CN219481016U - Catheter device for endoscopic treatment - Google Patents

Abstract

The application provides a catheter device for endoscopic treatment, comprising: a connector, a conduit, a suction tube and a flow control switch. The connecting piece is provided with a first channel and a second channel. One end of the conduit is connected with the connecting piece, and the other end of the conduit is provided with a first inlet and a second inlet. The endoscope treatment accessory can enter the catheter through the first inlet and extend out of the second channel so as to treat the endoscope treatment accessory; the catheter is provided with an outlet and two inlets, and the negative pressure suction device can be communicated with the second inlet through the suction pipe so as to suck liquid in a human body through the catheter, so that the suction of the negative pressure suction device and the treatment of the endoscopic treatment accessory are not mutually interfered, and meanwhile, the suction of the negative pressure suction device and the treatment of the endoscopic treatment accessory are simultaneously carried out, thereby avoiding the influence of the liquid on the treatment of the endoscopic treatment accessory and ensuring the treatment effect of the endoscopic treatment accessory.

Description

Catheter device for endoscopic treatment

Technical Field

The application relates to the technical field of medical equipment, in particular to a catheter device for endoscopic treatment.

Background

The digestive tract endoscope minimally invasive surgery has the advantages of small trauma and high surgery efficiency, and has unique advantages in early tumor minimally invasive surgery of the digestive tract. In minimally invasive surgical procedures, in order to achieve a good field of operation, the operator needs to aspirate fluids or blood at the surgical site in time to fully expose the field of view and the manufactured operating space, and then extend the therapeutic device into the human body for treatment. At present, the digestive tract endoscope minimally invasive surgery is a single working channel, which is a suction channel and a therapeutic device extending into the channel, so that the simultaneous liquid suction and treatment cannot be realized, the operation efficiency is low, and the treatment effect is poor.

Disclosure of Invention

The utility model aims to provide a catheter device for endoscopic treatment, which has the advantages of simple structure, convenient use and good treatment effect.

To achieve the above object, the present application provides a catheter device for endoscopic treatment, for use with an endoscope, an endoscopic treatment accessory, and a negative pressure suction device, comprising: the connecting piece is provided with a first channel and a second channel which are parallel to each other, the first channel and the second channel penetrate through the connecting piece, and the first channel is configured to be matched with an endoscope for use; a conduit having one end connected to the connector and in communication with the second passageway, the other end of the conduit having a first inlet configured for use with an endoscopic treatment accessory such that the endoscopic treatment accessory can extend into the conduit and a second inlet; a suction tube having one end connected to one end of the conduit and communicating with the second inlet, the other end of the suction tube being configured to be connected to a negative pressure suction device; and a flow control switch fixed on the suction tube, the flow control switch being configured to control on-off of the suction tube.

A catheter device for endoscopic treatment as described above, wherein said catheter comprises: one end of the main pipe is connected with the connecting piece, and the other end of the main pipe is provided with the first inlet; and one end of the side pipe is connected with the main pipe and is obliquely arranged relative to the main pipe, and the other end of the side pipe is provided with the second inlet.

The catheter device for endoscopic treatment as described above, wherein the main tube includes a first tube section and a second tube section that are sequentially disposed, the first tube section is connected to the connector, and an axis of the first tube section intersects an axis of the second tube section.

The catheter device for endoscopic treatment as described above, wherein the main tube includes: the first sub-pipe is connected with the connecting piece; the second sub-pipe is detachably connected with the first sub-pipe, the side pipe is connected with the second sub-pipe, and the second sub-pipe and the side pipe are of an integrated structure.

The catheter device for endoscopic treatment as described above, wherein the catheter device for endoscopic treatment further comprises: a fixation device having a third channel therethrough, the fixation device being secured at the first inlet of the catheter and the third channel being in communication with the first inlet, the fixation device being configured to be secured to a handle of an endoscope.

The catheter device for endoscopic treatment as described above, wherein the catheter device for endoscopic treatment further comprises: and the sealing cover is detachably arranged at the other end of the guide pipe and seals the first inlet.

