Recyclable prostate stent capable of preventing displacement

Abstract

The utility model relates to the technical field of prostate stents, and discloses an anti-displacement recoverable prostate stent which comprises a stent cap, a left supporting wire is fixedly connected to the top of the left side of the stent cap, a right supporting wire is fixedly connected to the bottom of the front end of the left side of the stent cap, and a lower supporting wire is fixedly connected to the rear end of the bottom of the left side of the stent cap. A fixing ring is fixedly connected to the middle of the left side of the support cap, a guiding pipe is arranged outside the support cap, a pushing pipe is arranged in the guiding pipe and slides in the guiding pipe to push the support, and the left side of the top of the left supporting wire and the left side of the top of the right supporting wire are provided with inwards-concave shapes. Continuous wavy protrusions are arranged on the right sides of the tops of the left supporting wire and the right supporting wire. According to the urethral stent, sphincter muscles in the urethra can be borne through the inwards-sunken recesses, so that the sphincter muscles are prevented from being damaged by expansion acting force of the stent, the actual acting effect of the stent is not affected, and the muscle functions of the stent are prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of prostate stents, in particular to a recyclable prostate stent capable of preventing displacement. Background Art

[0002] A prostate stent is a medical device used to treat prostate hyperplasia (BPH). BPH is a common male disease that causes the prostate to increase in size, compressing the urethra, leading to poor urine flow and urination problems. In order to alleviate these symptoms, existing technologies can provide different treatment methods depending on the severity of the symptoms and the patient's condition.

[0003] A prostate stent is a medical device used to treat prostate hyperplasia (BPH). BPH is a common male disease that causes the prostate to increase in size, compressing the urethra, leading to poor urine flow and urination problems. In order to alleviate these symptoms, existing technologies can provide different treatment methods depending on the severity of the symptoms and the patient's condition.

[0004] Prostate stents can be divided into two categories according to the duration of indwelling: long-term implantation and temporary implantation. Temporary implantation is for patients with mild to moderate BPH, those with contraindications to anesthesia, those with good bladder function, non-obstructive middle lobe, high bladder neck, and those who are elderly and at high risk of surgery and whose symptoms cannot be effectively improved by oral medication.

[0005] After searching, the existing Chinese patent publication number is: CN217510654U, which provides a variable diameter prostate stent system. This patent introduces an adjuster structure so that the stent can change its own diameter through adjustment, so that one specification of stent can be used to adapt to different patients, reducing the difficulty of stocking in hospitals and reducing the cost of use for patients.

[0006] Although the above patent can adjust and change the diameter size, so that a stent of one specification can be used to adapt to different patients, the above variable diameter prostate stent system still has the following problems: the prostate stent has weak supporting force and is easy to shift.

[0007] In view of the above problems, a retrievable prostate stent is proposed to prevent displacement. Utility Model Content

[0008] The utility model aims to provide a recyclable prostate stent which can prevent displacement, thereby solving the problem that the prostate stent in the background technology has weak supporting force and is easy to be displaced.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a recyclable prostate stent that prevents displacement, comprising a stent cap, a left supporting wire fixedly connected to the top left side of the stent cap, a right supporting wire fixedly connected to the bottom left front end of the stent cap, a lower supporting wire fixedly connected to the rear end of the bottom left side of the stent cap, a fixing ring fixedly connected to the middle left side of the stent cap, a guide tube arranged on the outside of the stent cap, a push tube arranged inside the guide tube, and the push tube slides inside the guide tube to push the stent, an inwardly concave shape is arranged on the left side of the top of the left and right supporting wires, and a continuous wavy protrusion is arranged on the right side of the top of the left and right supporting wires.

[0010] By adopting the above technical solution, the inwardly concave shape can support the urethral sphincter muscle and protect it from damage by the expansion force of the stent, so that the prostate hyperplasia tissue can quickly undergo ischemic necrosis and atrophy, and the urethra can be expanded as soon as possible, so that the treatment effect can be achieved more quickly.

[0011] As a further description of the above technical solution: the connection points between the left support wire, the right support wire and the lower support wire are distributed in a triangle, and the left support wire, the right support wire and the lower support wire are nickel-titanium memory alloy elastic wires.

[0012] By adopting the above technical solution, the nickel-titanium memory alloy elastic wire has shape memory properties, that is, it can still restore its original shape after being deformed.

[0013] As a further description of the above technical solution: the left supporting wire, the right supporting wire and the lower supporting wire are twisted in pairs in a twisted structure.

[0014] By adopting the above technical solution, the structural stability can be enhanced through the twisted structure.

[0015] As a further description of the above technical solution: the circular cavity at the front of the bracket cap is connected to the bracket, and the non-circular cavity at the rear of the bracket cap is connected to the push tube.

[0016] By adopting the above technical solution, it is convenient to control and adjust the angle of the stent during placement.

[0017] As a further description of the above technical solution: the rear end of the push tube is grooved and a recovery line is fixed thereon.

