CN114376722A - Radio frequency and low temperature plasma operation electrode - Google Patents
Radio frequency and low temperature plasma operation electrode Download PDFInfo
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- CN114376722A CN114376722A CN202210292494.XA CN202210292494A CN114376722A CN 114376722 A CN114376722 A CN 114376722A CN 202210292494 A CN202210292494 A CN 202210292494A CN 114376722 A CN114376722 A CN 114376722A
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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
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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
- A61B2018/00583—Coblation, i.e. ablation using a cold plasma
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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
- A61B2018/00589—Coagulation
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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
- A61B2018/1405—Electrodes having a specific shape
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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
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1412—Blade
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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
- A61B2018/1467—Probes or electrodes therefor using more than two electrodes on a single probe
Abstract
The invention provides a radio frequency and low temperature plasma operation electrode and a system, which are used for ablation and blood coagulation during operation, wherein the operation electrode comprises 3 electrodes, a guide tube, a telescopic handle and a circuit unit, the number of the electrodes comprises an electrode tip, an insulating layer and an electrode wire, the electrodes are symmetrically arranged, the electrode system also comprises a hollow cylindrical third electrode arranged outside the insulating layer, the operation electrode system comprises an operation electrode, a control module and an output module, and the benefits of 2 modes of radio frequency blood coagulation and low temperature plasma ablation can be effectively combined into a single device by connecting the 3 electrodes in series or in parallel.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an active medical instrument for operation, and particularly relates to a radio-frequency and low-temperature plasma operation electrode which is matched with a radio-frequency plasma operation host machine for use.
Background
At present, the radio-frequency electrode and the plasma electrode are used together with different electrosurgical equipment at present, for example, low-temperature plasma equipment can only support the plasma electrode to perform body surface ablation, and radio-frequency equipment can only support a low-power electrode to perform blood coagulation operation. Although there are also many electrodes called "rf plasma electrodes", the electrodes are still required to be replaced between different electrodes, i.e. between rf electrodes and plasma electrodes, and frequent electrode replacement during the operation not only prolongs the operation time, but also increases the treatment cost of the patient.
In the current electrode products in the market, the electrode tips are still two symmetrical bean-shaped electrode tips with a small gap between the electrode tips, and the electrode is only suitable for coagulation and ablation in a small range and is relatively limited in clinical application; the bean-shaped electrode head can only generate small energy current, so that the action surface of the small current on the operation of the operation part is narrow and the action depth is shallow when hemostasis and ablation are carried out, the operation time is further prolonged, and the pain of a patient is increased; however, when the electrodes release large energy, on one hand, the insulating layer between the two electrodes can be broken down, the ionized layer cannot be generated, the plasma ablation function cannot be realized, and the electrode short circuit can be caused by the fact that the energy can not be released and the energy is too large, and even the harm of falling of the electrodes into a human body is caused. On the other hand, the high temperature generated by the electrode tip can not only adhere to biological tissues, but also cause side effects caused by tissue damage such as tissue necrosis and degeneration after operation. Therefore, there is a need for rf plasma electrodes with improved control of low temperature operating environments, simplified switching between rf plasmas, expanded number of stages on the same electrode, and improved adaptability of the electrode to the device.
Disclosure of Invention
It is an object of the present invention to at least partially overcome the disadvantages of the prior art and to provide a radio frequency and cryogenic plasma multi-stage surgical electrode.
In order to achieve one of the above purposes, the invention provides the following technical scheme:
a radio frequency and cryogenic plasma surgical electrode comprising: the electrode, guide tube, telescopic handle and circuit unit, wherein there are 3 electrodes, including electrode tip, insulating layer and electrode wire, set up in the guide tube movably; the first electrode tip and the second electrode tip are connected with the corresponding first electrode wire and the second electrode wire, and the first electrode tip and the second electrode tip are symmetrically arranged and can be in a semi-column shape, a sheet shape or a protruding semi-sphere shape; 2 mutually independent pore channels are arranged in the insulating layer and used for accommodating the electrode wires, and the 2 electrode wires are arranged in the pore channels and are respectively insulated and separated; the third electrode is a hollow cylindrical structure extending out of the guide pipe and exposed, is arranged outside the insulating layer, and is 0.5-5 mm away from the first electrode tip and the second electrode tip; the guide tube is of a hollow cylindrical structure with openings at two ends, one end of the guide tube is used for accommodating an electrode, and the other end of the guide tube is fixedly connected with the telescopic handle; the telescopic handle is used for fixing the guide tube at one end and fixing the circuit unit at the other end, connecting the electrode in the guide tube with the circuit unit and controlling the electrode to extend out of or retract into one end of the guide tube far away from the telescopic handle; and the circuit unit comprises a cable and a power plug and is used for providing an electric signal for the electrode.
