CN220124806U

CN220124806U - Endoscope

Info

Publication number: CN220124806U
Application number: CN202321693692.3U
Authority: CN
Inventors: 杨荔
Original assignee: Jiangmen Shuotong Medical Equipment Technology Co ltd
Current assignee: Jiangmen Shuotong Medical Equipment Technology Co ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-12-05
Anticipated expiration: 2033-06-30

Abstract

The utility model discloses an endoscope, which comprises a handle, a scope tube, an inner sheath tube and an outer sheath tube, wherein the rear end of the scope tube is connected with the handle, the front end of the scope tube is provided with an electronic camera in a sealing way, the inner sheath tube is detachably sleeved on the scope tube, the outer sheath tube is detachably sleeved on the inner sheath tube, an instrument channel, a perfusion channel and a visual signal output channel are arranged in the scope tube, the instrument channel and the perfusion channel are mutually independent channels or share channels, and the handle is provided with a perfusion inlet communicated with the perfusion channel, an instrument inlet communicated with the instrument channel and a cable connection port for transmitting visual signals; when the endoscope is used for perfusion, lithotripsy and calculus removal, the outer sheath is left in the human body, and the inner sheath is removed, so that a suction channel is formed in a gap between the outer sheath and the endoscope. By adopting the utility model, not only can the stones in the body be crushed under the visual operation, but also the suction and cleaning of the stones can be realized, the pressure in the kidney can be controlled, and the influence of the excessive pressure in the kidney cavity on the kidney function can be avoided.

Description

Endoscope

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to an endoscope.

Background

In recent years, with the development of medical technology and scientific development, a brand-new therapeutic means, namely minimally invasive therapy, appears in the medical field, and a brand-new therapeutic concept appears. Compared with the traditional surgical operation, the functional minimally invasive surgical technique of the medical endoscope has been widely accepted by doctors and patients, the medical endoscope utilizes natural holes of human bodies or a plurality of small holes are formed when necessary, and the doctors can perform in-vitro airtight surgical operation in the body through other surgical instruments and an imaging display system only by skillfully penetrating the lens of the endoscope into the body.

However, urological endoscopes are often used in vivo calculus surgery, and at present, the way of treating calculus is generally as follows: the stones are broken and discharged by the human body by oneself, but the way can not really remove the stones in the human body, the stones of the human body can not be completely discharged, and the part which can not be discharged easily forms focus, so that the stones are recrudesced; on the other hand, during the operation, the stones are prevented from being wrapped by human tissues due to the fact that the spaces in the kidneys are not filled, and the stones cannot be broken, and physiological saline or other liquid is generally required to be poured into the spaces in the kidneys to fill the spaces in the kidneys, so that the stones are exposed to the visual field. However, perfusion with physiological saline causes an increase in intra-renal pressure, and if the operation time is long, too high pressure may affect renal function.

Disclosure of Invention

The utility model aims to provide an endoscope which can crush stones in a body under visual operation, realize suction cleaning of the stones, realize controllable pressure in the kidney and avoid the influence of excessive pressure in the kidney cavity on the kidney function.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the endoscope comprises a handle, a scope tube, an inner sheath tube and an outer sheath tube, wherein the rear end of the scope tube is connected with the handle, an electronic camera is mounted at the front end of the scope tube in a sealing manner, the inner sheath tube is detachably sleeved on the scope tube, the outer sheath tube is detachably sleeved on the inner sheath tube, an instrument channel, a perfusion channel and a visual signal output channel are arranged in the scope tube, the instrument channel and the perfusion channel are mutually independent channels or share channels, a scope tube interface through which the scope tube can pass, a perfusion inlet communicated with the perfusion channel, an instrument inlet communicated with the instrument channel and a cable connector for transmitting visual signals are arranged on the handle, and a transmission line of the electronic camera is connected to the cable connector through the visual signal output channel; when the endoscope is used for perfusion, lithotripsy and calculus removal, the outer sheath is left in the human body, and the inner sheath is removed, so that a suction channel is formed by a gap between the outer sheath and the endoscope.

