CN220212878U

CN220212878U - Distal end cap and medical delivery catheter

Info

Publication number: CN220212878U
Application number: CN202323196755.7U
Authority: CN
Inventors: 江维; 张芳敏; 李琳
Original assignee: Beijing Yunli Jingan Technology Co ltd
Current assignee: Beijing Yunli Jingan Technology Co ltd
Priority date: 2023-11-27
Filing date: 2023-11-27
Publication date: 2023-12-22
Anticipated expiration: 2033-11-27

Abstract

The application discloses distal end cap and medical delivery catheter, the cap body of distal end cap have relative first face and second face, and the first passageway that runs through to the second face is seted up to the first region of first face, and the second passageway that runs through to the second face is seted up to the second region of first face, and the one end that the first passageway is close to first face sets up to the first interface that is used for connecting the scope, and the one end that the second passageway is close to first face sets up to the second interface that is used for connecting the apparatus conveyer pipe. The distal end cap that this application provided is applicable to the auxiliary completion minimally invasive surgery operation, can make the operation maneuverability stronger.

Description

Distal end cap and medical delivery catheter

Technical Field

The application relates to the technical field of medical instruments, in particular to a distal end cap and a medical delivery catheter.

Background

In the diagnosis and treatment process of modern medicine, in order to meet the requirements of small surgical wound, light pain, quick postoperative recovery, attractive appearance and the like, minimally invasive surgery has an increasingly important role in the field of medical surgery. Taking Endoscopic Submucosal Dissection (ESD) as an example, a high-frequency electrotome and other special instruments are used under the endoscope to gradually strip the focus from the normal mucous membrane below the focus so as to achieve the aim of completely resecting the focus.

At present, the following defects exist when an operation is performed through an endoscope: after the electric knife occupies the instrument channel of the endoscope, other instruments such as biopsy forceps and the like can not reach the operation area by means of the endoscope, so that the electric knife can not cooperate with other instruments to implement operation, the operation is relatively complex, and the operability needs to be further improved.

Disclosure of Invention

The application provides the following technical scheme:

the utility model provides a distal end cap, includes the cap body, the cap body has relative first face and second face, the first passageway that runs through to the second face is seted up to the first region of first face, the second passageway that runs through to the second face is seted up to the second region of first face, the first passageway is close to the one end of first face sets up to be used for connecting the first interface of scope, the second passageway is close to the one end of first face sets up to be used for connecting the second interface of apparatus conveyer pipe.

Optionally, in the distal cap, the second channel includes a straight path hole and a curved path hole that are disposed in order from the first face to the second face, and the curved path hole curves from the straight path hole to a side close to the first channel.

Optionally, in the distal cap, a first limiting step is provided at an end of the linear path hole near the curved path hole, the first limiting step being for abutting against an end of the instrument delivery tube.

Optionally, in the distal cap, an end of the straight path hole remote from the curved path hole is provided with a first guiding ramp for facilitating entry of the instrument delivery tube into the straight path hole.

Optionally, in the distal cap described above, the axis of the linear path hole is parallel to the axis of the first channel.

Optionally, in the distal cap, a second limiting step is disposed at an end of the first channel near the second face, and the second limiting step is used for abutting against an end of the endoscope.

Optionally, in the distal cap, an end of the first channel remote from the second face is provided with a second guiding ramp for facilitating entry of the endoscope into the first channel.

Optionally, in the distal cap described above, there is a difference in height between the first region and the second region, and the second region is further from the second face than the first region.

Optionally, in the distal cap, the cap body is cam-shaped or gourd-shaped in a viewing direction parallel to an axial direction of the first passage.

A medical delivery catheter comprising a tube, one end of which is connected to the second channel, and a distal cap as disclosed in any of the preceding claims.

According to the technical scheme, the application provides a distal end cap, the cap body of the distal end cap is provided with a first surface and a second surface which are opposite, a first area of the first surface is provided with a first channel which penetrates to the second surface, a second area of the first surface is provided with a second channel which penetrates to the second surface, when the distal end of an endoscope is connected with the first channel in use, the second channel is connected with the distal end of an instrument conveying pipe, and thus an operator can enter the instruments such as biopsy forceps into a human body from the instrument conveying pipe and the second channel of the distal end cap, and thus, the distal end cap provided by the application is suitable for assisting in completing minimally invasive surgery operation, and can enable surgery operability to be stronger.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic illustration of the use of a medical delivery catheter provided in an embodiment of the present application;

FIG. 2 is a schematic perspective view of the distal cap of FIG. 1;

FIG. 3 is a schematic view of a distal cap provided in an embodiment of the present application;

fig. 4 is a cross-sectional view of the distal cap of fig. 3.

