Surgical interventional operating instrument

Abstract

The utility model provides a surgical interventional operation instrument, which relates to the field of medical instruments, and comprises an interventional component, a sheathing canal, a handle, a flexible joint linkage assembly and a locking assembly, and the flexible joint linkage assembly comprises a control joint assembly, an execution joint assembly and at least two control lines; the execution joint assembly is connected between the far end of the sheathing canal and the near end of the intervention component; the locking assembly comprises an inner ball body and an outer ball sleeve which is movably sleeved outside the inner ball body so as to be in spherical hinge connection with the inner ball body, and the inner ball body is fixedly connected with the handle; under the action of external force, the outer ball sleeve can abut against and lock the inner ball body, so that the inner ball body and the outer ball sleeve jointly lock and control the motion posture of the joint assembly. The utility model can at least alleviate the technical problems in the prior art that the straight sheathing canal of a surgical interventional operating instrument (such as an electrosurgical operating instrument) is inconvenient for an operator to operate, complicated in operation and long in operation time, the trauma of a patient during the operation is large, and the postoperative recovery of the patient is not facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to a surgical interventional instrument. Background Technology

[0002] In interventional surgical instruments, a sheath is manipulated by a handle to carry the interventional component into the patient's body, reach the lesion site, and perform relevant surgical treatment. Common interventional surgical instruments include electrosurgical instruments.

[0003] The working principle of electrosurgical instruments is as follows: a high-frequency (0.3-5MHz) generator (main unit) emits a high-frequency current with a specific waveform and load power. This current, delivered via electrodes (including electric hooks, electric spatulas, electric rods, and forceps), is applied to the patient's tissue surface, burning the tissue to achieve cutting or hemostasis. Based on the method of electrode application, they are generally divided into monopolar and bipolar systems. Monopolar systems are mostly used for cutting (e.g., monopolar electrosurgery), while bipolar systems are mostly used for coagulation (e.g., bipolar electrocoagulation). Currently, high-frequency electrosurgical technology is developing rapidly, and high-frequency electrosurgical instruments are widely used in general surgery, thoracic surgery, gastroenterology, hepatobiliary surgery, urology, gynecology, and other departments.

[0004] In many clinical scenarios, traditional high-frequency surgical instruments, due to their handles being connected to electrodes via straight sheaths, suffer from a "chopstick effect" during surgery, making it difficult for the operator to directly contact the lesion. For example, in minimally invasive hepatobiliary surgery, procedures such as treating large hepatic cysts near the diaphragm in the left medial lobe of the liver, hepatectomy of the liver apex, tumor enucleation, hemostasis of the postoperative wound base, and breaking down the cyst wall at the "pit bottom" are challenging because the electrodes, driven by the straight sheath, cannot easily reach the lesion. In these situations, the surgeon typically needs to adjust their surgical posture or frequently raise their shoulders, which can easily lead to operator fatigue or occupational diseases. Furthermore, it may be necessary to create an additional instrument access point on the patient's skin to complete the surgery, resulting in inconvenient operation, complex and lengthy procedures, significant trauma to the patient, and hindering postoperative recovery.

[0005] In addition, electrosurgical instruments produce smoke during use. If the smoke is not removed in time, it can harm the operator. Moreover, the smoke under the endoscope can also interfere with the operator's vision, affecting the operation speed and positioning accuracy. Utility Model Content

[0006] The purpose of this invention is to provide a surgical interventional device to alleviate at least one of the aforementioned technical problems in the prior art.

