Opener and endoscopic surgical equipment

Abstract

The obturator comprises a sheathing canal with a hollow cavity and an inner core arranged at the far end of the sheathing canal, the inner core is provided with an endoscope body channel allowing an endoscope to penetrate through and an instrument channel allowing a medical instrument to penetrate through, and the endoscope body channel and the instrument channel are both communicated with the hollow cavity and are independent of each other; wherein the instrument channel is provided with an instrument inlet, the instrument inlet is formed in the side, away from the far end of the sheathing canal, of the inner core, and a guiding structure is arranged on the instrument inlet and used for guiding the medical instrument in the hollow cavity into the instrument channel.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and in particular to an obturator and endoscopic surgical equipment. Background Art

[0002] Endoscopic operation is widely used in clinical practice, with advantages such as less damage and fast recovery after surgery. During the operation, an obturator is needed to cooperate with an endoscope and medical instruments for operation. The existing obturator usually has an instrument channel outside, which can be inserted with medical instruments such as surgical forceps. However, when the medical instrument is a hard instrument or a soft instrument, when it enters the human body through the instrument channel, the medical instrument is easily stuck at the instrument entrance, and it is difficult to pass through the instrument channel at one time, thus affecting the operation of medical staff. Summary of the invention

[0003] The present invention provides an obturator and an endoscopic surgical device, which can guide the medical device in the hollow cavity through a guiding structure so that the medical device can smoothly enter the instrument channel from the hollow cavity. It can not only ensure that the medical device can smoothly enter and exit the instrument channel without getting stuck, but also be simple and convenient to operate, and will not cause damage to the medical device during the process of entering and exiting the instrument channel.

[0004] According to a first aspect of the present invention, the present invention provides an obturator, comprising a sheath tube having a hollow cavity and an inner core arranged at the distal end of the sheath tube, the inner core having a scope channel for an endoscope to pass through and an instrument channel for a medical instrument to pass through, the scope channel and the instrument channel are both connected to the hollow cavity and are independent of each other;

[0005] The instrument channel has an instrument entrance, which is arranged on a side of the inner core away from the distal end of the sheath tube. A guiding structure is arranged on the instrument entrance for guiding the medical device in the hollow cavity into the instrument channel.

[0006] In the obturator according to one embodiment of the present invention, the guide structure comprises a guide groove, and the guide groove extends from the instrument entrance toward one side of the instrument channel.

[0007] In the obturator according to one embodiment of the present invention, the guide groove is surrounded by guide angles that gradually tilt and open toward the outside.

[0008] In the obturator of one embodiment of the present invention, the guide angle includes a guide bevel, and the guide bevel is at least arranged on a side close to the inner wall of the sheath tube; and / or the guide bevel is arranged on a side close to the scope channel.

[0009] In the obturator according to one embodiment of the present invention, the guide slope extends along the central axis direction of the guide groove and is arranged at an acute angle.

[0010] In the obturator of one embodiment of the present invention, the guide slope extends from the instrument entrance toward the guide groove and forms an inverted truncated cone-shaped guide portion, and the center of the guide portion is eccentrically disposed relative to the center point of the guide groove.

[0011] In the obturator of one embodiment of the present invention, the guide angle includes a guide arc surface, the guide groove has a first side close to the mirror body channel and a second side in contact with the inner wall of the hollow cavity, and the guide curved surface is arranged between the first side and the second side.

[0012] In the obturator of one embodiment of the present invention, the guide curved surface includes a first curved surface, a second curved surface and a third curved surface, and the third curved surface is connected between the first curved surface and the second curved surface and is recessed inwardly relative to the first curved surface and the second curved surface.

[0013] In the obturator according to one embodiment of the present invention, the curvature of the guide curved surface is greater than the curvature of the insertion portion of the medical instrument.

[0014] In the obturator of one embodiment of the present invention, the scope channel has a scope entrance, which is arranged on a side of the hollow cavity away from the distal end of the sheath tube, and a guide surface is provided on the circumference of the scope entrance for guiding the endoscope to enter the scope channel.

[0015] In the obturator of one embodiment of the present invention, the mirror body channel includes a first channel and a second channel connected to each other and having different inner diameters, and the first channel is parallel to the axis of the second channel and forms a mirror body channel with an eight-shaped cross section.

[0016] In the obturator of one embodiment of the present invention, the mirror body channel also includes a third channel connected to the first channel, the third channel is arranged on a side opposite to the second channel, and the inner diameters of the third channel and the second channel are smaller than the inner diameter of the first channel.

