Electrode instruments, surgical hand-held devices and methods of manufacturing the same

Abstract

The invention relates to an electrode instrument, a surgical hand-held device and a method for manufacturing the same, whereby the quality of the instrument can be improved. This is achieved in that the electrode instrument (16) for a surgical hand-held device has an electrical conductor (20) which is electrically insulated by a hose-like insulator (31), wherein the conductor (20) is pressed in the electrode carrier (51), wherein the electrode carrier (51) has a cross-section with six pressed sides in the pressed position.

Description

Technical Field

[0001] This invention relates to electrode instruments for surgical handheld devices, particularly for electrosurgical resection instruments. The invention also relates to surgical handheld devices, particularly electrosurgical resection instruments, and methods for manufacturing such devices. Background Technology

[0002] Surgical handheld devices, such as resectoscopes, are used to remove or treat body tissue. A typical application is in urology. Prostatectomy is mentioned as an example. The high-frequency tools used in a resectoscope can be electrodes or high-frequency (HF) electrodes connected to a high-frequency generator. The high-frequency current causes plasma to form on the electrodes. Because the plasma interacts with the tissue, HF electrodes are particularly suitable for precise, targeted tissue treatment.

[0003] The electrodes are detachably locked to the working unit or working piece of the electroresection scope via an electrode carrier. The electrodes and electrode carrier together constitute what is known as an electrode instrument. During the treatment of body tissue, the electrode instrument with electrodes is moved longitudinally along the electroresection scope.

[0004] Known electrode devices, together with optical units that can be designed as light guides or rod-lens systems, are guided and moved within the tubular axis (especially the inner axis) of an electroresection endoscope. This axis extends from the proximal to the distal end of the endoscope and, if necessary, is guided into the body to be treated along with the outer axis. In this case, the optical unit is used to observe the body area while the electrode device is being used for treatment.

[0005] Electrode devices generally consist of an electrode carrier with an electrode fixed at its distal end. Within the electrode carrier, an electrical conductor is guided from the proximal end to the electrode to enable the supply of current required by the electrode. The conductor is electrically insulated from the surrounding hollow electrode tube by an insulator. Here, compression or bending—that is, alteration or reduction of the cross-section—is applied at one or more locations within the electrode carrier region to mechanically hold and secure the components of the electrode carrier together.

[0006] It has been shown that various tools are required to perform multiple compressions on the electrode carrier, and the precise location of these compressions must be ensured or checked under this fixation principle to avoid short circuits. Short circuits can also occur if sharp burrs or edges are accidentally generated during compression. This should be avoided, as both short circuits and the presence of sharp edges or burrs can threaten the patient being treated. Furthermore, the possibility of short circuits adversely affects the required reliability of electrode instruments or surgical handheld devices.

[0007] Another drawback of the known system is that the electrode carrier components are only mechanically stabilized through common extrusion. However, a moisture- and liquid-proof seal is also required inside the electrode carrier. Moisture or liquids (e.g., irrigation fluids) entering during medical treatment can cause electrical short circuits or creepage currents, potentially threatening the patient and affecting the reliability of the treatment. Furthermore, the ingress of moisture and liquids makes cleaning and sterilization of the electrode carrier, as required for medical applications, difficult. This moisture- and liquid-proof seal inside the electrode carrier is achieved through an additional step in the manufacturing process, during which a sealant, such as silicone, is applied.

[0008] Furthermore, multiple processes are required to set up the production equipment so that all components are precisely positioned, extruded, and sealed. Another step in the production process is to inspect the quality of the extrusion and sealing. Quality inspection should ensure that all extruded components are well-extruded together, well-sealed, and fully functional. The additional processes required for sealing and quality inspection complicate the production process, increase workload and time consumption, and consequently, incur high costs. Summary of the Invention

[0009] The present invention is based on the objective of providing an electrode device, a surgical handheld device (especially an electrosurgical resectoscope), and a method of manufacturing thereof, thereby eliminating the above-mentioned problems.

[0010] The solution to the above task is described by referring to the electrode apparatus of the first aspect.

[0011] Therefore, it is specified that an electrode device for a surgical handheld device (especially an electrosurgical endoscope) has at least one tubular electrode carrier with an electrode fixed at its distal end, wherein an electrical conductor is guided from the proximal end of the electrode carrier to the electrode in the electrode carrier, and the electrical conductor is electrically insulated from the hollow electrode tube by a flexible insulator, wherein the electrical conductor is compressed at at least one location in the electrode carrier (especially in the hollow electrode tube), wherein the electrode carrier (especially the hollow electrode tube) has a cross-section with six compressed sides at the compressed location.

