CN112932657A - Radio frequency ablation electrode - Google Patents
Radio frequency ablation electrode Download PDFInfo
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- CN112932657A CN112932657A CN202110211806.5A CN202110211806A CN112932657A CN 112932657 A CN112932657 A CN 112932657A CN 202110211806 A CN202110211806 A CN 202110211806A CN 112932657 A CN112932657 A CN 112932657A
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- 238000007674 radiofrequency ablation Methods 0.000 title claims abstract description 37
- 239000002826 coolant Substances 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 30
- 238000001816 cooling Methods 0.000 description 19
- 230000000694 effects Effects 0.000 description 12
- 239000000498 cooling water Substances 0.000 description 9
- 238000010992 reflux Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000002679 ablation Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 206010028980 Neoplasm Diseases 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 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
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003902 lesion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000011297 radiofrequency ablation treatment Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 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
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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Classifications
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- 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
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1477—Needle-like probes
-
- 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
-
- 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
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1425—Needle
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Otolaryngology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to a radio frequency ablation electrode, which comprises a handle and an electrode needle, wherein a cooling medium inflow channel and a cooling medium discharge channel are arranged in the handle, the electrode needle comprises an outer needle tube, a needle head and a drainage hard tube arranged in the outer needle tube, a hollow jacket is formed between the outer needle tube and the drainage hard tube, the cooling medium inflow channel is communicated with the drainage hard tube, and the cooling medium discharge channel is communicated with the jacket; an energy transmission bridge is further arranged in the jacket and is respectively in close contact with the outer needle tube and the drainage hard tube. The invention can increase the heat exchange area of the cooling medium, thereby reducing the pressure of the cooling medium and reducing the risk of inner leakage at the gluing position of the needle rod and the handle.
Description
Technical Field
The invention relates to a radio frequency ablation electrode, and belongs to the technical field of radio frequency ablation.
Background
The radio frequency ablation electrode is a key medical instrument matched with a radio frequency ablation treatment system to treat tumors, an electrode needle is directly inserted into the center of the tumor under the guidance of image technologies such as ultrasound, endoscope or CT, high temperature and drying are generated on the local part of focal tissues through radio frequency energy generated by the radio frequency ablation treatment system, and finally soft tissues and tumors are solidified and inactivated. The safety of the electrode needle as a medical instrument inserted into the human body is a primary consideration.
The existing radio frequency ablation electrode needle is mostly cooled by circulating cooling water, the circulating cooling water enters the needle body through a hose, the hose is hermetically connected with the needle body through gluing, the specific structure of the radio frequency ablation electrode needle can refer to Chinese patent with the publication number of CN1554314A, the patent discloses a single-needle water-cooled radio frequency ablation electrode, which comprises a handle and a water storage frame in the handle, a cavity in the middle of the handle forms a cooling water backflow pool, the rear section of the radio frequency ablation electrode is inserted into the handle and fixed on the water storage frame and connected with a radio frequency lead wire, a water diversion steel pipe is arranged in the electrode needle, the water inlet hose is communicated with the built-in water diversion steel pipe, and the water outlet hose is communicated with. Therefore, the cooling water flows into the gap between the ablation electrode needle and the water diversion steel pipe from the water inlet hose through the built-in drinking water steel pipe to cool the ablation electrode needle and finally flows back into the reflux pool.
The high temperature that radiofrequency ablation system produced needs cooling water to carry out heat transfer, just needs a large amount of cooling water, but electrode needle internal diameter usually does not exceed 0.9mm, and the external diameter of diversion steel pipe usually does not exceed 0.6mm, to such little pipeline, needs more efficient heat transfer ability. More efficient heat transfer capacity requires a greater flow of cooling water, and the increase in flow easily destroys the adhesive between the needle and the hose, resulting in a risk of leakage.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a radio frequency ablation electrode which can reduce the risk of inner leakage at the gluing part of a needle rod and a handle.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a radio frequency ablation electrode comprises a handle and an electrode needle, wherein a cooling medium inflow channel and a cooling medium discharge channel are arranged inside the handle, the electrode needle comprises an outer needle tube, a needle head and a drainage hard tube arranged in the outer needle tube, a hollow jacket is formed between the outer needle tube and the drainage hard tube, the cooling medium inflow channel is communicated with the drainage hard tube, and the cooling medium discharge channel is communicated with the jacket; an energy transmission bridge is further arranged in the jacket, the heat conductivity coefficients of the energy transmission bridge, the outer needle tube and the drainage hard tube are all larger than the heat conductivity coefficient of the cooling medium, and the energy transmission bridge is respectively in close contact with the outer needle tube and the drainage hard tube and is used for transmitting heat generated by the outer needle tube to the drainage hard tube. Preferably, the energy transmission bridge frame, the outer needle tube and the drainage hard tube are all made of metal.
