CN109481106B - Anti-reflux bracket for esophagus - Google Patents
Anti-reflux bracket for esophagus Download PDFInfo
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- CN109481106B CN109481106B CN201811522334.XA CN201811522334A CN109481106B CN 109481106 B CN109481106 B CN 109481106B CN 201811522334 A CN201811522334 A CN 201811522334A CN 109481106 B CN109481106 B CN 109481106B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- Biomedical Technology (AREA)
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- Oral & Maxillofacial Surgery (AREA)
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- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
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Abstract
The invention discloses an anti-reflux bracket for esophagus, which comprises: the bracket comprises a bracket main body and ports which are respectively arranged at two end parts of the bracket main body in an integrated mode, wherein a channel suitable for food circulation is formed between the ports in the inner cavity of the bracket main body; a stopping unit which is suitable for preventing food in the channel from flowing back is arranged in the inner cavity of the bracket main body; the stop unit comprises at least one anti-reflux valve which is obliquely arranged relative to the inner cavity wall of the bracket main body.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to an anti-reflux bracket for esophagus.
Background
The esophageal stent placement method has the advantages of obvious curative effect, simple and convenient operation, slight wound and the like, is widely used, is particularly suitable for patients with poor general conditions, cannot tolerate radiation and chemotherapy and patients with radiation and chemotherapy failure or tumor remote metastasis, and is particularly suitable for patients with narrow esophagus caused by tumors and can not radically cure the disease through surgical excision by adopting an esophageal stent so as to allow food to pass through.
After a normal person eats, the sphincter of the stomach and the esophagus is closed, food cannot flow back into the esophagus to cause vomiting, but for the stenosis of the stomach and esophagus and the stomach cardia, the esophageal stent is placed in the stomach and the sphincter of the stomach and the esophagus is destroyed, so that after the patient eats, the food can flow back due to peristalsis of the stomach, and the food enters the oral cavity from the stent to cause vomiting of the patient, and even the food can flow back to cause esophagitis, so that discomfort is caused to the patient.
SUMMARY OF THE PATENT FOR INVENTION
The invention aims to provide an anti-reflux bracket for esophagus, which aims to solve the technical problem of reducing food reflux probability in the esophagus.
The anti-reflux bracket for esophagus of the patent is realized by the following steps:
an anti-reflux stent for an esophagus comprising: the bracket comprises a bracket main body and ports which are respectively arranged at two end parts of the bracket main body in an integrated mode, wherein a channel suitable for food circulation is formed between the ports in the inner cavity of the bracket main body;
a stop unit which is suitable for preventing food in the channel from flowing back is arranged in the inner cavity of the bracket main body;
the stop unit comprises at least one backflow prevention valve obliquely arranged relative to the inner cavity wall of the bracket main body.
In an alternative embodiment of the present invention, the anti-reflux valve is an arc-shaped valve;
the arc-shaped structure valve comprises a large curvature part and a small curvature part which are integrally formed into an arc-shaped structure; wherein the method comprises the steps of
The small curvature part is arranged near one side of the food inflow; and
the arc opening of the arc structure valve faces to one side of food inflow.
In a preferred embodiment of the invention, the edges of the small curvature are connected to the lumen wall of the stent body.
In a preferred embodiment of the present invention, 1/3 to 1/2 of the length of the edge of the large curvature portion extending integrally along the edge of the large curvature portion from either end connected to the small curvature portion is connected to the inner cavity wall of the holder main body, and a gap suitable for food circulation is formed with respect to the inner cavity wall of the holder main body at the edge where the large curvature portion is not connected to the inner cavity wall of the holder main body.
In an alternative embodiment of the invention, a 1/2 part of the edge length of the large curvature portion extending from either end connected to the small curvature portion along the edge of the large curvature portion to the entire edge length of the large curvature portion is connected to the lumen wall of the stent body.
In an alternative embodiment of the present invention, the stop unit includes two arc-shaped structural valves spaced apart from each other along the axial direction of the stent body on the inner cavity wall of the stent body;
the two arc-shaped structure valves are obliquely arranged on the inner wall of the bracket main body, and are distributed in a staggered structure relative to the inner wall of the bracket main body, wherein one arc-shaped structure valve is arranged in a forward direction, and the other arc-shaped structure valve is arranged in a reverse direction.
