Disposable urethral balloon dilatation catheter

Abstract

The present invention relates to the field of medical device technology, and specifically to an innovative disposable catheter for soft dilation of urethral stricture, especially continuous dilation to treat posterior urethral stricture and bladder neck obstruction. The present invention utilizes a fixed balloon and a highly inflatable balloon to dilate the posterior urethra or bladder neck to 28F-40F through a soft dilation method, achieving a better long-term efficacy, effectively preventing the recurrence of urethral stricture, and the effect of the balloon on the urethra wall is radially expanded, so that each part is evenly stressed, bleeding is less, and there is no obvious damage to the normal urethra; for cases where the dilation time needs to be extended, the disposable urethral balloon dilation catheter of the present invention is effectively prevented from slipping by fixing the urethra through a fixed balloon, thereby improving the success rate of the operation, and the present invention can dilate the posterior urethra or bladder neck for up to 24h-72h, which has a good effect on intractable urethral scars.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a disposable urethral balloon dilation catheter. Background Art

[0002] Urethral stricture has a high incidence rate and is common in prostate surgery, urethral trauma, etc. It is a common disease in urology. Recurrent posterior urethral stricture or bladder neck obstruction is one of the difficulties in the treatment of urology. Urethral obstruction can be treated by internal urethrotomy or transurethral bladder neck resection, but the recurrence rate of postoperative obstruction is 20%-40%. Although regular use of 10F-26F rigid metal rods for urethral dilation can partially prevent the recurrence of urethral stricture, it has several disadvantages: first, the shape of the metal dilation rod is thin at the front end and thick at the back end, but the bladder neck needs to be expanded to 28F-40F, which cannot be achieved by the metal dilation rod; second, the existing urethral dilation instruments can only expand the stricture for 5 to 20 minutes and cannot achieve continuous expansion for 24 to 72 hours; third, traditional urethral dilation instruments are inserted into the bladder neck from the urethral opening, which is the thinnest part of the entire urethra. The urethral dilation instruments currently used in clinical practice are all made of rigid materials or metal. Although surface anesthetics are used, the dilation process is still very painful, and the patient's pain is significant, which affects the efficacy of the dilation. Some patients refuse urethral dilation due to fear of pain.

[0003] Accordingly, the art needs a new disposable urethral balloon dilation catheter to solve the above problems. Summary of the invention

[0004] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the existing urethral dilation instruments are inconvenient to use due to the small dilatation range and short dilatation duration, and the problem that the patient suffers obvious pain during treatment due to the characteristics of the material, the present invention provides a disposable urethral balloon dilation catheter. The disposable urethral balloon dilation catheter includes an outer catheter, and the inner part of the outer catheter is provided with a first horizontal passage, a third horizontal passage with a built-in support guide wire, and a second horizontal passage from bottom to top. The outer catheter includes a first end and a second end, the first end is a guide portion, the first end is provided with a through hole, and the through hole is connected to the third horizontal passage, and the second end is fixedly provided with a first connecting valve, the first connecting valve includes a third end and a fourth end, the third end is connected to the fourth section, the third end is connected to the third horizontal passage with a built-in support guide wire, and the fourth end is connected to a urine drainage bag, and the urine drainage bag is connected to the third horizontal passage through the first connecting valve, and moves away from the urine drainage bag. In the direction of the first connecting valve, the outer catheter is sequentially provided with a first catheter seat fixedly connected to the outer catheter, a second catheter seat, a first horizontal passage opening, a second horizontal passage opening, a fixed balloon sealedly installed in the first horizontal passage opening, and a highly expandable balloon sealedly installed in the second horizontal passage opening; the first catheter seat includes a fifth end and a sixth end, the fifth end is fixedly connected with the second connecting valve, the sixth end is connected with the fixed balloon through the first horizontal passage, the second catheter seat includes a seventh end and an eighth end, the seventh end is fixedly connected with the third connecting valve, and the eighth end is connected with the highly expandable balloon through the second horizontal passage.

[0005] In the above preferred technical solution, further, the first horizontal passage opening and the second horizontal passage opening are arranged on both sides of the outer conduit.

[0006] In the above preferred technical solution, further, the first catheter seat and the second catheter seat are arranged on both sides of the outer catheter.

[0007] In the above preferred technical solution, further, the outer catheter is provided with a scale.

[0008] In the above preferred technical solution, further, the measuring range of the scale is 410 mm.

[0009] In the above preferred technical solution, further, the first end, the second connecting valve and the third connecting valve are all provided with detachable dust covers.

[0010] In the above preferred technical solution, further, the fixed balloon is spherical after being filled, and the highly expandable balloon is cylindrical after being filled.

[0011] In the above preferred technical solution, further, the disposable urethral balloon dilatation catheter is made of a polymer material such as silicone rubber, latex, and resin.

