Bipolar surgical electrode with variable working width

Abstract

The utility model relates to a bipolar operation electrode with variable working width, which comprises an electrode tip end, two stainless steel tubes and a binding post which are sequentially connected along the front-back direction, and the binding post is also connected with a cable assembly; the stainless steel pipe comprises a first pipe section, a second pipe section and a transition pipe section used for connecting the first pipe section and the second pipe section. When the first pipe sections or the transition pipe sections are set to be subjected to external force, the distance between the first pipe sections or the transition pipe sections can be adjusted, and then the width of the electrode tip end can be adjusted. According to the utility model, under the condition that the diameter of the sheath tube of the resectoscope is not changed, the width of the tip end of the electrode is increased, so that the aim of improving the operation cutting efficiency is fulfilled.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a bipolar surgical electrode with variable working width. Background Art

[0002] In the field of electrosurgery, bipolar surgical electrodes are a commonly used instrument that can be used in conjunction with a resectoscope and are widely used in minimally invasive electrosurgical surgeries in urology and gynecology.

[0003] For specific structure, see Fig.15 The traditional bipolar surgical electrode is mainly composed of an electrode tip, a ceramic tube, a stainless steel tube, a terminal, and a cable assembly. The electrode tip and the stainless steel tube form a bipolar. Under high voltage and high frequency, in the medium of physiological saline, a thin layer of plasma is formed around the electrode tip to cut and coagulate human soft tissue. The ceramic tube is used to prevent the bipolar from direct contact and short circuit. The terminal is used to connect the stainless steel tube and the cable assembly. There is a line connecting the electrode tip and the stainless steel tube in the cable assembly. The plug at the end is used to connect the host to receive high voltage and high frequency energy.

[0004] In the prior art, the width of the electrode tip is fixed, so that the width of the tissue that can be cut each time is fixed. Since the bipolar surgical electrode needs to be inserted into the resectoscope sheath for use, the maximum width of the electrode tip must be smaller than the inner diameter of the resectoscope sheath. The resectoscope sheath enters the body through a natural channel or an artificial channel of the human body. Considering the limitations of the natural channel and the fact that the larger the wound of the artificial channel, the greater the harm to the patient, the diameter of the resectoscope sheath should not be too large, which also limits the width of the electrode tip. Therefore, the cutting efficiency of the bipolar surgical electrode in the prior art is relatively low, and the operation time is long. This is a problem that needs to be solved in this field. Utility Model Content

[0005] The utility model aims to provide a bipolar surgical electrode with variable working width, which can change the size of the electrode tip and thus improve the efficiency of cutting and coagulation.

[0006] The utility model is realized by the following technical scheme: a bipolar surgical electrode with variable working width comprises an electrode head end, two stainless steel tubes and a terminal connected in sequence along the front-back direction, and a cable assembly is also connected to the terminal;

[0007] The stainless steel pipe comprises a first pipe section, a second pipe section and a transition pipe section for connecting the first pipe section and the second pipe section; the two first pipe sections are parallel and have a certain interval, and the two second pipe sections are arranged side by side; so that the two transition pipe sections are arranged in a V shape;

[0008] The outer circumferences of the two second pipe sections between the terminal post and the transition pipe section are also covered with insulating sleeves;

[0009] The electrode tip includes an arc segment and an extension segment provided at each end of the arc segment; the two extension segments extend into the two first pipe segments respectively, and a ceramic tube is connected between the extension segment and the first pipe segment;

[0010] The first pipe segments or transition pipe segments are configured to adjust the distance between the first pipe segments or transition pipe segments when subjected to external force, thereby achieving adjustment of the width of the electrode tip.

[0011] Compared with the previous technology, the beneficial effects of the utility model are:

[0012] 1. The utility model achieves the purpose of widening the electrode tip end while keeping the diameter of the resectoscope sheath tube unchanged, thereby improving the surgical cutting efficiency.

[0013] 2. The width of the electrode tip can be customized to a certain extent by using balloons of different specifications, and the width of the electrode tip can also be fine-tuned by using the different degrees of movement of the expansion cylinder. Both designs can give doctors more choices.

