CN116672164B

CN116672164B - Eustachian tube bracket

Info

Publication number: CN116672164B
Application number: CN202210167147.4A
Authority: CN
Inventors: 陶忠; 史庆; 吴越; 林龑; 王海军; 王昊飞
Original assignee: Baiwei Wuhan Medical Technology Co ltd
Current assignee: Baiwei Wuhan Medical Technology Co ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2024-04-19
Anticipated expiration: 2042-02-23
Also published as: CN116672164A

Abstract

The present disclosure discloses a eustachian tube stent. The eustachian tube bracket comprises a bracket body, wherein the bracket body is made of elastic materials; the bracket body is provided with a notch; the bracket body is provided with a contracted state and an expanded state, in the contracted state, the opening part is provided with a first opening width, in the expanded state, the opening part is provided with a second opening width, and the first opening width is smaller than the second opening width; the cross section of the bracket body is curved.

Description

Eustachian tube bracket

Technical Field

The present disclosure relates to the technical field of medical devices, and more particularly, to a eustachian tube stent.

Background

Eustachian tube dysfunction (Eustachian Tube Dysfunction, ETD) is a syndrome of symptoms and signs associated with eustachian tube dysfunction. The symptoms of eustachian tube such as ear distress, tinnitus, hearing decline and the like are caused by the fact that the mucous membrane of the cartilaginous part of the eustachian tube is inflamed, blocked by excessive secretion, engorged, hypertrophied and even ossified, so that the eustachian tube can not actively and normally open, thereby causing tympanic effusion. Eustachian tube dysfunction has a prevalence of about 1% -5% in adults, and children's ETD and otitis media have a prevalence higher than adults, with about 40% of children under 10 years experiencing at least 1 transient ETD. ETD is triggered for a variety of reasons, but is closely related to the unique anatomy of the eustachian tube.

Clinically, eustachian tube dysfunctions are often treated with eustachian tube stents. Most of the existing eustachian tube brackets are of a net structure, and hollow parts which are fully distributed on the brackets are arranged on the brackets; the eustachian tube support has the advantages of complex structure, low strength, easy deformation and uneven stress and weak supporting force in the process of supporting the cavity.

In view of the foregoing, a new solution is needed to solve the above-mentioned problems.

Disclosure of Invention

It is an object of the present disclosure to provide a new solution for eustachian tube stents.

According to a first aspect of the present disclosure there is provided a eustachian tube stent comprising:

The bracket body is made of elastic materials; the bracket body is provided with a notch;

The bracket body is provided with a contracted state and an expanded state, in the contracted state, the opening part is provided with a first opening width, in the expanded state, the opening part is provided with a second opening width, and the first opening width is smaller than the second opening width;

The cross section of the bracket body is curved.

Optionally, the cross-sectional shape of the bracket body is S-shaped.

Optionally, the support body has first end and second end, first end with the second end all is provided with the portion of bending, the portion of bending is the arc.

Optionally, the stent body has a first surface disposed proximate to the eustachian tube, the first surface being provided with a cover configured to abut the eustachian tube;

the first surface is concavely provided with fold portion towards the direction of keeping away from eustachian tube, fold portion with form the accommodation space that is used for holding the medicine between the tectorial membrane.

Optionally, the shape of the fold is wave-shaped.

Optionally, the shape of the fold is a figure of a few.

Optionally, the stent body is connected with a traction block at the inner side of the notch, and the traction block is configured to be connected with an external device to implant or recover the stent body.

Optionally, the traction block is of a hollow structure and a threaded part is arranged in the traction block.

Optionally, the end of the traction block is provided with a recovery hook.

Optionally, the material of the bracket body is shape memory alloy.

According to the eustachian tube support that an embodiment of this disclosure provided, it relies on the material self to have elastic deformation's characteristics to and the setting of opening realizes that the support body switches between shrinkage state and expansion state, and need not to set up the support body to the network structure that is full of fretwork portion, so this eustachian tube support is comparatively simple in structure, and the support body is bigger with eustachian tube's area of contact, and the support body can provide stronger holding power for eustachian tube, and the support body is difficult to take place to warp at the in-process that the intracavity supported.

Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic perspective view of a eustachian tube stent according to one embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional structural view of a eustachian tube stent according to one embodiment of the present disclosure;

FIG. 3 is an enlarged schematic view of the first embodiment of FIG. 2A;

FIG. 4 is an enlarged schematic diagram II of FIG. 2A;

FIG. 5 is a partial schematic view of a eustachian tube stent according to one embodiment of the present disclosure;

FIG. 6 is a schematic view of the structure of the delivery cable;

fig. 7 is a schematic view of the structure of the recovery cable.

