An electropolishing device for medical guide wires

Abstract

This application provides an electrolytic polishing device for medical guidewires, including an electrolytic cell, an upper clamp, and a top cover. The electrolytic cell is a cylindrical structure with grooves, and its bottom has multiple concentric annular grooves. The upper clamp is annular, with an annular groove inside. A cylinder with a through hole is located at the center of the ring, with the center of the cylinder coinciding with the center of the ring, and the center of the through hole inside the cylinder coinciding with the center of the ring. The top cover has a cylindrical structure with a through hole at its center, with the center of the cylinder coinciding with the center of the top cover, and the center of the through hole inside the cylinder coinciding with the center of the top cover. This application ensures coaxiality while allowing for convenient, rapid, and safe installation of the metal cathode and metal anode. Furthermore, the device is located at the bottom of the electrolytic cell, reducing electrolyte consumption and effectively controlling costs and improving production efficiency. The multiple concentric annular grooves at the bottom of the electrolytic cell allow for selection of different inner diameters of the device depending on the desired polishing degree.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electrolytic polishing, in particular to an electrolytic polishing device for a medical guide wire. BACKGROUND

[0002] Cardiovascular diseases have become one of the diseases with the highest mortality rate in the world, and stent intervention surgery is the main means of treatment. The medical guide wire is a necessary component in the operation process, which needs to be placed first at the human body artery during the operation as a guide for the stent and other instruments to enter the lesion area.

[0003] The medical guide wire is generally composed of nickel-titanium alloy or stainless steel, with a diameter of 0.05-0.35 mm, and a large change in the diameter of the front end and a small diameter area. The guide wire is polished by a traditional grinding machine, and there are problems such as low precision, poor coaxiality and even guide wire fracture. The electrolytic polishing can accurately polish the machining area and keep the non-machining area, thereby ensuring the diameter precision of the guide wire. Before electrolytic polishing, the guide wire needs to be clamped and fixed. At present, the polishing equipment for small-diameter guide wires and other slender wires has a complex structure, high cost and is relatively rare.

[0004] The above information disclosed in the background of the application is only used to increase the understanding of the background of the application, and therefore, it can include prior art known to those skilled in the art. SUMMARY

[0005] In view of the above problems, the purpose of the application is to provide an electrolytic polishing device for a medical guide wire, which is convenient to make, simple in structure and high in practicability.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0007] An electrolytic polishing device for a medical guide wire comprises an electrolytic cell, an upper clamp and an upper cover. The electrolytic cell is a cylindrical structure with a convex groove, specifically comprising a cylindrical main body structure and a convex portion outward along the diameter direction of the cylinder. A recess is arranged in the convex portion and communicates with the main body structure. One end of the convex groove is tangent to the inner diameter of the cylindrical main body structure, and the other end of the convex groove is away from the center of the cylindrical main body structure by a distance greater than the radius of the cylindrical main body structure. The height of the convex groove is consistent with the height of the cylinder. A plurality of concentric circular grooves are arranged at the bottom of the electrolytic cell. The upper part of the recess is flush with the upper part of the main body structure, and the lower part of the recess is flush with the upper part of the circular groove at the bottom of the electrolytic cell. A circular hole is arranged at the center of the bottom.

[0008] The upper clamp is in the shape of a circular ring, and a circular ring groove exists in the circular ring. Three columnar support members are respectively arranged at the three equal parts of the circular arc in the circular ring, and the three columnar support members intersect at the center of the circular ring. A cylindrical column with a through hole is arranged at the center of the circular ring, and the center of the cylindrical column coincides with the center of the circular ring. The height of the cylindrical column is consistent with the height of the circular ring, and the center of the through hole in the cylindrical column coincides with the center of the circular ring.

