Urinary catheter device

Abstract

The application relates to a catheterization device, belonging to the technical field of daily nursing instruments for urinary patients. The catheterization device comprises a catheter and a guide cone, the guide cone is slidably arranged in the catheter, the guide cone comprises a cylindrical section and a conical section, the cylindrical section and the conical section are provided with an operation channel in communication with each other, the device further comprises a driving mechanism, the driving mechanism comprises a driving end and a traction end, the driving end comprises a driving disc and a pulling steel wire, the driving disc is slidably arranged in the inner side of the guide cone, a limiting step is arranged in the operation channel, and the traction end comprises a pulling disc. The guide cone is slidably arranged, the driving mechanism is double-fixed, and the guide cone has elastic recovery capacity, so that the original guiding function of the catheterization device is maintained, the drainage effect is improved, the bladder is not uncomfortable, the catheterization operation of medical staff is facilitated, and the patients can happily accept the catheterization operation.

Description

Technical Field

[0001] This invention relates to the field of daily care devices for urinary patients, specifically a catheterization device that can avoid bladder damage and poor drainage. Background Technology

[0002] To guide the catheter into the urethra, the tip of the urinary catheter is made of a relatively rigid material, such as polyvinyl chloride (PVC), to provide strength and prevent bending during insertion. It also features a specific guide taper to facilitate entry. While these improvements functionally achieve rapid catheterization, other problems arise during use. For example, the guide taper's length can irritate the bladder wall, causing discomfort and potentially leading to inflammation and swelling with prolonged use, resulting in catheterization failure. Furthermore, the taper's diameter tends to narrow, making the drainage opening too small and hindering urine drainage, especially in cases of hematuria or blood clots. Additionally, the drainage opening, located on the guide taper and maximized, creates a distance between the opening and the bladder neck (the lowest point of the urine level), making full catheterization difficult and leading to urine residue in the bladder.

[0003] To address the aforementioned issues, it is necessary to make adaptive improvements to existing catheterization devices that can maintain their original guiding function, improve drainage efficiency, and avoid causing discomfort to the bladder. This would facilitate catheterization procedures for medical staff and make the procedure more palatable for patients. Summary of the Invention

[0004] In view of this, the present invention provides a urinary catheterization device in order to partially or completely solve the technical problems mentioned in the background art above.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A urinary catheterization device includes a urinary catheter and a guide cone. The guide cone is slidably disposed within the urinary catheter. The guide cone includes a cylindrical section and a conical section integrally formed with the cylindrical section. The cylindrical section and the conical section are provided with an interconnecting operating channel. The device also includes a drive mechanism disposed within the operating channel for horizontally moving the guide cone within the urinary catheter. The drive mechanism includes a drive end and a traction end. The drive end includes a drive disc and a traction wire fixed to the drive disc. The other end of the traction wire extends out of the urinary catheter for drive operation. The drive disc is slidably disposed inside the guide cone. A limiting step is provided within the operating channel to prevent the drive disc from dislodging. The traction end includes a traction disc fixed to the drive disc by a traction rod. The traction disc is slidably disposed within the operating channel at the tip of the conical section.

[0007] Furthermore, the conical segment is composed of multiple conical arc-shaped lobes, and each conical arc-shaped lobe is provided with an elastic sheet between itself and the cylindrical segment to restore itself to be parallel to the central axis of the cylindrical segment.

[0008] Furthermore, the traction disc is externally fixed with a binding membrane for wrapping and fixing the cone tip of the conical segment, and the fixing force between the binding membrane and the conical segment is greater than the restoring force of the elastic sheet.

[0009] Furthermore, the conical arc-shaped petals are provided with a total of 3-6 petals, which are evenly distributed on the circumference.

[0010] Furthermore, the elastic sheet is a titanium alloy sheet or a spring steel sheet.

[0011] Furthermore, the catheter is provided with a guide cone limiting platform for limiting the guide cone to be located in the catheter orifice area. Under the action of the guide cone limiting platform, the drive mechanism can disengage from the limiting step and exit the guide cone.

