Combined radio frequency electrode

Abstract

The utility model discloses a combined radio frequency electrode, and relates to the technical field of medical instruments. The radio frequency thermal coagulation electrode integrates multiple functions of ultrasonic guidance, a temperature sensor, an impedance sensor, a nerve plexus stimulation needle, a radio frequency thermal coagulation electrode and the like. The radio frequency sleeve is composed of a needle tube, an insulating layer, a sleeve seat, a lock cap, a sheath and the like. And various head structures are provided for clinical selection. The radio frequency probe is composed of a sheath tube, an electrode wire, a probe seat, a color code tube, a wire and a plug. Wherein an ultrasonic guide mark is added at the front end of the probe, so that ultrasonic guide can be adopted when the radio frequency thermal coagulation electrode punctures and enters a target part of a human body, and the harm of ionizing radiation to a medical patient is avoided. The radio frequency sleeve and the probe are locked together through the locking sleeve seat and the probe seat. After the combined multifunctional radio frequency thermal coagulation electrode is connected with a radio frequency therapeutic apparatus, various operations such as temperature measurement, impedance measurement, electrical stimulation positioning, nerve blocking, radio frequency thermal coagulation and the like can be carried out.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a combined radio frequency electrode. Background Technology

[0002] Radiofrequency ablation technology primarily relies on radiofrequency therapy devices with ablation and cutting functions, and its treatment mechanism is mainly based on thermal effects. When radiofrequency current flows through human tissue, the rapid changes in the electromagnetic field cause polarized water molecules within the tissue to move at high speeds, generating heat—an endogenous thermal effect. This causes the water inside and outside the cells to evaporate, dry, shrink, and slough off, leading to aseptic necrosis, thereby achieving the therapeutic goal. Radiofrequency ablation electrodes are a commonly used method for treating diseases such as tumors and arrhythmias. The shape and size of radiofrequency ablation electrodes vary, allowing selection based on different conditions and surgical needs. A conventional radiofrequency ablation electrode includes a catheter, electrode, and heating device. The electrode is delivered into the patient's body through the catheter, and the heating device generates high-temperature heat energy at the electrode tip, thereby eliminating damaged tissue.

[0003] Currently, most of the radiofrequency cannulas or radiofrequency needles and radiofrequency probes or radiofrequency electrodes available for clinical use in China are supplied separately, often by different suppliers. This results in a large deviation in the position of the probe tip within the inner hole of the radiofrequency needle, leading to a large error in the temperature measurement point. Furthermore, since there is only one type of radiofrequency needle with a straight tube-like tip similar to an injection needle, and no other head shapes are available, the surface of the needle tube, from about 10mm away from the needle tip to the needle hub connection, is usually coated with an insulating layer. The above solutions have the following disadvantages: (1) The head structure is relatively simple, which cannot provide more choices for clinical use; (2) In order to ensure the dimensional accuracy of the exposed working end, the insulating layer can only be applied by first sharpening the tip and then spraying it, which makes it very easy to damage the needle tip during the spraying operation, resulting in a low yield. Therefore, in view of the above problems, this technical solution proposes a combined radiofrequency electrode. Utility Model Content

[0004] This invention provides a combined radiofrequency electrode, which is a flexible structure that allows for the detachment of a radiofrequency sheath and a radiofrequency probe. The sheath seat is connected to the probe sheath root via a three-way inner conical locking connector, allowing the probe to be inserted into the sheath and locked in place to form the combined structure. Furthermore, after combined puncture, an anesthetic can be injected through another channel of the sheath seat using a syringe or extension tube to alleviate pain during treatment. Heat-shrinkable insulating tubing replaces spray-coated insulation, maintaining production continuity and preventing damage to the radiofrequency sheath during transportation or spraying. In summary, this invention solves the problems in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model discloses a combined radio frequency electrode that integrates a radio frequency sheath, an ultrasound-guided radio frequency probe, a radio frequency electrode, and an injection port into one unit.

