Prostate stent

Abstract

The utility model relates to the technical field of medical instruments, and discloses a prostate stent which comprises a stent cap, a left supporting wire, a right supporting wire, a lower supporting wire and a fixing ring are arranged on the left side of the stent cap, a herringbone structure is arranged at the joint of the left supporting wire and the right supporting wire, and an elastic rope is connected to the right side of the herringbone structure. The tail end of the right side of the elastic rope is fixedly connected with the support cap, the tail ends of the left sides of the left supporting wire, the right supporting wire and the lower supporting wire are provided with the support head end, the guide pipe is arranged outside the support cap, the lower supporting wire and the right supporting wire are wound mutually, and the left supporting wire and the right supporting wire are wound mutually. According to the utility model, through the reinforcing ribs of the stent and by reducing the contact area, the prostate tissue is subjected to higher pressure intensity, so that the prostate hyperplasia tissue can be quickly subjected to ischemic necrosis and atrophy, the urethra can be expanded as soon as possible, and the treatment effect can be quickly achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a prostate stent. Background Art

[0002] Prostate stents are a non-surgical treatment option, and their design is inspired by solving the problem of urethral obstruction caused by prostate hyperplasia. The design of the stent is to improve the patient's quality of life by expanding and supporting the prostate urethra channel, alleviating urinary frequency, urgency and urine flow problems. Compared with traditional surgery, prostate stents have significant advantages, such as shorter operation time and relatively shorter postoperative recovery time, which can significantly reduce complications such as urinary incontinence, sexual dysfunction, bacterial infection, and bleeding.

[0003] After searching, the existing Chinese patent announcement 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 after being released, 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.

[0004] Although the above patent can reduce the difficulty of hospitals in stocking stocks and reduce the cost of use for 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, the local ischemic necrosis rate of prostate hyperplasia tissue is slow, the treatment effectiveness is poor, and the existing technology stent is easy to damage the urethral sphincter, which can cause urinary incontinence.

[0005] In view of the above problems, a prostate stent is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a prostate stent, which solves the problems in the background technology that the prostate stent has weak supporting force, is easy to shift, has a slow rate of local ischemic necrosis of prostate hyperplasia tissue, has poor treatment effectiveness, and the prior art stent is easy to damage the urethral sphincter, which can cause urinary incontinence.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a prostate stent, comprising a stent cap, wherein a left supporting wire, a right supporting wire, a lower supporting wire and a fixing ring are arranged on the left side of the stent cap, a herringbone structure is arranged at the connection between the left supporting wire and the right supporting wire, an elastic rope is connected to the right side of the herringbone structure, the right end of the elastic rope is fixedly connected to the stent cap, a stent head end is arranged at the left end of the left supporting wire, the right supporting wire and the lower supporting wire, and chamfers are formed on both sides of the stent head end.

[0008] By adopting the above technical solution, the stent is formed into a three-dimensional frame structure by winding three nickel-titanium memory alloy elastic wires, namely the left support wire, the right support wire, and the lower support wire, and its cross-sectional shape is approximately triangular. The above stent can be divided into four parts: the stent head end, the parallel section, the tapered section, and the fixed ring. The stent head end contains three support wires, namely the left support wire, the right support wire, and the lower support wire. Their connection points are distributed in a triangular shape. The nickel-titanium memory alloy elastic wires of the parallel section and the tapered section are intertwined to form a twisted structure. The stent head end support wire is a rod extending from the parallel section. The design of the head end support wire allows it to easily undergo elastic deformation during the compression and expansion of the stent. The stent is wound with elastic closed wires to form a stable three-dimensional frame structure.

[0009] As a further description of the above technical solution: a guide tube is arranged outside the bracket cap, and a push tube is arranged inside the guide tube.

[0010] By adopting the above technical solution, the front end of the bracket cap is a non-circular cavity structure, a push tube is arranged in the guide tube, one end of the push tube is connected to the bracket and pushes the bracket, so that the push tube slides and advances inside the guide tube.