[0007] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0008] This utility model provides a surgical interventional device, including an interventional component, a sheath, and a handle; the interventional component is connected to the distal end of the sheath; the handle is connected to the proximal end of the sheath, and the handle has a loading cavity; in particular, the surgical interventional device further includes a flexible joint linkage assembly and a locking assembly;

[0009] The flexible joint linkage assembly includes a control joint assembly, an actuation joint assembly, and at least two control lines; the control joint assembly and the actuation joint assembly each include a multi-section flexible joint connection unit that is hinged to each other in pairs; the control lines connect all the flexible joint connection units of the control joint assembly and all the flexible joint connection units of the actuation joint assembly in series; the distal end of the actuation joint assembly is fixedly connected to the proximal end of the interventional member;

[0010] The locking assembly includes an inner sphere and an outer ball sleeve that is movably fitted outside the inner sphere for ball-joint connection with the inner sphere. The inner sphere is fixedly connected to the handle. The proximal end of the control joint assembly extends into the loading cavity of the handle and is movably disposed inside the inner sphere. The distal end of the control joint assembly is movably disposed inside the outer ball sleeve and passes through the outer ball sleeve. Under the action of external force, the outer ball sleeve can abut against and lock the inner sphere, so that the inner sphere and the outer ball sleeve together lock the movement posture of the control joint assembly.

[0011] In an optional embodiment, the flexible joint linkage assembly further includes the same number of limiting sleeves as the control lines. The distal end of the control joint assembly is fixedly connected to the proximal end of each of the limiting sleeves, and the proximal end of the execution joint assembly is fixedly connected to the distal end of each of the limiting sleeves. The control lines are correspondingly inserted into the interior of each of the limiting sleeves.

[0012] In an optional embodiment, the control joint assembly further includes a spring, and retaining edges are provided at both axial ends of the control joint assembly. The spring is disposed inside the multi-section flexible joint connecting unit of the control joint assembly, and its two axial ends abut against the retaining edges at the corresponding ends.

[0013] In an optional embodiment, the flexible joint linkage assembly further includes a positioning sleeve, the outer ball sleeve is rotatably fitted outside the proximal end of the positioning sleeve, the distal end of the control joint assembly is fixedly connected to the proximal end of the positioning sleeve, and the control line passes through the interior of the positioning sleeve.

[0014] In an optional embodiment, the surgical interventional instrument is a high-frequency electrosurgical instrument with an electrode as the interventional component; the high-frequency electrosurgical instrument further includes an electrical wire, a wiring terminal connector is installed inside the loading cavity, and the proximal end of the wiring terminal connector protrudes outside the handle for connecting an external cable; the electrical wire passes through the inner cavity of the handle, the sheath and each of the flexible joint connecting units, and its distal end is connected to the electrode and its proximal end is connected to the wiring terminal connector.

[0015] In an optional embodiment, the surgical instrument further includes a smoking structure, the smoking structure comprising:

[0016] The smoking port is located on the circumferential surface of the actuating joint assembly and communicates with the inner cavity of its flexible joint connection unit;

[0017] The negative pressure inhalation tube passes through the lumen of the sheath, the inner cavity of the flexible joint connection unit of the control joint assembly, and the loading channel of the handle, and communicates with the negative pressure inhalation port provided on the handle.

[0018] In an optional embodiment, the wire passes through the negative pressure suction tube;

[0019] The loading channel is provided with a three-way connecting pipe; the three-way connecting pipe has a proximal branch pipe interface, a distal branch pipe interface, and a side branch pipe interface; the proximal end of the negative pressure suction pipe is sealed to the distal branch pipe interface; the side branch pipe interface extends from the negative pressure suction interface on the handle to the outside of the handle; the distal end of the wiring end connector is sealed to the proximal branch pipe interface, and the wire passes through the distal branch pipe interface into the three-way connecting pipe and is connected to the wiring end connector.

[0020] In an optional embodiment, multiple smoke inlets are provided along both the circumferential and axial directions of the actuating joint assembly.

[0021] In an optional embodiment, the smoke inlet of the actuating joint assembly is located in a recessed portion between two adjacent flexible joint connecting units.

[0022] In an optional embodiment, the electrode includes an electrode body and an electrode housing enclosing the electrode body; the distal end of the wire is fixedly connected to the electrode body, and the distal end of the actuating joint assembly is detachably and sealed to the proximal end of the electrode housing.