A catheter device for endoscopic treatment as described above, wherein said sealing cap comprises: a first body having a first through hole therethrough, one end of the first through hole being in communication with the first inlet; the first cover body is detachably arranged at the other end of the first main body and seals the other end of the first through hole; the first through hole comprises a first hole section and a second hole section which are communicated, the diameter of the first hole section is larger than that of the second hole section, and the second hole section is communicated with the first inlet.

A catheter device for endoscopic treatment as described above, wherein said sealing cap comprises: the second main body is provided with a second through hole penetrating through the second main body, one end of the second through hole is communicated with the second inlet, the second main body is elastic, and the aperture of the second through hole is smaller than that of the guide pipe; and the second cover body is detachably arranged at the other end of the second main body and seals the other end of the second through hole.

The catheter device for endoscopic treatment as described above, wherein the flow control switch is provided with a clip groove, and the flow control switch can be clipped to the endoscope through the clip groove.

The endoscopic catheter device as described above, wherein said flow control switch is detachably connected to said aspiration tube.

Compared with the prior art, the technical scheme has the following advantages:

the endoscope treatment accessory can enter the catheter through the first inlet and extend out of the second channel so as to treat the endoscope treatment accessory; the catheter is provided with an outlet and two inlets, and the negative pressure suction device can be communicated with the second inlet through the suction pipe so as to suck liquid in a human body through the catheter, so that the suction of the negative pressure suction device and the treatment of the endoscopic treatment accessory are not mutually interfered, and meanwhile, the suction of the negative pressure suction device and the treatment of the endoscopic treatment accessory are simultaneously carried out, thereby avoiding the influence of the liquid on the treatment of the endoscopic treatment accessory and ensuring the treatment effect of the endoscopic treatment accessory. In addition, the first channel and the second channel are parallel, the liquid sucking direction and the extending direction of the endoscope treatment accessory are approximately coincident with the direction of the lens in the endoscope, the irradiated part of the lens is basically consistent with the part to be treated, the operation error and the operation risk caused by the inconsistent parts are avoided, and the treatment effect of the endoscope treatment accessory is ensured.

In addition, the flow control switch is used for adjusting the flow area of the suction pipe so as to adjust the suction force of the negative pressure suction device and adapt to the requirements of different operation scenes on the liquid suction speed; the novel portable electronic device has the advantages of being simple in structure, convenient to operate and wide in application range, improving the use comfort of products, and further improving the market competitiveness of the products.

Drawings

The following drawings are only for purposes of illustration and explanation of the present application and are not intended to limit the scope of the present application. Wherein:

FIG. 1a is a schematic view of a first embodiment of an endoscopic therapeutic catheter device according to the present application;

FIG. 1b is a schematic view of the structure shown in FIG. 1a in partial cross-section;

FIG. 2a is a schematic view of a second embodiment of an endoscopic therapeutic catheter device according to the present application;

FIG. 2b is a schematic cross-sectional view of the structure of FIG. 2 a;

FIG. 3 is an enlarged schematic view of the portion A of FIG. 2 b;

FIG. 4 is an enlarged schematic view of the portion B of FIG. 2B;

FIG. 5 is a schematic view of a second embodiment of an endoscopic therapeutic catheter device as described herein;

FIG. 6 is a schematic view of a third embodiment of an endoscopic therapeutic catheter device according to the present application;

FIG. 7 is a schematic cross-sectional view of the structure of FIG. 6;

FIG. 8 is an enlarged schematic view of the portion C of FIG. 7;

FIG. 9 is a schematic view of a fourth embodiment of an endoscopic therapeutic catheter device according to the present application;

FIG. 10 is a schematic cross-sectional view of a first embodiment of a seal cap as described herein;

FIG. 11 is a schematic cross-sectional view of a second embodiment of a seal cap as described herein.

