WO2019075707A1 - Large-channel endoscope for straight insertion - Google Patents

Abstract

A large-channel endoscope for straight insertion (100), comprising: an insertion portion (1). The insertion portion comprises an insertion tube (11) and a distal tip portion (12) secured on a front end of the insertion tube (11); and a handling portion (2), connected to the tail end of the insertion portion (1) and comprising a handle (22) and a hand grip (23) disposed at an angle to the handle (22). A device input port (25) is disposed at the rear end of the handle (22) of the handling portion (2). A device tube (35a) passes through the inside of the handle (22) and the lumen of the insertion tube (11). The transverse axis of the device input port (25) forms an acute angle with the transverse axis of the device tube (35a) in the handle of less than 15 degrees. Optical fibers in the large-channel endoscope (100) can extend from the device in port (25) through the device channel without bending, effectively avoiding damage to the fibers. Moreover, an increase in the inner diameter of the device tube (35a) enables two or more devices to be simultaneously inserted into the device tube (35a) to perform operation, thereby reducing surgery times, enhancing surgical efficiency, and conferring excellent practical utility.

Description

Large channel straight insertion endoscope Technical field

The present invention relates to the field of medical devices, and more particularly to a large-channel straight insertion endoscope.

Background technique

There are separate flexible ureteroscopes and rigid ureteroscopes in the field of medical devices. The rigid ureteroscope is easy to operate and can easily reach the renal pelvis through the ureter. However, because the front end of the rigid ureteroscope is inflexible, it can not enter the renal pelvis; while the soft ureteroscope soft nephrolithotomy is the urinary catheter entering the kidney and reaching the urinary system. In any position, non-invasively remove the kidney stones directly from the body. Surgical procedure: a ureteral rigidoscope was placed through the external urethra to detect no abnormalities in the bladder. A right ureteral orifice was found, a zebra guidewire was placed, and a soft-mirror-expanded sheath was placed under the guide of the zebra guidewire. Into the renal pelvis to the renal pelvis, explore the renal pelvis, found that the upper calculus, krypton laser and holmium laser combined crushing stones, soft stencil and three-claw pliers to remove part of the stone, suction under a vacuum suction part of the debris. The double "J" tube was placed and the operation was successfully completed. Safe and non-invasive, clean stone, greatly reduce the chance of recurrence while allowing patients to quickly recover health.

Application No. CN200920083433.2 Utility Model discloses a three-channel bendable steering soft and rigid combined endoscope, including a hard conduit, a soft conduit, a soft and hard conduit positioning device, an image mounted in a soft conduit, and an illumination source fiber. , a laser fiber/surgical instrument mounted in a flexible catheter, comprising a steering wire that controls the steering of the soft catheter within the flexible catheter, the soft catheter passing through the catheter connection block and the image and illumination source fiber channel, the laser fiber/surgical instrument channel, and the steering wire Channel connection, image and illumination source fiber is detachably mounted in the image and illumination source fiber channel through the fiber connection mechanism; the laser fiber/surgical instrument is detachably mounted in the laser fiber/surgical instrument channel through the fiber connection mechanism; The steering steering wire is connected to a curved steering control mechanism that is fixed in the steering wire passage. The utility model can fix the optical fiber and the surgical instrument in the endoscope, and obtain a stable image.

The invention of the application No. CN201110287464.1 provides a disposable two-channel endoscope sheath comprising a sheath consisting of a separate speculum cavity and an instrument channel, the front end of the instrument channel being open, the speculum cavity and There is also a dialing wire passage between the instrument passages, a dialing wire passes through the dialing wire passage and a part of the front and rear portions thereof are exposed to the dialing wire passage, and a dialing member is connected to the front end of the dialing wire; the dialing member is a roller member Or an inverted "concave" shaped wire member. The invention has the beneficial effects that the instrument head of the surgical instrument can be flexibly adjusted to realize the condition examination and the operation operation; the working length of the endoscope is adjustable, and the problem of inconvenient connection of the mirrors of different working lengths is solved; the water is fed before the operation The channel is filled with water to prop up the surgical site, and at the same time, the impurities in the surgical site are discharged through the drainage channel, so that the surgical field of view is clear and the operation is accurate; the invention is used in one-time use to avoid pollution, safety and hygiene.