According to the invention, the outer needle tube and the drainage hard tube are connected into a heat transfer whole through the energy transmission bridge in the jacket, and heat generated by the outer needle tube can be transferred to the drainage hard tube through the energy transmission bridge, so that when a cooling medium enters the drainage hard tube from the cooling medium inflow channel, the drainage hard tube is cooled; when the cooling medium flows out of the drainage hard tube and enters the jacket, the cooling medium cools the energy transmission bridge frame and the outer needle tube simultaneously and cools the built-in drainage hard tube again.
According to the heat exchange principle, the heat exchange amount can be increased by increasing the cooling area and the cooling distance, so that the temperature of the needle rod of the radio frequency ablation needle can be greatly reduced by the aid of the energy transmission bridge frame, the flow rate of a cooling medium can be reduced along with the reduction of the temperature of the needle rod, the pressure of the cooling medium in the whole cooling circulation system is further reduced, the safety and the reliability of a welding part in the radio frequency ablation needle and an adhesive part between the needle body and a hose are guaranteed, and medical accidents are reduced.
Drawings
The invention will be further explained with reference to the drawings.
Fig. 1 is a schematic structural diagram of a radio frequency ablation electrode.
Fig. 2 is a schematic view of the internal structure of the handle.
Fig. 3 is a schematic structural view of the electrode needle.
Fig. 4 is a schematic view of a helical structure.
Fig. 5 and 6 are schematic views of a strip structure.
Fig. 7 is a schematic view of the structure of the projection.
Reference numerals: a handle 1; the front end 1-1 of the handle; through holes 1-1-3; the rear end of the handle is 1-2; 1-3 of a support frame; an electrode needle 2; a drainage groove 3; 3-1 of a drainage hose; a reflux tank 4; 4-1 of a return hose; a radio frequency ablation instrument 5; a temperature acquisition module 6; a helical structural member 7; a strip-shaped structural member 8; a protrusion 9; an insulating sleeve 10; a radio frequency ablator 11; a radio frequency lead 12; a thermocouple lead wire 13; an electrical cable 14; a thermocouple 15; an outer needle tube 21; a needle 21-2; a drainage tube 22; a jacket 23.
Detailed Description
The cooling medium in the present invention may be gas or liquid, wherein the gas may be air, nitrogen, etc., and the liquid may be water, etc., for convenience of describing all the following embodiments of the present invention, the cooling medium is water for describing the technical solution, but is not intended to limit the claimed scope of the present invention.
The heat conduction process is measured according to the heat conductivity, and the heat conduction performance of metal is much faster than that of water, for example, the temperature of metal may rise by tens of degrees if the temperature of water rises by one degree under the condition of certain heat absorption. All of the following embodiments are designed and described in accordance with this principle, i.e. the energy transfer bridge, the outer needle and the drainage tube are made of metal. Of course, the energy transmission bridge frame, the outer needle tube and the drainage hard tube can also be made of other materials with heat conductivity coefficient larger than that of the cooling medium, such as silicon, ceramic and the like.
