CN114831585A - Disposable sheath for endoscope and endoscope assembly - Google Patents

Abstract

The invention relates to the field of medical instruments, in particular to a disposable sheath for an endoscope and an endoscope assembly. The sheath comprises a sleeve which can be sleeved on the insertion part of the endoscope in a pluggable manner, and the rear end of the sleeve is provided with a fluid interface, a treatment instrument insertion hole and a connecting structure. The front end of the sleeve is provided with a transparent end wall, and the end wall is provided with a fluid outlet and a treatment instrument outlet. The tube wall of the sleeve is provided with a fluid channel for communicating the fluid port with the fluid outlet and a treatment instrument channel for communicating the treatment instrument outlet with the treatment instrument insertion opening. In the endoscope assembly, the sleeve is sleeved on the insertion part in a pluggable manner. Therefore, the sheath is a disposable product, and the problem of cross infection caused by incomplete disinfection is effectively prevented. Meanwhile, the fluid channel and the treatment instrument channel are arranged on a disposable product, and the light guide body and the camera are kept on the insertion part of the reusable endoscope, so that the cost is greatly reduced, and the inspection cost is also reduced.

Description

Disposable sheath for endoscope and endoscope assembly

Technical Field

The invention relates to the technical field of medical instruments, in particular to a disposable sheath for an endoscope and an endoscope assembly.

Background

The endoscope can enter the human body through a natural pore canal. Since a lesion which cannot be displayed by X-ray can be seen by an endoscope, it is very useful for a doctor. For example, with the aid of an endoscopist, an ulcer or tumor in the stomach can be observed, and an optimal treatment plan can be developed accordingly.

An endoscope on the market is holistic, and inside the portion of inserting need stretched into human body when the inspection, need wash the disinfection to the portion of inserting when diagnosing different patients, and it is thorough to hardly disinfect after repetitious used, and then leads to cross infection easily.

In order to solve the problem of cross infection, the insertion portion may be a disposable product which is detachable, and the insertion portion needs a turning mechanism, a light guide, an image pickup device, and the like, so that the cost of the disposable insertion portion is high, and the inspection cost is high.

Disclosure of Invention

Technical problem to be solved

The invention solves the technical problem that the existing endoscope can not simultaneously avoid cross infection and has low cost.

(II) technical scheme

In order to achieve the purpose, the invention adopts the main technical scheme that:

in one aspect, the present invention provides a disposable sheath for an endoscope, comprising a sleeve capable of being removably fitted over an insertion portion of the endoscope, the sleeve having opposite front and rear ends. At least the front part of the sleeve is a flexible body, and the axis of the pipe hole of the sleeve deviates from the axis of the sleeve. The rear end of the sleeve is provided with a fluid interface, a treatment instrument insertion opening and a connecting structure which can be detachably connected with the endoscope. The front end of the sleeve is provided with a transparent end wall, and a fluid outlet and a treatment instrument outlet are arranged on the end wall; a fluid channel for communicating the fluid interface with the fluid outlet is arranged in the pipe wall of the sleeve; the tube wall of the sleeve is provided with a treatment instrument channel which communicates the treatment instrument outlet with the treatment instrument insertion opening.

According to the invention, the connecting structure is a clamping structure, and the rear end of the sleeve is provided with an insertion direction indicating mark.

According to the invention, the clamping structure is a clamping head, and a plurality of clamping heads are arranged around the axis of the sleeve; or the clamping structure is a clamping hole, and a plurality of clamping holes are arranged around the axis of the sleeve.

According to the present invention, the sleeve includes a tube body opened at both ends and a transparent cap fixed to a front end of the tube body to constitute an end wall of the sleeve.

According to the invention, the rear end of the sleeve is configured in a shape which is tapered in the direction away from the front end of the sleeve.

According to the invention, the rear end of the sleeve is a joint, and the part of the sleeve except the rear end is a flexible circular tube.

According to the present invention, the rear end of the sleeve is further provided with a suction port which communicates with the treatment instrument outlet via the treatment instrument channel, or the end wall of the front end of the sleeve is further provided with a suction port and the wall of the sleeve is provided with a suction channel which communicates the suction port with the suction port.

According to the present invention, the fluid interface includes a fluid interface for air supply and a fluid interface for water supply; the fluid outlet comprises a water-gas nozzle, and a nozzle of the water-gas nozzle faces the outlet direction of the pipe hole; the fluid channel includes a water vapor jetting fluid channel which connects the air supply fluid port and the water supply fluid port with the water vapor nozzle.