[0007] The radio frequency thermocoagulation electrode consists of a needle tube, an insulating tube, a sleeve seat, a locking cap, and a sheath, forming the radio frequency sleeve, and a sheath tube, electrode wire, probe seat, color mark tube, and connecting wires, forming the radio frequency probe.

[0008] Furthermore, the radio frequency sleeve and the radio frequency probe are locked together by the sleeve seat and the probe seat.

[0009] Furthermore, the cannula seat has a three-way structure, with the front end of the cannula seat fixedly connected to the needle tube and the rear end being a locking inner conical connector. The locking inner conical connector is locked to the probe seat with a locking outer conical connector. The side channel of the cannula seat has a locking inner conical connector that can connect to a syringe or a high-pressure extension tube, and the inner conical connector is equipped with a locking cap.

[0010] Furthermore, the surface of the needle tube is covered with an insulating tube, and there is an exposed end distance between the needle tip and the top of the insulating tube. The exposed end distance can be predetermined and changed according to clinical needs.

[0011] Furthermore, the needle tube may be a straight sharp needle type, a curved sharp needle type, a curved blunt needle type, or a curved sharp needle side hole type.

[0012] Furthermore, the front end of the sheath is engraved with a mesh, spiral, or regularly arranged pits for ultrasound guidance marking.

[0013] Furthermore, the top end of the sheath is a closed hemispherical shape, and the rear end is fixedly connected to the center of the locking outer circular joint of the probe seat.

[0014] Furthermore, the electrode wire is disposed in the inner hole of the sheath tube, and the outer surface of the electrode wire is covered with an insulating layer, and the inner and outer surfaces of the sheath tube are insulated; the top end of the electrode wire is connected to the top end of the inner hole of the sheath tube and is integrated with it; the rear end of the electrode wire is welded to the wire and sealed in the inner cavity of the probe seat with glue.

[0015] Furthermore, the color mark tube is made of elastic material and is sleeved on the rear end of the electrode holder and the front end of the connecting wire, used to provide an indication of the electrode's working length and to protect the wire connection end.

[0016] Furthermore, the wire extends from the rear end of the color mark tube, and the end of the wire is equipped with a plug that is integrated with the wire. The connection between the wire and the plug adopts a conical honeycomb flexible connector that can avoid damage to the connection between the wire and the plug.

[0017] The present invention has the following advantages over the prior art:

[0018] (1) The combined radio frequency electrode is a flexible structure that can be separated from the radio frequency sheath and the radio frequency probe. The sheath seat is connected to the outer conical locking connector at the root of the probe sheath by a three-way inner conical locking connector. Therefore, the probe can be inserted into the inner hole of the sheath and locked to form a combined structure, which is convenient for the installation and selection of various types of bent needles.

[0019] (2) After combined puncture, an anesthetic can be injected through another channel of the cannula seat by connecting a syringe or extension tube to relieve pain during treatment;

[0020] (3) Heat shrinkable insulating tubing was used instead of sprayed insulation, thus maintaining production continuity and avoiding damage to the radio frequency sleeve during transportation or spraying.

[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a combined radio frequency electrode according to the present invention;

[0024] Figure 2 This is a schematic diagram showing the structural and positional relationship between the tip of the sheath and the electrode wire;

[0025] Figure 3 This is an enlarged view of the head structure of the sharp-headed bent-needle RF sleeve in a specific embodiment;

[0026] Figure 4 for Figure 3 Top view of the structure;

[0027] Figure 5 This is an enlarged view of the head structure of the blunt-tipped bent-needle RF sleeve in a specific embodiment;

[0028] Figure 6 for Figure 5 Top view of the structure;

[0029] Figure 7 This is an enlarged view of the head structure of the sharp-headed bent needle with side hole radio frequency sleeve in a specific embodiment;

[0030] Figure 8 for Figure 7 Top view of the structure;