The utility model with the application number CN201220143238.6 relates to a medical device. A multi-purpose endoscope includes a lens tube connected to a main body, a main body having a light guide insertion port and an observation system, and a sheath sheath attached to the lens tube casing, the sheath sheath including the sheath body and the sheath tube a water inlet is arranged on the sheath body, and a water injection channel in the inlet port mirror tube is connected, and a water flow regulating valve is arranged on the sheath body, and an instrument channel and an optical channel parallel to the water injection channel are arranged in the lens tube, wherein the instrument channel is another One end is connected to the instrument inlet and the water outlet on the main body through the main body. The utility model provides a multi-purpose endoscope which is automatic in the process of water circulation, can be used with a plurality of gravel systems, has good safety, can effectively alleviate the suffering of the patient, and solves the gravel process existing in the prior art. In the middle, the water cycle is inconvenient, and it cannot effectively alleviate the patient's pain and the technical problem of poor fit.

However, the endoscope according to the above prior art is susceptible to damage to the optical fiber when the optical fiber is inserted, and the internal dimensions of the instrument channel are limited, and it is impossible to simultaneously extend into two or more medical instruments through one instrument channel while performing the surgical operation. low efficiency.

Summary of the invention

The present invention discloses a large-channel straight-through endoscope comprising: an insertion portion including an insertion catheter and a distal end head fixed to the front end of the insertion catheter, the apex head being provided with an instrument catheter mounting channel for the insertion of the instrument catheter and Installing a camera module mounting channel of the camera module; the operating portion is connected to the end of the insertion portion by a rigid connecting member, including a handle and a handle at an angle to the handle, and the back end of the handle is provided with an interface socket for connecting the display device Wherein, the front end surface of the insertion end portion of the insertion portion is provided with an instrument outlet, and the rear end surface of the handle portion of the operation portion is provided with a corresponding instrument inlet, and the instrument inlet is connected via a device catheter which is inserted inside the handle and inserted into the lumen of the catheter. The angle between the section axis of the instrument inlet and the section axis of the instrument catheter in the handle is less than 15 degrees.

Further, the front end head is assembled by a multi-channel module base and a sleeve sleeved on the outer surface of the multi-channel module seat, and the multi-channel module base is formed by a plurality of concave channels on the outer circumferential surface. a cylindrical irregular body structure, the sleeve is a hollow cylinder having an inner diameter matching the outer diameter of the irregular body structure, and a plurality of concave shapes when the sleeve is sleeved on the outer circumferential surface of the multi-channel module seat The channel and the sleeve together form a plurality of fully enclosed channels that are open at both ends, and the plurality of fully enclosed channels that are open at both ends include at least the instrument catheter mounting channel and the camera module mounting channel.

Further, the front end surface of the front end head is further provided with a water outlet, and the lower end of the handle is provided with a water inlet base, and the water inlet base communicates with the water outlet through a water inlet conduit which is disposed inside the handle and inserted into the inner cavity of the conduit.

Preferably, the water inlet conduit and the instrument channel share the same closed channel with both ends open, and the water outlet and the instrument outlet are the same outlet disposed at the front end face of the tip end, the same closed channel with the open ends One end connected to The same outlet is connected to the other end with two branch pipes having a three-way valve shape, and the two branch pipes are respectively connected to the instrument inlet and the water inlet base.

Further, the camera module mounting channel is a square channel.

Preferably, the plurality of fully enclosed passages that are open at both ends further comprise an installation channel.

Preferably, the plurality of fully enclosed passages that are open at both ends further comprise a sensor member passage for mounting the pressure sensor.

Further, the outer casing of the operating portion is composed of an upper casing and a lower casing, and the upper casing and the lower casing are integrally formed.

Preferably, the handle is provided with a grip portion, and the grip portion comprises a plurality of anti-slip structures arranged at intervals.