[0023] The surgical interventional instrument provided in this embodiment of the present invention can achieve at least the following beneficial effects:

[0024] In the structure of this utility model embodiment, the control joint assembly and the execution joint assembly are respectively configured as flexible joint assembly structures with multiple flexible joint connection units to have omnidirectional bending motion capability. The proximal end of the control joint assembly is movable in the inner sphere, and the distal end of the control joint assembly is movable in the outer sphere. In use, the handle serves as the user's (operator's) grip base, with the thumb and index finger placed in the locking assembly, and the remaining fingers and palm naturally gripping the handle. When the intervention component needs to be deflected, the user adjusts the movement posture of the control joint assembly through the thumb and index finger, thereby using the control line to adjust the movement posture of the execution joint assembly, so as to correspondingly drive the position change of the intervention component. When adjusting the movement posture of the control joint assembly, the two ends of the control joint assembly respectively move and abut against the inner sphere and the outer sphere. The outer sphere abuts against the locking inner sphere to lock the two ends of the control joint assembly, thereby achieving the purpose of locking the entire control joint assembly, and thus correspondingly locking the execution joint assembly and the intervention component.

[0025] By applying the surgical interventional instrument provided by this invention, users can flexibly adjust and control the angle of the interventional component, allowing it to omnidirectionally deflect closer to the lesion. The locking assembly is used to lock the position and orientation of the interventional component, thereby treating the lesion through the interventional component. For example, this invention can be applied to high-frequency electrosurgical instruments, using electrodes as interventional components to apply precise electrosurgical energy to the affected area. Alternatively, other interventional components can be used to treat the lesion. The surgical interventional instrument provided by this invention offers flexible, convenient, stable, and reliable operation, reducing operator fatigue, improving surgical efficiency, and allowing for multi-angle adjustment without the need for additional instrument access, thus reducing surgical trauma to the patient and promoting postoperative recovery.

[0026] For other beneficial effects that can be achieved by this utility model, please refer to the detailed description in the specific embodiments section of this specification. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the overall structure of the surgical interventional instrument provided in this embodiment of the utility model;

[0029] Figure 2 for Figure 1 Enlarged view of the local structure of region A in the middle;

[0030] Figure 3 for Figure 2 A schematic diagram of the exploded structure;

[0031] Figure 4 for Figure 1 Enlarged view of the local structure of region B in the middle;

[0032] Figure 5 for Figure 4 A schematic diagram of the exploded structure;

[0033] Figure 6 A cross-sectional view of the overall structure of the surgical interventional instrument provided in this embodiment of the utility model;

[0034] Figure 7 for Figure 6 Enlarged view of the local structure of region C in the middle;

[0035] Figure 8 for Figure 6 Enlarged view of the local structure of region D in the middle;

[0036] Figure 9 This is a schematic diagram of the connection structure between the joint assembly, the intervention component, and the limiting sleeve in this utility model.

[0037] Icons: 11-Interventional component; 111-Electrode body; 112-Electrode housing; 12-Sheath; 13-Handle; 14-Wire; 15-Connector end piece; 2-Flexible joint connection unit; 21-Smoking port; 3-Positioning sleeve; 4-Control joint assembly; 41-Spring; 5-Actuation joint assembly; 6-Limiting sleeve; 7-Locking assembly; 71-Inner ball; 72-Outer ball sleeve; 8-Negative pressure suction tube; 9-T-connector fitting. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0040] It should be noted that similar labels and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0041] In the description of this utility model, it should be noted that:

[0042] Unless otherwise expressly specified and limited, the terms "set," "install," and "connect" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The terms "proximal end," "distal end," "front end," "rear end," "axial," "circumferential," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model.

[0044] The terms “first”, “second”, etc. are used only for distinguishing descriptions and do not indicate totality or relative position in time and / or space, nor should they be construed as indicating or implying relative importance.