[0012] The cross-sectional shape of the electrode carrier (especially the hollow electrode tube) allows for the application of high pressure to all components within the electrode carrier. This mechanically and securely holds the components together. Simultaneously, the cross-sectional shape ensures the interior of the electrode carrier is sealed and protected against moisture and liquids. Additional sealing with sealant is unnecessary. Furthermore, the applied pressure is not high enough to cause accidental deformation of the electrode carrier components or adversely affect the function of the electrode carrier or its components.

[0013] Furthermore, this cross-sectional shape prevents the formation of sharp burrs or edges on the outer and / or inner surfaces of the electrode carrier (especially the hollow electrode tube). This prevents the risk of user injury, damage to user gloves, and / or short circuits. In particular, the invention can specify that the corners of this cross-section are rounded.

[0014] The present invention preferably specifies that the six sides are of equal length and / or that there are arcuate segments or rounded or acute angles of the unextruded hollow electrode tube between the extruded sides, such that the cross-section is designed as a hexagonal cross-section. The present invention can particularly specify that the tubular insulator has six sides or a hexagonal cross-section at the extrusion location. This advantageously helps to mechanically and securely hold the components of the electrode carrier together, while simultaneously sealing the interior of the electrode carrier against moisture and liquid. Extrusion, in particular, transforms the outer surface of the tubular insulator into a hexagonal shape. The inner surface of the tubular insulator retains its circular cross-section. Furthermore, the present invention can specify that the at least one extrusion location is located at the distal end of the electrode carrier.

[0015] The invention can particularly specify that the electrode carrier or each hollow electrode tube has 1 to 5 compression positions along its entire length, preferably 1 to 3 compression positions, and particularly preferably 1 to 2 compression positions, wherein each hollow electrode tube (18, 42) has the same or different number of compression positions. The presence of multiple compression positions results in additional mechanical stabilization of the electrode carrier and additional sealing against moisture and liquid. Preferably, each hollow electrode tube has 3 compression positions in the middle portion, which are used to transmit mechanical tension. It is also conceivable that the compression is arranged at the distal end of the hollow electrode tube. The compression serves as a seal and prevents water or salt water from flowing in there. In addition, another compression can be provided at the proximal end of at least one hollow electrode tube, especially on the active side. At least one compression at the distal end serves to seal and / or fix the contacts.

[0016] It is also conceivable that the ratio of the outer distance between the opposing corners of the hollow electrode tube to the outer distance between the sides of the hollow electrode tube is 1:0.8 to 1:0.95, preferably 1:0.85 to 1:0.9, and especially 1:0.866. The ratio of 0.866 is the theoretical value for a perfect equilateral hexagon. In reality, this ratio is often slightly larger because the corners are slightly rounded, so the outer distance is smaller than theoretically possible.

[0017] In particular, the present invention can specify that the ratio of the inner spacing of the opposing corners of the electrode hollow tube that is extruded into a hexagonal cross-section to the outer spacing of the opposing corners of the extruded insulator is 1:0.9 to 1:1, preferably 1:0.99 to 1:0.999.

[0018] The present invention may further specify that the ratio of the inner diameter of the insulator to the diameter of the electrical conductor at the extrusion position is 1:0.9 to 1:1, preferably 1:0.99 to 1:0.999, and / or the ratio of the outer diameter of the electrode hollow tube to the outer distance between the opposing angles of the electrode hollow tube extruded into a hexagonal cross-section is 1:0.9 to 1:1, preferably 1:0.99 to 1:0.999. The inner surface of the insulator also maintains its circular cross-section after extrusion. The specification of the inner diameter of the insulator is related to this inner circular cross-section.

[0019] The relative proportions of the electrode carrier component dimensions within the specified range result in a particularly precise fit between the components. This advantageously contributes to a mechanically secure holding of the electrode carrier components together while simultaneously providing a moisture- and liquid-proof seal inside the electrode carrier.

[0020] The present invention may further specify that the inner distance between the opposing angles of the electrode hollow tubes extruded into a hexagonal cross-section is 0.08 mm to 2.8 mm, preferably 0.3 mm to 1.8 mm, and particularly preferably 0.8 mm to 1.3 mm. The present invention may further specify that the outer distance between the opposing angles of the insulators extruded into a hexagonal cross-section is 0.08 mm to 2.8 mm, preferably 0.3 mm to 1.8 mm, and particularly preferably 0.8 mm to 1.3 mm.

