CN109953824A - A kind of microwave ablation needle body, microwave melt needle and microwave ablation method - Google Patents
A kind of microwave ablation needle body, microwave melt needle and microwave ablation method Download PDFInfo
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- CN109953824A CN109953824A CN201910338444.9A CN201910338444A CN109953824A CN 109953824 A CN109953824 A CN 109953824A CN 201910338444 A CN201910338444 A CN 201910338444A CN 109953824 A CN109953824 A CN 109953824A
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- microwave
- needle
- accommodating chamber
- metal shank
- electrical isolation
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- 238000009413 insulation Methods 0.000 claims abstract description 70
- 238000002955 isolation Methods 0.000 claims abstract description 51
- 238000007667 floating Methods 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims description 35
- 238000001816 cooling Methods 0.000 claims description 35
- 230000005764 inhibitory process Effects 0.000 claims description 15
- 239000011810 insulating material Substances 0.000 claims description 5
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- 229940127554 medical product Drugs 0.000 abstract 1
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- 230000000191 radiation effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
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- 229920002530 polyetherether ketone Polymers 0.000 description 2
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
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- 229910045601 alloy Inorganic materials 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 201000007270 liver cancer Diseases 0.000 description 1
- 208000014018 liver neoplasm Diseases 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- -1 optionally Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
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- 229920000260 silastic Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
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- 210000001685 thyroid gland Anatomy 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
- A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
- A61B2018/00023—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids closed, i.e. without wound contact by the fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/183—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves characterised by the type of antenna
- A61B2018/1853—Monopole antennas
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/1869—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves with an instrument interstitially inserted into the body, e.g. needles
Abstract
The embodiment provides a kind of microwave ablation needle body, microwave melt needle and microwave ablation methods, are related to field of medical products.The microwave ablation needle body that the embodiment of the present invention provides includes insulation syringe needle, metal shank and electrical isolation part.Insulation syringe needle is provided with the first accommodating chamber.The second accommodating chamber is provided in metal shank, insulation syringe needle is connected to one end of metal shank, and the first accommodating chamber is connected to the second accommodating chamber.Electrical isolation part is arranged in the second accommodating chamber, for making the floating ground of metal shank.Since metal shank is in floating ground state, thus in microwave ablation, metal shank can play choking effect, without radiation function, microwave signal is inhibited to propagate to microwave input direction, so that in ablation procedure, microwave signal only passes through the insulation outside radiation energy of needle portion, to eliminate the trailing phenomenon in traditional design, the stabilization of ablation form ensure that, make it closer to spherical shape.
Description
Technical field
The present invention relates to field of medical article technology, in particular to a kind of microwave ablation needle body, microwave melt needle and
Microwave ablation method.
Background technique
In recent years, Microwave Coagulation Therapy has become treatment liver cancer, kidney, the critical treatment means of the soft tissues such as thyroid gland it
One.Microwave ablation is using aerial radiation microwave, and microwave makes ion in tissue, polar water molecules whirling vibration, phase mutual friction
And generate fuel factor, so that treatment region is rapidly achieved very high temperature, tissue coagulation, dehydration and it is downright bad, to reach treatment mesh
's.
Existing microwave melt needle, when carrying out microwave ablation, ablation areas form is unstable, substantially elliposoidal, is
Meet Treatment need, it is necessary to increase ablation range, inherently cause to damage to the normal tissue of human body in this way.
Summary of the invention
The purpose of the present invention includes, for example, provide a kind of microwave ablation needle body, can form to ablation areas into
Row improves, and makes it closer to spherical shape.
It is also an objective of the invention that, providing a kind of microwave melt needle, the form of ablation areas can be changed
It is kind, make it closer to spherical shape.
It is also an objective of the invention that, providing a kind of microwave ablation method, better ablation effect can be obtained, is prevented
It stops loss and hurts normal tissue.
The embodiment of the present invention this can be implemented so that
The embodiment provides a kind of microwave ablation needle bodies comprising insulation syringe needle, metal shank and electrical
Separator；The first accommodating chamber is provided in the insulation syringe needle；The second accommodating chamber is provided in the metal shank；The insulation
Syringe needle is connected to one end of the metal shank, and first accommodating chamber is connected to second accommodating chamber；Described second accommodates
Intracavitary to be provided with the electrical isolation part, the electrical isolation part is for making the floating ground of the metal shank.