[0045] Below, some embodiments of this utility model will be described in detail with reference to the accompanying drawings, taking the end of the medical instrument closer to the surgeon during surgery as the proximal end of the medical instrument and the end of the medical instrument entering the patient's body as the distal end of the medical instrument (the front end of the medical instrument is the distal end, and the rear end of the medical instrument is the proximal end).

[0046] This embodiment provides a surgical interventional instrument, as described above. Figures 1 to 8The surgical interventional device includes an interventional component 11, a sheath 12, and a handle 13. The interventional component 11 is connected to the distal end of the sheath 12. The handle 13 is connected to the proximal end of the sheath 12 and has a loading cavity. In particular, the surgical interventional device provided in this embodiment also includes a flexible joint linkage assembly and a locking assembly 7. Specifically, the flexible joint linkage assembly includes a control joint assembly 4, an execution joint assembly 5, and at least two control lines (not shown). The control joint assembly 4 and the execution joint assembly 5 each include a multi-segment flexible joint connecting unit 2 that is hinged to each other. The control lines connect all the flexible joint connecting units 2 of the control joint assembly 4 and all the flexible joint connecting units 2 of the execution joint assembly 5 in series, so that the control joint assembly 4 and the execution joint assembly 5 form a linkage structure. The distal end of the execution joint assembly 5 is fixedly connected to the proximal end of the interventional component 11. In this way, by controlling the movement posture of the control joint assembly 4, the posture of the execution joint assembly 5 can be controlled by the pulling and releasing of the control lines, thereby controlling the bending direction and bending angle of the interventional component 11 relative to the sheath 12. The locking assembly 7 includes an inner ball 71 and an outer ball sleeve 72 that is movably sleeved outside the inner ball 71 and ball-jointed to the inner ball 71. The inner ball 71 is fixedly connected to the handle 13. The proximal end of the control joint assembly 4 extends into the loading cavity of the handle 13 and is movably disposed inside the inner ball 71. The distal end of the control joint assembly 4 is movably disposed inside the outer ball sleeve 72 and passes through the outer ball sleeve 72. Under the action of external force, the outer ball sleeve 72 can abut against and lock the inner ball 71, so that the inner ball 71 and the outer ball sleeve 72 jointly lock the movement posture of the control joint assembly 4.

[0047] In the above structure of this embodiment, the control joint assembly 4 and the execution joint assembly 5 are respectively configured as flexible joint assembly structures with multiple flexible joint connection units 2 to have the ability to bend in all directions. The proximal end of the control joint assembly 4 is movably disposed in the inner ball 71, and the distal end of the control joint assembly 4 is movably disposed in the outer ball sleeve 72. In use, the handle 13 serves as the user's (operator's) grip base, with the thumb and index finger placed in the locking assembly 7, and the remaining fingers and palm naturally gripping the handle 13. When the intervention component 11 needs to be deflected, the user adjusts the movement posture of the control joint assembly 4 with the thumb and index finger, thereby using the control line to adjust the movement posture of the execution joint assembly 5, so as to drive the position of the intervention component 11 to change accordingly. When adjusting the movement posture of the control joint assembly 4, the two ends of the control joint assembly 4 move and abut against the inner ball 71 and the outer ball sleeve 72 respectively. The outer ball sleeve 72 abuts against and locks the inner ball 71 to lock the two ends of the control joint assembly 4, thereby achieving the purpose of locking the entire control joint assembly 4, thereby correspondingly locking the execution joint assembly 5 and the intervention component 11.

[0048] Using the surgical interventional instrument provided in this embodiment, the user can flexibly adjust and control the angle of the interventional component 11, allowing the interventional component 11 to deflect in all directions and approach the lesion. The locking component 7 is used to lock the position and posture of the interventional component 11, thereby treating the lesion through the interventional component 11. For example, this invention can be applied to a high-frequency electrosurgical instrument as an interventional component 11 to apply precise electrosurgical energy to the lesion. Alternatively, other interventional components 11 can be used to treat the lesion. The surgical interventional instrument provided by this invention is flexible, convenient, stable, and reliable in operation, which helps reduce operator fatigue, improves surgical efficiency, and allows for multi-angle adjustment so that surgery can be completed without creating additional instrument access routes, thereby reducing surgical trauma to the patient and promoting postoperative recovery.

