CN114712663A - Urethral stent tube used after hypospadias repair - Google Patents

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a urethral stent tube used after a hypospadias repair operation. The urethra support tube comprises a main body in a tubular shell structure and a first sacculus fixed on one side of the outer wall of the main body in a surrounding mode. When the patient needs to put the urethral stent tube, the main body is inserted into the urethra and stops when the first balloon reaches the position of the prostatic fossa, and then the first balloon is inflated so that the first balloon is inflated to clamp the whole stent tube at the position of the prostatic fossa. Because the first balloon does not enter the bladder, the bladder wall is not pressed by the balloon in the catheterization time period, so that the patient does not feel uncomfortable or even the bladder spasm, and the comfort of the patient is greatly improved.

Description

Urethral stent tube used after hypospadias repair

Technical Field

The invention relates to the technical field of medical instruments, in particular to a urethral stent tube used after a hypospadias repair operation.

Background

The hypospadias are common deformities in the infantile urinary system, and the incidence rate reported abroad can reach 1 hypospadias in 125-250 born male infants, which is shown in the condition that the opening of the urethra is not at the common position of the glans. The urethral orifice can be distributed on the connecting line from the normal urethral orifice to the perineum, and most patients can be accompanied by the penis bending towards the ventral side.

Patients with hypospadias are often treated surgically with the goal of restoring the normal appearance and function of the penis. When an operator performs a hypospadias repair operation, the foreskin reel pipe needs to be sewn to form a new pipeline, and then the new pipeline is connected with the original urethra opening to prolong the length of the original urethra so that the urethra can be opened at the glans penis. The urethra sutured by the new roller tube is not firm after the operation, and the healing time is about 2 weeks. Therefore, the urethra support tube needs to be kept in place after the operation to support the newly-built urethra and prevent the urethra from collapsing.

However, conventional catheters are very prone to dislodgement and displacement of the catheter can not only cause a failed urethral reconstruction, but can also lead to some health complications. The current method of anti-detachment is to suture the catheter to the glans, but this method of fixation can cause the patient to become painful during removal of the catheter, sometimes even running down the long-term visible deep tract at the glans.

Another method is to arrange a balloon on the catheter, and fill the balloon after the balloon is placed in the bladder, so that the balloon is inflated in the bladder and the catheter can be placed to fall off. However, contact of the balloon with the inner wall of the bladder can cause bladder discomfort and even bladder spasms.

Disclosure of Invention

The invention discloses a urethral stent tube used after a hypospadias repair, which solves the problem that the bladder inner wall of a patient is stimulated by a balloon to cause discomfort of the patient by fixing the first balloon at the prostatic fossa.

In order to achieve the purpose, the invention adopts the following technical scheme:

a urethral stent tube for use after a hypospadias repair procedure, comprising:

a main body in a tubular shell structure for being placed into a urethra;

the first sacculus encircles and is fixed on one side of the outer wall of the main body and is used for being clamped in the prostate pit after being expanded.

Preferably, the disposable urethral catheter further comprises a second balloon which is fixedly connected to the other side of the outer wall of the main body in a surrounding mode and is used for abutting against the urethral orifice after being inflated.

Preferably, the first balloon and the second balloon are both polyurethane balloons.

Preferably, a plurality of through holes are arranged on the main body in a surrounding manner, and the through holes are positioned between the prostate and the urethral orifice.

Preferably, the through holes are distributed in an array.

Preferably, the aperture of the through hole is 2-3 mm.

Preferably, the air conditioner further comprises a bell mouth which is fixedly connected to the outlet side of the main body in a surrounding mode.

Preferably, the outer wall of the body is coated with an antimicrobial coating.

Preferably, the antibacterial coating is Bi₂O₃And (4) coating.

Preferably, the body is a silicone tube.

Compared with the prior art, the invention has the beneficial effects that:

according to the urethral stent tube used after the repair of the hypospadias, the main body of the stent tube and the first balloon are not in contact with the bladder wall, so that the bladder wall is not stimulated when a patient uses the urethral stent tube.

In addition, the second balloon is arranged at the urethral orifice, so that the stent tube main body can be stably fixed in the urethra. Through setting up first sacculus and second sacculus into the polyurethane sacculus, guaranteed that the sacculus inflation in-process is stable difficult for leaking. Through setting up support pipe main part exit end into the horn mouth form for the urine can not splash and pollute other positions. Through set up a plurality of through-holes on the support pipe main part for mucus that secretes in the urethra can be discharged along with the urine together and avoid the mucus gathering infection. By coating the outer wall of the body with antibacterial Bi₂O₃Coating layerSo that the patient has a reduced chance of infection.