According to the present invention, the fluid interface includes a fluid interface for attaching water; the fluid interface comprises a fluid outlet for attaching water; the fluid passage includes a water-attaching fluid passage that communicates the water-attaching fluid port and the water-attaching fluid outlet.

Another aspect of the present invention provides an endoscope assembly including an endoscope having an insertion portion having an image pickup device and a light guide body, the endoscope assembly including the disposable sheath for an endoscope of any one of the above; the endoscope is provided with a connecting matching structure, and the connecting matching structure is detachably connected with the connecting structure.

(III) advantageous effects

The invention has the beneficial effects that:

the disposable sheath for the endoscope and the sheath in the endoscope assembly are disposable products, can well seal the insertion part of the endoscope, completely separate the human body from the insertion part of the endoscope, and can effectively prevent the problem of cross infection caused by incomplete disinfection. Meanwhile, compared with the prior art that the whole insertion part with the turning structure, the light guide function structure, the imaging function structure, the fluid conveying structure and the instrument insertion structure is used as a disposable product, the invention separates the components of the endoscope imaging function and the turning function from the structure which is easy to cause cross infection and is used for conveying fluid and the instrument insertion function, and arranges the fluid channel and the treatment instrument channel in the sheath, but the sheath does not comprise the turning structure, the light guide function structure and the imaging function structure, namely the turning structure, the light guide function structure and the imaging function structure are reserved on the insertion part of the endoscope which is repeatedly used, so the cost is greatly reduced, and the inspection cost is further reduced.

Drawings

FIG. 1 is a schematic front view of a sheath in an endoscope assembly according to an embodiment;

FIG. 2 is a schematic top view of the sheath of FIG. 1;

FIG. 3 is a schematic front view of an endoscope in an endoscope assembly according to an exemplary embodiment;

fig. 4 is a schematic front end view of an endoscope assembly according to an embodiment.

[ description of reference ]

1: an insertion portion; 2: a sleeve; 3: a connecting structure; 4: an end wall; 5: a light guide; 6: a camera; 7: a tube hole; 8: a treatment instrument inlet; 9: a treatment instrument outlet; 10: a pipe body; 11: a transparent cap; 12: a joint; 13: an aspiration adaptor; 14: a fluid port for air supply; 15: a fluid port for water supply; 16: a water-air nozzle; 17: a fluid port for attaching water; 18: a fluid outlet for the additional water.

Detailed Description

For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings. Herein, the "front" and "rear" are referred to as being oriented such that the side closer to the human body in use is "front".

Referring to fig. 1 to 4, the present embodiment provides an endoscope assembly including an endoscope (shown mainly in fig. 3) and a disposable sheath (shown mainly in fig. 1 and 2, hereinafter simply referred to as "sheath").

Referring to fig. 3, the endoscope has an insertion portion 1, and a front portion of the insertion portion 1 is a flexible portion for insertion into a human body. The insertion portion 1 has a light guide 5 and an image pickup device 6 therein. The light guide 5 transmits light from the light source of the endoscope to the distal end of the insertion portion 1, and facilitates the doctor to provide sufficient brightness during diagnosis and treatment. The camera 6 takes real-time images of the human body and transmits the real-time images of the human body to the display, so that a doctor can observe images of an operation part in the human body in real time. Set up two light conductors 5 in this embodiment, two light conductors 5 are isosceles triangle with camera 6 and arrange, and two light conductors 5 are located two base angles. The structures of the light guide 5 and the camera 6 and the connection relationship with other structures are conventional, and the steering structure for controlling the steering of the insertion portion 1 is also conventional and will not be described again. In particular, the handle of the endoscope has a coupling mating structure thereon for detachable connection to the sheath. The endoscope is a reusable device.

Referring to fig. 1 to 4, the sheath includes a sleeve 2 capable of being insertably fitted over an insertion portion 1 of the endoscope, the sleeve 2 having a circular tube hole to accommodate the insertion portion 1. Before treatment, the sleeve 2 is fitted to the circular insertion portion 1 of the endoscope, i.e., the insertion portion 1 is inserted into the tube hole 7 of the sleeve 2. After the treatment is completed, the cannula 2 is pulled out from the insertion part 1 and discarded. Thus, the sheath is a single use only product.

