Implanted stent for urethra prostate part

Abstract

The utility model discloses an implantation support used for a urethra prostate part, and aims to provide an implantation support used for the urethra prostate part, which is beneficial to urination when the support is retained in a body, and comprises a support body, a connecting pipe and three elastic stop compression bars, the support body is of a hollowed-out three-dimensional structure formed by shaping a plurality of elastic closed wires, the three elastic locking pressing rods are distributed in the circumferential direction of the connecting pipe and located at the corresponding hollowed-out positions of the support body respectively, and one end of the support body and the ends of the elastic locking pressing rods are fixed into one end of the connecting pipe at the same time after one end of the support body shrinks inwards. One end of the support body is provided with a connecting pipe, the other end of the support body expands outwards in an arc shape, two of the elastic locking pressing rods incline outwards gradually in a linear mode, the other elastic locking pressing rod expands outwards in an arc shape to form a blade shape, and a connecting rope is fixed to the other end of the connecting pipe. The utility model has the beneficial effect that the purpose of facilitating urination when the stent is retained in the body is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field related to implantation brackets for the prostate part of the urethra, in particular to an implantation bracket for the prostate part of the urethra. Background Art

[0002] Benign prostatic hyperplasia (BPH), commonly known as an enlarged prostate, is a common condition in middle-aged and elderly men. Approximately half of men over 60 experience varying degrees of BPH symptoms, and this figure rises to 90% in men in their 70s and 80s. BPH patients experience symptoms such as difficulty urinating, frequent and weak urination, interrupted urination, or a weak urine stream due to the enlarged prostate. As the condition worsens, urethral stones, bladder strain, urinary tract infections, and even kidney damage may develop.

[0003] Benign prostatic hyperplasia (BPH) is commonly treated with medication or surgery. However, medication is often ineffective, while surgery is prone to complications, which can lead to loss of sexual function in severe cases. To address these issues, prostate stents have been developed. Made of shape-memory alloy, these stents are assembled outside the body and then delivered to the patient's site. After saline is injected, the stent expands and restores its shape, thereby expanding the patient's tissue and achieving the therapeutic effect.

[0004] Chinese patent number CN111839851A, first published on October 30, 2020, discloses a prostate stent system consisting of a stent and a delivery system. The stent consists of a stent body, a stent base, and a connecting rope, while the delivery system consists of a push sheath and a delivery sheath. The system is characterized by a stent body composed of a fixed pressure rod, a connecting rod, and a support column, forming a hollow three-dimensional structure. The stent base is a cylindrical structure consisting of a front section, a rear section, and a central partition with a small hole in the middle. The connecting rope has a knot at the end, the outer diameter of which is larger than the inner diameter of the push sheath. The fixed pressure rod is a flexible arc-shaped structure.

[0005] It can be seen from the above patent that in the prior art, the prostate stent is usually only provided with a single arc-shaped fixed pressure rod, which is used to rest against the prostate opening for positioning and to prevent the stent from migrating back into the bladder; however, this structure is not conducive to the expansion of the prostate side wall during the period when the stent remains in the body, which may easily cause the problem of insufficient urination in some patients. Utility Model Content

[0006] The utility model aims to overcome the problem in the prior art that urination is not smooth due to insufficient expansion of the prostate side wall during the period when the stent is retained in the body, and provides an implanted stent for the prostate part of the urethra, which is conducive to urination during the period when the stent is retained in the body.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A stent implant for the prostate portion of the urethra comprises a stent body, a connecting tube and three elastic stop pressure rods. The stent body is a hollow three-dimensional structure formed by shaping a number of elastic closed wires. The three elastic stop pressure rods are distributed along the circumference of the connecting tube and are respectively located at corresponding hollow positions of the stent body. One end of the stent body contracts inwardly and is simultaneously fixed in one end of the connecting tube together with the end of the elastic stop pressure rod. The other end of the stent body opens outward in an arc shape, wherein two elastic stop pressure rods gradually tilt outward linearly, and the other elastic stop pressure rod opens outward in an arc shape to form a leaf shape. A connecting rope is fixed to the other end of the connecting tube.