As described above, the present invention relates to a large-channel straight-through endoscope, in which the optical fiber does not need to be bent during the process of extending from the instrument inlet into the instrument channel, and since the optical fiber itself is brittle and easy to fold, the optical fiber can be effectively prevented from passing through. When the angle between the instrument inlet and the instrument channel is bent, the fiber is damaged, and the present invention adopts a method of assembling an irregular body having a concave channel and a hollow cylindrical sleeve. The partition wall between the fully closed channels that are open at both ends can be made thin enough to increase the inner diameter of the instrument catheter while ensuring that the diameter of the front end surface of the endoscope head of the endoscope catheter is constant. Two or more instruments are simultaneously inserted into the instrument catheter for operation, which shortens the operation time, improves the operation efficiency, and has high practical value.

In order to make the above description of the present invention more comprehensible, the preferred embodiments will be described below in detail with reference to the accompanying drawings.

DRAWINGS

The invention will now be described with reference to the accompanying drawings.

1 is a schematic overall structural view of a large-channel straight-through endoscope disclosed in an embodiment of the present invention;

2 is a schematic view showing the overall structure of a tip end according to an embodiment of the present invention;

3 is a cross-sectional view of a front end face of a tip end head disclosed in an embodiment of the present invention;

4-1 is a schematic structural diagram of an irregular body constituting a tip end according to an embodiment of the present invention;

4-2 is a schematic structural view of a sleeve constituting a tip end according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a camera module of a front end head according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a light emitting unit of a front end head according to an embodiment of the present invention.

Detailed ways

The embodiments of the present invention are described below by way of specific embodiments, and those skilled in the art can readily understand other advantages and functions of the present invention from the disclosure of the present disclosure.

The exemplary embodiments of the present invention are now described with reference to the drawings, however, the present invention may be embodied in many different forms and not limited to the embodiments described herein. The invention is fully disclosed to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not intended to limit the invention. In the figures, the same elements/elements are given the same reference numerals.

Unless otherwise stated, the terms (including technical and scientific terms) used herein have the ordinary meaning of meaning to those skilled in the art. In addition, it is to be understood that terms defined in commonly used dictionaries should be understood as having a meaning consistent with the context of the relevant art, and should not be construed as an idealized or overly formal meaning.

As shown in FIG. 1 to FIG. 3, a first embodiment of the present invention discloses a large-channel straight-through endoscope 100, including:

The insertion portion 1 includes an insertion catheter 11 and a distal end head 12 fixed to the front end of the insertion catheter. The anterior end portion 12 is provided with an instrument catheter mounting passage 35 for inserting the instrument catheter 35a and a camera module mounting for mounting the camera module. Channel 14e;

The operating portion 2 is connected to the end of the insertion portion 1 by a rigid connecting member 21, comprising a handle 22 and a handle 23 at an angle to the handle, the rear end of the handle 23 is provided with an interface socket 24 for connecting the display device;

Wherein, the front end surface of the front end of the insertion portion 1 is provided with a device outlet 15, and the rear end surface of the handle portion of the operation portion is provided with a corresponding instrument inlet 25, and the instrument inlet 25 is passed through an instrument catheter which is inserted inside the handle and inserted into the lumen of the catheter. The mounting channel 35 is in communication, the angle of the section axis of the instrument inlet 25 being at an acute angle to the axis of the section of the instrument catheter 35a in the handle 22 is less than 5 degrees, or less than 8 degrees, or less than 10 degrees, or less than 15 degrees;

Specifically, as shown in FIG. 1, the rear end of the handle 22 is provided with a fixing seat 26 for fixing the instrument catheter 35a, and the central axis of the inlet section of the fixing seat 26 coincides with the sectional axis of the instrument inlet 25.