Drawings

FIG. 1 is a schematic view of a conventional urethral catheter installation structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of a stent structure according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a stent tube according to an embodiment of the present invention;

fig. 4 is a schematic view of a use structure of the stent tube according to an embodiment of the present invention.

Description of the main element symbols: 1-bladder, 11-bladder neck, 12-urine, 2-prostate, 21-prostate fossa, 3-urethra, 31-urethral orifice, 32-mucus, 4-catheter, 41-liquid outlet, 42-balloon, 5-stent tube, 51-main body, 511-through hole, 512-horn mouth, 52-first balloon, 521-first opening, 522-first flow channel, 53-second balloon, 531-second opening and 532-second flow channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Examples

The hypospadias is a congenital urethral disease, the urethral orifice of a patient is not positioned at the protruding position of the glans penis, the urethral orifice can be distributed on the connecting line from the normal urethral orifice to the perineum, and most patients can be accompanied by the penis bending towards the ventral side.

Patients with hypospadia typically undergo surgical treatment to restore the positive appearance and function of the penis, such as extending the urethra to the usual position at the end of the penis. Postoperative patients often require insertion of a catheter within the urethra to assist in urethral shaping.

The urethral 3 stent tube 5 for post-urethral fissure repair disclosed in the present invention provides many benefits for the patient to recover from the operation. For example, the stent tube 5 disclosed herein includes a first balloon 52, the first balloon 52 being disposed within the fossa of the prostate 2 without contacting the bladder 1. In contrast to the known catheters 4, the disclosed catheter 4 does not cause discomfort or spasm of the bladder 1.

As shown in fig. 1, after the conventional catheter 4 is passed through the urethra 3 and enters the bladder 1, the balloon 42 is filled with saline, and then the balloon 42 is inflated, so that the balloon 42 fixes the catheter 4 in the bladder 1 and prevents the catheter 4 from slipping out of the bladder 1. Urine 12 in the bladder 1 is discharged through the outlet 41 at the upper part of the conduit 4. However, the balloon 42 has a certain weight after being injected with the physiological saline, and the balloon 42 is pressed against the inner wall of the bladder 1, so that the patient feels discomfort or even the bladder 1 is spastic after inserting the catheter 4. The prostate 2 is located below (approximately as shown) the bladder 1, and there is a natural concavity, the prostate 2 fossa, in the prostate 2, where the natural concavity is not well utilized when inserting the catheter 4.

As shown in fig. 2-3, the urethral 3 stent tube 5 includes a main body 51 and a first balloon 52. The main body 51 is a tubular shell structure and is used for being placed into the urethra 3, and the first balloon 52 is fixed on one side of the outer wall of the main body 51 in a surrounding mode and is used for being clamped in the prostate 2 fossa after being expanded. When the first balloon 52 is inflated in the prostate 2 fossa, the first balloon 52 is clamped with the prostate 2 fossa, so that the stent tube 5 of the urethra 3 can be fixed in the urethra 3. Meanwhile, as the first balloon 52 does not contact with the bladder wall at all, the bladder 1 is not stimulated, so that the use experience of the patient is better.

Specifically, in the initial state, the first balloon 52 is deflated and attached to the outer wall of the main body 51, and the stent tube 5 is pushed along the urethra 3 toward the bladder 1 until the first balloon 52 moves to the prostate 2 fossa. Then, gas or saline is injected into the first balloon 52, so that the first balloon 52 is inflated and clamped in the prostate 2 fossa, and the stent tube 5 is fixed. Preferably, the first balloon 52 is inflated with saline in this embodiment, since the balloon 42 is broken during inflation, which will inflate the urethra 3 and prevent it from being expelled.

The fixation of the single balloon 42 cannot completely lock the position of the stent tube 5, and in practical use, the stent tube 5 fixed only by the first balloon 52 may slide upwards or downwards, and if the stent tube slides upwards into the bladder 1, the first balloon 52 presses the bladder wall as the existing catheter 4. If slid down, the entire stent tube 5 will slide out of the urethra 3. Therefore, the second balloon 53 is also fixedly connected to the outer wall of the stent tube 5.

