Easily-ruptured membrane type total urethral lubrication catheter and tube drawing lubrication method thereof

Abstract

The invention discloses an easily-ruptured membrane type total urethral lubrication catheter and a catheter drawing and lubricating method thereof, and relates to the technical field of medical catheterization instruments.The easily-ruptured membrane type total urethral lubrication catheter comprises a catheter body, and a main drainage cavity, an air bag cavity, an air bag and a lubrication channel which are independent of one another and not communicated with one another are arranged in the catheter body; the main drainage cavity, the air bag cavity and the lubricating channel which are mutually independent are arranged in the catheter, the easily-broken membrane is arranged at the front end of the lubricating channel, the small circumferential lubricating holes are formed in the catheter wall, lubricating liquid is injected before catheter drawing to break the easily-broken membrane, residual urine is automatically discharged, liquid injection continues, the lubricating liquid is sprayed out from the small holes in the side wall, and 360-degree even lubrication of the whole urethra is achieved; the device integrates residual urine emptying and extubation lubricating functions, is visual in operation, safe and controllable, can be suitable for all people to use, and remarkably reduces extubation pain, urethra injury and infection risks, and the structure and the method of the device can be widely applied to long-term indwelling and extubation scenes such as a double-J tube and a trachea cannula.

Description

A perforated membrane-type full urethral lubricated catheter and its removal lubrication method Technical Field

[0001] This invention relates to the field of medical catheterization technology, specifically to a perforated membrane type full urethral lubrication catheter and its removal lubrication method. Background Technology

[0002] Currently, routinely used urinary catheters in clinical practice generally suffer from the following defects during indwelling and removal: 1. The removal process lacks active lubrication, relying solely on the surface coating of the catheter for lubrication, resulting in poor lubrication and easily causing urethral mucosal friction, tearing, bleeding, and severe pain; 2. It cannot achieve uniform lubrication along the entire length and circumference of the urethra, resulting in a limited lubrication area and low removal comfort; 3. It cannot actively and accurately empty residual urine from the lowest part of the bladder before removal, easily leading to urinary retention and an increased risk of infection; 4. There is no clear operational feedback during lubrication fluid injection, and the injection volume and pressure are uncontrollable, allowing a large amount of lubricating fluid to enter the bladder instead of effectively acting on the urethra; 5. Existing lubrication structures mostly use air pressurization or single-hole dispensing, posing a risk of air embolism or uneven lubrication, resulting in insufficient safety and practicality. Summary of the Invention

[0003] The purpose of this invention is to provide a perforated membrane type full urethral lubrication catheter and its removal lubrication method. Before removal, the perforated membrane at the front end is ruptured by hydraulic pressure to drain residual urine from the lowest part of the bladder. Then, the entire urethra is uniformly lubricated 360° through lubrication holes in the catheter wall. This achieves integrated operation of residual urine emptying and removal lubrication, significantly reducing removal pain, urethral injury, and infection risk, and solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a ruptureable membrane type urethral lubricating catheter and its removal lubrication method, comprising a catheter body, wherein the catheter body has an independent and non-communicating main drainage cavity, a balloon cavity, a balloon, and a lubrication channel; the front end of the lubrication channel is sealed with a ruptureable membrane, and the wall of the lubrication channel has a plurality of lubrication holes distributed along the length of the catheter; the ruptureable membrane can rupture under the hydraulic pressure of the lubricating fluid, allowing residual urine in the bladder to enter the lubrication channel through the rupture and be discharged from the body, and continued injection of lubricating fluid can achieve urethral lubrication through the lubrication holes.

[0005] Optionally, the rupture membrane is located at the lowest point at the foremost end of the lubrication channel, corresponding to the lowest position of the bladder, to facilitate the complete expulsion of residual urine. The rupture membrane has a circular weak area and a cross-shaped pre-marked area, and after rupture, it forms a stable opening with a diameter of 2.0 to 3.0 mm.

[0006] Optionally, the lubrication orifices are arranged in a ring around the circumference of the catheter to form multiple fluid outlet holes, achieving 360° lubrication of the urethral wall. The total flow cross-sectional area of ​​the lubrication orifices is larger than the opening area after the fragile membrane ruptures, so that the lubricating fluid flows out preferentially from the lubrication orifices and very little enters the bladder.

