WO2004047626A1

WO2004047626A1 - Endoscope assembly with disposable sheath

Info

Publication number: WO2004047626A1
Application number: PCT/CN2003/000760
Authority: WO
Inventors: Kerang Jiang
Original assignee: Jiang, Shoumei
Priority date: 2002-11-22
Filing date: 2003-09-08
Publication date: 2004-06-10
Also published as: CN100337579C; CN1697624A; AU2003261638A1; CN1486667A

Abstract

An endoscope assembly with a disposable sheath, in which the open conduits of a conventional endoscope body are cancelled. The head of the endoscope is capsulized or reshaped and is covered by a isolated sheath (6), a elastomeric end cap (10) is provided outside the isolated sheath (6) to join the open conduits shifted out from the conventional endoscope body. The external diameter of the endoscope assembly does not enlarge therefore. The isolated sheath (6) and the external open conduits are disposed after use so that the endoscope assembly can be sterilized entirely. The present invention is used in all sorts of flexible and rigid magical endoscopes.

Description

Endoscope system with disposable sheath

The invention is an improvement on the traditional medical endoscope and solves the problem of disposable sterilization, and proposes a complete endoscope system with a disposable sheath, which belongs to the technical field of medical equipment and is suitable for clinical use in hospitals. Background technique

Medical endoscopes can directly observe intra-cavity lesions and biopsies, and perform minimally invasive surgery. They not only provide evidence for diagnosis, but also can remove lesions and eradicate diseases. They have become an irreplaceable important technology in the field of modern medicine. However, the iatrogenic infections that can occur during the endoscopy cannot be ignored, especially the possibility of accidents such as the transmission of hepatitis and AIDS through blood and body fluids. It is indeed worrying! In recent times, many small medical devices have been modified as much as possible For single use, to completely solve the problem of disinfection. However, medical endoscopes cannot be used for one time because of their high cost. However, as an interventional instrument, disinfection is indeed a major problem. In recent years, high-temperature and high-pressure sterilization has been applied to new rigid endoscopes. Service life), but various flexible mirrors cannot withstand high temperature and high pressure disinfection at all, especially the various open channels in endoscopes are more difficult to thoroughly clean and disinfect. In view of this, since the 1990s, people at home and abroad have begun to explore solutions. Among them, there are three U.S. patents (patent numbers: 5, 025, 778; 5, 483, 951, and 5) that are closer to the present invention. , 876, 329), each of which has its own characteristics, but they are not easy to implement. For example, the US Patent No. 5,025, 778 gives the schematic structure of various embodiments: the structure shown in Figure 2B It is a full-opening open tube outside the sleeve, but because the open end of the open tube 54 is open, it is easy to scratch the body cavity mucosa; the open tube 54 shown in FIG. 8 is the opposite, and the full tube is closed. For a long curved body cavity pipe, the pipe may be punctured during the process of inserting the instrument; and US Patent No. 5,483,951 discloses a semi-cylinder lens body structure and patent US patent No. 5,876, 329 axial C-shaped endoscope lens body structure, the common defects of the two flexible lenses are difficult to manufacture, because the flexible lens needs to bend and turn, the non-cylinder of free bending " Bone "is not easy to make,

The cost of the sheath is also high, which will definitely affect the sales and use of the product in the market, so it has not been promoted in the market so far. Various other patent documents are far from the content of this patent. Summary of the Invention