Reference numerals illustrate:

10. a connecting piece; 11. a first channel; 12. a second channel; 13. a groove; 14. a baffle plate;

20. a conduit; 21. a first inlet; 22. a second inlet; 23. a main pipe; 24. a side pipe; 25. a first pipe section; 26. a second pipe section; 27. a first sub-tube; 28. a second sub-tube;

30. a suction tube;

40. a flow control switch; 41. a body; 411. a mounting groove; 412. a clamping groove; 42. a pressing assembly; 421. a pressing member; 422. an elastic member;

50. a fixing device; 51. a third channel;

60. sealing cover; 61. a first body; 62. a first cover; 63. a first through hole; 631. a first bore section; 632. a second bore section; 64. a second body; 65. a second cover; 66. a second through hole;

70. an endoscope; 71. a lens;

80. negative pressure suction means.

Detailed Description

The present application is further described in detail below by way of the accompanying drawings and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other. The following discussion provides various embodiments of the present application. Although each embodiment represents a single combination of applications, different embodiments of the application may be substituted or combined, and therefore the application is also considered to include all possible combinations of the same and/or different embodiments described. Thus, if one embodiment comprises A, B, C and another embodiment comprises a combination of B and D, then the present application should also be considered to include embodiments comprising one or more of all other possible combinations comprising A, B, C, D, although such an embodiment may not be explicitly recited in the following. In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.

As shown in fig. 1a to 9, the catheter device for endoscopic treatment provided in the present application for use with an endoscope 70, an endoscopic treatment accessory (not shown in the drawings), and a negative pressure suction device 80 includes: connector 10, conduit 20, suction tube 30, and flow control switch 40.

As shown in fig. 1a and 1b, the connector 10 has a first channel 11 and a second channel 12 parallel to each other, the first channel 11 and the second channel 12 each extend through the connector 10, and the first channel 11 is configured to cooperate with an endoscope 70.

One end of the catheter 20 is connected to the connector 10 and communicates with the second channel 12, and the other end of the catheter 20 has a first inlet 21 and a second inlet 22, the first inlet 21 being configured for use with an endoscopic treatment accessory so that the endoscopic treatment accessory can extend into the catheter 20. In addition, the number of the first inlet 21 and the second inlet 22 may be plural, and one skilled in the art may select the corresponding number of the first inlet 21 and the second inlet 22 as needed.

One end of the suction tube 30 is connected to one end of the conduit 20 and communicates with the second inlet 22, and the other end of the suction tube 30 is configured to be connected to a negative pressure suction device 80.

A flow control switch 40 is secured to the suction tube 30, the flow control switch 40 being configured to control the on-off of the suction tube 30.

The present application provides a catheter device for endoscopic treatment wherein an endoscopic treatment accessory is capable of entering the catheter 20 through the first inlet 21 and protruding from the second channel 12 for the endoscopic treatment accessory to perform a treatment. The catheter 20 has an outlet and two inlets, and the negative pressure suction device 80 can be communicated with the second inlet 22 through the suction pipe 30 to suck the liquid in the human body through the catheter 20, so that the suction of the negative pressure suction device and the treatment of the endoscopic treatment accessory are not interfered with each other, and meanwhile, the suction of the negative pressure suction device 80 and the treatment of the endoscopic treatment accessory can be performed simultaneously, thereby avoiding the influence of the liquid on the treatment of the endoscopic treatment accessory and ensuring the treatment effect of the endoscopic treatment accessory.

In addition, the first channel 11 and the second channel 12 are parallel, the direction of liquid suction and the extending direction of the endoscope treatment accessory are approximately coincident with the direction of the lens in the endoscope 70, the part irradiated by the lens is basically coincident with the part to be treated, the operation error and the operation risk caused by the inconsistency of the parts are avoided, and the treatment effect of the endoscope treatment accessory is ensured.

In addition, the flow control switch 40 is used to adjust the flow area of the aspiration tube 30 to adjust the suction force of the negative pressure aspiration device 80 to meet the requirements of different surgical scenes on the aspiration liquid speed. The novel portable electronic device has the advantages of being simple in structure, convenient to operate and wide in application range, improving the use comfort of products, and further improving the market competitiveness of the products.