The second balloon 53 is fixed to the outer wall side of the main body 51 in a surrounding manner, like the first balloon 52. Specifically, as shown in fig. 3, the second balloon 53 is positioned at the ostium 3 of the urethra after inflation. When the second balloon 53 is inflated, having an outer diameter larger than the diameter of the urethra 3 ostium, the first balloon 52 and the second balloon 53 cooperate so that the stent tube 5 does not slip into the bladder 1.

Specifically, in the initial state, the second balloon 53 is deflated and attached to the outer wall of the main body 51, and the stent tube 5 is pushed along the urethra 3 toward the bladder 1 until the first balloon 52 moves to the prostate 2 fossa. After the first balloon 52 is flushed, gas or normal saline is injected into the second balloon 53, so that the second balloon 53 is expanded and then clamped outside the mouth of the urethra 3, and the stent tube 5 is fixed. Preferably, the first balloon 52 is inflated with sterile gas in this embodiment, since the inflation of saline will increase the self-weight of the stent tube 5, and thus increase the load at the wound of the patient.

Further, the conventional catheter 4 is positioned within the bladder 1, as shown in fig. 1, and the balloon 42 is inflated with saline to compress the bladder neck 11 below the bladder 1. Since the bladder neck 11 serves as the primary control of urination during the urinary process, the patient cannot control urination autonomously after insertion of the catheter 4. When the urine 12 stored in the bladder 1 reaches the upper part of the liquid outlet 41, the urine 12 is discharged along the conduit 4. As shown in fig. 3, after the stent tube 5 of the present application is inserted into the urinary catheter, the portion of the stent tube 5 beside the first balloon 52 is located in the urethra 3 between the bladder 1 and the prostate 2, i.e., the entire stent tube 5 is located inside the urinary catheter. When bladder neck 11 is not oppressed, it can independently control the shrink, realizes the switching of bladder 1, and then the patient can be after putting into support tube 5, can also independently control the micturition, comfort level greatly increased.

It will be appreciated that when using a conventional catheter 4, the balloon 42 presses against the bladder neck 11 and stimulates the bladder wall, and the patient is not able to control voluntary urination at this time, i.e. the urination orifice of the bladder 1 is open, and some patients may leak urine when the volume of urine 12 in the patient does not reach the location of the exit orifice 41. In use of the stent tube 5 of the present application, the balloon 42 seals the lower urethra 3 while not stimulating the bladder 1 because the balloon 42 is disposed within the prostate gland 2 fossa. When the patient urinates, the urine 12 can completely enter from the inlet end of the bracket pipe 5, so that the phenomenon that the clothes mattress is polluted due to urine leakage is avoided.

One of latex, silicone, and polyurethane materials may be used for the balloon 42. However, the balloon made of latex and silica gel may leak to be shriveled continuously after being damaged, so that the fixation of the stent tube 5 fails, and the stent tube 5 may descend along the urethra 3 and slip out of the urethra 3. When the balloon 42 made of polyurethane material is perforated like a needle hole, the same situation as the latex balloon 42 and the silica gel balloon 42 does not occur. The polyurethane balloon 42 can still maintain the original shape, so that the stent tube 5 remains fixed. Thus, in this embodiment, both the first balloon 52 and the second balloon 53 are polyurethane balloons 42. And the wall thickness of the polyurethane balloon 42 is only 5-30 μm, which can significantly reduce the stimulation of the balloon 42 to the urethra 3.

Specifically, with reference to fig. 3 and 4, first balloon 52 is inflated via first opening 521 and first flow path 522; second balloon 53 is inflated through second opening 531 and second fluid passage 532. Both the first 521 and second 531 openings are disposed outside the urethra 3 at a distance from the second balloon 53.

It will be appreciated that the proximity of the first opening 521 and the second opening 531 facilitates the operation of the operator when inflating the two balloons 42. The first flow passage 522 and the second flow passage 532 are both thin tubes (the tube diameters thereof are enlarged in the figure for clarity of illustration). When the first flow path 522 or the second flow path 532 is disposed on the outer wall of the main body 51, the protruding flow path may cause some irritation to the patient during intubation, causing discomfort to the patient. Therefore, as shown in fig. 3 and 4, the first flow channel 522 and the second flow channel 532 are both fixedly connected to the inner wall of the main body 51, and do not cause additional stimulation to the urethra 3 of the patient during intubation.

