A new type of nanosecond pulse safety electrode

Abstract

The invention discloses a novel nanosecond pulse safety electrode, comprising two electrode upper arms, the upper ends of the two electrode upper arms are mounted on an electrode handle, an electrode lower arm is mounted on the lower end of each electrode upper arm, a needle distance measuring ruler is mounted between the two electrode lower arms, an electrode needle and a depth measuring ruler for measuring the depth of electrode insertion into tissue are mounted in each electrode lower arm, the electrode needle is electrically connected to a power line safety access port on the surface of the electrode lower arm, the lower end of the electrode lower arm has a retractable insulating sleeve, the electrode needle can pass through the insulating sleeve, and when the insulating sleeve is not compressed, the electrode needle is wrapped by the insulating sleeve. The invention can improve the service life of the nanosecond pulse electrode connector and the safety of the electrode, and at the same time, because the novel electrode is highly universal in different animal experiments, no other spare electrodes are required, which greatly reduces the experimental cost.

Description

Technical Field

[0001] The present invention relates to an electrode device for guiding nanosecond pulses into animal tissues, and in particular to a novel nanosecond pulse safety electrode, which can prevent electric shock, discharge of electrode needles exposed to the air, and indicate the distance between electrode needles and the depth of insertion into tissues. Background Art

[0002] The use of nanosecond pulses to ablate animal tissues has been a hot topic in the field of high-voltage pulse research in recent years. The main function of the nanosecond pulse electrode is to introduce the nanosecond pulse output by the nanosecond pulse power supply into the tissue. At present, the commonly used nanosecond pulse electrodes are mainly composed of a plastic joint, an electrode handle, an electrode needle and a metal joint. The electrode is fixed to the electrode holder by a plastic joint in a mortise and tenon connection, and the metal joint is connected to the output line of the nanosecond pulse power supply through an alligator clip. Then the electrode needle is inserted into the animal tissue and the power supply is started. However, the mortise and tenon connection between the plastic joint and the electrode holder causes greater wear on the joint, and long-term use often results in loose fixation and easy to fall off. The metal joint and the output line of the nanosecond pulse power supply are connected by an alligator clip, which often exposes the metal joint to the air, which may cause the experimenter to accidentally get an electric shock, posing a serious safety hazard. The two electrode needles are fixed on the electrode handle, and the needle distance is fixed. A large number of electrodes with different needle distances are often reserved. Different electrodes are selected according to the needle distance requirements in specific experiments. At the same time, the length of the electrode needle of each electrode is fixed, but different animal experiments have different requirements for the depth of insertion into the tissue, which further increases the requirements for the type and number of spare electrodes. Since there is no device on the traditional electrode to indicate the depth of insertion into the animal tissue, it is necessary to measure and mark with a ruler before the experiment, which is quite troublesome. When the traditional electrode is inserted into the animal tissue, the contact section between the electrode needle and the tissue may be exposed to the air due to the animal's breathing movement, muscle tremor, etc., causing the two electrode needles to break through the air and discharge, damaging the tissue, causing thermal effects, and interfering with the experimental results. Summary of the invention

[0003] The purpose of the present invention is to provide a new type of nanosecond pulse safety electrode to address the shortcomings of existing nanosecond pulse electrode joints, such as easy wear, low safety factor, low versatility between different experiments, and easy breakdown of air discharge. The electrode joint is wear-resistant and can effectively prevent the operator from getting an electric shock and the electrode from being exposed to the air and thus breaking through the air discharge. At the same time, it has a high degree of versatility in different nanosecond pulse ablation animal tissue experiments.

[0004] The objective of the present invention is achieved through the following technical scheme: a novel nanosecond pulse safety electrode, comprising two electrode upper arms, the upper ends of the two electrode upper arms are mounted on an electrode handle, an electrode lower arm is mounted on the lower end of each electrode upper arm, a needle distance measuring ruler is mounted between the two electrode lower arms, an electrode needle and a depth measuring ruler for measuring the depth of electrode insertion into tissue are mounted in each electrode lower arm, the electrode needle is electrically connected to a power cord safety access port on the surface of the electrode lower arm, the lower end of the electrode lower arm has a retractable insulating sleeve, the electrode needle can pass through the insulating sleeve, when the electrode needle is inserted into the tissue, the electrode needle is completely wrapped by the insulating sleeve and the rubber suction cup, the portions of the electrode needles on both sides before entering the tissue are completely isolated, and the electrode needles are prevented from being exposed to the air and causing breakdown discharge.

