WO2023116662A1

WO2023116662A1 - Protective sleeve, surgical instrument, and surgical instrument assembly

Info

Publication number: WO2023116662A1
Application number: PCT/CN2022/140264
Authority: WO
Inventors: 陈晓; 朱国征; 张京田; 蒋友坤
Original assignee: 上海微创医疗机器人（集团）股份有限公司
Priority date: 2021-12-21
Filing date: 2022-12-20
Publication date: 2023-06-29
Also published as: CN114288026A

Abstract

A protective sleeve (10), a surgical instrument (20), and a surgical instrument assembly. The protective sleeve (10) has a first end (101) and a second end (102) opposite to each other in the axial direction of the protective sleeve; the protective sleeve (10) is configured to be sleeved on the surgical instrument (20) and to enable an execution part (21) at a distal end of the surgical instrument (20) to extend out from the first end (101); the periphery of the protective sleeve (10) has a step area (11) and a main body area (12) adjacent to each other; the step area (11) is located at the second end (102) of the protective sleeve (10); a height difference is formed between the step area (11) and the main body area (12) in the radial direction of the protective sleeve (10), wherein the step area (11) is lower than the main body area (12) in the radial direction, and at least part of the step area (11) is configured to be inserted into a sleeve (24) of the surgical instrument (20). According to such a configuration, friction between the second end (102) of the protective sleeve (10) and the inner wall of a puncture device (30) can be avoided by inserting the step area (11) at the second end (102) of the protective sleeve (10) into the sleeve (24) of the surgical instrument (20), such that the risk of the protective sleeve (10) falling off from the puncture device (30) can be reduced.

Description

Protective sheath, surgical instrument and surgical instrument combination

technical field

The present application relates to the technical field of medical devices, in particular to a protective cover, a surgical device and a surgical device assembly.

Background technique

In the surgical robot-assisted laparoscopic surgery system, various electrosurgical instruments with high-frequency alternating current are usually used. When these high-frequency AC electrosurgical units are used in the body, an insulating protective sheath is required to isolate the tissue and the surgical instrument to protect the tissue from electric injury. At present, the insulating protective sheath is a consumable, and medical personnel need to install it on the surgical instrument (such as an electric knife) before the operation. Due to the different proficiency and training effects of medical personnel, there is a risk of incorrect installation of the insulating protective sheath, which in turn causes the risk of falling off when passing through the trocar in the body. Once the insulating protective sheath falls off in the body or in the puncture device, the medical staff must remove the insulating protective sheath from the body to the outside, and need to pull out the surgical instrument and reinstall the insulating protective sheath, which reduces the safety of the operation and hinders the operation. The progress of the surgery.

Contents of the invention

The purpose of the present application is to provide a protective cover, a surgical instrument and a surgical instrument assembly, so as to solve the problem that the insulating protective cover of the existing surgical instrument is easily installed incorrectly and easily falls off.

In order to solve the above technical problems, the first aspect of the present application provides a protective sleeve, the protective sleeve has a first end and a second end opposite to the axial direction thereof, and the protective sleeve is used to be sleeved on a surgical instrument, and protruding the implementing portion at the distal end of the surgical instrument from the first end;

The outer periphery of the protective cover has a contiguous step area and a main body area, the step area is located at the second end of the protective cover, the step area and the main body area form a height in the radial direction of the protective cover Poor, wherein the stepped region is radially lower than the body region, at least a portion of the stepped region for insertion into a cannula of the surgical instrument.

Optionally, in the protective sleeve, the radially inner dimension of the opening of the protective sleeve at the first end is smaller than the radially inner dimension of the opening of the protective sleeve at the second end.

Optionally, in the protective cover, at least the main body area is made of a first material, and the protective cover further includes a cylindrical reinforcing body, the reinforcing body is made of a second material, and the reinforcing body Constituting at least part of the step region; the second material having a modulus of elasticity greater than that of the first material.

Optionally, in the protective cover, a part of the reinforcing body also extends into the main body area toward the first end, and is connected to the inner side of the main body area.

Optionally, in the protective cover, the stepped area and/or the main body area corresponding to the reinforcing body forms a recessed area radially outward, and the reinforcing body is connected to the recessed area, And the thickness of the reinforcing body along the radial direction is adapted to the depth of the recessed area along the radial direction.

Optionally, the protective cover includes a positioning hole, and the positioning hole is opened on the main body area along the radial direction of the protective cover; the positioning hole is used to fit the positioning protrusion of the surgical instrument With the snap.

Optionally, in the protective cover, the width of the positioning hole gradually increases along the direction from the first end toward the second end; wherein the width of the positioning hole is that the positioning hole is Set the inner dimension of the circumference.

Optionally, in the protective sleeve, the stepped area has an external thread, or the stepped area is extruded by the sleeve to form an external thread after being connected with the sleeve; the stepped area passes through the The external thread is connected with the internal thread of the casing.