[0012] The present invention has at least the following beneficial technical effects: First, the present invention utilizes a fixed balloon and a highly expandable balloon to expand the posterior urethra or bladder neck to 28F-40F through a soft expansion method, thereby achieving better long-term efficacy and effectively preventing the recurrence of urethral stenosis. The effect of the balloon on the urethra wall is radial expansion, so that each part is evenly stressed, bleeding is less, and there is no obvious damage to the normal urethra; Second, for cases where the expansion time needs to be extended, the disposable urethral balloon dilation catheter of the present invention is effectively prevented from slipping by fixing the urethra in the urethra by using a fixed balloon, thereby improving the success rate of the operation. The expansion of the posterior urethra or bladder neck of the present invention can last for 24h-72h, and has a good effect on stubborn urethral scars. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is described below with reference to the accompanying drawings. In the accompanying drawings:

[0014] Figure 1 Figure (1) is a schematic diagram of the use state of the present invention;

[0015] Figure 2 Figure (ii) is a schematic diagram of the use state of the present invention;

[0016] Figure 3 Figure (iii) is a schematic diagram of the use status of the present invention.

[0017] Reference numerals list

[0018] 1. outer catheter; 2. first horizontal passage; 3. third horizontal passage; 4. second horizontal passage; 5. support guide wire; 6. first end; 7. second end; 8. through hole; 9. first connecting valve; 10. third end; 11. fourth end; 12. urine drainage bag; 13. first catheter seat; 14. second catheter seat; 15. first horizontal passage opening; 16. second horizontal passage opening; 17. fixed balloon; 18. highly expandable balloon; 19. fifth end; 20. sixth end; 21. second connecting valve; 22. seventh end; 23. eighth end; 24. third connecting valve; 25. scale; 26. dust cover. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0020] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] First refer to Figures 1 to 3 , the disposable urethral balloon dilatation catheter of the present invention is described.

[0023] To solve the existing problems, the present invention provides a disposable urethral balloon dilatation catheter, including an outer catheter 1, wherein a first horizontal passage 2, a third horizontal passage 3 with a built-in support guide wire 5, and a second horizontal passage 4 are sequentially arranged inside the outer catheter 1 from bottom to top, the outer catheter 1 includes a first end 6 and a second end 7, the first end 6 is a guide portion, the first end 6 is provided with a through hole 8, the through hole 8 is connected to the third horizontal passage 3, the second end 7 is fixedly provided with a first connecting valve 9, the first connecting valve 9 includes a third end 10 and a fourth end 11, the third end 10 is connected to the fourth section 11, the third end 10 is connected to the third horizontal passage 3 with a built-in support guide wire 5, the fourth end 11 is connected to a urine drainage bag 12, the urine drainage bag 12 is connected to the third horizontal passage 3 through the first connecting valve 9, and the outer catheter 1 is sequentially arranged in a direction away from the first connecting valve 9. There are a first catheter seat 13, a second catheter seat 14, a first horizontal passage opening 15, a second horizontal passage 16 opening, a fixed balloon 17 sealedly installed at the first horizontal passage opening 15, and a highly expandable balloon 18 sealedly installed at the second horizontal passage opening 16, the first catheter seat 13 includes a fifth end 19 and a sixth end 20, the fifth end 19 is fixedly connected with a second connecting valve 21, the second connecting valve 21 is used to connect to a filling catheter for filling the fixed balloon with liquid, the sixth end 20 is connected to the fixed balloon 17 through the first horizontal passage 2, the second catheter seat 14 includes a seventh end 22 and an eighth end 23, the seventh end 22 is fixedly connected with a third connecting valve 24, the third connecting valve 24 is used to connect a high-pressure syringe, and the eighth end 23 is connected to the highly expandable balloon 18 through the second horizontal passage 4. The working principle of the present invention is as follows: a mucosal anesthetic is injected through the urethra, the guide part of the disposable urethral balloon dilatation catheter of the present invention is inserted from the external urethral opening, a highly expandable balloon 18 is placed at the urethral stricture section or bladder neck obstruction under ultrasound guidance, and then a high-pressure syringe is connected to the third connecting valve 24, the highly expandable balloon 18 is filled by the high-pressure syringe, and the urethral scar is torn by the highly expandable balloon 18; for posterior urethral stricture or bladder neck obstruction that requires continuous expansion, a fixed balloon 17 can be further filled in the bladder to prevent the disposable urethral balloon dilatation catheter of the present invention from slipping, and a urine drainage bag 12 connected to the fourth end 11 can help the patient urinate during the operation.

[0024] The advantages of the above arrangement are: First, the present invention utilizes a fixed balloon and a highly expandable balloon to expand the posterior urethra or bladder neck to 28F-40F through a soft expansion method, thereby achieving a better long-term therapeutic effect and effectively preventing the recurrence of urethral stenosis. The effect of the balloon on the urethra wall is radial expansion, so that each part is evenly stressed, bleeding is less, and there is no obvious damage to the normal urethra; Second, for cases where the expansion time needs to be extended, the urethra is fixed by fixing the fixed balloon, which effectively prevents the disposable urethral balloon dilation catheter of the present invention from slipping, thereby improving the success rate of the operation. The present invention can expand the posterior urethra or bladder neck for 24h-72h, and has a good effect on stubborn urethral scars.

