CN215349773U

CN215349773U - Interventional device for relieving prostatic hyperplasia

Info

Publication number: CN215349773U
Application number: CN202121660019.0U
Authority: CN
Inventors: 刘西伟; 邵雷
Original assignee: Beijing Purun Medical Devices Co ltd
Current assignee: Beijing Purun Medical Devices Co ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2021-12-31
Anticipated expiration: 2031-07-21

Abstract

The utility model provides an interventional instrument for relieving prostatic hyperplasia, which comprises a mesh stent formed by wire materials, wherein the mesh stent is provided with a main stent and an auxiliary stent, and the main stent is provided with a circumferential supporting part circumferentially supported on the inner wall of a urethra of a bladder neck and a longitudinal supporting part longitudinally extending along the inner wall of the urethra. One end of the auxiliary bracket is supported against the inner wall of the prostatic urethra. The mesh-shaped stent can generate longitudinal supporting force in the inner wall tissue of the urethra after being placed into a human body through a minimally invasive surgery so as to relieve urethral contraction, and can be taken out after symptoms are relieved after a period of time, so that the mesh-shaped stent can be used for treating BPH (BPH) related symptoms, reduces pain of a patient, and does not bring sequela.

Description

Interventional device for relieving prostatic hyperplasia

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an interventional instrument for relieving prostatic hyperplasia.

Background

Benign Prostatic Hyperplasia (BPH) refers to an abnormal but non-malignant (noncancerous) growth of the prostate that is very commonly observed in elderly men. BPH is a chronic condition and is associated with the development of obstruction of urinary outflow in the prostatic urethra. It also causes a range of diseases, collectively known as Lower Urinary Tract Symptoms (LUTS), including sexual dysfunction, urinary frequency, difficulty urinating, urinary retention, urinary leakage, and urinary and bladder infections, which worsen with abnormal growth and progression in the prostate.

Most BPH patients are treated either medically or surgically to restore the ability of urine to pass through the urethra near the prostate. Alpha-blockers are the most common drugs prescribed for BPH. They counteract the dynamic component of urinary outflow obstruction by relaxing the smooth muscle in the bladder neck, prostate capsule and prostatic urethra. 5-alpha-reductase inhibitors (5-ARIs) are more effective in men with larger prostate glands. They function by reducing the size of the prostate. Although these drugs can alleviate BPH, they have inevitable side effects and do not provide a complete solution for many BPH patients. Side effects include orthostatic hypotension, dizziness, decreased libido, and sexual dysfunction. Other BPH patients do not experience significant relief of symptoms and many find daily medication both cumbersome and expensive.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention is directed to an interventional instrument for relieving prostatic hyperplasia, which is capable of relieving the contraction of the urethra by providing an implantable mesh stent capable of being introduced into the urethra through a minimally invasive surgery, allowing the stent to be inserted and expanded non-invasively and then to be left in the prostatic urethra for a certain period of time, and generating a longitudinal supporting force in the surrounding inner wall tissues of the urethra by the stent, and then taking out the device from the urethra after a certain period of time to treat the symptoms related to BPH, thereby reducing the pain of a patient without causing sequelae. The purpose of the utility model is realized by the following technical scheme:

the utility model provides an interventional instrument for relieving prostatic hyperplasia, which comprises a mesh stent formed by wire materials, wherein the mesh stent is provided with a main body stent, and the main body stent is provided with a circumferential supporting part circumferentially supported on the inner wall of a urethra of a bladder neck and a longitudinal supporting part longitudinally extending along the inner wall of the urethra.

Furthermore, the net-shaped support is also provided with an auxiliary support, and one end of the auxiliary support is supported on the inner wall of the prostatic urethra in an abutting mode.

Further, the main body support and the auxiliary support are fixed together through a hub.

Furthermore, the reticular stent is woven by metal wires with the diameter of 0.5 mm-1 mm.