In an alternative embodiment of the present invention, the stop unit includes three arc-shaped structural valves spaced apart from each other along the axial direction of the stent body on the inner cavity wall of the stent body;
the three arc-shaped structure valves are obliquely arranged on the inner wall of the bracket main body, and are distributed in a dislocation structure relative to the inner wall of the bracket main body; and
each two of the three arc-shaped structural valves are arranged at an included angle of 120 degrees.
In an alternative embodiment of the present invention, the stop unit includes four arc-shaped structural valves spaced apart from each other along the axial direction of the stent body on the inner cavity wall of the stent body;
the four arc-shaped structure valves are obliquely arranged on the inner wall of the bracket main body, and are distributed in a dislocation structure relative to the inner wall of the bracket main body; and
each two arc-shaped structure valves of the four arc-shaped structure valves are arranged at an included angle of 90 degrees.
In an alternative embodiment of the invention, the anti-reflux valve is a spiral valve.
In an alternative embodiment of the present invention, the anti-reflux valve is a planar structural valve.
By adopting the technical scheme, the invention has the following beneficial effects: according to the esophageal reflux-preventing bracket, the check unit which is formed by the inner cavity wall of the bracket main body and is suitable for preventing food in the channel from being refluxed forms the one-way valve for food flowing in the inner cavity of the bracket main body, so that the check unit plays a role in blocking food from being refluxed.
Drawings
FIG. 1 is a schematic view showing the state of the invention in which the anti-reflux stent for esophagus is placed in the esophagus;
FIG. 2 is a schematic view of the structure of one embodiment of the esophageal anti-reflux stent of the present invention;
FIG. 3 is a schematic view of the structure of another embodiment of the esophageal anti-reflux stent of the present invention;
FIG. 4 is a schematic structural view of an anti-reflux stent for esophagus according to example 4 of the present invention;
FIG. 5 is a schematic view showing the structure of an anti-reflux stent for esophagus according to example 5 of the present invention;
fig. 6 is a schematic structural view of an esophageal reflux stent according to example 6 of the present invention.
In the figure: the stent comprises a stent body 1, a port 2, an anti-backflow valve 3, a small curvature part 301, a large curvature part 303, a medical polymer film 4, a gap R, a spiral structure valve 6 and a plane structure valve 7.
Detailed Description
In order that the contents of the present patent may be more clearly understood, the present patent will be further described in detail with reference to specific embodiments thereof with reference to the accompanying drawings.
Example 1:
referring to fig. 1, the present embodiment provides an anti-reflux stent for esophagus, including: the bracket comprises a bracket main body 1 and ports 2 which are respectively arranged at two end parts of the bracket main body 1 in an integrated mode, wherein a channel suitable for food circulation is formed between the ports 2 in the inner cavity of the bracket main body 1; a stopping unit adapted to prevent food in the passage from flowing back is provided in the inner cavity of the holder body 1; the stop unit in this embodiment comprises an anti-reflux valve 3 arranged obliquely to the wall of the lumen of the holder body 1.
The anti-reflux valve in this embodiment employs an arcuate structural valve 3. Specifically, the arch-shaped structure valve 3 includes a large curvature portion 303 and a small curvature portion 301 that integrally form an arch-shaped structure; wherein the small curvature 301 is disposed near the inflow side of the food; and the side of the arc-shaped mouth of the arc-shaped structure valve 3 facing the inflow of food.
The inner cavity wall of the bracket main body 1 is covered with a medical polymer film 4; the arc-shaped structural valve 3 is made of a medical polymer film; the thickness of the medical polymer film which is made into the valve 3 with the arc-shaped structure is larger than that of the medical polymer film 4 which is covered on the inner cavity wall of the bracket main body 1. The structure ensures that the arc-shaped structural valve 3 has certain strength in the circulation process of food, and reduces the possibility of deformation of the arc-shaped structural valve 3 under the condition that the arc-shaped structural valve 3 is impacted when the food passes. The arc-shaped structural valve 3 can be directly connected with the medical polymer film 4 covered on the inner cavity wall of the stent main body 1. The medical polymer film 4 and the medical polymer film can be made of medical silica gel materials, for example and not limited to.