The wall tissue of the urethra 3 has more glands beside the urethra 3, which can secrete mucus 32 to lubricate the urethra 3. And the incision of the urethra 3 continues to leak interstitial fluid after the 3-way operation of the urethra, so that a large amount of mucus 32 accumulates in the urethra 3. In normal people, the secretion accumulated in the urethra 3 can be washed out by the urine 12 when urinating, but for the patient after the 3-urethra cleft operation, because the catheter is kept, the urine 12 is directly drained out of the catheter, and the urine 12 flowing in the catheter can not wash the secretion in the urethra 3 out of the body, which can seriously affect the healing of the cut of the urethra 3. Thus, intermittent irrigation of the urinary tract 3 secretions is a necessary measure to prevent infections in the urinary tract 3.

In the prior art, a urinary catheter device for use after hypospadias, which is convenient to wash and prevents wound infection, as disclosed in application No. 2020225484851, wherein a liquid discharge cavity communicated with the top end of a catheter body is arranged at the central position of a front 3-section of urethra, a porous annular washing cavity is arranged on the periphery of the liquid discharge cavity, and small holes are formed in the surface of the washing cavity. Referring to fig. 4 thereof, it can be understood that a medical solution or physiological saline may be injected into the flushing chamber through the flushing port. However, since the flushing port is arranged at the periphery of the liquid outlet, the urethra 3 is inevitably sterilized or other medicines are inevitably flushed back into the bladder 1 during flushing, and the inevitable damage is caused to the patient. Meanwhile, as some bacteria may be bred in the urethra 3, after the cavity is flushed, the bacteria inevitably enter the liquid discharge port and enter the bladder 1 of the patient in a countercurrent manner along with the next flushing, so that infection is caused.

Moreover, the secretion or mucus 32 is washed manually, and when medical care personnel forget to wash regularly, a large amount of secretion and mucus 32 accumulated in the urethra 3 of the patient are accumulated, bacteria are bred, and urinary tract infection of the patient can be caused.

In order to avoid the defect that the medical staff forget to flush the secretion, in the present invention, a plurality of through holes 511 are provided around the main body 51. Since the bladder 1 is not compressed after the patient inserts the urethral 3 stent tube 5 disclosed in the present invention, the patient can still control the bladder 1 to perform spontaneous urination. When the patient urinates, the urine 12 strikes the inner wall of the urethra 3 from the through hole 511, and the secretion on the inner wall of the urethra 3 is washed. Normal urination is approximately one minute, with one minute of uninterrupted urination capable of substantially flushing the secretions clean.

It will be appreciated that the through holes 511 are provided to avoid the first and second balloons 52, 53 as much as possible, so that the through holes 511 are located between the prostate 2 and the urethra 3 ostium. While providing sufficient through holes 511 in the mainly operated urethra 3 segment to allow sufficient passage of mucus 32 or secretions into the lumen of the body 51.

It can be understood that the inner wall of the urethra 3 is in full contact with the outer wall of the stent tube 5 after the stent tube 5 is inserted into the urethra 3. At this time, since the stent tube 5 is closely attached to the inner wall of the urethra 3, the mucus 32 between the stent tube 5 and the inner wall of the urethra 3 sufficiently flows into the stent tube 5 through the through hole 511. When the patient urinates, the urine 12 washes out the mucus 32 in the stent tube 5, and washes the inner wall of the urethra 3 at the through hole 511 to keep the urethra 3 clean.

In order to ensure the supporting strength of the stent tube 5 and to discharge as much mucus 32 and secretions as possible. The through holes 511 are generally distributed in an array, and the through holes 511 distributed in the array can keep the non-through hole 511 parts of the stent tube 5 continuous, thereby ensuring that the stent tube 5 has enough strength to support the urethra 3.

In particular, the main body 51 is generally silicone tubing, and is relatively stiff silicone tubing so that the stent tube 5 can support and assist in shaping the urethra 3.

Furthermore, the diameter of the opening of the through hole 511 is generally 2-3mm, and the through hole 511 with the diameter of 2-3mm can be matched with urine 12 well to flush out accumulated sediments, so that sufficient cleaning is ensured.

Meanwhile, as the patient can control the urination autonomously, the urine outlet of the bladder 1 can be closed, and the bladder 1 cannot be infected upwards even if bacteria exist in the urethra 3.

Further, as shown in fig. 3, the first flow passage 522 is located between two rows of the through holes 511, where the wall surface of the main body 51 is intact, so that the first flow passage 522 does not affect the passing ability of the mucus 32 or the secretion in the through holes 511. Similarly, as shown in fig. 4, the second flow path 532 is also located between the two rows of the through holes 511, where the wall of the main body 51 is intact, so that the second flow path 532 does not affect the passing of the mucus 32 or secretions through the through holes 511.