[0005] The new nanosecond pulse safety electrode is shaped like a compass as a whole. The electrode handle can also have a joint with threads, and the joint can reduce wear by spiral connection with the electrode bracket nut. The upper ends of the two electrode upper arms are mounted on the electrode handle through an axis, or they can be mounted on the electrode handle through two parallel axes, so that the electrode upper arms can rotate freely relative to the electrode handle. In addition, the angle between the upper and lower arms of the electrode is adjustable through a spiral connection, which can ensure that when the angle of the upper arms of the electrodes on both sides changes, the lower arms on both sides always remain parallel.

[0006] Furthermore, the power cord safety access port is a metal screw fixed on the surface of the lower arm of the electrode, and the metal ring end of the connected power connection line is fixed to the metal screw through a plastic nut, and the edge of the plastic nut completely covers the metal ring of the power connection line, thereby avoiding the chance of contact with the operator. The metal ring of the power connection line here is derived from the existing crocodile clip.

[0007] Furthermore, the needle distance measuring ruler is a plastic round rod with a scale on the surface. The needle distance measuring ruler passes through the round hole on the side of the electrode lower arm, and is fixed on the electrode lower arm by screwing the first fixing knob into the threaded hole in front of the electrode lower arm. After zeroing, the electrode needle distance is obtained by reading the scale corresponding to the electrode needle on the needle distance measuring ruler, and the needle distance can be adjusted arbitrarily.

[0008] Furthermore, the insulating cover is a pleated, freely retractable insulating soft cover, shaped like a dress.

[0009] Furthermore, the upper end of the insulating sleeve is fixed to the lower end of the electrode lower arm, and its lower end is a soft rubber insulating suction cup that can be adsorbed on the surface of tissue or organ. The lower end of the depth measuring ruler is fixedly connected to the upper surface of the suction cup, and a small hole for the electrode needle to pass through is opened on the bottom surface of the suction cup.

[0010] Furthermore, the depth measuring ruler is a hollow transparent plastic round rod, and the electrode needle is located inside the round rod.

[0011] Furthermore, a fixed ring is fixed inside the lower arm of the electrode, and the depth measuring ruler is slidably arranged in the fixed ring, so that the depth measuring ruler cannot move laterally but can move freely longitudinally.

[0012] Furthermore, the surface of the depth measuring ruler has a scale. When the zero scale is opposite to the lower surface of the fixed ring, the electrode needle tip is just in the same plane as the suction cup, that is, the scale corresponding to the lower surface of the fixed ring of the depth measuring ruler is the depth of the electrode needle inserted into the tissue. After the insertion depth is set, the depth measuring ruler is fixed by the second fixed knob in front of the lower arm of the electrode.

[0013] Furthermore, the electrode lower arm is made of transparent insulating material.

[0014] Furthermore, the insulating sleeve is made of Teflon.

[0015] The beneficial effect of the present invention is that the present invention can improve the service life of the nanosecond pulse electrode connector and the safety of the electrode. At the same time, because the new electrode is highly versatile in different animal experiments, no other spare electrodes are required, which greatly reduces the experimental cost. In addition, its versatility also reduces the use of other experimental auxiliary equipment and improves experimental efficiency. The use of the insulating sleeve also avoids the phenomenon of the electrode being exposed to the air to generate heat and damage non-target tissues, reducing experimental errors and improving the validity and reliability of experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 It is a front structural diagram of the present invention;

[0018] Figure 2 It is a side structural diagram of the present invention;

[0019] Figure 3 It is a cross-sectional view of the plane where the circular hole is located;

[0020] In the figure, connector 1, electrode handle 2, electrode upper arm 3, fixing screw 4, metal screw 5, metal ring 5' of power connection line, plastic nut 6, needle distance measuring ruler 7, first fixing knob 8, depth measuring ruler 9, fixing ring 10, second fixing knob 11, side hole 12, insulating sleeve 13, insulating suction cup 14, electrode needle 15, round hole 16, electrode lower arm 17. DETAILED DESCRIPTION

[0021] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. In the following description and drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the attached claims. The various embodiments of this specification are described in a progressive manner.

