CN114391802A - Damage-preventing cystoscope feeding device for urethral prostate operation - Google Patents

Abstract

The invention relates to the technical field of medical instruments, in particular to an injury-preventing cystoscope feeding device for urethral prostate surgery, which comprises an outer bracket, a guide part and a plurality of urethral expansion parts, wherein the outer bracket is arranged on an operating handle part, the urethral expansion parts are detachably connected to the guide part, and the urethral expansion parts expand radially and axially at a working temperature.

Description

A kind of anti-injury cystoscope delivery device for urethra and prostate surgery

technical field

The invention relates to the technical field of medical devices, in particular to an anti-injury cystoscope feeding device for urethra and prostate surgery.

Background technique

Cystoscope is a type of endoscope. Cystoscope is required for surgery or detection of bladder cancer. When using cystoscope, it needs to enter the bladder through the urethra, and there are several small mesh holes on the outer tube wall of the cystoscope. , When the cystoscope enters the urethra, the mesh-shaped holes rub against the urethra, which may damage the urethral mucosa and form urethral stricture, which will cause pain and unnecessary risks to the patient in the later treatment process. Therefore, the cystoscope will be used in advance. A stent tube is implanted in the urethra to protect the urethra.

The stent tube in the prior art is a pipe with a circular shape. When in use, the stent tube enters the urethra from the outer opening of the urethra and extends into the body along the urethra until the end of the stent tube enters the bladder.

As shown in FIG. 1 , it is a schematic structural diagram of a stent tube in the prior art, including an operating handle portion 1 and a pipe fitting 2 . The operating handle portion 1 is provided with a plurality of instrument channels 102 for accommodating medical instruments. The handle part 1 is detachably connected with the pipe part 2 through a joint. During the use of the stent tube, one end of the tube 2 is inserted into the bladder through the urethra, and the other end is connected to the operating handle 1. Medical tools such as endoscopes and electric cutters can enter the bladder through the instrument channel 102 to inspect the interior of the bladder and Operation.

However, in order to improve the ability of the pipe fitting 2 to accommodate medical instruments and medical tools in the prior art, the pipe fitting 2 with a larger diameter and length will be selected as much as possible within the range of urethral expansion. The diameter is generally slightly larger than the inner diameter of the urethra. In the process of inserting the tube 2 into the urethra, the surface of the tube 2 is in contact with the inner wall mucosa of the urethra from the very beginning. During the movement of the tube 2, its surface will slide with the inner wall mucosa of the urethra. The urethra is damaged due to friction. The insertion length of the pipe fitting 2 is the length of friction in the urethra. As the insertion length of the pipe fitting 2 increases, the degree of damage to the urethra will also increase. During the process of urethral extraction, secondary friction occurs with the inner wall mucosa, which further increases the degree of urethral damage.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the defect that the implanted stent tube causes damage to the urethra in the prior art, and proposes an anti-injury cystoscope delivery device for urethra and prostate surgery.

In order to achieve the above object, the present invention adopts the following technical solutions:

A damage-proof cystoscope feeding device for urethra and prostate surgery is designed, which includes an outer support, a guide piece and a plurality of urethral expansion pieces, the outer support is installed on the operating handle portion, and the urethral expansion piece is detachably connected to the urethral expansion piece. On the guide member, the urethral dilator undergoes radial expansion and axial expansion under working temperature.

Preferably, the working temperature is 39-42 degrees Celsius.

Preferably, the urethral dilator includes a jacket, an obtuse-angle portion, a core piece and an expansion mechanism, both ends of the jacket are fixed to the obtuse-angle portion, the obtuse-angle portion is fixed to the core piece, and the expansion mechanism mounted on the core.

Preferably, the outer casing, the obtuse angle portion and the core are all made of reversibly deformable materials.

Preferably, the expansion mechanism includes a plurality of radial expansion structures and a plurality of axial expansion structures, a plurality of the radial expansion structures are fixed on the core piece at equal intervals, and the axial expansion structures are located adjacent to each other. between the two radially expanding structures.