Specifically, the sleeve 2 has two ends including opposite front and rear ends, and the rear end of the sleeve 2 is open and can be fitted over the insertion portion 1 from the rear to the front. At least the front part of the sleeve 2 is a flexible body to cooperate with the flexible part of the front part of the insertion part 1 to curve together in the human body. And the outer wall of the cannula 2 is in the shape of a revolution for the convenience of the doctor.

The rear end of the sleeve 2 is provided with a connecting structure 3 which can be detachably connected with the endoscope, and the connecting structure 3 is detachably connected with a connecting matching structure on the endoscope after the sleeve 2 is sleeved on the insertion part 1 of the endoscope, so that the sleeve 2 is formed, namely, the sheath is detachably connected with the endoscope, and thus, after the sleeve is used for one patient, the sheath can be detached from the endoscope.

In the present embodiment, the connection and matching structure is provided on the handle of the endoscope, but may be provided at other positions of the endoscope as long as the connection and matching structure is not inserted into the human body during the diagnosis and treatment. Preferably, the connection structure 3 is a snap-fit structure, and an insertion direction indication mark is provided at the rear end of the sleeve 2, so that the snap-fit of the connection structure 3 and the connection matching structure is smoothly formed. In the present embodiment, as shown in fig. 1, the locking structure is four locking holes disposed around the axis of the sleeve 2, and correspondingly, the connection matching structure is four locking heads. Of course, the clamping structure can also be a clamping head (such as a clamping spring), and the connecting and matching structure is a clamping hole. In addition, the locking bar can be clamped. The clamping structure is convenient to insert and pull out, low in manufacturing cost and suitable for one-time connection.

The front end of the sleeve 2 has a transparent end wall 4, and the end wall 4 abuts the front end face of the insertion section 1 of the endoscope. In this way, light propagation and imaging of the light guide 5 and the camera 6 can be performed through the end wall 4, which facilitates illumination observation and image data acquisition, etc., without interfering with observation of the inside of the human body by the doctor.

In the present embodiment, the sleeve 2 includes a tube body 10 with both ends open and a transparent cap 11, the transparent cap 11 is fixed to the front end of the tube body 10 to constitute the end wall 4 of the sleeve 2, and the transparent cap 11 is preferably made of transparent resin, whereby the transparent end wall 4 is obtained due to the provision of the transparent cap 11 in the present embodiment. In this embodiment, the tube 10 may be transparent, non-transparent, or translucent. Of course, in other embodiments, the front end of the sleeve 2 may be an integral part, and the front end of the sleeve 2 is transparent as a whole.

Further, the pipe 10 is a rotary body, and may be a circular pipe with an equal outer diameter or a circular pipe with a non-equal outer diameter. In the present embodiment, the rear end of the tube body 10 forms a joint 12, and the joint 12 is configured in a shape that is tapered toward a direction away from the front end of the sleeve 2 so as to be connected to the handle of the endoscope. The connector 12 may be integrally formed with other tubular structures or may be fixedly connected thereto. For example, the joint 12 may be made of a hard material or a flexible material, which facilitates the connection operation with the endoscope, for example, the joint may be made of ABS, TPU or PVC, the portion of the tube body 10 other than the joint 12 may be a flexible circular tube, and the portion of the tube body 10 other than the joint 12 may be made of a flexible medical material, such as TPU or PVC.

In the case of the joint 12, the inner diameter of the pipe body 10 excluding the joint 12 is in the range of 6.3 to 11.5mm, and the outer diameter is in the range of 7.3 to 13.8 mm. In the absence of the joint 12, the entire pipe body 10 has an inner diameter in the range of 6.3 to 11.5mm and an outer diameter in the range of 7.3 to 13.8 mm. Of course, in general, the front portion of the cannula (i.e. at least the portion intended for insertion into the human body) has an inner diameter in the range of 6.3-11.5mm and an outer diameter in the range of 7.3-13.8 mm.

