Recyclable high-safety prostate stent

Abstract

The utility model relates to the technical field of prostate stents, and discloses a recoverable high-safety 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 guide pipe is arranged outside the support cap, a pushing pipe is arranged on the guide pipe, one end of the pushing pipe is connected with the support and pushes the support, so that the pushing pipe is pushed in the guide pipe in a sliding mode, and a fixing ring is fixedly connected to the left side of the support cap. According to the utility model, the head end of the support is shrunk, the shrunk head end of the support can apply a relatively small force near the bladder neck, and the force which needs to be applied to the prostatic hyperplasia tissue by the rear part of the support is kept unchanged, so that the shrunk structure of the head can better protect the sphincter in the urethra of a patient under the condition that the actual effect of the support is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of prostate stents, in particular to a recyclable high-safety prostate stent. 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] 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.

[0004] 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.

[0005] Although the above patent can adjust and change its diameter 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 local ischemic necrosis rate of prostate hyperplasia tissue is slow, the treatment effectiveness is poor, and the stent is easy to damage the urethral sphincter, which can cause urinary incontinence.

[0006] In view of the above problems, a recyclable high-safety prostate stent is proposed. Utility Model Content

[0007] The utility model aims to provide a recyclable high-safety prostate stent, which solves the problem in the background art that the stent is prone to damage the urethral sphincter and cause urinary incontinence.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a recyclable high-safety prostate stent, 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 guide tube is arranged on the outside of the stent cap, a push tube is arranged on the guide tube, one end of the push tube is connected to the stent and pushes the stent so that the push tube slides and advances inside the guide tube, a fixing ring is fixedly connected to the left side of the stent cap, and the fixing ring is approximately tongue-shaped, a stent head end is arranged on the left side of the left supporting wire and the right supporting wire, and a chamfer is arranged on the top left side of the left supporting wire and the right supporting wire.

[0009] By adopting the above technical solution, the head of the stent body is reduced in size. This structure can well support the internal urethral sphincter muscle tissue. The reduced head of the stent is more in line with the physiological structure of the sphincter, making the stent less irritating to the bladder neck. It can better protect the patient's internal urethral sphincter without affecting the actual effect of the stent.

[0010] 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.

[0011] 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.

[0012] As a further description of the above technical solution: the left supporting wire, the right supporting wire and the lower supporting wire are mutually intertwined in pairs in a twisted structure.

[0013] By adopting the above technical solution, the structural stability can be enhanced through the twisted structure.

[0014] 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.

[0015] By adopting the above technical solution, it is convenient to control and adjust the angle of the stent during placement.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] As a further description of the above technical solution: the push tube is a non-circular cavity structure.

[0021] 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.

[0022] 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.

[0023] 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, the push tube is not fixedly connected to the stent cap, and can be detached from the stent cap by pulling backwards after pushing is completed.

[0024] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0025] 1. The utility model provides a recyclable high-safety prostate stent. First, by reducing the head end of the stent, the reduced head end of the stent can exert a relatively small force near the bladder neck, while the force exerted on the prostate hyperplasia tissue by the rear part of the stent needs to remain unchanged. Therefore, the reduced head structure can better protect the patient's internal urethral sphincter without affecting the actual effect of the stent.

[0026] 2. The utility model provides a recyclable high-safety prostate stent with the advantages of simple implantation process, low tolerance requirements for patients, relatively simple complications, convenient withdrawal and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the bracket of the utility model;

[0028] Figure 2 This is a cross-sectional view of the guide tube of the utility model;

[0029] Figure 3 This is a cross-sectional view of the push tube of the utility model;

[0030] Figure 4 This is a schematic diagram of the support cap structure of the utility model;

[0031] Figure 5 It is a front view of the bracket of the present utility model.

[0032] In the figure: 1. left support wire; 2. right support wire; 3. lower support wire; 4. bracket cap; 5. fixing ring; 6. bracket head end; 7. push tube; 8. guide tube; 9. chamfer. DETAILED DESCRIPTION

[0033] 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.

[0034] In order to further understand the content of the utility model, the utility model is described in detail with reference to the accompanying drawings.