[0017] In the obturator according to one embodiment of the present invention, the first channel is disposed adjacent to the instrument channel.

[0018] According to a second aspect of the present invention, the present invention further provides an endoscopic surgical device, comprising the above-mentioned obturator.

[0019] The technical solution provided by the embodiment of the present application may include the following beneficial effects: the present application designs an obturator and an endoscopic surgical device, including a sheath and an inner core arranged at the distal end of the sheath, the inner core having a mirror body channel and an instrument channel that are independent of each other, and the sheath having a hollow cavity connected to the mirror body channel and the instrument channel. The mirror body channel is used for the endoscope to pass through, so that the endoscope can pass through the mirror body channel to enter the body for intuitive observation; the instrument channel is used for the medical device to pass through, so that the medical device can pass through the instrument channel to enter the body for corresponding surgery.

[0020] Since the scope channel and the instrument channel are independent of each other, and the size of the instrument channel is usually small, it is easy for the medical device to get stuck when passing through the hollow cavity and entering the instrument channel. Therefore, the present application sets a guide structure at the instrument entrance of the instrument channel to guide the medical device in the hollow cavity into the instrument channel, which can prevent the end of the medical device facing the instrument channel from hitting the end surface of the inner core and getting stuck, and provide guidance for the movement of the instrument channel, so that the instrument channel can enter the instrument channel more smoothly and pass through the instrument channel to reach the body.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0023] Figure 1 is a schematic structural diagram of an obturator provided by an embodiment of the present application;

[0024] Figure 2 yes Figure 1 A diagram of the medical device in use after being inserted behind the obturator;

[0025] Figure 3 yes Figure 2 A schematic cross-sectional view of the obturator at the distal end;

[0026] Figure 4 yes Figure 1 The obturator is in the use state diagram at the distal end;

[0027] Figure 5 yes Figure 2 A schematic diagram of the structure of the inner core in FIG.

[0028] Figure 6 yes Figure 5A schematic cross-sectional view of an inner core in;

[0029] Figure 7 yes Figure 1 Schematic diagram of the cross-section of the obturator at the distal end.

[0030] Description of reference numerals:

[0031] 100. medical device; 101. insertion portion; 200. endoscope;

[0032] 10. sheath; 11. hollow cavity;

[0033] 20, inner core; 20a, instrument inlet; 20b, instrument outlet; 21, mirror channel; 211, first channel; 212, second channel; 213, third channel; 22, instrument channel; 23, guide structure; 23a, guide groove; 231, guide slope; 232, guide arc surface;

[0034] 30. Endoscope connector;

[0035] 40. Instrument connector;

[0036] 50. Sheath seat. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should also be understood that the terms used in this specification of the present invention are only for describing specific realities. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] like Figures 1 to 7 As shown, according to the first aspect of the present application, the present application provides an obturator for entering the human body to assist in the development of surgery. The obturator includes a sheath tube 10 and an inner core 20 disposed at the distal end of the sheath tube 10. The inner core 20 has a mutually independent scope channel 21 and an instrument channel 22. The scope channel 21 is used for the endoscope 200 to pass through, so that the endoscope 200 can pass through the scope channel 21 to enter the patient's body for observation; the instrument channel 22 is used for the medical device 100 to pass through, so that the medical device 100 can pass through the instrument channel 22 to enter the patient's body for corresponding surgery. At the same time, when the endoscope 200 cooperates with the medical device 100 to perform surgery, the endoscope 200 can also enter the patient's body together with the obturator to observe during the operation of the medical device 100, providing better conditions for smooth and accurate surgery, without the need for medical personnel to repeatedly plug and unplug, and reducing the medical personnel's intraoperative operations.

[0041] For example, during surgery, the endoscope 200 enters the human body from the scope channel 21, and the medical device 100 is inserted into the human body from the instrument channel 22. The operator uses the medical device 100 to perform corresponding surgical operations on the surgical site under the field of view provided by the endoscope 200. Among them, since the scope channel 21 and the instrument channel 22 are independent of each other, the medical device 100 and the endoscope 200 are prevented from interfering with each other during the operation, which not only protects the endoscope 200, but also facilitates the medical device 100 to enter the patient's body through the instrument channel 22 to perform corresponding surgical operations.

