Monopole electrocoagulation needle for breaking dura mater and electrocoagulation needle assembly

Abstract

The utility model provides a monopole electrocoagulation needle and electrocoagulation needle assembly for breaking the dura mater in minimally invasive surgery, the electrocoagulation needle comprises a puncture part and a rod part connected with the puncture part, the diameter R1 of the puncture part is smaller than the diameter R2 of the rod part, and both the puncture part and the rod part are made of conductive hard materials. The puncture part and the rod part which are made of the hard conductive materials are used as conductive parts to introduce high-frequency electricity into tissues, and are also directly used as the needle body to maintain higher strength of the needle body, so that the condition that the needle body slips when entering a skull is avoided; moreover, the diameter of the puncture part is smaller than that of the rod part, and only the puncture part enters a skull hole in the puncture process, so that accidental injury to a patient due to the fact that the electrocoagulation needle deeply enters the skull is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a monopolar electrocoagulation needle and an electrocoagulation needle assembly for breaking open the dura mater. Background Art

[0002] During brain surgery, it is necessary to use an electrocoagulation needle to burn and break certain biological tissues (such as the dura mater and arachnoid membrane) to construct a "minimally invasive" surgical approach, or to further perform electrocoagulation hemostasis, cutting and other operations.

[0003] The current electrocoagulation needle includes a conductive inner core and two or more layers of plastic sleeves (or plastic sheaths) covering the conductive inner core. The conductive inner core is used to conduct high-frequency electricity into the tissue and release it through the discharge end. The plastic sleeve or plastic sheath covers the non-discharge end to prevent leakage. During minimally invasive surgery, only a skull hole with a very small diameter is drilled on the skull. The electrocoagulation needle of the prior art is easily deformed when entering the skull, and the electrocoagulation needle may slip on the skull surface. Especially when there is a large angle between the surgical approach and the skull, it is even more difficult for the electrocoagulation needle to enter the skull hole, and the doctor needs to repeatedly try to "enter the hole", which increases the time consumption of the operation and is also likely to cause additional damage to the patient.

[0004] In order to overcome the defects in the prior art that the electrocoagulation needle easily slips on the skull surface and is difficult to enter the surgical approach, the utility model provides a monopolar electrocoagulation needle and an electrocoagulation needle assembly for breaking the dura mater. Utility Model Content

[0005] In order to overcome the defects in the prior art that the electrocoagulation needle easily slips on the skull surface and is difficult to enter the surgical approach, the utility model provides a monopolar electrocoagulation needle and an electrocoagulation needle assembly for breaking the dura mater.

[0006] The utility model provides a monopolar electrocoagulation needle for breaking the dura mater, comprising a puncture portion and a rod portion connected to the puncture portion, wherein the diameter R1 of the puncture portion is smaller than the diameter R2 of the rod portion, and both the puncture portion and the rod portion are made of conductive hard material.

[0007] According to a monopolar electrocoagulation needle provided by the utility model, the conductive hard material is an alloy or conductive plastic with a hardness greater than 150hb.

[0008] According to a monopolar electrocoagulation needle provided by the utility model, the alloy is selected from any one of the following: austenitic stainless steel, copper-tungsten alloy, titanium alloy, nickel-titanium alloy; the conductive plastic is selected from any one of the following: carbon fiber reinforced plastic, or polyaniline, polystyrene or polyimide doped with conductive filler.

[0009] According to the monopolar electrocoagulation needle provided by the utility model, the range of the diameter R1 is 0.8≤R1≤2mm, and the range of the diameter R2 is 2.2mm≤R2≤2.5mm.

[0010] According to the monopolar electrocoagulation needle provided by the utility model, the length of the puncture portion is less than 60 mm, and the length of the rod portion is less than 250 mm.

[0011] According to the monopolar electrocoagulation needle provided by the utility model, the connection between the puncture part and the rod part has a smooth transition.

[0012] According to the monopolar electrocoagulation needle provided by the utility model, the rod portion is also coaxially provided with a handle.

[0013] According to the monopolar electrocoagulation needle provided by the utility model, a scale mark is arranged on the surface of the monopolar electrocoagulation needle.

[0014] According to the monopolar electrocoagulation needle provided by the utility model, the surface of the monopolar electrocoagulation needle is covered with an insulating coating.

