Disposable ureteral stent

Abstract

The utility model discloses a disposable ureteral stent, and belongs to the field of medical instruments. The support comprises a support structure, the middle end comprises a tough film and a support body installed on the outer surface of the tough film, and an external film is installed on the outer surface of the support body. The whole middle end is supported through the arranged tough film, the middle end is prevented from being extruded by stone, when the inner wall of the urethra is damaged by a guide wire, the blood coagulation coating is used for performing blood coagulation treatment on the bleeding position of the inner wall of the urethra, secondary damage to a patient is avoided, the arranged smooth coating facilitates movement of the expansion end, and the expansion end is convenient to move. Due to the fact that the diameter of one end of the expanding end is larger than that of the middle end, the expanding end is used for expanding the urethra, the middle end can enter the urethra conveniently, after the support structure is inserted, the ureter is inserted into the support structure, the elastic ring makes contact with the outer wall of the ureter, stone is prevented from moving into the curled-up pipe, and the urethra dilator has the advantage of facilitating urination.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices, and specifically relates to a disposable ureteral stent. Background Art

[0002] A ureteral stent is a medical device used to treat ureteral stenosis or obstruction. It is usually made of flexible materials such as plastic or wire mesh and is designed in a tubular or spiral structure. The main function of the ureteral stent is to provide support and a passage inside the ureter to ensure that urine can flow smoothly through the narrowed or compressed area.

[0003] The existing Chinese patent with the publication number CN219375059U discloses a ureteral stent, including: a stent body, the stent body is tubular and has a main body through hole penetrating along the axis; and an anti-reflux structure, the anti-reflux structure is disposed around the outer wall of the stent body and protrudes from the outer wall surface of the stent body, and the anti-reflux structure is used to block the gap between the outer wall of the stent body and the inner wall of the ureter; and a one-way valve structure, the one-way valve structure is located at the tail end of the stent body, which can prevent the reflux of urine through the inner wall cavity of the ureteral stent. Using the ureteral stent provided by the utility model can prevent the reflux between the outer wall of the ureteral stent and the inner wall of the ureter, and at the same time prevent the reflux of the inner wall cavity of the ureteral stent.

[0004] Regarding the above related technologies, when the ureteral stent is inserted into the urethra and the stent body is in the urethra, if there are stones in the urethra, the stent body will be squeezed, resulting in the stent body squeezing the ureter, affecting the normal use of the ureter and the urine cannot be discharged normally.

[0005] Therefore, we propose a disposable ureteral stent to solve the problems raised above. Content of the Utility Model

[0006] Aiming at the above problems existing in the prior art, the purpose of the utility model is to provide a disposable ureteral stent.

[0007] To solve the above problems, the technical solution adopted by the utility model is as follows: a disposable ureteral stent, including a stent structure, the stent structure includes a discharge end and a urine discharge hole starting from the outer surface of the discharge end, one end of the discharge end is provided with a middle end, one end of the middle end is provided with an insertion end, and a dilation end is installed between the middle end and the insertion end;

[0008] The middle end includes a toughness film and a stent body installed on the outer surface of the toughness film, and an outer film is installed on the outer surface of the stent body.

[0009] Preferably, a moisture-absorbing coating is provided on the outer surface of the external membrane, and a blood coagulation coating is provided on the outer surface of the moisture-absorbing coating.

[0010] Preferably, the expansion end includes a filament layer and a covering film provided on the outer surface of the filament layer.

[0011] Preferably, a smooth coating is provided on the outer surface of the covering film, and the diameter of one end of the smooth coating is greater than the diameter of the middle end.

[0012] Preferably, the insertion end includes a curled tube and an elastic ring installed inside one end of the curled tube.

[0013] Preferably, a funnel tube is installed inside the curled tube, and one end of the funnel tube is connected to one end of the elastic ring.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] (1) For the disposable ureteral stent provided by the present utility model, the provided toughness film will support the entire middle end, preventing the middle end from being squeezed by stones. When the guide wire causes damage to the inner wall of the urethra, the provided blood coagulation coating coagulates the bleeding part of the inner wall of the urethra, avoiding secondary harm to the patient.

[0016] (2) For the disposable ureteral stent provided by the present utility model, when inserting the stent structure, the insertion end first enters the urethra, and then the expansion end enters the urethra. The entire expansion end is squeezed. The provided smooth coating facilitates the movement of the expansion end. Since the diameter of one end of the expansion end is greater than the diameter of the middle end, the expansion end is used to expand the urethra, facilitating the middle end to enter the urethra. After the stent structure is inserted, the ureter is inserted into the inside of the stent structure, and one end of the ureter moves out of the inside of the elastic ring along the inner wall of the funnel tube. The elastic ring contacts the outer wall of the ureter, preventing stones from moving into the inside of the curled tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the middle end structure of the present utility model;

[0019] Figure 3 is a schematic diagram of the expansion end structure of the present utility model;

[0020] Figure 4 is a schematic diagram of the insertion end structure of the present utility model.