[0021] The present invention may further specify that the diameter of the electrical conductor at the extrusion position is 0.05 mm to 1.5 mm, preferably 0.2 mm to 1.0 mm, and particularly preferably 0.3 mm to 0.7 mm. The present invention may further specify that the inner diameter of the insulator at the extrusion position is 0.05 mm to 1.5 mm, preferably 0.2 mm to 1.0 mm, and particularly preferably 0.3 mm to 0.7 mm.

[0022] The present invention preferably specifies that the minimum thickness of the insulator at the extrusion location is 0.02 mm to 0.7 mm, more preferably 0.1 mm to 0.5 mm, and particularly preferably 0.2 mm to 0.4 mm. The thickness of the insulator at the extrusion location is measured as the shortest distance between one corner of the insulator, which is extruded into a hexagonal cross-section, and its inner circular cross-section. The thickness of the insulator should not be less than the stated range to ensure adequate electrical insulation of the conductor and to prevent creepage current and electrical short circuits.

[0023] The invention also conceives of having an outer distance of 0.1 mm to 3.0 mm between opposing angles of the electrode hollow tubes that are extruded into a hexagonal cross-section, preferably 0.5 mm to 2.0 mm, and particularly preferably 1.0 mm to 1.5 mm.

[0024] The present invention also conceives of a wall thickness of 0.01 mm to 0.6 mm at the extrusion position of the electrode hollow tube, preferably 0.05 mm to 0.4 mm, and particularly preferably 0.1 mm to 0.3 mm.

[0025] The present invention may also specify that the inner distance between the opposing walls of the hollow electrode tube at the extrusion position is 0.08 mm to 2.5 mm, preferably 0.4 mm to 1.7 mm, and particularly preferably 0.8 mm to 1.3 mm.

[0026] It is also conceivable that the length of one particular extrusion at the extrusion location is 2mm to 20mm, preferably 3mm to 11mm. It is also conceivable that the distance between two extrusion locations, especially between two extrusion locations, is 2mm to 10mm, preferably 5mm.

[0027] The size of the electrode carrier components within this range offers the advantage of precise relative positioning. This helps to mechanically and securely hold the electrode carrier components together while simultaneously sealing the interior of the electrode carrier against moisture and liquid. Furthermore, components of this size result in an electrode carrier well-suited for insertion into surgical handheld devices (especially electrosurgical endoscopes) where it can fully function.

[0028] To ensure that the components of the electrode carrier are mechanically and securely held together at the extrusion location and sealed against moisture and liquids, it is also important that the size and relative dimensions of the components are within a suitable order of magnitude before extrusion or in the unextruded area or unextruded location. Preferably, the electrode carrier and all its components have a circular cross-section before extrusion or in the unextruded area.

[0029] Therefore, it can be specified that the ratio of the inner diameter of the hollow electrode tube to the outer diameter of the insulator at the uncompressed position is 1:0.8 to 1:0.99, preferably 1:0.9 to 1:0.99. In particular, the inner diameter of the hollow electrode tube and the outer diameter of the insulator are dimensionally designed such that the insulator can still be pulled through the tube.

[0030] It can also be specified that the ratio of the inner diameter of the insulator to the diameter of the conductor in the uncompressed position is 1:0.8 to 1:0.99, preferably 1:0.9 to 1:0.99. In particular, the inner diameter of the insulator and the diameter of the conductor are sized such that the insulator can also be pulled and fitted onto the conductor.

[0031] It can also be specified that the inner diameter of the hollow electrode tube at the unextruded position is within the same range as the inner distance between the opposing angles of the hollow electrode tube extruded into a hexagonal cross-section. The outer diameter of the insulator at the unextruded position can be within the same order of magnitude as the outer distance between the opposing angles of the insulator extruded into a hexagonal cross-section. The inner diameter of the insulator at the unextruded position can be within the same order of magnitude as the inner diameter of the insulator at the extruded position.

[0032] The diameter of the conductor in the uncompressed position can be on the same order of magnitude as the diameter in the compressed position. The thickness of the insulator decreases during compression. Through this compression, the volume between the unchanged conductor and the reduced outer tube decreases. Since the insulating hose is already almost completely filled in this volume in the uncompressed state, the hose is compressed. This ensures that the gaps between the conductor and the hose, as well as the gaps between the hose and the outer tube, are closed. Through a combination of plastic deformation of the outer tube and elastic deformation of the hose, the hose retains a sustained radial pressure on the outer tube and the conductor. This clamping force between the components serves both to maintain high friction for axial tensile force and to achieve higher sealing performance. The outer diameter of the electrode hollow tube in the uncompressed position can be on the same order of magnitude as the outer distance between the opposing angles of the electrode hollow tube compressed into a hexagonal cross-section. The wall thickness of the electrode hollow tube in the uncompressed position can be on the same order of magnitude as the wall thickness of the electrode hollow tube in the compressed position. Here, the size of a component in a compressed position can be smaller than the size of the corresponding component in the uncompressed position or before compression.