[0015] According to the monopolar electrocoagulation needle provided by the utility model, the insulating coating is made of polyperfluoroethylene propylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl fluoride, perfluoroalkyl nylon, polyimide, polyurethane or KNM1000 sprayed ceramic.

[0016] The utility model also provides an electrocoagulation needle assembly, comprising a control switch, a power supply module and any one of the above-mentioned monopolar electrocoagulation needles.

[0017] The electrocoagulation needle and electrocoagulation needle assembly for brain puncture of the utility model have at least the following beneficial effects:

[0018] 1. The puncture part and the rod part made of hard conductive material not only serve as conductive parts to conduct high-frequency electricity into the tissue, but also directly serve as the needle body to maintain a high needle body strength, avoiding slipping when entering the skull.

[0019] 2. The monopolar electrocoagulation needle uses alloy or conductive plastic with a hardness greater than 150hb, which improves the rigidity of the electrocoagulation needle and makes it less likely to deform. It also provides a variety of specific optional materials to meet different cost and performance requirements;

[0020] 3. The puncture diameter R1 is set to 0.8≤R1≤2mm, and the rod diameter R2 is set to 2.2mm≤R2≤2.5mm, which improves the needle body strength of the electric energy needle while meeting the puncture performance;

[0021] 4. The diameter of the puncture part is smaller than that of the rod part, which is smaller than the skull hole, and the rod part is larger than the skull hole. During use, only the puncture part enters the skull hole, which prevents the electrocoagulation needle from entering the skull too deeply and causing accidental damage to the patient.

[0022] 5. The connection between the puncture part and the rod part has a smooth transition to avoid sharp edges causing damage to the patient. In addition, as the puncture depth increases, the resistance at the smooth transition point also gradually increases. The doctor can control the puncture depth according to the resistance felt during the operation;

[0023] 6. The needle body is provided with an insulating coating except for the discharge end to avoid causing additional damage to the patient;

[0024] 7. By setting scale marks, doctors can understand the puncture depth and improve the safety of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is one of the structural schematic diagrams of the monopolar electrocoagulation needle for brain puncture provided by the utility model;

[0027] Figure 2 This is the second structural schematic diagram of the monopolar electrocoagulation needle for brain puncture provided by the utility model;

[0028] Figure 3 The utility model is a schematic diagram of the partial structure of the front end of the puncture part of the monopolar electrocoagulation needle for brain puncture provided by the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The existing electrocoagulation needles cover the conductive inner core with two or more layers of plastic coating (or sleeve) to protect against leakage. The applicant has found that the main structure of the current monopolar electrocoagulation needle body is the plastic coating (which accounts for a large proportion of the diameter in the cross section). The electrocoagulation needle mainly relies on the plastic coating to maintain the strength of the needle body. When used to break the dura mater, especially when penetrating the skull hole at a large angle, it is easy to deform and slip. For this reason, the utility model proposes a new monopolar electrocoagulation needle and electrocoagulation needle assembly for brain puncture.

[0031] Figure 1 Schematic diagram of the structure of a monopolar electrocoagulation needle for brain puncture provided by the utility model, such as Figure 1 As shown, the monopolar electrocoagulation needle includes a puncture portion 11 and a rod portion 12. The puncture portion 11 is located at the front end of the rod portion 12 (i.e., the end closer to the patient when in use). The diameter R1 of the puncture portion 11 is smaller than the diameter R2 of the rod portion 12. Both the puncture portion 12 and the rod portion 12 are made of conductive hard material.

[0032] Specifically, the puncture part and the rod part of the utility model are both made of conductive hard material. The puncture part and the rod part of the hard conductive material not only serve as conductive parts to conduct high-frequency electricity into the tissue, but also directly serve as the needle body to maintain a high needle body strength, avoiding the situation of easy slipping and deviation when entering the skull hole; and the diameter of the puncture part is smaller than the diameter of the rod part. During the puncture process, only the puncture part enters the skull hole, avoiding the electrocoagulation needle from entering the skull too deeply and causing accidental damage to the patient.

[0033] It should be noted that the monopolar electrocoagulation needle of the utility model can be an integral structure, that is, the needle body is made of an integral hard conductive material. The monopolar electrocoagulation needle can also be a split structure, for example, the front end of the conductive inner core is used as the puncture part, and the non-puncture part of the conductive inner core is sleeved with a sleeve, and the non-puncture part and the sleeve together constitute the rod described above, and the conductive inner core and the sleeve are both made of conductive hard material. Furthermore, the conductive inner core and the sleeve can also be locked in a sleeve state by means of threads, buckles, welding, etc.

