Catheter for preventing accidental removal

Abstract

The utility model discloses a kind of catheter of preventing accidental pulling out, it is related to medical instrument technical field, including insertion mechanism, the right side of insertion mechanism is provided with protection mechanism. In the use process of catheter, similar hook piece, hanging plate and limiting piece cooperate with each other, firmly connect insertion mechanism and protection mechanism, when patient accidentally pulls first catheter, similar hook piece flexible hooking place deformation, make first connecting piece and second connecting piece separate, avoid excessive pulling second catheter, protect urethra and surrounding structure, reduce patient pain, when accidentally pulling out tube, film plays a role, its cross-shaped opening allows urine to discharge when normal catheterization, close rapidly after pulling out tube, similar heart valve and bicycle valve core principle, prevent bacteria from entering urethra, reduce the risk of urinary system infection, beneficial to patient recovery, reduce medical cost.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a urinary catheter to prevent accidental removal. Background Technology

[0002] In the field of medical devices, urinary catheters, as an important tool to assist patients with difficulty urinating in draining urine, have been widely used in various medical scenarios.

[0003] However, accidental catheter removal is a common iatrogenic adverse event in clinical practice, with complex and diverse mechanisms, mainly involving the following three aspects: First, in terms of patient factors, patients in poor mental state (such as those with cognitive impairment, altered consciousness, or agitation) are highly likely to remove the catheter themselves unconsciously or in an emotionally unstable state. Second, in terms of nursing procedures, non-patient-initiated factors such as insecure catheter fixation (e.g., loose tape, malfunctioning fixator) and changes in patient position (e.g., traction during turning or moving) can also lead to accidental removal. Third, improper medical procedures (e.g., removing the catheter before the balloon is completely emptied) and product-related factors (e.g., balloon rupture, catheter breakage) are also important contributing factors.

[0004] Accidental extubation as described above can have serious clinical consequences: Because the urethral tissue is relatively fragile, external force can easily cause urethral mucosal tears and bleeding, and in severe cases, even urethral rupture. This not only causes severe pain for the patient but may also impair urination function and significantly increase the risk of urinary tract infections. More seriously, the resulting series of complications can prolong hospital stays, increase medical costs, and ultimately affect the patient's recovery process and quality of life. Utility Model Content

[0005] The purpose of this invention is to provide a catheter that prevents accidental removal, thereby solving the technical problem in the background art of how to effectively prevent the risks caused by accidental removal of traditional catheters.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a catheter to prevent accidental removal, comprising an insertion mechanism, with a protective mechanism on the right side of the insertion mechanism; the protective mechanism includes a second connector, a second catheter, a plug, a membrane, four fixing members, four limiting members, and four hanging plates; the second connector has an opening on its left side, the second catheter is disposed within the opening, the second catheter passes through the second connector, and the second catheter is detachably connected to the second connector; the plug is fixedly connected and communicates with the second catheter on its right side, and is fixedly connected to the second connector on its right side; the membrane is disposed on the right side of the inner wall of the plug, and is fixedly connected to the inner wall of the plug; the four limiting members are respectively fixedly connected to the right side of the four fixing members; the four hanging plates are respectively fixedly connected to the inner sides of the four fixing members and the four limiting members; the four fixing members and the four limiting members are all disposed within the opening; the four fixing members and the four limiting members are all fixedly connected to the inner wall of the second connector; the plug is disposed between the four hanging plates.

[0007] Preferably, the insertion mechanism includes a first catheter, a first connector, a plug, and four hook-like components. The first catheter passes through the first connector and is fixedly connected to the first connector. The right end of the first catheter is fixedly connected to and communicates with the left side of the plug. The plug is fixedly connected to the right side of the first connector. The four hook-like components are evenly distributed on the right side of the first connector and are all fixedly connected to the first connector. The plug is disposed between the four hook-like components.

[0008] Preferably, the plug mates with the insert, the plug is inserted into the insert, and the plug communicates with the insert.

[0009] Preferably, the four hook-like components can slide on the four hanging plates at their right-side bends, and can slide between the four hanging plates and the plug-in at their left-side edges.

[0010] Preferably, the four hook-like bends are all made of flexible material, and the film has a cross-shaped opening.