As a preferable scheme of the utility model, the tube body of the inner sheath tube and the tube body of the outer sheath tube are cylindrical, and the tube body of the mirror tube is elliptical; the outer diameter of the inner sheath tube is matched with the inner diameter of the outer sheath tube, the front end of the endoscope tube extends out of the front end of the inner sheath tube, the front end of the inner sheath tube extends out of the front end of the outer sheath tube and forms a conical tube with a gradually reduced tube opening, and the tube opening at the front end of the conical tube is attached to the shape of the endoscope tube.

As a preferable mode of the utility model, an external thread part for connecting the inner sheath tube is formed on the outer side of the lens tube interface; the rear end of the inner sheath tube is provided with a nut joint in threaded connection with the external thread part.

As a preferable scheme of the utility model, the rear end of the outer sheath tube is provided with a handheld sleeve and a rotary inner core rotatably connected in the handheld sleeve, the rotary inner core radially extends towards the axis of the handheld sleeve to form a clamping table, the rear end of the inner sheath tube extends towards one side far away from the external thread part to form a clamping sleeve, the outer wall of the clamping sleeve is provided with a clamping groove, the clamping sleeve is inserted into the handheld sleeve, and the rotary inner core rotates to enable the clamping table to be clamped into the clamping groove.

As a preferable scheme of the utility model, the handle is of a shell structure, the outer surface of the handle is of an irregular curved surface matched with a semi-fist making gesture, a similar cylindrical column body for a thumb and an index finger to be buckled is formed at the top of the handle, and the cable connector is arranged at the upper end of the similar cylindrical column body; the front part of the handle is provided with a front curved surface which gradually bulges forwards from top to bottom, the mirror tube joint is arranged at the outermost end of the front curved surface, the rear part of the handle is provided with a conical column extending from the palm center to the palm heel, the instrument inlet is arranged at the rear end of the conical column, and the instrument inlet is coaxial with the mirror tube joint; the bottom of the handle is provided with a lower curved surface which bulges downwards, and the lower curved surface is matched with a bearing contact surface formed by bending the middle finger, the ring finger and the tail finger; the priming inlet is disposed in a central position of the side of the handle.

As a preferable mode of the utility model, two perfusion inlets are arranged on the left side part and the right side part of the handle respectively.

As a preferable scheme of the utility model, the pouring inlet is matched with a water stop cap.

As a preferable scheme of the utility model, an inward concave arc surface is arranged at the center of the side part of the handle, the pouring inlet is arranged in the inward concave arc surface, and the height of the water stop cap is smaller than or equal to the inward concave depth of the inward concave arc surface.

As a preferable mode of the present utility model, the central axis of the cable connection port is perpendicular to the central axis of the instrument inlet.

As a preferred embodiment of the present utility model, the instrument inlet is connected with a sealing plug.

Compared with the prior art, the endoscope provided by the utility model has the beneficial effects that:

(1) According to the endoscope, the suction channel formed by the gap between the outer sheath tube and the endoscope tube is utilized, so that calculus is crushed in the body under visual operation, meanwhile, the suction cleaning of the calculus is realized, and the recurrence of the calculus is effectively prevented;

(2) The endoscope has the functions of perfusion and suction, can realize controllable pressure in the kidney, controls the condition of filling in the kidney by adjusting the magnitude of negative pressure of suction, avoids overlarge pressure in the kidney cavity, and has higher operation safety;

(3) The endoscope can utilize a single endoscope tube to combine the outer sheath tube and the outer sheath tube with different specifications to change the insertion outer diameter of the endoscope, so that the requirements of different sizes are met for different cases, and the cost for preparing the endoscope body with various specifications is saved.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings of the embodiments will be briefly described below.

