Electrocoagulation hook

Abstract

The utility model discloses an electrocoagulation hook for minimally invasive surgery. The electrocoagulation hook structurally comprises a grab handle, a fixed section, a telescopic section, an insulating sleeve and a power supply cable. The fixed section is fixedly inserted into the grab handle in the axial direction, and the telescopic section is inserted into the fixed section in the axial direction and can stretch out and draw back in a sliding mode relative to the fixed section. An oval-section guiding sliding groove is formed in the fixed section, the appearance of the telescopic section is matched with the oval-section guiding sliding groove, and radial limiting and fixing are achieved through the geometrical characteristics of the oval section. The electrocoagulation hook is reasonable in structural design and complete in function, accuracy, safety and operation convenience of minimally invasive surgery can be remarkably improved, and the electrocoagulation hook has important clinical application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical instruments, in particular to minimally invasive surgical instruments, especially an electrocautery hook for diagnosing and treating cervical diseases. BACKGROUND

[0002] In the field of minimally invasive surgery, the electrocautery hook is a key surgical instrument for diagnosing and treating cervical diseases. Currently, the electrocautery hooks on the market mainly adopt a round tube telescopic structure. Although this design can achieve the basic telescopic function, it has many shortcomings in actual surgical operations, which seriously affect the accuracy, safety and operation efficiency of the surgery. First, the round tube telescopic structure is prone to radial deviation during telescopic operation, which is caused by the insufficient mechanical stability of the round tube structure and the precision limitation of the internal transmission mechanism. Specifically, when the doctor controls the electrocautery hook to extend or retract through the handle, the position and angle of the hook head may change slightly. This change is particularly evident in minimally invasive surgery, which requires high precision. For example, during the resection of cervical lesion tissue, slight deviation of the hook head may result in inaccurate resection range, and even may injure the surrounding healthy tissue, affecting the surgical effect and patient recovery. Second, the existing electrocautery hook often needs to be rotated and positioned during surgery, but due to the limitations of its structural design, the hook head is easily blocked by cervical tissue or other human tissues during operation, and the doctor cannot intuitively determine the specific direction and position of the hook head. The lack of visual feedback not only increases the complexity of the surgery, but also may prolong the operation time and increase the risk to the patient. For example, when the lesion tissue needs to be accurately hooked, the doctor may need to adjust the position of the hook head several times, which not only reduces the operation efficiency, but also may increase the pain and discomfort of the patient. In addition, the existing electrocautery hook also has obvious defects in the indication of the power-on state. Most products have the power-on indicator light set in the handle, and even some products do not have the indicator light at all. This design makes it difficult for the doctor to quickly confirm the power-on state of the knife during the operation, increasing the uncertainty and potential risk of the operation. For example, during the electrocautery process, if the doctor cannot confirm whether the hook head is powered on in time, it may result in unsatisfactory electrocautery effect, and even may cause unnecessary damage to the patient due to misoperation.

[0003] The root of these deficiencies lies in the fact that the design of the existing electrocautery hook fails to fully combine the actual needs of surgical operation and the characteristics of human tissues. The radial deviation problem of the round tube telescopic structure is caused by the simplicity and insufficient stability of its mechanical structure, while the difficulty in judging the direction of the hook head is due to the lack of effective visual feedback mechanism. The improper or missing position of the power-on indicator light reflects the neglect of user experience and surgical efficiency in the design. The existence of these problems not only limits the performance of the electrocautery hook, but also to some extent affects the overall effect of minimally invasive surgery.

[0004] In order to solve these problems, it has important clinical significance and application value to develop a new type of telescopic electrocautery hook. Utility model content

[0005] The application aims to provide an electrocautery hook with reasonable structure design and perfect function, which overcomes the shortcomings of the prior art by the cooperation design of the elliptical cross-section guide sliding groove, the strip-shaped through groove and the protrusion, the tolerance cooperation of the sliding damping and the setting of the power-on state indicating lamp, and significantly improves the accuracy, safety and operation convenience of minimally invasive surgery.

[0006] To achieve the above-mentioned purpose, the application discloses an electrocautery hook for minimally invasive surgery, and the structure design of the electrocautery hook comprises a handle, a fixed segment, a telescopic segment, an insulating sleeve and a power supply cable. The fixed segment is fixedly inserted into the handle along the axial direction, and the telescopic segment is inserted into the fixed segment along the axial direction and can slide and telescope relative to the fixed segment. An elliptical cross-section guide sliding groove is arranged in the fixed segment, and the outer shape of the telescopic segment is matched with the elliptical cross-section guide sliding groove. The radial limiting and fixing is realized by the geometric characteristics of the elliptical cross-section, so as to ensure that the telescopic segment only moves along the axial direction in the telescopic process and avoids radial deviation, thereby improving the accuracy and stability of the surgical operation.