Alternatively, the present embodiment adopts the small curvature portion 301 as an axisymmetric structure. The small curvature 301 of the axisymmetric structure makes the deformation resistance of the arc-shaped structural valve 3 stronger, and particularly, the deformation resistance of the arc-shaped structural valve 3 is obvious due to the small curvature 301 of the axisymmetric structure under the action of pressure on the arc-shaped structural valve 3 caused by food passing.
Referring to fig. 2, the arc-shaped structural valve 3 in this embodiment is connected to the inner cavity wall of the stent body 1 such that the edge of the small curvature 301 of the arc-shaped structural valve 3 is connected to the inner cavity wall of the stent body 1. The 1/3 to 1/2 of the edge length of the large curvature portion 303 extending from either end connected to the small curvature portion 301 along the edge of the large curvature portion 303 as a whole is connected to the inner cavity wall of the stent body 1, and the edge where the large curvature portion 303 is not connected to the inner cavity wall of the stent body 1 forms a gap R suitable for food circulation with respect to the inner cavity wall of the stent body 1. That is, when food passes through the arc-shaped structural valve 3, the food firstly contacts the small curvature part 301, then flows from the small curvature part 301 to the large curvature part 303, and finally flows out from a gap R formed between part of the edge of the large curvature part 303 and the inner cavity wall of the bracket main body 1 and leaves the arc-shaped structural valve 3.
Alternatively, a 1/2 part of the edge of the large curvature portion 303 extending from either end connected to the small curvature portion 301 along the edge of the large curvature portion 303 to the entire edge length of the large curvature portion 303 is connected to the inner cavity wall of the stent body 1, that is, half of the edge of the large curvature portion 303 is connected to the inner cavity wall of the stent body 1, and a gap R suitable for food circulation is formed at the half of the edge with respect to the inner cavity wall of the stent body 1.
Referring to fig. 3, the arc-shaped valve 3 of the present embodiment may be further configured such that the large curvature portion 303 and the small curvature portion 301 are axisymmetric and the axis of the large curvature portion 303 is collinear with the axis of the small curvature portion 301, which is connected to the inner wall of the stent body 1. At this time, the edge of the small curvature portion 301 is connected to the inner cavity wall of the stent body 1, while the edge portion of the large curvature portion 303 at the corresponding axis is connected to the inner cavity wall of the stent body 1, and a gap R suitable for food circulation is formed at the portion of the large curvature portion 303 not connected to the inner cavity wall of the stent body 1, and at this time, the portion of the edge of the large curvature portion 303 connected to the inner cavity of the stent body 1 may occupy 1/8 to 1/6 of the entire length of the large curvature portion 303. The valve 3 with the integral arc-shaped structure has high symmetry and good use stability.
Since the arc-shaped structural valve 3 of the present embodiment is disposed obliquely with respect to the inner cavity wall of the direct body, the food flowing onto the arc-shaped structural valve 3 can naturally flow from the small curvature portion 301 to the large curvature portion 303 along the oblique direction of the arc-shaped structural valve 3, i.e. the oblique structure of the arc-shaped structural valve 3 forms a guiding film for the food flowing forward, and finally leaves the arc-shaped structural valve 3 from the gap R existing between the edge of the large curvature portion 303 and the inner cavity wall of the stent body 1. The arc-shaped structural valve 3 of the present embodiment does not affect the normal circulation of food. When food needs to be returned, the arc-shaped structural valve 3 which is obliquely arranged does not exist, so that the guiding effect on the food which is returned can be formed, and the size of a gap R formed at the edge of the large curvature part 303 relative to the inner cavity wall of the bracket main body 1 is far smaller than the diameter of the inner cavity of the bracket main body 1, therefore, the efficiency of food returning can be reduced by arranging one arc-shaped structural valve 3 of the embodiment, and a certain stopping effect on the food returning can be achieved.
Example 2:
referring to fig. 1, the anti-reflux stent for esophagus of this embodiment has the same general structure as the anti-reflux stent for esophagus of embodiment 1, except that the stopper unit of the anti-reflux stent for esophagus of this embodiment includes two arc-shaped structural valves 3 disposed at intervals along the axial direction of the stent body 1 at the inner cavity wall of the stent body 1.
It should be noted that, for the two arc-shaped structural valves 3 in the present embodiment, the arc-shaped structural valves 3 with the same size may be optionally provided, and the small curvature portion 301 is preferably designed to be an axisymmetric structure.