Reference numerals illustrate:

1. A bracket body; 101. a notch; 102. a bending part; 103. coating a film; 104. a fold portion; 2. a traction block; 21. a threaded portion; 3. a recovery hook; 4. conveying a steel cable; 41. a stud; 5. recovering the steel cable; 51. a recovery ring;

01. A drug; 02. eustachian tube.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1-5, a eustachian tube stent is provided according to one embodiment of the present disclosure. The eustachian tube bracket comprises a bracket body 1, wherein the bracket body 1 is made of elastic materials; the bracket body 1 is provided with a notch 101; the bracket body 1 has a contracted state in which the opening portion 101 has a first opening width and an expanded state in which the opening portion 101 has a second opening width, the first opening width being smaller than the second opening width; the cross-sectional shape of the bracket body 1 is curved.

When the eustachian tube support is needed to be implanted into the eustachian tube 02 of a patient, the eustachian tube support is placed into the guide tube, and is in a contracted state at the moment, and the opening width of the notch 101 arranged on the support body 1 is smaller; when the implantation is completed, the guide tube is drawn back, and the eustachian tube stent is in a unfolded state, so that the opening width of the notch 101 arranged on the stent body 1 becomes large. Further, the stent body 1 can prop open the eustachian tube 02 in the unfolded state. Because the eustachian tube bracket is made of elastic materials and the bracket body 1 is provided with the notch 101, the bracket body 1 is restrained by the guide tube in the guide tube and deformed to be in a contracted state; when the bracket body 1 is separated from the constraint of the guide tube, the bracket body can be restored to be in an unfolding state. This eustachian tube support relies on the material self to have elastic deformation's characteristics to and setting up of opening portion 101 realizes that support body 1 switches between shrinkage state and expansion state, and need not to set up support body 1 to the network structure that is full of fretwork portion, therefore this eustachian tube support is comparatively simple in structure, and support body 1 and eustachian tube 02's area of contact is bigger, and support body 1 can provide stronger holding power for eustachian tube 02, and support body 1 is difficult to take place to warp at the in-process that the intracavity supported.

Further, the bracket body 1 has a first end face and a second end face along an axial direction thereof, and the notch portion 101 is provided to penetrate through the first end face and the second end face. The extending direction of the notch 101 may be parallel to the axial direction of the bracket body 1, or may be inclined at a certain angle with respect to the axial direction of the bracket body 1.

Further specifically, the stent body 1 is made of a shape memory alloy, the stent body 1 is compressed and placed in a guide tube after being shaped, and the stent body is conveyed to the distal end of the guide tube by a conveying steel cable, wherein the distal end is one end far away from an operator. The guide tube stretches into the eustachian tube 02 of the patient, the conveying steel cable is kept still at the moment, the guide tube is pulled back, the eustachian tube support is implanted into the eustachian tube 02 of the patient, and the support body 1 can be automatically unfolded to the size in shaping, so that the eustachian tube 02 of the patient is unfolded.

Referring to fig. 2, in one embodiment, further, the cross-sectional shape of the bracket body 1 is S-shaped.

In this specific example, the stent body 1 is bent to form a structure having an S-shaped cross section, and the structure has two notch portions 101 symmetrically provided, so that the stent body 1 can be switched between the contracted state and the expanded state more easily. And the curve type of this structure is comparatively smooth, can make support body 1 and eustachian tube 02's contact laminating effect better to provide better holding power for eustachian tube 02.

Referring to fig. 2, in one embodiment, further, the stent body 1 having an S-shaped cross-section has a first end and a second end, where the first end and the second end are both provided with a bending portion 102, and the bending portion 102 is arc-shaped.

In this particular example, the curved bends 102 provided at the two ends of the S-shape prevent the stent body 1 from having an exposed tip structure, thereby avoiding the stent body 1 from scratching the eustachian tube 02 wall of the patient.

Referring to fig. 3 and 4, in one embodiment, further, the stent body 1 has a first surface disposed close to the eustachian tube 02, the first surface being covered with a cover film 103, the cover film 103 being configured to abut the eustachian tube 02;

The first surface is concavely provided with a fold 104 toward a direction away from the eustachian tube 02, and a containing space for containing a drug is formed between the fold 104 and the cover film 103.

In this particular example, the provision of the folds 104 allows the stent body 1 to store more drug and thus provide more drug to the patient. The film 103 can prevent the medicine 01 stored in the storage space from falling off.

More specifically, the covering film 103 is made of degradable material; when the stent body 1 is implanted into the eustachian tube 02 of a patient, the covering film 103 can be slowly degraded, and the medicine 01 stored in the accommodating space can contact the wall of the eustachian tube 02 to play a role. In addition, the covering film 103 made of degradable materials can reduce implants in a human body, so that safety is improved.

Referring to fig. 3, in one embodiment, further, the pleat 104 is in the shape of a wave.

