An adjustable esophageal cardia particle stent and a gastric tube comprising the same

Abstract

The application discloses a kind of adjustable esophageal cardiac particle stents and including its gastric tube, particle stent includes stent body, swimming ring-shaped air bag, the stent body is made of elastic medical material, overall is smooth cylinder, cylinder cavity surrounded by cylinder wall is used for food to pass through;The stent body includes upper cylinder body and lower cylinder body, the lower cylinder body is surrounded into cylinder by at least three tiles, at least one particle bin is provided on each tile, the particle bin is provided with loading port and clamping area;Swimming ring-shaped air bag is fixedly arranged in the cylinder cavity, located at the intersection of multiple tiles, the swimming ring-shaped air bag is connected with inflation pipeline.Thereby, the adjustable esophageal cardiac particle stent of the application can be taken out to adjust dosage at any time, and can be expanded at cardiac position to adapt to the shape of stomach wall, realize effective irradiation to cardiac position tumor.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to an adjustable esophageal cardiac particle stent and a gastric tube comprising the same. BACKGROUND

[0002] According to the esophageal cancer lesion, resection can be resected, and radiotherapy can be performed. However, due to various objective reasons, some severe and advanced patients have no way to perform conventional resection and radiotherapy surgery. The main direction of medical treatment tends to improve the survival quality of patients, that is, to keep the esophagus unobstructed as much as possible and avoid the tumor from pressing and occluding the esophagus. The existing popular treatment method is to place an elastic mesh stent made of titanium metal at the tumor position, which relies on the elastic expansion force of the stent to expand the esophagus pressed and occluded by the tumor, keep the esophagus unobstructed, and enable the patient to eat normally. However, this method has the following disadvantages:

[0003] First, the price is high. Titanium is a rare metal with limited resources, resulting in high product prices.

[0004] Second, since this type of stent is used independently, in order to avoid displacement after placement, the stent itself is made into a mesh shape and supported on the esophageal sidewall, relying on friction to fix it in the corresponding position, so it cannot be adjusted after placement.

[0005] Third, the above method only physically supports the esophagus, but has no therapeutic effect on the lesion site. As the tumor continues to grow, when the size of the tumor exceeds the length of the mesh stent, the esophagus will be pressed and occluded again outside the stent, resulting in the loss of the mesh stent.

[0006] Especially when the tumor occurs at the cardiac position, the traditional mesh stent cannot carry the drug to the appropriate position.

[0007] Fourth, even if the radioactive particles with therapeutic effect are tied to the mesh elastic stent to achieve the therapeutic effect on the tumor, due to the above reasons, the mesh elastic stent cannot be adjusted after placement, resulting in the placement of the drug being one-time only, and the drug amount cannot be adjusted according to the development of the tumor.

[0008] Fifth, although the effective treatment period of the radioactive particles is 6 months, many patients will suffer from radiation esophagitis after continuous use for several weeks, which is extremely painful. However, the existing method of placing radioactive particles is difficult to remove, causing great pain to the patients.

[0009] Therefore, it is a difficult problem for those skilled in the art to develop a position-adjustable particle stent, especially a particle stent suitable for the cardiac position. SUMMARY

[0010] The technical problem to be solved by the present invention is to provide an adjustable esophageal sphincter particle stent.

[0011] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0012] An adjustable esophageal sphincter particle stent includes a stent body and a swimming ring-shaped air bladder. The stent body is made of elastic medical material and is generally smooth cylindrical. The cavity formed by the cylinder wall is used for food to pass through.

[0013] The support body includes an upper cylinder and a lower cylinder. The lower cylinder is formed into a cylindrical shape by at least three wall tiles. Each wall tile is provided with at least one particle chamber. The particle chamber is provided with a filling port and a clamping area.

[0014] The swimming ring-shaped airbag is fixedly installed inside the cylindrical cavity and located at the intersection of multiple wall tiles. The swimming ring-shaped airbag is connected to an inflation tube.

[0015] This particle scaffold is attached and fixed to a gastric tube. There are various fixation methods, such as adhesive bonding, binding with surgical sutures, or simply using interference fit between the particle scaffold and the gastric tube.

[0016] Compared with the prior art, the present invention has the following technical effects:

[0017] First, since the gastric tube serves as the carrier for entering and exiting the human body, the particle scaffold no longer needs to rely on the friction between itself and the esophageal sidewall to fix its position. Therefore, its outer surface can be made into a smooth surface, reducing physical damage to the esophagus.

[0018] Secondly, the particle scaffold is fixed to the gastric tube. There is no relative displacement between the particle scaffold and the gastric tube, and the particle scaffold itself has a smooth surface. Therefore, by adjusting the length of the gastric tube in the body, the specific position of the particle chamber in the esophagus can be adjusted very easily, which greatly reduces the difficulty of placing the particles.