[0007] Optionally, the lubrication channel is an independent straight cavity or annular cavity, which is completely isolated from the main drainage cavity and the air bladder cavity and has no communication. The rear end of the lubrication channel is provided with an independent interface for connecting a syringe, and the membrane is broken and lubricated by the hydraulic pressure of injecting lubricating fluid.

[0008] Optionally, a main drainage side hole is opened on the side wall of the main drainage cavity for normal urine drainage. It does not interfere with the lubrication channel. The discharge of residual urine and the injection of lubricating fluid share the lubrication channel. The process is completed step by step in the order of first draining residual urine and then injecting lubricating fluid, without mixing or backflow.

[0009] Optionally, before and after the fragile membrane ruptures, there is a significant change in the syringe injection resistance, and the operator can directly sense the completion of membrane rupture by touch.

[0010] Optionally, the catheter is divided into adult, pediatric, and elderly types according to the user group, and into male and female types according to gender. The differences between the models are only in the catheter diameter, length, lubrication hole distribution density, catheter hardness, and rupture pressure of the easily broken membrane.

[0011] Optionally, the pediatric catheter has a diameter of 6-10 Fr and a shorter length, with lubrication holes concentrated in the front section of the catheter, resulting in lower pressure for membrane rupture and making it suitable for the delicate and sensitive urethral structure of children. The female catheter is shorter than the male catheter, with a higher density of lubrication holes in the front section, making it suitable for the short and straight urethral structure of women. The male catheter is longer, with lubrication holes evenly distributed along the entire length of the catheter, making it suitable for the long urethra and physiological curvature of men. The elderly male catheter has a denser distribution of lubrication holes in the middle section corresponding to the prostate, and the catheter has moderate rigidity, making it suitable for the urethral stricture structure caused by benign prostatic hyperplasia. The elderly female catheter is made of a softer material, with denser lubrication holes in the front section and the membrane rupture point located further forward, making it suitable for the physiological characteristics of elderly women with urethral atrophy, laxity, and increased residual urine.

[0012] Optionally, the structure of the lubrication channel, the easily ruptured membrane, and the lubrication orifice can also be applied to the lubrication of long-term indwelling catheters such as ureteral double-J stents and endotracheal tubes, as well as any of the aforementioned urinary catheters and the matching medical lubricant syringe; the syringe and the independent interface of the lubrication channel are detachably connected, and the membrane rupture, residual urine discharge, and lubrication of the entire urethra are achieved in one operation through liquid pressure.

[0013] Optionally, the procedure includes the following steps: S1: Connect a syringe filled with medical lubricant to the lubrication channel interface of the urinary catheter; S2: Slowly push the syringe, using the hydraulic pressure of the lubricant to rupture the fragile membrane at the front end of the lubrication channel. The operator senses the rupture status of the fragile membrane through the sudden change in syringe thrust resistance; S3: Using bladder pressure and gravity, residual urine in the bladder enters the lubrication channel through the ruptured membrane and is discharged outwards. During the discharge of residual urine, the syringe plunger can be passively retracted to accommodate changes in fluid volume, without obstructing the drainage of residual urine; S4: After the residual urine has been completely discharged, continue to push the lubricant to lubricate the catheter. The lubricating fluid is preferentially ejected from the lubrication holes on the side wall of the catheter, achieving 360° uniform lubrication of the entire urethra. The lubricating fluid is ejected outward through the circumferentially distributed holes, without entering the bladder in large quantities. S5: After lubrication is completed, the urinary catheter is painlessly removed. The operation method of first rupturing the membrane to drain the fluid and then injecting lubricating fluid is also applicable to the removal of ureteral double-J stents, endotracheal tubes, and other long-term catheter removal lubrication operations. Compared with the existing technology, the beneficial effects of the present invention are as follows: 1. The present invention effectively reduces the risk of infection and eliminates air embolism by automatically emptying the bladder of residual urine before removal and pressurizing the liquid throughout the process without air injection.