Optionally, in the protective cover, the main body area includes a bevel section, and the bevel section is located on a side of the main body area close to the second end; the bevel section faces the second end Gradually shrinking, so that the main body area and the step area form a transition connection.

Optionally, in the protective cover, the outer surface of the main body area has a concave or convex anti-slip structure.

In order to solve the above technical problems, the second aspect of the present application provides a surgical instrument, which is used for mating connection with the above-mentioned protective sleeve; the surgical instrument includes an executive part, an insulating A segment and an instrument shaft, the surgical instrument also includes a sleeve, the sleeve is arranged at the distal end of the instrument shaft; the execution part is used to protrude from the first end of the protective sleeve, the The sleeve is used to cover at least part of the step area.

Optionally, in the surgical instrument, the sleeve has an internal thread, and the sleeve is connected to the external thread of the step area through the internal thread.

Optionally, in the surgical instrument, the cannula is movable relative to the instrument shaft along the axial direction of the instrument shaft, and after the cannula moves and protrudes toward the distal end in the axial direction, it is sleeved on the At least part of the step area.

Optionally, the surgical instrument further includes an outer tube, the outer tube is sheathed outside the instrument shaft and fixedly connected to the instrument shaft, at least part of the sleeve is passed through the outer tube, and The sleeve is movably connected to the outer tube.

Optionally, in the surgical instrument, the outer tube has a long hole radially penetrated, and the long axis of the long hole is arranged along the axial direction of the instrument shaft; the sleeve has a A radially protruding slider, the width of the slider along the axis perpendicular to the instrument shaft is adapted to the width of the elongated hole perpendicular to the axis of the instrument shaft, and the slider along the axis of the instrument The axial direction of the instrument rod is movably arranged in the elongated hole.

Optionally, the surgical instrument includes a positioning protrusion, and the positioning protrusion is disposed on the insulating segment, and is adapted to engage with the positioning hole of the protective sheath.

In order to solve the above technical problems, a third aspect of the present application provides a surgical instrument assembly, which includes the above-mentioned protective sheath and the above-mentioned surgical instrument.

To sum up, in the protective sheath, surgical instrument and surgical instrument combination provided by the present application, the protective sheath has opposite first and second ends along its own axial direction, and the protective sheath is used to be sleeved on the surgical instrument. on the instrument, and make the executive part of the distal end of the surgical instrument protrude from the first end; the outer periphery of the protective cover has a contiguous step area and a main body area, and the step area is located on the protective cover At the second end, the step area and the main body area form a height difference in the radial direction of the protective sleeve, wherein the step area is lower than the main body area in the radial direction, and at least part of the step area is used for insertion Inside the cannula of the surgical instrument.

With such a configuration, by inserting the step region at the second end of the protective sheath into the cannula of the surgical instrument, friction between the second end of the protective sheath and the inner wall of the trocar can be avoided, thereby reducing the risk of the protective sheath falling off in the trocar.

Description of drawings

Those of ordinary skill in the art will understand that the provided drawings are for better understanding of the present application, and do not constitute any limitation to the scope of the present application. in:

Fig. 1a is a schematic view before the surgical instrument and the protective cover of the embodiment of the present application are assembled;

Fig. 1b is a schematic diagram of the assembly of the surgical instrument and the protective cover according to the embodiment of the present application;

Fig. 1c is a schematic diagram of the assembled surgical instrument and protective cover according to the embodiment of the present application;

Fig. 2 is the schematic diagram of the surgical instrument of the embodiment of the present application;

Fig. 3a is a schematic diagram of the protective cover of the embodiment of the present application;

Fig. 3b is a schematic diagram of the axial section of the protective sleeve of the embodiment of the present application;

Fig. 4a is a schematic diagram of the surgical instrument assembly according to the embodiment of the present application before being installed into the trocar;

Fig. 4b is a schematic diagram of installing the surgical instrument assembly in the trocar according to the embodiment of the present application;

Fig. 4c is a schematic diagram of the surgical instrument assembly of the embodiment of the present application after being installed into the trocar;

Fig. 5 a is the installation flowchart of the surgical instrument of the embodiment of the present application;

Fig. 5b is a disassembly flowchart of the surgical instrument of the embodiment of the present application;

Fig. 6a is an axial cross-sectional view of the protective sleeve of the embodiment of the present application, which shows an exploded view of the reinforcing body and the recessed area;

Fig. 6b is a schematic diagram of the reinforcing body of the embodiment of the present application;

Fig. 6c is an axial cross-sectional view of the protective sleeve of the embodiment of the present application, which shows a schematic view of the reinforcement body and the recessed area after installation;

Fig. 6d is an axial cross-sectional view of the protective sleeve of the embodiment of the present application;

Fig. 7a is a schematic view before the protective sheath of the embodiment of the present application is screwed into the surgical instrument;

Fig. 7b is a schematic diagram of the protective sheath of the embodiment of the present application after being screwed into the surgical instrument;