[0014] 3. In Example 3, a metal material with good toughness is used to manufacture the stainless steel tube, which can recover after deformation. Such a design can bring more convenience to the surgery, make the operation easier, and provide a wider field of vision. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The electrode structure of Example 1 is provided with a balloon;

[0016] Figure 2 This is a structural schematic diagram of Example 1 in which the balloon expansion drives the electrode tip to expand;

[0017] Figure 3 This is a diagram showing the effect of Example 1 when the electrode tip is not enlarged;

[0018] Figure 4 This is a diagram showing the effect of enlarging the electrode tip in Example 1;

[0019] Figure 5 This is a rendering of the coordination between the balloon and the balloon sheath in Example 1;

[0020] Figure 6 The electrode structure of Example 2 is provided with an expanded cylinder;

[0021] Figure 7 This is a diagram showing the effect of Example 2 when the expansion cylinder does not drive the electrode tip to expand;

[0022] Figure 8 This is a diagram showing the effect of the expansion cylinder driving the electrode tip to expand in Example 2;

[0023] Fig. 9 This is a diagram showing the effect of Example 2 when the electrode tip is not enlarged;

[0024] Fig.10 This is a diagram showing the effect of enlarging the electrode tip in Example 2;

[0025] Fig.11 Schematic diagram of the electrode tip structure of Example 3;

[0026] Fig.12 It is the normal size of the electrode tip of Example 3 when it is not retracted;

[0027] Fig.13 The electrode tip of Example 3 is folded and can pass through the sheath of the resectoscope;

[0028] Fig.14 Schematic diagram of the electrode structure of Example 3;

[0029] Fig.15 Schematic diagram of electrode structure under the prior art.

[0030] Explanation of reference numerals: 11 electrode tip, 111 arc segment, 112 extension segment, 113 ceramic tube, 12 stainless steel tube, 121 first tube segment, 122 second tube segment, 123 transition tube segment, 124 insulating sleeve, 125 resectoscope sheath, 13 terminal, 14 cable assembly, 15 balloon, 151 balloon sheath, 16 expansion cylinder, 161 pull rod. DETAILED DESCRIPTION

[0031] The utility model is described in detail below in conjunction with the accompanying drawings, but the protection content of the utility model is not limited to the following:

[0032] like Figures 1 to 14 As shown, a bipolar surgical electrode with a variable working width comprises an electrode tip 11, two stainless steel tubes 12 and a terminal 13 connected in sequence along the front-to-back direction, and a cable assembly 14 is also connected to the terminal 13;

[0033] The stainless steel pipe 12 includes a first pipe section 121, a second pipe section 122, and a transition pipe section 123 for connecting the first pipe section 121 and the second pipe section 122; the two first pipe sections 121 are parallel and have a certain interval, the two second pipe sections 122 are arranged side by side, and the plane where the two second pipe sections 122 are located is different from the plane where the first pipe section 121 is located; so that the two transition pipe sections 123 are arranged in a V shape;

[0034] The outer circumferences of the two second pipe sections 122 between the terminal 13 and the transition pipe section 123 are also sleeved with insulating sleeves 124;

[0035] The electrode tip 11 includes an arc segment 111 and an extension segment 112 provided at both ends of the arc segment 111; the two extension segments 112 extend into two first pipe segments 121 respectively, and a ceramic tube 113 is connected between the extension segment 112 and the first pipe segment 121;

[0036] The arc section 111 is bent upward relative to the extension section 112 and forms a certain angle with the extension section 112;

[0037] The first tube section 121 or the transition tube section 123 is configured to adjust the distance between the first tube sections 121 or the transition tube sections 123 when subjected to external force, thereby adjusting the width of the electrode tip 11. The utility model achieves the purpose of expanding the width of the electrode tip through three embodiments, which can improve the cutting efficiency of the bipolar surgical electrode. During surgery, the width of the electrode tip is generally expanded before the electrode tip of the bipolar surgical electrode is extended from the resectoscope sheath to perform the cutting and coagulation operation.

[0038] Embodiment 1:

[0039] A first expansion component is provided between the two first tube sections 121. The first expansion component is a balloon 15 provided between the two first tube sections 121. The rear end of the balloon 15 is provided with an interface that can be connected to a pressure pump.

[0040] A balloon sheath tube 151 is disposed inside the insulating sleeve 124 , and a front end of the balloon sheath tube 151 extends out of the insulating sleeve 124 and is connected to the balloon 15 .

[0041] The extension section 112 is fixedly connected to the ceramic tube 113; the ceramic tube 113 is fixedly connected to the stainless steel tube 12, so that the stainless steel tube 12 can drive the electrode tip 11 to deform synchronously. The fixed connection here is achieved by glue.