As shown in fig. 2a to 3, in one embodiment of the present application, a groove 13 is provided at the front end of the connector, the first channel 11 and the second channel 12 are in communication with the groove 13, a baffle 14 is provided at the front end of the connector 10 and is located in the groove 13, and the baffle 14 is interposed between the first channel 11 and the second channel 12.

In this embodiment, the baffle plate 14 is a flange, the baffle plate 14 protrudes in the front direction with respect to the first channel 11 and the second channel 12, the baffle plate 14 has an arc shape, and the concave portion of the arc-shaped baffle plate 14 faces the first channel 11 side.

After the baffle plate 14 is arranged, the liquid entering through the groove 13 flows to the side of the second channel 12 under the action of negative pressure, so that the phenomenon that the liquid is accumulated on the side of the first channel 11 to influence the visual field of the lens of the endoscope 70 is avoided.

In a specific embodiment of the present application, as shown in fig. 1b, the front end of the endoscope 70 is provided with the lens 71, in order to ensure the effective field of view of the lens 71, especially to reduce the damage to the gastrointestinal mucosa caused by the front end of the connector 10 being located at the side of the second channel 12, it is necessary to ensure that the lens 71 can see at least that the front end of the connector 10 is located at the side of the second channel 12, so in this embodiment, the angle β between the end edge of the groove 13 and the lens 71 with respect to the axis of the endoscope 70 is less than or equal to 70 degrees, and since the angle α between the field of view of the lens 71 of the commonly used endoscope 70 is 140 degrees, it is sufficient to ensure that the end edge of the groove 13 is within the field of view of the lens 71, and the angle β between the end edge of the groove 13 and the lens 71 with respect to the axis of the endoscope 70 is less than or equal to 70 degrees.

It should be noted that there is a difference in the viewing angle α of the lens 71 of the endoscope 70 of different models. In order to ensure that the lens 71 can see the position of the front end of the connector 10 on one side of the second channel 12, a vertical distance H between the end edge of the groove 13 of the connector 10 and the plane of the lens 71 of the endoscope 70 is calculated according to the included angle β, where the vertical distance H is the length of the front part of the connector 10 on the side of the groove 13, which provides a dimension parameter for manufacturing the connector 10.

In another embodiment of the present application, as shown in fig. 3, the front end of the endoscope 70 is provided with the lens 71, in order to ensure the effective field of view of the lens 71, especially to reduce the damage to the gastrointestinal mucosa caused by the front end of the connector 10 being located at one side of the second channel 12, it is necessary to ensure that the lens 71 can see at least that the front end of the connector 10 is located at one side of the second channel 12, so in this embodiment, the included angle β between the end edge of the groove 13 and the lens 71 with respect to the axis of the endoscope 70 is less than or equal to 70 degrees, and since the angle α of the field of view of the lens 71 of the commonly used endoscope 70 is 140 degrees, it is sufficient to ensure that the included angle β between the end edge of the groove 13 and the lens 71 with respect to the axis of the endoscope 70 is less than or equal to 70 degrees.

As shown in fig. 3, it is to be noted that there is a difference in the viewing angle α of the lens 71 of the endoscope 70 of different models. In order to ensure that the lens 71 can see the position of the front end of the connector 10 on the side of the second channel 12, the vertical distance H between the end edge of the groove 13 of the connector 10 and the plane of the lens 71 of the endoscope 70 is calculated according to the included angle β, and the vertical distance H is the length of the front part of the connector 10 on the side of the groove 13. This provides dimensional parameters for making the connector 10. Meanwhile, according to the included angle beta, the height h of the baffle plate 14 can be calculated to ensure that the baffle plate 14 does not block the sight line.

As shown in fig. 2a, in one embodiment of the present application, a clamping groove 412 is provided on the flow control switch 40, and the flow control switch 40 can be clamped to the endoscope 70 through the clamping groove 412. The structure is simple, the disassembly is convenient, and the installation can be carried out at any time.

In one embodiment of the present application, the flow control switch 40 is removably coupled to the suction tube 30.