According to a preferred embodiment of the present invention, the insulating layer is further provided with a protruding step surface at the front end portion of the third electrode tip to enhance insulation from the first electrode tip and the second electrode tip.
According to a preferred embodiment of the present invention, the outer diameter of the widest part of the insulating layer is smaller than the inner diameter of the guide tube and not smaller than the outer diameter of the third electrode.
According to a preferred embodiment of the present invention, the third electrode has an outer diameter smaller than an inner diameter of the guide tube, the third electrode and the guide tube form a relatively slidable gap, and the electrode is parallel to the guide tube and can be completely retracted into the guide tube.
According to a preferred embodiment of the present invention, one end of each of the first electrode wire and the second electrode wire is fixedly connected to the corresponding electrode tip, the other end of each of the first electrode wire and the second electrode wire respectively passes through a hole provided inside the insulating layer inside the guide tube and is fixedly connected to the cable of the circuit unit, and the third electrode is fixed outside the insulating layer, and one end of the third electrode near the telescopic handle is directly and fixedly connected to the cable of the circuit unit.
According to a preferred embodiment of the invention, the guide tube is a flexible insulating tube, a part of the tube section at one end of the guide tube fixed with the telescopic handle is sleeved with an outer sheath tube, and the outer sheath tube is a hard tube.
According to a preferred embodiment of the invention, the inner layer of the guide tube is coated with a high stability coating.
A radio frequency and low temperature plasma operation electrode system comprises the radio frequency and low temperature plasma operation electrode, a control module and an output module, wherein the control module is used for receiving an instruction of a working mode and controlling the output module to output an electric signal of the instruction corresponding to the working mode; the output module is used for outputting an electric signal of a command corresponding to the working mode under the control of the control module; the operation electrode is used for receiving the electric signal output by the output module and executing corresponding radio frequency energy and low-temperature plasma energy; accordingly, the operating modes include a radio frequency operating mode and a plasma operating mode.
According to a preferred embodiment of the present invention, the output module includes a control subunit, a high voltage driving unit, a transformer and an output interface; the control subunit is used for controlling the working state output by the output interface, namely whether to enter a working mode corresponding to the instruction; the high-voltage driving unit is used for converting a direct current signal of a high-voltage power supply into an alternating current signal; the transformer is used for converting the alternating current signal converted by the high-voltage driving unit into a high-frequency high-voltage alternating current signal; the output interface is used for being connected with the operation electrode and outputting the electric signal corresponding to the working mode to the circuit unit of the operation electrode; the output interface realizes the output of corresponding radio frequency energy and low-temperature plasma energy by switching the series connection or the parallel connection of the first electrode and the second electrode.
According to a preferred embodiment of the invention, the output module comprises: the plasma power supply comprises an output filter circuit, wherein the output filter circuit is used for filtering a high-frequency high-voltage alternating current signal converted by a transformer and outputting the filtered high-frequency high-voltage alternating current signal in a plasma working mode; the power amplifier is used for carrying out power amplification processing on the high-frequency high-voltage alternating current signal converted by the transformer and then outputting the high-frequency high-voltage alternating current signal in a radio frequency working mode.
The invention has the beneficial effects that:
the invention discloses a radio frequency and low temperature plasma operation electrode, which comprises 3 electrodes, not only can realize the function conversion of a single pole and a double pole, but also can realize the conversion of the radio frequency and the plasma, thereby not only effectively avoiding the frequent electrode replacement, but also simultaneously finishing the double functions of double pole blood coagulation and ablation through switching during the operation, shortening the operation time and reducing the treatment cost generated by replacing a plurality of electrodes.
The third electrode introduced by the invention is of a hollow cylindrical structure and is arranged outside the insulating layer, and the whole third electrode has conductivity. Because the third electrode of the whole hollow cylindrical structure has conductivity, a corresponding electrode wire is not arranged, and high-power electric plasma ablation can be completed. Because the electrode generally will set up the electrode wire fixedly connected with electrode head, if according to conventional setting, introduce the third electrode, need make 3 lumen tubes inside the insulating layer, on the one hand prepare 3 lumen tube craft complicated, on the other hand receive the restriction of the whole pipe diameter of electrode guide tube, compared with the traditional 2 lumen tubes comprising 2 electrodes, 3 lumen tube bore diameter is smaller, the electrode wire that wherein penetrates is thinner, the electric current that the electrode wire can bear is smaller, thus the conducting power is smaller, further will limit time and efficiency of the operation. Although the third electrode is introduced, the conductivity of the outer tube of the whole electrode does not need to increase 1 corresponding conductivity, so that the maximum power of the final low-temperature plasma ablation can reach 120W, which is more than 2 times of the maximum power of the conventional electrode plasma.