During use, the medical device is extended from the instrument inlet 25 into the instrument catheter 35a and then extends into the body of the human body by the instrument outlet 15, in the first embodiment of the invention, due to the cross-sectional axis of the instrument inlet 25 and the device in the handle 22. The acute angle of the section axis of the catheter 35a is less than 15 degrees. During the insertion of the medical device from the instrument inlet 25 into the instrument catheter 35a, the fiber does not need to be greatly bent, so that the slice sampling, minimally invasive surgery and laser are performed. When the gravel or the like needs to extend into the human body along the instrument channel of the endoscope, the bending of the instrument can be avoided, and the use range of the straight channel endoscope according to the first embodiment of the present invention is expanded. Taking the laser lithotripron as an example, in the operation of the laser lithotripsy operation, the large-channel straight-through endoscope of the first embodiment of the present invention is used in comparison with the prior art endoscope in which the instrument inlet is disposed on the side of the handle 22 The mirror enables the fiber to be bent from the instrument inlet 25 without substantial bending. Since the optical fiber itself is brittle and easy to fold, the fiber can be effectively prevented from being bent when the optical fiber passes through the corner between the instrument inlet 25 and the instrument guide 35a, thereby causing damage to the optical fiber.

Meanwhile, in the large-channel straight-through endoscope according to the first embodiment of the present invention, as shown in FIGS. 4-1 and 4-2, the front end head 12 can be set by the multi-channel module base 12a and the multi-channel module. The sleeve 12b of the outer circumferential surface of the seat is assembled. The multi-channel module seat 12a is a cylindrical irregular body structure formed by having a plurality of concave passages on the circumferential outer surface, and the sleeve 12b is an inner diameter and an irregular body. The outer cylinder of the outer diameter of the structure is adapted. When the sleeve 12b is sleeved on the outer circumferential surface of the multi-channel module seat 12a, the plurality of concave channels and the sleeve together form a plurality of fully closed channels with open ends. The plurality of fully enclosed passages open at both ends include at least the instrument catheter mounting passage 35 and the camera module mounting passage 14e.

Since the prior art process uses the mold forming method, it is necessary to ensure a certain wall thickness between the respective channels, and the whole of the front end head of the embodiment can be formed by laser cutting or wire cutting. The wall thickness can be made thinner, and the inner dimension of the instrument catheter can be greatly increased, so that the inner diameter of the instrument catheter can be greatly widened without increasing the diameter of the front end surface of the anterior head, thereby allowing two or A plurality of medical instruments simultaneously enter the human body through the large-sized instrument channel for surgical operation, further shortening the operation time and improving the efficiency of the operation. In the present embodiment, preferably, the outer diameter of the front end face of the apex head is less than or equal to 2.9 mm, and the inner diameter of the instrument catheter 35a is 1.4 mm.

Preferably, as shown in FIG. 3, the front end surface of the front end head 12 is further provided with a water outlet 17, and the lower end of the handle 22 is provided with a water inlet base 27 through which the water inlet base 27 is inserted through the inside of the handle and inserted into the lumen of the catheter. The water conduit 37 is in communication with the water outlet 17, the water inlet conduit 37 is isolated from the instrumentation conduit 35a, or the inlet conduit 37 shares a conduit with the instrumentation conduit 35a. In the case of bruising adhesion to the camera or the inner wall of the human body cavity; the liquid in the cavity is turbid, which reduces the visibility; or when the gravel or the like obstructs the imaging, the water can be injected into the human body through the water inlet conduit 37, and the water flows from the water outlet. In the human body, the blood, turbid liquid or gravel is washed away, so that the camera can clearly observe the inner wall of the human body cavity. If the water pressure is too high, or the gravel is finished, the catheter can be inserted through the catheter and the ureteroscope The passage between the outer sheaths is subjected to vacuum suction to drain excess water or stones from the body.

As shown in FIG. 3, when the water inlet conduit 37 and the instrument conduit 35a share the same conduit, the water outlet 17 and the instrument outlet 15 are the same outlet provided at the front end surface of the tip end portion 12, and the same conduit is connected at one end to The same outlet is connected to the other end with two branch pipes having a three-way valve shape, and the two branch pipes are respectively connected to the instrument inlet 25 and the water inlet base 27. The water inlet base 27 is located on the side of the handle 22 and is located on the same side of the handle 22 as the handlebar 23, so that during the draining process, when the operator holds the handlebar 22, under the action of gravity, with the water inlet base 27 Connected water pipes are Naturally downward, the water pipe will not bend at a large angle, the water flow will be smoother, and the water pipes will be neat and tidy, so as not to hinder the operation, so that the operator can simultaneously fill the handle 23 while filling the water.