[0042] The structure of Example 1 and the enlarged effect of the electrode tip are as follows: Figures 1 to 5 As shown. After the electrode is extended from the resectoscope sheath, the bipolar surgical electrode can be extended from the resectoscope sheath by the control of the operating handpiece of the resectoscope. This is the general operation of the traditional resectoscope and surgical electrodes and will not be described here. The electrode tip, ceramic tube, first tube segment and transition tube segment are completely extended from the resectoscope sheath. Then use a pressure pump to connect the interface at the tail of the balloon (not marked in the figure), and let the physiological saline fill into the balloon from the interface to expand the balloon. During the expansion of the balloon, the first tube segment is squeezed and the first tube segment and the second tube segment are deformed. The deformation of the first tube segment and the second tube segment increases the distance between the two stainless steel tubes, thereby achieving the expansion of the electrode tip.

[0043] contrast Figure 3 and Figure 4It can be seen that the width of the electrode tip 1 after the balloon 5 is expanded is wider than that before the balloon 5 is expanded, and the height is shorter than that before the balloon 5 is expanded.

[0044] The balloon 15 has various specifications, and the width of the electrode tip 11 can be controlled by selecting balloons 15 of different specifications. The balloon expansion process changes uniformly, so the expansion of the electrode tip also changes uniformly, and the ultimate limit of the electrode tip expansion width is determined by the maximum diameter of the balloon after filling.

[0045] After the electrode tip is expanded with the balloon, the saline in the balloon needs to be discharged through the interface at the end (not shown in the figure), the balloon diameter is reduced, and it is withdrawn into the balloon sheath. Then the energy under the saline infusion is started to stimulate the electrode to cut / coagulate soft tissue. This is to ensure that the balloon does not touch the electrode tip that generates the plasma thin layer, causing unnecessary damage, and at the same time does not affect the operating space of the electrode tip.

[0046] Finally, after completing the cutting / coagulation of soft tissue, the part of the bipolar surgical electrode extending from the resectoscope sheath needs to be retracted into the resectoscope sheath. Since the transition tube section is in the shape of a triangle with one end merged and the other end forked, when the bipolar surgical electrode is retracted with the operating handpiece of the resectoscope, the shape of the transition tube section has a guiding effect. By utilizing the elastic deformation of the transition tube section with a guiding effect to squeeze the inner wall of the resectoscope sheath, the width of the expanded transition tube section and the electrode tip can be retracted to a point where it can enter the resectoscope sheath. The shape of the electrode tip may not be restored to its original shape during the retraction process, which is somewhat arbitrary, but since the bipolar surgical electrode is disposable, this does not affect its use.

[0047] Embodiment 2:

[0048] A second expansion component is provided between the two transition pipe sections 123. The second expansion component is an expansion cylinder 16 provided between the two transition pipe sections 123. The side surface of the expansion cylinder 16 is in contact with the two transition pipe sections 123.

[0049] The rear side of the expansion cylinder 16 is also connected to two pull rods 161 arranged up and down, and the two pull rods 161 extend in the forward direction and the rear end of the pull rods 161 extends to the terminal 13; so that the expansion cylinder 16 moving forward and backward controls the change of the angle between the two transition pipe sections to adjust the width of the electrode tip 11. The specific structure of Example 2 is as follows Figures 6 to 10 As shown, the insulating sleeve not only plays an insulating role to protect electrical safety, but also can firmly fix the two stainless steel pipes. The expansion cylinder and the two pull rods can be integrally formed, or the two pull rods can be welded to the expansion cylinder.

[0050] In addition, the lower end face of the expansion cylinder should exceed the lower end face of the first tube section, but cannot exceed the inner wall diameter limit of the resectoscope sheath, and the upper end face of the expansion cylinder should exceed the upper end face of the second tube section of the assembly, but cannot exceed the inner wall diameter limit of the resectoscope sheath, so that the expansion cylinder can fully contact the transition tube section when expanding the electrode tip, and the expansion cylinder will not gradually fail to contact the transition tube section due to the inclination of the transition tube section during the expansion process. The two pull rods are respectively located on the upper and lower sides of the insulating sleeve, and are flush and close to the insulating sleeve.

[0051] like Figure 7 Shown, looking from top to bottom Figure 6 The bipolar surgical electrode has a side surface of the expansion cylinder that is tangent to the transition tube segment and is located at the intersection of the transition tube segment and the first tube segment.

