An antibacterial urinary catheterization device and a modular urinary catheterization kit using the same

Abstract

The utility model provides a kind of antibacterial urinary catheter device and a kind of modularization urinary catheter instrument package applying it, belong to catheter technical field. It solves the problem that current conventional catheter cannot cope with the patient of urinary tract stenosis. The present urinary catheter device includes guide wire and catheter with water bag cavity, the inside of catheter has guide wire channel for guide wire, guide wire channel forms open port at the head end of catheter, the head end of catheter is provided with at least one circle of developing barium strip along its circumference, developing barium strip is arranged around guide wire channel and guide wire can pass through developing barium strip inside through guide wire channel. Guide wire is used to guide catheter to slide into patient's body, so that the success rate of catheter insertion into the body of urinary tract stenosis patient can be greatly improved, and the incidence of urethral infection caused by placing catheter is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of urinary catheter technology, and relates to an antibacterial urinary catheter device, and more particularly to an antibacterial urinary catheter device and a modular urinary catheterization instrument pack using the same. Background Technology

[0002] In current clinical practice, the following technical deficiencies exist when performing catheterization in wards for complex cases of severe urethral stricture caused by benign prostatic hyperplasia, malignant tumor compression, etc.:

[0003] 1. Conventional catheterization is performed in the ward using a traditional catheter. The catheter is relatively thick and flexible. Even with the internal guidewire support, inserting the catheter and guidewire simultaneously is often difficult for patients with severe urethral stricture. Forcibly inserting the catheter can also easily lead to urethral injury.

[0004] 2. Traditional urinary catheters are almost invisible under X-rays, and are difficult to observe when inserted under X-ray.

[0005] 3. Standard catheterization kits do not come with a dedicated guidewire. The guidewire in a standard catheter is approximately the same length as the catheter itself, making it impossible to insert the catheter by first inserting the guidewire and then guiding it through the catheter. Furthermore, the guidewire in a standard catheter has a rough surface, making it unsuitable for direct insertion into the urethra.

[0006] 4. The surface of the urinary catheter has a high bacterial colonization rate, and traditional silicone materials lack antibacterial function. Utility Model Content

[0007] To address the shortcomings of existing technologies, this invention provides an antibacterial urinary catheterization device and a modular urinary catheterization kit using the same. It solves the technical problem that existing conventional urinary catheters cannot handle patients with urinary tract strictures, while simultaneously reducing the incidence of urinary tract infections caused by catheter placement.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] An antibacterial catheterization device includes a guidewire and a catheter with a water-filled bladder. The catheter has a guidewire channel on its inner side for the guidewire to pass through. The guidewire channel has an open port at the tip of the catheter. The catheter is characterized in that at least one ring of barium contrast agent is provided around the tip of the catheter in its circumference. The barium contrast agent surrounds the guidewire channel and the guidewire can pass through the guidewire channel from the inside of the barium contrast agent.

[0010] The catheter of this application has an independent guidewire channel on its inner side. The guidewire channel forms an open port at the tip of the catheter. In use, the guidewire is first inserted into the patient's body for catheterization. The small diameter of the guidewire makes it easier to move in the body of patients with urinary tract stricture. After the guidewire is in place, the catheter is slipped through the open port from the tail end of the guidewire and slid along the guidewire. The guidewire guides the catheter into the patient's body, which can greatly improve the success rate of catheter insertion into patients with urinary tract stricture.

[0011] The catheter of this application is equipped with a barium strip at its tip, which allows the tip to be clearly visualized under X-ray, enabling the operator to clearly observe the movement of the catheter tip for adjustment. This design further improves the success rate of catheter insertion into patients with urinary tract stricture.

[0012] The barium contrast strip is positioned at the tip of the catheter and wraps around the outside of the guidewire channel. This ensures that the annular barium contrast strip can be clearly captured and visualized by X-rays regardless of how the catheter is rotated or moved, without overlapping with the guidewire and causing local blurring. This design further improves the success rate of catheter insertion.

[0013] In the aforementioned antibacterial catheterization device, the diameter of the guidewire channel is 0.9±0.05mm and the inner wall of the guidewire channel has a polytetrafluoroethylene layer.

[0014] The guidewire channel of this application has a small diameter and its surface is coated with a polytetrafluoroethylene layer. The coefficient of friction of the polytetrafluoroethylene coating is less than 0.1, which allows the guidewire to pass through smoothly, thereby further improving the success rate of catheter insertion.

