Local anesthesia coated urinary catheter

Abstract

The application discloses a local anesthesia coating urinary catheter, relates to the technical field of urinary catheters, and comprises a urinary catheter body, a guide device and a fixer, the surface of the urinary catheter body is coated with a super-smooth layer and an analgesic layer, the analgesic layer is coated on the outer super-smooth layer of the super-smooth layer; the fixer is used for fixing the other end of the urinary catheter body to the root of the thigh of a patient, the fixer comprises a clamping plate A and a clamping plate B, one end of the clamping plate A is integrally formed with a horizontal plate, one end of the clamping plate B is integrally formed with a clamping plate, and the inside of the clamping plate is processed with an adjusting notch; the technical key points are that one end of the horizontal plate is made to pass through the inside of the adjusting notch on the clamping plate, the ends of the clamping plate A and the clamping plate B are deformed away from each other, the sanding surface at the bottom of the adjusting notch and the surface of the horizontal plate is used for assisting the clamping of the clamping plate and the horizontal plate, one end of the urinary catheter body in the patient's body can be combined with the patient's limbs as much as possible, and the urinary catheter body can be prevented from slipping to the greatest extent.

Description

Technical Field

[0001] This utility model relates to the field of urinary catheter technology, specifically a local anesthetic coated urinary catheter. Background Technology

[0002] A urinary catheter is a tube inserted into the bladder through the urethra to drain urine. Made of natural rubber, silicone rubber, or polyvinyl chloride, it is inserted into the bladder via the urethra to drain urine. After insertion, a balloon near the tip of the catheter secures it in the bladder, preventing it from easily dislodging. The drainage tube is connected to a urine bag to collect urine.

[0003] Urinary catheters can be classified into single-lumen, double-lumen, and triple-lumen catheters based on their structure. Single-lumen catheters typically lack a balloon, have only one channel, are difficult to secure, have a short indwelling time, and require frequent removal and retrieval. Single-lumen catheters are used in surgery, emergency care, and rehabilitation. They consist of a latex balloon at the end, a latex tubing, and a catheter made of polyethylene or polypropylene. The advantages of single-lumen catheters are high durability, withstanding repeated insertions and withdrawals, and a lower risk of blood clots or urine clotting. The disadvantages are a slower urine outflow rate, a tendency for sediment to form inside the catheter, and the need for regular replacement. Single-lumen catheters are mainly used under spinal anesthesia or simpler regional blocks. Their main complications include bleeding, urine reflux, urinary retention, and urinary tract infection.

[0004] Patent document CN206261915U describes a super-lubricating analgesic urinary catheter. This catheter utilizes a super-lubricating surface modification technology, organically combining a hydrophilic polymer with the catheter's surface. Because the hydrophilic polymer forms a super-lubricating film upon contact with water, its lubricating effect far surpasses that of traditional lubricants, providing long-lasting lubrication. During insertion, removal, and indwelling, it reduces friction and irritation to the urethral mucosa, preventing urinary salt deposition and truly achieving painless catheterization. The analgesic layer of the super-lubricating analgesic catheter uses a coating containing local anesthetic, which slowly releases the drug to achieve local anesthesia, effectively alleviating patient pain.

[0005] The super-lubricating coating of this invention uses a hydrophilic polymer mainly composed of one or more substances such as polyvinyl alcohol, polyethylene oxide, and polyvinylpyrrolidone. It exhibits super-lubricating properties upon contact with water, resulting in low friction, easy operation, and minimal mucosal irritation, effectively reducing patient discomfort. The local anesthetic in the analgesic layer is formed by dissolving one of lidocaine, tetracaine, or bupivacaine in one or more substances such as dichloromethane, acetone, butanone, isopropanol, dimethylformamide, methylpyrrolidone, and polyethylene oxide. The super-lubricating coating is applied to the surface of the catheter body after modification by dipping or spraying, resulting in good fixation and resistance to detachment. Overall, this invention offers advantages such as convenient operation, minimal mucosal damage, and high user comfort.