Optionally, one end of above-mentioned electrical isolation part extend to the metal shank close to it is described insulation syringe needle one end,
The other end of the electrical isolation part extends to the one end of the metal shank far from the insulation syringe needle.
Optionally, one end of above-mentioned electrical isolation part extends in first accommodating chamber, the electrical isolation part it is another
One end extends to the one end of the metal shank far from the insulation syringe needle.
Optionally, above-mentioned microwave ablation needle body further includes cooling tube, is provided with the cooling tube in second accommodating chamber；
The cooling tube is made of electrical insulating material, and the electrical isolation part is the cooling tube；Alternatively, the electricity
Air bound off member is the outer wall that the cooling tube is arranged in and/or the electric insulation layer on inner wall.
Optionally, above-mentioned cooling tube extends in second accommodating chamber close to one end of the insulation syringe needle.
Optionally, the outer surface of above-mentioned metal shank is provided with surface current inhibition layer.
Optionally, one end of above-mentioned surface current inhibition layer extends to the metal shank close to the end of the insulation syringe needle
The other end in portion, the surface current inhibition layer is upwardly extended in the side far from the insulation syringe needle.
Optionally, the distance of one end of above-mentioned surface current inhibition layer to the other end is a, 5mm≤a≤30mm.
Optionally, above-mentioned insulation syringe needle and the metal shank are glued.
Optionally, the outer wall of above-mentioned insulation syringe needle is provided with stepped part, the metal needle along the circumferential direction of the insulation syringe needle
Bar is sheathed on the stepped part close to one end of the insulation syringe needle.
Optionally, one end close to the metal shank of above-mentioned insulation syringe needle, which is provided with, leads glue groove, described to lead glue groove use
In receiving glue.
The embodiments of the present invention also provide a kind of microwave melt needles comprising microwave source, coaxial cable and above-mentioned
Any one microwave ablation needle body；The microwave source is set in the first accommodating chamber of the microwave ablation needle body；Institute
It states coaxial cable and is arranged in second accommodating chamber, and protrude into first accommodating chamber and electrically connect with the microwave source
It connects；The electrical isolation part is for making the coaxial cable and the metal needle body electrical isolation, so that the metal shank is floating
Ground.
Optionally, above-mentioned electrical isolation part completely or partially coats the microwave source.
Optionally, above-mentioned microwave melt needle further includes coaxial cable, and the coaxial cable includes inner conductor, dielectric layer and more
A sub- outer conductor, the dielectric layer are coated on the inner conductor, and the sub- outer conductor is coated on the dielectric layer；Two neighboring institute
Stating has gap between sub- outer conductor.
Optionally, the quantity in above-mentioned gap is multiple, and the distance between adjacent described gap is b, 4mm≤b≤10mm.
Optionally, the width in above-mentioned gap is c, 0.5mm≤c≤4mm.
The embodiments of the present invention also provide a kind of microwave ablation methods, real using any one of the above microwave melt needle
It is existing comprising:
It will be in the insulation syringe needle insertion destination organization of the microwave melt needle；
Make the metal shank and the coaxial cable electrical isolation.
The microwave ablation needle body of the embodiment of the present invention and the beneficial effect of microwave melt needle include, for example:
The microwave ablation needle body that the embodiment of the present invention provides comprising insulation syringe needle, metal shank and electrical isolation
Part.Insulation syringe needle is provided with the first accommodating chamber.The second accommodating chamber is provided in metal shank, insulation syringe needle is connected to metal shank
One end, the first accommodating chamber is connected to the second accommodating chamber.Electrical isolation part is arranged in the second accommodating chamber, for making metal shank
Floating ground.Since metal shank is in floating ground state, thus in microwave ablation, metal shank can play choking effect, not have
There is radiation function, inhibits microwave signal to propagate to microwave input direction, so that microwave signal only passes through insulation in ablation procedure
The outside radiation energy of needle portion ensure that the stabilization of ablation form, make it to eliminate the trailing phenomenon in traditional design
Closer to spherical shape.
The microwave melt needle that the embodiment of the present invention provides, since it includes above-mentioned microwave ablation needle body, thus also has
There is the trailing phenomenon that can be eliminated in traditional design, ensure that the stabilization of ablation form, makes to melt form having closer to spherical shape
Beneficial effect.
