CN110742685A - Novel nanosecond pulse safety electrode - Google Patents
Novel nanosecond pulse safety electrode Download PDFInfo
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- CN110742685A CN110742685A CN201911065781.1A CN201911065781A CN110742685A CN 110742685 A CN110742685 A CN 110742685A CN 201911065781 A CN201911065781 A CN 201911065781A CN 110742685 A CN110742685 A CN 110742685A
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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
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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
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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
- A61B18/148—Probes or electrodes therefor having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
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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
- 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
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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
- A61B2018/00964—Features of probes
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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
- A61B2018/1497—Electrodes covering only part of the probe circumference
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Otolaryngology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention discloses a novel nanosecond pulse safety electrode which comprises two electrode upper arms, wherein the upper ends of the two electrode upper arms are arranged on an electrode handle, the lower end of each electrode upper arm is provided with an electrode lower arm, a needle pitch measuring ruler is arranged between the two electrode lower arms, an electrode needle and a depth measuring ruler for measuring the depth of an electrode inserted into a tissue are arranged in each electrode lower arm, the electrode needle is electrically connected with a power line safety access port on the surface of the electrode lower arm, the lower end of each electrode lower arm is provided with a telescopic insulating sleeve, the electrode needle can penetrate out of the insulating sleeve, and when the insulating sleeve is not compressed, the electrode needle is wrapped by the insulating sleeve. The invention can prolong the service life of the nanosecond pulse electrode joint and improve the safety of the electrode, and meanwhile, because the novel electrode has high universality in different animal experiments, other standby electrodes are not needed, and the experiment cost is greatly reduced.
Description
Technical Field
The invention relates to an electrode device for guiding nanosecond pulses to enter animal tissues, in particular to a novel nanosecond pulse safety electrode which can prevent electric shock and electrode needle exposure in air for discharging, and can indicate the distance between the electrode needles and the depth of inserting into the tissues.
Background
The ablation of animal tissue with nanosecond pulses has been a hotspot of research in the field of high voltage pulses in recent years. The primary function of the nanosecond pulse electrode is to introduce nanosecond pulses output by a nanosecond pulse power supply into the tissue. At present, a commonly used nanosecond pulse electrode mainly comprises a plastic joint, an electrode handle, an electrode needle and a metal joint. The electrode is fixed on the electrode bracket in a tenon-and-mortise connection mode through the plastic joint, the metal joint is connected with a nanosecond pulse power supply output line through the alligator clip, then the electrode pin is inserted into animal tissues, and the power supply is started. However, the tenon-and-mortise connection mode between the plastic joint and the electrode bracket has large abrasion on the joint, and the situation that the plastic joint is not firmly fixed and is easy to fall off often occurs after long-term use. The metal joint and the nanosecond pulse power supply output line are connected through the crocodile clip, the metal joint is often exposed in the air, the experimental personnel can be caused to get an electric shock accidentally, and the relatively serious potential safety hazard is realized. Two electrode needles are fixed on an electrode handle, the needle pitch is fixed, a large number of electrodes with different needle pitches are usually reserved, and different electrodes are selected according to the requirement on the needle pitch in a specific experiment. Meanwhile, the length of the electrode needle of each electrode is fixed, but different animal experiments have different requirements on the depth of the electrode needle inserted into tissues, and the requirements on the types and the number of the spare electrodes are further increased. Since there is no means for indicating the depth of insertion into the tissue of the animal on the conventional electrode, it is troublesome to measure the mark with a ruler in advance before the experiment. When the traditional electrode is inserted into animal tissues, the contact section of the electrode needle and the tissue is exposed in the air due to respiratory movement of animals, muscle vibration and the like, so that the two electrode needles break through air discharge to damage the tissues, the heat effect is caused, and the experimental result is interfered.
Disclosure of Invention
The invention aims to provide a novel nanosecond pulse safety electrode aiming at the defects that the joint of the existing nanosecond pulse electrode is easy to wear, low in safety coefficient, low in universality among different experiments and easy to puncture air for discharging.
