Prostate stent
By designing a prostate stent with polyurethane elastomer membrane installed on the inner and outer surfaces, combined with the inward concave curved triangle structure and the design of connecting wire and metal frame, the problem of prostate stent easy displacement and bridge effect in the prior art has been solved, and better urethral fit and stone prevention effects have been achieved.
Patent Information
- Application Number
- CN202421285465.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-06
AI Technical Summary
Existing prostate stents are prone to displacement after long-term use, and due to the mismatch between the stent and the urethra, a bridge effect is easily formed, resulting in the occurrence of stones.
A prostate stent is designed, which includes a prostate stent body with a polyurethane elastomer film provided on the inner and outer surfaces. The first part of the stent body is a concave curved triangular structure, which is connected to the metal frame of the second part of the stent by connecting wires to prevent the stent from moving up and down along the urethra, and avoid the bridge effect through the elastomer film.
It effectively avoids the stone phenomenon caused by prostate stents remaining in the body for a long time, and prevents the stent from being displaced through a stable stent structure, improves the fit between the urethra and the stent, and reduces the occurrence of stones.
Smart Images
Figure CN222640682U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a prostate stent. Background Art
[0002] In recent years, with the change of people's working and living styles, more and more people have formed the habit of sitting for a long time. In the early years, prostate enlargement often occurred in the elderly, but now it is becoming younger and younger. Prostate enlargement can squeeze the urethra, causing male patients to have difficulty urinating, and even cause urethral stones and other problems, affecting the normal life of patients and causing pain to patients.
[0003] The prostate stents currently used in clinical practice expand the urinary tract by dilation, thereby solving the urination problem. However, the stent is prone to displacement in the urethra for a long time. The stents are mostly cylindrical, and no prostate urethra is a fairly regular cylindrical shape. It is difficult for the stent and urethra to match completely. A significantly enlarged prostate is often combined with a curved and irregular prostate urethra. The stent and the prostate urethra wall cannot fit closely together, forming a bridge effect, which is prone to stones.
[0004] In order to solve the above problems, a prostate stent is proposed in the present application. Utility Model Content
[0005] Based on the technical problems existing in the background technology, the utility model proposes a prostate stent.
[0006] The utility model provides a prostate stent, comprising a prostate stent body;
[0007] The inner and outer surfaces of the prostate stent body are provided with polyurethane elastomer films;
[0008] The prostate stent body comprises a first stent body, a connecting wire and a second stent body;
[0009] The first part of the stent body and the second part of the stent body are connected by a connecting wire;
[0010] The first part of the bracket body is a concave curved triangle structure.
[0011] Preferably, the first part of the bracket body includes a metal skeleton of the first part of the bracket main body part and a skeleton of the first part of the bracket closing part. The metal skeleton of the first part of the bracket main body part is connected to the skeleton of the first part of the bracket closing part. The metal skeleton of the first part of the bracket main body part presents an inward-concave curved triangular spiral structure. The three sides of the metal skeleton of the first part of the bracket main body form an inward-concave arc surface. The end of the connecting wire away from the metal skeleton of the second part of the bracket is connected to the skeleton of the closing part of the first part of the bracket.
[0012] Preferably, bending points A, B, C, D, E and F are formed at the triangular vertices of the metal skeleton of the main body of the first part of the bracket respectively.
[0013] Preferably, the bent portion at the triangular vertices of the metal skeleton of the main body of the first part of the stent is in a spiral cross-opening structure.
[0014] Preferably, a reinforcing rod is installed on the inner side of the triangular vertices of the metal frame of the main body of the first part of the bracket.
[0015] Preferably, the second part of the bracket body is a second part of the bracket metal frame, the second part of the bracket metal frame is formed by a wave shape to form an open conical cylindrical structure, and the end of the connecting wire away from the closing part of the first part of the bracket is connected to the second part of the bracket metal frame.
[0016] The above technical solution of the utility model has the following beneficial technical effects:
[0017] 1. By designing the first part of the prostate stent body into a concave curved triangle, it fits the prostate urethra after prostate hypertrophy, avoiding the prostate stent body from being left in the body for a long time and causing stones;
[0018] 2. The first part of the stent body, the connecting wire and the second part of the stent metal frame are arranged on the prostate stent body, the first part of the stent body is inserted through the prostate urethra after prostate hypertrophy, hyperplasia and canceration, the second part of the stent metal frame is inserted into the urethra below the urethral sphincter, the connecting wire passes through the urethra below the muscle, and the first part of the stent body and the second part of the stent metal frame are connected along the urethra to prevent the prostate stent body from moving up and down along the urethra;
[0019] 3. The polyurethane elastomer membranes arranged on the inner and outer surfaces of the prostate stent body fit with the prostate and urinary tract when the stent is opened, thereby avoiding the bridge effect and preventing the formation of stones. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic structural diagram of a prostate stent proposed by the utility model.
