CN209734240U

CN209734240U - Novel prostate stent implanting device

Info

Publication number: CN209734240U
Application number: CN201920102616.8U
Authority: CN
Inventors: 程国政
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-22
Filing date: 2019-01-22
Publication date: 2019-12-06
Anticipated expiration: 2029-01-22

Abstract

The utility model discloses a novel prostate support implants in ware, concretely relates to medical instrument field, which comprises a bracket, the prostate support includes axial fixed connection's recovery part, fixed part and supporting part in proper order, the recovery part is formed by a plurality of "U" shape couple interconnect of falling, the couple is connected with conveying system and realizes retrieving and relocating the release, the fixed part is connected through the tie point by a plurality of net units and forms, the net unit is formed with latticed concatenation by a plurality of roof beams, and the concatenation point of roof beam and roof beam is the tie point promptly. The utility model discloses a set continuous spiral ring column structure to the supporting part of prostate support and extend along axial equidistance, this continuous spiral ring column structure forms through cutting process preparation, and radial holding power is at least for weaving 50 times of support to avoided lasting the prostate tissue of hyperplasia to collapse the problem of support, improved the life-span of support and the security of operation, reduced the operation risk.

Description

Novel prostate stent implanting device

Technical Field

The utility model relates to the technical field of medical equipment, more specifically say, the utility model relates to a novel prostate support implants ware.

background

The current standard for treating benign prostatic hyperplasia hypertrophy is transurethral prostatectomy, which is long in operation time, high in cost and contraindicated for the operation of elderly male patients complicated by various diseases at advanced age. Compared with the prior art, the interventional therapy has obvious advantages and is widely accepted and used. The prostate stent is placed in the prostatic urethra to be capable of stretching the prostatic urethra, so that mechanical obstruction caused by prostatic hyperplasia is relieved;

However, because the hyperplasia of prostate is a progressive process, the prostate stent is continuously extruded along with the continuous hyperplasia of prostate, and the existing prostate stent is formed by weaving a nickel-titanium alloy wire, the whole radial supporting force of the stent is small, so that the prostate stent is crushed by the continuously-proliferated prostate tissue, and further the urethra is narrowed, the stent may need to be taken out firstly, and the transurethral electrocision operation is performed on the prostate of a patient, so that the patient suffers from multiple pains, risks and expenses.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's above-mentioned defect, the embodiment of the utility model provides a novel prostate support implants ware, set continuous spiral tubular structure and extend along axial equidistance through the supporting part to prostate support, this continuous spiral tubular structure forms through cutting process preparation, radial holding power is at least for weaving 50 times of support, thereby avoided lasting the problem that the prostate tissue of hyperplasia collapses the support, the life-span of support and the security of operation have been improved, the operation risk is reduced, the little problem of prostate support radial holding power has been solved, the service life of support is prolonged.

in order to achieve the above object, the utility model provides a following technical scheme: a novel prostate stent implanter comprises a stent, wherein the stent comprises a recovery part, a fixed part and a supporting part which are sequentially and fixedly connected along the axial direction;

The bottom end of the recovery part is connected with the fixing part into a whole, the top end of the recovery part is arranged in a sheath of the interventional conveying equipment, the recovery part is arranged in a urethra, and the recovery part is used for recovering and releasing the stent again;

The two ends of the fixing part are respectively connected with the recovery part and the supporting part and are used for fixing the spherical parts of the bracket at the rear part of the urethra and in front of the sphincter;

The supporting part is arranged in the prostate and is used for expanding the hyperplastic prostate tissue;

The recovery part is formed by connecting a plurality of hooks through connecting points, each hook is formed by connecting two beams through the connecting points, the splicing points of the beams are the connecting points, and the hooks are connected with the conveying system to realize recovery and repositioning release.

In a preferred embodiment, the hook shape of the recovery part is an inverted "U" shape, the radian of the inverted "U" is alpha, and the alpha is between 0 and 100 degrees.

In a preferred embodiment, each hook of the recovery part extends in the axial direction with two beams and is connected to the fixing part.

In a preferred embodiment, the fixing portion is provided as a drum structure, and the diameter of the drum structure gradually increases from the distance from the recovery portion to the distance from the support portion and then gradually decreases.

In a preferred embodiment, the drum arc is β, and β is between 30 and 150 degrees.

In a preferred embodiment, the fixing part is formed by connecting a plurality of grid units through connecting points, the grid units are formed by splicing a plurality of beams in a grid shape, the splicing points of the beams are the connecting points, and membrane sewing holes are arranged between the recovery part and the fixing part.