[0015] In the aforementioned antibacterial catheterization device, the guidewire is 1.5m long and has an outer diameter of 0.89mm. The guidewire includes a straight body section and a curved tip section, which are integrally formed. The curved tip section is J-shaped.

[0016] The guidewire in this application is 1.5 meters long, which is much longer than the length of the urinary catheter. This allows a large portion of the guidewire to remain exposed after entering the patient's body. This exposed portion facilitates catheter insertion, allowing the catheter to move along the guidewire and accurately enter the patient's body, thus significantly improving the success rate.

[0017] In the aforementioned antibacterial catheterization device, the guidewire includes a nickel-titanium alloy inner core, the outer surface of which is coated with a polyurethane coating.

[0018] The guidewire of this application is made of nickel-titanium alloy. Nickel-titanium alloy has high tensile strength and is lightweight. It has strong bending and deformation capabilities, making it very suitable for use as a traction device. The outer surface of the nickel-titanium alloy inner core is coated with a polyurethane coating, which can significantly reduce the friction between the guidewire and the inner wall of the guidewire channel, making the catheter guide movement smooth.

[0019] In the aforementioned antibacterial catheterization device, the catheter has a catheterization channel on its inner side, and several symmetrically arranged side holes, all of which communicate with the catheterization channel, are opened on the outer periphery of the catheter tip.

[0020] Symmetrically arranged side holes are provided on the outer periphery of the tip of the catheter. The side holes are used to guide urine into the catheter channel. The pairing of side holes can generate convection to avoid negative pressure and make the urine flow out more smoothly.

[0021] In the aforementioned antibacterial catheterization device, the barium contrast strip is located between the side hole and the open port.

[0022] In the aforementioned antibacterial catheterization device, the barium contrast strip has a closed ring structure with its ends connected.

[0023] In the aforementioned antibacterial urinary catheter, the catheter wall comprises, from the outside to the inside, a hydrophilic coating and a nano-silver-chitosan composite coating, wherein the silver ion loading in the nano-silver-chitosan composite coating is 0.5-1.2 μg / cm³. 2 .

[0024] The inner layer of the catheter wall in this application has a nano-silver-chitosan composite coating, which provides excellent antibacterial properties. The silver ion loading in the nano-silver-chitosan composite coating is 0.5-1.2 μg / cm³. 2 The antibacterial material is coated using a magnetron sputtering process, and the silver ion release cycle lasts for up to 7 days, which can significantly improve the antibacterial performance and duration of the catheter.

[0025] In the aforementioned antibacterial catheterization device, the inner side of the catheter has a water injection channel communicating with the water bladder cavity, and the tail end of the catheter has a water injection connector communicating with the water injection channel.

[0026] A modular urinary catheterization kit, characterized in that it includes one urinary catheter and one guidewire, three sterile saline-soaked cotton balls, a sterilization pack, three paraffin oil cotton balls, a sterile drape, an anti-reflux urine collection bag, a pair of sterile gloves, and a pre-filled syringe with 20ml of saline solution.

[0027] The beneficial effects of this utility model are:

[0028] 1. The smaller diameter of the guidewire makes it easier to move in the body of patients with urinary tract stricture. After the guidewire is in place, the catheter is inserted from the end of the guidewire through the open port and slid along the guidewire. The guidewire guides the catheter into the patient's body. The design of the guidewire channel and the open port improves the success rate of catheterization.

[0029] 2. The inner layer of the catheter wall has a nano-silver-chitosan composite coating. The antibacterial coating is applied by magnetron sputtering, and the silver ion release cycle is up to 7 days, which can significantly improve the antibacterial performance and duration of the catheter, and reduce the incidence of urinary tract infection.

[0030] 3. The above-mentioned antibacterial catheterization device can be used to configure a modular catheterization instrument kit, and the modular packaging shortens the preparation time. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the urinary catheter of this utility model;

[0032] Figure 2 This is a schematic diagram of the guide wire of this utility model.