Preferably, the radial expansion structure includes a plurality of connecting pieces and a plurality of first memory wires, the plurality of the connecting pieces are fixed on the outer wall of the core piece at equal intervals, and the plurality of the connecting pieces are on the same circumference Above, the first memory wire is located between two adjacent connecting pieces, and both ends of the first memory wire are fixed on the connecting pieces.

Preferably, the axially expanding structure includes a second memory wire, and both ends of the second memory wire are fixed on the connector.

The invention proposes an anti-damage cystoscope feeding device for urethra and prostate surgery. The beneficial effect is that the cystoscope feeding device provided by the present invention will not rub against the urethral inner wall mucosa during the loading and unloading process. , greatly reducing the damage to the urethra caused by prostate surgery. In addition, compared with the traditional stainless steel tube, the urethral dilator provided by the present invention has a simple structure and low cost, can be used as a disposable medical device, and can effectively reduce the risk of cross infection of the urethra.

Description of drawings

FIG. 1 is a schematic structural diagram of a stent tube in the prior art.

FIG. 2 is a schematic structural diagram of an anti-injury cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

FIG. 3 is a schematic structural diagram of a damage-resistant cystoscope delivery device for urethra and prostate surgery proposed by the present invention, which is loaded into the urethra.

4 is a schematic structural diagram of the expanded urethral dilator of an anti-injury cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

FIG. 5 is a cross-sectional view of an anti-injury cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

FIG. 6 is a schematic structural diagram of a urethral dilator of a damage-resistant cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

7 is a front view of a urethral dilator of a damage-resistant cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

FIG. 8 is a cross-sectional view along A-A of the urethral dilator of a damage-resistant cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

FIG. 9 is a schematic diagram of the internal structure of a urethral dilator of a damage-resistant cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

10 is a schematic structural diagram of a core piece of a damage-resistant cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

FIG. 11 is a first structural schematic diagram of an expansion mechanism of an anti-injury cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

FIG. 12 is a schematic structural diagram of the expanded urethral dilator of an anti-injury cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

13 is a schematic structural diagram of the expanded core piece of an anti-trauma cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

FIG. 14 is a second structural schematic diagram of an expansion mechanism of an anti-injury cystoscope delivery device for urethra and prostate surgery proposed by the present invention.

Detailed ways

The technical solutions in the 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

1-8, a damage-proof cystoscope delivery device for urethral prostate surgery, comprising an outer support 3, a guide member 4 and a plurality of urethral dilation pieces 5, the outer support 3 is installed on the operating handle portion 1, and the urethra expands. The member 5 is detachably connected to the guide member 4, and the urethral dilation member 5 undergoes radial expansion and axial expansion under the condition of a temperature of 39-42 degrees Celsius.

The urethral dilator 5 includes an outer sleeve 501, an obtuse angle part 502, a core part 503 and an expansion mechanism 6, the two ends of the outer sleeve 501 are fixed with the obtuse angle part 502, the obtuse angle part 502 is fixed on the core part 503, and the expansion mechanism 6 is installed on the core part 503 Above, the outer casing 501, the obtuse-angled portion 502 and the core piece 503 are all made of reversibly deformable materials.

The manufacturing method of the outer shell 501, the obtuse-angle portion 502 and the core piece 503 is as follows: adding magnetic powder to the molten silica gel material to form a silica gel mixture, injecting the silica gel mixture into the mold, and after the mold is cooled, the mold can be demolded. The outer casing 501, the obtuse corner 502 and the core 503 are required.

A small hole is opened in the middle of the core piece 503, and the guide piece 4 is a thin tube made of carbon fiber material, and the outer diameter of the thin tube is slightly larger than the inner diameter of the small hole. friction to hold the urethral dilator 5 on the thin tube

The expansion mechanism 6 includes a plurality of radial expansion structures and a plurality of axial expansion structures. The multiple radial expansion structures are fixed on the core member 503 at equal intervals, and the axial expansion structures are located between two adjacent radial expansion structures. .