The first electrode tip and the second electrode tip are symmetrically arranged like a conventional electrode, so that the operation habit of a doctor is met; however, the double electrodes are symmetrical bean-shaped electrode heads, the action area is small, the double electrodes arranged in the invention can be semi-cylindrical, sheet-shaped or protruded hemispherical, and compared with the bean-shaped double electrodes, the double electrodes have larger action surface, can bear larger power current, have higher power and have higher and faster efficiency during operation.
The third electrode is a third electrode tip formed by controlling the exposed part of the electrode after the electrode extends out of the guide tube through the telescopic handle, and the distance between the third electrode tip and the first electrode tip and between the third electrode tip and the second electrode tip is ensured to be at least 0.5mm, so that the electrode is relatively safer; the insulating layer is also provided with a protruded step surface, so that the insulating isolation of the third electrode tip from the first electrode tip and the second electrode tip is further enhanced, and the safety is higher; the outer diameter of the insulating layer is not smaller than that of the third electrode, so that the third electrode tip is further ensured to be physically separated from the first electrode tip and the second electrode tip.
The outer diameter of the widest part of the insulating layer is smaller than the inner diameter of the guide pipe, and the outer diameter of the third electrode is smaller than the inner diameter of the guide pipe, so that all the electrodes can be arranged in the guide pipe; on the one hand, the clearance that third electrode and stand pipe formed the relative slip, and telescopic handle department is through setting up the push rod of connecting the electrode and promoting whole electrode and be concertina movement, the electrode is parallel with the stand pipe, certain angle bending's structure is not established to the electrode tip, thereby realize that the electrode can all retract the stand pipe inside smoothly, also can avoid the friction that flexible angle pipe caused the stand pipe when the operation of stretching out or retracting, the sliding action that this kind of parallel structure brought is more smooth, and the electrode can all retract the structure inside the stand pipe and guaranteed that the operation is visited the in-process of effect target spot and can not discharge by accident, it is safer. On the other hand, the inner layer of the guide tube is coated with a high-stability coating, which is generally a coating material with high stability, non-stickiness, acid and alkali resistance, insulativity and wear resistance, so that the service life, insulativity, safety and effectiveness of the guide tube in the operation electrode can be further enhanced, and the interference caused by burnt, damaged and adhered flocculent tissues in work is avoided.
The fixed connection of the electrode head and the electrode wire, the electrode wire and the cable, the third electrode and the insulating layer/cable, the guide tube and the telescopic handle, the telescopic handle and the push rod and the electrode can further ensure that the potential danger that parts fall off and remain in the body caused by high-power operation in the process of performing operation on the electrode in the body can be further avoided.
The flexible insulating pipe is selected as the guide pipe which goes deep into the action target (inside the human body), on one hand, the flexible material can ensure that the flexible insulating pipe is more fit with the changing environment in the body, and the damage outside the non-action target part is avoided; on the other hand, the insulating tube can further insulate and isolate accidental damage caused by accidental discharge of the third electrode tightly attached to the inside of the guide tube. In addition, the hard outer sheath pipe is sleeved on the periphery of a part of pipe section at one end, fixed by the guide pipe and the telescopic handle, of the guide pipe, because a part of operation probing parts, such as orthopedic operations, have certain hardness, the fully flexible guide pipe probing operation is relatively laborious, the hard outer sheath pipe of the part of pipe section is arranged for protection, and a certain supporting force is given, so that the successful penetration and the proceeding of the probing operation at the initial stage of the operation can be promoted, the poking force of the guide pipe in the probing process is increased, the preparation positioning of an operation action target point is improved, and the operation quality is improved.
The radio frequency and low temperature plasma operation electrode really realizes the effective fusion of 2 operation modes of radio frequency and plasma, can use the double-electrode head at the end part of the electrode to carry out radio frequency coagulation, or connect the double electrodes at the end part in parallel into one path of electrode, and form a loop through a third electrode at the other path to carry out plasma ablation, thereby effectively reducing the use amount of electrodes with different energy types in the operation. In addition, the operation of different action areas can be realized through the conversion of the electrode tip, namely when the electrode tip is applied to small-area action points such as ear, nose, throat, nerves and the like, the blood coagulation function of an electrothermal effect can be selected, and because the action area is small, the continuous action time is short, and high-temperature harm cannot be generated; when a large-area operation is needed, compared with radio frequency ablation, the double electrodes at the front end are connected in parallel, and the low-temperature plasma ablation mode is completed with the third electrode, so that high temperature cannot be generated, and high-temperature damage caused by long-time action of adhesion of high temperature to normal living flocculent tissues, postoperative tissue necrosis, degeneration and the like is effectively avoided.