[0019] Because of the smooth surface of the particle chamber, it can be repeatedly removed and inserted into the body, so the drug dosage can be adjusted in a timely manner according to the development of the lesion.

[0020] The stent is placed at the cardia, with the airbag positioned at the cardia entrance. By inflating the airbag, it expands into a swimming ring shape, stretching the three wall tiles at the end of the stent body until they are basically in contact with the stomach wall. Radiation particles are then placed on the wall tiles, achieving the effect of irradiation therapy for tumors at the cardia.

[0021] Based on the above technical solution, the present invention can be further improved as follows.

[0022] Further, the upper cylinder of the stent body is provided with at least one particle bin, and the particle bins on the upper cylinder and the particle bins on the wall tiles can be communicated or independently arranged. In this way, the particles can be carried to the required position around the cardia.

[0023] Further, a conical cylinder is further included, the conical cylinder is provided with a through hole matched with the cylinder cavity, and the conical cylinder is fixedly arranged at both ends of the stent body.

[0024] The beneficial effect of the above further scheme is that the resistance of the particle stent when moving in the esophagus can be reduced, and the discomfort of the patient during use can be reduced. The conical cylinder can be produced separately and fitted on both ends of the particle stent. The end surface of the particle stent connected with the conical cylinder can be provided with a matched connecting structure, such as a mortise and tenon structure, a buckle structure, etc., or can be fixed by gluing and the like.

[0025] Further, the conical cylinder can also be integrally produced with the stent body, such as one-time injection molding during injection molding, so as to avoid separate assembly during use and improve the convenience during use.

[0026] Further, when the particle bins are multiple, the multiple particle bins are uniformly arranged along the circumferential direction of the stent body. The uniform arrangement can make the release of the medicament more uniform during use, or can make it unnecessary to consider the placement angle and the like when placing the particle bin, so as to facilitate finding a suitable position for placing the particle.

[0027] Further, at least part of the particle bins are arranged along the axial direction of the stent body.

[0028] The beneficial effect of the above further scheme is that the stent body can be made into different sizes as required, from 5 cm to 200 cm. The particle bins extend along the axial direction, and the radioactive particles can be placed in the appropriate position one by one from one end of the particle bin. The particle bins have fewer openings and are in a straight line, so the processing is simple, the particles are convenient to place, the particles are firmly clamped, and will not shift during use. According to the requirement, all the particle bins can be arranged along the axial direction, or only part of the particle bins can be arranged along the axial direction.

[0029] Further, at least part of the particle bin is arranged radially along the stent body or is arranged radially along the stent body. Since the particle is placed in the particle bin by using a push pin, and the diameter of the push pin generally cannot exceed the diameter of the particle bin itself, the diameter of the general radioactive particle is only 0.8 mm, in order to realize effective clamping of the particle, the inner diameter of the particle bin is less than 0.8 mm, and the diameter of the push pin required for placing the particle is smaller. In this case, it is difficult for the push pin to withstand the force when pushing the particle 1000-2000 mm, at this time, the axial particle bin can be arranged in sections, or the particle bin can be arranged radially or obliquely. In this way, the size of the push pin required for placing the particle does not need to be too large, and the strength requirement is not so high.

[0030] Further, the stent body is provided with a transparent observation window, and the position of the observation window is matched with the particle bin. It is convenient to observe the placement position of the particle, and to control the distance between the particles. In order to control more conveniently, the stent body can also be provided with a size mark.

[0031] Further, it further comprises a folding sleeve, the folding sleeve is provided with an inner hole matched with the barrel cavity, the folding sleeve is sleeved on the end of the lower barrel body of the stent body, and is used for keeping the three-petal wall tile in a folded state. In this way, when placed in the body, the folding sleeve can ensure that the wall tile at the lower end of the particle stent remains in a folded state, which is convenient for delivery into the body. The folding sleeve only needs to surround the head of the wall tile, and cannot exert too much force. When delivered to the position, the air bag is inflated, the wall tile is forced to expand outward, so as to be separated from the folding sleeve, and the folding sleeve itself falls off, and is discharged out of the body through the human digestive tract or attached to other devices.

[0032] A gastric tube comprises a hose body, and further comprises the adjustable esophageal cardia particle stent as described above. The adjustable esophageal cardia particle stent is fixed at the position of the hose body located at the cardia. The inflation pipeline is designed in one body with the hose body, and the inflation pipeline is provided with a one-way valve.

[0033] Compared with the prior art, the particle stent can be maintained at the cardia position by means of the hose body, and a part of the particle stent can be deformed by means of the air bag, so as to be attached to the stomach wall, and the tumor at the cardia position can be effectively treated by radiation. The particle stent itself is smooth, and is not fixed by the friction force between the particle stent itself and the esophagus. Therefore, if the patient's condition changes or feels uncomfortable, especially when suffering from radiation esophagitis, the particle stent can be removed from the body in time, so that the patient can rest and improve the quality of life. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a structure schematic view of the adjustable esophageal cardia particle stent of Example 1.