Fig. 7c is a schematic diagram of the groove section of the protective sleeve of the embodiment of the present application;

Fig. 8a is a schematic diagram of the cannula according to the embodiment of the present application before extending to the distal end;

Fig. 8b is a schematic diagram of the cannula of the embodiment of the present application after it is stretched out to the distal end;

Fig. 8c is a schematic diagram of the casing and the outer tube of the embodiment of the present application;

Fig. 9a is a schematic diagram of a casing with a positioning hole according to an embodiment of the present application;

Fig. 9b is a schematic diagram of a surgical instrument with a positioning protrusion according to an embodiment of the present application;

Fig. 9c is a schematic diagram of the fit and engagement of the positioning hole and the positioning protrusion in the embodiment of the present application;

Fig. 10a is a schematic diagram of another example of a sleeve with a positioning hole according to an embodiment of the present application;

Fig. 10b is a schematic diagram of another example of a surgical instrument with a positioning protrusion according to an embodiment of the present application;

Fig. 10c is a schematic diagram of another example of the fit and engagement of the positioning hole and the positioning protrusion in the embodiment of the present application;

11a to 11c are schematic diagrams of the anti-skid structure of the embodiment of the present application.

In the attached picture:

10-protective sleeve; 101-first end; 102-second end; 11-step area; 111-external thread; 12-main body area; 121-straight section; 124-anti-slip structure; 13-reinforcing body; 14-depressed area; 15-positioning hole;

20-surgical instrument; 21-executive part; 22-insulation section; 23-instrument rod; 24-sleeve; 241-slider; 25-outer tube; 251-long hole;

30 - Trocar.

Detailed ways

In order to make the purpose, advantages and features of the application clearer, the application will be further described in detail below in conjunction with the drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and not drawn to scale, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present application. In addition, the structures shown in the drawings are often a part of the actual structures. In particular, each drawing needs to display different emphases, and sometimes uses different scales.

As used in this application, the singular forms "a", "an" and "the" include plural objects, the term "or" is generally used in the sense of including "and/or", and the term "several" Usually, the term "at least one" is used in the meaning of "at least one", and the term "at least two" is usually used in the meaning of "two or more". In addition, the terms "first", "second "Two" and "third" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first", "second", and "third" may expressly or implicitly include one or at least two of these features, "one end" and "another end" and "near end" and "near end" "Distal end" generally refers to the corresponding two parts, and it includes not only the endpoint. The terms "proximal" and "distal" are defined herein with respect to a surgical robotic system having an interface configured to mechanically and electrically couple surgical instruments to a manipulator of the surgical robot. The term "proximal" refers to the position of the element closer to the manipulator of the surgical robot, and the term "distal" refers to the position of the element closer to the surgical instrument and thus further away from the manipulator of the surgical robot. Optionally, in a manual or hand-operated application scenario, the terms "proximal" and "distal" are defined herein with respect to an operator such as a surgeon or a clinician. The term "proximal" refers to the position of the element closer to the operator, and the term "distal" refers to the position of the element closer to the surgical instrument and thus farther from the operator. In addition, as used in this application, "mounting", "connecting", "connecting", and one element being "disposed" on another element should be interpreted in a broad sense and usually only mean that there is connection, coupling, Fitting or transmission relationship, and the connection, coupling, cooperation or transmission between two elements may be direct or indirect through intermediate elements, but shall not be understood as indicating or implying a spatial positional relationship between two elements, that is, one element may be in another Any orientation of the inside, outside, top, bottom, or side of an element, unless the content clearly indicates otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations. Furthermore, directional terms such as above, below, up, down, up, down, left, right, etc. are used with respect to the exemplary embodiments as they are shown in the figures, with an upward or upward direction toward the top of the corresponding figure, The downward or downward direction is towards the bottom of the corresponding drawing.

Description is made below with reference to the accompanying drawings.

This embodiment provides a surgical instrument combination, which is formed by assembling a protective sheath 10 and a surgical instrument 20 . 1a to 1c show the process of assembling and connecting the protective sheath 10 and the surgical instrument 20 to form a surgical instrument combination.