The invention provides a radio frequency and low-temperature plasma operation electrode, which combines the benefits of 2 modes of radio frequency coagulation and low-temperature plasma ablation into a single device by introducing a hollow cylindrical third electrode arranged outside an insulating layer, accords with the operation habit of a doctor on the premise of ensuring safety, and saves the operation cost.
The invention also provides a radio frequency and low temperature plasma operation electrode system, which comprises a radio frequency and low temperature plasma operation electrode, a control module and an output module; the output module comprises a control subunit, a high-voltage driving unit, a transformer and an output interface; in the output module: the plasma working mode also comprises an output filter circuit; when in the radio frequency working mode, the power amplifier is also included. The operation electrode system is essentially a device integrating a plasma system and a radio frequency ablation system. The integrated equipment can realize free switching of a radio frequency bipolar coagulation mode and a plasma bipolar ablation mode, so that doctors can conveniently select different modes in the operation according to needs to complete different operations, the requirements of various treatment schemes such as low-temperature plasma ablation of flocculent tissues and radio frequency ablation coagulation under an endoscope for various minimally invasive operations are met, and the operation requirements of a plurality of departments (such as orthopedics, otolaryngology, head and neck department, gynecology, pain department and the like) can be met.
Drawings
FIG. 1 is a schematic structural view of a radio frequency and cryogenic plasma surgical electrode of the present invention;
FIG. 2 is an enlarged view of a portion of an electrode 1 of a radio frequency and cryogenic plasma surgical electrode of the present invention;
FIG. 3 is a partial cross-sectional view of an electrode 1 of a radio frequency and cryogenic plasma surgical electrode of the present invention;
FIG. 4 is a graph of the maximum power of a RF and cryogenic plasma surgical electrode of the present invention;
FIG. 5 is a block diagram of a RF and low temperature plasma surgical electrode system in accordance with the present invention;
wherein, 1, an electrode; 11. a first electrode tip; 12. a second electrode tip; 13. a third electrode tip; 14. an insulating layer; 15. a first electrode line; 16. a second electrode line; 2. a guide tube; 3. a telescopic handle; 4. a circuit unit; 41. a cable wire; 42. and a power plug.
Detailed Description
Exemplary embodiments of the present invention will hereinafter be described in detail with reference to the accompanying drawings, wherein like or similar reference numerals denote like or similar elements. Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
According to the general concept of the present invention, there is provided a radio frequency and cryogenic plasma surgical electrode, comprising: the electrode device comprises three electrodes, a guide pipe, a telescopic handle and a circuit unit, wherein the three electrodes comprise electrode tips, insulating layers and electrode wires and are movably arranged in the guide pipe; the first electrode tip and the second electrode tip are connected with the corresponding first electrode wire and the second electrode wire; two mutually independent pore channels are arranged in the insulating layer and used for accommodating the electrode wires, and the two electrode wires are arranged in the pore channels and are respectively insulated and separated; the third electrode is a hollow cylindrical structure and is arranged outside the insulating layer, and the whole third electrode has conductivity; the electrode can extend out of or retract into the guide tube under the control of the telescopic handle, and the guide tube is used for accommodating the electrode; the telescopic handle is used for fixing the guide tube at one end and fixing the circuit unit at the other end, connecting the electrode in the guide tube with the circuit unit and controlling the electrode to extend out of or retract into one end of the guide tube, which is far away from the telescopic handle; and the circuit unit comprises a cable and a power plug and is used for providing electric signals for the electrodes. According to the invention, the hollow cylindrical third electrode arranged outside the insulating layer is introduced, so that the benefits of 2 modes of radio frequency coagulation and low-temperature plasma ablation are combined into a single device, on the premise of ensuring safety, the operation habit of a doctor is met, and the operation cost is saved.
Fig. 1 shows a schematic structural diagram of a radio frequency and low temperature plasma surgical electrode of the present invention, which includes an electrode 1, a guide tube 2, a telescopic handle 3 and a circuit unit 4, wherein the electrode 1 is movably disposed at one end of the guide tube 2, the other end of the guide tube 2 is fixedly connected with the telescopic handle 3, one end of the telescopic handle 3 fixes the guide tube 2, the other end fixes the circuit unit 4, and connects the electrode 1 in the guide tube 2 with the circuit unit 4, the control electrode 1 extends out of or retracts into one end of the guide tube 2 far away from the telescopic handle 3, and the circuit unit 4 includes a cable 41 and a power plug 42 for providing an electric signal to the electrode 1.