[0011] Preferably, the first urinary catheter is an external urinary catheter, and the second urinary catheter is fixedly connected to and communicates with the urinary catheter inside the patient's body.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. In this utility model, during implementation, the hook-like component cooperates with the hanging plate and limiting component to connect and fix the insertion mechanism and the protection mechanism, ensuring a firm and reliable fixation. When the patient accidentally pulls the first catheter, the flexible hook of the hook-like component deforms, allowing the first connecting component to smoothly and controllably detach from the second connecting component. This avoids excessive pulling on the second catheter, effectively preventing abnormal pulling force on the first catheter (external catheter) from being transmitted to the catheter inside the patient's body through the second catheter. This ensures that the catheter inside the patient's body is not pulled out and can always maintain a stable indwelling state, thereby effectively protecting the urethral mucosa, reducing the probability of serious injuries such as urethral mucosal tears, bleeding, and urethral rupture, effectively protecting the patient's urethra and surrounding anatomical structures, and reducing the patient's pain.

[0014] 2. In this invention, in the event of accidental removal of the catheter, the membrane of the catheter plays a crucial role in preventing infection. The cross-shaped opening on the membrane allows urine to drain smoothly during normal catheterization. When the first connector is accidentally pulled out, causing the first and second connectors to separate, the membrane quickly closes under its own elasticity, forming a physical barrier and immediately sealing the second catheter. This invention achieves triple protection through mechanical blocking: firstly, it immediately seals the catheter channel of the second catheter, preventing external bacteria and other pathogens from retrogradely invading the urethra; secondly, it avoids exposing the urethral mucosa to an open environment, reducing the risk of biofilm formation; and thirdly, it maintains the relative airtightness of the urinary system, buying time for subsequent treatment. Thus, it significantly reduces the risk of urinary tract infection, aids patient recovery, shortens hospital stays, and reduces medical costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the second connecting component mechanism of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the hook-like mechanism of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the hanging plate mechanism of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the thin film mechanism of this utility model.

[0020] In the diagram: 1. First catheter; 2. First connector; 3. Second connector; 4. Second catheter; 5. Hook-like component; 6. Plug; 7. Insert; 8. Membrane; 9. Fixing component; 10. Limiting component; 11. Hanging plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides, for example Figure 1-5 The illustrated catheter for preventing accidental removal includes an insertion mechanism and a protective mechanism detachably connected to the insertion mechanism on its right side. The protective mechanism includes a second connector 3, a second catheter 4, a plug 7, a membrane 8, four fixing members 9, four limiting members 10, and four hanging plates 11. The second connector 3 has an opening on its left side, within which the second catheter 4 is disposed. The second catheter 4 passes through the second connector 3 and is detachably connected to it. The plug 7 is fixedly connected to and communicates with the second catheter 4 on its right side, and is also fixedly connected to the second connector 3 on its right side. The membrane 8 is disposed on the right side of the inner wall of the plug 7 and is fixedly connected to the inner wall of the plug 7. The four limiting members 10 are fixedly connected to the right sides of the four fixing members 9, respectively. The four hanging plates 11 are fixedly connected to the inner sides of the four fixing members 9 and the four limiting members 10, respectively. All four fixing members 9 and four limiting members 10 are disposed within the opening on the left side of the second connector 3. The wall is fixedly connected, and the plug 7 is set between the four hanging plates 11; the insertion mechanism includes a first catheter 1, a first connector 2, a plug 6, and four hook-like parts 5. The first catheter 1 passes through the first connector 2 and is fixedly connected to the first connector 2. The right end of the first catheter 1 is fixedly connected to and communicates with the left side of the plug 6. The plug 6 is fixedly connected to the right side of the first connector 2. The four hook-like parts 5 are evenly distributed on the right side of the first connector 2 and are all fixedly connected to the first connector 2. The plug 6 is set between the four hook-like parts 5. The plug 6 cooperates with the plug 7 and is inserted into the plug 7. The plug 6 communicates with the plug 7. The right elbow of the four hook-like parts 5 can slide on the four hanging plates 11 respectively, and the left elbow of the four hook-like parts 5 can slide between the four hanging plates 11 and the plug 7. The elbows of the four hook-like parts 5 are all made of flexible material, and the membrane 8 has a cross-shaped opening. The first catheter 1 is an external catheter, and the second catheter 4 is fixedly connected to and communicates with the catheter inside the patient.