[0007] Further, a working hook part formed by bending is arranged at the front end of the telescopic segment, which is used for hooking and electrocoagulating tissues in the operation. The telescopic segment is sleeved with the insulating sleeve, the insulating sleeve extends along the axial direction and avoids the working hook part, so as to ensure that the working hook part can be fully exposed and play a role in the operation process, and meanwhile, the accidental touch or damage of non-target tissues is avoided. The telescopic segment is connected with the external device through the power supply cable penetrating through the elliptical cross-section guide sliding groove, which is used for supplying power to the telescopic segment and realizing the electrocoagulation function. A conductive pluggable interface is arranged at the tail end of the handle, which is used for connecting the external host device. One end of the power supply cable is connected with the telescopic segment, and the other end is connected with the pluggable interface, so as to ensure that the electrocautery hook can realize the electrical connection with the external host device through the pluggable interface. It should be noted that the total length of the power supply cable is greater than the maximum activity stroke of the telescopic segment, so as to ensure that the power supply cable will not be damaged due to excessive stretching when the telescopic segment is fully extended.

[0008] Further, a strip-shaped through groove is arranged in the fixed segment along the axial direction, and the strip-shaped through groove penetrates through the elliptical cross-section guide sliding groove. On the contrary, a protrusion matched with the strip-shaped through groove is arranged on the telescopic segment, the protrusion can slide in the strip-shaped through groove, limits the rotational freedom degree of the telescopic segment, and ensures that the telescopic segment keeps stable axial movement in the telescopic process. An indicating scale is arranged on the inner side of the strip-shaped through groove, and through the cooperation of the indicating scale and the protrusion, the doctor can intuitively read the axial position of the telescopic segment, so as to realize the accurate adjustment of the telescopic length of the telescopic segment. In addition, the design of the protrusion is consistent with the orientation of the working hook part, and the position of the protrusion not only indicates the telescopic state of the telescopic segment, but also intuitively reflects the direction of the working hook part, so as to avoid the difficulty in direction judgment caused by the shielding of human tissues.

[0009] Further, the sliding damping between the telescopic section and the fixed section is achieved by the tolerance fit. Specifically, the outer diameter of the telescopic section and the inner diameter of the elliptical cross-section guide slot of the fixed section are matched by a precise tolerance fit, so as to ensure that the telescopic section has a moderate damping force when sliding in the axial direction, thereby avoiding the operation out of control due to too smooth sliding. This sliding damping design not only ensures the stability and controllability of the telescopic section during the operation, but also improves the accuracy of the operation.

[0010] Further, the electric coagulation hook of the present application also optimizes the indication mechanism of the energized state. By providing an energized state indicator light on the protrusion, the doctor can observe the energized state of the knife in real time, ensuring the safety of the operation. The indicator light is directly integrated on the protrusion, which is convenient for quickly confirming the working state of the electric coagulation hook during the operation, and avoids the operation error caused by the unclear energized state. It should be noted that the indicator light is not very bright, but is controlled by a bypass circuit. Specifically, the indicator light is not directly connected to the positive and negative poles, but is connected to only one pole of the device, like the electric coagulation hook. When the electric coagulation hook is turned on, the indicator light will light up, thereby directly reflecting the working state of the electric coagulation hook.

[0011] In summary, the present application solves the deficiencies of the existing electric coagulation hook in radial deviation, direction judgment, telescopic accuracy and operation stability, etc. through the cooperation design of the elliptical cross-section guide slot and the telescopic section, the axial position indication mechanism of the strip-shaped through slot and the protrusion, the tolerance fit design of the sliding damping, and the setting of the energized state indicator light. The electric coagulation hook has a reasonable structure design, perfect functions, and can significantly improve the accuracy, safety and operation convenience of minimally invasive surgery, and has important clinical application value.

[0012] The above-listed beneficial effects are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementation manners will be further disclosed in the embodiments or other description parts of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0013] Aspects of the present disclosure will become more fully understood from the detailed description and accompanying drawings that follow, and wherein:

[0014] Figure 1 is a structural schematic diagram of an embodiment of the present application.