The inner walls of the two arc-shaped structure valves 3 are obliquely arranged, the two arc-shaped structure valves 3 are distributed in a dislocation structure relative to the inner wall of the bracket main body 1, one arc-shaped structure valve 3 is arranged in the forward direction, the other arc-shaped structure valve 3 is arranged in the reverse direction, and when food circulates in the esophagus in the forward direction due to the dislocation structure distribution mode, the food can circulate in the bracket main body 1 in the dislocation structure rapidly, and specifically, the small curvature part 301 of the arc-shaped structure valve 3 positioned at the downstream side in the food circulation direction in the two arc-shaped structure valves 3 is positioned under the large curvature part 303 of the arc-shaped structure valve 3 positioned at the upstream side. Preferably in a central symmetrical manner for the two arc-shaped structural valves 3. Through such setting for food needs to flow back when needing to loop through two arc structure valves 3 in proper order, moreover because two arc structure valves 3 are central symmetry mode distribution, the food of reverse circulation even after there is clearance R in the edge of the big curvature portion 303 of arc structure valve 3 of the nearest that here low reaches of food of reverse circulation for support main part 1 department, the food of this moment still can meet the arc structure valve 3 that lies in the upper reaches, constitutes the resistance to food backflow by the arc structure valve 3 of upper reaches, consequently, the degree of difficulty of food reverse circulation is greater than when support main part 1 inner chamber is equipped with an arc structure valve 3. That is, the structure of the present embodiment has a greater effect on reducing the probability of food regurgitation than when an arc-shaped structural valve 3 is provided in the inner cavity of the stent body 1.
Example 3:
referring to fig. 1, on the basis of the arc-shaped structural valve 3 of embodiment 1 or embodiment 2, the stopper unit of the arc-shaped structural valve 3 of the present embodiment includes three arc-shaped structural valves 3 spaced apart from each other along the axial direction of the stent body 1 on the inner wall of the stent body 1.
It should be noted that, for the three arc-shaped structural valves 3 in the present embodiment, arc-shaped structural valves 3 with the same size and specification may be optionally provided, and the small curvature portion 301 is preferably designed to be an axisymmetric structure.
The three arc-shaped structure valves 3 are obliquely arranged on the inner wall of the bracket main body 1, and the three arc-shaped structure valves 3 are distributed in a dislocation structure relative to the inner wall of the bracket main body 1; and an included angle of 120 degrees is formed between every two arc-shaped structural valves 2 in the three arc-shaped structural valves 3, namely, the three arc-shaped structural valves 3 jointly communicate with a dislocation blocking structure of 360 degrees, so that a blocking effect on backflow food is formed.
The design of the present embodiment is the same as that of embodiment 2, and the difficulty of food reverse circulation is increased by the dislocation distribution of the positions of the different arc-shaped valves 3, so as to reduce the possibility of food reverse circulation. The principle of the resistance to the reverse circulation of food, which is achieved by the dislocation distribution of the arc-shaped structural valves 3 in this embodiment, is the same as that of embodiment 2, and the description of this embodiment is omitted.
Example 4:
referring to fig. 1 and 4, on the basis of embodiment 1, embodiment 2 or embodiment 3, the stopper unit of the arc-shaped structural valve 3 of the present embodiment includes four arc-shaped structural valves 3 spaced apart from each other along the axial direction of the stent body 1 on the inner wall of the stent body 1.
It should be noted that, for the four arc-shaped structural valves 3 in the present embodiment, the arc-shaped structural valves 3 with the same size and specification may be optionally provided, and the small curvature portion 301 is preferably designed to be an axisymmetric structure.
The four arc-shaped structure valves 3 are obliquely arranged on the inner wall of the bracket main body 1, and the four arc-shaped structure valves 3 are distributed in a dislocation structure relative to the inner wall of the bracket main body 1; every two arc-shaped structural valves 3 are arranged at an included angle of 90 degrees. Namely, the four arc-shaped structural valves 3 form a dislocation blocking structure with 360 degrees together, so that a blocking effect on backflow food is formed.