Further, a water inlet valve 27a is provided at the rear end of the water inlet base, and the water inlet valve 27a switches the water inlet conduit 37, and the water inlet can be freely controlled according to actual use requirements, and the water inlet amount can be conveniently adjusted.

Specifically, as shown in FIG. 5, the camera module 14 includes an imaging unit 14a, a photosensitive chip unit 14b disposed at the bottom of the imaging unit 14a and connected thereto, and a chip printed circuit board assembly disposed at the bottom of the photosensitive chip unit 14b and connected thereto ( The English full name is Printed Circuit Board Assembly (PCBA) 14c and the cable set 14d connected to the chip PCBA14c. The camera module mounting channel is in the endoscope, and the light reflected by the target to be detected is imaged by the imaging unit 14a and transmitted to the photosensitive chip unit 14b, and the photosensitive chip unit 14b converts the optical image (ie, the optical signal) into an electrical signal. Chip PCBA 14c and cable set 14d conduct electrical signals to an external monitor or display for viewing by an operator. Specifically, the photosensitive chip unit 14b can adopt a charge coupled component (hereinafter referred to as a Charge Coupled Device, CCD for short) or a complementary metal oxide semiconductor device (Compoundary Metal Oxide Semiconductor, CMOS for short). Other chips capable of obtaining optical images and capable of converting optical images into electrical signals are used, and are not limited to charge coupled device CCD chips or complementary metal oxide semiconductor device CMOS chips.

As shown in FIG. 5, in the embodiment, the camera module mounting channel 14e is a square channel, and the imaging unit 14a and the photosensitive chip unit 14b mounted therein are square. Generally, the image quality of the photosensitive chip unit 14b directly affects the observation effect of the external monitor or the display. In this embodiment, the photosensitive chip unit 14bc is disposed at a position opposite to the camera behind the camera, and the imaging unit 14a and the photosensitive device The chip unit 14b is connected to the camera module mounting channel, which facilitates the operator to adjust the relative positions of the camera unit 14a and the sensor chip unit 14b for clearer imaging.

Further, as shown in FIGS. 2 and 4-1, a plurality of fully enclosed passages open at both ends further include a device mounting passage 16. The device mounting channel 16 can be equipped with a light source, or an auxiliary device such as a pressure sensor.

The light source in this embodiment adopts a modular light-emitting unit. As shown in FIG. 6, the light-emitting unit 16a includes a light-emitting element 16b such as a light-emitting diode or an LED. The printed circuit board is disposed at the bottom of the light-emitting element and connected thereto (English name: Printed Circuit Board) , referred to as PCB) 16c, and cable set 16d connected to PCB 802. In this embodiment, the LED lamp is preferably used as the light-emitting element 16b. The LED lamp has the advantages of small volume, long service life, high brightness, low heat, and the like, and further improves the efficiency of diagnosis and treatment and the accuracy of diagnosis and treatment. However, the present invention is not limited thereto, and any light-emitting member that can emit light can be used as a light source, such as an optical fiber, a light-emitting diode, or the like. The light-emitting unit 8 may be an LED lamp mounted on a flexible circuit board by using surface mount technology (English called Surface Mount Technology, SMT for short). The full name is called Flexible Printed Circuit (FPC), and then the flexible circuit board FPC is mounted on the front end of the endoscope end portion, and the flexible circuit FPC is connected to the power line in the endoscope. In the preferred embodiment, the latter installation method is preferably adopted, that is, the LED lamp is mounted on the front end portion of the end portion of the endoscope by the FPC method, and the LED lamp is mounted on the tip end portion of the endoscope by the FPC method. The front end can be mass-produced, which greatly improves the productivity and operational efficiency of the endoscope.