[0006] However, research has revealed certain drawbacks in the use of existing local anesthetic-coated urinary catheters:

[0007] This super-slippery analgesic catheter reduces friction and irritation to the patient's urethral mucosa by using a super-lubricating layer, and achieves local anesthesia in conjunction with the analgesic layer to reduce the patient's pain. However, in actual application, because the catheter has increased lubricity to a certain extent, it has increased the ability to anesthetize the patient's urethral area, making it more susceptible to slippage due to external forces. Moreover, the patient may not easily feel this change, which can lead to urine leakage. Summary of the Invention

[0008] To overcome the shortcomings of the prior art, this application provides a local anesthesia coated urinary catheter. By passing one end of the horizontal plate through the adjustment groove on the clamping plate, the ends of clamping plates A and B are deformed away from each other. The frosted surface of the horizontal plate and the inner wall of the bottom of the adjustment groove helps to hold the clamping plate and the horizontal plate in place. The end of the urinary catheter body placed in the patient's body can be integrated with the patient's limb as much as possible. This can achieve the technical effect of minimizing the patient's inability to feel the subtle changes in the insertion of the urinary catheter body due to the lubricating and analgesic coating on the outer wall of the urinary catheter body, and making it easier for the urinary catheter body to move in the patient's urethra and produce a certain degree of slippage.

[0009] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0010] A local anesthetic coated urinary catheter includes a catheter body, a guide, and a fixator, wherein the guide is machined to one end of the catheter body; and

[0011] The fixator is assembled and connected to the other end of the catheter body;

[0012] The catheter body has a surface coated with a super-slippery layer and an analgesic layer, with the analgesic layer applied to the outer surface of the super-slippery layer. Both the coating and the analgesic layer on the catheter body extend to the surface of the guide. The guide guides the catheter body through one end into the patient's urethra, and the fixator secures the other end of the catheter body to the patient's groin.

[0013] Preferably, the guide includes a urinary catheter head, one end of which is integrally formed with a guide head, the guide head being bent inward at one end of the urinary catheter head and maintaining a channel inside the guide head.

[0014] Preferably, the urinary catheter head has two liquid-passing grooves internally machined, and the two liquid-passing grooves are symmetrically arranged on both sides of the axis of the urinary catheter head.

[0015] Preferably, the outer wall of the urinary catheter head is machined with an annular groove, the cross-section of the middle part of the annular groove is rectangular, the cross-sections of the two ends are isosceles trapezoids, and the interior of the two liquid-passing grooves is connected to the interior of the annular groove.

[0016] Preferably, the fastener includes clamp A and clamp B. One end of clamp A is integrally formed with a horizontal plate, and one end of clamp B is integrally formed with a locking plate. The locking plate has an adjustment groove machined inside. One end of the horizontal plate passes through the inside of the adjustment groove. One end of clamp A and clamp B deform away from each other, so that the locking plate and the horizontal plate are locked together, restricting clamp B and clamp A from moving away from each other.

[0017] Preferably, the bottom surface of the horizontal plate and the bottom inner wall of the adjustment slot are both processed into a frosted surface, the cross section of the adjustment slot is a right trapezoid, and when one end of the clamping plate B moves closer to one end of the clamping plate A, the clamping plate moves outside the horizontal plate through the adjustment slot.

[0018] Preferably, a buckle is integrally formed on the surface of one end of the cross plate, and the catheter body is adapted to be connected to the inside of the buckle. The catheter body and the buckle are interference-fitted to restrict the movement of the catheter body inside the buckle.

[0019] Preferably, one end of the buckle is integrally formed with a guide arc plate, the guide arc plate having the opposite curvature to the buckle, and the guide arc plate guiding the catheter body to be snapped into the inside of the buckle on the outside of the clamp A.

[0020] In summary, this utility model has at least one of the following beneficial technical effects:

[0021] Firstly, this utility model of a local anesthetic coated urinary catheter allows one end of a horizontal plate to pass through the adjustment groove on a clamping plate, causing one end of clamping plate A and clamping plate B to deform away from each other. The frosted surface of the horizontal plate and the inner wall at the bottom of the adjustment groove helps the clamping plate and horizontal plate to hold together. This allows the end of the urinary catheter body placed inside the patient's body to be integrated with the patient's limb as much as possible, minimizing the risk of the urinary catheter body slipping out.