[0021] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the horizontal section of the first part of the bracket.
[0022] Figure 3 This is a schematic diagram of the structure of the metal part in a prostate stent proposed by the utility model.
[0023] Figure 4 For this utility model Figure 3Schematic diagram of the local structure in.
[0024] Figure markings: 1. prostate stent body; 10. first part stent body; 101. first part stent main body part metal skeleton; 1011. bending point A; 1012. bending point B; 1013. bending point C; 1014. bending point D; 1015. bending point E; 1016. bending point F; 1017. reinforcing rod; 102. first part stent closing part skeleton; 11. connecting wire; 12. second part stent body; 121. second part stent metal skeleton. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0026] like Figure 1-4 As shown, a prostate stent proposed by the utility model includes a prostate stent body 1;
[0027] The inner and outer surfaces of the prostate stent body 1 are provided with polyurethane elastomer films;
[0028] The prostate stent body 1 comprises a first stent body 10, a connecting wire 11 and a second stent body 12;
[0029] The first part of the stent body 10 is connected to the second part of the stent body 12 by a connecting wire 11;
[0030] The first part of the bracket body 10 is a concave curved triangle structure.
[0031] In a specific embodiment, the first part of the bracket body 10 includes a first part of the bracket main body part metal skeleton 101 and a first part of the bracket closing part skeleton 102. The first part of the bracket main body part metal skeleton 101 is connected to the first part of the bracket closing part skeleton 102. The first part of the bracket main body part metal skeleton 101 is a concave curved triangular spiral structure. The three sides of the first part of the bracket main body part metal skeleton 101 form a concave arc surface. The end of the connecting wire 11 away from the second part of the bracket metal skeleton 121 is connected to the first part of the bracket closing part skeleton 102.
[0032] It should be noted that: the metal skeleton 101 of the first part of the stent body 10 is spirally formed by shape memory alloy wire, and the metal skeleton 101 of the first part of the stent body is wound up from the first part of the stent closing part skeleton 102 and starts to be wound in a curved triangular spiral. Since the first part of the stent body 10 is designed to be a concave curved triangle structure, the circumferential extrusion deformation of the prostatic urethra part is relatively uniform, and the inside of the prostatic urethra part is tightly attached to the outside of the first part of the stent body 10, thereby avoiding the adverse clinical phenomenon of stones formed by gaps between the outside of the prostatic stent body 1 and the prostatic urethra part; due to the structural characteristics of the concave curved triangle of the first part of the stent body 10, the tissue forms a stretched and embedded state, and the prostatic stent body 1 can avoid radial rotation in the urethra as long as it is placed in the appropriate position of the urethra.
[0033] In a specific embodiment, the diameter of the inscribed circle of the curved triangle of the concave cross-section of the first portion of the bracket body 10 is 5 mm-7 mm.
[0034] In a specific embodiment, the polyurethane elastomer film is a uniform, smooth, non-porous film with a thickness of 100 microns.
[0035] In a specific embodiment, the hardness of the polyurethane elastomer film is 70A hardness material; the thickness of the polyurethane elastomer film is 50-100 microns.
[0036] In a specific embodiment, a bending point A1011, a bending point B1012, a bending point C1013, a bending point D1014, a bending point E1015 and a bending point F1016 are formed at the triangular vertices of the metal skeleton 101 of the main body of the first bracket.
[0037] It should be noted that: bend and spirally wind in the opposite direction at the bending point A1011 at the first vertex of the triangle of the metal skeleton 101 of the main part of the first part of the bracket, and then bend and spirally wind in the opposite direction at the bending point B1012 at the first vertex; bend and spirally wind in the opposite direction at the bending point C1013 at the second vertex, and then bend and spirally wind in the opposite direction at the bending point D1014 at the second vertex; bend and spirally wind in the opposite direction at the bending point E1015 at the third vertex, and then bend and spirally wind in the opposite direction at the bending point F1016 at the third vertex, and repeat the spiral winding in this way.
[0038] In a specific embodiment, the bent portion at the triangular vertices of the metal skeleton 101 of the first bracket main body is in a spiral cross-opening structure.
[0039] It should be noted that: through the spiral cross-opening structure, when the metal skeleton 101 of the first part of the stent body is squeezed by the urethral tissue, it is easy to embed into the urethral tissue, providing friction force for the prostate stent body 1 to prevent radial rotation and axial movement.