[0011] As a further description of the above technical solution: the lower supporting wire and the right supporting wire are intertwined with each other.

[0012] By adopting the above technical solution, the effect of enhancing support is achieved.

[0013] As a further description of the above technical solution: the left supporting wire and the right supporting wire are intertwined with each other.

[0014] By adopting the above technical solution, the bracket can be easily supported.

[0015] As a further description of the above technical solution: the left side of the fixing ring is connected to the bracket cap.

[0016] By adopting the above technical solution, the fixing ring is fixed to the stent cap together with the entire stent body by glue dripping, welding, etc. Its tongue-like shape can fix the entire stent to the prostatic urethra to prevent the stent from shifting due to unexpected reasons during the retention process.

[0017] As a further description of the above technical solution: the left supporting wire and the right supporting wire are externally fixedly connected with reinforcing ribs.

[0018] By adopting the above technical solution, an object parallel to the parallel section is added to the parallel section of the stent. This object is fixed integrally with the parallel section of the stent, which can strengthen the structure of the parallel section of the stent, ensuring that the stent can be deformed as little as possible, thereby ensuring the effect of stent implantation.

[0019] As a further description of the above technical solution: the fixing ring is arranged between the left supporting wire, the right supporting wire and the lower supporting wire.

[0020] By adopting the above technical solution, the fixing ring is an elastic fixing structure extending from the bracket cap portion and forming a tongue-shaped structure, which is used to be stuck in the prostatic urethra to prevent displacement.

[0021] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0022] 1. The utility model provides a prostate stent. First, the elastic rope can make the stent maintain sufficiently strong support after entering the human body and gradually tighten and rebound with the necrosis of the proliferative tissue, so that the stent maintains a relatively balanced force during use, so that it can achieve the treatment effect faster.

[0023] 2. The utility model provides a prostate stent, which reduces the contact area through the reinforcing ribs of the stent, so that the prostate tissue is subjected to greater pressure, so that the prostate hyperplasia tissue can quickly undergo ischemic necrosis and atrophy, and the urethra is expanded as soon as possible, so that the treatment effect can be achieved more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a side view of the utility model;

[0026] Figure 3 This is a schematic diagram of the guide tube structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the support cap structure of the utility model;

[0028] Figure 5 It is a schematic diagram of the push tube structure of the utility model.

[0029] In the figure: 1. Left support wire; 2. Right support wire; 3. Lower support wire; 4. Fixing ring; 5. Bracket cap; 6. Herringbone structure; 7. Elastic rope; 8. Reinforcement rib; 9. Guide tube; 10. Bracket head end; 11. Chamfer; 12. Push tube. DETAILED DESCRIPTION

[0030] 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.

[0031] In order to further understand the content of the utility model, the utility model is described in detail with reference to the accompanying drawings.

[0032] Reference Figure 1 , Figure 2 and Figure 3 The utility model is a prostate stent, comprising a stent cap 5, the stent cap 5 has two front and rear cavities, the front square cavity is connected to the stent body, the rear circular cavity is connected to the push tube 12, the left side of the stent cap 5 is provided with a left support wire 1, a right support wire 2, a lower support wire 3 and a fixing ring 4, the left support wire 1, the right support wire 2, and the lower support wire 3 form a stent, the left support wire 1 and the right support wire 2 are provided with a herringbone structure 6 at the connection, the right side of the herringbone structure 6 is connected with an elastic rope 7, the right end of the elastic rope 7 is fixedly connected to the stent cap 5, and plays a role in strengthening the supporting force, and is made of elastic material, and is fixed to the head and tail of the stent by bonding or mechanical means. The elastic rope should be made of an elastic material such as polyester, and can also be an elastic structure such as a spring ring. When assembled, the structure is in a stretched state to ensure that it can still keep the stent tightened when the stent is not subjected to external pressure. The left ends of the left support wire 1, the right support wire 2 and the lower support wire 3 are provided with a stent head end 10, and chamfers 11 are formed on both sides of the stent head end 10 to play a protective effect.