[0012] Furthermore, a fixation balloon is provided on the outside of the catheter.

[0013] Furthermore, multiple traction arms are provided on the circumference of the drive disk. The multiple traction arms extend radially toward the center of the drive disk and intersect with the fixed column provided at its center. A traction ring is provided on the fixed column. The traction steel wire is fixed to the traction ring. One end of the traction rod is fixed to the fixed column.

[0014] Furthermore, the traction disc is provided with a connecting arm, and the other end of the traction rod is fixed to the connecting arm.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. The present invention uses a guide cone that is slidably set inside the urinary catheter, thereby adjusting the length of the guide cone extending out of the urinary catheter, thereby reducing the height of the urinary catheter opening and improving the drainage level; furthermore, when the guide cone is adjusted to the inside of the urinary catheter, the opening of the urinary catheter becomes the urinary catheter opening, thereby maximizing the drainage level.

[0017] 2. The present invention uses a combination of a drive mechanism with one end fixed to the conical section and the other end fixed to the cylindrical section, and a limiting step for limiting the movement of the drive mechanism to perform traction operation on the guide cone, thereby enabling medical personnel to perform precise operation externally.

[0018] 3. The present invention sets the guide cone as a combination structure of multiple conical arc-shaped lobes, and uses a binding membrane to initially limit it to form a cone shape, which facilitates guidance. When the driving mechanism pulls the external binding membrane away from the guide cone, its conical arc-shaped lobes deform under the elastic recovery action of the elastic sheet and return to their original straight state, thereby increasing its passing area, reducing resistance, and increasing the drainage volume.

[0019] In summary, this invention, through its sliding guide cone, double-fixed drive mechanism, and elastically recoverable guide cone, maintains the original guiding function of the catheterization device, improves the drainage effect, reduces bladder stimulation, lowers patient pain, and avoids patient discomfort, thereby improving patient comfort, acceptance, and satisfaction. For medical staff, it can reduce workload and significantly improve work efficiency. Attached Figure Description

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 This is a cross-sectional view of the present invention;

[0022] Figure 2 This is a schematic diagram of the fixed airbag after it has been deployed according to the present invention;

[0023] Figure 3 This is a schematic diagram showing the state of the guide cone of the present invention entering the urinary catheter;

[0024] Figure 4 This is a schematic diagram of the state of the drive mechanism of the present invention after it is disengaged from the guide cone;

[0025] Figure 5 This is a schematic diagram of the drive mechanism of the present invention completely disengaged from the guide cone and the guide cone is in the open state.

[0026] Figure 6 This is a schematic diagram showing the state of the drive mechanism of the present invention after it has been completely detached from the catheter.

[0027] Figure 7 A schematic diagram of a guide cone;

[0028] Figure 8 This is a schematic diagram showing the guide cone after it has been opened.

[0029] Figure 9 This is the front view of the guide cone;

[0030] Figure 10 The main view after the guide cone is opened;

[0031] Figure 11 This is a schematic diagram of the first direction of the drive mechanism;

[0032] Figure 12 This is a schematic diagram of the second direction of the drive mechanism.

[0033] Figure label:

[0034] 1-Urinary catheter; 2-Guide cone; 3-Cylindrical section; 4-Conical section; 5-Operating channel; 6-Drive mechanism; 7-Drive end; 8-Traction end; 9-Drive disc; 10-Traction wire; 11-Limiting step; 12-Traction disc; 13-Traction rod; 14-Conical arc-shaped valve; 15-Elastic sheet; 16-Restraint membrane; 17-Guide cone limiting platform; 18-Fixing airbag; 19-Traction arm; 20-Fixing column; 21-Traction ring; 22-Connecting arm; 23-Connecting foot. Detailed Implementation