[0009] The stent body is a hollow, three-dimensional structure formed from several elastic, closed wires. Three elastic stop rods are distributed circumferentially along the connecting tube and located at corresponding hollow locations within the stent body. One end of the stent body contracts inward and is simultaneously fixed within one end of the connecting tube along with the ends of the elastic stop rods. The other end of the stent body expands outward in an arc shape, with two of the elastic stop rods gradually tilting outward linearly, and the other elastic stop rod expanding outward in an arc shape to form a leaf shape. A connecting rope is fixed to the other end of the connecting tube. After the stent body expands, the leaf-shaped elastic stop rods abut against the prostate opening to prevent the stent from migrating back into the bladder. Simultaneously, the two elastic stop rods gradually tilting outward linearly prop up the prostate walls, further expanding the internal passage of the prostate and facilitating urination while the stent is retained in the body.

[0010] Preferably, the stent body comprises a proximal support rod, a middle support rod, and a distal support rod, each of the proximal support rods, the middle support rods, and the distal support rods, wherein the proximal support rods are fixed at one end of the connecting tube, the other end of the proximal support rod is fixedly connected to the end of the corresponding middle support rod and forms a whole, the middle support rods and the connecting tube are parallel to each other, the proximal support rods are inclined and the angle formed with the middle support rods is an obtuse angle, the other ends of each two adjacent middle support rods are fixedly connected to the corresponding distal support rod and form a whole, the distal support rods are V-shaped and arc-shaped and extend outward from the ends to the center. The structural design of the stent body can be compressed or expanded. The stent body in a compressed state is convenient for insertion into or removal from the human body. The stent body in a retracted state is convenient for applying radial pressure to the inner wall tissue of the prostate, thereby creating a longitudinal incision to relieve urethral constriction and increase urinary tract. Over time, the force applied by the stent body weakens the blood supply of the tissue contacting the wire, thereby inducing tissue necrosis and forming an infarcted incision.

[0011] Preferably, the middle of the distal support rod forms a V-shaped protrusion after a smooth transition through an arc structure, which is more conducive to the contraction of the stent body and has a smaller diameter after contraction, thereby reducing the pain of the patient when inserting or removing it from the human body.

[0012] Preferably, the three proximal support rods are respectively located at the 5 o'clock, 7 o'clock, and 12 o'clock positions. A first stop zone is formed between the proximal support rod corresponding to the 5 o'clock position and the proximal support rod corresponding to the 12 o'clock position. A second stop zone is formed between the proximal support rod corresponding to the 7 o'clock position and the proximal support rod corresponding to the 12 o'clock position. A third stop zone is formed between the proximal support rod corresponding to the 5 o'clock position and the proximal support rod corresponding to the 7 o'clock position. Two linear elastic stop pressure rods that gradually tilt outward are respectively located in stop zone 1 and stop zone 2 and are shorter than the other leaf-shaped elastic stop pressure rod. Another elastic stop pressure rod that expands outward in an arc shape to form a leaf shape is located in stop zone 3. The two elastic stop pressure rods located in stop zone 1 and stop zone 2 respectively prop up the two side walls of the prostate. At the same time, the elastic stop pressure rod located in stop zone 3 abuts against the prostate opening for positioning, thereby preventing the stent from migrating back into the bladder.