[0009] The upper cover is a flange plate structure, and an annular area is arranged outside the inner diameter of the upper cover. The height of the annular area outside the inner diameter of the upper cover to the outer diameter area of the upper cover is lower than that of the inner diameter of the upper cover. There are four columnar supports at the four equal parts of the circular arc in the upper cover, and the four columnar supports intersect at the center column of the upper cover. There is a cylindrical structure with a through hole in the center of the upper cover, and the center of the cylindrical structure coincides with the center of the upper cover. The height of the cylindrical structure is consistent with the height of the columnar support, and the center of the through hole in the cylindrical structure coincides with the center of the upper cover.

[0010] In some embodiments of the present application, a circular ring-shaped sheet metal is used as a metal cathode, which is arranged in the circular ring groove at the bottom of the electrolytic cell. The sheet metal is connected with a lead wire, and the lead wire with an insulating sheath is led out through the convex groove of the electrolytic cell to the negative electrode of the power supply, so that the lead wire outside the circular ring is not exposed to the electrolyte, and the lead wire without the insulating sheath is in full contact with the sheet metal.

[0011] In some embodiments of the present application, the upper end of the circular ring-shaped sheet metal cathode is inserted into the circular ring groove in the upper clamp, so as to ensure that the center of the upper clamp coincides with the center of the circular hole at the bottom of the electrolytic cell.

[0012] In some embodiments of the present application, the medical guide wire passing through the upper clamp passes through the through hole of the upper cover, and the diameter of the through hole is in interference fit with the diameter of the medical guide wire, so as to ensure the coaxiality of the medical guide wire. The medical guide wire passing through the upper clamp is connected with the lead wire, and the other end of the lead wire is connected with the positive electrode of the direct current power supply, so that the medical guide wire becomes a metal anode.

[0013] In some embodiments of the present application, the medical guide wire to be polished is passed through the through hole of the upper clamp, and the diameter of the through hole is in interference fit with the diameter of the medical guide wire, so as to ensure that the guide wire in the circular hole does not undergo electrolytic reaction.

[0014] In some embodiments of the present application, for the electrolytic cell, the inner diameter of the cylindrical main body structure is 40-45 mm, the wall thickness of the cylinder is 2-4 mm, the height of the cylinder is 50-80 mm, the convex groove is tangent to the cylinder, the distance from the outside of the convex groove to the center of the cylinder is 30-50 mm, the height of the convex groove is consistent with the height of the cylinder, the width of the convex groove is 10-15 mm, the wall thickness of the convex groove is 1-4 mm, there are multiple concentric circular ring grooves at the bottom of the electrolytic cell, the thickness of the bottom is 15-25 mm, a circular hole is arranged in the center of the bottom, the diameter of the circular hole is 0.04-0.4 mm, the depth of the circular hole is 1-4 mm, the inner diameters of the circular ring grooves in the bottom are 9.5 mm, 13.5 mm, 17.5 mm, 21.5 mm, 25.5 mm, 29.5 mm, 33.5 mm and 37.5 mm respectively, the outer diameters of the circular ring grooves in the bottom are increased by 0.2-1.0 mm based on the inner diameters, and the depth of the circular ring groove is 5-20 mm.

[0015] In some embodiments of the present application, for the upper clamp, the inner diameter of the ring: 7-36 mm, the outer diameter increases by 2-8 mm based on the inner diameter, the ring height is 3-8 mm; the inner diameter of the ring groove: 8-37 mm, the outer diameter of the ring groove increases by 0.2-1.0 mm based on the inner diameter of the ring groove, the depth of the ring groove is 2-7 mm; the height of the columnar support is 3-8 mm, the width of the columnar support is 1-6 mm; the diameter of the cylinder: 3-13 mm, the diameter of the through hole in the cylinder: 0.04-0.4 mm.