[0034] Based on any embodiment, in one embodiment, the conductive hard material is an alloy or conductive plastic with a hardness greater than 150hb.

[0035] Specifically, a hardness greater than 150hb can ensure the overall strength of the electrocoagulation needle, and it is not easy to bend and deform when entering the skull hole (especially the skull hole at a large angle), avoiding slipping on the head surface, and improving the puncture efficiency. The alloy or conductive plastic needle body can ensure the conductivity of the electrocoagulation needle and output electrical energy to the discharge tip.

[0036] Based on any embodiment, in one embodiment, the alloy is selected from any one of the following: austenitic stainless steel, copper-tungsten alloy, titanium alloy, nickel-titanium alloy; the hard conductive plastic is selected from any one of the following: carbon fiber reinforced plastic, or polyaniline, polystyrene or polyimide doped with conductive fillers. Austenitic stainless steel is such as 302 stainless steel, 304 stainless steel, 316 stainless steel, preferably 304 stainless steel, which has good conductivity and hardness, and has low cost and processing difficulty.

[0037] Based on any embodiment, in one embodiment, the diameter R1 of the puncture portion 11 is in the range of 0.8≤R1≤2mm, and the diameter R2 of the rod portion 12 is in the range of 2.2mm≤R2≤2.5mm. The electrocoagulation needle in the above diameter range combined with the conductive hard material can ensure the overall strength of the electrocoagulation needle, effectively prevent the electrocoagulation needle from deforming, and avoid slipping.

[0038] Based on any embodiment, in one embodiment, the length of the puncture portion 11 is less than 60 mm, and the length of the rod portion 12 is less than 250 mm.

[0039] For example, the length of the puncture portion is set to 30 mm, 36 mm, 39 mm, 50 mm, 55 mm, etc., and the length of the rod portion is set to 150 mm, 160 mm, 180 mm, 190 mm, 200 mm, 205 mm, etc.

[0040] In this embodiment, the length of the puncture part is set to be less than 60 mm, and the length of the rod part is set to be less than 250 mm. This can improve the rigidity of the electrocoagulation needle while meeting the usage requirements, avoid deformation of the electrocoagulation needle during the process of entering the skull hole, and reduce the probability of "slipping".

[0041] Based on any embodiment, in one embodiment, the connection between the puncture portion 11 and the rod portion 12 is smoothly transitioned, so as to reduce the damage to the tissue around the wound caused by the use of the electrocoagulation needle.

[0042] Based on any embodiment, in one embodiment, the rod portion 12 is also coaxially provided with a handle.

[0043] Specifically, the electrocoagulation needle is relatively thin, and it is inconvenient for doctors to apply force (such as rotating the electrocoagulation needle) during operation. The coaxial arrangement of the handle on the rod 11 can improve the comfort of the doctor during the operation. In addition, the shape of the handle can be flexibly set, such as a cylindrical outline, a rectangular parallelepiped outline, etc.

[0044] Reference Figure 2 Based on any embodiment, in one embodiment, the rod portion 12 is composed of a first rod portion 121 and a second rod portion 122, that is, the electrocoagulation needle includes a puncture portion 11, a first rod portion 121, and a second rod portion 122 connected in sequence. During the operation, the second rod portion 122 is used to connect to the power supply module to power the monopolar electrocoagulation needle. Furthermore, a handle can be provided on the rod portion 12 to facilitate the doctor's handheld operation. The handle can be provided on the first rod portion 121 or on the second rod portion 122, as long as it does not hinder the action of the electrocoagulation needle piercing the tissue and the normal discharge of the electrocoagulation needle.

[0045] Based on any one of the embodiments, in one embodiment, a scale mark is provided on the surface of the monopolar electrocoagulation needle.

[0046] Specifically, the scale mark can be set on the surface of the electrocoagulation needle by laser engraving, silk screen printing, mechanical engraving, etc. The setting range of the scale mark can be flexibly selected, for example, the scale mark is set on all parts outside the discharge end, and the scale mark is set on the puncture part and part of the rod. The setting density of the scale mark can also be flexibly selected, for example, a scale mark is set every 10 mm, a scale mark is set every 5 mm, and a scale mark is set every 4 mm on the puncture part 11, and a scale mark is set every 8 mm on the rod 12.