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, to substantially improve the structure of the traditional endoscope, and to provide an endoscope system with a disposable sheath. Cylindrical body of endoscope Under the premise that the endoscope is easily contaminated and difficult to clean and disinfect, the open pipes are removed from the endoscope body, thereby compressing the outer diameter of the special endoscope in the system, and only the front end of the head Reduction and modification, in the clinical application, an isolation cuff that is suitable for the shape of the endoscope is put on. Finally, the space made by the special endoscope described above due to the shrinkage of the head is used to remove the above from the endoscope body. Each of the removed open ducts is fixed to the head of the endoscope that has been covered with an isolation cuff through an elastic end cap. The connection of each soft open duct and the elastic end cap can be through a respective thin metal tube; the elastic end cap is A cylindrical body with a D-shaped lens head slot and a metal thin-walled socket at the front of each open pipe, but the slots and sockets are reduced to a certain depth to ensure the front of the lens and each The front end of the metal thin-walled tube of the open pipe is a certain distance from the front end surface of the elastic end cap; because the endoscope lens body has been protected by an isolation cuff, after the entire system is used, the isolation cuff and the openings outside the cuff only need to be Ducts and elastic end caps connected to them and The nozzles are replaced at one time, so that the endoscope lens body is completely free from pollution, and the disinfection is reliable, convenient and practical, and it is beneficial to promote.

Based on the idea of moving the various susceptible ducts from the original endoscope body to the outside of the isolation cuff with the endoscope body, the head of the endoscope in the system of the present invention The front end does not need to be modified, that is, the original ordinary cylinder is maintained. This is very important for the use of the original traditional endoscope. At this time, the open tube can be directly bonded to the outside of the isolation cuff, and the mouth of the front end of the open tube The edges can be welded linearly and superficially coaxially with the periphery of the front end of the cuff to temporarily close the open duct opening. In addition, a soluble plug can also be used to temporarily block the opening at the front end of the open pipe. At this time, when the open pipe enters the body cavity with the endoscope-isolated cuff, the opening of the open pipe is temporarily closed or soluble. The hemispheric head of the plug is in front and cannot scratch the body cavity mucous membrane. When the device reaches the working site, it will only work when the seal is temporarily closed or the soluble plug is pulled out to work. The non-toxic soluble plug introduced can be dissolved in the body. If the open pipe needs to be used as a suction, a slightly hard suction pipe can be inserted when the pipe reaches the suction site after entering the body cavity. The suction pipe can also be used as an operation pipe at the same time, which can make the pipe open. The front end can slide back and forth, which is beneficial to place the suction tube in the field of view of the observation system for suction, and see the suction process more clearly.

The technical solution of the present invention includes a lens body, a mouth tube, and an isolation cuff made of a transparent and tough material. The isolation cuff is placed on the lens body without any open duct inside, and is arranged on the outside of the isolation cuff. There are elastic end caps that connect each open pipe as a whole. The shape of the head of the lens body can be modified by compression. For example, the end face given in the present invention has a "D" shape structure, that is, a truncated wedge shape is made only on the head of a cylindrical body, and the end face Form a D-shape; while other endoscopes may not be modified, only no open channels are provided in the endoscope body, thereby also compressing the outer diameter of the lens body and maintaining the original ordinary cylindrical shape so as to be in the isolation sleeve. Various surgical instruments such as cannulas are set outside the capsule; this type of isolation sleeve can also be used for existing traditional endoscopes with various open channels built in The bladder and the open pipe are used for one-time disinfection, but the diameter of the lens body is slightly larger; the rear part of the lens body can be provided with a water injection and gas injection hand valve and a pump body according to needs: the water injection and gas injection hand valve is provided for use Originally, the facilities and considerations of the handle of the lens body were only partially improved on the traditional endoscope. The hand valve for water injection and gas injection was not provided to better prevent water and gas from contamination that may occur in the event of backflow. The rear end of the water-injection and gas-injection pipe can be connected with a syringe or a single-use dedicated water-injection and gas-injection machine through a joint, instead of the original multiple-use water-injection and gas-injection machine in the chassis; the endoscope lens body at this time is due to The large open ducts are eliminated, and the diameter of the lens body is greatly compressed. It is only composed of the observation system (objective lens, eyepiece, image beam or CCD, etc.), light transmission system, directional control system, foreskin, etc .; The front end surface of the objective lens of the lens body should be higher than other front end surfaces of the lens body, so that the front end surface of the objective lens and the inner surface of the front end of the isolating cuff are closely fitted to prevent stray light from entering.