[0014] Second, this invention forms multiple rings of fluid outlet holes by circumferentially arranging lubrication holes along the circumference of the catheter, achieving 360° full circumferential wall lubrication of the entire urethra, greatly reducing catheter removal pain and minimizing urethral mucosal damage.

[0015] Third, the present invention, through the circular weak area and cross-shaped pre-marking of the fragile membrane, makes the resistance of the fragile membrane change significantly, the feel clear and controllable, the lubricant sidewall outflow efficiency high, and the three independent chambers do not affect normal drainage.

[0016] Fourth, this invention, through differentiated settings in catheter diameter, length, lubrication hole distribution density, catheter hardness, and rupture pressure of easily broken membrane, is suitable for all people, including men, women, and children. The structural method can be extended to double-J tubes, endotracheal intubation, and other tube insertion and removal procedures, with a wide range of applications and broad prospects. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall longitudinal section structure of the catheter of the present invention; Figure 2 is a schematic diagram of the cross-sectional structure of the catheter of the present invention; Figure 3 is a partial enlarged view of the front end of the catheter of the present invention; Figure 4 is a schematic diagram of the circumferential distribution of the lubrication holes of the present invention; Figure 5 is a working state diagram of the present invention before membrane rupture; Figure 6 is a working state diagram of the present invention after membrane rupture; In the figures: 1, main drainage cavity; 2, balloon cavity; 3, lubrication channel; 4, balloon; 5, main drainage side hole; 6, easily ruptured membrane; 61, weak area; 62, cross pre-mark; 7, lubrication hole. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1 to 6. This invention provides an easily ruptured membrane-type urethral lubricating catheter and its removal lubrication method. It includes a catheter body with an independent, non-communicating main drainage cavity 1, a balloon cavity 2, a balloon 4, and a lubrication channel 3. The lubrication channel 3 is an independent straight or annular cavity, completely isolated from the main drainage cavity 1 and the balloon cavity 2. The rear end of the lubrication channel 3 has an independent interface for connecting a syringe. The membrane ruptures and lubricates through the hydraulic pressure of the injected lubricating fluid. An easily ruptured membrane 6 is sealed at the front end of the lubrication channel 3. Several lubrication holes 7 are distributed along the length of the catheter wall, forming multiple rings of fluid outlet holes to achieve 360° circumferential lubrication of the urethra. The total flow cross-sectional area of ​​the lubrication holes 7 is larger than the opening area of ​​the easily ruptured membrane 6, allowing the lubricating fluid to flow out preferentially from the lubrication holes 7, with very little entering the bladder. The easily ruptured membrane 6 can rupture under the hydraulic pressure of the lubricating fluid, allowing residual urine in the bladder to enter the lubricating channel through the rupture opening. After the fluid is drained from the body through the slid channel 3, lubricating fluid can be continued to be injected through the lubrication orifice 7 to achieve lubrication of the entire urethra. Connect the syringe containing medical lubricating fluid to the lubrication channel 3 interface of the catheter, and slowly push the syringe. The lubricating fluid hydraulically ruptures the fragile membrane 6 at the front end of the lubrication channel 3. The operator senses the rupture state of the fragile membrane 6 by the sudden change in the resistance of the syringe. Using the pressure inside the bladder and gravity, the residual urine in the bladder enters the lubrication channel 3 through the membrane rupture and is drained from the body. During the drainage of residual urine, the syringe core can be passively retracted to accommodate the change in liquid volume and not obstruct the drainage of residual urine. After the residual urine is drained, continue to push the lubricating fluid, so that the lubricating fluid is preferentially sprayed out from the lubrication orifice 7 on the side wall of the catheter to achieve 360° uniform lubrication of the entire urethra. The lubricating fluid is sprayed outward through the circumferentially distributed orifices, without entering the bladder in large quantities. After lubrication is completed, the catheter is painlessly removed. The operation method of rupturing the membrane to drain the fluid first and then injecting lubricating fluid is also applicable to the lubrication operation of removing ureteral double-J stents, endotracheal tubes, and other long-term catheters.