[0033] It can also be specified that the electrode device according to the present invention includes one or two electrode carriers, preferably two electrode carriers.

[0034] Preferably, the electrode is a high-frequency (HF) electrode. The electrode, especially the HF electrode, can be designed as a cut ring or button electrode depending on the application, but it can also be designed as a needle, roller, belt, etc.

[0035] This invention can specify that the hollow electrode tube is made of a metallic material, preferably stainless steel. It can also specify that the insulator is made of a non-conductive material, preferably Teflon. Furthermore, it can specify that the electrical conductor is made of a metallic material, preferably stainless steel or copper.

[0036] Another solution to the task described in the preamble is described based on the surgical handheld device (especially the electrosurgical resectoscope) of the second aspect.

[0037] This surgical handheld device (especially an electrosurgical resectoscope) has an electrode device according to the first aspect. Here, the electrode device comprises at least one tubular electrode carrier with an electrode fixed at its distal end. An electrical conductor is guided from the proximal end of the electrode carrier to the electrode within the electrode carrier. This conductor is electrically insulated relative to the hollow electrode tube by a flexible insulator. The conductor is compressed at at least one location within the electrode carrier (especially the hollow electrode tube), and the electrode carrier (especially the hollow electrode tube) has a cross-section with six compressed sides at the compressed location. The surgical handheld device (especially an electrosurgical resectoscope) according to the invention preferably has an electrode device that also possesses one or more of the features of the electrode device according to the invention described above. Therefore, the surgical handheld device (especially an electrosurgical resectoscope) according to the invention also possesses the same advantageous performance as the electrode device according to the invention described above.

[0038] To address the aforementioned issues, a method for manufacturing a surgical handheld device (especially an electrosurgical resectoscope) according to a third aspect is described. The third aspect relates to a method for manufacturing a surgical handheld device (especially an electrosurgical resectoscope) having an electrode device having at least one tubular electrode carrier with an electrode fixed at its distal end. An electrical conductor is guided from the proximal end of the electrode carrier to the electrode within the electrode carrier, and the conductor is electrically insulated relative to the hollow electrode tube by a flexible insulator. The conductor is compressed at at least one location within the electrode carrier (especially the hollow electrode tube), where the electrode carrier (especially the hollow electrode tube) has a cross-section with six compressed sides at that location. Preferably, the surgical handheld device (especially the electrosurgical resectoscope) also possesses one or more of the features of the electrode device according to the invention described above.

[0039] The method according to the present invention preferably includes the following steps:

[0040] a) Provide at least one electrode carrier;

[0041] a1) Cover the conductor with an insulating hose;

[0042] a2) Insert the conductor along with the insulating hose into the hollow tube;

[0043] b) Provide an extrusion device;

[0044] c) bringing the extrusion device into contact with a position on the electrode carrier; and

[0045] d) The electrical conductor is pressed in the electrode carrier (especially the hollow electrode tube) at the said position by means of the extrusion device, wherein the electrode carrier (especially the hollow electrode tube) has a hexagonal cross-section.

[0046] Within an electrode carrier (especially a hollow electrode tube and / or a flexible tubular insulator), an electrical conductor is extruded into a cross-section with six extruded sides, applying high pressure to all components within the electrode carrier. This results in the components of the electrode carrier being mechanically and firmly held together and secured to each other. Simultaneously, the extrusion into this cross-sectional shape advantageously ensures a moisture- and liquid-resistant seal, protecting the interior of the electrode carrier. In this configuration, the applied pressure is not so high as to cause accidental deformation of the electrode carrier components or adversely affect the function of the electrode carrier or its components.

[0047] Because of the extrusion, no additional sealing with a sealant is required. Thus, extruding into the cross-sectional shape allows for mechanical retention or securing of the electrode carrier component for the surgical handheld device while simultaneously providing insulation against moisture or liquid intrusion. Therefore, only one process is required according to the method of the invention, whereas conventional manufacturing methods require at least two separate processes. The multiple steps required for quality inspection are also significantly reduced due to the method of the invention. The manufacturing method according to the invention is thus significantly simplified; multiple processes are saved. Therefore, the manufacturing method according to the invention is also faster and more cost-effective compared to conventional methods, which is advantageous.