Example one
The embodiment provides a radio frequency ablation electrode, as shown in fig. 1-3, including handle 1 and electrode needle 2, handle 1 is inside to be equipped with coolant inflow channel and coolant discharge passageway, electrode needle 2 includes outer needle 21, syringe needle 21-2 and arranges the drainage hard tube 22 in outer needle 21 in, and outer needle 21 front end is arranged in to syringe needle 21-2, and syringe needle 21-2 and outer needle 21 are connected through welding process, are equipped with insulating cover 10 with scale on the outer needle 21 to increase the development under the ultrasonic equipment. One end of the outer needle tube 21, which is far away from the needle head 21-2, is inserted into the front end 1-1 of the handle, the front end 1-1 of the handle is provided with a through hole 1-1-3 for the electrode needle 2 to pass through, the through hole 1-1-3 extends forwards for a certain distance on the axis for stabilizing the electrode needle 2, and the rear end 1-2 of the handle is used for the drainage hose 3-1, the backflow hose 4-1, the cable 14 and the like to pass through.
In the embodiment, when the needle 21-2 is used for inserting biological lesion tissue for thermal ablation, the thermocouple lead 13 and the connection radio frequency lead 12 together form a special connection cable 14, which is connected with the radio frequency ablation instrument 11 (as shown in fig. 1) to complete signal transmission, the radio frequency ablation instrument 11 controls to transmit energy to the radio frequency ablation electrode, and the temperature collected by the thermocouple 15 installed in the electrode needle 2 is transmitted to the radio frequency ablation instrument 11. The thermocouple lead wire 13 is connected to a thermocouple 15 disposed in the electrode needle 2. This is the prior art, and reference can be made to relevant documents, which are not described in detail.
As shown in figures 2 and 3, a drainage groove 3 and a backflow groove 4 are fixedly arranged in a handle 1, the drainage groove 3 and the backflow groove 4 are mutually independent, a support frame 1-3 is further arranged in the handle 1, the support frame 1-3 is used for stabilizing the drainage groove 3 and the backflow groove 4, a drainage hose 3-1 is communicated with the drainage groove 3, and a backflow hose 4-1 is communicated with the backflow groove 4.
The tail end 21-1 of an outer needle tube 21 in the electrode needle 2 is fixedly connected with the reflux groove 4, the tip, namely the needle 21-2 is used for being inserted into biological lesion tissues for thermal ablation, a hollow jacket 23 is formed between the outer needle tube 21 and a drainage hard tube 22, the jacket 23 is communicated with the reflux groove 4, and the reflux groove 4 is communicated with the reflux hose 4-1. The reflux groove 4 and the reflux hose 4-1 jointly form a cooling medium discharge channel, the drainage hose 3-1 and the drainage groove 3 jointly form a cooling medium inflow channel, the cooling medium inflow channel is communicated with the drainage hard tube 22, and the cooling medium discharge channel is communicated with the jacket 23.
In the prior art (such as the chinese patent with publication number CN1554314A mentioned in the background of the invention), the drainage tube 22 is usually directly inserted into the drainage tube 3-1 and cemented, and under the pressure of high-pressure water flow, the drainage tube 22 and the drainage tube 3-1 are pulled mutually, so that the leakage risk is easily caused under the action of long time. In the embodiment, the drainage hose 3-1 is inserted into the drainage groove 3, the outer wall of the drainage hose 3-1 is glued with the groove wall of the drainage groove 3, and the drainage groove 3 plays a role in buffering pressure, so that the leakage risk is reduced; in addition, the outer wall of the drainage hose 3-1 is pressed by high-pressure water flow to be attached to the groove wall of the drainage groove 3, so that the pulling effect is not generated any more, and the leakage risk is further reduced. For similar reasons, the present embodiment inserts the return hose 4-1 into the return tank 4.
It should be noted that the drainage groove 3 and the backflow groove 4 play a role of buffering pressure here, and prevent high-pressure water flow from entering the electrode needle 2 to destroy the seal and the weld, and those skilled in the art should know that the drainage groove 3 and the backflow groove 4 can be omitted if the water inlet pressure is not high.
As shown in fig. 3, an energy transmission bridge is further disposed in the jacket 23, and the energy transmission bridge is respectively in close contact with the outer needle tube and the drainage hard tube, and is used for transmitting heat generated by the outer needle tube to the drainage hard tube. As mentioned above, in this embodiment, the energy transmission bridge, the outer needle tube and the drainage hard tube are made of metal, which may be selected from copper, iron, aluminum, gold, silver, palladium, platinum, tin, nickel, zinc, tungsten, stainless steel and alloys thereof; for cost reasons, the outer needle tube 21, the helical structure 7 and the drainage tube 22 are preferably made of stainless steel, but the helical structure 7 may be made of other materials with better heat transfer effect.