[0035] Reference Figure 1 , Figure 4 and Figure 5 The utility model is a recyclable prostate stent that prevents movement, including a stent cap 4. The stent cap 4 is in the shape of a stepped cylinder as a whole. The stent cap 4 has two cavities inside. The front circular cavity is connected to the stent, and the rear is a non-circular cavity connected to the push tube 7. The stent cap 4 can be rotated by rotating the push tube 7 to rotate the stent cap 4 and then the stent itself to adjust the angle of the stent when it is inserted. A left support wire 1 is fixedly connected to the top of the left side of the stent cap 4, and a right support wire 2 is fixedly connected to the bottom of the left front end of the stent cap 4. The front circular cavity of the stent cap 4 is connected to the stent, and the rear of the stent cap 4 is a non-circular cavity connected to the push tube 7. A lower support wire 3 is fixedly connected to the rear end of the left bottom of the stent cap 4. The design of the head end support wire allows 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. 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 elastic wires of nickel-titanium memory alloy. The left supporting wire 1, the right supporting wire 2 and the lower supporting wire 3 are twisted structures that are intertwined with each other in pairs. The twisted structure combined with the triangular distribution can enhance the stability of the stent structure and improve safety. A fixing ring 5 is fixedly connected to the left side of the stent cap 4, and the fixing ring 5 is approximately tongue-shaped, and the fixing ring 5 extends all the way to the outside of the lower supporting wire 3. A stent head end 6 is arranged on the left side of the left supporting wire 1 and the right supporting wire 2, and a chamfer 9 is arranged on the top of the left side of the left supporting wire 1 and the right supporting wire 2. The stent head end 6 is reduced and forms a chamfer 9 with three parallel nickel-titanium wires. Therefore, the stent head end 6 can exert a relatively small force near the bladder neck, thereby better protecting the patient's internal urethral sphincter.

[0036] Reference Figure 2A guide tube 8 is provided on the outside of the bracket cap 4. The outer diameter of the push tube 7 is slightly smaller than the inner diameter of the rear end opening of the bracket cap 4. The inner diameter of the guide tube 8 is smaller than the outer diameter of the entire bracket. When in use, the push tube 7 can be inserted into the rear section of the bracket cap 4, supporting the bracket cap 4 to transport the bracket forward. The push tube 7 has no fixed connection with the bracket cap 4 and can be pulled backward to separate from the bracket cap 4 after the pushing is completed.

[0037] Reference Figure 3 The guide tube 8 is provided with a push tube 7, one end of which is connected to the stent and pushes the stent so that the push tube 7 slides and pushes inside the guide tube 8. The push tube 7 is a non-circular cavity structure, and the rear end of the push tube 7 is slotted and fixed with a recovery line. The recovery line has two main functions: one is to connect the stent cap 4 so that the stent can be pulled when the stent is recovered; the other is to fix the push tube 7 to prevent the push tube 7 from falling off. The push tube 7 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 7, 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.

[0038] 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 7 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 7 to align the stent fixing ring with the patient's prostate middle lobe, and then slowly pull the push tube 7 outward to make the stent return 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 just hits the outer wall of the bladder opening, the stent reaches the designated position for insertion. At this time, cut the knot at the tail end of the push tube 7, pull the push tube 7 out of the urethra, and fix the recovery line to the penis with medical tape.

[0039] 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.

[0040] 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.

[0041] 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 high-safety prostate stent, comprising a stent cap (4), characterized in that: The left top of the bracket cap (4) is fixedly connected to a left supporting wire (1), the left front bottom of the bracket cap (4) is fixedly connected to a right supporting wire (2), the left bottom rear end of the bracket cap (4) is fixedly connected to a lower supporting wire (3), the bracket cap (4) is provided with a guide tube (8) outside, the guide tube (8) is provided with a push tube (7), one end of the push tube (7) is connected to the bracket and pushes the bracket so that the push tube (7) slides and pushes inside the guide tube (8), the bracket cap (4) is fixedly connected to a fixing ring (5) on the left side, and the fixing ring (5) is approximately tongue-shaped, the left sides of the left supporting wire (1) and the right supporting wire (2) are provided with a bracket head end (6), and the left tops of the left supporting wire (1) and the right supporting wire (2) are provided with a chamfer (9).

2. The recyclable high-safety 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 recyclable high-safety 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 mutually intertwined in pairs to form a twisted structure.

4. The recyclable high-safety prostate stent according to claim 1, characterized in that: The front circular cavity of the support cap (4) is connected to the support, and the rear non-circular cavity of the support cap (4) is connected to the push tube (7).

5. The recyclable high-safety prostate stent according to claim 1, characterized in that: The rear end of the push tube (7) is grooved and a recovery line is fixed thereon.

6. The recyclable high-safety prostate stent according to claim 1, characterized in that: The support cap (4) is in the shape of a stepped cylinder as a whole, and has two cavities inside.

7. The recyclable high-safety prostate stent according to claim 1, characterized in that: The pushing tube (7) is a non-circular cavity structure.

8. The recyclable high-safety prostate stent according to claim 1, characterized in that: The outer diameter of the push tube (7) is slightly smaller than the inner diameter of the rear end opening of the bracket cap (4), and the inner diameter of the guide tube (8) is smaller than the outer diameter of the entire bracket.

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