[0042] In this embodiment, the sheath 10 has a hollow cavity 11, and the scope channel 21 and the instrument channel 22 are both connected to the hollow cavity 11, so that the endoscope 200 and the medical device 100 can respectively enter the scope channel 21 and the instrument channel 22 through the hollow cavity 11. Therefore, when medical personnel perform surgery with the medical device 100, they can observe the patient's surgical site more intuitively through the endoscope 200, and observe the surgical situation more conveniently, thereby increasing the safety of the surgery.

[0043] Since both the scope channel 21 and the instrument channel 22 are formed at one end of the inner core 20 located inside the hollow cavity 11, and the aperture of the instrument channel 22 is smaller than that of the scope channel 21. In order to guide the medical device 100 from the hollow cavity 11 to the instrument channel 22 and enter the instrument channel 22, the present invention provides a guide structure 23 at the instrument entrance 20a of the instrument channel 22, so that when the medical device 100 enters the instrument channel 22 from the hollow cavity 11, when the distal end of the instrument channel 22 approaches the guide structure 23 provided at the instrument entrance 20a, the instrument channel 22 can move along the guide structure 23 to the instrument entrance 20a, and then enter the instrument channel 22 of the shell from the instrument entrance 20a. Among them, when the medical staff is performing the operation, the proximal end refers to the end away from the patient or close to the medical staff, and the distal end refers to the end located at the patient or away from the medical staff.

[0044] Exemplarily, the inner core 20 has a first end and a second end, the first end is arranged on the side of the inner core 20 away from the distal end of the sheath 10, that is, the end of the sheath 10 away from the patient; the second end is arranged on the side of the inner core 20 close to the distal end of the sheath 10, that is, the end of the sheath 10 close to the patient. In this embodiment, the instrument inlet 20a is arranged on the end face of the first end, and the instrument outlet 20b is arranged on the end face of the second end. When the medical device 100 enters the instrument channel 22 from the instrument inlet 20a, it passes through the instrument channel 22 and extends from the instrument outlet 20b, and then extends into the patient's body for surgical operation. Among them, the guide structure 23 is used to guide the medical device 100 to quickly enter the instrument channel 22, to prevent the medical device 100 from being stuck by the step formed between the first end and the hollow cavity 11 during insertion, and it is difficult to pass smoothly through the instrument channel 22 at one time, thereby affecting the operation of medical personnel.

[0045] After adopting the above technical solution, since at least the scope channel 21 and the instrument channel 22 are formed on the inner core 20, the scope channel 21 and the instrument channel 22 can be either round holes or irregular curved holes. When the inner core 20 is installed in the hollow cavity 11, there may be a step between the inner core 20 and the inner side wall of the sheath tube 10. When a medical device 100 such as a pliers enters the instrument channel 22 from the hollow cavity 11, the insertion portion 101 of the medical device 100 is easy to abut against the end faces or steps on both sides of the instrument channel 22, thereby causing a jam. Therefore, the present application can guide the direction of the insertion portion 101 of the medical device 100 by setting a guiding structure 23 at the instrument entrance 20a, so that the insertion portion 101 of the medical device 100 can quickly enter the instrument channel 22 from the instrument entrance 20a, thereby solving the problem that the insertion portion 101 of the medical device 100 is stuck at the end face of the first end or the step at the connection with the sheath 10 and cannot pass smoothly through the instrument channel 22 at one time, especially when some semi-rigid or soft medical devices 100 enter the human body through the instrument channel 22.

[0046] In an optional embodiment, if Figure 1 and Figure 2 As shown, the obturator includes a sheath seat 50, an endoscope connector 30 and an instrument connector 40. The endoscope connector 30 and the instrument connector 40 are installed to the proximal end of the sheath 10 through the sheath seat 50, so that the endoscope 200 can be placed into the hollow cavity 11 through the endoscope connector 30, and then slide along the hollow cavity 11 to the scope channel 21, and the medical device 100 can be placed into the hollow cavity 11 through the instrument connector 40, and then slide along the hollow cavity 11 to the instrument channel 22. Among them, the axis of the endoscope connector 30 is parallel to the axis of the sheath 10, and the axis of the instrument connector 40 is set at an angle to the axis of the sheath 10. After the medical device 100 enters the hollow cavity 11 through the instrument connector 40, the medical device 100 is easily guided to move to one side of the endoscope connector 30, and the present application guides the medical device 100 to the instrument channel 22 through the guiding structure 23 at the instrument entrance 20a.