[0052] During the operation, the bipolar surgical electrode is extended from the resectoscope sheath by the operating handpiece of the resectoscope. This is the general operation of the traditional resectoscope and surgical electrode, which will not be repeated here. The electrode head, ceramic tube, first tube section and transition tube section are completely extended from the resectoscope sheath. The two pull rods will extend all the way to the rear end of the resectoscope. Pull the two pull rods hard at the rear end. As the expansion cylinder gets closer and closer to the second tube section, the expansion cylinder will squeeze the transition tube section to both sides and deform it, while the second tube section is firmly bound by the insulating sleeve.

[0053] In this process, one end of the transition pipe section close to the second pipe section does not move, and the other end expands to both sides, increasing the distance between the two stainless steel tubes. Since the electrode tip and the ceramic tube are fixed with glue, and the ceramic tube and the two stainless steel tubes are fixed with glue, the electrode tip is also driven to become wider. The electrode tip is made of thin and tough metal, while the expansion cylinder and the two stainless steel tubes are made of hard metal with good strength, and the diameter is 3-4 times greater than the diameter of the electrode tip. In this way, the strength of the electrode tip is not as good as that of the expansion cylinder and the two stainless steel tubes, and it will be deformed by them.

[0054] The extension section 112 is fixedly connected to the ceramic tube 113; the ceramic tube 113 is fixedly connected to the stainless steel tube 12, so that the stainless steel tube 12 can drive the electrode tip 11 to deform synchronously. The fixed connection here is achieved by glue.

[0055] Finally, after the operation is completed, the bipolar surgical electrode needs to be retracted from the resectoscope sheath. Use two pull rods to retract the expansion cylinder back to the Figure 6 The bipolar surgical electrode can then be retracted using the resectoscope's handpiece.

[0056] Embodiment 3:

[0057] The stainless steel tube 12 is made of a metal material with good toughness. A terminal 13 extends from the rear end of the second tube section 122. By pulling the second tube section 122, the transition tube section 123 is retracted into the resectoscope sheath 125, thereby reducing the width of the electrode tip 11. The second tube section 122 is pushed so that the transition tube section 123 leaves the resectoscope sheath 125, thereby widening the width of the electrode tip 11.

[0058] The electrode tip 11 is made of a metal material with high toughness and high elasticity. Generally speaking, the metal material of the electrode tip is recommended to be nickel-titanium alloy, which has been widely used in the field of vascular stents, has good biocompatibility, is a good conductor of electricity, has high elasticity and high toughness, and needs to be compressed into the sheath in the vascular stent to pass through the narrow human blood vessels, and then released from the sheath at a predetermined position to restore to its original size.

[0059] like Figures 11 to 14 As shown, Fig.11 The dashed line is the initial state of the electrode in Example 3, the dashed line is the inner wall of the resectoscope sheath, and the solid line is the state of Example 3 being squeezed and contracted and entering the inner wall of the resectoscope sheath. During the operation, the bipolar surgical electrode is extended from the resectoscope sheath by the operating handpiece of the resectoscope. This is a general operation of a traditional resectoscope and surgical electrode, which will not be repeated here.

[0060] Specifically, the width of the first tube section 121 and the width of the electrode tip 11 are both greater than the width of the inner wall of the resectoscope sheath. The bipolar surgical electrode in this state is retracted into the inner wall of the resectoscope sheath with a suitable retraction tool, and the second tube section 122 is close together and firmly bound by the insulating sleeve 4; during the retraction process, the transition tube section 123 and the second tube section 122 are kept stationary with the connection point as the fulcrum, and the transition tube section 123 rotates along the fulcrum angle, driving the first tube section 121 to shrink the width, and then driving the electrode tip to shrink. When it is necessary to widen, the electrode tip, the ceramic tube, the first tube section and the transition tube section extend from the resectoscope sheath. During the extension process, the electrode tip returns to a free state, and its high elasticity restores it to its original wider width; that is, it drives the first tube section 121, and then drives the transition section 123 to rotate with the connection point of the transition section 123 and the second tube section 122 as the fulcrum, and the width of the first tube section 121 also returns to its original wider width. The transition pipe section is deformed more by the change of the angle between the two pipes rather than the deformation of the material itself, so the deformation is relatively easy and simple to achieve.