[0049] In this embodiment, at least two control lines are provided to achieve bending in at least two directions. Four or more lines can also be provided to achieve bending operations in more directions.

[0050] In addition, in an optional embodiment of this example, the flexible joint linkage assembly further includes the same number of limiting sleeves 6 as the control lines. The distal end of the control joint assembly 4 is fixedly connected to the proximal end of each limiting sleeve 6, and the proximal end of the execution joint assembly 5 is fixedly connected to the distal end of each limiting sleeve 6. The control lines are correspondingly inserted into the interior of each limiting sleeve 6 to limit the path of the control lines. This protects the control lines and prevents interference between the control lines and other structural components, thus avoiding problems such as jamming or breakage of the control lines.

[0051] Reference Figure 9 , combined Figures 1 to 8 In an optional embodiment of this example, the above-mentioned flexible joint linkage component further includes a positioning sleeve 3. The outer ball sleeve 72 is rotatably sleeved on the outside of the proximal end of the positioning sleeve 3. The distal end of the control joint component 4 is fixedly connected to the proximal end of the positioning sleeve 3. The control line passes through the inside of the positioning sleeve 3. In use, the user can fix the positioning sleeve 3 to the external frame to improve the adjustment stability.

[0052] Reference Figure 7In an optional embodiment of this example, the control joint assembly 4 further includes a spring 41. A retaining edge is provided at each of the axial ends of the control joint assembly 4. The spring 41 is located inside the multi-section flexible joint connecting unit 2 of the control joint assembly 4, and its two axial ends abut against the retaining edges at the corresponding ends. By providing the spring 41, the control joint assembly 4 can have a rotational tendency, so that the axial lengths of each control line tend to be equal after the end of surgery and before the start of surgery. During adjustment, the spring 41 can undergo elastic deformation as needed to adapt to the user's needs, making it more convenient for the user. However, it should be noted that this optional embodiment requires testing the rebound force of the spring 41 during manufacturing, with its design standard based on the function of the inner ball 71 and the outer ball sleeve 72 jointly locking the movement posture of the control joint assembly 4 after the user adjusts the angle.

[0053] In an optional embodiment of this example, depending on the type of interventional component 11, the above-mentioned surgical interventional instruments can be selected from various specific types, including but not limited to, such as Figures 1 to 8 As shown, the interventional surgical instrument is a high-frequency electrosurgical instrument that serves as the interventional component 11; as Figure 7 As shown, at this time, the high-frequency electrosurgical instrument should also include a wire 14. A wiring terminal connector 15 is installed inside the loading cavity of the handle 13, and the proximal end of the wiring terminal connector 15 protrudes outside the handle 13 for connecting an external cable. The wire 14 passes through the inner cavity of the handle 13, the sheath 12 and each flexible joint connecting unit 2, and the distal end of the wire 14 is connected to the connector, and the proximal end of the wire 14 is connected to the wiring terminal connector 15. In use, the electrosurgical host can be connected through the wiring terminal connector 15, and the electrosurgical energy can be activated by the foot switch.