[0022] Secondly, this utility model of a local anesthetic coated urinary catheter incorporates a guide at one end of the catheter body. The guide consists of a catheter tip and a guide head machined at one end of the catheter tip. When the catheter body is inserted into the patient's urethra through the catheter tip, the guide head provides guidance. Combined with the super-slippery layer and analgesic layer coated on the outer walls of the catheter body and the guide head, and with the help of the channel, fluid groove, and ring groove on the inner side of the guide head, as much urine as possible is discharged through the fluid groove into the guide head and the catheter body. This avoids discomfort caused by the patient's own perception of urine accumulation when urine remains during catheterization. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a cross-sectional view of the guide of this utility model;

[0025] Figure 3 This is one of the structural schematic diagrams of the fixture of this utility model;

[0026] Figure 4 This is the second structural schematic diagram of the fixture of this utility model;

[0027] Figure 5 This is the front view of the fixture of this utility model.

[0028] Reference numerals in the attached diagram: 1. Guide; 101. Urinary catheter tip; 102. Guide head; 2. Main body of urinary catheter; 3. Fixer; 301. Clamp A; 302. Clamp B; 303. Horizontal plate; 304. Clamping plate; 305. Buckle seat; 306. Guide arc plate; 4. Fluid passage groove; 5. Circular groove; 6. Adjustment groove. Detailed Implementation

[0029] Example 1:

[0030] A local anesthetic coated urinary catheter, such as Figures 1-3 As shown, it includes a catheter body 2, a guide 1 processed to one end of the catheter body 2, and a fixator 3 assembled and connected to the other end of the catheter body 2. The surface of the catheter body 2 is coated with a super-slippery layer and an analgesic layer, with the analgesic layer coated on the super-slippery layer outside the super-slippery layer.

[0031] Among them, the coating layer and analgesic layer on the catheter body 2 are both extended to the surface of the guide 1. The guide 1 and the catheter body 2 adopt the super-lubricating surface modification technology to organically combine the hydrophilic polymer. Since the hydrophilic polymer forms a lubricating layer when it comes into contact with water.

[0032] Meanwhile, an analgesic layer containing local anesthetic (formed by dissolving one of lidocaine, ropivacaine, tetracaine, bupivacaine in one or more of dichloromethane, acetone, butanone, isopropanol, dimethylformamide, methylpyrrolidone, and polyoxyethylene) can be used to slowly release the drug through the analgesic layer, thereby achieving the effect of local anesthesia. All of the above are well-known techniques.

[0033] like Figure 1 and Figure 2 As shown, the guide 1 includes a urinary catheter head 101, and a guide head 102 is integrally formed at one end of the urinary catheter head 101;

[0034] In this method, by bending the guide head 102 inward at one end of the catheter head 101 while maintaining the channel inside the guide head 102, when the guide 1 guides the catheter body 2 through the patient's urethra, the guide head 102 on the guide 1 can provide guidance with the assistance of the analgesic layer and the lubricating layer, thereby minimizing the discomfort caused to the patient when the catheter body 2 is installed in the urethra.

[0035] Secondly, to facilitate the drainage of as much urine as possible through the catheter body 2 when the guide 1 is inserted into the patient's body, and to avoid discomfort caused by the patient's own perception of urine accumulation when urine residue remains during catheterization, such as... Figure 2 As shown, the urinary catheter head 101 has two liquid-passing grooves 4 inside. By symmetrically arranging the two liquid-passing grooves 4 on both sides of the axis of the urinary catheter head 101, the strip-shaped arrangement of the liquid-passing grooves 4 can help to allow as much urine as possible to pass through the liquid-passing grooves 4 into the guide 1 and the urinary catheter body 2 when one end of the guide 1 is inserted into the patient's urethra to the bladder, depending on the degree of insertion.

[0036] Furthermore, to facilitate the easy entry of urine into the liquid flow channel 4, such as... Figure 2 As shown, the outer wall of the urinary catheter head 101 is machined with an annular groove 5. By setting the cross-section of the middle part of the annular groove 5 to be rectangular and the cross-section of both ends to be isosceles trapezoidal, after connecting the interior of the two liquid-passing grooves 4 with the interior of the annular groove 5, a gap can be left between the surface of the urinary catheter head 101 and the inner wall of the annular groove 5, thereby leaving a corresponding space for urine to flow through.