[0048] Furthermore, the extrusion into this cross-sectional shape preferably results in no sharp burrs or edges being generated on the outer surface of the electrode carrier (especially the hollow electrode tube). This avoids short circuits. Another advantage of arranging the extruded cross-section within the envelope of the unextruded cross-section is that it ensures continuous guidance and that no sections that interfere with guidance extend beyond the diameter of the hollow tube.

[0049] According to the method of the invention, the extrusion device can be a manual extrusion tool or an automatic extrusion device. Preferably, it can be a pressing device, especially an automatic one, for producing multiple extrusions in a single process. In particular, it can be specified as a pressing device (preferably a press), a punch head, or pliers (clamps) for producing crimps, especially preferably pliers whose jaws have hexagonal recesses. Attached Figure Description

[0050] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings, wherein:

[0051] Figure 1 A schematic diagram of an electrosurgical resection microscope is shown.

[0052] Figure 2 A three-dimensional view of the distal end of the electrode device is shown.

[0053] Figure 3 A schematic cross-sectional view of the electrode carrier is shown at the uncompressed location or before compression.

[0054] Figure 4aA schematic cross-sectional view of the electrode carrier at the extrusion location is shown, and

[0055] Figure 4b It shows that according to Figure 4a A schematic diagram of the cross-section of the electrode carrier.

[0056] List of reference numerals

[0057] 10 Electrosurgical resection mirror

[0058] 11 Working Units

[0059] 12 Handle Units

[0060] 13 axes

[0061] 14. Outer shaft

[0062] 15 Inner tube

[0063] 16 Electrode Instruments

[0064] 17. Eyepiece

[0065] 18 Hollow Electrode Tubes

[0066] 20 Electrical conductors

[0067] 21. Remote

[0068] 30 Cross-section

[0069] 31 Insulators

[0070] 32 diameter

[0071] 40 Hexagonal cross section

[0072] 41 Insulators

[0073] 42 Hollow Electrode Tube

[0074] 43 Outer spacing

[0075] 44 Inner Spacing

[0076] 45 Outer spacing

[0077] 46. ​​Thickness of the insulator

[0078] 47 Outer spacing

[0079] 48. Inner diameter of the insulator

[0080] 51 Electrode Carrier

[0081] 52 Extrusion Position

[0082] 53 Electrode

[0083] 54 Side View

[0084] 55 cents Detailed Implementation

[0085] exist Figure 1 In the illustration, an electrosurgical resectoscope 10 is shown as an example of a handheld surgical device. The electrosurgical resectoscope 10 essentially consists of a working unit 11, a handle unit 12, and a tubular shaft 13. In the embodiment of the handheld surgical device or electrosurgical resectoscope 10 shown here, the tubular shaft 13 comprises an outer shaft 14, an inner tube 15 housing an optical unit, and electrode instruments 16. An eyepiece 17 is provided proximally for the user to observe the area to be treated medically in front of the distal end 21 of the handheld device through the optical unit.

[0086] The electrode apparatus 16 extends along the inner tube 15 from the distal end 21 of the electrosurgical unit 10 to the proximal end working unit 11. A local area of ​​the electrode apparatus 16 has electrode hollow tubes 18 and 42. Figure 2 The electrode device 16 shown is only one possible embodiment. It should be clearly pointed out that the invention described herein should not be limited to the form described herein. Rather, it is conceivable that the invention can also be used in connection with electrode devices formed in other forms.

[0087] Figure 2 The distal end 21 of the electrode device 16 is shown. It has an electrode 53. This electrode 53, or cutting ring electrode, is capable of receiving electrical energy via a high-frequency generator (not shown), which is used to treat tissue. By applying a high-frequency voltage to the electrode 53, plasma is formed around the electrode 53. By axially reciprocating movement of the electrode device 16, the patient's tissue can be treated or cut.

[0088] In addition to the mechanical connection, the electrode carrier 51, comprising two hollow electrode tubes 18, 42 and an electrical conductor 20, is also used for electrical contact with the electrode 53. It can be specified that not only the electrode carrier 51 or the hollow electrode tubes 18, 42, but also the electrical conductor 20 within the electrode carrier 51 serves as an electrical conductor or contact point. Here, the electrical conductor 20 extends longitudinally through the hollow electrode tubes 18, 42.

[0089] Electrode 53 according to, for example Figure 2 The illustrated embodiment has its ends mechanically fixed or capable of being fixed to two electrode carriers 51 or two hollow electrode tubes 18, 42. The electrode 53, together with the electrode carrier 51, is a major component of the electrode apparatus 16. Compression is applied at these locations 52, whereby the electrode carrier 51 has a hexagonal cross-section 40 according to the invention. In addition to the parallel guidance of the electrode carriers 51 or hollow electrode tubes 18, 42 shown herein, it is conceivable that the electrode carrier 51 is designed in a forked shape and converges towards a single axis towards its proximal end. The electrode 53 is shown here as a cutting ring. Other electrode shapes are also conceivable.