Since the suction tube 30 is deformed by the long-time squeezing of the suction tube 30 by the flow control switch 40, the suction effect of the negative pressure suction device 80 is affected by the reduction in the aperture of the suction tube 30 (the deformation of the suction tube 30 is not recovered), and therefore, when the catheter device for endoscopic treatment is not in use, the flow control switch 40 is detached from the suction tube 30, the occurrence of the irrecoverable condition of the reduction in the aperture due to the long-time squeezing of the suction tube 30 by the control switch 40 is avoided, the aperture of the suction tube 30 is ensured, and the suction effect of the negative pressure suction device 80 is ensured when in use.

As shown in fig. 4, in one embodiment of the present application, the control switch includes: the body 41 and the pressing assembly 42.

The body 41 is provided with a mounting slot 411 and a clamping slot 412 penetrating the body 41, the mounting slot 411 being configured to accommodate the suction tube 30.

The pressing assembly 42 is connected to the body 41 and is positioned in the mounting slot 411.

The pressing assembly 42 includes: the pressing piece 421 and the elastic piece 422.

The pressing piece 421 can rotate relative to the body 41, one end of the pressing piece 421 protrudes out of the mounting slot 411, and the other end of the pressing piece 421 is configured to press against the suction tube 30 to control on/off of the suction tube 30.

The elastic member 422 is located between the other end of the pressing member 421 and the body 41, and is connected to the pressing member 421 and the body 41, respectively, and the elastic member 422 is configured to return the pressing member 421 to press against the suction tube 30.

Pressure is applied to one end of the pressing member 421, the pressing member 421 rotates relative to the body 41 to change the acting force applied on the suction tube 30 by the other end of the pressing member 421, and at this time, the elastic member 422 stores the force, so as to adjust the flow area of the suction tube 30 in the mounting slot 411, and adjust the suction force of the suction tube 30, i.e. realize manual control of the suction tube 30 on liquid suction, so as to adapt to the requirements of different surgical scenes on the liquid suction speed. Meanwhile, when the suction pipe 30 is required to be closed, the external force applied to the pressing piece 421 is removed, and the pressing piece 421 is reset under the action of the elastic piece 422, so that the other end of the pressing piece 421 is propped against the suction pipe 30 to close the suction pipe 30.

As shown in fig. 1a and 2a, in one embodiment of the present application, catheter 20 comprises: a main pipe 23 and a side pipe 24.

One end of the main pipe 23 is connected to the connector 10, and the other end of the main pipe 23 is provided with a first inlet 21.

One end of the side pipe 24 is connected to the main pipe 23 and is disposed obliquely with respect to the main pipe 23, and the other end of the side pipe 24 is provided with the second inlet 22.

The above structure makes the main pipe 23 have no bending angle, so that the endoscope treatment accessory smoothly passes through the main pipe 23, thereby facilitating the in-out of the endoscope treatment accessory, and ensuring the comfort of the product.

As shown in fig. 1a, 2a and 5, in one embodiment of the present application, the main pipe 23 includes a first pipe section 25 and a second pipe section 26 that are sequentially disposed, the first pipe section 25 is connected to the connector 10, and an axis of the first pipe section 25 intersects an axis of the second pipe section 26. And the intersection between the first tube section 25 and the second tube section 26 is a circular arc transition.

The above configuration allows the second tube section 26 to be disposed at an incline relative to the first tube section 25 such that the second tube section 26 extends away from the endoscope 70 to facilitate entry of an endoscopic treatment accessory into the main tube 23.

As shown in fig. 5, in one embodiment of the present application, the main pipe 23 includes: a first sub-pipe 27 and a second sub-pipe 28.

The first sub-pipe 27 is connected to the connector 10.

The second sub-pipe 28 is detachably connected with the first sub-pipe 27, the side pipe 24 is connected with the second sub-pipe 28, and the second sub-pipe 28 and the side pipe 24 are of an integral structure.