As shown in fig. 3 and 4, the energy transmission bridge in the jacket 23 is designed as a spiral structure 7, the spiral structure 7 connects the outer needle tube 21 and the drainage hard tube 22 into a whole, and the heat generated by the outer needle tube 21 can be transferred to the drainage hard tube 22 through the spiral structure 7.
In the embodiment, the outer needle tube 21, the drainage hard tube 22 and the spiral structural member 7 are connected into a whole by using the spiral structural member 7, so that the cooling area is increased. When water enters the drainage hard tube 22 from the cooling medium inflow channel, the drainage hard tube 22 is cooled, the water flows out of the drainage hard tube 22 and enters the jacket 23 with the spiral structural part 7, the cooling water spirally moves around the drainage hard tube 22 to cool the spiral structural part 7 and the outer needle tube 21, and the spiral movement increases the cooling distance, so that the cooling effect of the cooling water is greatly superior to that of the prior art.
The spiral structural part 7 can be further improved according to the diameter of the electrode needle 2 in the embodiment, and the length and the thread pitch of the spiral structural part 7 can be adjusted due to different inner diameters of needle tubes of radio frequency ablation needles of various types, so that the water inlet pressure and the cooling effect reach an optimal balance value. Similarly, in order to reduce the water inlet pressure, the design of the spiral structural member 7 near one end of the needle 21-2 can be optimized, and the design only needs to optimize a small section of the spiral structural member 7, so that water flow can smoothly enter the jacket 23, and the resistance of the water is reduced.
The embodiment can be further modified as follows: the cooling medium inflow passage and the cooling medium discharge passage may be exchanged with each other. Due to the increase of the cooling effect of the whole ablation needle, the pressure of the whole cooling system can be reduced, and then the cooling medium inflow channel and the cooling medium discharge channel can be replaced randomly in the using process, so that the optimal cooling effect is achieved.
Example two
The difference between the present embodiment and the first embodiment is: as shown in fig. 5 and 6, the energy transmission bridge member in this embodiment is designed as a bar structure 8, the bar structure 8 connects the outer needle tube 21 and the drainage tube 22 into a whole, and the heat generated by the outer needle tube 21 can be transferred to the drainage tube 22 through the bar structure 8.
In the embodiment, the outer needle tube 21, the drainage hard tube 22 and the strip-shaped structural member 8 are connected into a whole by the strip-shaped structural member 8, so that the cooling area is increased. When water enters the drainage hard tube 22 from the cooling medium inflow channel, the drainage hard tube 22 is cooled, and the water flows out of the drainage hard tube 22 into the jacket 23 with the strip-shaped structural part 8, so that the cooling effect of the water is greatly better than that of the prior art.
The strip-shaped structural part 8 can also be improved according to the diameter of the electrode needle 2, and the length and the number of the strip-shaped structural part 8 can be adjusted because the inner diameters of needle tubes of radio frequency ablation needles of various types are different, so that the water inlet pressure and the cooling effect reach an optimal balance value at the moment.
EXAMPLE III
The difference between the present embodiment and the first embodiment is: as shown in fig. 7, the energy transmission bridge in the jacket 23 is designed as the protrusion 9, the protrusion 9 connects the outer needle tube 21 and the drainage hard tube 22 into a whole, and the heat generated by the outer needle tube 21 can be transferred to the drainage hard tube 22 through the protrusion 9.
Because the radio frequency ablation needle belongs to puncture interventional medical equipment, the diameter of the radio frequency ablation needle is small, the manufacturing process is difficult, the process difficulty is more difficult due to the fact that the radio frequency ablation needle is further improved and designed in a narrow radio frequency ablation needle tube, in order to achieve the ideal cooling effect, elastic bulges are arranged on the built-in drainage hard tube, the drainage hard tube and the outer needle tube are connected together in an interference filling mode, the process manufacturing difficulty can be reduced, and the effect of improving cooling can be achieved.