[0037] This utility model discloses a local anesthesia coated urinary catheter by processing a guide 1 at one end of the urinary catheter body 2. The guide 1 consists of a catheter head 101 and a guide head 102 processed at one end of the catheter head 101. When the urinary catheter body 2 is inserted into the patient's urethra through the catheter head 101, the guide head 102 can be used to form a guide. With the super-slippery layer and analgesic layer coated on the outer wall of the urinary catheter body 2 and the guide 1, the discomfort caused to the patient when the urinary catheter body 2 is installed in the urethra can be minimized.

[0038] Meanwhile, the inner part of the catheter head 101 has two symmetrical fluid passage grooves 4 symmetrical to the axis, while the outer wall of the catheter head 101 has an annular groove 5. When the guide 1 and the catheter body 2 are inserted into the patient's urethra and reach the bladder, the channel, fluid passage grooves 4 and annular groove 5 on the inner side of the guide head 102 can be used to allow as much urine as possible to pass through the fluid passage grooves 4 into the guide 1 and the catheter body 2, thus avoiding discomfort caused by urine accumulation in the patient when urine remains during catheterization.

[0039] Example 2:

[0040] Based on Example 1, such as Figure 1 , Figures 3 to 5 As shown, this embodiment is the specific structure of the fixator 3. As shown, the fixator 3 includes a clamping plate A301 and a clamping plate B302. One end of the clamping plate A301 is integrally formed with a horizontal plate 303, and one end of the clamping plate B302 is integrally formed with a clamping plate 304. The clamping plate 304 has an adjustment groove 6 processed inside.

[0041] Specifically, by having one end of the horizontal plate 303 pass through the inside of the adjusting slot 6, and deforming one end of the clamping plates A301 and B302 away from each other, the clamping plate 304 and the horizontal plate 303 are locked together (as shown in the figure). Figure 5 As shown in section II), when the splints A301 and B302 are fitted onto the patient's thigh, the splints B302 and A301 are restricted from moving away from each other, preventing one end of the catheter body 2 from being pulled and causing the guide 1 at the other end of the catheter body 2 to slide out of the patient's body (affected by the super-slippery layer and analgesic layer on the guide 1 and the catheter body 2). Finally, the fixator 3 is used to fix one end of the catheter body 2 to the patient's groin.

[0042] Meanwhile, in order to assist the clamping plates A301 and B302 in deforming away from each other, so that the clamping plate 304 and the horizontal plate 303 can be locked together, such as Figure 3 and Figure 4 As shown, the bottom surface of the horizontal plate 303 and the bottom inner wall of the adjusting slot 6 are both processed into a frosted surface. By setting the cross-section of the adjusting slot 6 into a right-angled trapezoid, when one end of the clamping plate B302 approaches one end of the clamping plate A301, the locking plate 304 can move outside the horizontal plate 303 through the adjusting slot 6 (e.g., Figure 5 As shown in section I), after one end of the control clamping plate A301 and clamping plate B302 are deformed away from each other, the bottom surface of the horizontal plate 303 and the bottom inner wall of the adjustment slot 6 can be made to fit together. With the help of the increased friction from the frosted surface, the clamping plate 304 and the horizontal plate 303 are secured.

[0043] Secondly, to facilitate the assembly and fixation of the catheter body 2 and the fixator 3, such as... Figures 3 to 5 As shown, a buckle 305 is integrally formed on the surface of one end of the horizontal plate 303. By adapting the catheter body 2 to the inside of the buckle 305, the catheter body 2 and the buckle 305 are press-fitted, which can restrict the movement of the catheter body 2 inside the buckle 305, thereby connecting and fixing the catheter body 2 to the fixator 3.

[0044] Meanwhile, by integrally forming a guide arc plate 306 at one end of the buckle 305, and by making the curvature of the guide arc plate 306 and the buckle 305 opposite, the guide arc plate 306 can guide the catheter body 2 to be snapped into the inside of the buckle 305 on the outside of the clamp A301, which facilitates the connection between the catheter body 2 and the fixator 3.