The structure of the electrode 1 is the core invention point of the present invention, and the detailed structure is detailed in a partial enlarged view of the electrode 1 shown in fig. 2, specifically: the electrode 1 includes an electrode head, an insulating layer 14 and an electrode wire, the electrode 1 is shown as having three, the corresponding electrode heads are a first electrode head 11, a second electrode head 12 and a third electrode head 13, wherein, as is apparent from fig. 2, the first electrode head 11 and the second electrode head 12 are symmetrically arranged in a semi-column shape, and are insulated and separated by the insulating layer 14, the first electrode head 11 and the second electrode head 12 may also be shaped in a symmetrical sheet shape to wrap the outer periphery of the insulating layer 14, or in a protruding semi-spherical shape to be symmetrically arranged at both ends of the insulating layer 14, and furthermore, the shapes of the first electrode head 11 and the second electrode head 12 are not limited to the semi-column shape, the sheet shape or the semi-spherical shape, and may also be a cone shape, a triangle shape, etc.; the third electrode is arranged in the guide tube 2, and when the third electrode extends out of the guide tube 2, an exposed part of the third electrode forms a third electrode tip 13 which keeps a certain distance with the first electrode tip 11 and the second electrode tip 12, and the distance ranges from 0.5mm to 5mm according to different specifications of the electrode 1; the insulating layer 14 is provided with a protruding step surface at the end of the third electrode head 13 remote from the guide tube 2 to enhance the insulation separation from the first electrode head 11 and the second electrode head 12; the outer diameter of the widest part (i.e. the position of one protruded step surface) of the insulating layer 14 is smaller than the inner diameter of the guide tube 2 and is larger than or equal to the outer diameter of the third electrode head 13, and meanwhile, the outer diameter of the third electrode is required to be smaller than the inner diameter of the guide tube 2, the end part of the electrode 1 of the invention is not provided with a bent structure with a certain angle (such as commonly used 45 degrees), the whole electrode 1 is parallel to the guide tube 2, and a gap capable of sliding relatively exists between the third electrode and the guide tube 2, so that the electrode 1 can be ensured to be completely retracted into the guide tube 2.
Fig. 3 is a partial cross-sectional view of an electrode 1 of a radio frequency and low temperature plasma surgical electrode of the present invention, wherein a first electrode tip 11 and a second electrode tip 12 are symmetrically disposed in a semi-cylindrical shape, and are insulated and separated by an insulating layer 14; the whole hollow cylindrical structure of the third electrode has conductivity, so a separate third electrode wire is not arranged, the third electrode is fixed outside the insulating layer 14, the outer diameter of the third electrode is smaller than the inner diameter of the guide tube 2, a gap capable of sliding relatively is formed between the third electrode and the guide tube 2, and the exposed part of the third electrode which extends out of the guide tube 2 in a sliding way forms a third electrode tip 13; furthermore, the third electrode tip 13 is kept at a certain distance from the first electrode tip 11 and the second electrode tip 12, and the insulating layer 14 is provided with a protruding step surface at the end of the third electrode tip 13 away from the guide tube 2, so as to enhance the insulation separation from the first electrode tip 11 and the second electrode tip 12; as is evident from the sectional view of fig. 3: the insulating layer 14 is provided with 2 independent pore canals, the first electrode wire 15 and the second electrode wire 16 are respectively and independently arranged in the pore canals, one end of each electrode wire is fixedly connected with the corresponding first electrode tip 11 and the corresponding second electrode tip 12, and the other end of each electrode wire respectively penetrates through the pore canals arranged in the insulating layer 14 in the guide pipe 2.
The electrode 1 can be matched with conventional radio frequency equipment to realize the function of radio frequency blood coagulation and low-temperature plasma equipment to realize the function of low-temperature plasma ablation, can also be matched with special radio frequency and low-temperature plasma equipment to simultaneously realize the conversion between radio frequency energy and low-temperature plasma energy, and has wider matching degree to the equipment.
The radio frequency and low temperature plasma's of this embodiment operation electrode belongs to a 3 electrode, and first electrode line 15, second electrode line 16, insulating layer 14, third electrode and stand pipe 2 are symmetrical structure to parallel arrangement, first electrode tip 11, second electrode tip 12 and third electrode adopt titanium nickel alloy to make, and memory material is chooseed for use to this titanium nickel alloy, and material stability is good, can also more laminate the effect position during the effect.