Microwave ablation method provided in an embodiment of the present invention, since it is realized by above-mentioned microwave melt needle, microwave disappears
Melting needle can guarantee to melt the stabilization of form, make to melt form closer to spherical shape, therefore the microwave ablation method has and can obtain
Better ablation effect is obtained, the beneficial effect of damage normal tissue is prevented.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 has structure sectional view for microwave melt needle provided in an embodiment of the present invention；
Fig. 2 is the partial structurtes enlarged drawing in Fig. 1 at II；
Fig. 3 is the partial structural diagram in Fig. 1 at III；
Fig. 4 is the overall structure appearance schematic diagram of microwave melt needle provided in an embodiment of the present invention.
Icon: 010- microwave melt needle；100- microwave ablation needle body；110- insulation syringe needle；The first accommodating chamber of 111-；112-
Needle tip；113- stepped part；114- leads glue groove；120- metal shank；The second accommodating chamber of 121-；122- surface current inhibition layer；
130- cooling tube；210- metal column；220- coaxial cable；221- inner conductor；222- dielectric layer；223- outer conductor；The gap 224-.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that if there is the side of the instructions such as term " on ", "lower", "inner", "outside"
Position or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when the side usually put
Position or positional relationship, are merely for convenience of description of the present invention and simplification of the description, rather than the device or member of indication or suggestion meaning
Part must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, being only used for distinguishing description if there is term " first ", " second " etc., it is not understood to indicate or imply phase
To importance.
It should be noted that in the absence of conflict, the feature in the embodiment of the present invention can be combined with each other.
Embodiment 1
Fig. 1 is the partial structure sectional view of microwave melt needle 010 provided in this embodiment.Referring to FIG. 1, the present embodiment mentions
A kind of microwave melt needle 010 is supplied comprising microwave ablation needle body 100, microwave source and coaxial cable 220.Microwave disappears
Melting needle body 100 includes insulation syringe needle 110, metal shank 120 and electrical isolation part.Insulation syringe needle 110 is provided with the first receiving
Chamber 111, microwave source are arranged in the first accommodating chamber 111.The second accommodating chamber 121, coaxial electrical are provided in metal shank 120
Cable 220 is arranged in the second accommodating chamber 121, and is protruded into the first accommodating chamber 111 and be electrically connected with microwave source.Insulate syringe needle
110 are connected to one end of metal shank 120, and the first accommodating chamber 111 is connected to the second accommodating chamber 121.The setting of electrical isolation part exists
In second accommodating chamber 121, for making the floating ground of metal shank 120.Since metal shank 120 is in floating ground state, thus in microwave
When ablation, metal shank 120 can play choking effect, not have radiation function, inhibit microwave signal to microwave input direction
It propagates, so that microwave signal only passes through the insulation outside radiation energy in 110 part of syringe needle, to eliminate biography in ablation procedure
Trailing phenomenon in system design, ensure that the stabilization of ablation form, make it closer to spherical shape.
Microwave melt needle 010 provided in this embodiment is further described below:
Please continue to refer to Fig. 1, microwave ablation needle body 100 includes insulation syringe needle 110 interconnected and metal shank 120.
One end of insulation syringe needle 110 is provided with needle tip 112, and the first accommodating chamber 111 is provided in the syringe needle 110 that insulate, and microwave occurs
Source is arranged in the first accommodating chamber 111, and is located at close to the position of needle tip 112.First accommodating chamber 111 is close to needle tip 112
Setting closed at one end, far from needle tip 112 open at one end be arranged.The second accommodating chamber 121 is provided in metal shank 120,
The open at one end of second accommodating chamber 121 is arranged, so after the syringe needle 110 that insulate is connected on metal shank 120, the first accommodating chamber
111 are connected to the second accommodating chamber 121, form a biggish closed chamber.Insulation syringe needle 110, which uses, meets biocompatibility
The insulating ceramics of high tenacity, optionally, insulation syringe needle 110 use zirconia ceramics.Metal shank 120, which uses, meets bio-compatible
Property metal material, optionally, metal shank 120 is using 304 stainless steels, 316 stainless steels or Nitinol etc..