[0018] By adopting the above technical solution, the bracket cap is connected through the recovery line, so that the bracket can be pulled when the bracket is recovered; secondly, the push tube is fixed to prevent the push tube from falling off.

[0019] As a further description of the above technical solution: the bracket cap is overall in the shape of a stepped cylinder, and the inner part of the bracket cap has two cavities.

[0020] By adopting the above technical solution, the angle of the stent during insertion is adjusted by rotating the push tube to rotate the stent cap and then rotating the stent itself.

[0021] As a further description of the above technical solution: the push tube is a non-circular cavity structure.

[0022] By adopting the above technical solution, the push tube can be inserted into the rear cavity of the stent cap during use, and the stent cap can be pushed up to transport the stent forward. There is no fixed connection between the push tube and the stent cap, and the push tube can be pulled backward to be detached from the stent cap after the pushing is completed.

[0023] As a further description of the above technical solution: the outer diameter of the push tube is slightly smaller than the inner diameter of the rear end opening of the bracket cap, and the inner diameter of the guide tube is smaller than the outer diameter of the entire bracket.

[0024] By adopting the above technical solution, the inner diameter of the guide tube is smaller than the outer diameter of the stent, the stent is in a compressed state when placed inside the guide tube, there is no fixed connection between the push tube and the stent cap, and after the push tube is completed, it can be pulled back to separate from the stent cap.

[0025] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0026] 1. The utility model provides a recyclable prostate stent that prevents displacement. First, the inwardly concave shape of the depression can support the internal urethral sphincter muscle, thereby protecting it from damage by the expansion force of the stent without affecting the actual effect of the stent, thereby protecting its muscle function from damage.

[0027] 2. The utility model provides a recyclable prostate stent that prevents displacement. Through a continuous wave-like protrusion structure, multiple contact points and pressure points can be formed, which can effectively guide the ischemic necrosis of the proliferating prostate tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of the bracket of the utility model;

[0029] Figure 2 It is a front view of the utility model;

[0030] Figure 3 This is a schematic diagram of the support cap structure of the utility model;

[0031] Figure 4 This is a cross-sectional view of the guide tube of the utility model;

[0032] Figure 5 It is a cross-sectional view of the push tube of the utility model.

[0033] In the figure: 1. left support wire; 2. right support wire; 3. lower support wire; 4. fixing ring; 5. bracket cap; 6. inward concave shape; 7. continuous wavy protrusion; 8. guide tube; 9. push tube. DETAILED DESCRIPTION

[0034] The following will refer to the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In order to further understand the content of the utility model, the utility model is described in detail with reference to the accompanying drawings.

[0036] Reference Figure 1 , Figure 2 and Figure 3 The utility model discloses a recyclable prostate stent that prevents displacement, including a stent cap 5. The stent cap 5 is in the shape of a stepped cylinder. The stent cap 5 has two cavities inside. The front circular cavity is connected to the stent, and the rear non-circular cavity is connected to the push tube 9. The stent cap 5 can be rotated by rotating the push tube 9 to rotate the stent cap 5 and then the stent itself to adjust the angle of the stent when it is placed. A left support wire 1 is fixedly connected to the top of the left side of the stent cap 5, a right support wire 2 is fixedly connected to the bottom of the left front end of the stent cap 5, and a lower support wire 3 is fixedly connected to the rear end of the left bottom of the stent cap 5. The design of the head end support wire enables it to be easily elastically deformed during the compression and expansion of the stent. The deformable characteristics of the support wire increase the flexibility and adaptability of the stent. A fixing ring 4 is fixedly connected to the middle of the left side of the stent cap 5. The fixing ring 4 is used to be stuck in the prostatic urethra. Its tongue-like shape can fix the stent as a whole under the bladder neck to prevent the stent from shifting due to unexpected reasons during the indwelling process. The fixing ring 4 is an elastic fixing structure with a tongue-shaped structure. The connection points between the left supporting wire 1, the right supporting wire 2 and the lower supporting wire 3 are distributed in a triangular shape. The left supporting wire 1, the right supporting wire 2 and the lower supporting wire 3 are nickel-titanium memory alloy elastic wires. The left supporting wire 1, the right supporting wire 2 and the lower supporting wire 3 are twisted in pairs. The twisted structure combined with the triangular distribution can enhance the stability of the stent structure and improve safety. The left side of the top of the left supporting wire 1 and the right supporting wire 2 is provided with an inwardly concave shape 6. The inwardly concave shape 6 can bear the urethral sphincter muscle, so that it is not damaged by the expansion force of the stent, and does not affect the actual effect of the stent, protecting its muscle function from damage. The right side of the top of the left supporting wire 1 and the right supporting wire 2 is provided with a continuous wavy protrusion 7. The continuous wavy protrusion 7 can form multiple contact points and multiple pressure points, which can well guide the ischemic necrosis of the hyperplastic prostate tissue.