[0023] First, insert the hook-like component 5 into the second connector 3, ensuring that the right elbow of the hook-like component 5 is correctly aligned with the hanging plate 11. Next, rotate the first connector 2, causing the hook-like component 5, which is fixedly connected to it, to rotate on the hanging plate 11. During this process, the limiting component 10 and the hanging plate 11 will limit the hook-like component 5, preventing it from dislodging from its original position due to excessive rotation, ensuring a secure and reliable connection between the first connector 2 and the second connector 3. In summary, this completes the connection and fixation between the entire catheter insertion mechanism and the protection mechanism. In case of an accident, if the patient pulls on the first catheter 1, the first catheter 1 will move the first connector 2. Because the hook of the hook-like component 5 is made of a flexible material with a certain degree of toughness, the hook will deform under external force. This deformation allows the first connector 2 to detach smoothly from the second connector 3, preventing the catheter from being pulled out of the patient's body through the second catheter 4 due to direct pulling. This effectively protects the patient's urethra and surrounding anatomical structures, reducing the harm caused by accidental catheter removal. At the same time as the first connector 2 is pulled out, the membrane 8 on the inner wall of the insert 7 comes into play. The membrane 8 has a cross-shaped opening, and its working principle is similar to that of a heart valve and a bicycle valve core. During normal catheterization, urine can be smoothly discharged through the cross-shaped opening. When the first connector 2 is pulled out, the cross-shaped opening of the membrane 8 will quickly close under its own elasticity, sealing the second catheter 4 and preventing external bacteria and other pathogens from entering the urethra, thereby achieving a certain sealing effect and effectively reducing the risk of urethral infection.

[0024] Understandably, four fasteners 9 are evenly distributed circumferentially on the left side of the inner wall of the second connector 3, with their axes perpendicular to the central axis of the second connector 3. The outer ends of the fasteners 9 are fixedly connected to the inner wall of the second connector 3, and the inner ends extend towards the center. A limiting member 10 is fixedly connected to the right end face of each fastener 9. The limiting member 10 is a horizontally arranged rectangular block with its length direction perpendicular to the extension direction of the fastener 9. The distance between the inner edge of the limiting member 10 and the central axis of the second connector 3 is less than the distance between the inner edge of the fastener 9, forming a stepped limiting structure. Four hanging plates 11 are respectively horizontally connected between the inner ends of the fasteners 9 and the inner ends of the limiting members 10, forming four symmetrically distributed horizontal tracks. The upper surface of the mounting plate 11 is a smooth arc surface, and the lower surface is flush with the upper surface of the limiting member 10, forming a composite track structure of "upper arc-lower plane". The hook-like member 5 is an "L"-shaped flexible component, and the cross-section of its right bend (hook part) is semi-circular, matching the arc surface of the upper surface of the mounting plate 11. The width of the left rod part (connecting part) is slightly smaller than the gap between the mounting plate 11 and the plug 7 (about 1-2mm) to ensure free sliding. When the first connecting member 2 and the second connecting member 3 are not connected, the hook part of the hook-like member 5 is located at the outer end of the mounting plate 11 (near the opening of the second connecting member 3), the bottom surface of the hook part is in contact with the upper surface of the mounting plate 11, the rod part is located in the gap between the mounting plate 11 and the plug 7, and the plug 6 is aligned with the insertion hole of the plug 7. Initial alignment: Align the plug 6 of the first connector 2 with the insertion hole of the plug 7 inside the opening of the second connector 3, and simultaneously align the hook parts of the four hook-like parts 5 with the outer ends of the four mounting plates 11 respectively. Push the first connector 2 along the axial direction so that the plug 6 is inserted into the plug 7. At this time, the hook part of the hook-like part 5 slides into the upper surface arc of the mounting plate 11, and the rod part simultaneously enters the gap between the mounting plate 11 and the plug 7; Rotation locking: Rotate the first connector 2 clockwise (viewed from the right side), causing the hook-like parts 5 to rotate around the second connector 3. When the central axis of connector 3 rotates, the hook portion slides inward along the arc surface of the upper surface of the mounting plate 11. When it rotates about 45°, the semi-circular cross-section of the hook portion engages with the stepped groove formed by the mounting plate 11 and the limiting member 10 (the lower plane of the limiting member 10 and the lower surface of the mounting plate 11 form a limiting step). At this time, the rod portion of the hook-like component 5 is limited within the gap between the mounting plate 11 and the insert 7, and the inner edge of the hook portion fits against the outer end face of the limiting member 10, forming a circumferential limit and preventing the first connector 2 from moving axially (e.g., Figure 3 , Figure 4(As shown); When the patient accidentally pulls on the first catheter 1, the pulling force is transmitted to the rod of the hook-like part 5 through the first connector 2, causing the hook part to be subjected to an outward tangential force. Since the hook part is made of flexible material (such as medical-grade silicone or elastic plastic), when the pulling force exceeds the set threshold (about 5-8N, which can be adjusted by the material hardness), the hook part undergoes elastic deformation, the semi-circular cross section is slightly flattened, and the inner edge of the hook part is lifted upward, disengaging from the step limit of the limiting part 10. After the hook part disengages from the limiting step, the first connector 2 can be pulled out along the axial direction, and the plug 6 separates from the insert 7. At this time, the thin film 8 (cross-shaped opening) on ​​the inner wall of the insert 7 loses the support of the plug 6 and quickly closes under its own elastic action (similar to the passive closing mechanism of heart valves), sealing the outlet of the second catheter 4 and preventing external bacteria from entering (such as... Figure 5 (As shown).