[0047] Based on any embodiment, in one embodiment, the front end of the puncture portion 11 includes a discharge end, and the front end of the discharge end is conical, and the cone angle is less than 30°. Figure 3 The front end of the puncture portion 11 includes a discharge end 111. The cone angle of the discharge end 111 is less than 30°, so that the electrocoagulation needle has a certain puncture ability, which is conducive to entering the tissue (for example, penetrating the dura mater).

[0048] Based on any embodiment, in one embodiment, the surface of the monopolar electrocoagulation needle is covered with an insulating coating.

[0049] It is understandable that the electrocoagulation needle releases electrical energy through the discharge tip, and the high-frequency electricity (usually, the frequency of alternating current is higher than 200kHz) released by the discharge tip can quickly dehydrate and coagulate the tissue in contact with it, thereby achieving the purpose of cutting and stopping bleeding. In order to prevent accidental damage caused by leakage of the electrocoagulation needle, the non-working part needs to be covered with an insulating coating. Further, refer to Figure 2 , Figure 3 The portion other than the second rod portion 122 and the discharge end 111 may be covered with an insulating coating to reduce the risk of accidental damage while ensuring the power supply and discharge functions of the electrocoagulation needle.

[0050] Furthermore, when scale markings are provided on the electrocoagulation needle, the scale markings can be first engraved / printed / carved and then covered with an insulating layer. Preferably, the insulating coating has a certain degree of transparency (using a transparent material) so that the scale markings can be clearly seen.

[0051] Based on any embodiment, in one embodiment, the insulating coating is made of polytetrafluoroethylene (FEP), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (ETFE), perfluoroalkyl (PFA), nylon (PA), polyimide (PI), polyurethane (PU) or KNM1000 sprayed ceramic.

[0052] The utility model also provides an electrocoagulation needle assembly, comprising a control module, a power supply module and any of the above-mentioned monopolar electrocoagulation needles. The power supply module provides electrical energy to the monopolar electrocoagulation needle, for example, it is connected to the tail end of the rod for power supply. The control module is used to control the control state of the electrocoagulation needle, for example, to control the on and off of the discharge, adjust the output power, switch the working mode of "hemostasis" / "cutting", etc.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A monopolar electrocoagulation needle for breaking the dura mater, characterized in that: It includes a puncture part and a rod part connected to the puncture part, the diameter R1 of the puncture part is smaller than the diameter R2 of the rod part, the puncture part and the rod part are both made of conductive hard material, the conductive hard material is an alloy or conductive plastic with a hardness greater than 150hb, and the surface of the monopolar electrocoagulation needle is covered with an insulating coating.

2. The monopolar electrocoagulation needle according to claim 1, characterized in that: The alloy is selected from any one of the following: austenitic stainless steel, copper-tungsten alloy, titanium alloy, nickel-titanium alloy; The conductive plastic is selected from any one of the following: carbon fiber reinforced plastic, or polyaniline, polystyrene or polyimide doped with conductive fillers.

3. The monopolar electrocoagulation needle according to claim 1, characterized in that: The range of the diameter R1 is 0.8≤R1≤2mm, and the range of the diameter R2 is 2.2mm≤R2≤2.5mm.

4. The monopolar electrocoagulation needle according to claim 1, characterized in that: The length of the puncture portion is less than 60 mm, and the length of the rod portion is less than 250 mm.

5. The monopolar electrocoagulation needle according to claim 1, characterized in that: The connection between the puncture portion and the rod portion has a smooth transition.

6. The monopolar electrocoagulation needle according to claim 1, characterized in that: The rod portion is also coaxially provided with a handle.

7. The monopolar electrocoagulation needle according to claim 1, characterized in that: The surface of the monopolar electrocoagulation needle is provided with scale marks.

8. The monopolar electrocoagulation needle according to claim 1, characterized in that: The insulating coating is made of polyperfluoroethylene propylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl fluoride, perfluoroalkyl compound, nylon, polyimide, polyurethane or KNM1000 sprayed ceramic.

9. An electrocoagulation needle assembly, characterized in that: It comprises a control module, a power supply module and the monopolar electrocoagulation needle according to any one of claims 1 to 8.

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