The purpose of the invention is realized by the following technical scheme: the utility model provides a novel nanosecond pulse safety electrode, including two electrode upper arms, install on the electrode handle the upper end of two electrode upper arms, an electrode underarm is installed to the lower extreme of every electrode upper arm, install needle gauge length measuring ruler between two electrode underarms, install the electrode needle in every electrode underarm and be used for measuring the degree of depth measuring ruler that the electrode inserted the tissue degree of depth, the electrode needle is connected with the power cord safe access mouth electricity on electrode underarm surface, the lower extreme of electrode underarm has the insulating cover of telescopic, insulating cover can be worn out to the electrode needle, when the electrode needle inserts the tissue, the electrode needle is wrapped up by insulating cover and rubber suction cup completely, with the complete isolated division of the part before the electrode needle gets into the tissue of both sides, avoid the electrode needle to expose and arouse in the.
The novel nanosecond pulse safety electrode is in the shape of a compass as a whole. The electrode shank may also have a nipple with threads thereon, which reduces wear by a screw connection with the nut of the electrode holder. The upper ends of the two electrode upper arms are arranged on the electrode handle through a shaft, and can also be arranged on the electrode handle through two parallel shafts, so that the electrode upper arms can freely rotate relative to the electrode handle. In addition, the included angle of the two arms is adjustable through the spiral connection between the upper arm and the lower arm of the electrode, and the lower arms on the two sides can be always kept parallel under the condition that the included angle of the upper arms of the electrodes on the two sides is changed.
Furthermore, the power line safety access opening is a metal screw fixed on the surface of the lower arm of the electrode, the metal ring end of the accessed power connecting line is fixed on the metal screw through a plastic nut, and the edge of the plastic nut completely covers the metal ring of the power connecting line, so that the chance of contact with an operator is avoided. The power connection wire metal ring here is modified from the existing alligator clip.
Furthermore, the needle pitch measuring ruler is a plastic round bar, scales are arranged on the surface of the plastic round bar, the needle pitch measuring ruler penetrates through a round hole in the side face of the lower electrode arm, and the needle pitch measuring ruler is fixed on the lower electrode arm through a first fixing knob screwed into a threaded hole in front of the lower electrode arm. After zero calibration, the needle pitch of the electrode is obtained by reading the scales of the electrode needle corresponding to the needle pitch measuring ruler, and the needle pitch can be adjusted at will.
Furthermore, the insulating sleeve is a flexible insulating sleeve which is provided with folds and can be freely stretched, and is shaped like a one-piece dress.
Furthermore, the upper end of the insulating sleeve is fixed at the lower end of the electrode lower arm, the lower end of the insulating sleeve is a soft rubber insulating sucker capable of being adsorbed on the surface of a tissue or an organ, the lower end of the depth measuring ruler is fixedly connected with the upper surface of the sucker, and the bottom surface of the sucker is provided with a small hole for the electrode needle to penetrate out.
Furthermore, the depth measuring ruler is a hollow transparent plastic round rod, and the electrode needle is positioned inside the round rod.
Furthermore, a fixed ring is fixed in the lower arm of the electrode, and the depth measuring ruler is arranged in the fixed ring in a sliding mode, so that the depth measuring ruler cannot move transversely but can move freely longitudinally.
Furthermore, the surface of the depth measuring ruler contains scales, when the zero scale is opposite to the lower surface of the fixed circular ring, the needle point of the electrode needle is just in the same plane with the sucker, namely, the scale corresponding to the lower surface of the fixed circular ring of the depth measuring ruler is the depth of the electrode needle inserted into tissues. And after the insertion depth is set, the depth measuring ruler is fixed through a second fixing knob in front of the lower arm of the electrode.
Furthermore, the lower arm of the electrode is made of transparent insulating materials.
Furthermore, the insulating sleeve is made of Teflon.