[0047] In an optional embodiment, the guide structure 23 is integrally formed with the inner core 20 and is fixed to the distal end of the sheath 10 after the mirror channel 21 and the instrument channel 22 are opened, so that the distal end of the hollow cavity 11 can be divided into two channels, namely the mirror channel 21 and the instrument channel 22. The medical device 100 can then be guided into the instrument channel 22 through the guide structure 23, thereby solving the problem of the medical device 100 getting stuck easily when entering the instrument channel 22 from the hollow cavity 11.

[0048] In an optional embodiment, if Figures 3 to 7As shown, the guide structure 23 includes a guide groove 23a, which extends from the instrument entrance 20a toward one side of the instrument channel 22, so that the medical device 100 can move along the guide groove 23a into the instrument channel 22 to avoid jamming. The size of the guide groove 23a gradually increases toward the end surface direction close to the first end, which is used to limit the insertion direction of the medical device 100, so that the medical device 100 can be introduced into the instrument channel 22, avoiding the problem of the medical device 100 jamming due to the abutment on the first end, thereby ensuring that the medical device 100 can pass smoothly through the instrument channel 22 at one time.

[0049] It should be noted that the guide groove 23a is formed at the instrument entrance 20a by machining or anisotropic etching. Compared with the guide structure 23 formed at the instrument entrance 20a by means of assembly or welding or other filling methods, its processing difficulty is simple, the cost is low, and there will be no problems such as falling off, thereby ensuring the safety of the operation.

[0050] In an optional embodiment, the guide groove 23a is formed with a guide angle that gradually tilts and opens toward the outside, so that the medical device 100 can smoothly enter the device channel 22 from the device entrance 20a. The guide slope 231 formed by the guide angle can enable the insertion part 101 to gradually slide to the device entrance 20a along the slope surface, and can buffer the direct impact of the insertion part 101 and the first end, so that the insertion part 101 can move smoothly along the guide slope 231 toward the device entrance 20a under external force when it contacts the guide slope 231, without directly bearing the impact of the insertion part 101, and also prevent the insertion part 101 from being guided to one side of the mirror body channel 21.

[0051] In an optional embodiment, the guide angle includes a guide bevel 231, and the guide bevel 231 is at least arranged on a side close to the inner wall of the sheath tube 10, so that when the insertion part 101 slides to the side close to the inner wall of the sheath tube 10, it can slide along the guide bevel 231 to the instrument channel 22, thereby preventing the insertion part 101 from being stuck on the side of the instrument entrance 20a close to the inner wall of the sheath tube 10.

[0052] In an optional embodiment, the guide bevel 231 is arranged on a side close to the mirror body channel 21, so that when the insertion part 101 slides to the side close to the mirror body channel 21, it can slide along the guide bevel 231 to the instrument channel 22, thereby preventing the insertion part 101 from being stuck on the side of the instrument entrance 20a close to the mirror body channel 21.

[0053] In an optional embodiment, the guide bevel 231 extends along the central axis direction of the guide groove 23a and is set at an acute angle. When the insertion portion 101 abuts against the guide bevel 231 and moves along the guide bevel 231, the guide surface can provide a guiding force to the insertion portion 101, facilitating the insertion portion 101 to move toward one side of the instrument channel 22, and preventing the insertion portion 101 from being stuck on the side of the instrument inlet 20a close to the inner wall of the sheath 10 or the body channel 21. The guide bevel 231 set at an acute angle can make the leading edge of the instrument inlet 20a more closely fit the inner wall of the sheath 10 and the outer wall of the endoscope 200, so that the insertion portion 101 can be introduced into the instrument inlet 20a more quickly.

[0054] In an optional embodiment, the guide slope 231 extends from the instrument entrance 20a to the guide groove 23a and forms an inverted frustum-shaped guide portion, and the center of the guide portion is eccentrically arranged relative to the center point of the guide groove 23a, so that the guide slope 231 can be arranged at the first end to form an eccentric inverted cone, so that the insertion portion 101 in contact with the first end can be quickly guided into the instrument entrance 20a.

[0055] In an optional embodiment, the guide angle includes a guide arc surface 232, the guide groove 23a has a first side close to the mirror body channel 21 and a second side in contact with the inner wall of the hollow cavity 11, and the guide curved surface is arranged between the first side and the second side for guiding the insertion part 101 into the instrument entrance 20a.

[0056] For example, the guiding slope 231 is disposed at the first side and the second side, and the guiding arc surface 232 is disposed between the first side and the second side and combined with the guiding slope 231 to guide the insertion portion 101 to enter the instrument entrance 20a.