In a preferred embodiment of the present invention, the first electrode tip 11, the second electrode tip 12 and the third electrode of the radio frequency and low temperature plasma surgical electrode are made of stainless steel, so that the electrode 1 is not easy to break after multiple uses. In addition, since the third electrode of the present invention has a high power and is disposed outside the insulating layer 14 and inside the guide tube 2, and the third electrode is exposed outside, when the present invention is used for plasma bipolar ablation in surgery, after a period of operation, phenomena such as charring, breakage, adhesion, etc. may be caused by the electrode 1 acting on the flocculent tissue, which may affect the patency and insulating properties inside the guide tube 2, therefore, the inner layer of the guide tube 2 of the present invention is coated with a high-stability coating, such as at least one or a combination of Polytetrafluoroethylene (PTFE), PARYLENE (PARYLENE), or other organic and/or inorganic materials having high stability, non-adhesiveness, acid and alkali resistance, insulating properties, and wear resistance. Such as: polytetrafluoroethylene (PTFE) is a high molecular polymer of tetrafluoroethylene, and has high-temperature/chemical stability, sealing property, high lubrication non-sticking property, electrical insulating property and aging resistance at normal temperature and normal pressure; PARYLENE (PARYLENE) is a chemical vapor deposited poly (p-xylylene) polymer having high temperature stability, chemical stability, sealability, moisture resistance, electrical insulation, non-stick properties; therefore, the high-stability coating of the inner layer of the guide tube 2 enhances the service life of the guide tube 2, and can further enhance the insulation, safety and effectiveness of the electrode 1.
In a preferred embodiment of the present invention, the insulating layer 14 is further provided with a step surface to ensure that the distance between the third electrode tip 13 and the first electrode tip 11 and the second electrode tip 12 is 2mm, so that the insulation and isolation of the third electrode tip 13 from the first electrode tip 11 and the second electrode tip 12 are enhanced, and the safety is relatively higher; in addition, the outer diameter of the insulating layer 14 is not less than that of the third electrode, and physical separation of the third electrode tip 13 from the first and second electrode tips 11 and 12 is further ensured, which is safer.
In a preferred embodiment of the invention, one end of the electrode 1 far away from the telescopic handle 3 is not provided with a conventional bending structure, and the electrode 1 can be controlled to extend and retract by arranging a push rod which is connected with the electrode 1 and pushes the whole electrode 1 to do telescopic motion at the telescopic handle 3, and the parallel structure ensures that the sliding action is smoother because the head of the electrode 1 is not provided with a bend, so that the electrode 1 can be completely and smoothly retracted into the guide tube 2, and the friction of the head of the bent electrode 1 which is conventionally provided with a flexible material to the guide tube 2 during the extending or retracting operation is avoided to the greatest extent. The electrode 1 ensures that the head of the electrode 1 can be completely retracted into the guide tube 2, so that accidental discharge caused by the head of the electrode 1 can be avoided in the process of exploring an action target point in an operation, accidental damage is brought to non-action positions, and the operation process is relatively safer.
In a preferred embodiment of the present invention, the fixed connection in the present invention is implemented by using epoxy resin material, and includes between the electrode head and the electrode wire, between the electrode wire and the cable 41, between the third electrode and the insulating layer 14/cable 41, between the guiding tube 2 and the telescopic handle 3, between the telescopic handle 3 and the pushing rod, and between the electrodes 1. Through the adhesive connection of the components by using the epoxy resin material, the falling-off of the components caused by high-power operation can be avoided, so that unnecessary potential risks are caused by the falling-off of the components left in the body, and the safety and the stability of the electrode 1 in the process of performing operation in the body are further ensured.
In a preferred embodiment of the invention, the guide tube 2 is a flexible insulating tube made of nylon, a sheath tube is further sleeved on the periphery of a part of the tube section at one end of the guide tube 2 fixed with the telescopic handle 3, the sheath tube is a hard tube made of metal, an alloy is preferred here, the distance between the front end of the sheath tube and one end of the guide tube 2 far away from the telescopic handle 3 is 12mm, and the sheath tube can ensure that the guide tube 2 made of nylon is more labor-saving in probing operation.
In a preferred embodiment of the present invention, the power plug 42 in the circuit unit 4 can be replaced with a power adaptor for matching with radio frequency and/or plasma equipment of different electrical signals.