In a preferred embodiment, the anchoring portion extends axially and is connected to the support portion by a "Y" beam having a length in the range of 1mm to 50 mm.

In a preferred embodiment, the diameter of the supporting part is kept constant from top to bottom, the supporting part is arranged in a spiral tubular structure, the supporting part is formed by connecting a plurality of spiral coils, the number of the spiral coils is 1-150, the diameter range of the spiral coils is 5-12 mm, and the distance between every two adjacent spiral coils is 0.1-1 mm.

In a preferred embodiment, the grid cell shape is provided as a spindle shape.

in a preferred embodiment, the number of hooks is 1, 2, 3, 4 or 6.

in a preferred embodiment, the number of grid cells corresponds to the number of hooks.

in a preferred embodiment, the stent body is made of a nitinol material.

the utility model discloses a technological effect and advantage:

1. the utility model sets the supporting part of the prostate stent into a continuous spiral ring-shaped structure and extends along the axial direction with equal distance, the continuous spiral ring-shaped structure is prepared by a cutting process, the radial supporting force is at least 50 times of that of the woven stent, thereby avoiding the problem that the continuously-proliferated prostate tissue collapses the stent, improving the service life of the stent and the safety of the operation, reducing the risk of the operation, solving the problem of small radial supporting force of the prostate stent and prolonging the service life of the stent;

2. The hook of the recovery part is in an inverted U-shaped structure, and the inverted U-shaped hook is not only beneficial to unhooking and releasing the support from the conveying system, but also beneficial to recovering the support into a sheath of the conveying system when the support has an error in specification selection or an error in releasing position;

3. the fixing part is of a drum-shaped structure, and the diameter of the fixing part is gradually increased from top to bottom and then gradually decreased, so that the radial supporting force of the fixing part can be improved, the bracket is more firmly fixed in the posterior bulboperineus urethra, and the bracket is prevented from being impacted and displaced by urine flow;

4. through the design of drum shape and spiral cylinder, any part of the bracket can not scratch the urethra and sphincter during the implantation or recovery process, and simultaneously, the stress distribution of each beam of the bracket is uniform, thereby reducing the operation difficulty and the operation failure probability.

drawings

Fig. 1 is a schematic structural view of a first embodiment of the prostatic stent of the invention;

FIG. 2 is a schematic view of the prostate stent retrieval portion of the present invention;

FIG. 3 is a schematic structural view of the fixing portion of the prostatic stent of the present invention;

Fig. 4 is a schematic structural view of a third embodiment of the prostatic stent of the invention;

FIG. 5 is a schematic view of the structure of the prostatic stent support of the present invention;

FIG. 6 is a schematic view of the retrieving portion and the fixing portion of the first embodiment of the prostatic stent of the invention;

fig. 7 is a schematic perspective view of the present invention.

The reference signs are: 11 a recovery part; 12 a fixing part; 13 a support part; 2, hooking; 3 connecting points; 4, 4 beams; 5 a grid cell; 6, laminating and sewing holes; a 7 "Y" beam; 8 helical turns.

Detailed Description

the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1, described below with reference to FIGS. 1 to 7;

the utility model provides a novel prostate stent implanter as shown in fig. 1 and fig. 6, which comprises a stent, wherein the stent comprises a recovery part 11, a fixed part 12 and a supporting part 13 which are fixedly connected in sequence along the axial direction;

The bottom end of the recovery part 11 is connected with the fixing part 12 into a whole, the hook 2 is connected with a conveying system, the recovery part 11 is arranged in the urethra, and the recovery part 11 is used for recovering and repositioning the release bracket;

the two ends of the fixing part 12 are respectively connected with the recovery part 11 and the supporting part 13 for fixing and supporting in the posterior bulboperineal urethra;

The supporting part 13 is arranged in the prostate and is used for expanding the hyperplastic prostate tissue;

The recovery part 11 is formed by a plurality of hooks 2, the hooks 2 are formed by two beams 4 which are connected through connecting points 3, the splicing points of the beams 4 are the connecting points 3, and the hooks 2 are connected with a conveying system to realize recovery and repositioning release.