[0035] Figure 2 Structure diagram of example 1 without the gathering cap;

[0036] Figure 3 Structure diagram of example 1 without the gathering cap;

[0037] Figure 4 Structure diagram of example 2;

[0038] Figure 5 Structure diagram of example 2;

[0039] Figure 6 Structure diagram of example 3;

[0040] Figure 7 Structure diagram of example 3;

[0041] Figure 8 Structure diagram of example 3;

[0042] Figure 9 Structure diagram of a gastric tube with a cardia particle stent;

[0043] Figure 10 Structure diagram of a gastric tube joint.

[0044] In the drawings, the names of the components represented by the respective reference numerals are listed as follows:

[0045] 1, stent body;

[0046] 11, barrel cavity;

[0047] 12, particle bin;

[0048] 121, loading port;

[0049] 122, clamping area;

[0050] 13, wall tile;

[0051] 14, tapered barrel;

[0052] 15, observation window;

[0053] 2, swim ring-shaped air bag;

[0054] 3, inflation pipeline;

[0055] 31, one-way valve;

[0056] 4, gathering sleeve;

[0057] 5, hose body;

[0058] 6, joint;

[0059] 61. Airbag inflation nozzle

[0060] 62. Food dispensing port. Detailed Implementation

[0061] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0062] Example 1:

[0063] like Figure 1 As shown, an adjustable esophageal sphincter particle stent includes a stent body 1 and a swimming ring-shaped air bladder 2. The stent body 1 is made of medical silicone and is generally smooth cylindrical. The cavity 11 formed by the cylinder wall is used for food to pass through.

[0064] The support body 1 includes an upper cylinder and a lower cylinder. The upper cylinder is an integral cylindrical structure, while the lower cylinder is formed into a cylindrical shape by three-lobed wall tiles 13. It also includes a retractable sleeve 4, which is used to ensure that the three-lobed wall tiles 13 at the end of the particle support are in a retracted state when the particles are deployed.

[0065] like Figure 2 As shown, it is a structural schematic diagram omitting the gathering sleeve 4. Each wall tile 13 is provided with two particle chambers 12, which extend along the axial direction of the support body 1.

[0066] like Figure 3 As shown, particle chamber 12 extends through the entire cylindrical wall of the particle support. Note that the internal structure is shown for clarity. Figure 3 The drawing only shows part of the internal structure and does not show all the hidden lines.

[0067] The swim ring-shaped airbag 2 is fixedly installed inside the cylindrical cavity 11, located at the intersection of the three wall tiles 13. The swim ring-shaped airbag 2 is connected to an inflation tube 3, which can extend to the outside of the body in any form. However, because... Figures 1-3 The swimming ring-shaped air bladder is in an uninflated state, therefore... Figures 1-3 The location of the swim ring-shaped air bladder 2 is not shown in the drawing. Please refer to [reference needed]. Figure 8 As shown.

[0068] Example 2:

[0069] like Figures 4-5 As shown, unlike Example 1, in this example, the particle chamber 12 is arranged radially along the support body 1, that is, several holes are opened in the radial direction, and the particles are buried in the holes. Since the particle support itself is made of silicone, it is elastic and can firmly hold the particles to prevent them from falling off.

[0070] Example 3:

[0071] As Figures 6-7 shown, unlike example 1, in this example, a conical cylinder 14 is provided at both ends of the particle stent, which can be separately processed and fixed at both ends of the stent body by means of sleeving, pasting, buckling and the like. Of course, since the lower cylinder of the particle stent body 1 is surrounded by three pieces of wall tiles 13, the conical cylinder 14 provided at the lower end can also be correspondingly provided in three pieces, respectively provided at the end of the wall tile 13, and surrounded together to form a conical shape.

[0072] The conical cylinder 14 can also be designed integrally with the particle stent body 1, that is, directly formed in one piece during production, and does not need to be separately assembled during use.

[0073] In this example, the particle bin 12 is provided with a filling port 121 at one end away from the wall tile 13, and is closed at one end close to the wall tile 13. During use, particles are filled into the appropriate position from the filling port 121, and the end is closed to prevent the particles from falling off.

[0074] As Figure 8 shown, the thickness of the air bag after inflation is about 1 cm, and the maximum outer diameter can reach 6 cm, which will force the three pieces of wall tile 13 at the end to fully expand and adhere to the stomach wall, and then the particles can be set to the lesion area at the location of the cardiac gate, so as to effectively irradiate and treat the lesion area. The thickness of the swim ring-shaped air bag after inflation refers to the size spanned by the projection of the swim ring-shaped air bag on the plane of the axis of the particle stent; the outer diameter of the swim ring-shaped air bag after inflation refers to the size spanned by the projection of the swim ring-shaped air bag on the plane of the radial line of the particle stent.