[0033] In the diagram: 1. Urinary catheter; 11. Water balloon cavity; 12. Guidewire channel; 121. Open port; 13. Urinary catheter channel; 14. Side hole; 15. Water inlet connector; 151. Water inlet channel; 2. Guidewire; 21. Straight section of the body; 22. Curved tip; 3. Barium contrast strip. Detailed Implementation

[0034] like Figure 1 and Figure 2 An antibacterial catheterization device is shown, comprising a guidewire 2 and a catheter 1. The catheter 1 is made of 60A hardness silicone, with a head end and a tail end at each end. The head end has a rounded design for easy insertion into the patient's body. The tail end is the catheter tip, and its inner side has a catheter channel 13 extending along the length of the catheter 1. A water inlet connector 15 protrudes laterally from the tail end, and the water inlet connector 15 has a water inlet channel 151 on its inner side, extending along the catheter 1 to the head end. A closed water balloon is designed at the head end of the catheter 1, and the water balloon has a water balloon cavity 11, which is interconnected with the water inlet channel 151. By injecting water into the water inlet connector 15, the water balloon can be inflated, thereby positioning the head end of the catheter 1 in the patient's bladder.

[0035] The urinary catheter 1 has a guidewire channel 12 on its inner side, through which a guidewire 2 can pass. An open port 121 is formed at the tip of the urinary catheter 1. A ring of barium contrast agent 3 is embedded circumferentially around the tip of the urinary catheter 1. During use, the guidewire 2 is first inserted into the patient's body for catheterization. The small diameter of the guidewire 2 facilitates movement within the body of patients with urinary tract stricture. After the guidewire 2 is in place, the urinary catheter 1 is inserted through the open port 121 from the tail end of the guidewire 2 and slid along the guidewire 2. Guided by the guidewire 2, it slides into the patient's body, significantly improving the success rate of catheter 1 insertion into patients with urinary tract stricture. Simultaneously, the barium contrast agent 3 allows the tip to be clearly visualized under X-ray, enabling the operator to clearly observe the movement of the catheter tip for adjustment. This design further enhances the success rate of catheter 1 insertion into patients with urinary tract stricture. Furthermore, the barium contrast strip 3 is located between the side hole 14 and the open port 121. The barium contrast strip 3 has a closed ring structure with its ends connected. The barium contrast strip 3 is set at the tip of the catheter and surrounds the outside of the guidewire channel 12. In this way, no matter how the catheter 1 rotates or moves, the ring-shaped barium contrast strip 3 on it can be clearly captured and visualized by X-rays, and will not overlap with the guidewire 2, resulting in local blurring. This design further improves the success rate of catheter 1 insertion.

[0036] Preferably, the diameter of the guidewire channel 12 is 1.2 mm, and the inner wall of the guidewire channel 12 has a polytetrafluoroethylene (PTFE) layer. The PTFE coating has a coefficient of friction of less than 0.1, which allows the guidewire 2 to pass through smoothly, thereby further improving the success rate of catheter insertion 1.

[0037] Preferably, the guidewire 2 is 1.5m long and has an outer diameter of 0.89mm. The guidewire 2 includes a straight body section 21 and a curved tip 22, both integrally formed. The curved tip 22 is J-shaped and flexible, while the straight body section 21 is more rigid than the tip. This allows a significant portion of the guidewire 2 to remain exposed after insertion into the patient's body. This exposed portion facilitates the insertion of the urinary catheter 1, allowing the catheter 1 to move along the guidewire 2 and accurately enter the patient's body, thus significantly improving the success rate.

[0038] Preferably, guidewire 2 uses a nickel-titanium alloy core with a polyurethane coating. The tip (3cm) is J-shaped with a radius of curvature of 20mm, and the working length is 150cm ± 5cm. The J-shaped bent tip 22 not only improves the success rate of catheter insertion but also reduces damage to the urethra during insertion. Nickel-titanium alloy has high tensile strength and is lightweight, with strong bending and deformation capabilities, making it ideal for use as a traction element. The polyurethane coating on the outer surface of the nickel-titanium alloy core significantly reduces friction between guidewire 2 and the inner wall of guidewire channel 12, ensuring smooth guidance and movement of the catheter 1. Furthermore, guidewire 2 is made of multiple strands of nickel-titanium alloy wire, forming a spiral groove on its outer surface. Multiple spiral grooves are spaced apart circumferentially along the guidewire 2, each extending along the length of the guidewire 2. This design results in a smaller contact area with the inner wall of guidewire channel 12 compared to a single, thicker nickel-titanium alloy wire, leading to smoother movement. Moreover, the multiple strands are more durable and have higher strength.

[0039] Furthermore, two pairs of four symmetrically arranged side holes 14, each with a diameter of 2 mm, are provided on the outer periphery of the catheter 1 at a distance of 2 cm from the tip. These side holes 14 are all connected to the catheter channel 13. The side holes 14 are used to guide urine into the catheter channel 13. The pairing of the side holes 14 can generate convection to avoid negative pressure and make the urine flow more smoothly.