As shown in fig. 4, there is some mucus 32 between the inner wall of the urethra 3 and the main body 51, which needs to be flushed clean with the next urination. In the interval between the first and second urination, however, it is desirable to prevent bacterial growth of this portion of mucus 32. Specifically, an antibacterial coating is coated on the outer wall of the body 51.

The main pathogenic bacteria causing infection in urethra 3 are Escherichia coli and Staphylococcus aureus, and Bi₂O₃Can well inhibit the two pathogenic bacteria. Therefore, the outer wall of the urinary tract stent tube 5 is coated with Bi₂O₃The coating, which inhibits the proliferation of both bacteria in the mucus 32 during the two urinations, effectively prevents urinary tract infection in the patient.

With reference to figures 2-4, since intubation takes many days, if a urine bag is used, the nurse needs to constantly observe the amount of urine 12 in the patient's urine bag to prevent the urine bag from filling the patient's urethra 3 by back-flowing urine 12. In a preferred embodiment of the invention, the outlet end of the stent tube 5 of the urethra 3 is connected directly to the diaper. The urine storage volume of urine is big than the urine bag to use urine not wet can also avoid urine 12 to get into urethra 3 against the current, the nurse changes the number of times of urine not wet every day simultaneously and is less than and changes the urine bag number of times, has reduced nurse's work load.

However, the direct discharge has a problem that the urine 12 splashes, for example, when a nurse changes the diaper for a patient, if the patient urinates at that time (the patient generally refers to an infant patient, most of the infant patients perform an operation in a low age), the urine 12 is easily splashed and may contaminate the skin of other parts of the infant patient. Preferably, in the embodiment of the present invention, the bell mouth 512 is surrounded on the outer wall of the outlet side of the holder pipe 5. The flare 512 extends from the outlet end of the body 51 away from the outlet end and the opening becomes progressively larger. When the patient urinates, the urine 12 is surrounded by the bell mouth 512, and the splash pollution to the skin of the patient can be avoided.

When the stent tube 5 of the urethra 3 needs to be pulled out, only the physiological saline in the first balloon 52 needs to be pumped out through the first opening 521, and the gas in the second balloon 53 needs to be pumped out through the second opening 531. When the first balloon 52 and the second balloon 53 are deflated, they are attached to the outer wall of the main body 51 with only slight wrinkles. The fine wrinkles do not cause the patient to feel very uncomfortable during the process of withdrawing the stent tube 5.

It will be appreciated that the first 521 and second 531 openings are sealed when the stent tube 5 is retained within the patient's urethra 3 to ensure the inflated condition of the first 52 and second 53 balloons. The first and second openings 521 and 531 are opened when it is necessary to remove the stent tube 5, so that the first and second balloons 52 and 53 are deflated.

It should be understood that equivalents and modifications to the disclosed embodiments and inventive concepts may occur to persons skilled in the art, and all such modifications and/or alterations are intended to fall within the scope of the present invention.

Claims (10)

1. A urethra support tube for hypospadias restoration postoperative, its characterized in that includes:

a main body in a tubular shell structure for placement into a urethra;

the first sacculus encircles and is fixed on one side of the outer wall of the main body and is used for being clamped in the prostate pit after being expanded.

2. The urethral stent tube used after the repair of the hypospadias, according to claim 1, further comprising a second balloon fixedly connected to the other side of the outer wall of the main body in a surrounding manner for abutting against the urethral orifice after expansion.

3. The urethral stent tube used after a hypospadias repair of claim 2, wherein the first balloon and the second balloon are both polyurethane balloons.

4. A urethral stent tube for use after a hypospadias repair as claimed in claim 1, wherein a plurality of through holes are circumferentially provided on the body between the prostate and the urethral orifice.

5. The urethral stent tube for use after a hypospadias repair procedure of claim 4, wherein the through holes are distributed in an array.

6. The urethral stent tube used after the repair of the hypospadias according to claim 4, wherein the diameter of the through hole is 2-3 mm.

7. The urethral stent tube used after a hypospadias repair of claim 1, further comprising a flare which is fixedly connected around the outlet side of the body.

8. The urethral stent tube for use after repair of a hypospadias according to any one of claims 1 to 7, wherein the outer wall of the main body is coated with an antibacterial coating.

9. The urethral stent tube used after the repair of the hypospadias according to claim 8, wherein the antibacterial coating is Bi₂O₃And (4) coating.

10. The urethral stent tube used after a hypospadias repair procedure according to claim 1, wherein the main body is a silicone tube.

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