[0035] like Figure 1-12 As shown, the present invention provides a urinary catheterization device, including a catheter 1 and a guide cone 2. Specifically, in this embodiment, the guide cone 2 is slidably disposed within the catheter 1, thereby allowing for length variation relative to the opening of the catheter 1, lowering the water level at the catheter opening, and facilitating drainage. The guide cone 2 includes a cylindrical section 3 and a conical section 4, which are integrally formed with the cylindrical section 3. An interconnected operating channel 5 is provided within the cylindrical section 3 and the conical section 4, for moving the guide cone 2. In particular, this embodiment also includes a drive mechanism 6, which is disposed within the operating channel 5 and performs horizontal movement of the guide cone 2 within the catheter 1. The device includes a drive end 7 and a traction end 8. The drive end 7 includes a drive disc 9 and a traction wire 10 fixed on the drive disc 9. The other end of the traction wire 10 extends out to the catheter 1 for drive operation. The drive disc 9 is slidably disposed inside the guide cone 2, and a limiting step 11 is provided in the operation channel 5. The limiting step 11 is used to prevent the drive disc 9 from dislodging. Under the action of the anti-dislodging force, the traction operation of the guide cone 2 is realized. The traction end 8 includes a traction disc 12. The traction disc 12 is fixed to the drive disc 9 through the traction rod 13, thus forming an integral whole and realizing the transmission of force. The traction disc 12 is slidably disposed in the operation channel 5 at the tip of the cone section 4 to facilitate the final separation between the two.

[0036] In use, the drive mechanism 6 is pulled by the external traction steel wire 10, so that the drive mechanism 6 moves within the operating channel 5. Due to the limiting step 11, the drive mechanism 6 can be restricted within the operating channel 5, and the guide cone 2 can be further dragged to move, causing a change in length relative to the opening of the catheter 1, thereby achieving the goal of lowering the water level and shortening the length.

[0037] As an improvement to this embodiment, the conical segment 4 is composed of multiple conical arc-shaped petals 14. Each conical arc-shaped petal 14 is provided with an elastic sheet 15 between it and the cylindrical segment 3. In this embodiment, the elastic sheet 15 is a titanium alloy sheet or a spring steel sheet, which has a high elastic recovery force. When the elastic sheet 15 is a flat sheet, the conical arc-shaped petal 14 can be fully unfolded into a flat state and restored to a direction parallel to the central axis of the cylindrical segment 3, thereby increasing the passing area and improving the throughput and drainage volume.

[0038] As a further improvement of this embodiment, a binding membrane 16 is fixed to the outside of the traction plate 12. The binding membrane 16 can be made of rubber material, which has high elasticity and good toughness. When it is fixed to the outside of the cone tip of the conical segment 4, it binds the elastic sheet 15, thereby forming a conical guide cone 2. At this time, the fixing force between the binding membrane 16 and the conical segment 4 is greater than the restoring force of the elastic sheet 15.

[0039] When the drive mechanism 6 further pulls the traction plate 12, after its pulling force overcomes the fixing force and friction, the binding membrane 16 will slowly detach from the surface of the conical section 4 and eventually leave the conical section 4. At this time, the conical arc-shaped petals 14 unfold into a straight state.

[0040] As a further improvement to this embodiment, the conical arc-shaped petals 14 are provided with a total of 3-6 petals, which are evenly distributed on the circumference.

[0041] As a further improvement of this embodiment, a guide cone limiting platform 17 is provided inside the catheter 1. The guide cone limiting platform 17 prevents the guide cone 2 from completely detaching from the catheter 1, and also limits the guide cone 2 to the orifice area of ​​the catheter 1. Since it has an elastic sheet 15, it has a certain rigidity and can form support or even an expanded state in the orifice area of ​​the catheter 1, thereby maintaining the maximum passage area and the maximum flow rate.

[0042] In addition, in this embodiment, the height of the guide cone limiting platform 17 is not limited, but it must at least ensure that, under its blocking effect, the drive mechanism 6 can disengage from the limiting step 11 and exit the guide cone 2, thereby achieving complete separation and removal of the catheter 1.