In this particular example, the wavy fold 104 is simpler in structure and easier to mold. And the wavy fold 104 does not form a sharp-angled structure, thereby causing no harm to the eustachian tube 02 wall of the patient.

Referring to fig. 4, in one embodiment, further, the fold 104 has a shape of a figure of a few.

In this specific example, the area of the contact portion formed between the two adjacent zigzag-shaped folded portions 104, which is in contact with the coating film 103, is large, and thus the supporting effect is better. The bending deformation of the fold part in the shape of a Chinese character 'ji' is easier, the variability degree is larger, and the bracket body 1 can be more easily contracted into the guide tube with smaller size.

Referring to fig. 2, in one embodiment, further, the stent body 1 is connected with a traction block 2 inside the notch 101, and the traction block 2 is configured to be connected with an external device to implant or recover the stent body 1.

In this specific example, when the eustachian tube stent needs to be implanted or recovered, the center of the stent body 1 can be directly clamped, or the eustachian tube stent can be implanted or recovered by adopting the connection of the conveying steel cable 4 and the traction block 2 in a matched manner, so that the operation is simpler and more convenient.

Referring to fig. 5, in one embodiment, further, the traction block 2 has a hollow structure and a threaded portion 21 is provided in the traction block 2.

In this particular example, the traction block 2 is a threaded sleeve with internal threads; further specifically, referring to fig. 6, a stud 41 is provided at the distal end of the delivery cable 4, the stud 41 has external threads matching with the threaded portion 21, and implantation and recovery of the eustachian tube stent are achieved by threaded connection of the stud 41 and the threaded portion 21, and the whole operation process is simple, convenient and very reliable.

Referring to fig. 5, in one embodiment, further, the end of the traction block 2 is provided with a recovery hook 3.

In this particular example, referring to fig. 7, the retrieval of the eustachian tube stent may be accomplished using a specialized retrieval cable 5; specifically, a recovery ring 51 is provided at the distal end of the recovery wire rope 5, the recovery ring 51 is made of a shape memory alloy, the recovery wire rope 5 is fed into the guide tube, the guide tube is extended into the mouth of the eustachian tube 02, the recovery ring 51 is pushed out of the guide tube, the recovery ring 51 is restored to a circular shape, the recovery hook 3 is sleeved with the recovery ring 51, and the recovery wire rope 5 is withdrawn to drag the eustachian tube bracket into the guide tube. Further, the recovery cable 5 and the delivery cable 4 may share a single body, and the recovery ring 51 and the stud 41 at the distal ends thereof may be detachably structured.

The foregoing embodiments mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in consideration of brevity of line text, no further description is given here.

Although specific embodiments of the disclosure have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A eustachian tube stent, comprising:

The bracket comprises a bracket body (1), wherein the bracket body (1) is made of elastic materials; the bracket body (1) is provided with a notch (101);

the bracket body (1) is provided with a contracted state and an expanded state, the opening part (101) is provided with a first opening width in the contracted state, and the opening part (101) is provided with a second opening width in the expanded state, and the first opening width is smaller than the second opening width;

the section shape of the bracket body (1) is in a curve shape;

The bracket body (1) is not a reticular structure which is fully distributed with hollowed-out parts; the bracket body (1) is provided with a first end face and a second end face along the axial direction of the bracket body, and the opening part (101) penetrates through the first end face and the second end face;

the cross section of the bracket body (1) is S-shaped.

2. Eustachian tube stent according to claim 1, wherein the stent body (1) has a first end and a second end, both the first end and the second end being provided with a bending portion (102), the bending portion (102) being arc-shaped.

3. The eustachian tube stent according to claim 1, wherein the stent body (1) has a first surface disposed proximate to the eustachian tube, the first surface being covered with a cover film (103), the cover film (103) being configured to abut the eustachian tube;

the first surface is concavely provided with a fold part (104) towards a direction far away from the eustachian tube, and an accommodating space for accommodating medicines is formed between the fold part (104) and the covering film (103).

4. A eustachian tube stent according to claim 3, wherein the shape of the folds (104) is wave-like.

5. A eustachian tube stent according to claim 3, wherein the folds (104) are shaped like a Chinese character 'ji'.

6. Eustachian tube stent according to claim 1, wherein the stent body (1) is connected with a traction block (2) inside the cutout (101), the traction block (2) being configured to be connected with an external device for implantation or retrieval of the stent body (1).

7. Eustachian tube stent according to claim 6, wherein the traction block (2) is hollow and a threaded portion (21) is provided in the traction block (2).

8. Eustachian tube stent according to claim 6, wherein the end of the traction block (2) is provided with a retrieval hook (3).

9. Eustachian tube stent according to claim 1, wherein the stent body (1) is made of shape memory alloy.