The second sub-pipe 28 and the side pipe 24 form a three-way pipe, so that the guide pipe 20 is split into a plurality of parts, when a certain part of the guide pipe 20 is damaged, only the damaged part needs to be replaced, and the whole guide pipe 20 does not need to be replaced, so that the maintenance cost of products is reduced.

As shown in fig. 6 to 8, in one embodiment of the present application, the catheter device for endoscopic treatment further comprises: a fixing device 50.

The fixture 50 has a third channel 51 therethrough, the fixture 50 being secured at the first inlet 21 of the catheter 20, and the third channel 51 being in communication with the first inlet 21, the fixture 50 being configured to be secured to a handle of the endoscope 70.

The above structure enables the operation end of the endoscope treatment accessory to be connected with the handle of the endoscope 70, so that the operation ends of the endoscope treatment accessory and the endoscope 70 are both positioned in the same (i.e. doctor) hand in the treatment process of the catheter device for the treatment under the endoscope, thereby ensuring the accuracy of the treatment operation and further ensuring the treatment effect of the endoscope treatment accessory.

As shown in fig. 6 to 9, in one embodiment of the present application, the catheter device for endoscopic treatment further includes: sealing cover 60.

A sealing cap 60 is detachably provided at the other end of the duct 20 and seals the first inlet 21.

When the endoscopic treatment accessory does not enter the catheter 20 from the first inlet 21, the sealing cover 60 seals the first inlet 21 so that the catheter 20 has only one inlet and one outlet, thereby ensuring that the negative pressure suction device 80 can effectively suck liquid, so that the view of the front end of the endoscope 70 is fully exposed, and the safety of the operation is improved.

As shown in fig. 10, in one embodiment of the present application, the sealing cover 60 includes: the first body 61 and the first cover 62.

The first body 61 has a first through hole 63 therethrough, and one end of the first through hole 63 communicates with the first inlet 21.

The first cover 62 is detachably provided at the other end of the first body 61, and seals the other end of the first through hole 63.

Wherein the first through hole 63 comprises a first hole section 631 and a second hole section 632 which are communicated, the diameter of the first hole section 631 is larger than that of the second hole section 632, and the second hole section 632 is communicated with the first inlet 21.

The aperture of the second bore section 632 is smaller than the diameter of the portion of the endoscopic treatment accessory that extends into the catheter 20, and when the portion of the treatment is introduced into the catheter 20 through the first through hole 63, the first inlet 21 is sealed so that the catheter 20 has only one inlet and one outlet, thereby ensuring that the negative pressure suction device 80 can effectively suck the liquid, so that the view of the front end of the endoscope 70 is fully exposed, and the safety of the operation is improved. In addition, when the endoscopic treatment accessory does not enter the catheter 20 from the first inlet 21, the sealing cover 60 seals the first through hole 63 to seal the first inlet 21 so that the catheter 20 has only one inlet and one outlet, thereby ensuring that the negative pressure suction device 80 can suck the liquid effectively to fully expose the view of the front end of the endoscope 70 and improving the safety of the operation.

As shown in fig. 11, in one embodiment of the present application, the sealing cover 60 includes: the second body 64 and the second cover 65.

The second body 64 has a second through hole 66 therethrough, one end of the second through hole 66 communicates with the second inlet 22, the second body 64 has elasticity, and the aperture of the second through hole 66 is smaller than the aperture of the duct 20.

The second cover 65 is detachably provided at the other end of the second body 64, and seals the other end of the second through hole 66.

The aperture of the second through hole 66 is smaller than the diameter of the treatment portion of the endoscope treatment accessory extending into the catheter 20, and the second main body 64 has elasticity, when the treatment portion passes through the second through hole 66 and enters the catheter 20, the second main body 64 is wrapped on the treatment portion, so that the second through hole 66 is in a sealed state, and the first inlet 21 is in a sealed state, so that the catheter 20 has only one inlet and one outlet, thereby ensuring that the negative pressure suction device 80 can suck liquid effectively, fully exposing the view of the front end of the endoscope 70, and improving the safety of the operation. In addition, when the endoscopic treatment accessory does not enter the catheter 20 from the first inlet 21, the sealing cover 60 seals the first through hole 63 to seal the first inlet 21 so that the catheter 20 has only one inlet and one outlet, thereby ensuring that the negative pressure suction device 80 can suck the liquid effectively to fully expose the view of the front end of the endoscope 70 and improving the safety of the operation.