When the embodiment of the invention is used, two switchable circuit connections can be realized by using different devices, and the two switchable circuit connections respectively correspond to at least 3 working modes of the electrode 1. Since the voltages released by different circuits are different, the maximum currents transmitted to the first electrode, the second electrode and the third electrode are different, and fig. 4 shows that the maximum power of the radio frequency (corresponding to the low voltage of 10-100 volts) output by the first electrode and the second electrode is no different from that of the conventional electrode, and the maximum power can reach 20 watts; however, when the third electrode tip 13 is used in combination with the first electrode tip 11 or the second electrode tip 12 to realize plasma ablation (corresponding to a high voltage of 150-320 volts), it is provided that low-temperature plasma is excited between the heads of the electrodes 1, i.e. a plasma layer with high-energy charged particles is formed, when the plasma layer is in contact with a flocculent tissue, the tissue is disintegrated by means of molecular dissociation to achieve the purpose of ablation, where the maximum power of the low-temperature plasma can reach 120 watts, which is 2.4 times of the maximum power (50 watts) of the plasma function of a conventional electrode. Therefore, the electrode 1 can realize low-temperature plasma ablation, can also realize the output of different radio frequencies, and can further improve and promote the power of the third electrode, the adjustment control of the telescopic handle 3 and the conversion mode of the matching circuit unit 4 subsequently so as to be suitable for the operation application of different areas.
In addition, the invention also provides a radio frequency and low temperature plasma operation electrode system, as shown in fig. 5: a radio frequency and low temperature plasma operation electrode system comprises a radio frequency and low temperature plasma operation electrode, a control module and an output module; the control module is used for receiving the instruction of the working mode and controlling the output module to output an electric signal of the instruction corresponding to the working mode; the output module is used for outputting an electric signal of a command corresponding to the working mode under the control of the control module; the operation electrode is used for receiving the electric signal output by the output module, executing corresponding radio frequency energy and low-temperature plasma energy, and realizing 2 working modes of radio frequency bipolar coagulation and plasma bipolar ablation, namely a radio frequency working mode and a plasma working mode; the radio frequency working mode is a radio frequency bipolar coagulation mode, and the plasma working mode is a plasma bipolar ablation mode.
Furthermore, it can be seen in fig. 5 that the output module comprises a control subunit, a high voltage drive unit, a transformer and an output interface; the control subunit is used for controlling the working state output by the output interface, namely whether to enter a working mode corresponding to the instruction; the high-voltage driving unit is used for converting a direct current signal of a high-voltage power supply into an alternating current signal; the transformer is used for converting the alternating current signal converted by the high-voltage driving unit into a high-frequency high-voltage alternating current signal; the output interface is used for being connected with the operation electrodes of radio frequency and low-temperature plasma and outputting the electric signals corresponding to the working mode to the circuit unit 4 of the operation electrodes, and the output interface realizes the output of corresponding radio frequency energy and low-temperature plasma energy by switching the series connection or the parallel connection of the first electrode and the second electrode, and particularly comprises the following steps: the double electrodes at the front end of the operation electrode are connected in series, so that 1.71MHz high-frequency electromagnetic waves can be output, and the ablation blood coagulation is completed; the double electrodes at the front end of the operation electrode are connected in parallel to form one electrode, and the other electrode forms a loop through the third electrode to output low-temperature plasma energy to complete the ablation of the flocculent tissue. In addition, the output module: the plasma working mode also comprises an output filter circuit which is used for outputting the high-frequency high-voltage alternating current signal converted by the transformer after filtering treatment; and when in the radio frequency working mode, the power amplifier is also used for carrying out power amplification processing on the high-frequency high-voltage alternating current signal converted by the transformer and then outputting the high-frequency high-voltage alternating current signal.
The invention provides a radio frequency and low temperature plasma operation electrode and a system, which are used for ablation and blood coagulation during operation, and the essence is that the plasma (system) and the radio frequency ablation (system) are integrated into one operation electrode (system), and the integrated electrode or system can simultaneously complete the free switching of a radio frequency bipolar blood coagulation mode and a plasma bipolar ablation mode, so that doctors can conveniently select different modes according to needs in the operation to complete different operations, 2 optional schemes with different energies, namely the radio frequency energy and the low temperature plasma energy, are realized, and the operation requirements of a plurality of departments are met. The invention can effectively combine the benefits of 2 energy modes of radio frequency coagulation and low-temperature plasma ablation into a single device, finally realizes the purposes of meeting the operation habits of doctors and saving the operation cost on the premise of ensuring the safety, simultaneously has small occupied area of the integrated operation electrode (system), low cost and strong adaptability, and reduces the complicated purchasing process of purchasing different operation electrodes and matching power supply adaptation systems in hospitals.