As shown in FIGS. 9-14 , the radially expanding structure includes a plurality of connectors 601 and a plurality of first memory wires 602 . The plurality of connectors are fixed on the outer wall of the core 503 at equal intervals, and the plurality of connectors 601 are in the same On the circumference, the first memory wire 602 is located between two adjacent connecting pieces 601 , and both ends of the first memory wire 602 are fixed on the connecting piece 601 . The first memory metal wire 602 has a two-way memory effect, and its metamorphosis temperature is 39 degrees Celsius. When the temperature is above 39 degrees Celsius, the first memory metal wire 602 is in a spiral shape, and when the temperature is below 39 degrees Celsius, the first memory metal wire. 602 has an arc shape.

The axially expanding structure includes a second memory wire 603 , and both ends of the second memory wire 603 are fixed on the connector 601 . The second memory metal wire 603 has a two-way memory effect, and its metamorphosis temperature is 42 degrees Celsius. When the temperature is above 42 degrees Celsius, the second memory metal wire 603 is in a spiral shape, and when the temperature is below 42 degrees Celsius, the second memory metal wire 603 is straight.

working principle:

The urethral dilator 5 is fixed on the thin tube by means of friction, and the temperature of the thin tube is controlled by blowing hot air into the thin tube.

The shilling straw is kept at a temperature of 43 degrees Celsius. The normal human body temperature range is between 36.5 and 37.5 degrees Celsius, and the temperature between 14.2 and 46.5 degrees Celsius will not cause greater stimulation to the human body.

Since the metamorphosis temperature of the second memory wire 603 is 42 degrees Celsius, the metamorphosis temperature of the first memory wire 602 is 39 degrees Celsius, and 43 degrees Celsius is higher than the metamorphosis temperature of the two, therefore, the first memory wire 602 and the second memory wire 603 will not deform.

The operating handle part 1 is connected with the outer bracket 3, and the outer bracket 3 is sleeved around the periphery of the penis.

The thin tube and the urethral dilator 5 are sent into the urethra through the instrument operation channel 102. The outer diameter of the thin tube is smaller than the inner diameter of the urethra, and the end of the thin tube is chamfered to prevent damage to the inner wall mucosa when the thin tube enters the urethra. The thin tube is made of carbon fiber. When the thin tube enters the urethra, the thin tube will deform according to the inner contour of the urethra, reducing the large axial force on the urethra during the insertion of the tube.

As shown in Figure 9-14, the urethral dilator 5 enters the urethra with the thin tube, lowers the temperature of the thin tube, and keeps the temperature of the thin tube between 39-42 degrees Celsius. At this time, the temperature of the thin tube will be lower than the second memory At the abnormal temperature of the metal wire 603, the second memory metal wire 603 will be deformed, so that the second memory metal wire 603 changes from a spiral state to a linear shape. The tube expands axially. After the two adjacent urethral dilation pieces 5 are in contact, the adjacent core pieces 503 will be magnetically adsorbed together due to the presence of the magnetic powder, and all the urethral dilation pieces 5 are magnetically connected to form a relatively small space. A long tubular member, one end of which is located in the bladder, and the other end is attached to the connector 102.

Reduce the temperature of the thin tube again (the temperature of the thin tube can be controlled by passing cold air into the thin tube), so that the temperature of the thin tube is kept between 37.5-39 degrees Celsius. At this time, the temperature of the thin tube is lower than the first memory The abnormal temperature of the metal wire 602, the temperature of the first memory metal wire 602 decreases and deforms, and the deformed first memory metal wire 602 changes from a spiral shape to an arc shape, so that the core piece 503 radially expands, and the core piece 503 radially expands. During the process, the diameter and length of the small holes inside will also increase. After the small hole diameter increases, it will be separated from the thin tube. At this time, the thin tube can be pulled out. After the diameter of the small hole expands to the maximum range, that is, An endoscope or other medical tool can be loaded through the instrument channel 101 .

