Visual urethral stenosis scar dilation catheter sheath

Abstract

The invention belongs to the technical field of medical instruments, and particularly discloses a visual urethral stenosis scar dilation catheter sheath which is provided with a through hole penetrating through the extension direction of the catheter sheath. The catheter sheath comprises a sheath head section, an expansion section and a sheath tail section which are connected in sequence; an imaging element and a lighting element are arranged in the sheath head section, and a power supply and a controller are arranged in the sheath tail section; the controller, the imaging element and the lighting element are electrically connected to the power supply; and the imaging element, the lighting element and the external display are all in communication connection with the controller. The visual urethral stenosis scar dilation catheter sheath can improve the dilation success rate to the maximum extent, avoids formation of a false channel, reduces operative complications, is wider in applicable personnel range, and enables operation to be simple and convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a visual urethral stricture scar dilatation catheter sheath. Background Art

[0002] Urethral stricture is a common disease of the urinary system, more common in men. Clinically, congenital urethral strictures such as congenital urethral external orifice stenosis, urethral valves, hypertrophy of the seminal vesicles, congenital urethral lumen stenosis, etc. are common. Inflammatory urethral strictures are often caused by urethral lumen infection and injury, and traumatic urethral strictures are mostly caused by improper treatment of the injury in the early stage. Due to abnormal proliferation during inflammation or tissue repair, fibrotic tissue, i.e. urethral scar, will form on the urethral wall. If the urethral scar is mild and does not affect the patient's urination or the impact is small, there is no need for hospitalization and it can be treated by regular urethral dilation. The main method is to use a urethral probe to gradually dilate the scar from thin to thick to prevent urethral stricture. Because the scar is mainly fibrous connective tissue and is not elastic, it may obstruct the urethra and cause urethral stricture. Urethral dilation is the most common and simplest treatment method.

[0003] At present, urethral stricture scar dilation is generally performed blindly with a metal urethral probe, which requires a lot of clinical experience to complete. It is even more difficult for young medical staff to master blind dilation, and they often encounter blind dilation into a false passage, thus causing serious clinical complications related to this. Even for those with rich clinical experience, there are still many cases where blind scar dilation is not possible when encountering patients with severe strictures.

[0004] In order to solve the problem that the blind dilation method using a metal urethral probe in the prior art relies on the experience of medical personnel and is easy to dilate into a false passage, it is necessary to improve the structure of the scar dilation device to solve the current technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a visual urethral stricture scar dilatation catheter sheath. The use of the visual urethral stricture scar dilatation catheter sheath can maximize the dilatation success rate, avoid false passage formation, reduce surgical complications, be applicable to a wider range of people, and make the operation simple and convenient.

[0006] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a visual urethral stricture scar dilatation catheter sheath, the catheter sheath is formed with a through hole running through its extension direction; the catheter sheath includes a sheath head section, an dilation section and a sheath tail section connected in sequence; the sheath head section has an imaging element and a lighting element built in, and the sheath tail section has a power supply and a controller built in; the controller, imaging element and lighting element are all electrically connected to the power supply; the imaging element, lighting element and an external display are all communicatively connected to the controller.

[0007] In order to better implement the present invention, the cross sections of the sheath head section, the expansion section and the sheath tail section are all circular.

[0008] In order to better implement the present invention, the sheath head section is formed as a smooth arc section.

[0009] In order to better implement the present invention, the sheath head section has a taper, and its size gradually decreases in a direction away from the expansion section.

[0010] In order to better implement the present invention, the end of the sheath head section is transparent, and the imaging element and the lighting element are built into the transparent structure.

[0011] In order to better implement the present invention, the end surface of the sheath head section is formed into a spherical surface.

[0012] In order to better implement the present invention, the surfaces of the sheath head section and the expansion section are coated with a hydrophilic lubricating coating.

[0013] In order to better realize the present invention, the imaging element adopts a nano-level high-definition electronic endoscope lens.

[0014] In order to better implement the present invention, the lighting element adopts an LED cold light source.

[0015] In order to better implement the present invention, the sheath tail section is built with a wireless signal transmission module, and the wireless signal transmission module is communicatively connected to the processor and an external display respectively.

[0016] Beneficial effects:

[0017] The present invention utilizes the visible urethral stricture scar to expand the catheter sheath, which can maximize the expansion success rate, avoid the formation of false passages, reduce surgical complications, and is applicable to a wider range of personnel, making the operation simple and convenient. After the imaging element and the lighting element are started by the controller, the sheath head section is first slowly inserted into the patient's urethra. Under the illumination of the lighting element, the imaging element converts the real-time image in the patient's urethra into an electrical signal and sends it to an external display. After being processed and restored, the display is displayed. Medical personnel observe the internal conditions of the patient's urethra through the restored video image to perform more accurate treatment; in the process of advancing the catheter sheath forward, in order to ensure clearer imaging, water can be injected from the through hole to flush the urethra; when the sheath head section and the expansion section of the catheter sheath gradually pass through the scar position, because the urethra is narrow at the scar, and the diameter of the expansion section is larger than the caliber of the scar urethra, the expansion section expands the scar.