[0016] In some embodiments of the present application, the inner diameter of the upper cover is 34-42 mm, the outer diameter of the upper cover is 48-52 mm, the height of the annular area is 4-15 mm; the height of the annular area to the outer diameter area of the upper cover is lower than the outer annular area of the inner diameter of the upper cover, the height difference is 0.5-8 mm; the outer side of the inner diameter of the upper cover has an annular area of 1-4 mm; the height of the columnar support is 2-10 mm, the width of the columnar support is 1-4 mm; the diameter of the cylindrical structure with a through hole at the center of the upper cover is 5-15 mm, the diameter of the through hole at the center of the upper cover is 0.04-0.4 mm.

[0017] In some embodiments of the present application, the electrolytic cell is made of glass steel, plastic, acid-resistant ceramic and other materials, has a certain hardness, cannot be deformed and does not react with electrolyte, and can withstand the corresponding temperature and vibration of electrolytic polishing test.

[0018] In some embodiments of the present application, the upper clamp is made of resin, plastic, ceramic and other materials, has a certain hardness, cannot be deformed and does not react with electrolyte.

[0019] In some embodiments of the present application, the upper cover is made of glass steel, high-strength ceramic and other materials, has a certain hardness, cannot be deformed and does not react with electrolyte.

[0020] In some embodiments of the present application, a temperature sensor is placed in the electrolytic cell for detecting the temperature of the polishing liquid.

[0021] In some embodiments of the present application, the round hole at the bottom of the electrolytic cell can ensure the original size of the non-processing area.

[0022] In some embodiments of the present application, the cathode ring wire is conveniently led out through the convex groove in the electrolytic cell without affecting the coaxiality of the anode and cathode.

[0023] During the research process, the applicant discovered through extensive experiments that the diameter of the anode, the object to be polished, is very small, ranging from 0.05 to 0.35 mm. If the medical guidewire cannot be kept perpendicular to the bottom of the electrolytic cell during clamping, uneven polishing will occur during electrolysis. This means one side will be polished more heavily than the other, potentially even breaking the guidewire. Furthermore, uneven polishing affects the coaxiality of the guidewire, consequently impacting the positioning accuracy when mounting the support on the guidewire.

[0024] This application has at least the following advantages: While ensuring coaxiality, this application allows for convenient, rapid, and safe installation of metal cathodes and metal anodes. Furthermore, the device is located at the bottom of the electrolytic cell, reducing the amount of electrolyte used and effectively controlling costs and improving production efficiency. Since the bottom of the electrolytic cell is provided with multiple concentric annular grooves, it is possible to select and place the device in concentric annular grooves with different inner diameters according to the degree of polishing. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the electrolytic cell structure of the electrolytic polishing device for medical guide wires provided in this application embodiment.

[0027] Figure 2 A schematic diagram of the upper clamp structure of the medical guide wire electropolishing device provided in the embodiments of this application.

[0028] Figure 3 A schematic diagram of the upper cover structure of the medical guide wire electropolishing device provided in the embodiments of this application.

[0029] Figure 4 This is an assembly diagram of the medical guide wire electropolishing device provided in an embodiment of this application.

[0030] Among them, 1-electrolytic cell, 2-upper clamp, 3-upper cover, 4-cylindrical structure with protrusions. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] The present application will be further described below with reference to specific embodiments.

[0036] This application provides an electropolishing device for medical guidewires, including an electrolytic tank 1, an upper clamp 2, and an upper cover 3, such as... Figure 4 As shown.

[0037] The electropolishing apparatus for medical guidewires in some embodiments of this application includes an electrolytic tank 1, an upper clamp 2, and an upper cover 3. For example... Figure 1 As shown, the electrolytic cell 1 is a cylindrical structure 4 with a groove, specifically including a cylindrical main structure and a protrusion extending outward along the diameter of the cylinder. The protrusion has a groove communicating with the main structure. One end of the groove is tangent to the inner diameter of the cylindrical main structure, and the other end of the groove protrudes out of the cylindrical main structure. The height of the groove is the same as the height of the cylinder. The bottom of the electrolytic cell 1 has multiple concentric annular grooves. The upper part of the groove is flush with the main structure, and the lower part is flush with the upper part of the annular groove at the bottom of the electrolytic cell 1. A circular hole is opened at the center of the bottom.

