CN215461292U

CN215461292U - A kind of expander

Info

Publication number: CN215461292U
Application number: CN202121094057.4U
Authority: CN
Inventors: 李轶江; 其他发明人请求不公开姓名
Original assignee: Shenzhen Hno Medical Technology Co ltd
Current assignee: Shenzhen Hno Medical Technology Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-01-11
Anticipated expiration: 2031-05-21

Abstract

Embodiments of the present application provide a dilator comprising a dilating structure and a tubular structure; the expansion structure is sleeved on the periphery of the tubular structure; a medium input interface is arranged at one end of the expansion structure; the tubular structure is provided with a first through hole and a second through hole in the axial direction, the tubular structure is provided with a plurality of medium output holes communicated with the second through hole, and a medium input through the medium input interface sequentially passes through the second through hole and the medium output holes and is output to a gap between the expansion structure and the tubular structure. According to the expander provided by the utility model, the expansion structure is sleeved outside the tubular structure, and the expansion structure can be expanded by inflating and filling liquid; can contract through exhaust or flowing back, can once expand the puncture to target in place, need not change the expander of different bores repeatedly, avoid stabbing the puncture because of the reason of multiple operation, reduce the operation risk, convenient to use, work efficiency is higher.

Description

A kind of expander

Technical Field

The embodiment of the application belongs to the technical field of medical instruments, and particularly relates to an expander.

Background

In the prior art, before an ECMO tubular structure is placed in a puncture of a blood vessel, a guide wire is generally placed first, and then dilators with various calibers are used to dilate the puncture step by step (the calibers of the dilators are gradually increased from small to large). As shown in fig. 1, wherein a1 is muscle, a2 is blood vessel, A3 is guidewire, and a4 is dilator. In the process of expanding the puncture, a doctor needs to repeatedly place and take the gradually increased dilator in type (caliber or outer diameter) through the guide wire until the puncture is expanded to a proper size, and finally place the ECMO tubular structure into the puncture to a blood vessel through the guide wire.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an expander to solve the problems of inconvenience in use and low working efficiency in the prior art.

In order to achieve the above object, the present invention provides a dilator comprising a dilating structure and a tubular structure;

the expansion structure is sleeved on the periphery of the tubular structure; a medium input interface is arranged at one end of the expansion structure;

the tubular structure is provided with a first through hole and a second through hole in the axial direction, the tubular structure is provided with a plurality of medium output holes communicated with the second through hole, and a medium input through the medium input interface sequentially passes through the second through hole and the medium output holes and is output to a gap between the expansion structure and the tubular structure.

As a preferred embodiment of the present application, the expansion structure includes an expansion main body and a holding structure, the holding structure is connected to the expansion main body, and the medium input interface is disposed on the holding structure.

As a preferred embodiment of the present application, the tubular structure comprises a first tubular structure and a second tubular structure, the first tubular structure having an outer diameter smaller than an outer diameter of the second tubular structure, the first tubular structure and the second tubular structure being fixedly connected.

As a preferred embodiment of the present application, the first tubular structure is in clearance fit with the holding structure, and the medium flows into the second through hole through a clearance between the first tubular structure and the holding structure.

As a preferred embodiment of the present application, the first through hole axially penetrates the first tubular structure and the second tubular structure, and the second through hole is axially disposed on the second tubular structure; the first through hole and the second through hole are parallel to each other.

As a preferred embodiment of the present application, the end of the second tubular structure adjacent the first tubular structure is sealingly connected to the end of the gripping structure adjacent the expansion body.

As a preferred embodiment of the present application, both the end of the second tubular structure remote from the first tubular structure and the end of the expansion structure remote from the gripping structure are tapered structures.

As a preferred embodiment of the application, one end of the second tubular structure far away from the first tubular structure is provided with a protruding part, a second sealing element is sleeved on the protruding part, and the expansion structure is arranged between the second sealing element and the first tubular structure in a sealing mode.

As a preferred embodiment of the present application, the tubular structure and the end of the expanded structure remote from the first seal are provided with a second seal.

As a preferred embodiment of the present application, the medium is physiological saline.