Please refer to FIG. 2 , in one embodiment, the surgical instrument 20 includes an executing part 21, an insulating section 22 and an instrument shaft connected in sequence from the distal end (the right end in FIG. 2 ) to the proximal end (the left end in FIG. 2 ). twenty three. The execution part 21 is mainly used to perform surgical operations, such as cutting, cutting, etc. In an alternative embodiment, the execution part 21 communicates with The driving device (not shown) at the proximal end is connected, and driven by the driving device, the driving wire drives the actuator 21 to realize actions such as pitching, yaw, or opening and closing. Further, the executive part 21 can also be connected to the proximal energy supply end through the wires passing through the insulating section 22 and the instrument shaft 23, and then, for example, high-frequency discharge can be implemented to separate and coagulate the body tissue, thereby causing For the purpose of cutting and hemostasis. Since metal parts of the surgical instrument 20 other than the execution part 21 may cause unnecessary burns when in contact with the patient, or even cause additional danger, it is possible to use as few exposed metal parts as possible outside the execution part 21 . In one example, the execution part 21 needs to realize functions such as pitching, yawing, opening and closing, and electric shearing, so its metal parts are exposed, and the insulating section 22 connected to the proximal end of the execution part 21 does not need to pitch or yaw (in some embodiments it can rotate around its axis), so it is preferable that the insulating segment 22 adopts a fixed structure and is made of insulating material. The structure of the insulating section 22 serves as the first barrier for the insulation protection of the electrosurgical instrument, and excellent insulating materials can resist a part of the voltage. Furthermore, at least the outer surface of the instrument shaft 23 is also made of insulating material. In this way, the protective sheath 10 needs to protect the parts of the actuator 21 except the end that needs to be in direct contact with the patient, so as to form a complete electrical isolation protection.

Please refer to FIG. 3 a and FIG. 3 b , in one embodiment, the protective sheath 10 has a first end 101 and a second end 102 opposite to each other along its axial direction. Please refer to FIG. 1a to FIG. 1c , in use, the protective sheath 10 is sheathed to the distal end of the surgical instrument 20 along the direction from the second end 102 to the first end 101 , to the first end of the protective sheath 10 from the implementing part 21 101 is stretched out, and the assembly can be completed to form a surgical instrument assembly.

Further, referring to Fig. 4a to Fig. 4c, after completing the assembly of the surgical instrument assembly, the next step in the surgical operation is to insert the surgical instrument assembly into the trocar 30, and then install the surgical instrument to the power box (not shown in the figure). As shown), the power box is connected to the driving device. For the specific installation process, please refer to Figure 5a. Contrary to the installation process, after the operation, the surgical instrument assembly can be withdrawn from the trocar 30, and then the protective cover 10 can be disassembled. Please refer to FIG. 5b for the specific disassembly process. It should be noted that the trocar 30 , the power box and the driving device can all be configured according to the prior art, and those skilled in the art can understand its structure and principle based on the prior art, and the description of this embodiment will not be repeated here.

Since in some embodiments, the actuator 21 needs to realize functions such as pitch, yaw, opening and closing, and electric shearing, the protective cover 10 not only needs to have excellent insulation performance, but also needs to be soft enough to match the movement joints of the actuator 21. sports. However, as described in the background art, if no special measures are taken, the soft protective sheath 10 will easily slip off axially toward the distal end during use, and fall out of the trocar 30 or fall into the patient's body during the operation. In particular, the inventor found that when the protective sheath 10 moves in the trocar, the second end 102 of the protective sheath 10 tends to rub against the inner wall of the trocar 30 , which is a major cause of the protective sheath 10 falling off.

Based on this, please refer to FIG. 3a and FIG. 3b. The protective cover 10 provided in this embodiment has an adjacent stepped area 11 and a main body area 12, the stepped area 11 is located at the second end 102, and the stepped area 11 and the main body area 12 The main body area 12 forms a height difference in the radial direction of the protective cover 10 , wherein the step area 11 is lower than the main body area 12 in the radial direction. Compatible, please refer to FIG. 2, the surgical instrument 20 also includes a sleeve 24, the sleeve 24 is arranged at the distal end of the instrument rod 23; the sleeve 24 is used to be sleeved on the step At least part of the zone 11 , ie at least part of the stepped zone 11 is intended to be inserted into the sleeve 24 of the surgical instrument 20 to be at least partially covered by the sleeve 24 . In such a configuration, the second end 102 of the protective sheath 10 is covered by the sleeve 24 of the surgical instrument 20, which can prevent the second end 102 of the protective sheath 10 from rubbing against the inner wall of the trocar 30, thereby reducing the protective sheath 10 to the trocar 30. Risk of falling off within 30.

Please continue to refer to FIG. 3a and FIG. 3b. In an example, the radial inner dimension of the opening of the protective sheath 10 at the first end 101 is smaller than that of the protective sheath 10 at the second end 102. The radial inner dimension of the opening. The protective cover 10 is substantially cylindrical, and both ends are opened to have openings. Preferably, the opening can be circular. Of course, in some other embodiments, the opening may also be in the shape of a polygon, which is not limited in this embodiment. It should be noted that the radial inner dimension of the opening of the protective cover 10 refers to the inner width of the opening along the radial direction. If the opening is circular, its radial inner dimension is the diameter of the circle. If the opening is polygonal, its radial inner dimension is the diameter of the inscribed circle of the polygon. Since the size of the implementing part 21 of the surgical instrument 20 generally narrows toward the distal end, the radially inner dimension of the opening at the first end 101 is set to be smaller, which is beneficial to adapt to the outer contour shape of the implementing part 21 . Optionally, the main body region 12 includes a straight section 121 and a constricted section 122 connected in sequence from the proximal end to the distal end. Constricted frustum.