[0018] The present invention can ensure that the imaging element and the lighting element can accurately present the situation inside the urethra by setting the end of the sheath head section as a transparent structure, while avoiding damage to the imaging element and the lighting element. The sheath head section with a spherical surface can effectively prevent the urethra from being scratched, and the sheath head section with a taper can gradually expand the urethral stenosis, which can also protect the urethra and avoid opening it too quickly and causing secondary damage; the smooth transition connection between the sheath head section and the expansion section effectively avoids the risk of damage to the inner wall of the urethra.

[0019] The present invention provides a hydrophilic lubricating coating, which quickly combines with water when it meets water to form a hydration layer, making the surface very lubricated, greatly reducing the friction between the catheter sheath and human tissue, while greatly improving the convenience of operation for doctors and the comfort of patients, reducing the damage of the catheter sheath to the soft tissue of the inner wall of the urethra, reducing adhesion or eliminating thrombosis during the use of the catheter sheath, and avoiding possible complications such as friction damage and infection. Secondly, since the sheath head section is made of transparent material, this transparent material will fog during use in the human body, thus affecting effective observation, while the use of a hydrophilic coating can make the droplets in the environment spread evenly on the surface of the lens, forming a uniform hydrogel layer like a lens.

[0020] The imaging component of the present invention adopts a nano-level high-definition electronic endoscope lens, which has the characteristics of small size, clear imaging and easy installation, and can effectively improve the convenience and accuracy of the treatment of urethral stricture scar dilatation; at the same time, the medical LED cold light source can provide a clearer lighting effect, which helps doctors to observe and operate accurately. Moreover, the LED light source generates less heat when working and will not cause overheating to the surrounding environment, which is suitable for use in medical environments that require precise temperature control. The most important thing is that the spectral purity of the medical LED cold light source is high, which can provide light that is closer to natural light, helping doctors to observe the lesion more accurately.

[0021] The present invention receives the signal sent by the imaging element through the wireless signal transmission module and transmits it to an external display for image display, thereby reducing the number of wiring connections, facilitating the operation of medical personnel, and improving the convenience of using the catheter sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the overall structure of the catheter sheath of the present invention (the dotted line represents the internal structure);

[0023] Figure 2 It is a schematic diagram of the sheath head section structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the sheath tail section structure of the present invention.

[0025] In the figure: 1. sheath head section; 2. expansion section; 3. sheath tail section; 4. through hole; 5. imaging element; 6. lighting element; 7. power supply; 8. controller; 9. wireless signal transmission module. DETAILED DESCRIPTION

[0026] Example

[0027] like Figure 1-Figure 3 As shown, a visual urethral stricture scar dilatation catheter sheath is formed on the catheter sheath with a through hole 4 running through its extension direction, and the through hole 4 is preferably a circular channel with a diameter of F4; the catheter sheath includes a sheath head section 1, an expansion section 2 and a sheath tail section 3 connected in sequence, and the sheath head section 1, the expansion section 2 and the sheath tail section 3 are distinguished by dotted lines in the accompanying drawings, and the expansion section 2 is not fully illustrated. During production, the sheath head section 1, the expansion section 2 and the sheath tail section 3 are integrally formed, and the catheter sheath can be made into different models with different cross-sectional diameters to adapt to different patients of different age groups at different treatment stages. The sheath head section 1 is built-in with an imaging element 5 and a lighting element 6, and the sheath tail section 3 is built-in with a power supply 7 and a controller 8. The power supply 7 can be designed as a built-in battery or a wiring power supply structure according to actual needs; the controller 8, the imaging element 5 and the lighting element 6 are all electrically connected to the power supply 7; the imaging element 5, the lighting element 6 and the external display are all communicatively connected to the controller 8. The power supply 7, controller 8, imaging element 5, lighting element 6 and the communication connection methods between them are not shown in detail in the drawings, and those skilled in the art can select conventional components for use according to needs.