Marked in the figure as:

1. a cap body; 2. an instrument delivery tube; 3. an endoscope; 4. an endoscope operating handle; 11. a first channel; 111. a second limit step; 12. a second channel; 121. a curved path hole; 122. a straight path hole.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Referring to fig. 1-4, the embodiment of the application provides a distal cap, including a cap body 1, the cap body 1 has opposite first face and second face, and first passageway 11 that runs through to the second face is seted up to the first region of first face, and second passageway 12 that runs through to the second face is seted up to the second region of first face, and the one end that first passageway 11 is close to first face sets up to be used for connecting the first interface of scope 3, and the one end that second passageway 12 is close to first face sets up to be used for connecting the second interface of apparatus conveyer pipe 2.

Before performing the surgical operation, the operator first connects the endoscope 3 and the instrument delivery tube 2 with the distal cap, i.e. the distal cap is sleeved on the distal ends of the endoscope 3 and the instrument delivery tube 2, the distal end of the endoscope 3 extends into the first channel 11 of the cap 1, and the distal end of the instrument delivery tube 2 extends into the second channel 12 of the cap 1. The instrument delivery tube 2 may then be constrained to the outside of the endoscope 3 using a fixed connection such as medical tape, a tie, or the like, and the proximal end of the instrument delivery tube 2 may be constrained to the edge of the endoscope operating handle 4, i.e., the location indicated by arrow a in fig. 1.

After the installation is completed, the operator controls the endoscope 3 to enter the human body, and the distal end cap moves along with the endoscope 3 to approach the target position. In the field of view of the endoscope 3 fed back, instruments such as a biopsy forceps are introduced into the human body from the instrument delivery tube 2 and the second channel 12 of the distal end cap, so that surgical operations can be performed in cooperation with an electric knife introduced into the human body from the first channel 11 of the endoscope 3 and the distal end cap, for example, the biopsy forceps clamp mucous membrane tissues and lift up, so as to obtain a clear submucosal field of view, and an operator can perform operations such as tissue cutting and the like more smoothly through the electric knife. Therefore, the distal end cap provided by the application is suitable for assisting in completing minimally invasive surgical operation, and can enable the surgical operability to be stronger.

As shown in fig. 3 and 4, in a preferred embodiment, the second channel 12 includes a straight path hole 122 and a curved path hole 121 disposed in order from the first face to the second face, and the curved path hole 121 curves from the straight path hole 122 to a side close to the first channel 11. Since the curved path hole 121 is curved toward the first channel 11, the instrument entering the human body from the second channel 12 can reach the central area of the visual field of the endoscope 3 more quickly. When the operator advances the instrument forward from the second channel 12 of the distal cap, the instrument is bent by the curved path hole 121, so that the distal end of the instrument reaches the center area of the visual field of the endoscope 3 only by the advancing action, which is easy to operate, convenient and quick.

As shown in fig. 1 and 4, in the present embodiment, the end of the straight path hole 122 near the curved path hole 121 is provided with a first limiting step for abutting against the end of the instrument delivery tube 2. That is, when the distal cap is fitted to the distal end of the instrument carrier tube 2, the instrument carrier tube 2 reaches the first limit step only at most after extending into the linear path hole 122. By providing the first limiting step, the curved path hole 121 does not participate in the connection of the instrument conveying pipe 2, and only the straight path hole 122 is used for connecting the instrument conveying pipe 2, so that the connection and the disassembly of the distal end cap and the instrument conveying pipe 2 are more convenient, and the connection can be well completed no matter whether the material of the instrument conveying pipe 2 is hard or soft. In order to fixedly connect the instrument delivery tube 2 to the distal cap, an interference fit should be provided between the instrument delivery tube 2 and the linear path bore 122. It will be readily appreciated that the step height of the first stop step is generally set to be no greater than the wall thickness of the instrument delivery tube 2 so as to enable better passage of instruments therethrough. Further, the first limiting step is preferably provided so as to be able to achieve a fit with the distal end of the instrument carrier tube 2, i.e., the step surface of the first limiting step has a planar or curved shape in conformity with the distal end surface of the instrument carrier tube 2, for example, in the structure shown in fig. 4, the linear path hole 122 is provided with a first limiting step of a curved revolution surface shape near one end of the curved path hole 121 so as to accommodate the instrument carrier tube 2 having a curved revolution surface at the distal end peripheral edge, and when the instrument carrier tube 2 is extended from the linear path hole 122 to the first limiting step, the distal end peripheral edge of the instrument carrier tube 2 is closely fitted with the first limiting step.