Furthermore, the main body bracket is woven by three main body metal wires, wherein each main body metal wire forms an annular coil in a mode of bringing two ends of the main body metal wire into the concentrator, and the longitudinal extension sections of each main body metal wire close to the two ends of the main body metal wire are mutually wound with the longitudinal extension sections of the other two main body metal wires respectively in the process of forming the annular coil; the sections of the two main body metal wires which are mutually wound form a longitudinal supporting part of the main body support, and the sections of the three metal wires which independently extend surround to form a circumferential supporting part of the main body support.

Further, the auxiliary stand adopts auxiliary metal wire to weave and forms, auxiliary metal wire length is less than main part wire length, auxiliary metal wire brings the mode of concentrator into with both ends and forms arc loop, the auxiliary stand supports through the arc terminal surface of its first end and supports on prostate urethra inner wall.

Further, a guide mechanism is included that includes a retrieval catheter extending from the hub to outside the prostatic urethra.

Further, the metal wire includes a nickel alloy wire or a copper alloy wire.

Further, the mesh-shaped support is prepared from shape memory alloy.

The utility model has the beneficial effects that:

(1) the mesh-shaped stent can generate longitudinal supporting force in the inner wall tissue of the urethra after being placed into a human body through a minimally invasive surgery so as to relieve urethral contraction, and can be taken out after symptoms are relieved after a period of time, so that the mesh-shaped stent can be used for treating BPH (BPH) related symptoms, reduces pain of a patient, and does not bring sequela;

(2) the mesh-shaped bracket of the utility model can effectively prevent the mesh-shaped bracket from migrating into the bladder of a patient during the implantation process by arranging the auxiliary bracket with a special structure which is propped against the inner wall of the prostatic urethra outside the main bracket, thereby ensuring the safety and reliability of the use process;

(3) the mesh-shaped stent prepared by adopting the wire materials reduces the volume of the stent placed in the body to the maximum extent, and can reduce the influence of the stent on the urethral passage to the maximum extent so as to ensure the placement safety and the treatment effect.

Drawings

FIG. 1 is a schematic view of an interventional instrument for alleviating prostatic hyperplasia according to the present invention;

FIG. 2 is another angular schematic view of the interventional instrument of FIG. 1;

fig. 3 is a schematic view of the interventional instrument of fig. 1 in use.

In the figure:

200-mesh scaffold; 210 b-a longitudinal support; 300-a hub;

210-a body support; 220-an auxiliary bracket; 400-recovery catheter.

210 a-a circumferential support;

Detailed Description

The technical solutions of the preferred embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments.

The embodiment provides an interventional instrument for relieving prostatic hyperplasia, which comprises a mesh stent 200 formed by wire materials, a hub 300 and a guide mechanism, wherein the mesh stent 200 is compressed and then sent to a target position through the guide mechanism to be expanded, the expanded mesh stent 200 comprises a main stent 210 and an auxiliary stent 220, the main stent 210 comprises a circumferential supporting part 210a circumferentially supported on the inner wall of the urethra of the neck of the bladder and a longitudinal supporting part 210b longitudinally extending along the inner wall of the urethra, and the supporting strength of the longitudinal supporting part 210b of the stent can be improved by the winding way; one end of the auxiliary stent 220 is supported against the inner wall of the prostatic urethra, and the other end is fixed with the main stent 210 through a hub 300, as shown in fig. 3. The guide mechanism includes a retrieval catheter 400 extending from the hub 300 to outside the prostatic urethra through which the instrument can be conveniently removed from the patient.

In a preferred embodiment, the mesh-shaped stent is woven by using metal wires with a diameter of 0.5mm to 1mm, and the main body stent 210 is woven by using three main body metal wires, wherein each main body metal wire is wound in a manner of accommodating two ends of each main body metal wire into the hub 300 to form a substantially oval annular coil, each main body metal wire is wound with longitudinally extending sections of two other main body metal wires respectively and mutually wound with longitudinally extending sections of the other two main body metal wires in a process of forming the annular coil, as shown in fig. 1 and 2, the three main body metal wires are wound respectively and circularly to form annular coils on different planes, sections where the two main body metal wires are mutually wound form a longitudinal support portion 210b of the main body stent, and sections where the three metal wires independently extend circularly to form a circumferential support portion 210a of the main body stent. Auxiliary stand 220 adopts auxiliary wire to weave and forms, auxiliary wire length is less than main part wire length, auxiliary wire brings the mode of concentrator with both ends and winds formation arc loop, auxiliary stand supports to support on prostate urethra inner wall through the arc terminal surface of its first end.