The shape of the head of the isolation cuff is similar to the shape of the head of the lens body, and its size is suitable to be appropriately inserted into the lens body, and the rear part is looser than the lens body. The length depends on hygiene requirements and can be placed near the handle. You can also wrap the handle completely, and the isolation cuff made of transparent and tough material should ensure that the virus and bacteria cannot pass through.

The various open pipes in the system of the present invention can be connected with the elastic end cap through a thin metal tube with a thin front end and a sleeve, and the slope of the front end and the D-shaped end face forming the head of the mirror body are the same. The metal thin-walled tube is arranged on the elastic end cap according to a certain position, and the rear part is connected with the respective flexible tube. The rear end of the operation hole pipe is provided with a jaw and a suction joint (that is, a shunt tube). For those with double clamp channels (dual-operating-hole tubes), the proximal end of one of the tubes is connected to the instrument socket, and the other is connected to the suction head; The end can be connected to the shunting head. Instrument operation and suction can be performed in one pipe at the same time. The proximal end of the water injection and gas injection pipe can be connected to the water injection and gas injection hand valve on the endoscope handle, and it can also be connected to the syringe. Can be connected to a dedicated single-use water pump air pump, they are filled with water or gas (nozzle outlet points to the objective lens in the front face of the isolation cuff), but the latter can better prevent water and gas The resulting pollution. The isolation cuff, various open pipes, elastic end caps, and shunt heads of the system of the present invention are replaced after use, and are only used for one-time use. The relatively expensive endoscope lens body is protected by the isolation cuff. Disinfection can be used safely, which improves the use efficiency and life of the lens body.

Compared with the prior art, the beneficial effects of the endoscope system with a disposable sheath of the present invention are as follows-In order to solve the problem of thorough disinfection of medical endoscopes, the open pipe in the endoscope is moved outside the body, which is convenient for one-time use . In 1991, U.S. Patent No. 5,025,778 has a total of 24 structural figures, expressing a variety of methods to achieve the method of moving the open tube in the endoscope body to the outside of the body, Fig. 2A, 2B and Fig. 8 and the present invention Fig. 8- The content of 2 is similar, but there are substantial differences:

1) U.S. Patent No. 5,025,778 (see Figure 2B) The operating hose is opened at the front end of the sheath The mouth is open and consists of a double-layered material. Such a mouth is set next to the lens. When the head of the lens body is swung and turned, the mucosa of the body cavity is easily scratched. The entire open pipe in Figure 2A and Figure 8 is closed. The device shown in FIG. 10 must be used to open it, because the pipe is in the curved cavity of the human body along with the mirror body. The process of opening will cause the pipe to be punctured. In the embodiment of the present invention, only the front edge of the open pipe is temporarily closed or temporarily blocked with a soluble plug to avoid scratching the body cavity mucous membrane when the lens is swung. It is a soft round tube. The open duct of the present invention is closed both at the edge of the opening and at the lumen; neither is it fully open or fully closed. This is the essential difference from said US patent. When in use, use a closed biopsy forceps to enter the open pipe to open the edge of the opening or push the plug. Each open pipe outside the mirror body is made of a hose and enters the narrow space of the body cavity. It can be squeezed when there is nothing in the pipe. In fact, the outer diameter can be reduced.

2) U.S. patents (patent numbers: 5,483, 951 and 5, 876, 329) propose two types of lens body structures: axial semi-cylindrical lens body and C-shaped lens body. In order to free up the space required for the mouth pipe outside the mirror body, but both have changed the cylindrical mirror body, the common disadvantage is that the bendable turning part of the non-cylindrical mirror body is difficult to manufacture, which is inconvenient for popularization and application. The present invention only deforms the front end of the endoscope lens body, so that the head side is regarded as a truncated wedge shape, forming a D-shaped front end surface, to make room for the front head of each external open pipe, and through the elastic end The cap realizes the cylindrical shape of the front end of the system, which is easy to insert; and all the mirror bodies (including the bendable turning part) at the back are still cylindrical, and there is no difficulty in making the bendable part of the rear mirror because of the deformation of the head. For easy promotion and application. Compared with the U.S. patent, the characteristics of the open pipe of the present invention are as follows: the opening edge of the front end of the pipe is temporarily closed or blocked with a soluble plug, and when used, it is opened or closed with a closed biopsy forceps. Even if the body cavity is scratched due to the open end of the front end, there is no danger of puncture due to the long closed lumen being broken open. The remaining part of the open pipe is still in the shape of a round tube with elastic software. It will not scratch the mucosa due to the open opening of the pipe during use, and it will not cause the danger of rupturing the pipe and cavity due to the open pipe. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a head of a flexible endoscope system with a disposable sheath according to the present invention.