[0020] More specifically, in this embodiment: when removing the tube, first depressurize the balloon 4, connect the syringe containing medical lubricant to the lubrication channel 3 interface, and slowly inject. When the hydraulic pressure reaches the set value, the easy-rupture membrane 6 ruptures, and the operator can clearly feel the decrease in resistance. The residual urine in the bladder enters the lubrication channel 3 through the rupture under the action of gravity and internal pressure and is discharged from the body. After the residual urine is discharged, continue to inject the lubricant. The lubricant is evenly sprayed out from the circumferential lubrication holes 7 to achieve 360° lubrication of the entire urethra. After lubrication is completed, the tube is smoothly removed, significantly reducing pain and damage.

[0021] It is worth noting that the lubricant is sprayed outward through circumferentially distributed small holes, without entering the bladder in large quantities. Furthermore, the lubrication channel 3 structure and tube removal lubrication method of the present invention can also be applied to the tube removal lubrication of long-term indwelling catheters such as double-J tubes and endotracheal tubes according to the same principle, so as to reduce tube removal resistance and reduce mucosal damage.

[0022] Example 2, based on the above examples: Referring to Figures 1 to 6, the components include: a main drainage side hole 5 is opened on the side wall of the main drainage cavity 1 for normal urine drainage, which does not interfere with the lubrication channel 3. The residual urine discharge and lubricant injection share the lubrication channel 3, and are completed step by step in the order of draining residual urine first and then injecting lubricant, without mixing or backflow. The easily ruptured membrane 6 is set at the lowest point of the front end of the lubrication channel 3, corresponding to the lowest position of the bladder, which facilitates the complete discharge of residual urine. The easily ruptured membrane 6 has a circular weak area 61 and a cross pre-marked notch 62. After rupture, it forms a stable opening with a diameter of 2.0 to 3.0 mm. Before and after the easily ruptured membrane 6, there is a significant change in the syringe injection resistance, and the operator can directly feel the completion of the membrane rupture by touch.

[0023] More specifically, in this embodiment: a syringe filled with medical lubricant is connected to the independent interface of the catheter lubrication channel 3. The syringe is slowly pushed in, and the operator senses the rupture state of the fragile membrane 6 by the sudden change in the resistance of the syringe. The fragile membrane 6 at the front end of the lubrication channel 3 is ruptured by the hydraulic pressure of the lubricant. The residual urine in the bladder is allowed to enter the lubrication channel 3 through the rupture opening and be discharged out of the body by the pressure inside the bladder and gravity.

[0024] It is worth noting that during normal indwelling catheterization, the main drainage chamber 1 drains urine, the balloon chamber 2 is filled with water and fixed, and the easily ruptured membrane 6 at the front end of the lubrication channel 3 remains closed. The three chambers do not interfere with each other. During the discharge of residual urine, the syringe core can be passively retracted to accommodate changes in liquid volume and does not obstruct the drainage of residual urine.

[0025] Example 3, based on the above examples: Please refer to Figures 1 to 6. The components include: urinary catheters are divided into adult type, pediatric type and elderly type according to the user group, and into male type and female type according to gender. The only differences between the models are in the catheter diameter, length, distribution density of lubrication holes, catheter hardness, and rupture pressure of the easily ruptured membrane.

[0026] Pediatric catheters have a diameter of 6-10 Fr and are shorter in length. The lubrication holes are concentrated in the front section of the catheter, and the rupture pressure is lower, making them suitable for the delicate and sensitive urethral structure of children. Female catheters are shorter than male catheters, and the lubrication holes are more densely distributed in the front section, making them suitable for the short and straight urethral structure of women. Male catheters are longer, and the lubrication holes are evenly distributed along the entire length of the catheter, making them suitable for the long urethra and physiological curvature of men. Elderly male catheters have a denser distribution of lubrication holes in the middle section corresponding to the prostate, and the catheter has moderate rigidity, making them suitable for urethral strictures caused by benign prostatic hyperplasia. Elderly female catheters are made of softer material, with denser lubrication holes in the front section and the rupture point 6 located further forward, making them suitable for the physiological characteristics of elderly women with urethral atrophy, laxity, and increased residual urine.