[0038] Since the bottom of the electrolytic cell 1 is provided with multiple concentric annular grooves, it is possible to select concentric annular grooves with different inner diameters to place the product according to the degree of polishing.

[0039] In some embodiments of this application, the inner diameter of the main structure is 40-45mm, the wall thickness of the cylinder is 2-4mm, the height of the cylinder is 50-80mm, the groove is tangent to the cylinder, the distance from the outer side of the groove to the center of the cylinder is 30-50mm, the height of the groove is the same as the height of the cylinder, the width of the groove w1 is 10-15mm, and the wall thickness of the groove T1 is 1-4mm.

[0040] In some embodiments of this application, the outer ring diameter of the bottom annular groove is increased by 0.2-1.0 mm based on the inner ring diameter, and the depth of the annular groove is 5-20 mm.

[0041] In some embodiments of this application, the bottom thickness of the electrolytic cell 1 is 15-25 mm, a circular hole is opened at the center of the bottom, the diameter of the circular hole is 0.04-0.4 mm, the depth of the circular hole is 1-4 mm, and the inner ring diameter of the bottom annular groove is 9.5 mm, 13.5 mm, 17.5 mm, 21.5 mm, 25.5 mm, 29.5 mm, 33.5 mm, and 37.5 mm, respectively.

[0042] In some embodiments of this application, the electrolytic cell 1 is made of materials such as fiberglass, plastic, or acid-resistant ceramics. It must have a certain hardness, not be deformed, not react with the electrolyte, and be able to withstand the corresponding temperature and vibration of the electropolishing test.

[0043] In some embodiments of this application, the medical guidewire is designed with a relatively large diameter at its tip, so electrolysis is not required. The medical guidewire that needs to be polished is inserted into the bottom circular hole of the electrolytic cell 1 as the anode. The diameter of the circular hole is interference-fitted with the diameter of the medical guidewire to ensure that the guidewire in the circular hole does not undergo an electrolytic reaction, and at the same time, it plays a fixing role to prevent the guidewire from slipping out.

[0044] In some embodiments of this application, a ring-shaped sheet of metal is used as a metal cathode and is placed in the ring groove at the bottom of the electrolytic cell 1. The sheet of metal is connected to an external wire, and the wire with insulation is led out through the protrusion of the electrolytic cell 1 to the negative terminal of the power supply, ensuring that the wire outside the ring is not exposed in the electrolyte, and that the wire with the insulation removed is in full contact with the sheet of metal.

[0045] In some embodiments of this application, such as Figure 2 As shown, the upper clamp 2 is a ring-shaped structure with a ring groove inside. At the three equal divisions of the arc inside the ring, there is a column-shaped support member. The three column-shaped support members intersect at the center of the ring. At the center of the ring, there is a cylindrical structure with a through hole, and the center of the cylinder coincides with the center of the ring.

[0046] In some embodiments of this application, the inner diameter of the ring is 7-36 mm, the outer diameter of the ring is 2-8 mm larger than the inner diameter, and the height of the ring is 3-8 mm; the inner diameter of the ring groove is 8-37 mm, the outer diameter of the ring is 0.2-1.0 mm larger than the inner diameter of the ring groove, and the depth of the ring groove is 2-7 mm; the height of the columnar support is 3-8 mm, the width of the columnar support is 1-6 mm, the diameter of the cylinder is 3-13 mm, the height of the cylinder is the same as the height of the ring, the center of the through hole in the cylinder coincides with the center of the ring, and the diameter of the through hole is 0.04-0.4 mm.

[0047] In some embodiments of this application, the upper clamp 2 is made of materials such as resin, plastic, or ceramic, and must ensure a certain degree of hardness, prevent deformation, and not react with the electrolyte.

[0048] In some embodiments of this application, the medical guide wire that needs to be polished is passed through the through hole of the upper clamp 2, and the diameter of the through hole is interference-fitted with the diameter of the medical guide wire, thereby ensuring that the guide wire in the round hole does not undergo an electrolytic reaction.