The utility model has the beneficial effects that:

compared with the prior art, the expander provided by the utility model has the advantages that the expansion structure is sleeved outside the tubular structure, and the expansion structure can be expanded by inflating and filling liquid; can contract through exhaust or flowing back, can once expand the puncture to target in place, need not change the expander of different bores repeatedly, avoid stabbing the puncture because of the reason of multiple operation, reduce the operation risk, convenient to use, work efficiency is higher.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions, and it will be understood by those skilled in the art that the drawings are not necessarily drawn to scale, in which:

FIG. 1 is a schematic view of a prior art dilator in use;

FIG. 2 is a schematic perspective view of the dilator provided by the present invention;

fig. 3 is a schematic structural view of the expander provided by the present invention in a balloon expanded state;

FIG. 4 is an exploded view of the expander provided by the present invention;

FIG. 5 is a schematic cross-sectional view of a dilator provided by the present invention;

the attached drawings are as follows: 1-expanded structure, 2-second seal, 3-tubular structure, 4-first seal, 5-connector, 11-expanded body front end, 12-expanded body, 13-gripping structure, 14-media input port, 15-cavity, 16-end cap, 17-opening, 21-mounting hole, 31-extension, 32-second tubular structure front end, 33-second tubular structure, 34-first tubular structure, 35-media output hole, 36-second through hole, 37-first through hole, 41-axial opening, a 1-muscle, a 2-blood vessel, A3-guide wire, a 4-dilator.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are merely exemplary of some, and not all, of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 2-4, in one embodiment of the present invention, there is provided a stent comprising a tubular structure 3 and a stent structure 1; the expansion structure 1 is sleeved on the periphery of the tubular structure 3, and two ends of the expansion structure 1 are hermetically connected with two ends of the tubular structure 3, so that the expansion structure 1 is prevented from being leaked when filled with a filling medium to expand or swell the expansion structure.

The tubular structure 3 is provided with a first through hole 37 and a second through hole 36 in the axial direction, the tubular structure 3 is provided with a plurality of medium output holes 35 communicated with the second through hole 36, the second through hole 36 is provided with a plurality of through holes, and one first through hole 37 is used for penetrating a guide wire a3 (refer to fig. 1 and 5).

Preferably, the aforesaid plurality of second through holes 36 are uniformly distributed along the circumferential direction of the tubular structure 3; the above-mentioned plurality of medium outlet holes 35 are evenly distributed at intervals along the axial direction of the tubular structure 3. The structure can ensure that the medium with certain pressure sprayed from the medium output hole 35 uniformly acts on the expansion main body 12 to ensure that the expansion is uniform, thereby ensuring that the muscle at the puncture is uniformly contracted, avoiding the phenomena of abnormal muscle deformation and muscle damage and reducing the operation risk.

The medium can adopt air or physiological saline or other gases and the like.

The medium input through the medium input interface 14 sequentially passes through the second through hole 36 and the medium output hole 35, and is output to the gap between the expansion structure 1 and the tubular structure 3.

The expansion structure 1 comprises an expansion main body 12 arranged at the front section and a holding structure 13 arranged at the rear section, the holding structure 13 is connected with the expansion main body 12, and the medium input interface 14 is arranged on the holding structure 13. The holding structure 13 is made of hard material, is not easy to deform and is convenient to hold by hand during operation.

In some preferred embodiments, the inner wall of the expansion body 12 is in clearance fit with the outer wall of the tubular structure 3, which may facilitate the flow of medium into this clearance for the purpose of expanding the puncture.

It should be noted that fig. 4 is an exploded view of the present invention, in which the expanded structure 1 is in a cut-away state.

As shown in fig. 4-5, the tubular structure 3 comprises a first tubular structure 34 and a second tubular structure 33, the first tubular structure 34 having an outer diameter smaller than the outer diameter of the second tubular structure 33; the first tubular structure 34 and the second tubular structure 33 are fixedly connected.

In the embodiment of the present application, the expansion structure 1 is a tubular structure, the holding structure 13 is provided with a cavity 15 therein, when the holding structure 13 and the expansion structure 1 are assembled together, a gap is provided between the holding structure 13 and the expansion structure 1, the first tubular structure 34 is in clearance fit with the holding structure 13, and the second through hole 36 is communicated with the medium input interface 14 through the gap.

The first through hole 37 axially penetrates the first tubular structure 34 and the second tubular structure 33, and the second through hole 36 is axially arranged on the second tubular structure 33; the first through hole 37 and the second through hole 36 are parallel to each other.

The end of the second tubular structure 33 adjacent to the first tubular structure 34 is sealingly connected to the end of the gripping structure 13 adjacent to the expansion body 12.

The end (second tubular structure front end 32) of the second tubular structure 33 far away from the first tubular structure 34 and the end (expansion main body front end 11) of the expansion structure 1 far away from the holding structure 13 are both conical structures, the pipe diameter of the part of the expander inserted into the puncture hole can be as small as possible by the conical structures, the risk of puncturing the muscle of the human body at the puncture hole is reduced, the conical structures play a guiding role in use, the expander can be conveniently inserted into the puncture hole, and in the application, the front end of the second through hole 36 is directly communicated with the inner wall of the expansion main body front end 11.