[0022] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] like Figure 1-3 As shown, this embodiment provides a novel nanosecond pulse safety electrode, including two electrode upper arms 3, the upper ends of the two electrode upper arms 3 are mounted on the electrode handle 2, and the lower end of each electrode upper arm 3 is mounted with an electrode lower arm 17, and a needle distance measuring ruler 7 is installed between the two electrode lower arms 17. An electrode needle 15 and a depth measuring ruler 9 for measuring the depth of electrode insertion into tissue are installed in each electrode lower arm 17. The electrode needle 15 is electrically connected to the power cord safety access port on the surface of the electrode lower arm 17. The lower end of the electrode lower arm 17 has a retractable insulating sleeve 13, and the electrode needle 15 can pass through 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 parts of the electrode needles 15 on both sides before entering the tissue are completely isolated, so as to prevent the electrode needles 15 from being exposed to the air and causing breakdown discharge.

[0025] The novel nanosecond pulse safety electrode is shaped like a compass as a whole. The electrode handle 2 may also be provided with a joint 1 having threads, and the joint 1 is connected to the electrode holder nut by a spiral connection to reduce wear. The upper ends of the two electrode upper arms 3 are mounted on the electrode handle 2 through an axis, or they may be mounted on the electrode handle 2 through two parallel axes, so that the electrode upper arms 3 can rotate freely relative to the electrode handle 2. In addition, there is a fixing screw 4 at the lower end of the electrode upper arm 3, and the electrode lower arm 17 adopts a transparent plastic structure, with a ring on the head, which can be inserted into the fixing screw 4 of the electrode upper arm 3, and the angle with the electrode upper arm 3 can be freely adjusted, and fixed to the surface of the upper arm by a nut. The angle between the upper and lower arms of the electrode is adjustable through a spiral connection, which can ensure that when the angle of the upper arms 3 of the electrodes on both sides changes, the lower arms on both sides always remain parallel.

[0026] In one embodiment of the present application, the power cord safety access port is a metal screw 5 fixed on the surface of the electrode lower arm 17, and the metal ring 5' end of the power connection line connected to the metal screw 5 is fixed to the surface of the electrode lower arm 17 through a plastic nut 6, and the edge of the plastic nut 6 completely covers the metal ring 5' of the power connection line, thereby avoiding contact with the operator. The metal ring 5' of the power connection line here is derived from the existing crocodile clip.

[0027] In one embodiment of the present application, the needle distance measuring ruler 7 is a plastic round rod with a scale on the surface. The needle distance measuring ruler 7 passes through the side hole 12 on the side of the electrode lower arm 17, and the needle distance measuring ruler 7 is fixed to the electrode lower arm 17 by screwing the first fixing knob 8 into the threaded hole in front of the electrode lower arm 17. After zeroing, the needle distance of the electrode needles 15 on both sides is obtained by reading the scale corresponding to the needle distance measuring ruler 7 of the electrode needles 15, and the needle distance can be adjusted arbitrarily.

[0028] In one embodiment of the present application, the insulating sleeve 13 is a pleated and freely retractable insulating soft sleeve, shaped like a dress. The insulating sleeve 13 is made of Teflon.

[0029] In one embodiment of the present application, the upper end of the insulating sleeve 13 is fixed to the lower end of the electrode lower arm 17, and the lower end is a soft rubber insulating suction cup 14 that can be adsorbed on the surface of tissue or organ. The lower end of the depth measuring ruler 9 is fixedly connected to the upper surface of the suction cup, and a small hole is opened on the bottom surface of the suction cup for the electrode needle 15 to pass through.

[0030] In one embodiment of the present application, the depth measuring ruler 9 is a hollow transparent plastic round rod, and the electrode needle 15 is located inside the round rod.

[0031] In one embodiment of the present application, a fixed ring 10 is fixed inside the electrode lower arm 17, and the inner diameter is similar to the depth measuring ruler 9, and the inner surface is smooth, so that the depth measuring ruler 9 can freely pass through it longitudinally. The depth measuring ruler 9 is slidably set in the fixed ring 10. In addition, a circular hole 16 is opened at the lower end of the electrode lower arm 17 for the depth measuring ruler 9 to pass through, so that the depth measuring ruler 9 cannot move horizontally, but can move freely longitudinally. The electrode lower arm 17 is made of transparent insulating material.

[0032] In one embodiment of the present application, the surface of the depth measuring ruler 9 has a scale. When the zero scale is facing the lower surface of the fixed ring 10, the tip of the electrode needle 15 is just in the same plane as 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 insertion depth is set, the depth measuring ruler 9 is fixed by the second fixing knob 11 in front of the lower electrode arm 17.