[0021] In the figure: 1. Bracket structure; 11. Discharge end; 12. Middle end; 121. Resilient film; 122. Bracket body; 123. External film; 124. Moisture-absorbing coating; 125. Coagulation coating; 13. Expansion end; 131. Filament layer; 132. Covering film; 133. Smooth coating; 14. Insertion end; 141. Curled tube; 142. Elastic ring; 143. Funnel tube; 15. Urination hole. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0023] Embodiment 1: Please refer to Figure 1 and Figure 2 , a disposable ureteral stent, including a bracket structure 1, the bracket structure 1 includes a discharge end 11 and a urination hole 15 starting from the outer surface of the discharge end 11. One end of the discharge end 11 is installed with a middle end 12, one end of the middle end 12 is installed with an insertion end 14, and an expansion end 13 is installed between the middle end 12 and the insertion end 14.

[0024] The middle end 12 includes a resilient film 121 and a bracket body 122 installed on the outer surface of the resilient film 121. An external film 123 is installed on the outer surface of the bracket body 122. The set resilient film 121 will restore its original state due to its own resilience after being squeezed.

[0025] A moisture-absorbing coating 124 is provided on the outer surface of the external film 123, and a coagulation coating 125 is provided on the outer surface of the moisture-absorbing coating 124 for coagulating the bleeding part of the urethra.

[0026] In this embodiment: Before inserting the bracket structure 1, a guide wire will be inserted into the urethra. When the bracket structure 1 is inserted into the urethra along the guide wire, the set resilient film 121 will support the entire middle end 12 to prevent the middle end 12 from being squeezed by stones. When the guide wire damages the inner wall of the urethra, the set coagulation coating 125 will perform coagulation treatment on the bleeding part of the inner wall of the urethra to avoid secondary harm to the patient.

[0027] Embodiment 2: Please refer to Figure 3 and Figure 4 , the expansion end 13 includes a filament layer 131 and a covering film 132 provided on the outer surface of the filament layer 131. The open end of the filament layer 131 faces one end of the discharge end 11.

[0028] The outer surface of the covering film 132 is provided with a smooth coating 133. The diameter of one end of the smooth coating 133 is larger than that of the middle end 12, which facilitates the movement of the expansion end 13 in the urethra.

[0029] The insertion end 14 includes a curled tube 141 and an elastic ring 142 installed inside one end of the curled tube 141. The inner diameter of the elastic ring 142 is smaller than the inner diameter of the curled tube 141, reducing the distance between the ureter and the curled tube 141 and preventing stones from flowing between the curled tube 141 and the ureter.

[0030] A funnel tube 143 is installed inside the curled tube 141, and one end of the funnel tube 143 is connected to one end of the elastic ring 142. The smaller end inside the funnel tube 143 faces the side of the elastic ring 142.

[0031] In this embodiment: When inserting the stent structure 1, the insertion end 14 first enters the urethra, and then the expansion end 13 enters the urethra. The entire expansion end 13 is squeezed. The provided smooth coating 133 facilitates the movement of the expansion end 13. Since the diameter of one end of the expansion end 13 is larger than that of the middle end 12, the expansion end 13 is used to expand the urethra, facilitating the entry of the middle end 12 into the urethra. After the stent structure 1 is inserted, the ureter is inserted into the inside of the stent structure 1. One end of the ureter moves out from the inside of the elastic ring 142 along the inner wall of the funnel tube 143, and the elastic ring 142 comes into contact with the outer wall of the ureter, preventing stones from moving into the inside of the curled tube 141.

[0032] Working principle: When inserting the stent structure 1, the insertion end 14 first enters the urethra, and then the expansion end 13 enters the urethra. The provided smooth coating 133 facilitates the movement of the expansion end 13. After the stent structure 1 is inserted, the ureter is inserted into the inside of the stent structure 1. One end of the ureter moves out from the inside of the elastic ring 142 along the inner wall of the funnel tube 143, and the elastic ring 142 comes into contact with the outer wall of the ureter, preventing stones from moving into the inside of the curled tube 141. The provided coagulation coating 125 performs coagulation treatment on the bleeding part of the inner wall of the urethra, avoiding secondary harm to the patient.

[0033] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A disposable ureteral stent, comprising a stent structure (1), characterized in that: The support structure (1) comprises a discharge end (11) and a urination hole (15) starting from the outer surface of the discharge end (11); a middle end (12) is installed at one end of the discharge end (11); an insertion end (14) is installed at one end of the middle end (12); and an expansion end (13) is installed between the middle end (12) and the insertion end (14); The middle end (12) comprises a tough membrane (121) and a support body (122) mounted on the outer surface of the tough membrane (121), and an external membrane (123) is mounted on the outer surface of the support body (122).

2. The disposable ureteral stent according to claim 1, characterized in that: The outer surface of the external film (123) is provided with a hygroscopic coating (124), and the outer surface of the hygroscopic coating (124) is provided with a blood coagulation coating (125).

3. The disposable ureteral stent according to claim 1, characterized in that: The expansion end (13) comprises a filament layer (131) and a covering film (132) arranged on the outer surface of the filament layer (131).

4. The disposable ureteral stent according to claim 3, characterized in that: The outer surface of the covering film (132) is provided with a smooth coating (133), and the diameter of one end of the smooth coating (133) is larger than the diameter of the middle end (12).

5. The disposable ureteral stent according to claim 1, characterized in that: The insertion end (14) comprises a curled tube (141) and an elastic ring (142) installed inside one end of the curled tube (141).

6. The disposable ureteral stent according to claim 5, characterized in that: A funnel tube (143) is installed inside the curled tube (141), and one end of the funnel tube (143) is connected to one end of the elastic ring (142).

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