The application principle of this embodiment is that after the mesh stent of this embodiment is placed in the patient, the longitudinal support portion 210b of the main stent 210 is supported on the inner wall of the prostatic urethra of the patient, and the device stays in the prostatic urethra of the patient for a certain period (e.g., several hours or several days), during which time the device makes a longitudinal incision in the surrounding inner wall tissue of the urethra to relieve urethral constriction; meanwhile, the auxiliary stent 220 is supported against the inner wall of the prostatic urethra (as shown in fig. 3) in a special shape so as to prevent the net stent from moving into the bladder of the patient, and the safety of the interventional therapy process can be effectively improved.

In a preferred embodiment, the metal wire includes a nickel alloy wire or a copper alloy wire, and the main metal wire and the auxiliary metal wire may be made of the same material or made of different materials.

In a preferred embodiment, the mesh stent is made of a shape memory alloy.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the utility model, and that, while the utility model has been described in detail with reference to the foregoing preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the utility model as defined by the appended claims; the sizes in the drawings and the embodiments are not related to specific objects, and are not used for limiting the protection scope of the utility model, and the sizes of the objects can be selected and changed according to actual needs.

Claims

1. An interventional instrument for alleviating prostatic hyperplasia, which is characterized by comprising a mesh stent formed by wire materials, wherein the mesh stent is provided with a main body stent, and the main body stent is provided with a circumferential supporting part circumferentially supported on the inner wall of the urethra of a bladder neck part and a longitudinal supporting part longitudinally extending along the inner wall of the urethra.

2. The interventional instrument for mitigating prostatic hyperplasia of claim 1, wherein the mesh stent further has an auxiliary stent supported against the prostatic urethra inner wall at one end.

3. The interventional instrument for alleviating prostatic hyperplasia of claim 2, wherein the main body stent and the auxiliary stent are jointly fixed by a hub.

4. The interventional instrument for alleviating prostatic hyperplasia of claim 3, wherein the mesh stent is woven from wire with a diameter of 0.5mm to 1 mm.

5. The interventional instrument for alleviating prostatic hyperplasia according to claim 4, wherein the main body stent is woven by three main body wires, wherein each main body wire forms an annular coil by taking both ends of the main body wire into the hubs, and each main body wire is intertwined with longitudinally extending sections of the other two main body wires respectively at a longitudinally extending section near both ends of the main body wire in the process of forming the annular coil; the sections of the two main body metal wires which are mutually wound form a longitudinal supporting part of the main body support, and the sections of the three metal wires which independently extend surround to form a circumferential supporting part of the main body support.

6. The interventional instrument for relieving prostatic hyperplasia of claim 5, wherein the auxiliary stent is woven by using an auxiliary metal wire, the length of the auxiliary metal wire is less than that of the main metal wire, the auxiliary metal wire is incorporated into the hubs at two ends to form an arc-shaped loop, and the auxiliary stent is supported on the inner wall of the prostatic urethra in an abutting mode through an arc-shaped end face of a first end of the auxiliary stent.

7. An interventional instrument for the relief of prostatic hyperplasia according to any of claims 3 to 6, further comprising a guide mechanism including a retrieval catheter extending from the hub to outside the prostatic urethra.

8. An interventional instrument for alleviating prostatic hyperplasia according to any one of claims 4 to 6, wherein the metal wire comprises a nickel alloy wire or a copper alloy wire.

9. An interventional instrument for relieving prostatic hyperplasia according to any one of claims 4-6, wherein the mesh stent is made of shape memory alloy.