[0090] Figure 3 A schematic diagram of the cross-section 30 of the electrode carrier 51 is shown in a position where the electrode carrier 51 is not compressed, or in an uncompressed position or before compression. In the uncompressed position or before compression, the electrode carrier 51, the hollow electrode tubes 18 and 42, the flexible tubular insulator 31, and the electrical conductor 20 have a circular cross-section. The electrical conductor 20 has a diameter 32.

[0091] exist Figure 4a and Figure 4b The cross-section 40 of the electrode carrier 51 is also shown, but here it is in the position where the electrode carrier 51 has been compressed according to the invention. Through compression according to the invention, the electrode carrier 51 also obtains a hexagonal cross-section 40 in this position according to the invention. Through compression, the hollow electrode tubes 18, 42 thus obtain six sides 54. The sides 54 can be designed to be of equal or different lengths and / or arranged in pairs parallel to each other. Each pair of sides 54 forms an angle 55, which can be an arc segment of the hollow electrode tubes 18, 42 or designed to be circular or angular. After compression, the outer surfaces of the hollow electrode tubes 18, 42 and the flexible insulator 41 now have a hexagonal cross-section 40. The inner surfaces of the electrical conductor 20 and the flexible insulator 41 retain their circular cross-sections.

[0092] Figure 4b A series of dimensions for the electrode carrier 51, which is extruded into a hexagonal cross-section 40, are defined and are significant for its advantageous performance. The outer spacing 43 of the opposing corners 55 of the extruded hexagonal cross-section electrode hollow tubes 18, 42 is measured between the opposing sides 54 of the opposing corners 55. The inner spacing 44 of the opposing corners 55 of the extruded hexagonal cross-section electrode hollow tubes 18, 42 is measured between the inner sides of the opposing corners 55. The outer spacing 45 of the opposing walls of the electrode hollow tubes 18, 42 at the extrusion position is determined between the outer surfaces of the opposing walls. The minimum thickness 46 of the insulator 41 at the extrusion position is measured as the shortest distance between a side 54 and the inner circular cross-section of the insulator 41. The specification of the inner diameter 48 of the insulator 41 at the extrusion position is related to the inner circular cross-section. The outer spacing 47 of the opposite angles of the insulator 41, which is compressed into a hexagonal cross section, is determined between the opposite angles.

Claims

1. An electrode instrument (16) for a surgical hand-held device, the electrode instrument (16) having at least one tubular electrode carrier (51) with an electrode (53) fixed at a distal end (21) of the electrode carrier (51), wherein, An electrical conductor (20) is guided from the proximal end of the electrode carrier (51) to the electrode (53) within the electrode carrier (51), and the electrical conductor (20) is electrically insulated from the hollow electrode tube (18, 42) by a flexible insulator (31, 41), wherein the electrical conductor is compressed within the electrode carrier (51) at at least one compression position (52), characterized in that the electrode carrier (51) has a cross-section with six compression sides (54) at the compression position (52), such that the cross-section is hexagonal. (40) The flexible insulator (31, 41) is compressed by elastic deformation, such that the gap between the flexible insulator (31, 41) and the electrical conductor (20) and the gap between the flexible insulator (31, 41) and the electrode hollow tube (18, 42) are closed by means of the radially persistent pressure of the flexible insulator (31, 41) on the electrical conductor (20) and the electrode hollow tube (18, 42), thereby achieving high friction capable of withstanding axial tensile forces and higher sealing performance against humidity and liquids.

2. The electrode instrument (16) according to claim 1, characterized in that The six sides (54) are of equal length and / or the arc segments of the uncompressed electrode hollow tubes (18, 42) or the rounded corners or sharp corners (55) of the uncompressed electrode hollow tubes (18, 42) are located between the compressed sides (54).

3. The electrode instrument (16) according to claim 1 or 2, characterized in that The electrode carrier (51) or each electrode hollow tube (18, 42) has 1 to 5 compression positions (52) along its entire length, wherein each electrode hollow tube (18, 42) has the same number or different number of compression positions.

4. The electrode device (16) according to claim 1, characterized in that, The ratio between the outer distance of the opposite corner (55) of the hollow electrode tube (18, 42) and the outer distance of the side surface (54) of the hollow electrode tube (18, 42) is 1:0.8 to 1:0.

95.