Alternatively, the four arc-shaped structural valves 3 of the present embodiment may be distributed as follows: the small curvature 301 of the second arc-shaped structural valve 3 of the four arc-shaped structural valves 3 along the food flow direction is located right below the large curvature 303 of the first arc-shaped structural valve 3; and the small curvature part 301 of the third arc-shaped structural valve 3 is vertically staggered relative to the small curvature part 301 of the second arc-shaped structural valve 3; the small curvature 301 of the fourth arcuate structural valve 3 is located directly below the large curvature 303 of the third arcuate structural valve 3.
The design of the present embodiment is the same as that of embodiment 2 or embodiment 3, and the difficulty of food reverse circulation is increased by the dislocation distribution of the positions of the different arc-shaped valves 3, so as to reduce the possibility of food reverse circulation. The principle of the resistance to the reverse circulation of food, which is achieved by the dislocation distribution of the arc-shaped structural valves 3 in this embodiment, is the same as that of embodiment 2, and the description of this embodiment is omitted.
It should be further noted that, in this embodiment, the four arc-shaped structural valves 3 are configured in a specific dislocation distribution manner, so that, when viewed from the top view of the inner cavity of the overall stent body 1, the four arc-shaped structural valves 3 form a full coverage of 360 degrees relative to the radial direction of the inner cavity of the stent body 1, so that, basically, by using this structure of this embodiment, the effect of reducing the risk of food reflux is already better, and more arc-shaped structural valves 3 can be provided, but, in view of saving the production cost, the comprehensive factors of the effect of reducing the risk of food reflux are considered, and the four arc-shaped structural valves 3 are provided in the inner cavity of the stent body 1 to be a more reasonable structure.
Example 5:
on the basis of the anti-reflux stent for esophagus in embodiment 1, the anti-reflux valve of the anti-reflux stent for esophagus provided in this embodiment adopts the spiral structure valve 6, food is suitable for circulating along the spiral structure, two or three or four spiral structure valves 6 in this embodiment are selected, when a plurality of spiral structure valves 6 are arranged, the spiral directions of the plurality of spiral structure valves 6 are different, so that food can smoothly pass through the plurality of spiral structure valves 6 when circulating in the forward direction, and the principle of different arrangement of the spiral directions can refer to the anti-reflux stent for esophagus in embodiment 2 or embodiment 3 or embodiment 4, so as to form a blocking effect of 360 degrees in the food reflux process.
Example 6:
on the basis of the anti-reflux stent for esophagus according to embodiment 1, the anti-reflux valve of the anti-reflux stent for esophagus according to the embodiment adopts the planar structure valve 7, the planar structure valve 7 is obliquely arranged relative to the inner wall of the esophagus, and the planar structure valve 7 is suitable for rotating relative to the inner wall of the esophagus along the middle part of the planar structure valve 7, so that in the food circulation process, the pressure of food enables the planar structure valve 7 to rotate relative to the inner wall of the esophagus, and the food circulation is facilitated.
It should be noted that, the planar structure valves 7 in this embodiment may be alternatively provided in two, three, or four, and the plurality of planar structure valves 7 may be offset with respect to the oblique direction of the inner wall of the esophagus, so that the plurality of planar structure valves 7 may form a 360-degree blocking effect with respect to the inner wall of the esophagus.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention and are more fully described herein with reference to certain specific embodiments thereof, it being understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover all modifications, equivalents, alternatives, and improvements falling within the spirit and principles of the invention.
In the description of the present patent, it should be understood that the terms "about" and "about" are used herein to describe the present patent and simplify the description by referring to the orientation or positional relationship, and do not necessarily indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the patent.
In the present patent, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present patent will be understood by those skilled in the art according to the specific circumstances.
In the description of the present patent, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the product of the present patent, are merely for convenience of describing the present patent and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the patent of the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In this patent, unless expressly stated or limited otherwise, a first feature may be located above or below a second feature and may include first and second features being in direct contact, or may include first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.