Fig. 2 is the partial structurtes enlarged drawing in Fig. 1 at II.Referring to figure 2., metal shank 120 passes through with insulation syringe needle 110
Splicing is fixedly connected, specifically, metal shank 120 is Nian Jie by the glue of compound bio compatibility with insulation syringe needle 110.It can be with
Understand, it in other embodiments, can also be according to demand by the way of hot melt by metal shank 120 and insulation syringe needle 110
It is glued, or is linked into an integrated entity using other modes.
Further, the outer wall of insulation syringe needle 110 is provided with stepped part 113, metal shank along the circumferential direction of insulation syringe needle 110
120 are sheathed on the stepped part 113 close to one end of insulation syringe needle 110.Specifically, stepped part 113 is by insulation syringe needle 110 far from needle
The outer wall of 112 one end end of tip is recessed the cyclic structure of formation radially inward, the radial dimension and metal of the cyclic structure
The internal diameter of shank 120 matches, and metal shank 120 is socketed on stepped part 113 when connection, the outer diameter of metal shank 120
Size is equal with the insulation outer diameter of syringe needle 110, and the outer wall of metal shank 120 is connect with the outer wall of insulation syringe needle 110 at this time
Integrally, convenient for puncture.
It should be noted that in the present embodiment, the outer wall of insulation syringe needle 110 is arranged in stepped part 113, by stepped part 113
Be arranged it is easy to process on the outer wall, it is possible to understand that, in other embodiments, in order to realize metal shank 120 outer wall and absolutely
The outer wall of edge syringe needle 110 links into an integrated entity, and stepped part 113 can also be arranged in the inner wall of metal shank 120 according to demand.
Further, insulation syringe needle 110 is additionally provided with close to one end of metal shank 120 leads glue groove 114, leads glue groove 114
For accommodating glue.It is provided on stepped part 113 specifically, leading glue groove 114, and for along the ring of the circumferentially extending of insulation syringe needle 110
Shape slot when gluing, is accommodated in coated in the part glue on stepped part 113 and leads in glue groove 114, so as to improve insulating needle
First 110 with the adhesive strength of metal shank 120, while sealing function can also be played.
Fig. 3 is the partial structural diagram in Fig. 1 at III.Incorporated by reference to referring to Figure 1 and Figure 3, microwave melt needle 010 further includes
Coaxial cable 220, coaxial cable 220 in the second accommodating chamber 121 from wearing into the first accommodating chamber 111 and and microwave source
Connection, so that microwave source be made to play radiation effects.Coaxial cable 220 includes inner conductor 221, dielectric layer 222 and outer conductor
223, along the radially outward direction of coaxial cable 220, inner conductor 221, dielectric layer 222 and outer conductor 223 are cascading,
I.e. dielectric layer 222 is coated on inner conductor 221, and outer conductor 223 is coated on dielectric layer 222.Microwave source is metal column 210, gold
Belong to column 210 to be fixedly connected with the inner conductor 221 of coaxial cable 220, guarantees the electrical connection of metal column 210 and inner conductor 221, together
When metal column 210 and 223 electric insulation of outer conductor.Optionally, the material of metal column 210 be copper, iron, aluminium, gold, silver, palladium, platinum,
Tin, nickel, zinc and its alloy, it is preferred that the material of metal column 210 is copper.
Optionally, metal column 210 and inner conductor 221 using welding or the techniques such as crimp and are fixedly connected.Preferably, metal column
210 crimp connection with the use of inner conductor 221.Optionally, the length of metal column 210 is d, 3mm≤d≤9mm, and its length can be according to
It is adjusted according to different ablation tissues, such as d is optionally 3mm, 7mm, 9mm.
It is performed etching on outer conductor 223 based on crack antenna technology by lithographic technique, is divided outer conductor 223
At multiple sub- outer conductors, there is gap 224 between adjacent sub- outer conductor, thus according to the principle of crack antenna technology, gap 224
Place can also play radiation effects, so pass through the common radiation effects of microwave source and gap 224, can effectively ensure that spoke
Penetrate effect.It should be understood that in other embodiments, gap 224 can also be formed using other techniques according to demand, such as machine
The modes such as tool removing.Optionally, the width in gap 224 be c, 0.5mm≤c≤4mm, for example, c be optionally 0.5mm, 2mm,
4mm。
Further, the quantity in gap 224 is multiple, and multiple gaps 224 are distributed along the axially spaced-apart of coaxial cable 220.