[0015] Figure 2 is a structural schematic diagram of an embodiment of the present application from another perspective. DETAILED DESCRIPTION

[0016] The present disclosure will be described with reference to the attached drawings, which are presented for the purpose of illustration and description. It is to be understood that the present disclosure can be presented in a multitude of different forms and that the present disclosure is not limited to the embodiments set forth herein and illustrated in the drawings. Rather, the embodiments presented herein are meant to provide a more complete understanding of the present disclosure and to provide a detailed description of the present disclosure. It should be understood that the embodiments disclosed herein can be combined in a variety of ways to provide additional embodiments.

[0017] It should be understood that like reference numerals refer to like elements throughout the various figures. In the drawings, the size of some features can be exaggerated for clarity.

[0018] It should be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. For the purposes of the present disclosure, the terms “a” (or “an”), “the”, and “said” are defined to mean one or more unless explicitly stated otherwise. The terms “including”, “comprising”, and “having” are defined to mean comprising, including, and having, respectively, unless explicitly stated otherwise.

[0019] As used herein, the singular forms “a”, “an” and “the” include plural referents unless the context clearly dictates otherwise. As used herein, the terms “including”, “comprising” and “containing” are used synonymously to refer to the presence of the stated feature or features, but do not preclude the presence of one or more other features. Embodiments

[0020] The present embodiment provides an exemplary structure of an electric coagulation hook that can achieve a telescopic function, which is suitable for the diagnosis and treatment of cervical diseases in minimally invasive surgery.

[0021] Referring to the accompanying drawings Figure 1 and 2 In the present embodiment, the structure of the electric coagulation hook includes a handle 1, a fixed section 2, a telescopic section 3, an insulating sleeve 4, and a power cable.

[0022] The handle 1 is designed in accordance with human engineering, and the surface is provided with anti-slip texture, which facilitates the stable holding of the doctor during surgery.

[0023] The tail end of the handle 1 is provided with a conductive pluggable interface 5 for connecting an external host device. The fixed section 2 is fixedly inserted into the handle 1 along the axial direction, and is firmly fixed through threaded connection or buckle structure.

[0024] The inside of the fixed section 2 is provided with an elliptical cross-section guide chute, the inner diameter of the chute is matched with the outer diameter of the telescopic section 3 by a tolerance, which ensures that the telescopic section 3 has a moderate damping force during sliding, avoiding the operation out of control due to too smooth sliding.

[0025] The telescopic section 3 is inserted into the fixed section 2 along the axial direction and can slide relative to the fixed section 2. The outer shape of the telescopic section 3 is matched with the elliptical cross-section guide chute, and the radial limiting and fixing is realized through the geometric characteristics of the elliptical cross-section, which ensures that the telescopic section 3 only moves along the axial direction during the telescopic process, avoiding radial deviation.

[0026] The front end of the telescopic section 3 is provided with a working hook part 6 formed by bending, and the bending angle of the working hook part 6 is designed according to the surgical requirements, usually 90° to 120°, to ensure that the target tissue can be effectively hooked or coagulated during the operation.

[0027] The telescopic section 3 is externally sleeved with an insulating sleeve made of medical-grade high polymer material, which extends along the axial direction and avoids the working hook part 6, ensuring that the working hook part 6 can be fully exposed and play a role during operation, while avoiding accidental touch or damage to non-target tissue.

[0028] The telescopic section 3 is connected with the pluggable interface 5 at the tail end of the handle 1 through the power cable passing through the elliptical cross-section guide chute, and the power cable adopts flexible wire with good conductivity and bending resistance for power supply to the telescopic section 3 to realize the coagulation function. It should be noted that the total length of the power cable is greater than the maximum travel of the telescopic section 3, to ensure that the power cable will not be damaged due to excessive stretching when the telescopic section 3 is fully extended.

[0029] The fixed section 2 is provided with a strip-shaped through groove 8 along the axial direction, which penetrates the elliptical cross-section guide chute. On the contrary, the telescopic section 3 is provided with a protrusion 7 matched with the strip-shaped through groove 8, and the height of the protrusion 7 matches the depth of the strip-shaped through groove 8, ensuring that the protrusion 7 can slide in the strip-shaped through groove 8, limiting the rotational freedom of the telescopic section 3, and ensuring that the telescopic section 3 maintains stable axial movement during the telescopic process. The width of the strip-shaped through groove 8 is slightly larger than the width of the protrusion 7 on the telescopic section 3, ensuring that the protrusion 7 can slide freely in the strip-shaped through groove 8.