[0027] The structure of the lubrication channel 3, the easily ruptured membrane 6, and the lubrication orifice 7 can also be applied to the lubrication of long-term indwelling catheters such as ureteral double-J stents and endotracheal tubes, any urinary catheter, and the matching medical lubricant syringe; the syringe and the independent interface of the lubrication channel 3 can be detachably connected, and the membrane rupture, residual urine discharge and whole urethral lubrication can be achieved in one operation through liquid pressure.

[0028] More specifically, in this embodiment, the urinary catheter is divided into adult type, pediatric type, elderly type, male type, and female type. Each model is differentiated in terms of catheter diameter, length, lubrication hole distribution density, catheter hardness, and rupture pressure of the easily ruptured membrane, thereby improving the applicability of the device.

[0029] It is worth noting that this urinary catheter can be divided into adult male and female types, pediatric male and female types, and elderly male and female types according to the population. By adjusting the tube diameter, length, lubrication hole density, hardness, and membrane rupture pressure, it can be adapted to different physiological structures. Furthermore, the full urethral lubrication structure and tube removal lubrication method disclosed in this invention are not only applicable to urinary catheters, but can also be extended to other long-term catheter removal scenarios such as double-J tube removal for ureteral stricture treatment and endotracheal intubation removal, and have broad clinical applicability.

[0030] Working principle: When using this easily ruptured membrane type 6 full urethral lubrication catheter and its removal lubrication method, connect a syringe filled with medical lubricant to the independent interface of the catheter lubrication channel 3, slowly push the syringe, and use the hydraulic pressure of the lubricant to rupture the easily ruptured membrane 6 at the front end of the lubrication channel 3. Using the pressure inside the bladder and gravity, the residual urine in the bladder enters the lubrication channel 3 through the rupture and is discharged out of the body. After the residual urine is discharged, continue to push the lubricant, so that the lubricant is preferentially sprayed out from the lubrication holes 7 on the side wall of the catheter, achieving 360° uniform lubrication of the entire urethra. After lubrication is completed, the catheter is smoothly and painlessly removed.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A perforated membrane-type full urethral lubricated catheter and its removal lubrication method, comprising a catheter body, characterized in that: The catheter body is provided with an independent and non-communicating main drainage cavity (1), a balloon cavity (2), a balloon (4), and a lubrication channel (3); the front end of the lubrication channel (3) is sealed with a ruptured membrane (6), and the wall of the lubrication channel (3) is provided with a number of lubrication holes (7) distributed along the length of the catheter; the ruptured membrane (6) can be ruptured under the hydraulic pressure of the lubricating fluid, so that residual urine in the bladder enters the lubrication channel (3) through the rupture and is discharged from the body, and the lubricating fluid can be continuously injected through the lubrication holes (7) to achieve lubrication of the entire urethra.

2. The easily ruptured membrane type full urethral lubricated catheter and its removal lubrication method according to claim 1, characterized in that: The rupture membrane (6) is located at the lowest point at the front end of the lubrication channel (3), corresponding to the lowest position of the bladder, which facilitates the complete discharge of residual urine. The rupture membrane (6) has a circular weak area (61) and a cross-shaped pre-mark (62), which forms a stable opening with a diameter of 2.0 to 3.0 mm after rupture.

3. The easily ruptured membrane type full urethral lubricated catheter and its removal lubrication method according to claim 1, characterized in that: The lubrication orifices (7) are arranged in a ring around the circumference of the catheter to form multiple fluid outlet holes, achieving 360° full circumferential wall lubrication of the urethra. The total flow cross-sectional area of ​​the lubrication orifices (7) is greater than the opening area after the fragile membrane (6) is ruptured, so that the lubricating fluid flows out preferentially from the lubrication orifices (7) and very little enters the bladder.

4. The easily ruptured membrane type full urethral lubricated catheter and its removal lubrication method according to claim 1, characterized in that: The lubrication channel (3) is an independent straight cavity or annular cavity, which is completely isolated from the main drainage cavity (1) and the air bladder cavity (2). The rear end of the lubrication channel (3) is provided with an independent interface for connecting a syringe, which realizes membrane breaking and lubrication by injecting lubricating fluid.