In practice, the traditional apex head should be considered for the welding of its internal components in assembly, which is prone to line short circuit and solder joint dropout, which affects the intended use and surgical effect of the product, and is likely to cause clinical adverse effects. The invention adopts modularization production of components such as the camera module 14 and the light-emitting unit 16a, and then assembles the assembly, thereby improving assembly efficiency and increasing product stability and safety.

Further, a printed circuit board 28 is fixedly disposed in the operation unit 2, and the camera module 14, the light-emitting unit 16a, the printed circuit board 28, and the interface socket 24 are sequentially connected by an electrical connection line. This allows for faster signal transmission, reduced image lag, and the ability to align the power and signal lines, greatly simplifying the line.

Preferably, the plurality of fully enclosed channels that are open at both ends further comprise a sensor member channel for mounting the pressure sensor. It is conceivable to those skilled in the art that the plurality of fully closed channels open at both ends of the embodiment are not limited to the present invention. The instrument catheter mounting channel, the camera module mounting channel, the device mounting channel, the inlet conduit mounting channel and the sensor device mounting channel indicated in the embodiment may also include other channels in the form of a plurality of openings, thereby having a strong universal Sex, expand the scope and function of the nephroscope to improve the surgical results.

Further, as shown in FIG. 1, in the present embodiment, the operating portion 2 includes a handle 22 and a handle 23 at an angle to the handle 22, and the handle 23 is connected to the handle from about a quarter of the rear end of the handle 22. 22 below, and the handlebar 23 extends along its own axis toward the rear lower side of the handle 22 such that the handlebar 23 forms an acute angle 29 with about a quarter of the handle 22 of the rear portion, the handle 22 and the handlebar as a whole. 23 into a pistol shape, the handlebar 23 corresponds to the barrel portion of the pistol, and the handle 22 corresponds to the handle portion of the pistol. The medical staff can conveniently hold the handlebar 23 during the operation, which is convenient for the medical staff to hold the hysteroscope. operating. Further, the handle 23 is further provided with a grip portion 29 formed by a plurality of protrusions, and the grip portion 29 includes at least one upper sliding blocking protrusion and at least one sliding blocking protrusion to increase the friction force of the handle 23 to prevent The function of sliding.

In this embodiment, the water inlet base 27 is located on the side of the handle 22 and is located on the same side of the handle 22 as the handle 22, such as below the handle 22 in FIG. 1, so that during the draining process, when the operator holds the hand At 23 o'clock, under the action of gravity, the water pipe connected to the water inlet base 27 is naturally downward, and the water pipe does not bend at a large angle, and the water flow is more For smoothness, the water pipes will be neat and tidy, and will not hinder the operation, so that the operator can simultaneously fill the handle 23 while filling the water.

Further, in order to facilitate the assembly, in the present embodiment, the handle 23 of the operating portion 2 is made of all-steel material, and the weight of the entire endoscope is reduced under the premise of ensuring the quality, which is more compact and economical. In addition, the outer casing of the operating portion 2 is composed of two parts, an upper casing and a lower casing, and the two parts are provided with mutually cooperating connecting members. When the assembling operation is completed in the operating portion 2, the two parts are assembled and covered. can. Further, the upper shell and the lower shell of the operating portion 2 are integrally formed separately, and the processing is simple and convenient, and the production cost is low, so that it can be used as a straight channel surgical consumable, and can be discarded after use, thereby eliminating secondary pollution and not being The patient is under financial stress.

In the embodiment of the present invention, the entire tip end portion 12 is made of a metal material. The traditional apex head is made of plastic (such as polymer material). Therefore, when forming the mounting channel of the camera module, the mold is formed during processing. It is necessary to ensure that the internal dimensions of the mounting channel of the wall thickness camera module are greatly affected. Limit, so that the size and pixels of the camera placed therein are greatly limited, and a good camera effect cannot be obtained. The tip end head 100 of the embodiment is entirely made of a metal material, so that the camera module mounting channel can be formed by laser cutting, the wall thickness can be made thinner, and the internal dimension of the camera module mounting channel is greatly increased, so that It is possible to apply a higher-pixel chip on the market to an endoscope, and the sharpness of photography is higher in clinical surgical treatment, thereby reducing the accidental injury of the krypton laser to the inside of the human body (for example, the surface of the renal pelvis, the ureter, and the like). It improves the efficiency of laser lithotripsy and further shortens the operation time. The material of the tip end of the embodiment is not limited to a metal material, and may be other materials that can perform the same function as ceramics or rigid plastics.