The invention has the advantages that the service life of the nanosecond pulse electrode joint can be prolonged, the safety of the electrode can be improved, and meanwhile, the novel electrode is highly universal in different animal experiments, other standby electrodes are not needed, so that the experiment cost is greatly reduced. In addition, the multifunctional experiment device reduces the use of other experiment auxiliary instruments and improves the experiment efficiency. The insulating sleeve is used, so that the phenomena that the electrode is exposed to puncture air to discharge to generate heat and damage non-target tissues are avoided, the experimental error is reduced, and the effectiveness and the reliability of experimental data are improved.
Drawings
The invention is further explained below with reference to the figures and examples;
FIG. 1 is a front constructional view of the present invention;
FIG. 2 is a side construction view of the present invention;
FIG. 3 is a cross-sectional view of the plane of the circular hole;
in the figure, a connector 1, an electrode handle 2, an upper electrode arm 3, a fixing screw 4, a metal screw 5, a power supply connecting wire metal ring 5', a plastic nut 6, a needle pitch measuring ruler 7, a first fixing knob 8, a depth measuring ruler 9, a fixing ring 10, a second fixing knob 11, a side hole 12, an insulating sleeve 13, an insulating sucker 14, an electrode needle 15, a round hole 16 and a lower electrode arm 17.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. In the following description and in the drawings, the same numbers in different drawings identify the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims. Various embodiments of the present description are described in an incremental manner.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, the descriptions referred to as "first", "second", etc. in this application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
As shown in fig. 1-3, the present embodiment provides a novel nanosecond pulse safety electrode, which includes two upper electrode arms 3, the upper ends of the two upper electrode arms 3 are mounted on an electrode handle 2, the lower end of each upper electrode arm 3 is mounted with a lower electrode arm 17, a needle distance measuring ruler 7 is mounted between the two lower electrode arms 17, an electrode needle 15 and a depth measuring ruler 9 for measuring the depth of the electrode inserted into the tissue are mounted in each lower electrode arm 17, the electrode needle 15 is electrically connected to a power line safety access port on the surface of the lower electrode arm 17, the lower end of the lower electrode arm 17 is provided with a retractable insulating sleeve 13, the electrode needle 15 can penetrate out of the insulating sleeve 13, when the insulating sleeve 13 is not compressed, the electrode needle 15 is wrapped by the insulating sleeve 13, and the portions of the electrode needles 15 on both sides before entering the tissue are completely isolated, so as to avoid the electrode needle 15 from being exposed to the.
The novel nanosecond pulse safety electrode is in the shape of a compass as a whole. The electrode handle 2 may also have a connector 1, the connector 1 having threads thereon, the connector 1 reducing wear by a threaded connection with the electrode holder nut. The upper ends of the two electrode upper arms 3 are arranged on the electrode handle 2 through a shaft, and can also be arranged on the electrode handle 2 through two parallel shafts, thereby realizing that the electrode upper arms 3 can freely rotate relative to the electrode handle 2. In addition, the lower end of the upper electrode arm 3 is provided with a fixing screw 4, the lower electrode arm 17 is of a transparent plastic structure, the head of the lower electrode arm is provided with a ring, the lower electrode arm can be clamped into the fixing screw 4 of the upper electrode arm 3, the included angle between the lower electrode arm and the upper electrode arm 3 can be freely adjusted, and the surface of the upper electrode arm is fixed through a nut. The included angle of the two arms is adjustable through the spiral connection between the upper arm and the lower arm of the electrode, and the lower arms on the two sides can be always kept parallel under the condition that the included angle of the upper arms 3 of the electrodes on the two sides is changed.
In an embodiment of the application, the power cord safety access opening is a metal screw 5 fixed on the surface of the electrode lower arm 17, a power supply connecting wire metal ring 5 'end connected to the metal screw 5 is fixed on the surface of the electrode lower arm 17 through a plastic nut 6, and the edge of the plastic nut 6 completely covers the power supply connecting wire metal ring 5', so that the chance of contact with an operator is avoided. The power connection wire metal ring 5' here is modified from an existing alligator clip.
