阅读说明：本技术 一种***支架系统 (Prostate stent system ) 是由 陆安俊 徐梦婷 唐世豪 于 2020-09-03 设计创作，主要内容包括：本发明涉及的是泌尿系统医疗器械领域,具体是一种前列腺支架系统。该系统由支架与输送系统两个部分组成,支架由支架主体、支架底座、连接绳组成,输送系统则由推送鞘、输送鞘组成。支架主体由固定压杆、连接杆和支撑柱组成形成镂空状立体结构。本发明支架由多根镍钛丝相互缠绕而成,相比起传统切割支架成本低且可以提供更高的支撑力,能够更好更快的压迫患者增生组织使其快速局部缺血重塑患者泌尿通路,从而缩短了支架的植入时间。支架还设有固定压杆结构,防止支架滑入膀胱与移位。支架的置入与回收都为简单无创手术且无极端温度变化,大大降低了医生与患者的负担,提高了手术的成功率。(The invention relates to the field of medical instruments for urinary systems, in particular to a prostate stent system. The system consists of a support and a conveying system, wherein the support consists of a support main body, a support base and a connecting rope, and the conveying system consists of a pushing sheath and a conveying sheath. The support main body is composed of a fixing pressure rod, a connecting rod and a supporting column to form a hollow three-dimensional structure. Compared with the traditional cutting bracket, the bracket provided by the invention has the advantages that the cost is low, higher supporting force can be provided, and hyperplastic tissues of a patient can be better and faster pressed to quickly realize ischemia and remodeling of urinary passages of the patient, so that the implantation time of the bracket is shortened. The bracket is also provided with a fixed pressure lever structure to prevent the bracket from sliding into the bladder and shifting. The support is placed and recovered in a simple non-invasive operation without end temperature change, so that the burden of doctors and patients is greatly reduced, and the success rate of the operation is improved.)

1. A prostate stent system comprises a stent and a conveying system, wherein the stent comprises a stent main body, a stent base and a connecting rope, the conveying system comprises a pushing sheath and a conveying sheath, and the prostate stent system is characterized in that the stent main body comprises a fixing pressure rod, a connecting rod and a supporting column to form a hollow three-dimensional structure; the bracket base is of a cylindrical structure and consists of a front section, a rear section and a middle clapboard, and a small hole structure is arranged in the center of the clapboard; the tail end of the connecting rope is provided with a knot with the outer diameter larger than the inner diameter of the pushing sheath.

2. The prostatic stent system of claim 1, wherein the stent body comprises a plurality of support posts, the support posts being equally spaced circumferentially.

3. The prostatic stent system according to claim 2, wherein the supporting pillars are formed by winding a plurality of nitinol wires around each other, and a connecting rod is arranged between the head ends of two adjacent supporting pillars and has a circular arc structure in the middle.

4. The prostatic stent system of claim 1, wherein the fixation strut is flexible and has an arcuate configuration.

5. The prostatic stent system according to claim 1, wherein the opening diameter of the front section of the stent base is larger than the opening diameter of the rear section of the stent base, and the inner diameter of the opening of the rear section of the stent base is slightly larger than the outer diameter of the push sheath.

6. The prostatic stent system according to claim 1, wherein the push sheath is a cylindrical structure, the outer diameter of the push sheath is slightly smaller than the inner diameter of the opening of the rear section of the stent base, and the inner diameter of the push sheath is slightly larger than the outer diameter of the connecting rope.

7. The prostatic stent system of claim 1, wherein the push sheath is longer than the delivery sheath, and wherein the push sheath extends from the rear end of the delivery sheath when the stent is disposed within the delivery sheath.

Technical Field

The invention relates to the field of medical instruments for urinary systems, in particular to a prostate stent system.

Background

Benign Prostatic Hyperplasia (BPH), commonly known as prostatic hypertrophy, is one of the common diseases in middle-aged and elderly men. About half of men older than 60 have symptoms of benign prostatic hyperplasia to varying degrees, and in the population of older men 70, 80 years, this figure is up to 90%. Patients with BPH may press the urethra due to hyperplasia and hypertrophy of the prostate, causing difficulty in urination, frequent and unsmooth urination, interruption of urine, or poor urine flow. Urinary stones, bladder tightening, urinary tract infections, and even kidney damage may also occur with increased disease.

For treating benign prostatic hyperplasia, a drug therapy or a surgical therapy is usually adopted, the drug therapy is usually not obvious in curative effect, and the surgical therapy is very easy to cause complications and can cause the loss of sexual function of patients in severe cases. To solve these problems, prostatic stents have been developed. The prostate stent is made of memory alloy materials, is assembled in vitro and is conveyed to the affected part of a patient to be expanded and restored to the shape by injecting normal saline, so that the affected tissue of the patient is propped open to achieve the treatment effect. However, the traditional prostate stent is mostly a nickel-titanium tube laser cutting stent, the cutting stent has higher cost and weaker supporting force, the stent is placed for a long time and is easy to shift, and the stent is difficult to take out.