[0013] Preferably, the device further comprises a traction tube and a stent guide tube, wherein the end surface of the connecting tube is provided with a slot matching the traction tube, one end of the connecting rope is located within the traction tube, and the other end of the connecting rope is located outside the traction tube, the connecting tube is slidably connected to the interior of the stent guide tube, the stent body and the elastic stop pressure rod can both be retracted into the stent guide tube, one end of the traction tube is located within one end of the stent guide tube, the other end of the traction tube passes through the other end of the stent guide tube and is located outside the stent guide tube, and the traction tube is slidably connected to the stent guide tube. In an initial state, the stent body and the elastic stop pressure rod are both retracted into the stent guide tube, the traction tube is inserted into the sheath through the stent guide tube, and the stent body is pushed into the bladder, causing the stent body and the elastic stop pressure rod to spring open; the stent guide tube is withdrawn, a urethroscope is inserted to observe the position of the stent body in the human body, and then the traction tube is rotated to place the stent body in the desired position; the traction tube is slowly pulled outward to cause the stent body to retract to the prostate until the elastic stop pressure rod located in the stop zone three just abuts against the prostate opening.

[0014] Preferably, a fixing cap is fixed to one end of the connecting cord located outside the traction tube, and the fixing cap is fixedly connected to the end of the traction tube. Once the stent body is positioned properly, the operator cuts off the fixing cap, removes the traction tube, and then observes the stent body through a urethroscope to see if the position has changed. Finally, the operator removes the relevant components, leaving the stent body alone in the human body, with the connecting cord exposed and fixed to the human genitals, thus completing the implantation of the stent body.

[0015] The beneficial effects of the present invention are: further expanding the internal passage of the prostate, thereby achieving the purpose of facilitating urination while the stent remains in the body; the structural design of the stent body can be compressed or expanded, and the stent body in the compressed state is convenient for inserting into or removing from the human body, and the stent body in the popped-out state is convenient for applying radial pressure to the inner wall tissue of the prostate, thereby producing a longitudinal incision to relieve urethral constriction and increase the urinary tract; the V-shaped protrusion is more conducive to the contraction of the stent body and the diameter after contraction is smaller, so that it reduces the patient's pain when inserted into or removed from the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure when the bracket body is ejected;

[0018] Figure 3 is an end view of the stent body;

[0019] Figure 4 It is the main view of the utility model;

[0020] Figure 5 yes Figure 4 Cross-sectional view of AA;

[0021] Figure 6 yes Figure 5 A magnified view of the structure at point B.

[0022] In the figure: 1. Stent body, 2. Connecting tube, 3. Elastic stop pressure rod, 4. Connecting rope, 5. Proximal support rod, 6. Middle support rod, 7. Distal support rod, 8. V-shaped protrusion, 9. Stop zone 1, 10. Stop zone 2, 11. Stop zone 3, 12. Traction tube, 13. Stent guide tube, 14. Fixing cap, 15. Slot. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 and Figure 2In the described embodiment, an implantable stent for the prostate part of the urethra includes a stent body 1, a connecting tube 2 and three elastic stop pressure rods 3. The stent body 1 is a hollow three-dimensional structure formed by shaping several elastic closed wires. The three elastic stop pressure rods 3 are distributed along the circumference of the connecting tube 2 and are respectively located at corresponding hollow positions of the stent body 1. After one end of the stent body 1 contracts inward, it is fixed in one end of the connecting tube 2 at the same time as the end of the elastic stop pressure rod 3. The other end of the stent body 1 opens outward in an arc shape, wherein two of the elastic stop pressure rods 3 gradually tilt outward linearly, and the other elastic stop pressure rod 3 opens outward in an arc shape to form a leaf shape. A connecting rope 4 is fixed to the other end of the connecting tube 2.

[0025] like Figure 2 and Figure 3 As shown, the stent body 1 includes a proximal support rod 5, a middle support rod 6, and a distal support rod 7. The number of the proximal support rod 5, the middle support rod 6, and the distal support rod 7 is three. One end of the proximal support rod 5 is fixed in one end of the connecting tube 2, and the other end of the proximal support rod 5 is fixedly connected to one end of the corresponding middle support rod 6 to form a whole. The middle support rod 6 and the connecting tube 2 are parallel to each other. The proximal support rod 5 is inclined and the angle formed with the middle support rod 6 is an obtuse angle. The other ends of each adjacent two middle support rods 6 are fixedly connected to form a whole through the corresponding distal support rod 7. The distal support rod 7 is V-shaped and expands outward in an arc shape from its two ends to the middle. The middle of the distal support rod 7 smoothly transitions through the arc structure to form a V-shaped protrusion 8.