Furthermore, the hook 2 of the recovery part 11 is in an inverted U-shaped structure, and the inverted U-shaped hook 2 is not only beneficial to unhooking and releasing the stent from the delivery system, but also beneficial to recovering the stent into a sheath of the delivery system when the stent has a wrong specification selection or a wrong release position; the radian of the inverted U-shaped part is alpha, the alpha is between 0 and 100 degrees, the included angle alpha is too large, and after the stent 1 is released and fixed on the rear section of the urethra, the recovery part 11 shields urine flow to form calculus;

Further, each hook 2 of the recovery part 11 extends in the axial direction with two beams 4 and is connected to the fixing part 12;

Furthermore, the fixing part 12 is a drum-shaped structure, and the diameter of the drum-shaped structure gradually increases from the position far away from the recovery part 11 to the position close to the supporting part 13 and then gradually decreases, so that the radial supporting force of the fixing part can be improved, the stent can be more firmly fixed in the posterior bulbourethral region, and the stent is prevented from being impacted and displaced by urine flow; the drum radian is beta, the beta is between 30 and 150 degrees, the larger the radian is, the larger the contact area of the drum and the rear bulbourethral part is, and the firmer the anchoring is; too small an arc β will increase the spring force when the stent 1 is unhooked in the urethra, resulting in stent 1 being released in the prostate to damage the posterior segment of the urethra or stent 1 being deflected from the anchoring position resulting in a release failure.

Further, the fixing portion 12 is formed by connecting a plurality of grid units 5 through connecting points 3, the grid units 5 are formed by splicing a plurality of beams 4 in a grid shape, the splicing points of the beams 4 are the connecting points 3, and a plurality of film coating sewing holes 6 are formed in the beams 4 of the fixing portion 12.

further, the fixing portion 12 extends in the axial direction through a "Y" shaped beam 7 and is connected to the supporting portion 13, and the length of the "Y" shaped beam 7 ranges from 1mm to 50 mm.

Furthermore, the diameter of the supporting part 13 is kept constant from top to bottom, the supporting part 13 is arranged to be a spiral tubular structure, the supporting part 13 is formed by connecting a plurality of spiral coils 8, the spiral distance is 0.1 mm-1 mm, the diameter range is 5 mm-12 mm, the continuous spiral tubular structure is prepared by a cutting process, the continuous structure ensures the continuous and uniform radial supporting force of the supporting part 13, and the support 1 is ensured not to deform due to the extrusion of continuously-proliferated prostate tissues and further not to be crushed to cause urethral restenosis; the interval of the continuous spiral coil of the supporting part 13 is not more than 1mm, so that the prostate tissue capable of ensuring hyperplasia can not enter the gap of the spiral coil of the supporting part 13, the effective service life of the stent 1 is ensured, and meanwhile, the stent 1 is difficult to recover due to the growth of the tissue.

Furthermore, the shape of the grid unit 5 is arranged to be fusiform, so that the stent 1 can be radially contracted and expanded, the urethra and the sphincter cannot be scratched at any part of the stent in the process of implantation or recovery, the stress distribution of each beam 4 of the stent is uniform, and the operation difficulty and the operation failure probability are reduced.

further, the number of the hooks 2 is 1, 2, 3, 4 or 6, and the number of the grid units 5 corresponds to the number of the hooks 2, so as to balance and absorb the stress when the hooks 2 are unhooked when the stent 1 is released in the urethra.

furthermore, the stent 1 is made of nickel-titanium alloy materials, so that the stent 1 can be easily assembled in ice-water mixture and compressed into a conveying system, and can automatically expand to the original shape and specification again after being released at body temperature.

Example 2, described below with reference to FIGS. 1 to 7;

when the continuous spiral tubular structure is used specifically, the supporting part 13 is composed of a continuous spiral tubular structure, the supporting part 13 is formed by connecting a plurality of spiral rings, the spiral distance is 0.5mm, the diameter is 10mm, the continuous spiral tubular structure is prepared by a cutting process, the continuous structure ensures the continuous and uniform radial supporting force of the supporting part 13, and the support 1 is ensured not to deform due to extrusion of continuously-proliferated prostate tissues and further not to be crushed to cause urethral restenosis; the interval of the continuous spiral coil of the supporting part 13 is 0.5mm, the interval can ensure that the hyperplastic prostate tissue can not enter the gap of the spiral coil of the supporting part 13, the effective working life of the stent 1 is ensured, and meanwhile, the stent 1 is difficult to recover due to the growth of the tissue.

example 3, described below with reference to FIGS. 1 to 7;

In the present application, the anchoring portion 12 extends axially through a "Y" beam 7 and is connected to the supporting portion 13, the length of the "Y" beam 7 being 5mm, which facilitates the supporting portion 13 of the stent 1 to avoid the sphincter at the rear of the urethra and thus avoid causing urinary incontinence, see fig. 4 of the present specification.