5. The electrode device (16) according to claim 1, characterized in that, The ratio of the inner spacing (44) of the opposing angles (55) of the electrode hollow tubes (18, 42) that are extruded into a hexagonal cross section (40) to the outer spacing of the opposing angles of the extruded insulator (41) is 1:0.9 to 1:

1.

6. The electrode device (16) according to claim 1, characterized in that, The ratio of the inner diameter (48) of the insulator (41) to the diameter (32) of the electrical conductor (20) at the compression position (52) is 1:0.9 to 1:

1.

7. The electrode device (16) according to claim 1, characterized in that, The ratio of the outer diameter of the electrode hollow tube (18, 42) to the outer distance of the opposite angle (55) of the electrode hollow tube (18, 42) which is extruded into a hexagonal cross section (40) is 1:0.9 to 1:

1.

8. The electrode device (16) according to claim 1, characterized in that, The thickness (46) of the insulator (41) at the extrusion position (52) is 0.02 mm to 0.7 mm.

9. The electrode device (16) according to claim 1, characterized in that, The outer distance between the opposite corners of the electrode hollow tubes (18, 42) that are extruded into a hexagonal cross section (40) is 0.1 mm to 3.0 mm.

10. The electrode device (16) according to claim 1, characterized in that, The diameter (32) of the electrical conductor (20) at the extrusion position (52) is 0.05 mm to 1.5 mm.

11. The electrode device (16) according to claim 1, characterized in that, The outer distance between the opposing walls of the hollow electrode tube at the extrusion position (52) is 0.08 mm to 2.5 mm.

12. The electrode device (16) according to claim 1, characterized in that, The length of the extrusion position (52) is 2 mm to 20 mm.

13. The electrode device (16) according to claim 1, characterized in that, The distance between the two extrusion positions (52) is 2 mm to 10 mm.

14. The electrode device (16) according to claim 1, characterized in that, At least one compression position (52) is located at the distal end (21) of the electrode carrier (51).

15. The electrode device (16) according to claim 1, characterized in that, The electrode device (16) is configured for use with an electrosurgical resection mirror (10).

16. The electrode device (16) according to claim 1, characterized in that, The electrical conductor is compressed at at least one compression position (52) inside the hollow electrode tube (18, 42).

17. The electrode device (16) according to claim 1, characterized in that, The hollow electrode tube (18, 42) has a cross-section with six extruded sides (54) at the extrusion position (52).

18. The electrode device (16) according to claim 3, characterized in that, The electrode carrier (51) or each electrode hollow tube (18, 42) has 2 to 4 compression positions (52) along its entire length.

19. The electrode device (16) according to claim 4, characterized in that, The ratio between the outer distance of the opposite corner (55) of the hollow electrode tube (18, 42) and the outer distance of the side surface (54) of the hollow electrode tube (18, 42) is 1:0.85 to 1:0.

9.

20. The electrode device (16) according to claim 4, characterized in that, The ratio between the outer distance of the opposite corner (55) of the hollow electrode tube (18, 42) and the outer distance of the side surface (54) of the hollow electrode tube (18, 42) is 1:0.

866.

21. The electrode device (16) according to claim 5, characterized in that, The ratio of the inner spacing (44) of the opposing angles (55) of the electrode hollow tubes (18, 42) that are extruded into a hexagonal cross section (40) to the outer spacing of the opposing angles of the extruded insulator (41) is 1:0.99 to 1:0.

999.

22. The electrode device (16) according to claim 6, characterized in that, The ratio of the inner diameter (48) of the insulator (41) to the diameter (32) of the electrical conductor (20) at the compression position (52) is 1:0.99 to 1:0.

999.

23. The electrode device (16) according to claim 7, characterized in that, The ratio of the outer diameter of the electrode hollow tube (18, 42) to the outer distance of the opposite angle (55) of the electrode hollow tube (18, 42) which is extruded into a hexagonal cross section (40) is 1:0.99 to 1:0.

999.

24. The electrode device (16) according to claim 8, characterized in that, The thickness (46) of the insulator (41) at the compression position (52) is 0.1 mm to 0.5 mm.

25. The electrode device (16) according to claim 8, characterized in that, The thickness (46) of the insulator (41) at the compression position (52) is 0.2 mm to 0.4 mm.

26. The electrode device (16) according to claim 9, characterized in that, The outer distance between the opposing corners of the hollow electrode tubes (18, 42) that are extruded into a hexagonal cross section (40) is 0.5 mm to 2.0 mm.

27. The electrode device (16) according to claim 9, characterized in that, The outer distance between the opposite corners of the hollow electrode tubes (18, 42) that are extruded into a hexagonal cross section (40) is 1.0 mm to 1.5 mm.