[0033] Reference Figure 3 and Figure 4 A guide tube 9 is arranged outside the stent cap 5, and the outer diameter of the guide tube is slightly smaller than the inner diameter of the rear end opening of the stent cap. The stent is placed in a compressed state inside it, and the lower supporting wire 3 and the right supporting wire 2 are intertwined with each other. The left supporting wire 1 is arranged above the right supporting wire 2, which is convenient for the stent to support. The left side of the fixing ring 4 is connected to the stent cap 5, and the left supporting wire 1 and the right supporting wire 2 are fixedly connected to the right reinforcing rib 8 on the outside, which can strengthen the parallel section structure of the stent and ensure the effect of stent implantation. The fixing ring 4 is arranged between the left supporting wire 1, the right supporting wire 2 and the lower supporting wire 3. The fixing ring 4 is an elastic fixing structure extending from the stent cap 5 to form a tongue-shaped structure, which is used to be stuck in the prostatic urethra to prevent displacement.

[0034] 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 with the stent into the cystoscope sheath, and push the push tube 12 to push the stent composed of the left support wire 1, the right support wire 2 and the lower support wire 3 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 to align the stent fixing ring 4 with the patient's prostate middle lobe, and then slowly pull the push tube 12 outward to make the stent return to the prostate. At this time, the three points of the stent are located at 5 o'clock, 7 o'clock, and 12 o'clock respectively. When the stent fixing ring 4 just presses against the outer wall of the bladder orifice, the stent reaches the designated position for insertion. At this time, the knot at the tail end of the push tube 12 is cut off, the push tube is pulled out from the urethra, and the recovery line is fixed to the penis with medical tape.

[0035] When the stent is first implanted into the proliferative prostate tissue, it is compressed by external tissues, and the radial dimension of the stent is reduced, generating radial expansion force to act on the external prostate tissue. Figure 2 As shown; at the same time, the axial length of the stent increases, the elastic rope is further stretched, and a rebound force is generated to tighten the stent, further increasing the force on the surrounding prostate tissue, as shown Figure 3 In addition, the elastic cord can also prevent the stent from becoming too thin and long due to the pressure of the surrounding tissue, thereby reducing the risk of the stent slipping into the bladder.

[0036] The stent can be removed 5-7 days after implantation. During retrieval, the retrieval line fixed on the penis is inserted into a catheter with a suitable diameter. The catheter is inserted along the retrieval line from the external opening of the penis urethra 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.

[0037] 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.

[0038] 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 prostate stent, comprising a stent cap (5), characterized in that: The left side of the bracket cap (5) is provided with a left supporting wire (1), a right supporting wire (2), a lower supporting wire (3) and a fixing ring (4); a herringbone structure (6) is provided at the connection between the left supporting wire (1) and the right supporting wire (2); an elastic rope (7) is connected to the right side of the herringbone structure (6); the right end of the elastic rope (7) is fixedly connected to the bracket cap (5); the left ends of the left supporting wire (1), the right supporting wire (2) and the lower supporting wire (3) are provided with a bracket head end (10); chamfers (11) are formed on both sides of the bracket head end (10).

2. A prostate stent according to claim 1, characterized in that: A guide tube (9) is arranged outside the support cap (5), and a push tube (12) is arranged inside the guide tube (9).

3. A prostate stent according to claim 1, characterized in that: The lower supporting wire (3) and the right supporting wire (2) are intertwined with each other.

4. A prostate stent according to claim 1, characterized in that: The left supporting wire (1) and the right supporting wire (2) are intertwined with each other.

5. A prostate stent according to claim 1, characterized in that: The right side of the fixing ring (4) is connected to the bracket cap (5).

6. A prostate stent according to claim 1, characterized in that: The left supporting wire (1) and the right supporting wire (2) are externally fixedly connected with reinforcing ribs (8).

7. A prostate stent according to claim 1, characterized in that: The fixing ring (4) is arranged between the left supporting wire (1), the right supporting wire (2) and the lower supporting wire (3).

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