[0057] In an optional embodiment, the guiding curved surface includes a first curved surface, a second curved surface and a third curved surface, and the third curved surface is connected between the first curved surface and the second curved surface and is recessed inward relative to the first curved surface and the second curved surface to form a slide groove structure inclined toward the instrument entrance 20a, and both ends of the slide groove structure are higher than the middle part of the slide groove structure, so that the insertion part 101 can be guided to the third curved surface after contacting the guiding curved surface, and then guided to the instrument entrance 20a through the third curved surface.

[0058] In an optional embodiment, the curvature of the guide surface is greater than the curvature of the insertion portion 101 of the medical device 100, so that the insertion portion 101 can be guided along the guide surface to the instrument entrance 20a, effectively preventing the insertion portion 101 from being stuck in the process of entering the instrument entrance 20a, thereby improving the smoothness of the sliding process.

[0059] In an optional embodiment, the scope channel 21 has a scope entrance, which is arranged on a side of the hollow cavity 11 away from the distal end of the sheath tube 10, and a guide surface is provided on the peripheral side of the scope entrance for guiding the endoscope 200 to enter the scope channel 21, so that the endoscope 200 can quickly pass through the scope entrance into the scope channel 21.

[0060] After adopting the above technical method, a guide surface is provided on the entrance of the scope body, which enables the endoscope 200 to be smoothly and accurately inserted into the corresponding scope body entrance, improves the positioning accuracy, simplifies the alignment action of the endoscope 200 during the insertion process, and enhances the convenience of use.

[0061] In an optional embodiment, the scope channel 21 includes a first channel 211 and a second channel 212 which are interconnected and have different inner diameters. The first channel 211 is parallel to the axis of the second channel 212 and forms an eight-shaped cross-section of the scope channel 21 so as to accommodate endoscopes 200 of different sizes. At the same time, the most compact scope channel 21 can also be obtained.

[0062] Exemplarily, the endoscope 200 includes a first endoscope 200 and a second endoscope 200. The outer diameter of the first endoscope 200 is adapted to the outer diameter of the first channel 211, and the outer diameter of the second endoscope 200 is adapted to the outer diameter of the second channel 212. When surgery is required through the first endoscope 200, the first endoscope 200 can be inserted into the first channel 211; when surgery is required through the second endoscope 200, the second endoscope 200 can be inserted into the second channel 212 to quickly meet the size requirements of the endoscope 200 for the scope channel 21.

[0063] In an optional embodiment, the scope channel 21 also includes a third channel 213 connected to the first channel 211, and the third channel 213 is arranged on a side opposite to the second channel 212, and the inner diameters of the third channel 213 and the second channel 212 are smaller than the inner diameter of the first channel 211, further satisfying the size requirements of the endoscope 200 for the scope channel 21, and different endoscopes 200 can be selected according to different application scenarios; at the same time, the most compact scope channel 21 can also be obtained, which is convenient for the use of the scope channel 21, and the layout of the entire obturator is reasonable and compact, satisfying the clinical requirement that the outer diameter of the obturator is as small as possible and the internal space is utilized as much as possible.

[0064] In an optional embodiment, the first channel 211 is arranged adjacent to the instrument channel 22, the size of the first channel 211 is larger than the sizes of the second channel 212 and the third channel 213, and the second channel 212 and the third channel 213 are on both sides of the first channel 211, and the instrument channel 22 is arranged on the extension line of the symmetry axis of the second channel 212 and the third channel 213 or in the vicinity of the extension line, so that the first channel 211, the second channel 212, the third channel 213 and the instrument channel 22 can be opened on the inner core 20 with a very small outer diameter, so that the internal space of the inner core 20 can be utilized as much as possible, making the layout of the entire inner core 20 reasonable and compact.