[0026] like Figure 3 As shown, the three proximal support rods 5 are respectively distributed at the five o'clock, seven o'clock and twelve o'clock positions, and a stop zone 1 9 is formed between the proximal support rod 5 corresponding to the five o'clock position and the proximal support rod 5 corresponding to the twelve o'clock position, a stop zone 2 10 is formed between the proximal support rod 5 corresponding to the seven o'clock position and the proximal support rod 5 corresponding to the twelve o'clock position, and a stop zone 3 11 is formed between the proximal support rod 5 corresponding to the five o'clock position and the proximal support rod 5 corresponding to the seven o'clock position, wherein two elastic stop pressure rods 3 that are linearly and gradually inclined outward are respectively located in the stop zone 1 9 and the stop zone 2 10 and their lengths are both smaller than the other leaf-shaped elastic stop pressure rod 3, and the other elastic stop pressure rod 3 that is arc-shaped and opens outward to form a leaf shape is located in the stop zone 3 11.

[0027] like Figure 1 、 Figure 4 、 Figure 5 and Figure 6As shown, it also includes a traction tube 12 and a stent guide tube 13. A slot 15 matching the traction tube 12 is provided on the end surface of the connecting tube 2. One end of the connecting rope 4 is located in the traction tube 12, and the other end of the connecting rope 4 is located outside the traction tube 12. The connecting tube 2 is slidably connected to the inside of the stent guide tube 13. The stent body 1 and the elastic stop pressure rod 3 can both be retracted into the stent guide tube 13. One end of the traction tube 12 matches the slot 15 and is located in one end of the stent guide tube 13. The other end of the traction tube 12 passes through the other end of the stent guide tube 13 and is located outside the stent guide tube 13. The traction tube 12 is slidably connected to the stent guide tube 13.

[0028] like Figure 1 and Figure 2 As shown, a fixing cap 14 is fixed to one end of the connecting rope 4 outside the traction tube 12 , and the fixing cap 14 is fixedly connected to the end of the traction tube 12 .

[0029] In the initial state, the stent body 1 and the elastic stop pressure rod 3 are both retracted in the stent guide tube 13, the traction tube 12 is inserted into the sheath through the stent guide tube 13, and the stent body 1 is pushed into the bladder so that the elastic stop pressure rod 3 of the stent body 1 are both ejected; the stent guide tube 13 is pulled out, and a urethroscope is inserted to observe the position of the stent body 1 in the human body, and then the traction tube 12 is rotated to make the stent body 1 in the ideal position; the traction tube 12 is slowly pulled outward to make the stent body 1 retreat to the prostate until the elastic stop pressure rod 3 located in the stop area three 11 just rests against the prostate opening, and at the same time, the two elastic stop pressure rods located in the stop area 1 9 and the stop area 2 10 respectively 3. Stretch out the two side walls of the prostate; when the position of the stent body 1 is adjusted into place, the operator cuts off the fixing cap 14, pulls out the traction tube 12, and then observes whether the position of the stent body 1 changes through a urethroscope; finally, other related components are removed, so that the stent body 1 remains alone in the human body, and the connecting rope 4 is exposed outside the human body and fixed to the human genitals, thus completing the implantation of the stent body 1; the stent body 1 in the popped-out state is convenient for applying radial pressure to the inner wall tissue of the prostate, thereby producing a longitudinal incision to relieve urethral constriction and increase the urinary tract; over time, the force exerted by the stent body 1 weakens the blood supply of the tissue in contact with the wire, thereby inducing tissue necrosis and generating an infarcted incision.