FIG. 1 is a schematic view of an endoscope in a body view;

FIG. 2 is a schematic view of the endoscope in combination with a three-way joint;

FIG. 3 is an enlarged view of the structure shown in FIG. 1 at A;

FIG. 4 is an enlarged view at B of the structure shown in FIG. 2;

FIG. 5 is a schematic diagram of the structure of a lens interface;

FIG. 6 is a schematic view of the structure of the rear end portion of the outer sheath;

FIG. 7 is a schematic view of the structure of the rear end portion of the inner sheath;

FIG. 8 is a schematic view of the structure of an endoscope handle;

FIG. 9 is a front view of the other side of the endoscope handle looking downward;

FIG. 10 is a gesture of an operation performed by grasping an endoscope handle according to an embodiment of the present utility model;

fig. 11 is a gesture view of a conventional endoscope handle held for operation.

The marks in the figure:

a handle 1; a column 11 of a quasi-cylindrical shape; a cable connection port 12; a front curved surface 13; a scope tube interface 14; a conical-like column 15; an instrument inlet 16; a lower curved surface 17; a priming inlet 18; a water stop cap 19; a sealing plug 110; an inward concave arc surface 111; an external thread portion 112; a lens tube 2; an electronic camera 21; an instrument channel 22; a perfusion channel 23; a visual signal output channel 24; an inner sheath 3; a conical tube 31; a nut fitting 32; a ferrule 33; a card slot 34; an outer sheath 4; a hand-held sleeve 41; rotating the inner core 42; a clamping table 43; a shifter handle 44; a suction passage 5; and a three-way joint 6.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 10 together, an endoscope according to an embodiment of the present utility model will now be described.

As shown in fig. 1 to 8, the endoscope of the embodiment of the utility model comprises a handle 1, a scope tube 2, an inner sheath tube 3 and an outer sheath tube 4, wherein the rear end of the scope tube 2 is connected with the handle 1, the front end of the scope tube 2 is provided with an electronic camera 21 in a sealing way, the inner sheath tube 3 is detachably sleeved on the scope tube 2, the outer sheath tube 4 is detachably sleeved on the inner sheath tube 3, an instrument channel 22, a perfusion channel 23 and a visual signal output channel 24 are arranged in the scope tube 2, and the instrument channel 22 and the perfusion channel 23 are mutually independent channels or shared channels; the handle 1 is provided with a lens tube interface 14 through which the lens tube 2 can pass, a perfusion inlet 18 communicated with the perfusion channel 23, an instrument inlet 16 communicated with the instrument channel 22 and a cable connector 2 for transmitting visual signals; the transmission line of the electronic camera 21 is connected to the cable connection port 2 through the visual signal output channel 24; when the lithotripsy operation system of the endoscope 1 is used for perfusion, lithotripsy and calculus removal, the outer sheath 4 is left in the human body, and the inner sheath 3 is removed, so that a gap between the outer sheath 4 and the scope 2 forms a suction channel 5. In this embodiment, the instrument channel 22 and the perfusion channel 23 are preferably common channels, so as to reduce difficulty and cost of manufacturing the scope channel; the suction channel 5 is a channel through which waste liquid with crushed stone can pass; the perfusion inlet 18 is used for externally connecting a perfusion system; the instrument inlet 16 is used for externally connecting holmium laser optical fibers; the cable connection port 2 is used for externally connecting an external observation screen. In addition, the front end of the lens tube 2 is provided with an illumination optical fiber in a sealing manner, the illumination optical fiber penetrates through the visual signal output channel 24 and extends into the handle 1, an LED light source is arranged in the handle 1, and light emitted by the LED light source is conducted through the illumination optical fiber and is emitted out of the front end of the lens tube 2.

The function of the component module of the present utility model is further explained by means of an intrarenal lithotripsy procedure as follows:

when in use, the inner sheath tube 3 is firstly locked and attached to the endoscope tube 2, and the outer sheath tube 4 is locked and attached to the inner sheath tube 3. After the locking is completed, the artificial kidney enters from the urethral orifice of the human body, passes through the bladder and the ureter to reach the renal pelvis, and the image is shot by the electronic camera 21 to be observed, so that the artificial kidney reaches the position of the calculus. The locking structure on the outer sheath tube 4 and the inner sheath tube 3 is opened, the endoscope tube 2 and the inner sheath tube 3 are withdrawn from the human body together, and the outer sheath tube 4 is left in the human body to form a hard body entering channel. After the endoscope tube 2 and the inner sheath tube 3 exit the human body, the locking structure on the inner sheath tube 3 and the endoscope tube 2 is opened, and the inner sheath tube 3 is detached; then the three-way joint 6 is locked and attached to the rear end of the outer sheath tube 4 and is connected to a perfusion system through a pipeline, and holmium laser optical fibers are inserted from the instrument inlet 16 until the holmium laser optical fibers extend out of the front end pipe orifice of the endoscope tube 2 by 5mm-6mm; and then starting a perfusion system to perfuse normal saline, and penetrating the endoscope tube 2 into the tee joint 6 to reenter the outer sheath tube 4 after the normal saline flows out from the front end tube orifice of the endoscope tube 2 through the perfusion channel 23, wherein a suction channel 5 is formed between the endoscope tube 2 and the outer sheath tube 4, and the suction channel 5 is connected with a negative pressure suction system through the tee joint 6. After the above steps are completed, after the interior space of the renal pelvis is filled with the perfused liquid, the stones are exposed to the visual field of the electronic camera 21, and the negative pressure suction system can be started simultaneously to control the condition of filling in the kidney, so that the excessive pressure in the renal cavity is avoided; the lens tube 2 can easily reach the position of the stone under the visual operation, the laser stone breaking device is started, the stone is broken by the laser emitted by the holmium laser fiber, broken stone is sucked away through the suction channel 5 under the suction of the negative pressure suction system, and all the components are withdrawn from the human body after the broken stone is cleaned.

Therefore, according to the endoscope provided by the embodiment of the utility model, the suction channel 5 formed by the gap between the outer sheath tube 4 and the endoscope tube 2 is utilized to crush stones in the body under visual operation, and meanwhile, the suction cleaning of the stones is realized, so that the recurrence of the stones is effectively prevented; in addition, as the endoscope has a perfusion function and a suction function after being connected with the perfusion system and the negative pressure suction system, the pressure in the kidney can be controlled, the condition of filling in the kidney is controlled by adjusting the magnitude of negative pressure of suction, the excessive pressure in the kidney cavity is avoided, and the operation safety is higher; in addition, the endoscope of the embodiment can also utilize a single endoscope tube to combine the outer sheath tube 4 and the inner sheath tube 3 with different specifications to change the insertion outer diameter of the endoscope lithotripsy operation system, so as to meet the requirements of different cases and use different sizes, and save the cost of preparing the endoscope bodies with various specifications.

Illustratively, the tube body of the inner sheath tube 3 and the tube body of the outer sheath tube 4 are cylindrical, and the tube body of the lens tube 2 is elliptical cylinder; the external diameter of interior sheath 3 with the internal diameter of outer sheath 4 matches, the front end of mirror tube 2 is followed the front end of interior sheath 3 stretches out, the front end of interior sheath 3 is followed the front end of outer sheath 4 stretches out and forms the conical tube 31 that the mouth of pipe reduces gradually, the front end mouth of pipe of conical tube 31 with the appearance laminating of mirror tube 2 to can laminate each other between messenger's mirror tube 2, interior sheath 3 and the outer sheath 4 cup joint, avoid appearing the mouth of pipe edge protuberance of sheath and directly touch the phenomenon of scraping the human body. Since the tubular body of the lens tube 2 is formed in an elliptical cylindrical shape, the cross-sectional area of the suction passage 5 formed between the elliptical cylindrical lens tube and the outer sheath tube 4 is larger than the cross-sectional area of the suction passage 5 formed between the cylindrical lens tube and the outer sheath tube 4, and thus larger crushed stone can be discharged through the suction passage 5, and the applicability is higher.

Illustratively, for facilitating the locking attachment of the inner sheath 3 to the scope 2, the outer side of the scope interface 14 is formed with an external threaded portion 112 for connecting the inner sheath 3; the rear end of the inner sheath 3 is provided with a nut fitting 32 screwed to the male screw 112.

