half is water-cooled microwave ablation antenna just, and its composition comprises: radiation head 1, medium tube 2, half be coaxial cable 3, dead ring 4 just, outer bush 5, water cavity cover 6, water inlet pipe 7, outlet pipe 8, centering collar 9, thermoplastic tube 10, oversheath pipe 11, T shape spacer 12, (circular plate type) support 13, radio frequency contact pin connector 14, handle tail 15, faucet 16, water inlet tap 17, Hough formula handle body 18, pommel 19.As shown in Figure 1, half just coaxial cable 3 from the axle center hole of outer bush 5, pass, its inner wire is packed in the cylindrical endoporus of afterbody of radiation head 1, and welding, presses, and is fixed.Medium tube 2 is assemblied on the afterbody cylinder of radiation head 1 and is coated with adhesive securement.Outer bush 5 encapsulations are on the afterbody shoulder cylindrical of medium tube 2 cylindricals, and it is fixing to press with mechanical force, is aided with to be adhesively fixed, and the axle center hole of outer bush 5 is assemblied on the outer conductor of half firm coaxial cable 3, and is fixing to weld.Water cavity cover 6 is assemblied on the shoulder cylindrical of outer bush 5 rear ends, adopts to be welded to form " hydrothermal exchange cavity ".Three apertures that the end face of water cavity cover 6 is offered weld three capillaries respectively, and wherein a capillary is that 7, two of water inlet pipes are outlet pipe 8.Assembling centering collar 9, with keep water inlet pipe 7 and outlet pipe 8 be distributed in half just coaxial cable 3 around, encapsulation and seal thermoplastic tube 10 then, to keep water inlet pipe 7 and outlet pipe 8 uniform and be wrapped in half just coaxial cable 3, and make it to have the excellent contact state, then, assemble centering collar 9 and thermoplastic tube 10 successively.

Emphasis shown in Figure 2 is the position relation of centering collar 9 and thermoplastic tube 10 and half firm coaxial cable 3.

Emphasis shown in Figure 3 is that water inlet pipe 7, outlet pipe 8 concern with the rigging position of half firm coaxial cable 3.

Figure 4 shows that the tail structure of this utility model embodiment, the handle profile is staight shank.Copper T shape spacer 12 is assemblied in three

capillaries

7,8 and half afterbody of coaxial cable 3 just, fixes it with welding, utilize the shoulder hole of the front end of T shape spacer 12 to contain oversheath pipe 11 simultaneously, excessive axially collect together and radially wobble to prevent it.17 welding of water inlet pipe 7 and water inlet tap are communicated with, two outlet pipes 8 are communicated with faucet 16 welding, with the inner and outer conductor of partly firm coaxial cable 3 respectively with radio frequency contact pin connector 14 inner and outer conductor firm welding, must not short circuit between the inner and outer conductor.Water inlet tap 17, faucet 16 and radio frequency contact pin connector 14 para-position respectively are welded on the circular plate type support 13.At last, by the big cylindrical of T shape spacer 12 and the big cylindrical of circular plate type support 13, be installed on the axial inside groove of Hough formula handle body 18, play glue, second half Hough formula handle body 18 on the box, gummed assembling handle tail 15 and pommel 19 at last.

Half firm water-cooled microwave ablation antenna of present embodiment, assembling process is as follows:

Earlier outer conductor cover 5 is overlapped 6 assembly weldings with water cavity and become " hydrothermal exchange cavity ", with the end face three aperture para-positions welding of three capillaries and water cavity cover 6, form by " water cavity assembly " again.

Again with radio frequency contact pin connector 14, water inlet tap 17 and faucet 16 respectively para-position be welded on the circular plate type support 13, form " carriage assembly " melt the antenna afterbody.