Please refer to FIG. 6a to FIG. 6d , optionally, at least the main body area 12 is made of a first material, and the protective cover further includes a cylindrical reinforcing body 13, and the reinforcing body 13 is made of a second material, The reinforcing body 13 constitutes at least part of the step region 11; the modulus of elasticity of the second material is greater than that of the first material.

In some embodiments, the stepped area 11 is entirely composed of the reinforcing body 13 , and a part of the reinforcing body 13 also extends into the main body area 12 towards the direction of the first end 101 and connects with the inner side of the main body area 12 . In some other embodiments, the outside of the reinforcing body 13 may also wrap part of the first material, that is, the reinforcing body 13 constitutes the inner part of the step area 11 , and the reinforcing body 13 is combined with the first material, for example, by encapsulation. In some other embodiments, the reinforcing body 13 may only constitute a part of the axial section of the stepped region 11 instead of extending to form the entire stepped region 11 , and the rest of the stepped region 11 may be formed by filling the first material.

In practice, since the executive part 21 near the distal end of the surgical instrument 20 is a conductor made of metal material and needs to move, the material of the main body area 12 should have good insulation performance and tear resistance, such as silicone or For rubber, the modulus of elasticity is preferably less than 100 MPa. Further, please refer to FIG. 6d , the wall thickness of the side of the protective sheath 10 close to the first end 101 can be set larger to improve its insulation. Since the side of the protective sheath 10 close to the second end 102 is mainly sheathed on the insulating section 22 , the requirements for insulation performance and tear resistance are lower, and the wall thickness can be set smaller. However, the protective sheath 10 is mainly connected to the surgical instrument 20 through the side near the second end 102 , so the side near the second end 102 needs to be able to resist deformation. Therefore, through the arrangement of the reinforcing body 13, the requirement of anti-deformation can be better met. For example, the reinforcement body 13 can be made of a material with a relatively high elastic modulus, such as hard plastic (such as nylon, polytetrafluoroethylene), and its elastic modulus is preferably greater than 1 GPa.

Preferably, the area of the step area 11 and/or the main body area 12 corresponding to the reinforcing body 13 forms a recessed area 14 radially outward, the reinforcing body 13 is connected to the recessed area 14, and the reinforcing body 13 is connected to the recessed area 14, and the reinforcing body The thickness of the body 13 along the radial direction is adapted to the depth of the recessed area 14 along the radial direction, so that after the reinforcing body 13 is installed in the recessed area 14, the inner wall of the reinforcing body 13 and the rest of the stepped area 11 and/or the main body area 12 Part of the inner wall remains flat, which is convenient for installation on the surgical instrument 20 . It can be understood that, in some embodiments, if the stepped area 11 is only composed of the reinforcing body 13, then the recessed area 14 is only formed in the main body area 12 at this time, and a part of the reinforcing body 13 is embedded in the recessed area 14 of the main body area 12, and the other part It protrudes towards the direction of the first end 101 to form a stepped area 11 . In some other embodiments, the stepped area 11 also includes an inner and outer layer structure, the outer layer is the encapsulation of the first material, and a recessed area 14 is formed inside, and the reinforcing body 13 is disposed in the recessed area 14 . Of course, in some other embodiments, the recessed area 14 may exist in the step area 11 and the main body area 12 at the same time.

In a simple embodiment, the sleeve 24 is fixed on the instrument shaft 23 and stretches out to the insulating section 22 for a certain distance, and the protective cover 10 moves toward the proximal end of the surgical instrument 20 until the step area 11 is inserted into the sleeve 24. Can. Please refer to FIG. 7a and FIG. 7b. In an alternative example, the sleeve 24 has an internal thread, and the stepped area 11 has an external thread 111, or, the stepped area 11 is in contact with the sleeve 24 After being connected, it is extruded by the sleeve 24 to form an external thread 111 ; the stepped area 11 is connected to the internal thread of the sleeve 24 through the external thread 111 . In some embodiments, the stepped area 11 can be formed by a reinforcing body 13 , and an external thread 111 can be directly provided on the outer surface thereof. In some other embodiments, the step area 11 can be formed by encapsulating the first material on the outside of the reinforcing body 13, at this time, its outer surface is relatively soft, and the external thread can also be formed under the extrusion of the internal thread of the sleeve 24. 111 to realize the threaded connection of the two. After the sleeve 24 is screwed to the step area 11 , the sleeve 24 covers the end surface of the second end 102 of the protective sleeve 10 , so as to protect the end surface of the second end 102 of the protective sleeve 10 . After the protective cover 10 is installed on the insulating section 22 of the surgical instrument 24, the sleeve 24 is rotated, and the internal thread of the sleeve 24 is screwed on the internal thread of the step area 11, on the one hand, the second end 102 of the protective cover 10 is isolated from the The piercer 30 reduces friction, and on the other hand, fixes the axial position of the protective sheath 10 to avoid slipping, thus playing a double protective role. Optionally, in some embodiments, the sleeve 24 is rotatably arranged relative to the instrument shaft 23 , so that the protective sheath 10 only needs to be inserted in the axial direction, and the sleeve 24 can be rotated to thread the two. In other embodiments, the sleeve 24 can also be fixedly connected to the instrument shaft 23, so that after inserting the protective sleeve 10 in the axial direction, and then rotating the protective sleeve 10, the connection between the sleeve 24 and the protective sleeve 10 can also be realized. threaded connection.