[0043] As a further improvement of this embodiment, a fixing balloon 18 is provided on the outside of the urinary catheter 1. Before operation, the fixing balloon 18 needs to be fixed to the bladder opening to provide reaction force during operation.

[0044] As a further improvement to this embodiment, multiple traction arms 19 are arranged on the circumference of the drive disk 9. These traction arms 19 extend radially towards the center of the drive disk 9 and intersect with a fixed post 20 located at its center. A traction ring 21 is provided on the fixed post 20, and a pulling wire 10 is fixed to the traction ring 21. One end of the pulling rod 13 is fixed to the fixed post 20. Through the multiple traction arms 19, the traction force is evenly distributed on the drive disk 9, ensuring stable traction balance, preventing deviation, and improving the success rate of operation.

[0045] As a further improvement of this embodiment, the traction plate 12 is provided with a connecting arm 22, and the other end of the traction rod 13 is fixed to the connecting arm 22. In this embodiment, the connecting arm 22 is provided with at least two connecting feet 23 and fixed to the traction plate 12, thereby further improving the stability of the traction operation.

[0046] Methods for using this catheterization device to perform urinary catheterization:

[0047] Preoperative preparation: Check the integrity of each component of the catheterization device to ensure that the catheter 1, guide cone 2 and drive mechanism 6 are connected normally. In the initial state, the conical segment 4 of the guide cone 2 is composed of multiple conical arc-shaped flaps 14, and the binding membrane 16 is fixed to the outside of the cone tip of the conical segment 4 to bind the elastic sheet 15 and keep the conical segment 4 in a conical shape.

[0048] Inserting the catheter: Slowly insert the catheter 1 along the urethra into the bladder. At this time, the conical segment 4 of the guide cone 2 is conical, which can reduce the insertion resistance and help the catheter 1 to enter the target position smoothly.

[0049] Fixing the urinary catheter: Inflate the fixing balloon 18 outside the urinary catheter 1 to fix the fixing balloon 18 to the bladder opening, providing a reaction force for subsequent operations and preventing the urinary catheter 1 from shifting during the operation.

[0050] Initial drainage adjustment: The drive mechanism 6 is driven by the external traction wire 10, causing it to move within the operating channel 5. Due to the limiting effect of the limiting step 11 within the operating channel 5, the drive disc 9 is confined within the operating channel 5, thereby dragging the guide cone 2 relative to the opening of the catheter 1, changing the length of the guide cone 2 extending beyond the opening of the catheter 1, lowering the water level at the catheter opening, and facilitating initial drainage.

[0051] To increase drainage volume: If further increase drainage volume is required, continue to pull the traction end 8 of the drive mechanism 6 by pulling the steel wire 10. The traction disc 12 transmits the pulling force through the traction rod 13. When the pulling force overcomes the fixing force and friction between the restraining membrane 16 and the conical section 4, the restraining membrane 16 gradually detaches from the surface of the conical section 4 and eventually leaves. At this time, the conical arc-shaped flap 14 unfolds into a straight state (parallel to the central axis of the cylindrical section 3) under the elastic restoring force of the elastic sheet 15, increasing the passage area and throughput of the catheter 1 orifice.

[0052] Maintaining drainage status: Under the restriction of the guide cone limiting platform 17, the guide cone 2 is confined to the orifice area of ​​the catheter 1. Due to the rigidity of the elastic sheet 15, the cone-shaped arc-shaped flap 14 maintains a flat support or expansion state, ensuring that the orifice of the catheter 1 maintains the maximum passage area and the maximum flow rate.

[0053] End of operation and separation: Continue to pull the traction wire 10 so that the drive mechanism 6 overcomes the restriction of the limiting step 11, the drive disc 9 disengages from the limiting step 11 and exits the operating channel 5 of the guide cone 2, and finally completely removes the drive mechanism 6 (including the drive end 7, the traction end 8 and the traction wire 10, etc.) from the catheter 1 to complete the catheterization operation.