In this embodiment, the end of the straight path hole 122 remote from the curved path hole 121 is provided with a first guiding ramp for facilitating entry of the instrument delivery tube 2 into the straight path hole 122. It will be readily appreciated that by providing the first guide ramp, the end of the straight path bore 122 remote from the curved path bore 121 forms a counterbore so that the instrument carrier tube 2 can more easily enter the straight path bore 122 when the distal cap is sleeved onto the distal end of the instrument carrier tube 2, thereby improving the efficiency of the assembly operation. Similarly, in a preferred embodiment, the end of the first channel 11 remote from the second face is provided with a second guiding bevel to facilitate entry of the endoscope 3 into the first channel 11.

After the distal cap has been applied to the distal end of the endoscope 3, it should not affect the viewing of the user through the endoscope 3, i.e. the distal cap should not affect the taking of the endoscope 3. Thus, the distal end of the endoscope 3 should be prevented from being too far from the second face of the cap 1, e.g. the distal end of the endoscope 3 may be flush with the second face of the cap 1 or slightly protruding beyond the second face. However, in order to facilitate the rapid assembly of the cap 1 and the endoscope 3, in this embodiment, the end of the first channel 11 near the second surface is provided with a second limiting step 111, and the second limiting step 111 is used to abut against the end of the endoscope 3. It is easy to understand that the distance from the second limiting step 111 to the second surface of the cap body 1 is not too large, and the distance is generally set to be 2 mm-5 mm.

As shown in fig. 1 and 4, in the present embodiment, the axis of the straight path hole 122 is parallel to the axis of the first passage 11. Of course, in other embodiments, the axis of the linear path hole 122 may be at a smaller angle to the axis of the first channel 11, such that the instrument delivery tube 2 is closer to the outer surface of the endoscope 3, i.e., the end of the linear path hole 122 distal from the curved path hole 121 is closer to the axis of the first channel 11 than the end of the linear path hole 121 is to the axis of the first channel 11, such that the axis of the linear path hole 122 is at an angle of, for example, less than 5 °.

As shown in fig. 3 and 4, in the present embodiment, there is a height difference between the first region and the second region, and the second region is farther from the second face than the first region. That is, the first surface of the cap body 1 has a protrusion, the second region is a top surface of the protrusion, and the second channel 12 penetrates from the top surface of the protrusion to the second surface of the cap body 1. Of course, in other embodiments, there may be no difference in height between the first and second regions, i.e., the first and second regions are flush.

In order to minimize the cross-sectional size of the cap body 1, in this embodiment, the cap body 1 has a cam shape or a gourd shape in a viewing direction parallel to the axial direction of the first passage 11. As shown in fig. 3, the area where the first channel 11 is located occupies a large part of the cross section of the cap body 1, and the area where the second channel 12 is located occupies a small part of the cross section of the cap body 1.

The present application also provides a medical delivery catheter comprising a tube and a distal cap as disclosed in any of the embodiments above, one end of the tube being connected to the second channel 12 of the distal cap. Since the distal end cap disclosed in the above embodiments has the above technical effects, the medical delivery catheter having the distal end cap also has the above technical effects, and will not be described herein.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a distal end cap, its characterized in that, includes the cap body, the cap body has relative first face and second face, the first passageway that runs through to the second face is seted up in the first region of first face, the second passageway that runs through to the second face is seted up in the second region of first face, the first passageway is close to the one end of first face sets up to be used for connecting the first interface of scope, the second passageway is close to the one end of first face sets up to be used for connecting the second interface of apparatus conveyer pipe.

2. The distal cap of claim 1, wherein the second channel comprises a straight path hole and a curved path hole disposed in sequence from the first face to the second face, the curved path hole curving from the straight path hole to a side proximate the first channel.

3. The distal cap of claim 2, wherein an end of the linear path bore proximate the curved path bore is provided with a first stop step for abutment with an end of the instrument delivery tube.

4. The distal cap of claim 3, wherein an end of the linear path bore remote from the curved path bore is provided with a first guiding ramp to facilitate entry of the instrument delivery tube into the linear path bore.

5. The distal cap of claim 4, wherein the axis of the linear path bore is parallel to the axis of the first channel.

6. The distal cap of claim 1, wherein an end of the first channel proximate the second face is provided with a second stop step for abutting an end of the endoscope.

7. The distal cap of claim 6, wherein an end of the first channel distal from the second face is provided with a second guiding ramp that facilitates entry of the endoscope into the first channel.

8. The distal cap of any one of claims 1-7, wherein there is a height difference between the first region and the second region, and the second region is further from the second face than the first region.

9. The distal cap of claim 8, wherein the cap body is cam-shaped or gourd-shaped in a viewing direction parallel to the axial direction of the first channel.

10. A medical delivery catheter comprising a tube and a distal cap according to any one of claims 1 to 9, one end of the tube being connected to the second channel.