[0049] In some embodiments of this application, the upper end of the annular thin metal cathode is inserted into the annular groove in the upper clamp 2 to ensure that the center of the upper clamp 2 coincides with the center of the bottom circular hole of the electrolytic cell 1.

[0050] In some embodiments of this application, such as Figure 3 As shown, the upper cover 3 has a flange-shaped structure with an inner diameter of 34-42mm and an outer diameter of 48-52mm. A 1-4mm annular region with a height of 4-15mm extends from the outer edge of the inner diameter. The height of this annular region relative to the outer diameter of the upper cover 3 is 0.5-8mm lower than the height of the annular region surrounding the inner diameter. At each of the four equal divisions of the arc within the upper cover 3, there is a columnar support with a height of 2-10mm and a width of 1-4mm. These four columnar supports intersect at the central cylinder of the upper cover 3. At the center of the upper cover 3, there is a cylindrical structure with a through hole, the center of which coincides with the center of the upper cover 3. The cylinder has a diameter of 5-15mm and a height consistent with the columnar supports. The center of the through hole within the cylinder coincides with the center of the upper cover 3, and the through hole has a diameter of 0.04-0.4mm.

[0051] In some embodiments of this application, the electrolytic polishing device for a medical guide wire has a top cover 3 made of materials such as fiberglass or high-strength ceramic to ensure a certain degree of hardness, prevent deformation, and avoid reaction with the electrolyte.

[0052] In practical use, the medical guide wire passing through the upper clamp 2 is passed through the through hole of the upper cover 3. The diameter of the through hole is interference-fitted with the diameter of the medical guide wire, thereby improving the coaxiality of the medical guide wire. The medical guide wire passing through the upper clamp 2 is connected to a wire, and the other end of the wire is connected to the positive terminal of the DC power supply, so that the medical guide wire becomes a metal anode.

[0053] In some embodiments of this application, the electrolytic cell 1 contains an electrolyte for electrolytic polishing of medical guidewires.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An electrolytic polishing device for medical guide wires, characterized in that, The utility model provides an electrolytic cell, upper clamp, upper cover, the electrolytic cell includes the cylindrical main body structure and the bulge outward along the diameter direction of cylinder, the bulge is equipped with the recess with the main body structure intercommunication, the recess one end is tangent with the inner diameter of cylindrical main body structure, and the recess other end is from the distance of the center of circle of cylindrical main body structure greater than the radius of cylindrical main body structure, the bulge height is consistent with the cylinder height, the bottom of electrolytic cell is equipped with a plurality of concentric circular ring groove, the upper portion of recess is flush with the upper portion of main body structure, and the lower portion of recess is flush with the upper portion of electrolytic cell bottom circular ring groove, and the center of bottom is opened circular hole, the upper clamp is circular ring, and there is a circular ring recess in the circular ring, and the circular arc three equal division of circular ring inside exists a columnar support respectively, and three columnar supports intersect in the center of circular ring, and the center of circular ring is equipped with the cylinder with through -hole, and the cylinder center coincides with the center of circular ring, and the cylinder height is consistent with the height of circular ring, and the center of circular ring coincides with the cylinder inner through -hole center, the upper cover is flange plate structure, and there is annular area on the inside diameter of upper cover, and the height of outside diameter area of upper cover is lower than the height of annular area on the inside diameter, and the circular arc four equal division of upper cover inside exists a columnar support respectively, and four columnar supports intersect in the center cylinder of upper cover, and the center of upper cover exists the cylindrical structure with through -hole, and the center of cylinder coincides with the center of upper cover, and the cylinder height is consistent with the height of columnar support, and the center of upper cover coincides with the cylinder inner through -hole center, the circular ring thin piece metal is used as metal cathode, and the upper end of circular ring thin piece metal cathode is inserted into the circular ring recess in the upper clamp, and the center of upper clamp is guaranteed with the center of electrolytic cell bottom circular hole coincidence, the medical guide wire that passes through the upper clamp passes through the upper cover through -hole, and the diameter of upper cover through -hole is with the diameter of medical guide wire interference fit, and the coaxial degree of medical guide wire is guaranteed, the medical guide wire that passes through the upper clamp is connected with the wire, and the other end of wire is connected direct current source anode, so that the medical guide wire becomes metal anode, the electrolytic cell is placed electrolyte, and is used for electrolytic polishing to medical guide wire.