Illustratively, in order to facilitate the locking attachment of the outer sheath 4 to the inner sheath 3, the rear end of the outer sheath 4 is provided with a handheld sleeve 41 and a rotating inner core 42 rotatably connected in the handheld sleeve 41, the rotating inner core 42 radially extends towards the axis of the handheld sleeve 41 to form a clamping table 43, the rear end of the inner sheath 3 extends towards the side far away from the external thread 112 to form a clamping sleeve 33, a clamping groove 34 is formed in the outer wall of the clamping sleeve 33, the clamping sleeve 33 is inserted into the handheld sleeve 41, and the rotating inner core 42 rotates to enable the clamping table 43 to be clamped into the clamping groove 34. Further, a handle 44 is further provided on the rotary inner core 42, which is more convenient to operate.

As shown in fig. 8 to 10, the handle 1 is of a shell structure, the outer shape of the handle 1 is an irregular curved surface matched with a semi-fist making gesture, a column-like body 11 for a thumb and an index finger to be buckled is formed at the top of the handle 1, and the cable connection port 2 is arranged at the upper end of the column-like body 11; the front part of the handle 1 is provided with a front curved surface 3 which gradually bulges forwards from top to bottom, the scope tube interface 14 is arranged at the outermost end of the front curved surface 3, the rear part of the handle 1 is provided with a conical column 15 extending from the palm center to the heel, the instrument inlet 16 is arranged at the rear end of the conical column 15, and the instrument inlet 16 is coaxial with the scope tube interface 14; a lower curved surface 17 which bulges downwards is formed at the bottom of the handle 1, and the lower curved surface 17 is matched with a bearing contact surface formed by bending the middle finger, the ring finger and the tail finger; the pouring inlet 18 is provided in a central position at the side of the handle 1.

Therefore, the handle of the embodiment adopts an ergonomic design, is suitable for the habit gestures of an operator when holding an article by hands, and solves the technical problems of small holding area, inconvenient use and poor comfort of the existing products (shown in figure 11) on the market; the top of the handle 1 is provided with a similar cylindrical column 11 for the thumb and the index finger to be buckled, and the upper end of the similar cylindrical column 11 is provided with a cable connector 2 so as to ensure that a doctor can observe that the cable is not lower than the height of the patient in operation; the front part and the rear part of the handle 1 are respectively provided with an instrument inlet 16 and a lens tube interface 14 which are coaxially arranged, so that medical instruments (such as biopsy forceps and holmium laser) can be conveniently inserted, and meanwhile, when an operator uses the endoscope, the moving range of the lens end of the endoscope is the largest; the bottom of the handle 1 is provided with a lower curved surface 17 which bulges downwards to match with a bearing contact surface formed by bending the middle finger, the ring finger and the tail finger, thereby being beneficial to long-time holding by hands and not easy to cause fatigue; the pouring inlet 18 is arranged at the side part of the handle 1 so as to optimize the problem that the holding area is small and the comfort level is poor due to the fact that the pouring position of the existing product on the market is back.

Illustratively, two perfusion inlets 18 are provided and are provided on the left and right sides of the handle 1, respectively. By the design, the product can be suitable for right-handed hands and left-handed hands. Further, the pouring inlet 18 is provided with a water stop cap 19. When the handle is held by a right hand, the pouring inlet 18 on the left side part is externally connected with a pouring system through a pouring pipe, and the pouring inlet 18 on the right side part is covered and closed through a water stop cap 19; conversely, when the handle is held with the left hand, the pouring inlet 18 on the right side is externally connected with the pouring system through the pouring tube, and the pouring inlet 18 on the left side is closed by the water stop cap 19.

For example, in order to prevent the pouring inlet 18 or the water stop cap 19 from protruding out of the handle 1 to prop against the palm center and influence the holding hand, an inward concave arc surface 111 is arranged at the center of the side part of the handle 1, and the pouring inlet 18 is arranged in the inward concave arc surface 111; the height of the water stop cap 19 is smaller than or equal to the concave depth of the concave arc surface 111.

Illustratively, the central axis of the cable connection port 2 is perpendicular to the central axis of the instrument inlet 16, so that it can be ensured that the doctor can observe the cable to be not lower than the height of the patient in the operation, and the operation in the operation is convenient to the greatest extent.