[0031] Figure 9 This is a structural diagram of the combination of radiofrequency electrode and radiofrequency ablation therapy device in this technical solution.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1—RF sheath, 11—needle tube, 12—insulating tube, 13—sheath seat, 131—locking inner conical connector, 14—locking cap, 2—RF probe, 21—sheath tube, 211—front end, 22—electrode wire, 23—probe seat, 231—locking outer circular connector, 24—color mark tube, 25—wire, 251—plug. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] In the description of this utility model, it should be understood that the terms "head", "end", "side", "rear end", "front end", "top", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] like Figure 1-9 As shown, this utility model provides a combined radio frequency electrode that integrates a radio frequency sleeve 1, an ultrasound-guided radio frequency probe 2, a radio frequency electrode, and an injection port into one unit.

[0037] The radiofrequency thermocoagulation electrode consists of a needle tube 11, an insulating tube 12, a cannula seat 13, a locking cap 14, and a sheath 15, forming a radiofrequency cannula 1, and a radiofrequency probe 2 consisting of a sheath tube 21, an electrode wire 22, a probe seat 23, a color mark tube 24, and a connecting wire 25; the insulating tube 12 is a heat-shrinkable insulating tube, specifically a FEP medical heat-shrinkable tube.

[0038] The radio frequency sleeve 1 and the radio frequency probe 2 are locked together by the sleeve seat 13 and the probe seat 23.

[0039] The cannula seat 13 has a three-way structure. The front end of the cannula seat 13 is fixedly connected to the needle tube 11, and the rear end is a locking inner conical connector 131. The locking inner conical connector 131 is locked to the probe seat 23 with a locking outer conical connector 231. The side channel of the cannula seat 13 has a locking inner conical connector 131 that can connect to a syringe or a high-pressure extension tube. The inner conical connector 131 is equipped with a locking cap 14.

[0040] The needle tube 11 is covered with an insulating tube 12. There is an exposed end distance between the needle tip of the needle tube 11 and the top of the insulating tube 12. The exposed end distance can be predetermined and changed according to clinical needs. A fixed length of exposed end is retained on the head according to clinical treatment needs.

[0041] Among them, the needle tube 11 adopts a straight sharp needle type, a curved sharp needle type, a curved blunt needle type, or a curved sharp needle side hole type.

[0042] The front end 211 of the sheath 21 is engraved with a mesh, spiral or regularly arranged pits for ultrasound guidance marking.

[0043] The top end of the sheath tube 21 is a closed hemispherical shape, and the rear end is fixedly connected to the center of the locking outer circular connector 231 of the probe seat 23.

[0044] The electrode wire 22 is disposed in the inner hole of the sheath tube 21. The outer surface of the electrode wire 22 is covered with an insulating layer, and the inner and outer surfaces of the sheath tube 21 are insulated. The top end of the electrode wire 22 is connected to the top end of the inner hole of the sheath tube 21 and is integrated with it. The rear end of the electrode wire 22 is welded to the wire 25 and sealed in the inner cavity of the probe seat 23 with glue.

[0045] The color mark tube 24 is made of elastic material and is sleeved on the rear end of the electrode holder 23 and the front end of the connecting wire 25 to provide an indication of the working length of the electrode and to protect the connection end of the wire.

[0046] Among them, the wire 25 is led out from the rear end of the color mark tube 24, and the end of the wire 25 is equipped with a plug 251 integrated with the wire 25. The connection between the wire 25 and the plug 251 adopts a conical honeycomb flexible connector that can avoid damage to the connection between the wire and the plug.

[0047] like Figure 1As shown, the insulating tube 12 houses the needle tube 11, which is installed at the end of the radiofrequency sheath 1. It is connected to the probe holder 23 via a locking inner conical connector 131 and a locking outer conical connector 231. The radiofrequency sheath 1 and the probe holder 23 are a detachable and flexible modular structure. The probe holder 23 uses a three-way inner conical locking connector to connect to the outer conical locking connector at the root of the probe sheath. Therefore, the radiofrequency probe 2 can be inserted into the inner hole of the radiofrequency probe section and locked to form a modular structure. The distance between the needle tip and the top of the insulating tube is the same, thus maintaining the temperature control accuracy during radiofrequency ablation needle electrode ablation or thermal coagulation. Simultaneously, after the combined puncture, an anesthetic can be injected through another channel of the sheath holder using a syringe or extension tube to alleviate pain during treatment.