5. The easily ruptured membrane type full urethral lubricated catheter and its removal lubrication method according to claim 1, characterized in that: The main drainage cavity (1) has a main drainage side hole (5) on its side wall for normal urine drainage. It does not interfere with the lubrication channel (3). The discharge of residual urine and the injection of lubricating fluid share the lubrication channel (3). The process is completed step by step in the order of first draining residual urine and then injecting lubricating fluid, without mixing or backflow.

6. The easily ruptured membrane type full urethral lubricated catheter and its removal lubrication method according to claim 1, characterized in that: Before and after the fragile membrane (6) ruptures, there is a significant change in the syringe injection resistance, and the operator can directly sense the completion of the membrane rupture by touch.

7. The easily ruptured membrane type full urethral lubricated catheter and its removal lubrication method according to claim 1, characterized in that: The catheters are classified into adult, pediatric, and elderly types according to the user population, and into male and female types according to gender. The only differences between the models are in the catheter diameter, length, lubrication hole distribution density, catheter hardness, and rupture pressure of the easily ruptured membrane (6).

8. The easily ruptured membrane type full urethral lubricated catheter and its removal lubrication method according to claim 7, characterized in that: The pediatric catheter has a diameter of 6-10 Fr and is shorter in length. The lubrication holes are concentrated in the front section of the catheter, making the membrane rupture (6) less likely to break, which is suitable for the delicate and sensitive urethral structure of children. The female catheter is shorter than the male catheter, and the lubrication holes are more densely distributed in the front section of the catheter, which is suitable for the short and straight urethral structure of women. The male catheter is longer, and the lubrication holes are evenly distributed along the entire length of the catheter, which is suitable for the long urethra and physiological curvature of men. The elderly male catheter has a denser distribution of lubrication holes in the middle section corresponding to the prostate, and the catheter has moderate hardness, which is suitable for the urethral stricture structure caused by benign prostatic hyperplasia. The elderly female catheter is made of softer material, with denser lubrication holes in the front section, and the membrane rupture (6) is located further forward, which is suitable for the physiological characteristics of urethral atrophy, relaxation and increased residual urine in elderly women.

9. The easily ruptured membrane type full urethral lubricated catheter and its removal lubrication method according to claim 1, characterized in that: The structure of the lubrication channel (3), the easily ruptured membrane (6) and the lubrication hole (7) can also be applied to the lubrication of long-term indwelling catheters such as ureteral double J tubes and endotracheal tubes, any of the aforementioned catheters, and the matching medical lubricating syringe; the syringe and the independent interface of the lubrication channel (3) can be detachably connected, and the membrane rupture, residual urine discharge and whole urethral lubrication are integrated through liquid pressure.

10. The easily ruptured membrane type full urethral lubricated catheter and its removal lubrication method according to claim 1, characterized in that: Includes the following steps: S1: Connect the syringe filled with medical lubricant to the lubrication channel (3) interface of the urinary catheter; S2: Slowly push the syringe to use the hydraulic pressure of the lubricant to rupture the fragile membrane (6) at the front end of the lubrication channel (3). The operator can sense the rupture state of the fragile membrane (6) by the sudden change in the resistance of the syringe; S3: Use the pressure inside the bladder and gravity to allow the residual urine in the bladder to enter the lubrication channel (3) through the membrane rupture and be discharged out of the body. During the discharge of residual urine, the syringe core can be passively retracted to accommodate the change in liquid volume and not obstruct the drainage of residual urine; S4: After the residual urine is drained, continue to inject the lubricating fluid so that the lubricating fluid is preferentially sprayed out from the lubrication holes (7) on the side wall of the catheter, so as to achieve uniform lubrication of the entire urethra in 360°. The lubricating fluid is sprayed outward through the circumferentially distributed holes and does not enter the bladder in large quantities. S5: After lubrication, the urinary catheter is painlessly removed. The procedure of first rupturing the membrane to drain the fluid and then injecting lubricant is also applicable to the removal of ureteral double-J tubes, endotracheal tubes, and other long-term catheter removal and lubrication procedures.

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