Illustratively, the instrument inlet 16 is coupled to a sealing plug 110 through which instruments (e.g., holmium laser fibers) may be connected to prevent perfusate from flowing out of the instrument inlet 16.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims

1. The endoscope is characterized by comprising a handle, a scope tube, an inner sheath tube and an outer sheath tube, wherein the rear end of the scope tube is connected with the handle, an electronic camera is hermetically arranged at the front end of the scope tube, the inner sheath tube is detachably sleeved on the scope tube, the outer sheath tube is detachably sleeved on the inner sheath tube, an instrument channel, a perfusion channel and a visual signal output channel are arranged in the scope tube, the instrument channel and the perfusion channel are mutually independent channels or share channels, a scope tube interface through which the scope tube can pass, a perfusion inlet communicated with the perfusion channel, an instrument inlet communicated with the instrument channel and a cable connector for transmitting visual signals are arranged on the handle, and a transmission line of the electronic camera is connected to the cable connector through the visual signal output channel; when the endoscope is used for perfusion, lithotripsy and calculus removal, the outer sheath is left in the human body, and the inner sheath is removed, so that a suction channel is formed by a gap between the outer sheath and the endoscope.

2. The endoscope of claim 1, wherein the tube body of the inner sheath and the tube body of the outer sheath are both cylindrical, and the tube body of the endoscope is elliptical cylindrical; the outer diameter of the inner sheath tube is matched with the inner diameter of the outer sheath tube, the front end of the endoscope tube extends out of the front end of the inner sheath tube, the front end of the inner sheath tube extends out of the front end of the outer sheath tube and forms a conical tube with a gradually reduced tube opening, and the tube opening at the front end of the conical tube is attached to the shape of the endoscope tube.

3. The endoscope of claim 1, wherein an outer side of the scope tube interface is formed with an external thread portion for connecting the inner sheath tube; the rear end of the inner sheath tube is provided with a nut joint in threaded connection with the external thread part.

4. An endoscope according to claim 3, wherein the rear end of the outer sheath is provided with a hand-held sleeve and a rotating inner core rotatably connected in the hand-held sleeve, the rotating inner core radially extends towards the axis of the hand-held sleeve and is provided with a clamping block, the rear end of the inner sheath extends towards the side far away from the external thread part and is provided with a clamping groove, the clamping block is inserted into the hand-held sleeve, and the rotating inner core rotates to enable the clamping block to be clamped into the clamping groove.

5. The endoscope according to any one of claims 1 to 4, wherein the handle is of a shell structure, the outer surface of the handle is of an irregular curved surface matched with a semi-fist-making gesture, a cylinder-like body for a thumb and an index finger to be buckled is formed at the top of the handle, and the cable connection port is arranged at the upper end of the cylinder-like body; the front part of the handle is provided with a front curved surface which gradually bulges forwards from top to bottom, the mirror tube joint is arranged at the outermost end of the front curved surface, the rear part of the handle is provided with a conical column extending from the palm center to the palm heel, the instrument inlet is arranged at the rear end of the conical column, and the instrument inlet is coaxial with the mirror tube joint; the bottom of the handle is provided with a lower curved surface which bulges downwards, and the lower curved surface is matched with a bearing contact surface formed by bending the middle finger, the ring finger and the tail finger; the priming inlet is disposed in a central position of the side of the handle.

6. The endoscope of claim 5, wherein the irrigation inlet is provided in two and is provided at left and right sides of the handle, respectively.

7. The endoscope of claim 6, wherein the irrigation inlet is configured with a water stop cap.

8. The endoscope of claim 7, wherein the handle is provided with a concave arc surface at a side center position, the perfusion inlet is arranged in the concave arc surface, and the height of the water stop cap is smaller than or equal to the concave depth of the concave arc surface.

9. The endoscope of claim 5, wherein a central axis of the cable connection port is perpendicular to a central axis of the instrument inlet.

10. The endoscope of claim 5, wherein a sealing plug is attached to the instrument inlet.