When the urethral dilator 5 is taken out, the thin tube is inserted into the small hole through the instrument channel 101 again, and the temperature of the thin tube is heated. First, the temperature of the thin tube is kept between 39-42 degrees Celsius. The metamorphosis temperature of the first memory wire 602 is lower than the metamorphosis temperature of the second memory wire 603, the second memory wire 603 does not change, the first memory wire 602 is restored, and the diameter of the first memory wire 602 will change during the restoration process. The inner diameter of the small hole will also decrease accordingly, until the inner wall of the small hole abuts against the outer wall of the thin tube again, at this time, the urethral dilator 5 will be fixed on the thin tube again.

Next, the temperature of the thin tube is heated to keep the temperature at 43 degrees Celsius. At this time, the temperature of the thin tube is higher than the abnormal temperature of the second memory wire 603, the second memory wire 603 is restored, and the core member 503 is also axially rotated. recovery.

After the restoration of the urethral dilator 5 is completed, the thin tube is pulled out from the instrument channel 101, and the urethral dilator 5 is also taken out from the urethra.

The cystoscope feeding device provided by the present invention will not cause friction with the mucous membrane of the inner wall of the urethra during the process of loading and unloading, thereby greatly reducing the damage to the urethra caused by prostate surgery. In addition, compared with the traditional stainless steel tube, the urethral dilator provided by the present invention has a simple structure and low cost, can be used as a disposable medical device, and can effectively reduce the risk of cross infection of the urethra.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (7)

1. an anti-injury cystoscope feeding device for urethral prostate surgery, is characterized in that, comprises outer support (3), guide (4) and a plurality of urethral expansion pieces (5), described outer support (3) Installed on the operating handle part (1), the urethral dilator (5) is detachably connected to the guide member (4), and the urethral dilator (5) undergoes radial expansion and Axial expansion. 2 . The injury-proof cystoscope feeding device for urethra and prostate surgery according to claim 1 , wherein the working temperature is 39-42 degrees Celsius. 3 . 3. The injury-proof cystoscope delivery device for urethral prostate surgery according to claim 2, wherein the urethral dilator (5) comprises a jacket (501), an obtuse angle (502), a core ( 503) and an expansion mechanism (6), the two ends of the outer sleeve (501) are fixed to the obtuse angle portion (502), and the obtuse angle portion (502) is fixed to the core piece (503), and the expansion A mechanism (6) is mounted on the core (503). 4. The damage-resistant cystoscope delivery device for urethra and prostate surgery according to claim 3, characterized in that, the outer sleeve (501), the obtuse angle portion (502) and the core piece (503) are all Made of reversibly deformable material. 5. The injury-proof cystoscope delivery device for urethra and prostate surgery according to claim 3, wherein the expansion mechanism (6) comprises a plurality of radial expansion structures and a plurality of axial expansion structures, and a plurality of Each of the radial expansion structures is fixed on the core piece (503) at equal intervals, and the axial expansion structures are located between two adjacent radial expansion structures. 6. The damage-resistant cystoscope delivery device for urethra and prostate surgery according to claim 5, wherein the radial expansion structure comprises a plurality of connectors (601) and a plurality of first memory wires ( 602), a plurality of the connecting pieces are fixed on the outer wall of the core piece (503) at equal intervals, a plurality of the connecting pieces (601) are located on the same circumference, and the first memory wires (602) are located on the same circumference. between two adjacent connecting pieces (601), and both ends of the first memory wire (602) are fixed on the connecting piece (601). 7. An injury-proof cystoscope delivery device for urethra and prostate surgery according to claim 6, wherein the axial expansion structure comprises a second memory wire (603), and the second memory wire (603) Both ends are fixed on the connecting piece (601).

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