[0033] The connector 1 is connected to the electrode bracket, and the angle between the two electrode upper arms 3 is adjusted. The lower arms 17 of the electrodes on both sides are inserted into the fixing screws 4 on the surface of the upper arms 3 of the electrodes, and the lower arms on both sides are kept parallel. Then the needle distance measuring ruler 7 is passed through the side hole 12 on the side of the lower arm of the electrode, and after the 0 scale line is aligned with the electrode needle on one side, the lower arms of the electrodes on both sides are adjusted to make the electrode needle distance on both sides reach the target value, and then the needle distance scale is fixed by rotating the first fixing knob 8 inward. After that, the upper arms 3 of the electrodes on both sides and the lower arms 17 of the electrodes are fixed by fixing screws 4 and nuts. Next, the metal rings 5' of the two power connection wires are inserted into the screws 5 of the power cord access port, and are fixed by the plastic nut 6 of the power cord access port. At this time, the edge of the plastic nut 6 completely covers the metal rings 5' of the power connection wire, which can effectively protect the personal safety of the operator. When the insulating sucker 14 and the needle tip of the electrode needle 15 are located in the same plane, the 0 scale line of the depth measuring ruler 9 is directly opposite to the lower surface of the fixing ring 10. By stretching the insulating sleeve 13, the length of the electrode needle exposed outside the insulating sucker 14 is adjusted, that is, the scale shown by the depth measuring ruler 9. After adjusting the insertion depth to the target value, the depth measuring ruler 9 is fixed by the second fixing knob 11. Finally, the exposed part of the electrode needle is inserted into the animal tissue, close to the rubber insulating sucker 14, and the nanosecond pulse power supply is started to conduct the experiment. Because the electrode needle 15 is completely wrapped in the animal tissue and the insulating sucker 14, it will not produce air breakdown discharge due to contact with the outside air. At the same time, after fixing the depth measuring ruler 9 and attaching the insulating sucker 14, the depth of the electrode needle 15 inserted into the tissue can remain completely unchanged during the experiment.

[0034] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A nanosecond pulse safety electrode, characterized in that: It comprises two electrode upper arms, the upper ends of the two electrode upper arms are mounted on the electrode handle, an electrode lower arm is mounted on the lower end of each electrode upper arm, a needle distance measuring ruler is mounted between the two electrode lower arms, an electrode needle and a depth measuring ruler for measuring the depth of electrode insertion into tissue are mounted in each electrode lower arm, the electrode needle is electrically connected to a power line safety access port on the surface of the electrode lower arm, the lower end of the electrode lower arm has a retractable insulating sleeve, the electrode needle can pass through the insulating sleeve, and when the insulating sleeve is not compressed, the electrode needle is wrapped by the insulating sleeve; The power cord safety access port is a metal screw fixed on the surface of the lower arm of the electrode, and the metal ring end of the connected power connection 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 connection line; the insulating sleeve is a folded and freely retractable insulating soft sleeve; The upper end of the insulating sleeve is fixed to the lower end of the electrode lower arm, and its lower end is a soft rubber insulating suction cup that can be adsorbed on the surface of tissue or organ. The lower end of the depth measuring ruler is fixedly connected to the upper surface of the suction cup, and a small hole is opened on the bottom surface of the suction cup for the electrode needle to pass through; the electrode lower arm is made of transparent insulating material.

2. The nanosecond pulse safety electrode according to claim 1, characterized in that: The needle distance measuring ruler is a plastic round rod with scales on the surface. The needle distance measuring ruler passes through the round hole on the side of the electrode lower arm and is fixed on the electrode lower arm by screwing the first fixing knob into the threaded hole in front of the electrode lower arm.

3. The nanosecond pulse safety electrode according to claim 1, characterized in that: The depth measuring ruler is a hollow transparent plastic round rod, and the electrode needle is located inside the round rod.

4. The nanosecond pulse safety electrode according to claim 1, characterized in that: A fixed ring is fixed inside the lower arm of the electrode, and a depth measuring ruler is slidably arranged in the fixed ring.

5. The nanosecond pulse safety electrode according to claim 4, characterized in that: The surface of the depth gauge has scales. When the zero scale faces the lower surface of the fixed ring, the tip of the electrode needle is just in the same plane as the suction cup. After the insertion depth is set, the depth gauge is fixed by the second fixing knob in front of the lower arm of the electrode.

6. The nanosecond pulse safety electrode according to claim 1, characterized in that: The insulating sleeve is made of Teflon.

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