Claims

1. An implantable stent for the prostate urethra, characterized in that: The invention comprises a bracket body (1), a connecting tube (2) and three elastic stop pressure rods (3), wherein the bracket body (1) is a hollow three-dimensional structure formed by shaping a plurality of elastic closed wires, and the three elastic stop pressure rods (3) are distributed along the circumference of the connecting tube (2) and are respectively located at corresponding hollow positions of the bracket body (1), and one end of the bracket body (1) is retracted inwardly and fixed to one end of the connecting tube (2) at the same time as the end of the elastic stop pressure rod (3), and the other end of the bracket body (1) is opened outward in an arc shape, wherein two elastic stop pressure rods (3) are gradually inclined outward in a linear manner, and the other elastic stop pressure rod (3) is opened outward in an arc shape to form a leaf shape, and a connecting rope (4) is fixed to the other end of the connecting tube (2).

2. The implantable stent for the prostate urethra according to claim 1, characterized in that: The stent body (1) comprises a proximal support rod (5), a middle support rod (6) and a distal support rod (7), wherein the number of the proximal support rod (5), the middle support rod (6) and the distal support rod (7) are three, one end of the proximal support rod (5) is fixed in one end of the connecting tube (2), the other end of the proximal support rod (5) is fixedly connected to one end of the corresponding middle support rod (6) and forms a whole, the middle support rod (6) and the connecting tube (2) are parallel to each other, the proximal support rod (5) is inclined and the angle formed with the middle support rod (6) is an obtuse angle, the other ends of each adjacent two middle support rods (6) are fixedly connected to form a whole through the corresponding distal support rod (7), and the distal support rod (7) is V-shaped and opens outward in an arc shape from its two ends to the middle.

3. The implantable stent for the prostate urethra according to claim 2, characterized in that: The middle of the distal support rod (7) smoothly transitions through the arc structure to form a V-shaped protrusion (8).

4. The implantable stent for the prostate urethra according to claim 2, characterized in that: The three proximal support rods (5) are respectively distributed at the positions of five o'clock, seven o'clock and twelve o'clock. The proximal support rod (5) corresponding to the five o'clock position and the proximal support rod (5) corresponding to the twelve o'clock position form a stop zone one (9), the proximal support rod (5) corresponding to the seven o'clock position and the proximal support rod (5) corresponding to the twelve o'clock position form a stop zone two (10), and the proximal support rod (5) corresponding to the five o'clock position and the proximal support rod (5) corresponding to the seven o'clock position form a stop zone three (11). Two elastic stop pressure rods (3) that are linearly and gradually inclined outward are respectively located in the stop zone one (9) and the stop zone two (10) and their lengths are both shorter than the other leaf-shaped elastic stop pressure rod (3). The other elastic stop pressure rod (3) that is arc-shaped and opens outward to form a leaf shape is located in the stop zone three (11).

5. The implantable stent for the prostate urethra according to claim 1, 2, 3 or 4, characterized in that: It also includes a traction tube (12) and a stent guide tube (13), a slot (15) matching the traction tube (12) is provided on the end surface of the connecting tube (2), one end of the connecting rope (4) is located in the traction tube (12), and the other end of the connecting rope (4) is located outside the traction tube (12), the connecting tube (2) is slidably connected to the inside of the stent guide tube (13), the stent body (1) and the elastic stop pressure rod (3) can both be retracted in the stent guide tube (13), one end of the traction tube (12) matches the slot (15) and is located in one end of the stent guide tube (13), the other end of the traction tube (12) passes through the other end of the stent guide tube (13) and is located outside the stent guide tube (13), and the traction tube (12) is slidably connected to the stent guide tube (13).

6. The implantable stent for the prostate urethra according to claim 5, characterized in that: A fixing cap (14) is fixed to one end of the connecting rope (4) located outside the traction tube (12), and the fixing cap (14) is fixedly connected to the end of the traction tube (12).

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