[0054] Based on the above, this application provides a specific embodiment:

[0055] 1. Urinary catheter

[0056] Material selection: Medical-grade silicone rubber is used, which has good biocompatibility, flexibility and aging resistance, and can reduce the risk of urethral mucosal irritation.

[0057] Size specifications:

[0058] Tube length: 400mm (fits the physiological length of the adult urethra, with allowance for operation).

[0059] Inner diameter of the tube: 8mm (to meet the normal drainage flow requirements of adults), outer diameter: 10mm;

[0060] Guide cone limiting platform 17: It adopts an integral molding structure with the tube body, with an annular protrusion height of 1.5mm and an inner diameter of 6mm. It is set at a distance of 30mm from the catheter orifice (drainage end), which not only prevents the guide cone 2 from completely detaching, but also limits its movement in the key drainage area.

[0061] Fixed balloon 18: Located 80mm from the insertion end of the urinary catheter (away from the drainage end), it is made of medical-grade natural latex. The thickness is 0.3mm when uninflated and the diameter can reach 25mm when inflated. It is connected to the external inflation interface through the built-in inflation channel (1mm in diameter) on the side wall of the urinary catheter. The inflation pressure is controlled at 0.02-0.03MPa to ensure that it is firmly fixed to the bladder opening without damaging the tissue.

[0062] 2. Guide cone 2

[0063] Overall structural parameters:

[0064] Total length: 60mm, of which cylindrical section 3 is 35mm long and conical section 4 is 25mm long;

[0065] Cylindrical section 3 outer diameter: 5.8mm (to fit the inner diameter of the catheter with clearance to ensure smooth sliding), inner diameter 4mm (forming the operating channel 5);

[0066] Conical segment 4: It consists of 4 conical arc-shaped petals 14 (evenly distributed around the circumference, taking into account both support stability and unfolding flexibility). The generatrix length of the conical surface of each arc-shaped petal is 25mm in the initial state, and the length in the straight state after unfolding is 30mm, with a thickness of 0.8mm.

[0067] Material selection:

[0068] Cylindrical segment 3 and conical arc-shaped flap 14: Made of medical-grade polypropylene, which combines rigidity and a certain degree of toughness, it can maintain its shape when supported and avoid excessive rigidity that could damage tissue.

[0069] Elastic sheet 15: 0.2mm thick medical titanium alloy sheet (TA2 pure titanium material) is selected. It has stable elastic recovery force and long fatigue life. Two elastic sheets are symmetrically fixed at the connection between each conical arc-shaped flap and the cylindrical segment. One end of the elastic sheet is fixed to the inner wall of the cylindrical segment by laser welding, and the other end is embedded in the inner groove of the arc-shaped flap to ensure that the arc-shaped flap can maintain a straight state parallel to the central axis of the cylindrical segment after it is unfolded.

[0070] Restraint membrane 16: Made of medical-grade nitrile rubber membrane, 0.15mm thick and 20mm wide, it is partially fixed to the outside of the cone tip of the conical segment by medical-grade cyanoacrylate adhesive. The fixed area is about 10mm², and the fixing force is set to 5N (greater than the initial recovery force of 3N of the elastic sheet, to ensure the stability of the cone shape in the initial state).

[0071] 3. Drive mechanism 6

[0072] Driver 7:

[0073] Drive plate 9: Made of medical-grade polycarbonate, with a diameter of 3.8mm (fitting with the operating channel 5 with clearance) and a thickness of 3mm. Three traction arms 19 are evenly distributed on the circumference (with an included angle of 120° to ensure force balance). The traction arms are 1mm wide and 1.5mm long, extending towards the center and integrally formed with the central fixing column 20 (1.5mm in diameter and 2mm in height).