Optionally, the distance between adjacent segment 224 is b, 4mm≤b≤10mm, for example, b is optionally 4mm, 8mm, 10mm.
Fig. 1 is please referred to, in the present embodiment, electrical isolation part is provided in the second accommodating chamber 121, passes through electrical isolation part
Electrical isolation can be carried out to metal shank 120 and coaxial cable 220, due to not having between metal shank 120 and coaxial cable 220
There is conducting, thus when carrying out microwave ablation, metal shank 120 is in floating ground state, can play chokes effect, inhibits microwave
The propagation of signal makes it closer to spherical shape so that the ablation areas form to microwave melt needle 010 improves.Electrical isolation
The material of part is the electrical insulating material of low-k, and optionally, the material of electrical isolation part is high molecular material, such as
PEEK (polyether-ether-ketone) or PI (polyimides) etc..
One end of electrical isolation part extends to metal shank 120 close to one end end of insulation syringe needle 110, electrical isolation part
The other end extend to metal shank 120 far from insulation syringe needle 110 one end, thus to metal shank 120 carry out comprehensively every
From insulation, guarantee that metal shank 120 is at floating ground.
One end of electrical isolation part extends in the first accommodating chamber 111, while the other end of electrical isolation part extends to gold
Belong to the one end of shank 120 far from insulation syringe needle 110, to be further ensured that the electrical isolation effect of electrical isolation part.Further
, electrical isolation part extends to all or part of cladding microwave source.
Fig. 1 is please referred to, specifically, microwave ablation needle body 100 further includes cooling tube 130, cooling tube 130 is both ends open
Tube-like piece is arranged in the second accommodating chamber 121, and is set in outside coaxial cable 220.Cooling tube 130 and coaxial cable 220 it
Between be spaced setting, to form the first passage for cooling media flow between cooling tube 130 and coaxial cable 220, first
Channel is connected to the first accommodating chamber 111；Between cooling tube 130 and metal shank 120 be spaced setting, thus cooling tube 130 with
The second channel for cooling media flow is formed between metal shank 120, second channel is connected to the first accommodating chamber 111.Into
When row microwave ablation, cooling medium enters in first passage, cools down to coaxial cable 220, then flows into the first accommodating chamber
In 111, insulation 110 part of syringe needle is cooled down, enters second channel followed by the first accommodating chamber 111, to metal needle
Bar 120 is cooled down, and finally flows out microwave ablation needle body 100.By cooling medium to coaxial cable 220, insulation syringe needle 110
And the cooling of metal shank 120, the coking degree around radiation areas can be reduced.Cooling tube 130 uses electrical insulating material
It is made, so that cooling tube 130 is carried out electrical isolation to coaxial cable 220 and metal shank 120 as electrical isolation part.
It should be noted that in the present embodiment, cooling tube 130 is made of electrical insulating material, thus by cooling tube 130
Directly as electrical isolation part, it is possible to understand that, in other embodiments, electrical isolation can also be specifically set according to demand
Part, such as electric insulation layer is set as electrical isolation part, or in metal needle on the inner wall and/or outer wall of cooling tube 130
Electric insulation layer is set on the inner wall of bar 120 as electrical isolation part.
Further, cooling tube 130 close to insulation syringe needle 110 one end extend in the second accommodating chamber 121, and part or
All covering microwave sources, to guarantee the electric insulation isolation effect of metal shank 120 Yu coaxial cable 220.And by
Partly or entirely covering microwave source is extended in cooling tube 130, so as to import cooling medium close to needle tip 112
Position, facilitate promoted cooling effect, the coking degree being further reduced around radiation areas.Preferably, cooling tube 130 extends
To the position of all covering microwave sources, i.e. cooling tube 130 is separate close to the end face of 112 one end of needle tip and metal column 210
The end face of 220 one end of coaxial cable, alternatively, cooling tube 130 is located at metal column 210 close to the end face of 112 one end of needle tip
End face far from 220 one end of coaxial cable and the position between the bottom of chamber of the first accommodating chamber 111.