[0028] The specific working principle of the present invention is summarized as follows:

[0029] First, after starting the imaging element 5 and the lighting element 6 through the controller 8, the sheath head section 1 is slowly inserted into the patient's urethra. The lighting element 6 will illuminate the urethra, provide a clear and visible field of view for the imaging element 8, and clearly present the situation inside the urethra in front of the imaging element 5. The imaging element 5 captures the real-time image inside the urethra and converts it into an electrical signal and transmits it to an external display. The external display displays the situation inside the urethra after the signal is converted by the signal processor. The medical staff observes the internal situation of the patient's urethra and the position of the catheter sheath through the video image displayed on the display, so as to accurately find the location of urethral stenosis and perform more precise treatment. During the process of the catheter sheath being pushed forward, due to the urethra It is inevitable that there will be residual dirt inside, which may adhere to the end of the sheath head section, blocking the field of view of the camera element 5 and affecting the observation of medical staff. Therefore, in order to ensure clearer imaging, a through hole is set, and water can be injected from the through hole 4 to flush the urethra and keep the urethra clean. The connection method of the water injection pipe is not fully shown in the accompanying drawings. In actual use, technicians in this field can use conventional technical means to set a connecting valve at the entrance of the through hole 4 in the sheath tail section 3 as needed, connect an external water source for flushing, and prevent the liquid in the urethra from flowing out in reverse; of course, the through hole 4 can also be used as a channel for drainage, drug injection, guide wire insertion and other operations, which can be selected according to actual needs. When the catheter sheath reaches the narrow position of the scar, the expansion section 2 is guided by the sheath head section 1 to gradually pass through the scar. When passing through the scar, the urethra is narrow at the scar, and the diameter of the expansion section 2 is larger than the urethra caliber at the scar. Therefore, the expansion section 2 will expand the scar. In the actual expansion process, in order to fully ensure the safety of the patient's urethral expansion, a smaller catheter sheath can be selected for expansion first, and the size of the catheter sheath can be gradually increased to gradually expand the urethra, thereby avoiding secondary damage to the patient and achieving the best expansion effect. The present invention uses a visual urethral stricture scar to expand the catheter sheath, which can maximize the expansion success rate, avoid false passage formation, reduce surgical complications, and is applicable to a wider range of personnel, making the operation simple and convenient.

[0030] Preferably, the cross sections of the sheath head section 1, the expansion section 2 and the sheath tail section 3 are all circular. The circular cross-sectional structure conforms to the structure of the human urethra and can protect the urethra from being scratched during the expansion process.

[0031] Preferably, the sheath head section 1 is formed into a smooth arc section. Since the posterior urethra itself is curved, the sheath head section 1 is set to have a certain curvature to facilitate changing the propulsion direction, so that the catheter sheath can smoothly enter along the center line of the patient's urethra and reach the scar position.

[0032] Preferably, the sheath head section 1 has a taper, and its size gradually decreases in the direction away from the expansion section 2. As mentioned above, due to the "opening" and "pathfinding" functions of the sheath head section 1, the tapered sheath head section 1 can gradually expand the urethral stenosis, and can also protect the urethra, preventing the stenosis from expanding too quickly and causing secondary damage.

[0033] Preferably, the end of the sheath head section 1 is transparent and made of medical-grade non-toxic polymer materials, and the imaging element 5 and the lighting element 6 are built into the transparent structure. Since the sheath head section 1 plays the role of "opening the circuit" and "finding the way", the imaging element 5 and the lighting element 6 are installed inside it. By setting the end of the sheath head section 1 as a transparent structure, it can be ensured that the imaging element 5 and the lighting element 6 can accurately present the situation inside the urethra, while avoiding damage to the imaging element 5 and the lighting element 6.

[0034] Preferably, the end surface of the sheath head section 1 is formed into a spherical surface. Since the end of the sheath head section 1 is the first to contact the urethra, the end with a spherical surface can smoothly contact the urethra during the process of traveling in the urethra, which can effectively prevent the urethra from being scratched.

[0035] Preferably, the surfaces of the sheath head section 1 and the expansion section 2 are coated with a hydrophilic lubricating coating. When the catheter sheath is advanced in the urethra, the surfaces of the sheath head section 1 and the expansion section 2 are in friction contact with the inner wall of the urethra. If the surface treatment of the sheath head section 1 and the expansion section 2 is improper, the inner wall of the urethra will be damaged by friction, and further scars will be produced during repair. In this case, the urethra will become narrower and narrower, seriously affecting the expansion effect. The hydrophilic lubricating coating combines a hydrophilic polymer (such as polyacrylamide, polyvinyl pyrrolidone) with good biocompatibility to the surface of the catheter sheath through an ultrasonic spraying process and a curing process, and forms a polymer cross-linked network film, which is a hydrophilic coating. The hydrophilic coating prepared by ultrasonic spraying will not easily fall off from the surface of the catheter sheath after the curing operation, and has relatively good firmness and stability. This means that the hydrophilic coating on the surface of the catheter sheath will not fall off due to friction during normal use of the operation, resulting in increased friction of the catheter or residues remaining in the human tissue, and the safety factor is high. In addition, the coating quickly combines with water when it meets water to form a hydration layer, making the surface very lubricated, greatly reducing the friction between the catheter sheath and the inner wall of the urethra, while greatly improving the convenience of operation for doctors and the comfort of patients, reducing the damage of the catheter sheath to the soft tissue of the inner wall of the urethra, reducing adhesion or eliminating thrombosis during the use of the catheter sheath, avoiding the occurrence of possible complications such as friction damage and infection, and the advancement of the catheter sheath in the patient's urethra is smoother, which can effectively improve the treatment speed and treatment effect. Secondly, since the sheath head section 1 is a transparent material, and the human body has a certain temperature and water vapor, this transparent material will inevitably fog during the advancement of the urethra, blocking the shooting field of the imaging element 5, and even affecting the effective observation of medical staff, thereby affecting the smooth advancement of the catheter sheath in the urethra. The use of a hydrophilic coating can make the droplets in the environment spread evenly on the surface of the lens, forming a uniform hydrogel layer like a lens, which will not affect the shooting field of the imaging element 5.