[0037] Reference Figure 4 A guide tube 8 is provided on the outside of the bracket cap 5. The outer diameter of the push tube 9 is slightly smaller than the inner diameter of the rear end opening of the bracket cap 5. The inner diameter of the guide tube 8 is smaller than the outer diameter of the entire bracket. When in use, the guide tube 8 can be inserted into the rear section of the bracket cap 5, supporting the bracket cap 5 to thereby transport the bracket forward. The push tube 9 has no fixed connection with the bracket cap 5 and can be pulled backwards to separate from the bracket cap 5 after the pushing is completed.

[0038] Reference Figure 5 A push tube 9 is arranged inside the guide tube 8, and the push tube 9 slides inside the guide tube 8 to push the stent. The push tube 9 is a non-circular cavity structure. The rear end of the push tube 9 is slotted and fixed with a recovery line. The recovery line has two main functions: one is to connect the stent cap 5 so that the stent can be pulled when the stent is recovered; the other is to fix the push tube 9 to prevent the push tube 9 from falling off. The push tube 9 is fixed by the knot at the tail end of the recovery line. The outer diameter of the knot is larger than the outer diameter of the push tube 9, which keeps the connection firm during the transportation process and helps to control and move the stent during the recovery process, so that it is not easy to loosen or fall off.

[0039] Working principle: First, check the size of the patient's prostate through ultrasound or other examination equipment, put the rigid cystoscope in the endoscope sheath and push the two together into the patient's urethra until the entrance of the bladder, keep the endoscope sheath still, and pull the cystoscope out of the endoscope sheath. Insert the guide tube 8 with the stent installed into the cystoscope sheath, and push the push tube 9 to push the stent into the endoscope sheath and slowly push it into the patient's bladder. The stent will automatically unfold in the patient's bladder. At this time, keep the stent still, pull out the endoscope sheath, and push the cystoscope again to the entrance of the bladder to observe the angle of the stent. Rotate the push tube 9 to align the stent fixing ring 4 with the patient's prostate middle lobe, and then slowly pull the push tube 9 outward to return the stent to the prostate. At this time, the three points of the stent are located at five o'clock, seven o'clock, and twelve o'clock respectively. When the stent fixing ring 4 just hits the outer wall of the bladder orifice, the stent reaches the designated position for insertion. At this time, cut the knot at the tail end of the push tube 9, pull the push tube 9 out of the urethra, and fix the recovery line to the penis with medical tape.

[0040] The stent can be removed five to seven days after implantation. During retrieval, the retrieval line fixed on the penis is inserted into a catheter of suitable diameter. The catheter is extended along the retrieval line from the external urethral opening of the penis into the body to the stent. The retrieval line is pulled hard to pull the stent into the catheter, and the stent can be removed.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A recyclable prostate stent for preventing displacement, comprising a stent cap (5), characterized in that: The left top of the bracket cap (5) is fixedly connected to a left supporting wire (1), the left front bottom of the bracket cap (5) is fixedly connected to a right supporting wire (2), the left bottom rear end of the bracket cap (5) is fixedly connected to a lower supporting wire (3), the left middle of the bracket cap (5) is fixedly connected to a fixing ring (4), the bracket cap (5) is provided with a guide tube (8) outside, a push tube (9) inside the guide tube (8), and the push tube (9) slides inside the guide tube (8) to push the bracket, the left side of the top of the left supporting wire (1) and the right supporting wire (2) is provided with an inwardly concave shape (6), and the right side of the top of the left supporting wire (1) and the right supporting wire (2) is provided with a continuous wavy protrusion (7).

2. The anti-displacement recyclable prostate stent according to claim 1, characterized in that: The connection points between the left supporting wire (1), the right supporting wire (2) and the lower supporting wire (3) are distributed in a triangular shape, and the left supporting wire (1), the right supporting wire (2) and the lower supporting wire (3) are nickel-titanium memory alloy elastic wires.

3. The anti-displacement recyclable prostate stent according to claim 1, characterized in that: The left supporting wire (1), the right supporting wire (2) and the lower supporting wire (3) are twined in pairs in a twisted structure.

4. The anti-displacement recyclable prostate stent according to claim 1, characterized in that: The front circular cavity of the support cap (5) is connected to the support, and the rear non-circular cavity of the support cap (5) is connected to the push tube (9).

5. The anti-displacement recyclable prostate stent according to claim 1, characterized in that: The rear end of the push tube (9) is grooved and a recovery line is fixed thereon.

6. The anti-displacement recyclable prostate stent according to claim 1, characterized in that: The support cap (5) is in the shape of a stepped cylinder as a whole, and has two cavities inside.

7. The anti-displacement recyclable prostate stent according to claim 1, characterized in that: The push tube (9) is a non-circular cavity structure.

8. The anti-displacement recyclable prostate stent according to claim 1, characterized in that: The outer diameter of the push tube (9) is slightly smaller than the inner diameter of the rear end opening of the stent cap (5), and the inner diameter of the guide tube (8) is smaller than the outer diameter of the entire stent.

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