Please refer to FIG. 7c, optionally, the main body area 12 includes a bevel section 123, and the bevel section 123 is located on a side of the main body area 12 close to the second end 102; the bevel section 123 faces The second end 102 shrinks gradually so that the main body area 12 forms a transition connection with the step area 11 . The side of the groove section 123 close to the first end 101 can be flush with the rest of the main body region 12, and then the groove section 123 gradually shrinks inward along the direction toward the second end 102 (that is, the outer diameter gradually decreases), To the connection with the stepped area 11 , the outer diameter of the bevel section 123 is substantially the same as the outer diameter of the stepped area 11 . This forms the transition connection. It should be noted that the transition connection here can be a straight slope connection, that is, the groove section 123 shrinks linearly, or a smooth transition connection (the groove section 123 shrinks nonlinearly). unlimited.

In some embodiments, not only the stepped area 11 can completely enter the coverage of the casing 24 , but also a part of the bevel section 123 near the second end 102 can enter the coverage of the casing 24 . In some embodiments, the groove section 123 can be used as an indicator mark for the insertion depth. Specifically, in use, when the protective sheath 10 is inserted into the surgical instrument 20, there is a reasonable relative axial position with the surgical instrument 20 . For example, in the example shown in Fig. 1b and Fig. 1c, when the side of the main body region 12 close to the second end 102 is flush with the proximal end of the insulating section 22, it can be considered that the sheath of the protective sheath 10 is in place, which is called protection at this time. The position of the sleeve 10 is a predetermined position. If the protective sheath 10 is insufficiently inserted (meaning that the protective sheath 10 is closer to the distal end of the surgical instrument 20 relative to the predetermined position), the protective sheath 10 will easily fall off on the one hand, and on the other hand, the protective sheath 10 will over-shield the executive part 21, causing the executive part 21 does not work. If the protective sheath 10 is inserted too deeply (meaning that the protective sheath 10 is relatively close to the proximal end of the surgical instrument 20), the protective sheath 10 will not cover the executive part 21 enough, and it is easy to expose a part of the executive part 21 that should not be exposed. harm. The arrangement of the bevel section 123 enables the operator to visually observe the relative positional relationship between the edge of the main body area 12 and the surgical instrument 20 , thereby avoiding insufficient or too deep insertion of the protective sheath 10 . In particular, in the scheme where the sleeve pipe 24 and the protective sleeve 10 are threaded, since the relative movement of the sleeve pipe 24 and the protective sleeve 10 when the sleeve pipe 24 and the protective sleeve 10 are rotated relative to the axial direction is relatively small, it is not easy to intuitively know the connection between the sleeve pipe 24 and the protective sleeve 10. The relative positional relationship between the protective sheath 10 , and the setting of the bevel section 123 indicates the relative positional relationship between the sleeve 24 and the protective sheath 10 . On the other hand, the arrangement of the bevel section 123 can also mechanically limit the relative positional relationship between the sleeve 24 and the protective sheath 10 . Specifically, the outer diameter of the groove section 123 near the second end 102 is smaller, and it is configured to be able to enter the distal end of the casing 24, while the outer diameter of the groove section 123 near the first end 101 is larger , which cannot enter the distal end of the cannula 24 . When the sleeve tube 24 (or protective cover 10) is continuously rotated to make the protective cover 10 move towards the proximal end of the surgical instrument 20, after a part of the groove section 123 enters the sleeve tube 24, the groove section 123 will be stuck in the sleeve tube. 24 is mechanically limited. This ensures that the protective sheath 10 cannot be inserted too deeply.

Please refer to FIGS. 8a to 8c. In another example, the sleeve 24 is movable relative to the instrument shaft 23 along the axial direction of the instrument shaft 23, and the sleeve 24 moves toward the distal end in the axial direction. After stretching out, it is sleeved on at least part of the step area 11 . Different from the previous example, the external thread 111 may not be provided on the step area 11. By improving the sleeve 24 on the surgical instrument 20, specifically configuring the sleeve 24 to move and protrude in the axial direction, it is also possible to The effect of isolating the second end 102 of the protective sheath 10 from the trocar 30 is realized.