2. The electrolytic polishing apparatus for a medical guide wire according to claim 1, wherein The thin piece metal is connected with the wire, and the wire with insulating skin is led out to power negative through the recess of electrolytic cell, so that the wire of circular ring outer part is not exposed in electrolyte, and the wire without insulating skin is fully contacted with thin piece metal.

3. The electrolytic polishing apparatus for a medical guide wire according to claim 1, wherein For the electrolytic cell, the inner diameter of cylindrical main body structure cylinder: 40-45mm, the wall thickness of cylinder: 2-4mm, the height of cylinder: 50-80mm, the bulge is tangent with cylinder, the distance of bulge outside from the center of cylinder is 30-50mm, the height of bulge is consistent with the height of cylinder, the width of bulge w1: 10-15mm, the wall thickness of bulge T1: 1-4mm, there are a plurality of concentric circular ring grooves in the bottom of electrolytic cell, the thickness of bottom: 15-25mm, the center of bottom is opened circular hole, the diameter of circular hole: 0.04-0.4mm, the depth of circular hole: 1-4mm, the inner ring diameter of bottom circular ring groove is 9.5mm, 13.5mm, 17.5mm, 21.5mm, 25.5mm, 29.5mm, 33.5mm, 37.5mm respectively, the outer ring diameter of bottom circular ring groove increases 0.2-1.0mm on the basis of inner ring diameter, the depth of circular ring groove: 5-20mm.

4. The electrolytic polishing apparatus for a medical guide wire according to claim 1, wherein For the upper clamp, the inner diameter of the ring: 7-36mm, the outer diameter increases 2-8mm based on the inner diameter, the ring height 3-8mm; the inner diameter of the ring groove: 8-37mm, the outer diameter of the ring groove increases 0.2-1.0mm based on the inner diameter of the ring groove, the depth of the ring groove 2-7mm; the height of the cylindrical support 3-8mm, the width of the cylindrical support 1-6mm; the diameter of the cylinder: 3-13mm, the diameter of the through hole in the cylinder: 0.04-0.4mm.

5. The electrolytic polishing apparatus for a medical guide wire according to claim 1, wherein The inner diameter of the upper cover is 34-42mm, the outer diameter of the upper cover is 48-52mm, the height of the annular area is 4-15mm; the height of the outer diameter area of the upper cover is lower than the outer annular area of the inner diameter of the upper cover, the height difference is 0.5-8mm; the outer side of the inner diameter of the upper cover has an annular area of 1-4mm; the height of the cylindrical support is 2-10mm, the width of the cylindrical support is 1-4mm; the diameter of the cylindrical structure with a through hole at the center of the upper cover is 5-15mm, the diameter of the through hole at the center of the upper cover is 0.04-0.4mm.

6. The electrolytic polishing apparatus for a medical guide wire according to claim 1, wherein The electrolytic cell is one of glass steel, plastic and acid-resistant ceramic.

7. The electrolytic polishing apparatus for a medical guide wire according to claim 1, wherein The upper clamp is one of resin, plastic and ceramic material.

8. The electrolytic polishing apparatus for a medical guide wire according to claim 1, wherein The upper cover is one of glass steel and ceramic material.

9. The electrolytic polishing apparatus for a medical guide wire according to claim 1, wherein A temperature sensor is placed in the electrolytic cell for detecting the temperature of the polishing liquid.

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