FIG. 2A is a schematic diagram of the structure of an endoscope lens in a US patent (patent number 5, 025, 778).

FIG. 2B is a schematic structural diagram of another embodiment of an endoscope lens of the US patent (Patent No. 5,025, 778). FIG. 2C is a schematic structural diagram of a compressed D-shaped endoscope body head in FIG. 1.

FIG. 3 is a schematic structural diagram of the head of the isolation cuff in FIG. 1.

FIG. 4 is a structural schematic view of the open ducts and the elastic end caps integrated in FIG. 1. 5 is a cross-sectional view of the elastic end cap in FIG. 1.

Fig. 6 is a structural diagram of the whole system of an embodiment of the present invention, which shows that the rear end of the water injection and gas injection pipe is connected with the relevant outlet of the handle part of the mirror body.

FIG. 7 is a schematic diagram of a whole system for connecting a water injection gas injection tube with a syringe and the like and wrapping the back of a cuff according to the present invention. FIG. 8 is a schematic structural diagram of another embodiment of an endoscope lens in the US patent (Patent No. 5,025, 778). Fig. 8-2 is a schematic diagram of the front edge of the open duct next to the isolation cuff temporarily closed in accordance with another embodiment of the present invention (the shape of the lens head is a generally cylindrical shape).

Figure 9 is an axial view of the isolation cuff and the open duct opening temporarily closed as shown in Figure 8-2.

FIG. 10 is a schematic structural diagram of another embodiment of an endoscope lens in the US patent (Patent No. 5,025, 778). Figure 10-2 is the outline drawing of the soluble plug of the present invention.

FIG. 11 is a schematic diagram of a front end opening of an open pipe of the present invention temporarily blocked by a soluble plug.

FIG. 12 is an axial schematic view with a soluble plug shown in FIG. 11.

FIG. 13 is a schematic structural diagram of a water injection gas injection pipe and a nozzle according to an embodiment of the present invention.

FIG. 14 is a schematic diagram of inserting another open pipe into an open pipe according to an embodiment of the present invention.

In the figure: 1 is the endoscope lens body; 2 is the slope of the D-shaped end surface forming the head of the lens body; 3 is the front surface of the objective lens; 4 is the front surface of the lighting system; 5 is the inclined surface of the head of the isolation cuff; 6 is isolation Cuff; 7 is the front end surface of the isolation cuff; 8 is a thin-walled metal tube; 9 is a water injection and gas injection tube; 10 is an elastic end cap; 11 is a lens head opening of the elastic end cap; 12 is an inner end of the elastic end cap 13 is the socket of the opening pipe; 14 is the slot of the lens head; 15 is the operation pipe; 16 is the nozzle; 17 is the rear connector of the water injection and gas injection tube; 18 is the lens connector of the water injection and gas injection tube; 19 is the head after operating the pipe; 20 is the suction joint; 21 is the rubber head; 22 is the instrument insertion port; 23 is the water injection gas injection hand valve; 24 is the open pipe holder; 25 is the syringe; 26 is the soluble plug; 27 The front end of the open pipe is temporarily closed; 28 is another open pipe in the open pipe; 29 is a surgical instrument; 30 is a surgical instrument handle; wherein: the open pipe includes a water injection gas injection pipe 9 and an operation pipe 15. detailed description