[0040] Furthermore, the wall of catheter 1 comprises a hydrophilic coating and a nano-silver-chitosan composite coating from the outside to the inside, with the silver ion loading in the nano-silver-chitosan composite coating being 0.5-1.2 μg / cm³. 2 The nano-silver-chitosan composite coating exhibits excellent antibacterial properties, with a silver ion loading of 0.5-1.2 μg / cm³. 2 The preferred Ag+ concentration is 0.8 μg / cm³. 2 The antibacterial material is coated using a magnetron sputtering process, and the silver ion release cycle lasts for up to 7 days, which can significantly improve the antibacterial performance and duration of the urinary catheter 1.

[0041] A modular catheterization kit can be configured using the aforementioned antibacterial catheterization device, including a catheter 1, a guidewire 2, three sterile saline-soaked cotton balls, a sterilization pack, three paraffin-oiled cotton balls, a sterile drape, an anti-reflux urine collection bag, a pair of sterile gloves, and a pre-filled syringe containing 20ml of normal saline. Operating principle: On an X-ray fluoroscopy machine, with the patient supine, open the sterilization pack, perform routine disinfection with sterile cotton balls, and drape with a sterile drape. Under X-ray guidance, first moisten the guidewire 2 with a sterile saline-soaked cotton ball and insert it into the bladder along the urethra. Then, guide the paraffin-oiled catheter 1 through the guidewire 2. After the catheter 1 reaches the bladder, withdraw the guidewire 2. Inject 20ml of normal saline to fill the water-filled balloon. Connect the reflux urine collection bag.

[0042] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. At the same time, the basic principles, main features, and advantages of this utility model have been shown and described above, which should be understood by those skilled in the art.

Claims

1. An antibacterial catheterization device, comprising a guidewire (2) and a catheter (1) with a water-filled bladder cavity (11), wherein the catheter (1) has a guidewire channel (12) through which the guidewire (2) can pass, and the guidewire channel (12) forms an open port (121) at the tip of the catheter (1), characterized in that, The catheter (1) has at least one ring of barium contrast agent (3) around its circumference at its tip. The barium contrast agent (3) surrounds the guidewire channel (12) and the guidewire (2) can pass through the guidewire channel (12) from the inside of the barium contrast agent (3).

2. The antibacterial catheterization device according to claim 1, characterized in that, The diameter of the guide wire channel (12) is 0.9±0.05mm and the inner wall of the guide wire channel (12) has a polytetrafluoroethylene layer.

3. The antibacterial catheterization device according to claim 2, characterized in that, The guide wire (2) is 1.5m long and has an outer diameter of 0.89mm. The guide wire (2) includes a straight body (21) and a curved head end (22) which are integrally formed. The curved head end (22) is J-shaped.

4. The antibacterial catheterization device according to claim 3, characterized in that, The guide wire (2) includes a nickel-titanium alloy inner core, the outer surface of which is coated with a polyurethane coating.

5. An antibacterial catheterization device according to any one of claims 1-4, characterized in that, The catheter (1) has a catheter channel (13) on its inner side, and several symmetrically arranged side holes (14) are provided on the outer periphery of the head end of the catheter (1) and are all connected to the catheter channel (13).

6. The antibacterial catheterization device according to claim 5, characterized in that, The developing barium strip (3) is located between the side hole (14) and the open port (121).

7. The antibacterial catheterization device according to claim 6, characterized in that, The developing barium strip (3) has a closed ring structure with the ends connected.

8. An antibacterial catheterization device according to any one of claims 1-4, characterized in that, The catheter (1) has a hydrophilic coating and a nano-silver-chitosan composite coating on its wall from the outside to the inside. The silver ion loading in the nano-silver-chitosan composite coating is 0.5-1.2 μg / cm³. 2 .

9. The antibacterial catheterization device according to claim 1, characterized in that, The catheter (1) has an inner side with a water injection channel (151) communicating with the water balloon cavity (11), and the end of the catheter (1) has a water injection connector (15) communicating with the water injection channel (151).

10. A modular catheterization instrument kit, characterized in that, The device includes one urinary catheter (1) and one guidewire (2) according to any one of claims 1-9, three sterile saline-soaked cotton balls, one sterilization pack, three paraffin oil cotton balls, one sterile drape, one anti-reflux urine collection bag, one pair of sterile gloves, and one pre-filled syringe with 20ml of saline.

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