[0025] It should be noted that the above-mentioned preferred implementation modes are only used to illustrate the principles of the present invention and are not intended to limit the scope of protection of the present invention. Without departing from the principles of the present invention, those skilled in the art may adjust the above-mentioned settings so that the present invention can be applicable to more specific application scenarios.

[0026] For example, in an alternative embodiment, the first horizontal passage opening 15 and the second horizontal passage opening 16 are arranged on both sides of the outer conduit 1 .

[0027] For another example, in another alternative embodiment, the first catheter seat 13 and the second catheter seat 14 are disposed on both sides of the outer catheter 1 .

[0028] For example, in another alternative embodiment, the outer catheter 1 is provided with a scale 25, so that medical staff can always understand the depth of puncture.

[0029] For another example, in another alternative embodiment, the measuring range of the scale 25 is 410 mm.

[0030] For example, in another alternative embodiment, the first end 7, the second connecting valve 21, and the third connecting valve 24 are all provided with a detachable dust cover 26. This is convenient for ensuring the cleanliness of the injection port, preventing dust from entering, being safe and environmentally friendly, and having a simple structure.

[0031] For another example, in another alternative embodiment, the fixed balloon 17 is spherical after being filled, and the highly expandable balloon 18 is cylindrical after being filled.

[0032] For example, in another alternative embodiment, the disposable urethral balloon dilatation catheter is made of a polymer material such as silicone rubber, latex, resin, etc. The dilatation process is painless and does not damage the anterior urethra, especially the urethral opening.

[0033] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A disposable urethral balloon dilatation catheter, characterized in that: The disposable urethral balloon dilatation catheter comprises an outer catheter, wherein a first horizontal passage, a third horizontal passage with a built-in support guide wire, and a second horizontal passage are sequentially arranged inside the outer catheter from bottom to top, the outer catheter comprises a first end and a second end, the first end is a guide portion, the first end is provided with a through hole, the through hole is connected with the third horizontal passage, the second end is fixedly provided with a first connecting valve, the first connecting valve comprises a third end and a fourth end, the third end is connected with the fourth end, the third end is connected to the third horizontal passage with a built-in support guide wire, the fourth end is connected to a urine drainage bag, the urine drainage bag is connected with the third horizontal passage through the first connecting valve, and moves away from In the direction of the first connecting valve, the outer catheter is sequentially provided with a first catheter seat fixedly connected to the outer catheter, a second catheter seat, a first horizontal passage opening, a second horizontal passage opening, a fixed balloon sealed and installed in the first horizontal passage opening, and a highly expandable balloon sealed and installed in the second horizontal passage opening; the first catheter seat includes a fifth end and a sixth end, the fifth end is fixedly connected with a second connecting valve, the sixth end is connected with the fixed balloon through the first horizontal passage, the second catheter seat includes a seventh end and an eighth end, the seventh end is fixedly connected with a third connecting valve, and the eighth end is connected with the highly expandable balloon through the second horizontal passage; A mucosal anesthetic is injected through the urethra, and the guide part of the disposable urethral balloon dilatation catheter is inserted from the external urethral orifice. Under ultrasound guidance, a highly inflatable balloon is placed at the urethral stricture segment or bladder neck obstruction. Then a high-pressure syringe is connected to the third connecting valve, and the highly inflatable balloon is filled with the high-pressure syringe, and the urethral scar is torn using the highly inflatable balloon. For posterior urethral stricture or bladder neck obstruction that requires continuous expansion, the balloon can be further filled and fixed in the bladder to prevent the disposable urethral balloon dilatation catheter from slipping, and a urine drainage bag connected to the fourth end can be used to help the patient urinate during the operation.

2. The disposable urethral balloon dilatation catheter according to claim 1, characterized in that: The first horizontal passage opening and the second horizontal passage opening are disposed on both sides of the outer duct.

3. The disposable urethral balloon dilatation catheter according to claim 2, characterized in that: The first catheter seat and the second catheter seat are arranged on both sides of the outer catheter.

4. The disposable urethral balloon dilatation catheter according to claim 3, characterized in that: The outer catheter is provided with a scale.

5. The disposable urethral balloon dilatation catheter according to claim 4, characterized in that: The measuring range of the scale is 410 mm.

6. The disposable urethral balloon dilatation catheter according to claim 5, characterized in that: The first end, the second connecting valve and the third connecting valve are all provided with detachable dust covers.

7. The disposable urethral balloon dilatation catheter according to claim 6, characterized in that: The fixed balloon is spherical after being filled, and the highly expandable balloon is cylindrical after being filled.

8. The disposable urethral balloon dilatation catheter according to claim 7, characterized in that: The disposable urethral balloon dilatation catheter is made of a polymer material such as silicone rubber, latex, and resin.

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