The specific technical solution of the present invention is further described in detail below with reference to the drawings:

As shown in Figs. 1 to 5, the endoscope system with a disposable sheath of the present invention includes a lens body 1 (Fig. 2C) and various open pipes such as a water injection and gas injection pipe 9, an operation pipe 15, and an endoscope system. An isolation cuff 6 (FIG. 3) made of transparent and tough material is also provided. The isolation cuff 6 is sleeved on the mirror body 1 without any open ducts inside. The air pipe 9 and the operation pipe 15 are connected to form an elastic end cap 10 (Figure 5). Fig. 1 shows that, since various open ducts, such as water injection and gas injection ducts 9 and operation ducts 15 that are susceptible to contamination of the endoscope, are taken out of the scope 1, the diameter of the endoscope 1 is compressed, and the front end of the head is compressed. Retraction and remodeling. In clinical applications, an isolation cuff 6 adapted to the shape of the endoscope is put on, and the D-shaped end slope of the head of the lens body is formed by compressing and deforming the endoscope lens. 2. The head of the isolation cuff. In the space vacated by the inclined surface 5, various thin water-injection and air-injection tubes 9 and metal thin-walled tubes 8 in the operation tube 15 can be placed in the original lens body, and fixed at the front end of the endoscope through the elastic end cap 10, each opening The metal thin-walled pipes 8 of the pipes are connected to the flexible water and gas injection pipes 9 and the operation pipes 15 at the back, and perform their respective functions. At this time, the total circumference of the endoscope system is not larger than the original endoscope diameter. The human body cavity is soft tissue. The scope 1 of the present invention is connected to the previous open channels inside the scope. Even if it is not a complete cylinder, it will not increase the lateral pressure of the body cavity. When passing through the narrow part of the body cavity Collapsed while saving space. The endoscope system shown in Figure 1 is a schematic diagram of a high-performance electronic colon endoscope with double clamp channels and large forceps. The long axis of the cross section is slightly larger than the corresponding original electronic colon without being squeezed by the cavity. The diameter of the endoscope is smaller than that of the original electronic colon endoscope after squeezing, and the short-axis dimension of the cross section of the lens body is much smaller than the diameter of the original electronic colon endoscope; FIG. 2C shows that the front end of the head of the lens body 1 Compression and modification, the front end is "D" shape, the endoscope lens body 1 at this time only by the observation system (objective lens, eyepiece, image beam or CCD, etc.), light transmission system, direction control system and foreskin In other configurations, the water injection and gas injection pipes 9 and the operation pipes 15 which occupy a large space are eliminated, and the diameter of the mirror body 1 is greatly compressed. The front surface 3 of the objective lens 1 of the lens body 1 is higher than other parts of the front surface of the lens body 1 so that the front surface 3 of the objective lens and the inner surface 7 of the front end of the isolation cuff are closely fitted to prevent stray light from entering. Capsule 6 is designed to protect the endoscope body 1. It is made of highly transparent, tough, non-toxic and impermeable to viruses and bacteria (such as medical transparent polyvinyl chloride). The shape of the head 5 and The deformed head shape 2 of the mirror body 1 is matched, and its size is suitable to be moderately inserted. The rear part is looser than the mirror body. The length depends on the requirements. It can be placed near the handle or the handle can be completely wrapped; As is known from FIG. 4, each open pipe is a water injection and gas injection pipe which is eliminated in a conventional endoscope lens body. 9. The operation pipe 15 is composed of a metal thin-walled tube 8 at the front end and an elastic end cap 10. The thin-walled tubes 8 at the front end and the D-shaped end face forming the head of the lens body are aligned with the bending degree (curve as they bend), and are inserted into the elastic end caps 10, and the rear parts are connected to the respective flexible tubes. The shape of the elastic end cap 10 is a short cylinder (Figure