Further, the surgical instrument 20 also includes an outer tube 25, the outer tube 25 is sheathed outside the instrument shaft 23 and fixedly connected with the instrument shaft 23, at least part of the sleeve 24 is passed through the The outer tube 25 is inside, and the sleeve 24 is movably connected with the outer tube 25 . Preferably, the instrument shaft 23 is recessed inwardly at the section where the outer tube 25 is provided. After the outer tube 25 is sleeved on the instrument shaft 23, the outer wall of the outer tube 25 is preferably flush with the outer walls of the rest of the instrument shaft 23. , to reduce the resistance through the piercer 30.

Furthermore, the outer tube 25 has a long hole 251 extending radially, the long axis of the long hole 251 is arranged along the axial direction of the instrument shaft 23; The raised slider 241, the width of the slider 241 along the axial direction perpendicular to the instrument shaft 23 is adapted to the width of the elongated hole 251 along the axial direction perpendicular to the instrument shaft 23, the slider The block 241 is movably disposed in the elongated hole 251 along the axial direction of the instrument shaft 23 . Since the outer surface of the stepped area 11 in some embodiments is made of a flexible first material with a relatively large surface friction coefficient, if the moving direction of the sleeve 24 is inclined relative to the outer surface of the stepped area 11, it is difficult to drive the sleeve 24 smoothly. The ground is sleeved on the step area 11 and is easily stuck. The arrangement of the elongated hole 251 and the slider 241 limits the movement of the slider 241 only along the long axis direction of the elongated hole 251 (that is, the axial direction of the instrument rod 23), thereby ensuring that the sleeve pipe 24 does not stretch out from the outer tube 25. There will be problems such as inclination and deflection, so as to ensure that the sleeve 24 can be smoothly sleeved on the step area 11 . In addition, the slider 241 can also be toggled by the operator, which is convenient for operation.

Please refer to FIG. 9a to FIG. 9c, preferably, the protective sheath 10 includes a positioning hole 15, and the positioning hole 15 is opened on the main body area 12 along the radial direction of the protective sheath 10; the surgical instrument 20 A positioning protrusion 26 is included, and the positioning protrusion 26 is arranged on the insulating segment 22 . The positioning hole 15 fits and engages with the positioning protrusion 26 of the surgical instrument 20 , so as to limit the relative position of the protective cover 10 and the surgical instrument 20 and prevent the protective cover 10 from falling off. Since the positioning protrusions 26 are disposed on the insulating section 22 , the positioning holes 15 provided in the corresponding positions of the protective sheath 10 will not affect the insulation of the operating part 21 at the distal end of the surgical instrument 20 . It should be noted that the present embodiment does not specifically limit the shape and quantity of the positioning holes 15. The positioning holes 15 can be several oval, circular or special-shaped holes, and the shape and quantity of the positioning protrusions 26 are the same as those of the positioning holes 15. match.

Please refer to Fig. 10a to Fig. 10c, in another preferred example, the width of the positioning hole 15 gradually increases along the direction of the first end 101 toward the second end 102; wherein the width of the positioning hole 15 is the inner dimension of the positioning hole 15 along the circumference of the protective sleeve 10 . Adaptively, the width of the positioning protrusion 26 gradually increases along the direction from the distal end to the proximal end, wherein the width of the positioning protrusion 26 is the outer dimension of the positioning protrusion 26 along the circumferential direction of the insulating tube 22 . Such configuration, on the one hand, helps to reduce the installation resistance of the protective sheath 10 , and on the other hand, can effectively prevent the protective sheath 10 from falling off after the protective sheath 10 is installed on the surgical instrument 20 .

Please refer to FIG. 11a to FIG. 11c , optionally, the outer surface of the main body area 120 has a concave or convex anti-slip structure 124 . The anti-skid structure 124 can be oval, circular, square, rhombus, arc or wavy, etc., and can be recessed on the outer surface of the main body area 120 or protruded on the outer surface of the main body area 120 . FIG. 11 a shows an oval anti-slip structure 124 , FIG. 11 b shows a diamond-shaped anti-slip structure 124 , and FIG. 11 c shows a wave-shaped anti-slip structure 124 . In some embodiments, the concave and convex anti-slip structures 124 can also be provided at the same time, and in other embodiments, various shapes of anti-slip structures 124 can also be used in combination, which is not limited in this embodiment. The setting of the anti-slip structure 124 is convenient for the operator to hold and install the protective cover 10, and can prevent the fingers or installation tools from slipping during the installation process, improve the installation efficiency of the protective cover 10, and reduce the risk of the hand poking into the end of the surgical instrument 20. risk.