[0065] After adopting the above technical solution, since the obturator has a scope channel 21 and an instrument channel 22, and in order to facilitate the manufacture of the obturator, the obturator at least includes a sheath tube 10 and an inner core 20, and the inner core 20 is arranged at the distal end of the sheath tube 10. Among them, the scope channel 21 and the instrument channel 22 are formed on the inner core 20, and the sheath tube 10 has a hollow cavity 11 connected with the scope channel 21 and the instrument channel 22. During the operation, the endoscope 200 and the medical device 100 both enter the scope channel 21 and the instrument channel 22 through the hollow cavity 11, so that the endoscope 200 can cooperate with the medical device 100 to perform the operation. However, the medical device 100, especially the flexible or semi-rigid device, is easily stuck at the end where the inner core 20 extends into the hollow cavity 11, and it is difficult to pass smoothly through the instrument channel 22 at one time, thereby affecting the doctor's operation. Therefore, the present application sets a guiding structure 23 at the instrument entrance 20a, so that the medical device 100 can be guided into the instrument entrance 20a and into the instrument channel 22, so as to avoid the medical device 100 hitting the connection between the inner core 20 and the sheath 10, causing jamming, thereby solving the problem that the medical device 100 is easily stuck in the obturator, and also solving the problem that the inner core 20 is provided with a scope channel 21 and an instrument channel 22 of different sizes. During use, an obturator can simultaneously meet the insertion of the endoscope 200 and the insertion of the instrument, and the scope channel 21 includes at least a first channel 211, a second channel 212 and a third channel 213, which can meet the size requirements of endoscopes 200 of different specifications, so that the obturator has a wider range of applications, reduces the procurement cost and management cost of the hospital, and thus reduces the cost of surgery.

[0066] like Figures 1 to 7 As shown, according to the second aspect of the present application, the present application provides an endoscopic surgical device, comprising the above-mentioned obturator.

[0067] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0068] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0069] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. An obturator, characterized in that: It comprises a sheath tube and an inner core arranged at the distal end of the sheath tube, wherein the sheath tube has a hollow cavity for an endoscope and a medical device to enter and exit, and the inner core has a scope channel for the endoscope to pass through and an instrument channel for the medical device to pass through, and the scope channel and the instrument channel are both connected to the hollow cavity and are independent of each other; Among them, the instrument channel has an instrument entrance for the medical instrument to enter, and the instrument entrance is arranged on the side of the inner core away from the distal end of the sheath tube. A guide structure is arranged on the instrument entrance, and the guide structure is used to guide the medical instrument in the hollow cavity into the instrument channel.

2. The obturator according to claim 1, characterized in that: The guiding structure comprises a first guiding structure and a second guiding structure, wherein the first guiding structure and the second guiding structure are both connected to the instrument inlet and engaged with each other, and are used to guide the medical instrument to the instrument inlet.

3. The obturator according to claim 2, characterized in that: The first guiding structure is arranged at one side of the instrument entrance and gradually opens obliquely from the instrument entrance toward the inner wall of the sheath tube to form a guiding angle structure.

4. The obturator according to claim 3, characterized in that: The first guiding structure includes a first inclined plane and / or a second inclined plane, wherein the second inclined plane is arranged on a side close to the mirror body channel; the first inclined plane is arranged on an opposite side of the second inclined plane and is located on a side close to the inner wall of the sheath tube.

5. The obturator according to claim 4, characterized in that: The first inclined surface and / or the second inclined surface extend along the central axis direction of the instrument channel and are arranged at an acute angle.

6. The obturator according to claim 3, characterized in that: The first guiding structure includes a first inclined surface and a second inclined surface, and two sides of the second guiding structure are respectively connected to the first inclined surface and the second inclined surface to form an inverted truncated cone-shaped guiding portion.

7. The obturator according to claim 6, characterized in that: The second guiding structure includes a first curved surface, a second curved surface and a third curved surface, the first curved surface is engaged with the first inclined surface, the second curved surface is engaged with the second inclined surface, and the third curved surface is connected between the first curved surface and the second curved surface and is recessed inward relative to the first curved surface and the second curved surface to form a groove structure for guiding the medical device to the device entrance.

8. The obturator according to claim 7, characterized in that: The curvature radii of the first curved surface, the second curved surface and the third curved surface are greater than the curvature radius of the insertion portion of the medical device.

9. The obturator according to claim 7, characterized in that: A guide angle structure inclined toward the instrument entrance is provided at the junction of the third curved surface and the instrument entrance.

10. The obturator according to any one of claims 2 to 9, characterized in that: The second guide structure is substantially extended along the radial direction of the inner core and is connected to the first guide structure and the instrument inlet respectively.

11. The obturator according to claim 7, characterized in that: The second guiding structure comprises a guiding groove, which is connected to the first guiding structure and is recessed inwardly relative to the first guiding structure to form a step.

12. The obturator according to claim 1, characterized in that: The scope channel has a scope entrance, which is arranged on a side of the hollow cavity away from the distal end of the sheath tube, and a guide surface is provided on the circumference of the scope entrance for guiding the endoscope to enter the scope channel.

13. An endoscopic surgical device, characterized in that: The invention comprises the obturator according to any one of claims 1 to 12.

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