[0061] Although the utility model uses specific embodiments and their alternatives to illustrate and describe the utility model, it should be understood that various changes and modifications can be implemented as long as they do not deviate from the spirit and scope of the utility model. Therefore, it should be understood that except for the limitations of the attached claims and their equivalents, the utility model is not limited in any sense.

Claims

1. A bipolar surgical electrode with variable working width, characterized in that: It comprises an electrode head end (11), two stainless steel tubes (12) and a terminal (13) which are sequentially connected in the front-to-back direction, and a cable assembly (14) is also connected to the terminal (13); The stainless steel pipe (12) comprises a first pipe section (121), a second pipe section (122) and a transition pipe section (123) for connecting the first pipe section (121) and the second pipe section (122); the two first pipe sections (121) are parallel and have a certain interval, and the two second pipe sections (122) are arranged side by side, so that the two transition pipe sections (123) are arranged in a V shape; The outer circumferences of the two second pipe sections (122) between the terminal post (13) and the transition pipe section (123) are also sleeved with insulating sleeves (124); The electrode tip (11) comprises an arc segment (111) and an extension segment (112) provided at each end of the arc segment (111); the two extension segments (112) extend into two first pipe segments (121) respectively, and a ceramic tube (113) is connected between the extension segment (112) and the first pipe segment (121); The first pipe sections (121) or the transition pipe sections (123) are configured to be able to adjust the distance between the first pipe sections (121) or the transition pipe sections (123) when subjected to external force, thereby achieving adjustment of the width of the electrode tip end (11).

2. The bipolar surgical electrode with variable working width according to claim 1, characterized in that: A first expansion component is provided between the two first tube segments (121), the first expansion component being a balloon (15) provided between the two first tube segments (121), and an interface being provided at the rear end of the balloon (15); A balloon sheath tube (151) is arranged inside the insulating sleeve (124), and the front end of the balloon sheath tube (151) extends out of the insulating sleeve (124) and is connected to the balloon (15).

3. The bipolar surgical electrode with variable working width according to claim 2, characterized in that: The extension section (112) and the ceramic tube (113) are fixedly connected; the ceramic tube (113) and the stainless steel tube (12) are fixedly connected; thereby, the stainless steel tube (12) can drive the electrode tip (11) to deform synchronously.

4. The bipolar surgical electrode with variable working width according to claim 2, characterized in that: The balloon (15) is provided with various specifications, and the width of the electrode tip (11) can be controlled by selecting balloons (15) of different specifications.

5. The bipolar surgical electrode with variable working width according to claim 1, characterized in that: A second expansion component is provided between the two transition pipe sections (123), and the second expansion component is an expansion cylinder (16) provided between the two transition pipe sections (123), and the side surface of the expansion cylinder (16) is in contact with the two transition pipe sections (123); The rear side surface of the expansion cylinder (16) is also connected to two pull rods (161) arranged up and down, and the two pull rods (161) extend in the forward direction and the rear ends of the pull rods (161) extend to the terminal (13); the expansion cylinder (16) that moves forward and backward controls the change in the angle between the two transition pipe sections, thereby achieving adjustment of the width of the electrode tip (11).

6. The bipolar surgical electrode with variable working width according to claim 5, characterized in that: The extension section (112) and the ceramic tube (113) are fixedly connected; the ceramic tube (113) and the stainless steel tube (12) are fixedly connected; thereby, the stainless steel tube (12) can drive the electrode tip (11) to deform synchronously.

7. The bipolar surgical electrode with variable working width according to claim 1, characterized in that: The stainless steel tube (12) is made of a metal material with good toughness, and a terminal (13) extends from the rear end of the second tube section (122). By pulling the second tube section (122), the transition tube section (123) is retracted into the resectoscope sheath (125), thereby reducing the width of the electrode tip (11); and by pushing the second tube section (122), the transition tube section (123) leaves the resectoscope sheath (125), thereby widening the width of the electrode tip (11).

8. The bipolar surgical electrode with variable working width according to claim 1, characterized in that: The electrode tip (11) is made of a metal material with high toughness and high elasticity.

9. The bipolar surgical electrode with variable working width according to claim 1, characterized in that: The planes on which the two second pipe sections (122) are located are not coplanar with the plane on which the first pipe section (121) is located.

10. The bipolar surgical electrode with variable working width according to claim 1, characterized in that: The arc section (111) bends upward relative to the extension section (112) and forms a certain angle with the extension section (112).

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