[0045] This utility model discloses a local anesthesia coated urinary catheter. It utilizes clamps A301 and B302 on a fixator 3. A horizontal plate 303, machined to one end of clamp A301, passes through a clamping plate 304, machined to one end of clamp B302. One end of the horizontal plate 303 passes through an adjustment slot 6 on the clamping plate 304. This causes one end of clamps A301 and B302 to deform away from each other. The frosted surfaces of the horizontal plate 303 and the bottom inner wall of the adjustment slot 6 assist in securing the clamping plate 304 and the horizontal plate 303. This allows the clamps A301 and B302 to be held in place. When B302 is fitted onto the patient's thigh, it restricts the distance between the splint B302 and the splint A301, preventing one end of the catheter body 2 from being pulled and causing the guide 1 at the other end of the catheter body 2 to slip out of the patient's body. This facilitates the integration of the end of the catheter body 2 inside the patient's body with the patient's limb as much as possible, minimizing the possibility that the patient may not easily perceive subtle changes in the insertion of the catheter body 2 due to the lubricating and analgesic coating on its outer wall, and that the catheter body 2 may move more easily in the patient's urethra, resulting in a certain degree of slippage.

[0046] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A local anesthetic coated urinary catheter, characterized in that, include: The main body of the urinary catheter (2); A guide (1) is machined to one end of the catheter body (2); as well as Fixer (3), which is assembled and connected to the other end of the catheter body (2); The surface of the catheter body (2) is coated with a super-slippery layer and an analgesic layer. The analgesic layer is coated on the super-slippery layer outside the super-slippery layer. The coating layer and the analgesic layer on the catheter body (2) both extend to the surface of the guide (1). The guide (1) guides the catheter body (2) through one end into the patient's urethra, and the fixator (3) fixes the other end of the catheter body (2) to the patient's groin.

2. The local anesthetic coated urinary catheter as described in claim 1, characterized in that: The guide (1) includes a urinary catheter head (101), one end of which is integrally formed with a guide head (102). The guide head (102) bends inward at one end of the urinary catheter head (101) and maintains the channel inside the guide head (102).

3. The local anesthetic coated urinary catheter as described in claim 2, characterized in that: The urinary catheter head (101) has two liquid-passing grooves (4) inside, and the two liquid-passing grooves (4) are symmetrically arranged on both sides of the axis of the urinary catheter head (101).

4. The local anesthetic coated urinary catheter as described in claim 3, characterized in that: The outer wall of the urinary catheter head (101) is machined with an annular groove (5). The cross-section of the middle part of the annular groove (5) is rectangular, and the cross-sections of the two ends are isosceles trapezoids. The interior of the two liquid-passing grooves (4) is connected to the interior of the annular groove (5).

5. The local anesthetic coated urinary catheter as described in claim 4, characterized in that: The fixture (3) includes a clamping plate A (301) and a clamping plate B (302). One end of the clamping plate A (301) is integrally formed with a horizontal plate (303), and one end of the clamping plate B (302) is integrally formed with a clamping plate (304). The clamping plate (304) has an adjustment groove (6) processed inside. One end of the horizontal plate (303) passes through the inside of the adjustment slot (6), and one end of the clamping plate A (301) and the clamping plate B (302) are deformed away from each other, so that the clamping plate (304) and the horizontal plate (303) are locked together, restricting the clamping plate B (302) and the clamping plate A (301) from moving away from each other.

6. The local anesthetic coated urinary catheter as described in claim 5, characterized in that: The bottom surface of the horizontal plate (303) and the bottom inner wall of the adjustment slot (6) are both processed into a frosted surface. The cross section of the adjustment slot (6) is a right trapezoid. When one end of the clamping plate B (302) moves closer to one end of the clamping plate A (301), the clamping plate (304) moves outside the horizontal plate (303) through the adjustment slot (6).

7. A local anesthetic coated urinary catheter as described in claim 5, characterized in that: The surface of one end of the horizontal plate (303) is integrally formed with a buckle (305), and the catheter body (2) is adapted to be connected to the inside of the buckle (305). The catheter body (2) and the buckle (305) are press-fitted to restrict the movement of the catheter body (2) inside the buckle (305).

8. A local anesthetic coated urinary catheter as described in claim 7, characterized in that: One end of the buckle (305) is integrally formed with a guide arc plate (306). The curvature of the guide arc plate (306) is opposite to that of the buckle (305). The guide arc plate (306) guides the catheter body (2) to be snapped into the inside of the buckle (305) on the outside of the clamp A (301).

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