Further, an air supply fluid port 14 and a water supply fluid port 15 are provided in the joint 12, and a water vapor nozzle 16 is provided in the end wall 4, and the nozzle of the water vapor nozzle 16 is directed toward the outlet of the pipe hole 7, so that the fluid ejected from the water vapor nozzle 16 moves toward the end wall portion corresponding to the light guide 5 and the camera 6. The pipe wall of the casing 2 is provided with a water vapor discharge fluid passage for communicating the air supply fluid port 14 and the water supply fluid port 15 together with the water vapor nozzle 16. If only water is supplied to the water supply fluid connector 15, water is sprayed out from the water vapor nozzle 16 through the water vapor spraying fluid channel, so that the parts of the end wall 4 corresponding to the light guide 5 and the camera 6 can be washed, and the parts of the end wall 4 corresponding to the light guide 5 and the camera 6 are prevented from being contaminated by foreign matters to influence the image acquisition; if only air is supplied to the air supply fluid interface 14, the air is sprayed out from the water vapor nozzle 16 through the water vapor spraying fluid channel to blow water drops on the parts, corresponding to the light guide body 5 and the camera 6, of the end wall 4; if air is supplied to the air supply fluid port 14 and water is supplied to the water supply fluid port 15, the air and the water are mixed in the water vapor discharge fluid passage and the water vapor mixture is discharged from the water vapor nozzle 16. Of course, in other embodiments, the air supply fluid outlet and the water supply fluid outlet may be provided separately on the end wall 4, and a separate fluid channel may be provided on the pipe wall of the sleeve 2 to communicate the air supply fluid port 14 and the air supply fluid outlet, and to communicate the water supply fluid port 15 and the water supply fluid outlet. Alternatively, the air supply fluid port 14 and the water supply fluid port 15 may be combined into one fluid port.

Further, a fluid port 17 for additional water is provided in the joint 12 of the sleeve 2, a fluid outlet 18 for additional water is provided in the end wall 4, the fluid outlet 18 for additional water is directed directly in front of the sleeve 2, and a fluid passage for additional water is provided in the wall of the sleeve 2 to communicate the fluid port 17 for additional water with the fluid outlet 18 for additional water. When water is supplied to the fluid port 17 for water supply, the mucus in the chamber can be washed.

Further, a treatment instrument insertion port 8 is provided in a joint 12 of the sleeve 2, the treatment instrument insertion port 8 faces directly in front of the sleeve 2, a treatment instrument outlet 9 is provided in the end wall 4, and a treatment instrument channel for communicating the treatment instrument outlet 9 with the treatment instrument insertion port 8 is provided in a tube wall of the sleeve 2, and this arrangement allows an endoscopic treatment instrument to pass therethrough, thereby realizing a sampling function.

Further, a suction port 13 is arranged on the joint 12 of the cannula 2, the suction port 13 is communicated with the outlet 9 of the treatment instrument through the channel of the treatment instrument, the negative pressure suction function is realized, and redundant liquid in the cavity is extracted. In other embodiments, a separate suction port may be provided on the end wall 4, and a separate suction channel communicating the suction port with the suction port 13 may be provided in the tube wall of the cannula 2.

In the present embodiment, the additional water supply fluid port 17, the air supply fluid port 14, the water supply fluid port 15, and the treatment instrument insertion port 8 are arranged in the front-to-rear direction and are positioned on the same straight line, the suction port 13 is positioned on the side of the treatment instrument insertion port 8, and the suction port 13 is directly connected to the treatment instrument insertion port 8.

In the present embodiment, the axis of the tube hole 7 of the sleeve 2 is offset from the axis of the sleeve 2 (i.e., the axis of the cylinder surrounded by the outer circumferential surface of the sleeve 2), specifically, the axis of the tube hole in the tube body 10 is offset from the axis of the tube body 10 (i.e., the axis of the cylinder in which the outer circumferential surface of the tube body 10 is located), so that the tube wall of the tube body 10 is uneven in thickness in the same cross section, the treatment instrument outlet 9 on the end wall 4 corresponds to a thicker region in the tube body 10, and the additional water fluid outlet 18 and the water vapor nozzle 16 are respectively located on both sides of the treatment instrument outlet 9. With such an arrangement, the size of the front end of the sheath can be reduced as much as possible under the condition that the normal use of each fluid outlet, the treatment instrument outlet 9, the light guide body 5 and the camera 6 is ensured, the operation on a human body is facilitated, and the discomfort of the human body is reduced.

Thus, in this embodiment, the sheath is a disposable product, which can seal the insertion portion 1 of the endoscope well, completely isolate the human body from the insertion portion 1 of the endoscope, and effectively prevent cross-infection caused by incomplete sterilization. Meanwhile, compared with the prior art in which the whole insertion part with the turning structure, the light guide function structure, the imaging function structure, the fluid conveying structure and the instrument insertion structure is used as a disposable product, the present embodiment separates the components of the light guide function, the endoscope imaging function and the turning function from the structures of the water feeding function, the air feeding function and the instrument insertion function which easily cause the cross infection problem, and arranges the fluid channel and the treatment instrument channel in the disposable sheath, and the sheath does not include the light guide body 5, the camera 6 and the turning structure which are high in cost, namely, the light guide body 5, the camera 6 and the turning structure are retained in the endoscope and the insertion part 1 thereof for repeated use, so that the cost is greatly reduced, and the inspection cost can also be reduced.