[0074] Traction ring 21: Made of medical-grade stainless steel wire (304 material) bent into shape, with a diameter of 1mm, welded and fixed to the top of the fixing column, used to connect the traction steel wire 10;

[0075] 10. Pulling wire: 0.5mm diameter medical stainless steel wire (316L material) is selected. The surface is polished to reduce friction. The length is 500mm (one end is fixed to the traction ring, and the other end extends out of the catheter, leaving enough operating length).

[0076] Traction end 8:

[0077] Traction plate 12: made of medical-grade polycarbonate, 3.8mm in diameter and 2mm thick, with two connecting arms 22 (symmetrically distributed), each connecting arm having two connecting feet 23 at the end (in a "Y" shape, integrally formed with the traction plate), the fixing area between the connecting feet and the traction plate is approximately 1.5mm², ensuring stable force transmission;

[0078] Traction rod 13: made of medical stainless steel (316L), with a diameter of 0.8mm and a length of 25mm. One end is connected to the fixed post 20 of the drive plate by laser welding, and the other end is welded to the connecting arm 22 of the traction plate. The coaxiality error is controlled within 0.1mm to avoid deviation during traction.

[0079] Limiting structure: The limiting step 11 in the operating channel 5 is an annular protrusion integrally formed with the guide cone cylindrical section, with a height of 0.5mm and an inner diameter of 3mm. It is set 10mm away from the end of the cylindrical section away from the cone section, which can prevent the drive plate 9 from dislodging to the outside of the cylindrical section. When the traction force exceeds 8N, the drive plate can overcome the resistance of the limiting step and disengage (ensuring that the subsequent drive mechanism can move out smoothly).

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A urinary catheterization device, comprising a catheter and a guide cone, characterized in that: The guide cone is slidably disposed within the catheter. The guide cone includes a cylindrical section and a conical section integrally formed with the cylindrical section. The cylindrical and conical sections are provided with an interconnecting operating channel. The catheter also includes a drive mechanism disposed within the operating channel for horizontal movement of the guide cone within the catheter. The drive mechanism includes a drive end and a traction end. The drive end includes a drive disc and a traction wire fixed to the drive disc. The other end of the traction wire extends out of the catheter for driving operation. The drive disc is slidably disposed inside the guide cone. The operating channel is equipped with a limiting step to prevent the drive disc from dislodging. The traction end includes a traction disc fixed to the drive disc by a traction rod. The traction disc is slidably disposed in the operating channel at the tip of the conical segment. The conical segment is composed of multiple conical arc-shaped petals. Each conical arc-shaped petal is provided with an elastic sheet between itself and the cylindrical segment to restore itself to be parallel to the central axis of the cylindrical segment. A binding membrane is fixed to the outside of the traction disc to wrap and fix it to the outside of the tip of the conical segment. The fixing force between the binding membrane and the conical segment is greater than the restoring force of the elastic sheet.

2. The catheterization device according to claim 1, characterized in that: The conical arc-shaped lobes are provided in a total of 3-6 lobes and are evenly distributed on the circumference.

3. The catheterization device according to claim 1, characterized in that: The elastic sheet is a titanium alloy sheet or a spring steel sheet.

4. The catheterization device according to claim 1, characterized in that: The catheter is provided with a guide cone limiting platform to limit the guide cone to be located in the catheter orifice area. Under the action of the guide cone limiting platform, the drive mechanism can disengage from the limiting platform and exit the guide cone.

5. The catheterization device according to any one of claims 1-4, characterized in that: The catheter is equipped with a fixation balloon.

6. The catheterization device according to any one of claims 1-4, characterized in that: Multiple traction arms are provided on the circumference of the drive disk. The multiple traction arms extend radially toward the center of the drive disk and intersect with the fixed column provided at its center. A traction ring is provided on the fixed column. The traction steel wire is fixed to the traction ring. One end of the traction rod is fixed to the fixed column.

7. The catheterization device according to claim 6, characterized in that: The traction plate is provided with a connecting arm, and the other end of the traction rod is fixed to the connecting arm.

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