After this enter the assemble flow of the fore-end of present embodiment:

The half just inner wire of coaxial cable 3 of packing in the cylindrical endoporus of the afterbody of radiation head 1 adopts high-temperature soldering firm, and molten stannum should inject from the radial hole of the afterbody exterior circular column of radiation head, is aided with specific purpose tool and presses fastening.Medium tube 2 is assemblied on the afterbody cylinder of radiation head 1, is coated with high temperature adhesive at both contact surfaces.Axially be pushed on the afterbody shoulder cylindrical of medium tube 2 with " water cavity assembly " encapsulation and along half firm coaxial cable 3, use special-purpose riveting point instrument, groove position on medium tube 2 cylindricals that outer bush 5 corresponds to imposes mechanical force pressure, to retrain its relative motion, form a fixed connection, and be coated with high temperature adhesive at two contact surfaces in advance.Then, axle center hole and half firm coaxial cable 3 outer conductor contacts site to outer bush 5 adopt high-temperature soldering firm.

After high temperature adhesive solidifies, arrangement and straightening half be coaxial cable 3 and three

capillaries

7,8 just, at the position encapsulation centering collar 9 near " hydrothermal exchange chamber ", three

capillaries

7,8 should be distributed in half just coaxial cable around, again with one section thermoplastic tube 10 encapsulation at three

capillaries

7,8 and half just on the coaxial cable 3, utilize special implement, carry out pyrocondensation.Follow encapsulation centering collar 9 and pyrocondensation thermoplastic tube 10 successively, some.In this assembling process, should keep three capillaries 7, the 8 uniform half firm coaxial cables 3 that are wrapped in, each axis should be parallel, smooth, must not askewly twist.At last with oversheath pipe 11 encapsulations on the afterbody shoulder cylindrical of outer bush 5, hoop card dead ring 4, should with the outer toroid connected in star para-position of outer bush 5, be coated with high temperature adhesive with normal temperature cure at its contact surface in advance.

Melt the afterbody of antenna, earlier with T shape spacer 12 encapsulations at three

capillaries

7,8 and half just on the coaxial cable 3, when its end face shoulder hole end surface props up oversheath pipe 11 tail ends, fix it with welding, molten stannum should be injected into capillary tube and half from the radial hole on the shoulder cylindrical of T shape spacer 12 just on the coaxial outer conductor.After this, water inlet pipe 7 and water inlet tap 17 are welded, with two outlet pipes 8 and faucet 16 welding, half firm coaxial cable 3 inner and outer conductor are welded with radio frequency contact pin connector 14 inner and outer conductor respectively, inner and outer conductor must not short circuit.

In above-mentioned assembling process, all employing solder technology should not have rosin joint, and are water-tight, do not seep water.After the assembling that finishes " melting antenna module ", must carry out its full performance and the check of the technical specification of dispatching from the factory.

Carry out the assembling of instrument handle at last: the big cylindrical with T shape spacer 12 big cylindricals and circular plate type support 13 is installed on respectively on the inside groove end face of Hough formula handle body 18, glues together second half Hough formula handle body 18 then, assembles then and glues together handle tail 15 and pommel 19.

So far, finish the assembling of present embodiment one, carry out GB2828 afterwards and carry out sampling inspection.

Embodiment two

Present embodiment half is water-cooled microwave ablation antenna just, is to adopt the better L type of feel pistol grip, and its feature as shown in Figure 6.The fore-end structure of its microwave ablation antenna is identical with embodiment one, is not repeated here.It is as follows to set forth its afterbody assemble flow:

At first, water inlet tap 17 and faucet 16 are welded on the cylindrical stent 13, again with the shoulder cylindrical of L type radio frequency contact pin connector 14 and cylindrical stent 13 end face rims of the mouth to dress and firm welding, become " carriage assembly ".Again water inlet pipe 7 is welded on the water inlet tap 17 and with two outlet pipes 8 and is welded on the faucet 16.With half just coaxial cable 3 inner and outer conductor respectively with the internal and external conductor firm welding of radio frequency contact pin connector 14, must not short circuit between the inner and outer conductor.