In the description of the present application, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise. The term "plurality" means two or more, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The present application has been described in connection with the preferred embodiments, but these embodiments are merely exemplary and serve only as illustrations. On the basis of this, many alternatives and improvements can be made to the present application, which fall within the scope of protection of the present application.

Claims (10)

1. An endoscopic catheter device for use with an endoscope, an endoscopic accessory and a negative pressure suction device, the endoscopic catheter device comprising:

the connecting piece is provided with a first channel and a second channel which are parallel to each other, the first channel and the second channel penetrate through the connecting piece, and the first channel is configured to be matched with an endoscope for use;

a conduit having one end connected to the connector and in communication with the second passageway, the other end of the conduit having a first inlet configured for use with an endoscopic treatment accessory such that the endoscopic treatment accessory can extend into the conduit and a second inlet;

a suction tube having one end connected to one end of the conduit and communicating with the second inlet, the other end of the suction tube being configured to be connected to a negative pressure suction device; and

a flow control switch secured to the suction tube, the flow control switch configured to control the on-off of the suction tube.

2. An endoscopic therapeutic catheter device according to claim 1, wherein,

the catheter includes: one end of the main pipe is connected with the connecting piece, and the other end of the main pipe is provided with the first inlet; and

and one end of the side pipe is connected with the main pipe and is obliquely arranged relative to the main pipe, and the other end of the side pipe is provided with the second inlet.

3. An endoscopic therapeutic catheter device according to claim 2, wherein,

the main pipe comprises a first pipe section and a second pipe section which are sequentially arranged, the first pipe section is connected with the connecting piece, and the axis of the first pipe section is intersected with the axis of the second pipe section.

4. The catheter device for endoscopic treatment according to claim 2, wherein said main tube comprises:

the first sub-pipe is connected with the connecting piece; and

the second sub-pipe is detachably connected with the first sub-pipe, the side pipe is connected with the second sub-pipe, and the second sub-pipe and the side pipe are of an integrated structure.

5. An endoscopic therapeutic catheter device according to claim 1, wherein,

the catheter device for endoscopic treatment further comprises: a fixation device having a third channel therethrough, the fixation device being secured at the first inlet of the catheter and the third channel being in communication with the first inlet, the fixation device being configured to be secured to a handle of an endoscope.

6. An endoscopic therapeutic catheter device according to any one of claims 1 to 5, wherein,

the catheter device for endoscopic treatment further comprises: and the sealing cover is detachably arranged at the other end of the guide pipe and seals the first inlet.

7. The endoscopic therapeutic catheter device according to claim 6, wherein,

the sealing cover includes: a first body having a first through hole therethrough, one end of the first through hole being in communication with the first inlet; and

the first cover body is detachably arranged at the other end of the first main body and seals the other end of the first through hole;

the first through hole comprises a first hole section and a second hole section which are communicated, the diameter of the first hole section is larger than that of the second hole section, and the second hole section is communicated with the first inlet.

8. The endoscopic therapeutic catheter device according to claim 6, wherein,

the sealing cover includes: the second main body is provided with a second through hole penetrating through the second main body, one end of the second through hole is communicated with the second inlet, the second main body is elastic, and the aperture of the second through hole is smaller than that of the guide pipe; and

the second cover body is detachably arranged at the other end of the second main body and seals the other end of the second through hole.

9. The catheter device for endoscopic treatment according to any one of claims 1 to 5, wherein a clamping groove is provided on the flow control switch, and the flow control switch can be clamped on an endoscope through the clamping groove.

10. An endoscopic therapeutic catheter device according to any one of claims 1 to 5, wherein said flow control switch is detachably connected to said suction tube.