Fig. 4 is the overall structure appearance schematic diagram of microwave melt needle 010 provided in this embodiment.Referring to figure 4., in this reality
It applies in example, the outer surface of metal shank 120 is provided with surface current inhibition layer 122.By the way that surface current inhibition layer 122 is arranged,
It is able to suppress 120 surface of metal shank as caused by the reverse current of 220 outer conductor of coaxial cable, 223 part and generates induced electricity
Lotus and electric current avoid charge inducing and electric current from causing induction field, and then avoid causing to incude place due to charge inducing and electric current
Variation, the trailing phenomenon etc. of caused ablation areas form.Optionally, surface current inhibition layer 122 be can coating material coating
Formed, can coating material substrate be epoxy resin or RTV (room temperature vulcanized silicone
Rubber) silastic material, and doped magnetic material or other surfaces electric current inhibit material to inhibit surface current in the substrate.
Further, one end of surface current inhibition layer 122 extends to metal shank 120 close to the end of insulation syringe needle 110
The other end in portion, surface current inhibition layer 122 is upwardly extended in the side far from insulation syringe needle 110.Optionally, surface current inhibits
The distance of one end of layer 122 to the other end is a, 5mm≤a≤30mm, for example, a is optionally 5mm, 15mm, 20mm, 30mm.
According to a kind of microwave melt needle 010 provided in this embodiment, the working principle of microwave melt needle 010 is:
When microwave melt needle 010 carries out microwave ablation, coaxial cable 220 passes through gold in microwave transmission to metal column 210
Belong to column 210 and is based on crack antenna skill due to being provided with gap 224 on the outer conductor 223 of coaxial cable 220 to external radiation microwave
Art, gap 224 can guarantee radiation effect simultaneously to external radiation microwave, and microwave makes ion in tissue, polar water molecules rotation
Vibration, phase mutual friction and generate fuel factor, so that treatment region is rapidly achieved very high temperature, tissue coagulation, dehydration and it is downright bad.?
During microwave ablation, the outer conductor 223 of coaxial cable 220 forms induced current, and metal shank 120 is due to cooling tube 130
Electrical isolation effect in floating ground, therefore can play chokes effect, inhibit microwave signal along 220 outer conductor 223 of coaxial cable
It is propagated to microwave input direction, improves ablation areas form.Simultaneously because being provided with surface electricity in the outer surface of metal shank 120
Inhibition layer 122 is flowed, the 120 surface induction charge current of metal shank on floating ground is inhibited, and then avoids charge inducing electric current to ablation
Electromagnetic field and ablation areas form impact, contribute to form spherical ablation form.
A kind of microwave ablation needle body 100 provided in this embodiment has at least the following advantages:
The embodiment provides a kind of microwave ablation needle bodies 100, electrical by being arranged in metal shank 120
Insulating layer, so that metal shank 120 is in floating ground when carrying out microwave ablation, metal shank 120 does not have radiation function, coaxially
220 outer conductor 223 of cable is shielded along the electromagnetic wave of 120 reverse transfers of metal shank by metal shank 120 completely, so that entire
In ablation procedure the trailing phenomenon in traditional design can only be eliminated, ensure that in the insulation outside radiation energy in 110 part of syringe needle
Melt the stabilization of form.Surface current inhibition layer 122 is coated on metal shank 120, so as to inhibit due to coaxial cable
120 surface of metal shank caused by the reverse current of 220 outer conductor, 223 part generates charge inducing and electric current, and then avoids leading
The problems such as causing variation, the trailing phenomenon of ablation form helps to improve ablation form.
The embodiment provides a kind of microwave melt needles 010, crack antenna technology are based on, by coaxial electrical
Gap 224 is set on the outer conductor 223 of cable 220 and carries out microwave radiation, ensure that radiation effect.Simultaneously because the microwave melt needle
010 includes above-mentioned microwave ablation needle body 100, therefore also has the stabilization that can guarantee to melt form, is allowed to have for spherical
Beneficial effect.
In conclusion the embodiment of the invention provides a kind of microwave ablation needle body 100 and microwave melt needle 010, based on floating
Ground chokes and surface current inhibit principle, eliminate influence of the induced current to ablation form, so that ablation form is spherical shape.
It is provided with cooling structure, the coaxial cable 220, insulation syringe needle 110 and metal shank 120 of microwave melt needle 010 are carried out cold
But, the coking extent of tissue is reduced to reduce the reduction of tissue permittivity, guarantees the stabilization of antenna radiation performance.It is based on simultaneously
Crack antenna technology carries out microwave radiation by setting gap 224, ensure that radiation effect.