Disclosure of Invention

To solve the problem, the invention provides a novel prostate stent system which consists of a stent and a conveying system. The bracket part consists of a bracket main body, a bracket base and a connecting rope.

The support main body is composed of a fixing pressure rod, a connecting rod and a supporting column to form a hollow three-dimensional structure. The support main part contains several support columns, and the support columns equidistance circumference distributes. The number of support columns may be different and the shape of the cross-section of the stent may also be different. The support columns are formed by winding a plurality of nickel-titanium memory alloy wires, a connecting rod is arranged between the head ends of two adjacent support columns, and an arc structure is arranged in the middle of the connecting rod.

The fixing pressure rod is of an arc-shaped structure, has elasticity, can play a role of fixing the support and prevents displacement.

The bracket base is of a cylindrical structure and consists of a front section, a rear section and a middle clapboard. The front section opening diameter is larger than the rear section opening diameter, and the tail end of the support is partially coated by the front section of the support base, so that the shape of the fixed support is realized. The inner diameter of the opening at the rear section of the bracket base is slightly larger than the outer diameter of the pushing sheath, and the pushing sheath can be inserted into the opening at the rear section of the bracket base. The middle of the clapboard in the middle of the bracket base is provided with a small hole structure, and the connecting rope passes through the small hole and is fixed with the bracket base by binding and glue.

The tail end of the connecting rope is provided with a knot, and the outer diameter of the knot is larger than that of the pushing sheath. Connect the rope linking bridge base, can play the effect of dragging the support when retrieving the support. The knot at the tail end of the connecting rope is used for fixing the pushing sheath, so that the pushing sheath can be prevented from falling off.

The conveying system part consists of a pushing sheath and a conveying sheath.

The pushing sheath is of a cylindrical structure, the outer diameter of the pushing sheath is slightly smaller than the inner diameter of an opening of the rear section of the bracket base, the inner diameter of the pushing sheath is slightly larger than the outer diameter of the connecting rope, and the pushing sheath can be inserted into the rear section of the bracket base and abuts against the partition plate in the middle of the bracket base to push the bracket to move forwards. The propelling movement sheath does not have fixed connection with the support base, and the propelling movement is accomplished the back pulling and can be broken away from with the support base.

The length of the pushing sheath is larger than that of the conveying sheath, and when the stent is arranged in the conveying sheath, the pushing sheath can extend out of the rear end of the conveying sheath.

The inner diameter of the delivery sheath is smaller than the outer diameter of the stent, and the stent is in a compressed state when being placed in the stent.

The connecting rope can be made of one or more materials such as silk thread, nylon, cotton thread or high molecular compound.

The pushing sheath is made of one or more high polymer materials such as hard high polymer materials PE, EVA, TPE and PVC.

The conveying sheath can be made of one or more of PE, EVA, TPE, PVC and other high polymer materials.

The invention has the following effective benefits: compared with the traditional cutting bracket, the bracket of the invention has low cost and can provide higher supporting force, and can better and more quickly press hyperplastic tissues of a patient to quickly realize ischemia and remodeling of urinary passages of the patient, thereby shortening the implantation time of the bracket, and the bracket can be recycled after an implantation period of 5-7 days. The traditional prostate stent usually has an implantation period of several months or even can not be recycled, the short implantation period of the stent can greatly relieve postoperative pain of a patient, and risks of stent displacement, stent intimation, stent calculus, inflammation caused by stent implantation and the like caused by long-term implantation are reduced. The support is also provided with a fixed pressure rod structure which can effectively support the outer wall of the bladder opening of a patient after the support is implanted, so that the support is prevented from sliding into the bladder and shifting. More importantly, the placement and the recovery of the bracket are simple non-invasive operations without end temperature changes, thereby greatly reducing the burden of doctors and patients and improving the success rate of the operations.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a structural sectional view of the present invention.

Fig. 3 is a schematic structural diagram of a in fig. 2.

FIG. 4 is a right side view of the bracket body and bracket base of FIG. 1 after assembly.

Fig. 5 is a left side view of the bracket main body and the bracket base in fig. 1 after being assembled.

Figure 6 is a cross-sectional view of the stent assembled with the push sheath and the delivery sheath.

Fig. 7 is a schematic view of a stent placed in a diseased site of a patient.