[0036] Preferably, the imaging element 5 uses a nano-level high-definition electronic endoscope lens. Nowadays, an electronic endoscope is an indispensable medical device used for imaging the organs or other tissues deep inside the patient's body. The nano-level high-definition electronic endoscope lens uses an extremely small electronic imaging element - CCD (charge coupled device), which images the intracavitary object to be observed on the CCD through a tiny objective optical system, and then sends the received image signal to the image processing system through an image-guide fiber bundle. It has the characteristics of small size, clear imaging and easy installation, which can effectively improve the convenience and accuracy of the treatment of urethral stricture scar dilatation, and is very suitable for internal treatment of the human body.

[0037] Preferably, the lighting element 6 uses an LED cold light source. The brightness of a medical LED cold light source is usually higher than that of a traditional light source, and can provide a clearer lighting effect, which helps doctors to observe and operate accurately. Moreover, the LED cold light source generates less heat when working, and will not cause overheating to the surrounding environment, and is suitable for use in medical environments that require precise temperature control. Most importantly, the medical LED cold light source has a high spectral purity, which can provide light that is closer to natural light, helping doctors to observe the lesion more accurately.

[0038] Preferably, the sheath tail section 3 is built with a wireless signal transmission module 9, and the wireless signal transmission module 9 is communicatively connected to the power supply 7, the controller 8, the imaging element 5 and the external display. The wireless signal transmission module 9 and the communication connection method between it and other components are not shown in detail in the drawings, and those skilled in the art can select conventional components for use according to needs. The signal processed by the imaging element 5 is directly transmitted to the external display for screen display through the wireless signal transmission module 9, which reduces the number of wiring, facilitates the operation of medical personnel, and improves the convenience of using the catheter sheath.

[0039] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A visual urethral stricture scar dilatation catheter sheath, characterized in that: The catheter sheath is provided with a through hole (4) extending in the direction of its extension; the catheter sheath comprises a sheath head section (1), an expansion section (2) and a sheath tail section (3) which are connected in sequence; the sheath head section (1) is provided with an imaging element (5) and an illumination element (6), and the sheath tail section (3) is provided with a power supply (7) and a controller (8); the controller (8), the imaging element (5) and the illumination element (6) are all electrically connected to the power supply (7); the imaging element (5), the illumination element (6) and an external display are all communicatively connected to the controller (8).

2. The visual urethral stricture scar dilatation catheter sheath according to claim 1, characterized in that: The cross sections of the sheath head section (1), the expansion section (2) and the sheath tail section are all circular.

3. The visual urethral stricture scar dilatation catheter sheath according to claim 1, characterized in that: The sheath head section (1) is formed as a smooth arc section.

4. The visual urethral stricture scar dilatation catheter sheath according to claim 1, characterized in that: The sheath head section (1) has a taper, and its size gradually decreases in a direction away from the expansion section (2).

5. The visual urethral stricture scar dilatation catheter sheath according to claim 1, characterized in that: The end of the sheath head section (1) is transparent, and the imaging element (5) and the lighting element (6) are built into the transparent structure.

6. The visual urethral stricture scar dilatation catheter sheath according to claim 1, characterized in that: The end surface of the sheath head section (1) is formed as a spherical surface.

7. The visual urethral stricture scar dilatation catheter sheath according to claim 1, characterized in that: The surfaces of the sheath head section (1) and the expansion section (2) are both coated with a hydrophilic lubricating coating.

8. The visual urethral stricture scar dilatation catheter sheath according to claim 1, characterized in that: The imaging element (5) adopts a nano-level high-definition electronic endoscope lens.

9. The visual urethral stricture scar dilatation catheter sheath according to claim 1, characterized in that: The lighting element (6) adopts an LED cold light source.

10. The visual urethral stricture scar dilatation catheter sheath according to claim 1, characterized in that: The sheath tail section (3) is internally provided with a wireless signal transmission module (9), and the wireless signal transmission module (9) is communicatively connected to the power source (7), the controller (8), the imaging element (5) and the external display.

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