The end of the second tubular structure 33 far away from the first tubular structure 34 is provided with a protruding part 31, the protruding part 31 is sleeved with a first sealing element 4, and the expansion structure 1 is arranged between the first sealing element 4 and the second tubular structure 33 in a sealing manner.

The first sealing member 4 and the protruding portion 31 can be connected and sealed by using a thread, an adhesive or welding. The first seal member 4 is a tapered structure having a size that is small at the front and large at the rear. The tapered configuration of the first seal 4 provides a guide for insertion of the dilator into the puncture. The first seal 4 is provided with an axial opening 41 for fitting over the extension 31. The protruding portion 31, the second tubular structure 33, and the first tubular structure 34 of the tubular structure 3 are preferably integrally formed, or may be separately formed as needed.

As shown in fig. 4, the front end 11 of the expansion body is provided with an end cap 16, the end cap 16 is provided with an opening 17, and the extension 31 extends out of the end cap 16 through the opening 17.

The end cap 16, the front end 11 of the expansion body and the expansion body 12 are integrated, the expansion body 12 and the holding structure 13 can be integrated or separated, and when the expansion body 12 and the holding structure 13 are separated, they can be connected together by bonding or hot-melt welding.

The tubular structure 3 and the end of the expansion structure 1 remote from the first seal are provided with a second seal.

The second sealing element 2 is sleeved on the first tubular structure 34, and the second sealing element 2 is arranged in the cavity 15 and is in sealing connection with the holding structure 13. The second sealing element 2 and the first tubular structure 34 can be connected by threads, adhered, welded and the like, and the second sealing element 2 and the holding structure 13 can be sealed by adhesion, tight fit and the like. The second sealing element 2 is cylindrical and provided with a mounting hole 21, and the second sealing element 2 is sleeved on the first tubular structure 34 through the mounting hole 21.

The medium input port 14 is provided with a connecting piece 5. The connecting piece 5 can be a pipe joint and the like, and is conveniently connected with an external pipeline.

When in use, the guide wire A3 passes through the first through hole 37, the expansion main body 12 of the expander is partially inserted into a puncture hole of muscle, gas or liquid with certain pressure is input through the medium input port 14, and then the gas or liquid sequentially passes through the second through hole 36 and the medium output hole 35 and is output to a gap between the expansion structure 1 and the tubular structure 3, so that the expansion main body 12 is expanded to a proper size, the puncture hole is expanded to a proper size, and then the gas or liquid in the expansion main body 12 is pumped out through negative pressure, so that the gas or liquid is contracted and reset, the expander is pulled out, therefore, the ECMO cannula can be conveniently inserted without sequentially and repeatedly expanding the puncture hole through expanders with different sizes, and the risk of multiple expansion by using the expander is increased, the probability of puncturing blood vessels is increased, the probability of large bleeding is increased, the probability of infection is increased, and the like, therefore, the utility model has the reduced operation risk, convenient use and high working efficiency.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A dilator, characterized by: comprises an expansion structure and a tubular structure;

the expansion structure is sleeved on the periphery of the tubular structure, and a medium input interface is arranged at one end of the expansion structure;

2. A dilator as defined in claim 1, wherein: the expansion structure comprises an expansion main body and a holding structure, the holding structure is connected with the expansion main body, and the medium input interface is arranged on the holding structure.

3. The dilator of claim 1 or 2, wherein: the tubular structure comprises a first tubular structure and a second tubular structure, the outer diameter of the first tubular structure is smaller than that of the second tubular structure, and the first tubular structure and the second tubular structure are fixedly connected.

4. The dilator of claim 3, wherein: the first tubular structure is in clearance fit with the holding structure, and the medium flows into the second through hole through a clearance between the first tubular structure and the holding structure.

5. The dilator of claim 3, wherein: the first through hole axially penetrates through the first tubular structure and the second tubular structure, and the second through hole is axially arranged on the second tubular structure; the first through hole and the second through hole are parallel to each other.

6. The dilator of claim 5, wherein: one end of the second tubular structure close to the first tubular structure is connected with one end of the holding structure close to the expansion main body in a sealing mode.

7. The dilator of claim 6, wherein: the end of the second tubular structure far away from the first tubular structure and the end of the expansion structure far away from the holding structure are both conical structures.

8. The dilator of claim 7, wherein: one end of the second tubular structure, which is far away from the first tubular structure, is provided with a protruding part, a first sealing element is sleeved on the protruding part, and the expansion structure is arranged between the first sealing element and the second tubular structure in a sealing manner.

9. The dilator of claim 8, wherein: the tubular structure and the end of the expansion structure remote from the first seal are provided with a second seal.

10. The dilator of any one of claims 1 to 9, wherein: the medium is physiological saline.