Detailed Description

The invention is further illustrated in the following description with reference to the drawings in which:

as shown in figure 1, the invention consists of a bracket and a conveying system, wherein the bracket consists of a bracket main body 1, a bracket base 2 and a connecting rope 4, and the bracket main body 1 consists of a fixed compression bar 11, a connecting rod 12 and a supporting column 13 to form a hollow three-dimensional structure. The support main part contains a plurality of support columns 13, and support columns 13 are equidistantly and circumferentially distributed. The supporting columns 13 are formed by winding a plurality of nickel-titanium memory alloy wires, a connecting rod 12 is arranged between the head ends of two adjacent supporting columns, and a bending arc 121 structure is arranged in the middle of the connecting rod. The tail end of the connecting rope 4 is provided with a knot.

As shown in fig. 3, the holder base 2 is a cylindrical structure, and is composed of a front section 21, a rear section 22, small holes 23, and a partition plate 24.

As shown in FIG. 2, the opening diameter of the front section 21 of the bracket base 2 is larger than that of the rear section 22, and the front section 21 of the bracket base partially covers the tail end of the bracket main body 1 to fix the shape of the bracket. The diameter of the opening of the rear section 22 of the bracket base is slightly larger than the outer diameter of the pushing sheath 3, and the pushing sheath 3 can be inserted into the opening of the rear section 22 of the bracket base 2. A partition plate 24 is arranged in the middle of the bracket base 2, a small hole 23 is arranged in the center of the partition plate 24, and the connecting rope 4 penetrates through the small hole 23 and is fixed with the bracket base 2 through binding and glue.

As shown in fig. 2, the tail end of the connecting rope 4 is provided with a knot 41, and the outer diameter of the knot 41 is larger than that of the pushing sheath 3. Connect 4 other ends of rope and connect support base 2, can play the effect of dragging the support when retrieving the support. The knot 41 at the tail end of the connecting rope 4 can be used for fixing the pushing sheath 3 and preventing the pushing sheath 3 from falling off.

As shown in fig. 5, the pushing sheath 3 is a cylindrical structure, the outer diameter of the pushing sheath 3 is slightly smaller than the inner diameter of the opening of the rear section 22 of the stent base 2, the inner diameter of the pushing sheath 3 is slightly larger than the outer diameter of the connecting rope 4, the pushing sheath 3 can be inserted into the opening of the rear section 22 of the stent base 2, and the pushing sheath can push the partition plate 24 in the middle of the stent base 2 to move forward. The pushing sheath 3 is not fixedly connected with the support base 2, and can be separated from the support base 2 after being pushed and pulled backwards.

As shown in FIG. 6, the length of the push sheath 3 is greater than that of the delivery sheath 5, and when the stent is placed inside the delivery sheath 5, the push sheath 3 protrudes from the rear end of the delivery sheath 5.

The method for implanting and recovering the prostate stent comprises the following steps:

as shown in fig. 7, the size of the prostate C of the patient is measured using an examination apparatus such as ultrasound, and the stent size is selected according to the size thereof. And inserting the delivery sheath 5 (shown in fig. 6) with the assembled stent from the urethral orifice of the patient, observing the delivery position of the delivery sheath 5 by matching with detection equipment such as ultrasound and the like, fixing the delivery sheath 5 when the delivery sheath 5 passes through the prostate and reaches the bladder orifice of the patient, slightly pushing the push sheath 3 forwards to ensure that the whole stent enters the bladder D of the patient, and withdrawing the delivery sheath 5 backwards. After the delivery sheath 5 is removed, the stent can be automatically expanded to the original expanded state, and if the stent is not sufficiently expanded, the stent can be expanded by injecting a proper amount of physiological saline with the temperature of 40 ℃ into the delivery sheath 5. The delivery sheath 5 is then withdrawn from the patient's urethra and, in conjunction with ultrasound or other detection devices, the push sheath 3 is pulled back as shown in fig. 7 to return the stent from the bladder to the patient's prostate, and the stent is completely installed while the stent holder 11 is held against the outer wall of the patient's bladder opening and the stent base 2 is still inside the bladder and has not reached the sphincter B. At this time, the knot 41 at the tail end of the stent connecting rope 4 is cut off, and the pushing sheath 3 is slightly retracted backwards, so that the pushing sheath 3 can be separated from the stent base 2 and taken out from the urethra of the patient.

The stent arranged at the prostate of the patient can forcibly open the hyperplastic tissue of the prostate of the patient, so that the hyperplastic tissue generates ischemia, and the hyperplastic condition of the prostate can be relieved after 5-7 days of implantation treatment.

When in recovery, the connecting rope 4 penetrates through the conveying sheath 5, the conveying sheath 5 is conveyed to the mounting position of the stent along the urethra, a proper amount of ice water with the temperature lower than 10 ℃ is injected into the conveying sheath 5 to soften the stent, the connecting rope 4 is pulled backwards to return the stent into the conveying sheath 5, and finally the pushing sheath 5 is pulled out of the urethra of the patient to complete the recovery of the stent.

The above description is only a typical example of the present invention, and is not intended to limit the present invention, and all examples modified and extended based on the present invention are within the scope of the present invention.