In summary, the large-channel straight-through endoscope according to the present invention does not need to be bent during the process of extending the optical fiber from the instrument inlet into the instrument catheter, and the optical fiber itself is easy to be brittle and easy to fold, so that the optical fiber itself can be effectively and easily The optical fiber is prevented from being bent when the optical fiber passes through the corner between the instrument inlet and the instrument tube, and the present invention adopts a method of assembling an irregular body having a concave channel and a hollow cylindrical sleeve. The partition wall between the plurality of fully closed channels that are open at both ends can be made thin enough to increase the diameter of the instrument catheter while ensuring that the diameter of the front end surface of the tip end of the endoscope catheter is constant. The inner diameter can be used for two or more instruments to be inserted into the instrument catheter at the same time, which shortens the operation time, improves the operation efficiency, and has high practical value.

In addition, the above-described embodiments of the present invention are merely illustrative of the principles of the present invention and its effects, and are not intended to limit the present invention. Modifications or variations of the above-described embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and scope of the invention are still covered by the appended claims.

Claims (8)

A large-channel straight-through endoscope, comprising: The insertion portion includes an insertion catheter and a distal end head fixed to the front end of the insertion catheter, the front end portion being provided with an instrument catheter mounting passage for inserting the instrument catheter and a camera module mounting passage for mounting the camera module; The operating portion is connected to the end of the insertion portion by a rigid connecting member, and includes a handle and a handle at an angle to the handle, and the rear end of the handle is provided with an interface socket for connecting the display device; Wherein the front end surface of the insertion end portion of the insertion portion is provided with an instrument outlet, and the rear end surface of the handle portion of the operation portion is provided with a corresponding instrument inlet, and the instrument inlet is inserted through the inside of the handle and the insertion The instrument catheter of the catheter lumen is in communication with an angle of the section of the instrument inlet that is less than 15 degrees from the acute axis of the section axis of the instrument catheter in the handle. The endoscope according to claim 1, wherein the front end portion is assembled by a multi-channel module base and a sleeve sleeved on a circumferential outer surface of the multi-channel module holder, The channel module holder is a cylindrical irregular body structure having a plurality of concave passages on a circumferential outer surface, the sleeve being a hollow cylinder having an inner diameter matching the outer diameter of the irregular body structure, when When the sleeve is sleeved on the circumferential outer surface of the multi-channel module holder, the plurality of the inner concave passages and the sleeve together form a plurality of fully closed passages open at both ends, and the plurality of the two ends The fully enclosed passage of the opening includes at least the instrument catheter mounting channel and the camera module mounting channel. The endoscope according to claim 2, wherein a front end surface of the front end portion is further provided with a water outlet, and a lower end of the handle is provided with a water inlet base, and the water inlet base is disposed through the water inlet An interior of the handle and the inlet conduit of the insertion conduit lumen communicate with the water outlet. The endoscope according to claim 3, wherein said water inlet conduit and said instrument passage share the same closed-end passage that is open at both ends, and said water outlet and said instrument outlet are disposed at One end of the front end face of the front end head, one end of the same closed end open-ended passage communicates with the same outlet, and the other end is connected with two branch pipes having a three-way valve shape, the two branch pipes Connected to the instrument inlet and the water inlet base, respectively. The endoscope according to claim 1, wherein the camera module mounting channel is a square channel. The endoscope of claim 1 wherein a plurality of said fully enclosed passages open at both ends further comprise a sensor member passage for mounting a pressure sensor. The endoscope according to claim 1, wherein the outer casing of the operating portion is composed of an upper casing and a lower casing, and the upper casing and the lower casing are integrally formed. The endoscope according to claim 1, wherein the handle is provided with a grip portion, and the grip portion includes a plurality of anti-slip structures in which the protrusions are alternately arranged.

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