[0030] The inner side of the strip-shaped through groove 8 is provided with an indicating scale 9, which is made by laser etching or printing process, and the scale interval is usually 1mm. Through the cooperation of the indicating scale 9 and the protrusion 7, the doctor can intuitively read the axial position of the telescopic section 3, thereby realizing the accurate adjustment of the telescopic length of the telescopic section 3.

[0031] In addition, the design of the protrusion 7 is consistent with the orientation of the working hook part 6, and the position of the protrusion 7 not only indicates the telescopic state of the telescopic section 3, but also can intuitively reflect the direction of the working hook part 6, avoiding the difficulty of direction judgment due to the shielding of human tissue.

[0032] It needs to be understood that the sliding damping between the telescopic section 3 and the fixed section 2 is realized through a tolerance fit. Specifically, the outer diameter of the telescopic section 3 and the inner diameter of the elliptical section guiding sliding groove 6 of the fixed section 2 are in a tolerance fit, and the tolerance range is usually 0.01-0.05 mm, which ensures that the telescopic section 3 has a moderate damping force when sliding in the axial direction, avoiding the loss of control due to too smooth sliding. This sliding damping design not only ensures the stability and controllability of the telescopic section 3 during surgery, but also improves the accuracy of the operation. For example, during the resection of cervical lesion tissue, the doctor can control the telescopic length of the telescopic section 3 through the handle 1, and at the same time, accurately adjust the position of the working hook part 6 through the indication scale 9 of the strip-shaped through groove 8, ensuring the accuracy of the resection range.

[0033] More specifically, the electrocautery hook of the present embodiment also optimizes the indication mechanism of the power-on state. By providing a power-on state indicator light 10 on the protrusion 7, the doctor can observe the power-on state of the tool in real time, ensuring the safety of the operation. It needs to be noted that the indicator light 10 is not very bright, but is controlled through a bypass circuit. Specifically, the indicator light 10 is not directly connected to the positive and negative poles, but is connected to only one pole of the device, just like the electrocautery hook. When the electrocautery hook is turned on, the indicator light 10 will light up, thus intuitively reflecting the working state of the electrocautery hook.

[0034] The indicator light 10 uses an LED light source, which is directly integrated on the protrusion 7 and is packaged through transparent or translucent materials to ensure the visibility of the indicator light 10. The color of the indicator light 10 is usually green (power on) and red (disconnected from the human body), which facilitates the doctor to quickly confirm the working state of the electrocautery hook during the operation, avoiding operation errors due to unclear power-on state. For example, during electrocoagulation, the doctor can quickly judge whether the electrocautery hook is in the power-on state by observing the color change of the indicator light 10 on the protrusion 7, thus ensuring the idealness of the electrocoagulation effect.

[0035] It needs to be noted that the circuit composition related to the indicator light 10 belongs to the common technical knowledge of those skilled in the art. Specifically, the circuit includes an LED light source, a current-limiting resistor, and a bypass circuit. The LED light source is connected to the bypass circuit through the current-limiting resistor, one end of the bypass circuit is connected to the conductive part of the electrocautery hook, and the other end is connected to one pole of the external device. When the electrocautery hook is turned on, the current flows through the LED light source through the bypass circuit, causing it to emit light; when the electrocautery hook is powered off, the bypass circuit is disconnected, and the LED light source is extinguished. This circuit design is simple and reliable, and can effectively realize the indication function of the power-on state.

[0036] Further, the selection of the driving circuit of the LED light source, the current-limiting resistor and the specific design of the bypass circuit all belong to the common knowledge of those skilled in the art. For example, the resistance value of the current-limiting resistor is selected according to the operating voltage and current demand of the LED light source to ensure that the LED light source operates within a safe range. The design of the bypass circuit is optimized according to the electrical characteristics of the electrocautery hook and the power supply parameters of the external device to ensure the stability and reliability of the circuit. Specifically, the bypass circuit can use a simple diode or transistor circuit to control the on-off of the current. When the electrocautery hook is turned on, the diode or transistor in the bypass circuit is turned on, and the current flows through the LED light source, causing it to emit light; when the electrocautery hook is turned off, the diode or transistor in the bypass circuit is turned off, and the current cannot flow through the LED light source, causing it to extinguish.