[0054] When the interventional surgical instrument is a high-frequency electrosurgical instrument serving as interventional component 11, electrocoagulation generates a large amount of smoke. Failure to promptly remove the smoke can harm the operator, and the smoke under the endoscope can also interfere with the operator's vision, affecting the operation speed and positioning accuracy. Therefore, in an optional embodiment of this invention, the surgical instrument is designed to include a smoke-absorbing structure. Specifically, refer to... Figures 1 to 9 The smoking structure includes a smoking port 21 and a negative pressure suction tube 8. The smoking port 21 is located on the circumferential surface of the joint assembly 5 and communicates with the inner cavity of the flexible joint connection unit 2 of the joint assembly 5. The negative pressure suction tube 8 passes through the lumen of the sheath 12, the inner cavity of the flexible joint connection unit 2 of the joint assembly 4, and the loading channel of the handle 13, and communicates with the negative pressure suction port located on the handle 13. Thus, by connecting an external air compressor to the negative pressure suction tube 8, the smoke generated by surgical electrocoagulation can be discharged from the smoking port 21 along the negative pressure suction tube 8 to the outside of the surgical instruments, ensuring a clear endoscopic view during the operation and reducing harm to the operator.

[0055] Alternatively, the wire 14 passes through the aforementioned negative pressure suction tube 8, which is preferably a flexible hose. In this case, more preferably, as... Figure 3 As shown, a three-way connector 9 is provided in the loading channel of the handle 13; the three-way connector 9 has a proximal branch pipe interface, a distal branch pipe interface, and a side branch pipe interface; the proximal end of the negative pressure suction pipe 8 is sealed to its distal branch pipe interface; its side branch pipe interface extends from the negative pressure suction interface on the handle 13 to the outside of the handle 13; the distal end of the wiring end connector 15 is sealed to its proximal branch pipe interface, and the wire 14 passes through its distal branch pipe interface into the three-way connector 9 and connects to the wiring end connector 15. This forms a sealed passage structure to ensure the normal operation of the negative pressure suction mist function.

[0056] Optionally, multiple smoke inlets 21 are provided along both the circumferential and axial directions of the actuating joint assembly 5 to improve smoke extraction efficiency and effect. Furthermore, preferably, the smoke inlets 21 of the actuating joint assembly 5 are located in the recessed portion between two adjacent flexible joint connecting units 2. This not only increases the opening area of ​​the smoke inlets 21, further enhancing the smoke extraction function, but also further increases the bending flexibility between the two adjacent flexible joint connecting units 2, allowing for more flexible bending adjustments.

[0057] In this embodiment, the electrode includes an electrode body 111 and an electrode housing 112 that encloses the electrode body; the distal end of the wire 14 is fixedly connected to the electrode body 111, and the distal end of the actuating joint assembly 5 is sealed to the proximal end of the electrode housing 112. The specific connection method of the sealed connection between the distal end of the actuating joint assembly 5 and the proximal end of the electrode housing 112 includes a non-removable connection method (such as welding or bonding) and a detachable connection method. The detachable connection method includes, but is not limited to, snap-fit ​​connection, so that a specific type of electrode can be selected to dock with the actuating joint assembly 5 according to actual needs. The selectable types include, but are not limited to, electric hooks, electric shovels, electric rods, and other types of cutting heads or pliers.

[0058] Finally, it should be noted that the above embodiments and optional implementations in this specification are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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 optional implementations, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. In addition, it is emphasized again that, in the absence of conflict, the features of the embodiments and optional implementations in the embodiments in this specification can be combined with each other.

Claims

1. A surgical intervention instrument, comprising an intervention member, a sheath tube and a handle; the intervention member is connected to the distal end of the sheath tube; the handle is connected to the proximal end of the sheath tube, and the handle has a loading cavity; characterized in that: the surgical intervention instrument further comprises a flexible joint linkage assembly and a locking assembly; the flexible joint linkage assembly comprises a control joint assembly, an execution joint assembly and at least two control lines; the control joint assembly and the execution joint assembly each comprise a plurality of flexible joint connecting units that are hingedly connected to each other in pairs; the control lines are connected in series to all the flexible joint connecting units of the control joint assembly and all the flexible joint connecting units of the execution joint assembly; the distal end of the execution joint assembly is fixedly connected to the proximal end of the intervention member; the locking assembly comprises an inner sphere and an outer sphere sleeve movably sleeved outside the inner sphere to be hingedly connected with the inner sphere; the inner sphere is fixedly connected with the handle; the proximal end of the control joint assembly extends into the inside of the loading cavity of the handle and is movably arranged inside the inner sphere; the distal end of the control joint assembly is movably arranged inside the outer sphere sleeve and passes through the outer sphere sleeve; under the action of an external force, the outer sphere sleeve can abut and lock the inner sphere to make the inner sphere and the outer sphere sleeve jointly lock the movement posture of the control joint assembly.