[0040] In a specific embodiment, a reinforcing rod 1017 is installed on the inner side of the triangular vertices of the metal frame 101 of the main body of the first bracket.
[0041] It should be noted that the reinforcing rod 1017 is provided to ensure the axial stability of the metal skeleton 101 of the first part of the stent body, and also enhance the radial support force of the metal skeleton 101 of the first part of the stent body, which is more effective in reconstructing the urethra for patients with prostatic hypertrophy and urethral curvature.
[0042] In a specific embodiment, the shape memory alloy wire wound around the metal skeleton 101 of the main body of the first part of the bracket is a round wire or a strip wire. The diameter of the round wire is 0.15-0.25 mm, and the thickness of the strip wire is 0.15 mm. During the specific molding process, it can be woven or laser cut, and then heat-treated to form a spirally concave curved triangle.
[0043] In a specific embodiment, the metal skeleton 101 of the main body of the first stent is formed by spirally winding a single wire or multiple wires, and specifically, a single wire is used for spiral winding.
[0044] In a specific embodiment, the skeleton 102 of the closing portion of the first stent is wound in a wave shape, and the external shape completes the transition from the concave curved triangle of the metal skeleton 101 of the first stent main body to a cylinder, which is consistent with the changes in the male urethra anatomical structure.
[0045] In a specific embodiment, the small conical parts of the first part stent body 10 and the second part stent body 12 of the prostate stent body 1 are connected by a connecting wire 11, and both ends of the prostate stent body 1 are the large conical parts of the first part stent body 10 and the second part stent body 12, so that the prostate stent body 1 can be prevented from moving along the axis of the urethra. The connecting wire 11 is arranged to be single or multiple, and the shape is spiral, straight or curved.
[0046] In a specific embodiment, the second part bracket body 12 is a second part bracket metal skeleton 121, which is an integrally formed wave-shaped conical cylindrical structure with an opening, and the end of the connecting wire 11 away from the closing part skeleton 102 of the first part bracket is connected to the second part bracket metal skeleton 121.
[0047] It should be noted that after the prostate stent body 1 is placed into the urethra, the prostate stent body 1 can be pulled out in a strip shape by grasping the starting part of the opening of the second part of the stent metal frame 121 .
[0048] In a specific embodiment, the connection wire 11 and the metal skeleton 101 of the main body part of the first stent are processed and formed, and the skeleton 102 of the closing part of the first stent and the metal skeleton 121 of the second stent are processed and formed.
[0049] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.
Claims
1. A prostate stent, comprising a prostate stent body (1), characterized in that: The inner and outer surfaces of the prostate stent body (1) are provided with polyurethane elastomer films; The prostate stent body (1) comprises a first stent body (10), a connecting wire (11) and a second stent body (12); The first part of the stent body (10) and the second part of the stent body (12) are connected via a connecting wire (11); The first part of the bracket body (10) is a concave curved triangle structure.
2. A prostate stent according to claim 1, characterized in that: The first part of the bracket body (10) comprises a first part of the bracket main body part metal skeleton (101) and a first part of the bracket closing part skeleton (102), the first part of the bracket main body part metal skeleton (101) is connected to the first part of the bracket closing part skeleton (102), the first part of the bracket main body part metal skeleton (101) is an inward-concave curved triangular spiral structure, the three sides of the first part of the bracket main body part metal skeleton (101) form an inward-concave arc surface, and the end of the connecting wire (11) away from the second part of the bracket metal skeleton (121) is connected to the first part of the bracket closing part skeleton (102).
3. A prostate stent according to claim 2, characterized in that: The triangular vertices of the metal skeleton (101) of the main body of the first part of the bracket respectively form a bending point A (1011), a bending point B (1012), a bending point C (1013), a bending point D (1014), a bending point E (1015) and a bending point F (1016).
4. A prostate stent according to claim 3, characterized in that: The bent portion of the metal frame (101) of the main body of the first stent at the triangular apex is in a spiral cross-opening structure.
5. A prostate stent according to claim 3, characterized in that: A reinforcing rod (1017) is installed inside the triangular vertices of the metal frame (101) of the main body of the first bracket.
6. A prostate stent according to claim 5, characterized in that: The second part of the bracket body (12) is a second part of the bracket metal frame (121), and the second part of the bracket metal frame (121) is formed by a wave shape to form a tapered cylindrical structure with an opening, and the end of the connecting wire (11) away from the closing part of the first part of the bracket frame (102) is connected to the second part of the bracket metal frame (121).