[0048] like Figure 2 The diagram shows the positional relationship between the electrode wire 22, the sheath 21, and the tip of the sheath 211.

[0049] like Figure 3-4 As shown, the sharp-tipped curved needle makes it easy to change the puncture direction during the puncture process without having to withdraw it significantly and then adjust the direction. This makes puncture positioning easier, saves operation time, and reduces patient injury and pain.

[0050] like Figure 5-6 As shown, blunt-tipped curved needles are suitable for use in areas with dense blood vessels and / or nerves to avoid damage to blood vessels or motor nerves;

[0051] like Figure 7-8 As shown, the side-hole curved needle type is suitable for treatments where the target area requires a larger thermal coagulation range, thus replacing some of the pain treatments that originally required the double-needle mode.

[0052] Heat shrinkable insulating tubing was used instead of sprayed insulation, thus maintaining production continuity and avoiding damage to the RF tubing during transportation or spraying.

[0053] like Figure 9 As shown, when in use, it is connected to a radiofrequency ablation therapy device. The needle tube 11 at the end of the insulating tube 12 is inserted into the location of the human muscle tissue and nerve nodes, and the needle tube 11 is positioned exactly in the radiofrequency thermocoagulation area. The radiofrequency ablation therapy device transmits the heat to the end of the needle tube 11 through the electrode wire, thereby generating high-temperature heat energy at the electrode end, thereby eliminating the damaged tissue.

[0054] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A combined radio frequency electrode, characterized in that, The radio frequency thermocoagulation electrode consists of a needle tube (11), an insulating tube (12), a sleeve seat (13), a locking cap (14), and a sheath (15) forming a radio frequency sleeve (1), and a radio frequency probe (2) consisting of a sheath tube (21), an electrode wire (22), a probe seat (23), a color mark tube (24), and a connecting wire (25). The radio frequency sleeve (1) and the radio frequency probe (2) are locked together by the sleeve seat (13) and the probe seat (23); The cannula seat (13) has a three-way structure. The front end of the cannula seat (13) is fixedly connected to the needle tube (11), and the rear end is a locking inner conical connector (131). The locking inner conical connector (131) is locked to the probe seat (23) with a locking outer conical connector (231). The side channel of the cannula seat (13) has a locking inner conical connector (131) that can connect to a syringe or a high-pressure extension tube. The inner conical connector (131) is equipped with a locking cap (14). The electrode wire (22) is disposed in the inner hole of the sheath (21). The outer surface of the electrode wire (22) is covered with an insulating layer, and the inner and outer surfaces of the sheath (21) are insulated. The top end of the electrode wire (22) is connected to the top end of the inner hole of the sheath (21) and is integrated with it. The rear end of the electrode wire (22) is welded to the wire (25) and sealed with glue in the inner cavity of the probe seat (23). The wire (25) is led out from the rear end of the color mark tube (24). The end of the wire (25) is equipped with a plug (251) that is integrated with the wire (25). The connection between the wire (25) and the plug (251) adopts a conical honeycomb flexible connector that can avoid damage to the connection between the wire and the plug.

2. The combined radio frequency electrode according to claim 1, characterized in that, The needle tube (11) is covered with an insulating tube (12), and there is an exposed end distance between the needle tip of the needle tube (11) and the top of the insulating tube (12).

3. The combined radio frequency electrode according to claim 1, characterized in that, The front end (211) of the sheath (21) is engraved with a mesh, spiral or regularly arranged pits for ultrasound guidance marking.

4. A combined radio frequency electrode according to claim 1, characterized in that, The top of the sheath (21) is a closed hemispherical shape, and the rear end is fixedly connected to the center of the locking outer circular joint (231) of the probe seat (23).

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