2. A surgical intervention instrument according to claim 1, characterized in that the flexible joint linkage assembly further comprises a same number of limiting sleeves as the control lines; the distal end of the control joint assembly is fixedly connected with the proximal end of each limiting sleeve, and the proximal end of the execution joint assembly is fixedly connected with the distal end of each limiting sleeve; the control lines are correspondingly arranged inside each limiting sleeve.

3. The surgical intervention instrument according to claim 1, characterized in that the control joint assembly further comprises a spring, and a stopper is arranged at each axial end of the control joint assembly; the spring is arranged inside the plurality of flexible joint connecting units of the control joint assembly and abuts against the stopper at the corresponding end in the axial direction.

4. The surgical intervention instrument according to claim 1, characterized in that: the flexible joint linkage assembly further comprises a positioning sleeve; the outer sphere sleeve is rotatably sleeved outside the proximal end of the positioning sleeve; the distal end of the control joint assembly is fixedly connected with the proximal end of the positioning sleeve; and the control lines are arranged inside the positioning sleeve.

5. Surgical intervention instrument according to any one of claims 1 to 4, characterized in that the surgical intervention instrument is a high-frequency electric surgical instrument with an electrode as the intervention member; the high-frequency electric surgical instrument further comprises an electric wire; a terminal connecting piece is arranged inside the loading cavity, and the proximal end of the terminal connecting piece is exposed outside the handle for connecting an external cable; the electric wire passes through the inner cavities of the handle, the sheath tube and each flexible joint connecting unit, and the distal end of the electric wire is connected with the electrode and the proximal end of the electric wire is connected with the terminal connecting piece.

6. A surgical intervention instrument according to claim 5, characterized in that the surgical intervention instrument further comprises a smoke suction structure, which comprises: a smoke suction port arranged on the peripheral surface of the execution joint assembly and in communication with the inner cavities of the flexible joint connecting units thereof; and a negative pressure suction pipe passing through the lumen of the sheath tube, the inner cavities of the flexible joint connecting units of the control joint assembly and the loading channel of the handle and being in communication with a negative pressure suction port arranged on the handle.

7. A surgical intervention instrument according to claim 6, characterized in that: The electric wire passes through the negative pressure suction pipe; The loading channel is provided with a tee pipe fitting; the tee pipe fitting has a proximal branch pipe interface, a distal branch pipe interface and a side branch pipe interface; the proximal end of the negative pressure suction pipe is in sealed connection with the distal branch pipe interface; the side branch pipe interface extends from the negative pressure suction interface on the handle to the outside of the handle; the distal end of the wire end connecting piece is in sealed butt joint with the proximal branch pipe interface, and the electric wire passes into the tee pipe fitting from the distal branch pipe interface and is connected with the wire end connecting piece.

8. A surgical intervention instrument according to claim 6, characterized in that: The smoking port is respectively provided with a plurality of ports along the circumferential and axial directions of the execution joint assembly.

9. A surgical intervention instrument according to claim 8, characterized in that: The smoking port of the execution joint assembly is arranged at a recessed position between two adjacent flexible joint connecting units.

10. The surgical intervention instrument according to claim 5, characterized in that: The electrode comprises an electrode body and an electrode shell wrapping the electrode body; the distal end of the electric wire is fixedly connected with the electrode body, and the distal end of the execution joint assembly is detachably and sealingly connected with the proximal end of the electrode shell.

Images