5), there are sockets 13 for water injection and gas injection pipes 9, operation pipes 15 (or through metal thin-walled pipes 8), and sockets 14 of the deformed endoscope lens section, but the sockets and sockets are at a certain depth Cannot continue to be inserted inside, which is limited by the smaller aperture of the lens head 11 of the elastic end cap and the end of the opening 12 of the open pipe in the elastic end cap. The cover of the elastic end cap 10 closely fits the front end surface 7 of the isolation cuff 6 and the end surface 3 of the objective lens without stray light. The nozzle 16 is the outlet of the water injection gas injection pipe 9 and is used for flushing the lens and supplying air. FIG. 6 shows the whole system working condition of the water injection and gas injection pipe 9 and the water injection and gas injection hand valve 23, and FIG. 7 shows the whole system operation of the water injection and gas injection pipe 9 connected to the syringe 25 and the back of the cuff, as shown in FIGS. 6 to 7 As shown, the rear part of the endoscope can be provided with or without a water injection and gas injection hand valve 23, and a water injection and gas injection hand valve 23 is provided to facilitate the use of the original hand valve and the water injection and gas injection equipment in the chassis; The water-injection and gas-injection hand valve 23 is provided to better prevent water and air pollution that may occur in the event of backflow. If no water injection and gas injection hand valve 23 is provided, the rear end interface 17 of the water injection and injection pipe 9 can be connected to a syringe 25 or a single-use dedicated water injection and injection pump, instead of the original water injection injection in the chassis, which is used repeatedly.气机构。 Gas institutions. Similarly, the rear end of the operation pipe 15 in the open pipe is provided with an insertable instrument such as a rubber head 21 and an instrument insertion port 11 and an operation pipe rear head 19 connected to the suction joint 20 and performing a shunt function, and respectively processed as follows: ① The head 19 (ie, the shunt tube) of the clamp channel and the operation pipe is shown in Figs. 6 and 7. The instrument insertion port 22 is provided at the opening of the rubber head 21, which serves as a seal to prevent air leakage during suction and water leakage during operation. . The suction joint 20 can be connected to a suction machine, etc., the in and out equipment and suction operation can be performed simultaneously or separately; ② the rear end interface 17 of the water injection and injection pipe 9 can be connected with the water injection and injection hand 23 of the original lens handle The water injection and gas injection tube lens body interface 18 at the proximal end of the lens body handle is connected; the water injection and gas injection hand valve 23 may not be provided, and two water injection and gas injection syringes 25 are connected, and the rear part of the lens body and the open pipe is also provided with As a buckle of the open pipe holder 24, the various pipes in the middle and the rear are better tied together with the mirror body.

Fig. 8-2, Fig. 9, Fig. 10-2, Fig. 11 to Fig. 14 are descriptions of another embodiment of the present invention. The principle is still as described above, and it is a cylindrical endoscope for which the head is not modified. The proposed endoscope can be applied to a new type of endoscope without various opening pipes such as water injection gas injection tube 9 and operation tube 15 inside the mirror body 1. Each water injection gas injection tube 9 and operation tube 15 is moved to the outside of the isolation cuff 6, In order to prevent the frontal opening from scratching the body cavity mucosa and applying a temporary superficial closed mouth 27 or temporary plugging with a soluble plug 26, when the front of the lens body reaches the working site, it is necessary to perform the operation through the operation of the pipe 15, The temporarily closed mouth 27 or the soluble plug 26 can be opened and closed with the closed biopsy forceps head. The nozzle 16 shown in FIG. 13 is a portion where the front end surface 3 of the objective lens is directed toward the inner surface of the isolation cuff 6. When necessary, the pressure can be injected to the corresponding part of the front end surface 7 of the isolation cuff 6 through the pressure of the water injection and injection handle 23 or the syringe 25 at the rear end of the water injection and injection tube 9.

14 is a schematic view showing that the present invention removes the rubber head 21 in the operation pipe 15 and inserts it into another open pipe 28. The other open pipe 28 can move forward and backward in the operation pipe 15 as an attraction. When the tube is placed, the suction site can be placed in the field of vision, the suction can still be performed in the same tube as the endoscopic surgery, and the surgical instrument 29 is controlled by the handle 30 at the rear.