[0075] Example 4:

[0076] As Figure 9 shown, a stomach tube includes a hose body 5 and an external connector 6, and further includes an adjustable esophageal cardiac particle stent, which is sleeved on the hose body 5 or integrally formed with the hose body 5. The particle stent includes a stent body 1 and a swim ring-shaped air bag 2, the stent body 1 is made of elastic medical material and has a smooth cylindrical shape as a whole, and a cylinder cavity 11 surrounded by a cylinder wall is used for passing food.

[0077] The stent body 1 includes an upper cylinder and a lower cylinder, the lower cylinder is surrounded by at least three pieces of wall tile 13 to form a cylindrical shape, each piece of wall tile 13 is provided with two particle bins 12, and the particle bin 12 is provided with a filling port 121 and a clamping area 122.

[0078] The swim ring-shaped air bag 2 is fixedly arranged in the cylinder cavity 11 and located at the intersection of the plurality of wall tiles 13, the swim ring-shaped air bag 2 is connected with a gas filling pipeline 3, and the adjustable esophageal cardiac particle stent is fixed at the position of the cardiac gate of the hose body 5.

[0079] The inflation pipe is designed as an integral part of the hose body 5, as shown in Figure 10 The outer connector 6 is Y-shaped, as shown, and includes two external interfaces, one of which is connected to the main channel-food delivery port 62 of the hose body 5 for conveying water and food, and the other of which is connected to the inflation pipe 3-air bag inflation nozzle 61 of the hose body 5 for inflating the swim ring-shaped air bag 2. A one-way valve 31 is arranged in the inflation interface of the outer connector 6 to prevent the swim ring-shaped air bag 2 from leaking air.

[0080] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An adjustable esophageal sphincter particle stent, characterized in that, It includes a support body and a swimming ring-shaped airbag. The support body is made of elastic medical silicone material and is generally smooth cylindrical. The cavity formed by the cylindrical wall is used for food to pass through. The stent body includes an upper cylinder and a lower cylinder. The lower cylinder is formed into a cylindrical shape by at least three wall tiles. Each wall tile is provided with at least one particle chamber. The particle chamber is provided with a filling port and has a smooth surface. It can be repeatedly removed and inserted from the body to adjust the drug dosage according to the development of the lesion. The swim ring-shaped airbag is fixedly installed inside the cylindrical cavity and located at the intersection of at least three of the wall tiles. The swim ring-shaped airbag is connected to an inflation tube. By inflating the airbag and expanding it into a swimming ring shape, the three wall tiles at the end of the stent body are stretched to a state that is basically in contact with the stomach wall. Radiation particles are placed on the wall tiles to achieve radiation therapy for tumors at the cardia. The adjustable esophageal sphincter particle stent also includes a conical tube or a retractable sleeve. The conical cylinder is provided with through holes that fit the cylinder cavity. The conical cylinder is fixed at both ends of the support body. The conical cylinder at the lower end of the cylinder body of the support body is configured as having multiple petals, the same number as the wall tiles. Each petal is respectively located at the end of the wall tile, and when they are gathered together, they form a cone shape. The retractable sleeve has an inner hole that fits the cylinder cavity. The retractable sleeve is fitted onto the lower end of the lower cylinder of the support body to keep the wall tile in a closed shape.

2. The adjustable esophageal sphincter particle stent according to claim 1, characterized in that, The upper cylinder of the support body is provided with at least one particle chamber.

3. The adjustable esophageal sphincter particle stent according to claim 2, characterized in that, The conical cylinder and the support body are designed as a single unit.

4. The adjustable esophageal sphincter particle stent according to claim 2, characterized in that, There are multiple particle chambers, and the multiple particle chambers are evenly arranged along the circumference of the support body.

5. The adjustable esophageal sphincter particle stent according to claim 2, characterized in that, At least a portion of the particle chambers are arranged along the axial direction of the support body.

6. The adjustable esophageal sphincter particle stent according to claim 2, characterized in that, At least a portion of the particle chambers are arranged radially along the support body or are inclined along the radial direction of the support body.

7. The adjustable esophageal sphincter particle stent according to claim 1, characterized in that, The support body is provided with a transparent observation window, and the position of the observation window is adapted to the particle chamber.

8. A gastric tube, comprising a flexible tube body, characterized in that, It also includes an adjustable esophageal cardia particle support as described in any one of claims 1-7, wherein the adjustable esophageal cardia particle support is fixed to the flexible tube body at the position of the cardia, and a one-way valve is provided in the inflation line of the adjustable esophageal cardia particle support.

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