Claims (7)
1. An anti-reflux stent for esophagus comprising: the bracket comprises a bracket main body and ports which are respectively arranged at two end parts of the bracket main body in an integrated mode, wherein a channel suitable for food circulation is formed between the ports in the inner cavity of the bracket main body;
a stop unit which is suitable for preventing food in the channel from flowing back is arranged in the inner cavity of the bracket main body;
the stop unit comprises at least one backflow prevention valve which is obliquely arranged relative to the inner cavity wall of the bracket main body;
the anti-reflux valve adopts an arc-shaped structure valve;
the arc-shaped structure valve comprises a large curvature part and a small curvature part which are integrally formed into an arc-shaped structure; wherein the method comprises the steps of
The small curvature part is arranged near one side of the food inflow; and
the arc opening of the arc structure valve faces to one side of food inflow;
the edge of the small curvature part is connected with the inner cavity wall of the bracket main body;
the edge of the large curvature part is connected with the inner cavity wall of the bracket main body by 1/3-1/2 part of the edge length of the large curvature part which extends from any end connected with the small curvature part along the edge of the large curvature part to the whole, and a gap suitable for food circulation is formed between the edge of the large curvature part where the large curvature part is not connected with the inner cavity wall of the bracket main body and the inner cavity wall of the bracket main body.
2. The esophageal anti-reflux stent of claim 1, wherein a portion of the edge of the large curvature extending from either end connected to the small curvature along the edge of the large curvature to 1/2 of the length of the entire edge of the large curvature is connected to the luminal wall of the stent body.
3. The esophageal reflux-preventing stent of claim 1, wherein the stop unit comprises two of the arcuate structural valves spaced apart along the axial direction of the stent body at the stent body lumen wall;
the two arc-shaped structure valves are obliquely arranged on the inner wall of the bracket main body, and are distributed in a staggered structure relative to the inner wall of the bracket main body, wherein one arc-shaped structure valve is arranged in a forward direction, and the other arc-shaped structure valve is arranged in a reverse direction.
4. The esophageal reflux-preventing stent of claim 1, wherein the stop unit comprises three of the arcuate structural valves spaced apart along the axial direction of the stent body at the stent body lumen wall;
the three arc-shaped structure valves are obliquely arranged on the inner wall of the bracket main body, and are distributed in a dislocation structure relative to the inner wall of the bracket main body; and
each two of the three arc-shaped structural valves are arranged at an included angle of 120 degrees.
5. The esophageal reflux-preventing stent of claim 1, wherein the stop unit comprises four of the arcuate structural valves spaced apart along the axial direction of the stent body at the stent body lumen wall;
the four arc-shaped structure valves are obliquely arranged on the inner wall of the bracket main body, and are distributed in a dislocation structure relative to the inner wall of the bracket main body; and
each two arc-shaped structure valves of the four arc-shaped structure valves are arranged at an included angle of 90 degrees.
6. The esophageal reflux-preventing stent of claim 1, wherein the reflux-preventing valve is a spiral valve.
7. The esophageal reflux-preventing stent of claim 1, wherein the reflux-preventing valve is a planar valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811522334.XA CN109481106B (en) | 2018-12-13 | 2018-12-13 | Anti-reflux bracket for esophagus |
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| CN201811522334.XA CN109481106B (en) | 2018-12-13 | 2018-12-13 | Anti-reflux bracket for esophagus |
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| CN109481106A CN109481106A (en) | 2019-03-19 |
| CN109481106B true CN109481106B (en) | 2023-11-10 |
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| CN113599019B (en) * | 2021-09-30 | 2021-12-07 | 江苏伊凯医疗器械有限公司 | Anti-backflow bracket for esophagus |
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| US5314473A (en) * | 1989-07-20 | 1994-05-24 | Godin Norman J | Prosthesis for preventing gastric reflux into the esophagus |
| SU1754073A1 (en) * | 1990-04-09 | 1992-08-15 | Ростовский медицинский институт | Method for treating achalasia of the cardia |
| RU2179411C2 (en) * | 1999-05-18 | 2002-02-20 | Красноярская государственная медицинская академия | Method for performing antireflux operation on short esophagus |
| CN2595394Y (en) * | 2002-11-11 | 2003-12-31 | 杨西群 | Titanium-nickel memory alloy anti-back flow esophagus inner support frame |
| IE20060946A1 (en) * | 2005-12-23 | 2007-08-08 | Vysera Biomedical Ltd | A medical device suitable for treating reflux from a stomach to an oesophagus |
| CN202146373U (en) * | 2011-06-26 | 2012-02-22 | 孙晓东 | Backflow preventive covered esophagus stent |
| CN108778184A (en) * | 2016-03-07 | 2018-11-09 | 波士顿科学国际有限公司 | Esophageal Stent including valve member |
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|---|---|
| CN109481106A (en) | 2019-03-19 |
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