At the same time, when the suction function is set, the related structure is also set in the shield, reducing the risk of cross-infection. And the interfaces and outlets of all the channels are arranged on the protective cover, so that on one hand, the problem of conduction failure caused by separate arrangement can be avoided, and on the other hand, cross infection is completely avoided. Of course, in this embodiment, a plurality of fluid channels with different functions and corresponding interfaces and outlets are provided, and these structures can be selectively provided in other embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. A disposable sheath for an endoscope, comprising a sleeve (2) that can be fitted over an insertion portion (1) of the endoscope in an insertable manner, the sleeve (2) having opposite front and rear ends;

at least the front part of the sleeve (2) is a flexible body, and the axis of the pipe hole (7) of the sleeve (2) deviates from the axis of the sleeve (2);

the rear end of the sleeve (2) is provided with a fluid interface, a treatment instrument insertion opening (8) and a connecting structure (3) which can be detachably connected with the endoscope;

the front end of the sleeve (2) is provided with a transparent end wall (4), and a fluid outlet and a treatment instrument outlet (9) are arranged on the end wall (4);

a fluid channel for communicating the fluid interface with the fluid outlet is arranged in the pipe wall of the sleeve (2);

a treatment instrument channel for communicating the treatment instrument outlet (9) with the treatment instrument insertion opening (8) is arranged in the tube wall of the sleeve (2).

2. The disposable sheath for an endoscope according to claim 1,

the connecting structure (3) is a clamping structure, and the rear end of the sleeve (2) is provided with an insertion position indication mark.

3. The disposable sheath for an endoscope according to claim 2,

the clamping structure is a clamping head, and a plurality of clamping heads are arranged around the axis of the sleeve (2); or

The clamping structure is a clamping hole, and a plurality of clamping holes are formed around the axis of the sleeve (2).

4. The disposable sheath for an endoscope according to claim 1,

the sleeve (2) comprises a tube body (10) with two open ends and a transparent tube cap (11), wherein the transparent tube cap (11) is fixed on the front end of the tube body (10) to form the end wall (4) of the sleeve (2).

5. The disposable sheath for an endoscope according to claim 1,

the rear end of the sleeve (2) is configured in a shape that is tapered in a direction away from the front end of the sleeve (2).

6. The disposable sheath for an endoscope according to claim 1 or 5,

the rear end of the sleeve (2) is provided with a joint (12), and the part of the sleeve (2) except the rear end is a flexible round pipe.

7. The disposable sheath for an endoscope according to claim 1,

the rear end of the sleeve (2) is also provided with a suction interface (13), the suction interface (13) is communicated with the treatment instrument outlet (9) through the treatment instrument channel, or the end wall (4) at the front end of the sleeve (2) is also provided with a suction port, and a suction channel for communicating the suction port with the suction interface (13) is arranged in the tube wall of the sleeve (2).

8. The disposable sheath for an endoscope according to claim 1,

the fluid interface comprises a fluid interface (14) for air supply and a fluid interface (15) for water supply;

the fluid outlet comprises a water-gas nozzle (16), and the nozzle of the water-gas nozzle (16) faces the outlet direction of the pipe hole (7);

the fluid channel includes a water vapor discharge fluid channel which communicates the air supply fluid port (14) and the water supply fluid port (15) with the water vapor nozzle (16).

9. The disposable sheath for an endoscope according to claim 1,

the fluid interface comprises a fluid interface (17) for attaching water;

the fluid interface comprises a fluid outlet (18) for the additional water;

the fluid passage includes a water-supply fluid passage that communicates the water-supply fluid port (17) and the water-supply fluid outlet (18).

10. An endoscope assembly comprising an endoscope having an insertion portion (1), the insertion portion (1) having therein an image pickup device (6) and a light guide body (5), characterized by comprising the disposable sheath for an endoscope of any one of claims 1 to 9;

the insertion part (1) can be inserted into a pipe hole (7) of the sleeve (2) in a pluggable mode, the end wall (4) is adjacent to the front end face of the insertion part (1), a connection matching structure is arranged on the endoscope, and the connection matching structure is detachably connected with the connection structure (3).

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