the utility model discloses the theory of operation:

referring to the attached figure 1 of the specification, when in use, the prostate stent is placed in the urethra to open the prostate, the recovery part 11 is used for recovering and releasing the stent 1 again, the fixing part 12 is used for fixing the stent 1, and the supporting part 103 is used for opening the hyperplastic prostate tissue;

referring to the attached figure 1 of the specification, the reverse U-shaped hook 2 of the recovery part 11 is arranged to facilitate unhooking and releasing of the stent from a conveying system, and to facilitate recovering the stent 1 into the conveying system when the stent is mistakenly selected in specification or mistakenly released, and the diameter of the fixing part 12 is gradually increased from top to bottom and then gradually decreased, so that the drum-shaped arrangement can improve the radial supporting force of the fixing part 12, increase the contact area of the fixing part 12 and the posterior bulbourethral part, ensure that the stent is more firmly fixed in the posterior segment of the urethra, and prevent the stent from being impacted and displaced by urine flow;

Referring to the attached drawings 1 and 5 of the specification, the supporting part 13 is composed of a continuous spiral tubular structure, the supporting part 13 is formed by connecting a plurality of spiral coils, the spiral distance is 0.1 mm-1 mm, the diameter range is 5 mm-12 mm, the continuous spiral tubular structure is prepared by a cutting process, the continuous structure ensures the continuous and uniform radial supporting force of the supporting part 13, and the stent 1 is ensured not to deform due to the extrusion of continuously-proliferated prostate tissues and further not to be crushed to cause urethral restenosis; the interval of the continuous spiral coil of the supporting part 13 is not more than 1mm, so that the prostate tissue capable of ensuring hyperplasia can not enter the gap of the spiral coil of the supporting part 13, the effective service life of the stent 1 is ensured, and meanwhile, the stent 1 is difficult to recover due to the growth of the tissue.

the points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," "connecting," and "connecting" should be interpreted broadly, and may be mechanical connection, or communication between two elements, and may be directly connected, and "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed;

Secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the design idea or principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel prostate stent implanter comprises a stent and is characterized in that: the bracket comprises a recovery part (11), a fixing part (12) and a supporting part (13) which are axially and sequentially fixedly connected; the recovery part (11) is connected with the conveying system to realize the recovery and the repositioning release of the stent; the fixing part (12) is used for fixing the bracket; the supporting part (13) is used for expanding the hyperplastic prostate tissue and is a functional part of the bracket;

The recovery part (11) is formed by connecting a plurality of hooks (2) through connecting points (3), and the hooks (2) are connected with a conveying system to realize recovery and repositioning release.

2. the novel prostatic stent implanter of claim 1, wherein: the hook (2) of the recovery part (11) is in an inverted U-shaped structure, the radian of the inverted U-shaped structure is alpha, and the alpha is between 0 and 100 degrees.

3. The novel prostatic stent implanter of claim 2, wherein: each hook (2) of the recovery section (11) extends in the axial direction with two beams (4) and is connected to the fixing section (12).

4. The novel prostatic stent implanter of claim 3, wherein: the fixing part (12) is arranged to be a drum-shaped structure, and the diameter of the drum-shaped structure is gradually increased and then gradually decreased from the position far away from the recovery part (11) to the position close to the supporting part (13);

the arc of the drum-shaped structure is beta, and the beta is between 30 and 150 degrees; the fixing part (12) is formed by connecting a plurality of grid units (5) through connecting points (3), the grid units (5) are formed by splicing a plurality of beams (4) in a grid shape, and the splicing points of the beams (4) are the connecting points (3); the beam (4) of the fixing part (12) is provided with a plurality of film sewing holes (6).

5. The novel prostatic stent implanter of claim 4, wherein: the fixing part (12) extends axially through a Y-shaped beam (7) and is connected to the supporting part (13), and the length of the Y-shaped beam (7) ranges from 1mm to 50 mm.

6. the novel prostatic stent implanter of claim 5, wherein: the diameter of the supporting part (13) is kept unchanged from top to bottom, the supporting part (13) is arranged to be of a spiral ring-shaped structure, the supporting part (13) is formed by connecting a plurality of spiral rings (8), the number of the spiral rings (8) is 1-150, the diameter range of the spiral rings (8) is 5-12 mm, and the distance between every two adjacent spiral rings (8) is 0.1-1 mm.

7. The novel prostatic stent implanter of claim 6, wherein: the grid unit (5) is arranged in a spindle shape.

8. the novel prostatic stent implanter of claim 7, wherein: the number of the hooks (2) is 1, 2, 3, 4 or 6.

9. The novel prostatic stent implanter of claim 8, wherein: the number of the grid units (5) corresponds to the number of the hooks (2).

10. The novel prostatic stent implanter of claim 1, wherein: the stent is made of a nickel-titanium alloy material.