In one embodiment of the present application, the needle gage 7 is a plastic round bar with scales on the surface, the needle gage 7 passes through the side hole 12 on the side of the electrode lower arm 17, and the needle gage 7 is fixed on the electrode lower arm 17 by the first fixing knob 8 screwed into the threaded hole in front of the electrode lower arm 17. After zero calibration, the needle pitch of the electrode needles 15 on the two sides is obtained by reading the scales of the electrode needles 15 corresponding to the needle pitch measuring ruler 7, and the needle pitch can be adjusted at will.
In an embodiment of the present application, the insulating sheath 13 is a flexible insulating sheath with folds, which is capable of freely stretching and contracting, and is shaped like a dress. The insulating sleeve 13 is made of Teflon.
In an embodiment of the present application, the upper end of the insulating sleeve 13 is fixed at the lower end of the electrode lower arm 17, the lower end of the insulating sleeve is a soft rubber insulating suction cup 14 which can be adsorbed on the surface of a tissue or an organ, the lower end of the depth measuring ruler 9 is fixedly connected with the upper surface of the suction cup, and the bottom surface of the suction cup is provided with a small hole for the electrode needle 15 to penetrate out.
In one embodiment of the present application, the depth measuring ruler 9 is a hollow transparent plastic round bar, and the electrode needle 15 is located inside the round bar.
In one embodiment of the present application, a fixed ring 10 is fixed in the lower electrode arm 17, and has an inner diameter similar to the inner diameter of the depth measuring ruler 9, and the inner surface is smooth, so that the depth measuring ruler 9 can freely pass through the inner surface longitudinally. The depth measuring ruler 9 is arranged in the fixed ring 10 in a sliding mode, in addition, a round hole 16 for the depth measuring ruler 9 to penetrate through is formed in the lower end of the lower electrode arm 17, the depth measuring ruler 9 cannot move transversely but can move freely longitudinally, and the lower electrode arm 17 is made of transparent insulating materials.
In an embodiment of the present application, the surface of the depth measuring ruler 9 includes scales, and when the zero scale is directly opposite to the lower surface of the fixed ring 10, the needle tip of the electrode needle 15 is just in the same plane with the suction cup, that is, the scale corresponding to the lower surface of the fixed ring 10 on the surface of the depth measuring ruler 9 is the depth of the electrode needle 15 inserted into the tissue. After the setting of the insertion depth, the depth measuring ruler 9 is fixed by the second fixing knob 11 in front of the electrode lower arm 17.
The joint 1 is connected with the electrode bracket, and the included angle between the two electrode upper arms 3 is well adjusted. The lower arms 17 of the two sides of the electrode are inserted into the fixing screws 4 on the surface of the upper arm 3 of the electrode to keep the lower arms of the two sides parallel. Then, the needle pitch measuring ruler 7 penetrates through a side hole 12 on the side face of the lower electrode arm, 0 scale mark is aligned to an electrode needle on one side, the lower electrode arms on two sides are adjusted to enable the needle pitch of the electrodes on two sides to reach a target value, and then the needle pitch measuring ruler is fixed by inwards rotating the first fixing knob 8. And then the upper electrode arms 3 and the lower electrode arms 17 on the two sides are fixed through the fixing screws 4 and the nuts. Then, two power connecting wire metal rings 5 'are clamped into the power wire access port screws 5 and are fixed tightly through the power wire access port plastic screw caps 6, and at the moment, the edges of the plastic screw caps 6 completely cover the power connecting wire metal rings 5', so that the personal safety of operators can be effectively protected. When the insulating sucker 14 and the needle tip of the electrode needle 15 are positioned on the same plane, the 0 scale mark of the depth measuring ruler 9 is opposite to the lower surface of the fixed circular ring 10. The length of the electrode needle exposed out of the insulating sucker 14, namely the scale shown by the depth measuring ruler 9, is adjusted by stretching the insulating sleeve 13, and the depth measuring ruler 9 is fixed by the second fixing knob 11 after the insertion depth is adjusted to a target value. Finally, the exposed part of the electrode needle is inserted into animal tissue, the rubber insulating sucker 14 is tightly attached, and a nanosecond pulse power supply is started for carrying out experiments. Because the electrode needle 15 is completely wrapped in the animal tissue and the insulating sucker 14, the puncture air discharge caused by the contact of the outside air can not be generated. Meanwhile, after the depth gauge 9 is fixed and the insulating suction cup 14 is attached, the depth of the electrode needle 15 inserted into the tissue can be completely maintained unchanged during the experiment.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a novel nanosecond pulse safety electrode, a serial communication port, including two electrode upper arms, install on the electrode handle the upper end of two electrode upper arms, an electrode underarm is installed to the lower extreme of every electrode upper arm, install the gauge needle between two electrode underarms and survey the chi, install the electrode needle in every electrode underarm and be used for surveying the electrode and insert the degree of depth survey chi of organizing the degree of depth, the electrode needle is connected with the power cord safe access mouth electricity on electrode underarm surface, the lower extreme of electrode underarm has the insulating cover of telescopic, insulating cover can be worn out to the electrode needle, when insulating cover is not compressed, the electrode needle is wrapped up by insulating cover.