This embodiment is also suitable for the use of the existing traditional endoscope, and is more convenient, except that the diameter of the isolation cuff 6 is correspondingly larger, because there are various open ducts in the lens body at this time. Such as water injection gas pipe 9, Operating duct 15; The present invention is also suitable for all rigid endoscope applications, such as used in laparoscopy, arthroscopy, etc., only covering the working length with a transparent elastic cuff 6 that is strong in elasticity and slightly smaller in diameter . The cover is spared and set in the form of a condom so that it can be tightened on the outside of the mirror body 1 to protect the mirror body from contamination. For the implementation of the above-mentioned various methods, the isolation cuff 6, the water injection and gas injection pipes 9, the operation pipes 15 and various external accessories must be replaced at one time after use, and harmlessly treated, thereby achieving a medical endoscope. Purpose of single use.

Claims

Claim

1. An endoscope system with a disposable sheath, which places each open pipe inside the scope of a conventional endoscope outside the scope, and is characterized in that the scope is not changed when the scope is a cylinder Next, the opening at the front end of the opening tube provided outside the isolation cuff is coaxially attached to the periphery of the front end of the isolation cuff, and the edge of the front edge of the mouth tube is temporarily closed, and the edge of the closed tube will be closed when the instrument reaches the working position open.

2. The endoscope system with a disposable sheath according to claim 1, characterized in that: without changing the lens body to a cylinder, the opening at the front end of the opening pipe provided outside the isolation cuff Soluble plugs can be used for temporary plugging. When the system reaches the working site, the device pushes out the soluble plugs.

3. The endoscope system with a disposable sheath according to claim 1, wherein: without changing the cylindrical shape of the endoscope, only the head of the endoscope is retracted. Or it can be modified, put on an isolation cuff, and connect the mirror body and each open pipe at the head of the system as a whole.

4. The endoscope system with a disposable sheath according to claim 3, characterized in that: when the end surface of the head of the endoscope lens body is formed in a D-shape, the opening is opened through an elastic end cap provided outside the cuff. The front of the tube is fixed to the front end of an endoscope that has been covered with an isolation cuff.

5. The endoscope system with a disposable sheath according to claim 3, characterized in that: the elastic end cap is cylindrical outside, and a D-shaped lens head slot and an open pipe are arranged inside. Jack.

6. The endoscope system with a disposable sheath according to claim 3, characterized in that: a metal thin-walled tube and a socket of the elastic end cap are sleeved in the front part of each open pipe.

7. The endoscope system with a disposable sheath according to claim 3, characterized in that: an open pipe can be inserted into the open pipe.

8. The endoscope system with a disposable sheath according to claim 3, wherein the front end surface of the objective lens of the lens body is slightly higher than the other end surfaces.

9. The endoscope system with a disposable sheath according to claim 3, characterized in that: the proximal end of the water injection gas injection pipe in the open pipe outside the cuff is isolated from the water injection injection in the traditional lens body system The gas valve is connected to the pump.

10. The endoscope system with a disposable sheath according to claim 3, characterized in that: the proximal end of the water and gas injection pipe in the open pipe outside the cuff is isolated from a syringe or a dedicated disposable valve Connected to the pump.

11. The endoscope system with a disposable sheath according to claim 3, characterized in that the cuff is isolated The front end of the water and gas injection pipe in the external open pipe is connected to the nozzle, and the nozzle is directed to the front face of the observation system in the isolation cuff.

12. The endoscope system with a disposable sheath according to claim 3, characterized in that: the operation hole pipe in the open pipe outside the isolation cuff and the proximal end of the suction pipe are respectively provided with instrument insertion and suction When the operation hole pipe and the suction pipe are one pipe, a diverter head is set at the proximal end of the pipe.

13. The endoscope system with a disposable sheath according to claim 1, characterized in that: an isolation cuff made of a tough elastic transparent material is used for various endoscope bodies without opening ducts to be tightened in The outer surface of the mirror body.