Embodiment 2
A kind of microwave ablation method is present embodiments provided, is realized using the microwave melt needle 010 that embodiment 1 provides,
The following steps are included:
It will be in the insulation syringe needle insertion destination organization of microwave melt needle；Make metal shank and coaxial cable electrical isolation.
When needing to melt destination organization, microwave melt needle is punctured along preset path, until microwave disappears
Melt in the insulation syringe needle insertion destination organization of needle, the microwave of coaxial cable transmission by metal column and gap to external radiation, by
Electrical isolation is carried out by cooling tube in metal shank and coaxial cable, metal shank is in floating ground, therefore in radiation microwave
In the process, metal shank plays floating ground choking effect, is able to suppress and inhibits microwave signal defeated to microwave along coaxial cable outer conductor
Enter direction propagation, guarantee the stabilization of ablation form, be allowed to more close to spherical shape, so as to obtain better microwave ablation effect
Fruit prevents from causing to damage to human normal tissue.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of protection of the claims
It is quasi-.
Claims (10)
1. a kind of microwave ablation needle body, which is characterized in that including insulation syringe needle, metal shank and electrical isolation part；It is described exhausted
The first accommodating chamber is provided in edge syringe needle；The second accommodating chamber is provided in the metal shank；The insulation syringe needle is connected to institute
One end of metal shank is stated, first accommodating chamber is connected to second accommodating chamber；It is arranged in second accommodating chamber
Electrical isolation part is stated, the electrical isolation part is for making the floating ground of the metal shank.
2. microwave ablation needle body according to claim 1, which is characterized in that one end of the electrical isolation part extends to institute
Metal shank is stated close to one end of the insulation syringe needle, it is separate that the other end of the electrical isolation part extends to the metal shank
One end of the insulation syringe needle.
3. microwave ablation needle body according to claim 1, which is characterized in that one end of the electrical isolation part extends to institute
It states in the first accommodating chamber, the other end of the electrical isolation part extends to one of the metal shank far from the insulation syringe needle
End.
4. microwave ablation needle body according to claim 1, which is characterized in that the microwave ablation needle body further includes cooling
Pipe, second accommodating chamber are provided with the cooling tube；
The cooling tube is made of electrical insulating material, and the electrical isolation part is the cooling tube；Alternatively, it is described electrically every
Off member is the outer wall that the cooling tube is arranged in and/or the electric insulation layer on inner wall.
5. microwave ablation needle body according to claim 1-4, which is characterized in that the outer surface of the metal shank
It is provided with surface current inhibition layer.
6. microwave ablation needle body according to claim 5, which is characterized in that one end of the surface current inhibition layer extends
To the metal shank close to the end of the insulation syringe needle, the other end of the surface current inhibition layer is far from the insulation
The side of syringe needle upwardly extends.
7. a kind of microwave melt needle, which is characterized in that including microwave source, coaxial cable and such as any one of claim 1-6
The microwave ablation needle body；The microwave source is set in the first accommodating chamber of the microwave ablation needle body；It is described same
Shaft cable is arranged in second accommodating chamber, and protrudes into first accommodating chamber and be electrically connected with the microwave source；Institute
Electrical isolation part is stated for making the coaxial cable and the metal needle body electrical isolation, so that the floating ground of the metal shank.
8. microwave melt needle according to claim 7, which is characterized in that the electrical isolation part completely or partially coats institute
State microwave source.
9. microwave melt needle according to claim 7, which is characterized in that the coaxial cable includes inner conductor, dielectric layer
With multiple sub- outer conductors, the dielectric layer is coated on the inner conductor, and the sub- outer conductor is coated on the dielectric layer；Adjacent two
There is gap between a sub- outer conductor.
10. a kind of microwave ablation method, which is characterized in that using such as the described in any item microwave melt needles realities of claim 7-9
It is existing, which comprises
It will be in the insulation syringe needle insertion destination organization of the microwave melt needle；
Make the metal shank and the coaxial cable electrical isolation.
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| WO2021139017A1 (en) * | 2020-01-07 | 2021-07-15 | 南京康友医疗科技有限公司 | Microwave ablation needle head and microwave ablation needle |
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| CN109953824B (en) | 2023-05-05 |
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