28. The electrode device (16) according to claim 10, characterized in that, The diameter (32) of the electrical conductor (20) at the extrusion position (52) is 0.2 mm to 1.0 mm.

29. The electrode device (16) according to claim 10, characterized in that, The diameter (32) of the electrical conductor (20) at the extrusion position (52) is 0.3 mm to 0.7 mm.

30. The electrode device (16) according to claim 11, characterized in that, The outer distance between the opposing walls of the hollow electrode tube at the extrusion position (52) is 0.4 mm to 1.7 mm.

31. The electrode device (16) according to claim 11, characterized in that, The outer distance between the opposing walls of the hollow electrode tube at the extrusion position (52) is 0.8 mm to 1.3 mm.

32. The electrode device (16) according to claim 12, characterized in that, The length of the extrusion position (52) is 3 mm to 11 mm.

33. The electrode device (16) according to claim 12, characterized in that, The length of one extrusion is 2mm to 20mm.

34. The electrode device (16) according to claim 12, characterized in that, The length of one extrusion is 3mm to 11mm.

35. The electrode device (16) according to claim 13, characterized in that, The distance between the two extrusion positions (52) is 5 mm.

36. The electrode device (16) according to claim 13, characterized in that, The gap between the two compressions is 2mm to 10mm.

37. The electrode device (16) according to claim 13, characterized in that, The gap between the two extrusions is 5mm.

38. A surgical handheld device comprising an electrode device (16) according to any one of claims 1 to 37, the electrode device (16) having at least one tubular electrode carrier (51), wherein an electrode (53) is fixed at a distal end (21) of the electrode carrier (51), wherein, An electrical conductor (20) is guided from the proximal end of the electrode carrier (51) to the electrode (53) within the electrode carrier (51), and the electrical conductor (20) is electrically insulated from at least one electrode hollow tube (18, 42) by a tubular insulator (31, 41), wherein the electrical conductor (20) is compressed at at least one compression position (52) within the electrode carrier (51), wherein the electrode carrier (51) has a cross-section with six compressed sides (54) at the compression position (52).

39. The surgical handheld device according to claim 38, characterized in that, The surgical handheld device is an electrosurgical resection device (10).

40. The surgical handheld device according to claim 38, characterized in that, The electrical conductor (20) is compressed at at least one compression position (52) within the hollow electrode tube (18, 42).

41. The surgical handheld device according to claim 38, characterized in that, in, The hollow electrode tube has a cross-section with six extruded sides (54) at the extrusion position (52).

42. A method for manufacturing a surgical handheld device, the surgical handheld device having an electrode device (16) according to any one of claims 1 to 37, the electrode device (16) having at least one tubular electrode carrier (51), wherein an electrode (53) is fixed at a distal end (21) of the electrode carrier (51), wherein, An electrical conductor (20) is guided from the proximal end of the electrode carrier (51) to the electrode (53) within the electrode carrier (51), and the electrical conductor (20) is electrically insulated from the hollow electrode tube (18, 42) by a flexible insulator (31, 41). The electrical conductor (20) is characterized in that the electrical conductor (20) is compressed within the electrode carrier (51) at at least one compression position (52), wherein the electrode carrier (51) has a cross-section with six compression sides (54) at the compression position (52).

43. The method for manufacturing a surgical handheld device according to claim 42, characterized in that, The method includes the following steps: a) Provide at least one of the electrode carriers (51); a1) Cover the electrical conductor with the tubular insulator; a2) Insert the electrical conductor along with the flexible insulator into the hollow electrode tube; b) Provide an extrusion device; c) Contacting the extrusion device with an extrusion position (52) of the electrode carrier (51); and d) The electrical conductor is squeezed in the electrode carrier (51) at the squeeze position (52) by means of the squeeze device, wherein the electrode carrier (51) has a cross-section with six squeezed sides (54).

44. The method according to claim 42, characterized in that, The surgical handheld device is an electrosurgical resection device (10).

45. The method according to claim 42, characterized in that, The electrical conductor (20) is compressed at at least one compression position (52) inside the electrode hollow tube (18, 42).

46. ​​The method according to claim 42, characterized in that, At least one electrode hollow tube (18, 42) has a cross-section with six extruded sides (54) at the extrusion position (52).

47. The method according to claim 43, characterized in that, The method includes the following steps: d) pressing the electrical conductor at the pressing position (52) in the hollow electrode tube (18, 42) by means of the pressing device.

48. The method according to claim 43, characterized in that, in, The hollow electrode tube has a cross-section with six extruded sides (54).

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