In the embodiment, the outer needle tube 21, the drainage hard tube 22 and the bulge 9 are connected into a whole by the bulge 9, so that the cooling area is increased. When water enters the drainage hard tube 22 from the cooling medium inflow passage 2, the drainage hard tube 22 starts to be cooled, and the water flows out of the drainage hard tube 22 into the jacket 23 with the bulges 9, so that the cooling effect of the water cooling device is greatly better than that of the prior art.
The bulges 9 can be improved according to the diameter of the electrode needle 4, the quantity and the arrangement mode of the bulges 9 can be adjusted because the inner diameters of needle tubes of radio frequency ablation needles of various models are different, and the bulges 9 can be randomly distributed on the drainage hard tube and also symmetrically distributed in an array manner, so that the water inlet pressure and the cooling effect at the moment reach an optimal balance value.
The present invention is not limited to the specific technical solutions described in the above embodiments, and other embodiments may be made in the present invention in addition to the above embodiments. It will be understood by those skilled in the art that various changes, substitutions of equivalents, and alterations can be made without departing from the spirit and scope of the invention.
Claims (8)
1. A radio frequency ablation electrode comprises a handle and an electrode needle, wherein a cooling medium inflow channel and a cooling medium discharge channel are arranged inside the handle, the electrode needle comprises an outer needle tube, a needle head and a drainage hard tube arranged in the outer needle tube, a hollow jacket is formed between the outer needle tube and the drainage hard tube, the cooling medium inflow channel is communicated with the drainage hard tube, and the cooling medium discharge channel is communicated with the jacket; the method is characterized in that: an energy transmission bridge is further arranged in the jacket, the heat conductivity coefficients of the energy transmission bridge, the outer needle tube and the drainage hard tube are all larger than the heat conductivity coefficient of the cooling medium, and the energy transmission bridge is respectively in close contact with the outer needle tube and the drainage hard tube.
2. The radio frequency ablation electrode of claim 1, wherein: the energy transmission bridge frame is a spiral structural part and extends spirally along the length direction of the drainage hard tube.
3. The radio frequency ablation electrode of claim 1, wherein: the energy transmission crane span structure includes a plurality of edges drainage hard tube length direction extends's bar structure spare, bar structure spare is along the circumference interval distribution of drainage hard tube.
4. The radio frequency ablation electrode of claim 1, wherein: the energy transmission bridge frame comprises a plurality of bulges which are arranged on the periphery of the drainage hard tube and are distributed at intervals.
5. A radio frequency ablation electrode according to any of claims 1-4, wherein: the energy transmission bridge frame is integrated with the inner part of the outer needle tube and the drainage hard tube.
6. A radio frequency ablation electrode according to any of claims 1-4, wherein: the cooling medium inflow passage and the cooling medium discharge passage may be exchanged with each other during use.
7. A radio frequency ablation electrode according to any of claims 1-4, wherein: the energy transmission bridge frame, the outer needle tube and the drainage hard tube are all made of metal.
8. The radio frequency ablation electrode of claim 2, wherein: the length and the thread pitch of the spiral structural part can be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211806.5A CN112932657A (en) | 2021-02-25 | 2021-02-25 | Radio frequency ablation electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211806.5A CN112932657A (en) | 2021-02-25 | 2021-02-25 | Radio frequency ablation electrode |
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| CN112932657A true CN112932657A (en) | 2021-06-11 |
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| CN202110211806.5A Pending CN112932657A (en) | 2021-02-25 | 2021-02-25 | Radio frequency ablation electrode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113576648A (en) * | 2021-06-30 | 2021-11-02 | 海杰亚（北京）医疗器械有限公司 | Ablation device |
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| US11540868B1 (en) | 2021-06-30 | 2023-01-03 | Hygea Medical Technology Co., Ltd. | Ablation device |
| WO2023273942A1 (en) * | 2021-06-30 | 2023-01-05 | 海杰亚（北京）医疗器械有限公司 | Ablation device |
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Application publication date: 20210611 |