[0037] In addition, the packaging materials and processes of the LED light source also belong to the common knowledge of those skilled in the art. For example, the LED light source can be packaged in SMD (Surface Mount Device) and fixed on the protrusion 7 by reflow soldering process. The packaging material of the LED light source is usually epoxy resin or silicone, which has good transparency and high temperature resistance, ensuring that it will not be damaged by high temperature during the operation.

[0038] It should be understood that the circuit composition and design principle related to the indicator light 10 all belong to the common knowledge of those skilled in the art, and this embodiment will not be described again. This circuit design not only realizes intuitive indication of the power-on state, but also ensures the safety and convenience of the operation, which has important clinical application value.

[0039] In actual use, the operation steps of the electrocautery hook are as follows: first, the doctor controls the extension length of the telescopic section 3 by the handle 1, so that the working hook part 6 reaches the target position. In this process, the elliptical cross-section guide slot ensures that the telescopic section 3 only moves in the axial direction, avoiding radial deviation. Second, the doctor adjusts the position and direction of the working hook part 6 accurately by the cooperation of the indicator scale 9 of the strip-shaped through slot 8 and the protrusion 7, ensuring the accuracy of the operation. Then, the doctor observes the power-on state indicator light 10 on the protrusion 7 to confirm whether the electrocautery hook is in the power-on state, and performs electrocoagulation operation as needed. Finally, after the operation is completed, the doctor retracts the telescopic section 3 into the fixed section 2 to ensure the safe storage of the electrocautery hook.

[0040] It should be noted that the parts not disclosed in detail in the present embodiment, such as the specific anti-slip texture design of the handle 1, the connection mode (such as the specific parameters of the thread connection or the buckle structure) of the fixed segment 2 and the handle 1, and the selection of the conductive material of the power cable, all belong to the known technology or prior art of those skilled in the art, and those skilled in the art can select and adjust according to the actual needs. In addition, the processing technology of the elliptical cross-section guide sliding groove, the etching or printing process of the indicating scale 9, and the specific circuit design of the LED indicator light 10 also belong to the scope of the prior art, and the present embodiment will not be described again.

[0041] Although exemplary embodiments of the present disclosure have been described, those skilled in the art will understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the additional claims, and the equivalents of these claims are also included.

Claims

1. An electrocautery hook, characterized in that, The handle, the fixed section, the telescopic section, the insulating sleeve and the power cable; The fixed section is axially inserted into the handle, and the telescopic section is axially inserted into the fixed section and can slide relative to the fixed section; The fixed section is internally provided with an elliptical cross-section guide slot, and the telescopic section is externally provided with a shape matching the elliptical cross-section guide slot, so that the radial limiting and fixing is realized through the geometric characteristics of the elliptical cross-section, and the telescopic section is ensured to move only in the axial direction during the telescopic operation; The front end of the telescopic section is provided with a working hook part formed by bending, which is used for hooking or coagulating tissues during the operation; The telescopic section is externally provided with an insulating sleeve, which extends in the axial direction and avoids the working hook part; The telescopic section is connected with the external device through the power cable passing through the elliptical cross-section guide slot, and is used for supplying power to the telescopic section; The tail end of the handle is provided with a conductive pluggable interface, one end of the power cable is connected with the telescopic section, and the other end is connected with the pluggable interface; The fixed section is axially provided with a strip-shaped through slot, and the strip-shaped through slot penetrates the elliptical cross-section guide slot; The telescopic section is provided with a protrusion matching the strip-shaped through slot, and the protrusion can slide in the strip-shaped through slot to limit the rotational freedom of the telescopic section; The inner side of the strip-shaped through slot is provided with an indicating scale, and the axial position of the telescopic section can be directly read through the cooperation of the indicating scale and the protrusion; The protrusion is provided with a power-on state indicating lamp, and the indicating lamp is controlled through a bypass circuit and is connected with only one pole of the device, so that the indicating lamp is bright when the coagulation hook is turned on.

2. An electrocautery hook according to claim 1, wherein, The total length of the power cable is greater than the maximum travel of the telescopic section.

3. An electrocautery hook according to claim 1, wherein, The telescopic section and the fixed section are connected through a tolerance fit to realize the sliding damping.

4. An electrocautery hook according to claim 1, wherein, The protrusion is designed to be consistent with the orientation of the working hook part.

5. An electrocautery hook according to claim 1, wherein, The indicating lamp is directly integrated on the protrusion.

Images