Carry out the assembling of instrument handle at last: pack in the middle part clip slot of Hough formula pikestaff handle body 18 with T shape spacer 12 big cylindricals, radio frequency contact pin connector 14 is propped up the locating pin place of handle body 18, and proofread and correct, beat glue, glue together second half Hough formula pikestaff handle body 18 then, assemble then and glue together handle tail 15 and pommel 19.

So far, finish the assembling of present embodiment two, carry out GB2828 afterwards and carry out sampling inspection.

This utility model half just water-cooled microwave ablation antenna after tested and experiment showed, that its performance and technical specification can compare favourably with rigidity water-cooled microwave ablation antenna, its outside dimension that melts antenna is in 2.4 millimeter.If its outside dimension of clinical requirement is littler, can select external half just materials such as coaxial cable and gapless stainless steel tube for use, estimate its outside dimension can be carefully to about the 2mm.

In addition to the implementation, this utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of this utility model requirement.

Claims

1. half firm water-cooled microwave ablation antenna, comprise: radiation head, medium tube, half firm coaxial cable, described medium tube is assemblied on the afterbody cylinder of radiation head, described half firm inner conductor has been packed into, and radiation head afterbody cylinder blind hole is interior also fixes, it is characterized in that: comprise that also encapsulation is at the outer bush of medium tube afterbody, be fixed on the water cavity cover of outer bush rear end, described half firm coaxial cable outer conductor passes from the axle center hole of outer bush vertically, described outer bush rear end and water cavity cover are formed the cavity that is used for carrying out hydrothermal exchange, tail end face at the water cavity cover offers three apertures at least, the front end capillaceous that equates with little number of perforations welds with aperture respectively, described capillary tube be distributed in half just coaxial cable outer conductor around, wherein have at least the tail end of a capillary to link to each other with the water inlet tap that melts antenna, all the other rear ends capillaceous link to each other with the faucet that melts antenna.

2. according to claim 1 half just water-cooled microwave ablation antenna, it is characterized in that: the centering collar that also has half coaxial cable axially spaced-apart setting just, described centering collar is distributed on capillary tube around the half firm coaxial cable, by thermoplastic tube capillary tube and half firm coaxial cable is fixed between the adjacent centering collar.

3. according to claim 2 half just water-cooled microwave ablation antenna, it is characterized in that: the oversheath pipe front end of antenna is fixed on the outer bush by dead ring.

4. according to claim 2 half just water-cooled microwave ablation antenna, it is characterized in that: the front end of outer bush is the thin-walled tubulose of metal, described thin-wall metal pipe is set in outside the medium tube, described medium tube cylindrical is provided with annular groove, and the corresponding position of the thin-wall metal pipe of outer bush is out of shape by pressing realizes being fastenedly connected of outer bush and medium tube in the groove that is pressed into described medium tube cylindrical.

5. according to each described half firm water-cooled microwave ablation antenna of claim 1-4, it is characterized in that: by high-temperature soldering will partly just inner conductor and radiation head afterbody cylinder blind hole be connected firmly.

6. according to each described half firm water-cooled microwave ablation antenna of claim 1-4, it is characterized in that: fill high temperature resistant adhesive between radiation head afterbody cylinder and the medium tube endoporus.

7. according to each described half firm water-cooled microwave ablation antenna of claim 1-4, it is characterized in that: the end section of antenna comprises: T shape spacer, support, radio frequency contact pin connector, faucet, water inlet tap, Hough formula handle body, pommel and handle tail, described T shape spacer is assemblied in and melts half just on coaxial cable and the capillary tube and fixing to weld of antenna afterbody, the inner and outer conductor of described radio frequency contact pin connector respectively with the half inner and outer conductor welding of coaxial cable just.

8. according to claim 7 half just water-cooled microwave ablation antenna, it is characterized in that: described radio frequency contact pin connector, water inlet tap and faucet are welded on the described support, by the location of T shape spacer and support radio frequency contact pin connector, water inlet tap and faucet are assembled and are glued in the Hough formula handle body.