2. The nanosecond pulse safety electrode according to claim 1, wherein the power line safety access port is a metal screw fixed on the surface of the lower arm of the electrode, the metal ring end of the power line is fixed on the surface of the lower arm of the electrode through a plastic nut, and the edge of the plastic nut completely covers the metal ring of the power line.
3. The nanosecond safety electrode according to claim 1, wherein the needle gauge is a plastic round bar with scales on the surface, and the needle gauge passes through a round hole on the side surface of the lower electrode arm, and is fixed on the lower electrode arm by screwing the first fixing knob into a threaded hole in front of the lower electrode arm.
4. A novel nanosecond pulse safety electrode according to any of claims 1-3, wherein the insulating sleeve is a corrugated, freely stretchable, insulating soft sleeve.
5. The nanosecond pulse safety electrode according to claim 4, wherein the upper end of the insulating sleeve is fixed on the lower end of the lower arm, the lower end of the insulating sleeve is a soft rubber insulating sucker which can be adsorbed on the surface of a tissue or organ, the lower end of the depth measuring ruler is fixedly connected with the upper surface of the sucker, and the bottom surface of the sucker is provided with a small hole for the electrode needle to penetrate through.
6. The nanosecond pulse safety electrode according to claim 5, wherein the depth measuring ruler is a hollow transparent plastic round bar, and the electrode needle is located inside the round bar.
7. The nanosecond pulse safety electrode according to claim 6, wherein a fixed ring is fixed in the lower arm of the electrode, and the depth measuring ruler is slidably arranged in the fixed ring.
8. The nanosecond pulse safety electrode as set forth in claim 7, wherein the depth measuring ruler has a scale on its surface, when the zero scale is aligned with the lower surface of the fixed ring, the needle point of the electrode needle is just in the same plane with the suction cup, and the depth measuring ruler is fixed by the second fixing knob in front of the lower arm of the electrode after the setting of the insertion depth.
9. The nanosecond pulse safety electrode according to claim 1, wherein the lower electrode arm is made of transparent insulating material.
10. The nanosecond pulse safety electrode according to claim 1, wherein the insulating sleeve is made of teflon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911065781.1A CN110742685A (en) | 2019-11-04 | 2019-11-04 | Novel nanosecond pulse safety electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911065781.1A CN110742685A (en) | 2019-11-04 | 2019-11-04 | Novel nanosecond pulse safety electrode |
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| CN110742685A true CN110742685A (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911065781.1A Pending CN110742685A (en) | 2019-11-04 | 2019-11-04 | Novel nanosecond pulse safety electrode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113907868A (en) * | 2021-10-08 | 2022-01-11 | 杭州维纳安可医疗科技有限责任公司 | Electrode needle assembly and ablation apparatus |
-
2019
- 2019-11-04 CN CN201911065781.1A patent/CN110742685A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113907868A (en) * | 2021-10-08 | 2022-01-11 | 杭州维纳安可医疗科技有限责任公司 | Electrode needle assembly and ablation apparatus |
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