Claims (10)
1. A radio frequency and cryogenic plasma surgical electrode, comprising: an electrode, a guide tube, a telescopic handle and a circuit unit, wherein,
the number of the electrodes is 3, the electrodes comprise electrode tips, insulating layers and electrode wires and are movably arranged in the guide pipe; the first electrode tip and the second electrode tip are connected with the corresponding first electrode wire and the second electrode wire, and the first electrode tip and the second electrode tip are symmetrically arranged and can be in a semi-column shape, a sheet shape or a protruding semi-sphere shape; 2 mutually independent pore channels are arranged in the insulating layer and used for accommodating the electrode wires, and the 2 electrode wires are arranged in the pore channels and are respectively insulated and separated; the third electrode is a hollow cylindrical structure extending out of the guide pipe and exposed, is arranged outside the insulating layer, and is 0.5-5 mm away from the first electrode tip and the second electrode tip;
the guide tube is of a hollow cylindrical structure with openings at two ends, one end of the guide tube is used for accommodating the electrode, and the other end of the guide tube is fixedly connected with the telescopic handle;
one end of the telescopic handle is fixed on the guide tube, the other end of the telescopic handle is fixed on the circuit unit, the electrode in the guide tube is connected with the circuit unit, and the electrode is controlled to extend out of or retract into one end of the guide tube, which is far away from the telescopic handle;
the circuit unit comprises a cable and a power plug and is used for providing electric signals for the electrodes.
2. A radio frequency and cryogenic plasma surgical electrode according to claim 1, wherein the insulating layer is further provided with a protruding step surface at the front end of the third electrode tip to enhance insulation from the first electrode tip and the second electrode tip.
3. The rf and cryogenic plasma surgical electrode of claim 1, wherein the outer diameter of the widest portion of the insulating layer is smaller than the inner diameter of the guide tube and not smaller than the outer diameter of the third electrode.
4. The rf and cryogenic plasma surgical electrode of claim 3, wherein the third electrode has an outer diameter smaller than an inner diameter of the guide tube, the third electrode forms a relatively slidable gap with the guide tube, and the electrode is parallel to the guide tube and is capable of being fully retracted inside the guide tube.
5. The radio frequency and low temperature plasma surgical electrode according to claim 1, wherein one end of the first electrode wire and one end of the second electrode wire are fixedly connected with the corresponding electrode tips, the other ends of the first electrode wire and the second electrode wire respectively penetrate through the pore channels formed in the inner insulating layer of the guide tube and are fixedly connected with the cable of the circuit unit, the third electrode is fixed outside the insulating layer, and one end of the third electrode, which is close to the telescopic handle, is directly and fixedly connected with the cable of the circuit unit.
6. The radio frequency and cryogenic plasma surgical electrode according to claim 1, wherein the guide tube is a flexible insulating tube, a partial tube section of one end of the guide tube fixed to the telescopic handle is sleeved with an outer sheath tube, and the outer sheath tube is a hard tube.
7. A radio frequency and cryogenic plasma surgical electrode according to claim 1, wherein the inner layer of the guide tube is coated with a high stability coating.
8. A radio frequency and low temperature plasma surgical electrode system, comprising the radio frequency and low temperature plasma surgical electrode of any one of claims 1-7, a control module and an output module, wherein,
the control module is used for receiving the instruction of the working mode and controlling the output module to output an electric signal of the instruction corresponding to the working mode;
the output module is used for outputting an electric signal of a command corresponding to a working mode under the control of the control module;
the operation electrode is used for receiving the electric signal output by the output module and executing corresponding radio frequency energy and low-temperature plasma energy;
accordingly, the operating modes include a radio frequency operating mode and a plasma operating mode.
9. The rf and cryogenic plasma surgical electrode system of claim 8, wherein the output module includes a control subunit, a high voltage drive unit, a transformer, and an output interface;
the control subunit is configured to control a working state output by the output interface, that is, whether to enter a working mode corresponding to the instruction;
the high-voltage driving unit is used for converting a direct current signal of a high-voltage power supply into an alternating current signal;
the transformer is used for converting the alternating current signal converted by the high-voltage driving unit into a high-frequency high-voltage alternating current signal;
the output interface is used for being connected with the operation electrode and outputting the electric signal corresponding to the working mode to the circuit unit of the operation electrode; the output interface realizes the output of corresponding radio frequency energy and low-temperature plasma energy by switching the series connection or the parallel connection of the first electrode and the second electrode.
10. The rf and cryogenic plasma surgical electrode system of claim 9, wherein the output module:
the plasma power supply comprises an output filter circuit, wherein the output filter circuit is used for filtering a high-frequency high-voltage alternating current signal converted by a transformer and outputting the filtered high-frequency high-voltage alternating current signal in a plasma working mode;
the power amplifier is used for carrying out power amplification processing on the high-frequency high-voltage alternating current signal converted by the transformer and then outputting the high-frequency high-voltage alternating current signal in a radio frequency working mode.
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