To sum up, in the protective sheath, surgical instrument and surgical instrument combination provided by the present application, the protective sheath has opposite first and second ends along its own axial direction, and the protective sheath is used to be sleeved on the surgical instrument. on the instrument, and make the executive part of the distal end of the surgical instrument protrude from the first end; the outer periphery of the protective cover has a contiguous step area and a main body area, and the step area is located on the protective cover At the second end, the step area and the main body area form a height difference in the radial direction of the protective sleeve, wherein the step area is lower than the main body area in the radial direction, and at least part of the step area is used for insertion Inside the cannula of the surgical instrument. With such a configuration, by inserting the step region at the second end of the protective sheath into the cannula of the surgical instrument, friction between the second end of the protective sheath and the inner wall of the trocar can be avoided, thereby reducing the risk of the protective sheath falling off in the trocar.

It should be noted that the above several embodiments can be combined with each other. The above description is only a description of the preferred embodiments of the present application, and does not limit the scope of the present application. Any changes and modifications made by those of ordinary skill in the field of the present application based on the above disclosure shall fall within the protection scope of the claims.

Claims

A protective sheath, characterized in that the protective sheath has opposite first ends and second ends along its axial direction, the protective sheath is used to be sleeved on the surgical instrument, and enables the execution of the distal end of the surgical instrument protruding from the first end;

The outer periphery of the protective cover has a contiguous step area and a main body area, the step area is located at the second end of the protective cover, the step area and the main body area form a height in the radial direction of the protective cover Poor, wherein the stepped region is radially lower than the body region, at least a portion of the stepped region for insertion into a cannula of the surgical instrument.
The protective cover according to claim 1, wherein the radial inner dimension of the opening of the protective cover at the first end is smaller than the radial inner dimension of the opening of the protective cover at the second end. size.
The protective case according to claim 1, wherein at least the main body area is made of a first material, and the protective case further comprises a cylindrical reinforcing body, and the reinforcing body is made of a second material, so that The reinforcing body constitutes at least part of the step region; the elastic modulus of the second material is greater than the elastic modulus of the first material.
The protective cover according to claim 3, wherein a part of the reinforcing body also extends into the main body area toward the direction of the first end, and is connected to the inner side of the main body area.
The protective cover according to claim 3, characterized in that, the stepped area and/or the main body area corresponding to the reinforcement body forms a concave area radially outward, and the reinforcement body and the depression The area is connected, and the thickness of the reinforcing body along the radial direction is adapted to the depth of the recessed area along the radial direction.
The protective cover according to claim 1, wherein the protective cover includes a positioning hole, and the positioning hole is opened on the main body area along the radial direction of the protective cover; the positioning hole is used to communicate with The positioning protrusions of the surgical instruments are matched and engaged.
The protective cover according to claim 6, wherein the width of the positioning hole increases gradually along the direction from the first end toward the second end; wherein the width of the positioning hole is that along the direction of the positioning hole The inner dimension of the protective sleeve in the circumferential direction.
The protective sleeve according to claim 1, characterized in that, the step area has an external thread, or the step area is extruded by the sleeve to form an external thread after being connected with the sleeve; the step The zone is connected with the inner thread of the sleeve through the outer thread.
The protective cover according to claim 8, wherein the main body area includes a bevel section, and the bevel section is located on a side of the main body area close to the second end; the bevel section faces the The second end tapers gradually so that the main body area and the step area form a transition connection.
The protective cover according to claim 1, wherein the outer surface of the main body area has a concave or convex anti-slip structure.
A surgical instrument, characterized in that it is used for mating connection with the protective sheath according to any one of claims 1 to 10; the surgical instrument includes an executive part, an insulating section and an The instrument rod, the surgical instrument also includes a sleeve, the sleeve is arranged at the distal end of the instrument rod; the execution part is used to protrude from the first end of the protective sleeve, and the sleeve is used for It is sleeved on at least part of the step area.
The surgical instrument according to claim 11, wherein the sleeve has an internal thread, and the sleeve is connected to the external thread of the step area through the internal thread.
The surgical instrument according to claim 11, wherein the sleeve is movable relative to the instrument shaft along the axial direction of the instrument shaft, and after the sleeve moves toward the distal end in the axial direction, the sleeve at least part of the step area.
The surgical instrument according to claim 13, characterized in that, the surgical instrument further comprises an outer tube, the outer tube is sheathed outside the instrument shaft and fixedly connected with the instrument shaft, at least A part is passed through the outer tube, and the sleeve is movably connected with the outer tube.
The surgical instrument according to claim 14, characterized in that, the outer tube has a long hole radially penetrated, and the long axis of the long hole is arranged along the axial direction of the instrument shaft; the sleeve The tube has a slider protruding radially, the width of the slider along the axis perpendicular to the instrument shaft is adapted to the width of the elongated hole perpendicular to the axis of the instrument shaft, and the slider A block is movably disposed in the elongated hole along the axial direction of the instrument shaft.
The surgical instrument according to claim 11, characterized in that, the surgical instrument comprises a positioning protrusion, and the positioning protrusion is disposed on the insulating section, and is adapted to fit and engage with the positioning hole of the protective cover.
A surgical instrument assembly, characterized by comprising the protective sheath according to any one of claims 1-10 and the surgical instrument according to any one of claims 11-16.