[0025] In one embodiment, such as Figures 3 to 4 As shown, plug 6 is inserted into insert 7, thus the insertion mechanism and protective mechanism are detachably connected. Plug 6 and insert 7 communicate to form a channel for fluid passage. Understandably, plug 6 can be a tapered plug, and insert 7 has a matching interface for plug 6 to be inserted into, allowing medical personnel to perform blind insertion operations. The connection between plug 6 and insert 7 can be completed in just a few seconds (at which time the first and second catheters can be quickly assembled). Thus, the insertion mechanism (plug 6) can be replaced separately, avoiding the need for the entire catheter to be discarded. In the event of accidental catheter removal, the tapered scraping edge of plug 6 can also scrape away the biofilm on the inner wall of insert 7 during separation, reducing the risk of infection during re-insertion. Combined with the immediate closure of the membrane 8, a dynamic double-protection infection barrier is formed.

[0026] In another embodiment, when the plug 6 is a conical plug, the conical plug includes a main conical section, a transition section, and a sealing ridge connected in sequence. The main conical section is one end of the first catheter 1, and the sealing ridge is the end near the insert 7. The cross-sectional diameters of the main conical section, the transition section, and the sealing ridge gradually increase. Specifically, the cone angle of the main conical section can be set to 10°-14°, and at least three annular grooves are provided on the outer wall of the main conical section to disperse the compressive force when the plug 6 is inserted into the insert 7 and to form a progressive contact with the inner wall of the insertion interface of the insert 7 (the plug 6 can be made of medical-grade silicone, which has non-linear elastic characteristics and exhibits progressive deformation under pressure). The cone angle of the transition section can be set to 5°-7° to achieve smooth insertion into the insertion interface of the insert 7. A sealing ring is provided at the contact point between the sealing ridge and the insertion interface port to form an interference fit with the inner wall of the insert 7. Understandably, when the first catheter 1 and the second catheter 4 are assembled and connected, the annular grooves on the outer wall of the main conical segment can disperse the compressive force when the plug 6 is inserted into the insert 7, preventing excessive local stress caused by force concentration between the plug 6 and the insert 7. Because the plug is made of medical-grade silicone, which has non-linear elastic properties, the inner wall of the interface between the main conical segment and the insert 7 can form a progressive contact, exhibiting progressive deformation under pressure. This characteristic allows the plug 6 to better adapt to the shape of the insert 7, thereby improving the connection between the first catheter 1 and the second catheter 4. For stability, the cone angle of the transition section is set to less than 5°-7°. The smaller cone angle allows the plug 6 to be inserted more smoothly into the insertion interface of the plug 7, reducing resistance during the insertion process and facilitating quick assembly by medical staff. The sealing ridge forms an interference fit with the inner wall of the plug 7 to prevent urine leakage. The sealing ring set at the contact point between the sealing ridge and the port of the insertion interface further enhances the sealing effect. When the patient's position changes, such as turning over 30°-90°, the sealing ridge can maintain the integrity of the seal and ensure that the catheter will not leak urine due to changes in position.

[0027] In the event of accidental removal of the catheter (dissociation of the first catheter 1 and the second catheter 4), the annular groove of the main conical segment begins to detach from the inner wall of the insert 7 in stages. The detachment process of each groove is accompanied by elastic deformation of the silicone and frictional work, converting some of the pulling energy into heat dissipation, thereby reducing the impact on the second catheter 4 during removal and protecting the urethral mucosa. Preferably, the transition section can adopt a hardness gradient control design, that is, the hardness of the outer section of the transition section near the first catheter 1 is set to be lower (the hardness should meet actual needs). In the event of accidental pulling of the catheter, the outer section breaks first, while the inner section near the second catheter 4 (the length of the inner section is set to be much smaller than the outer section) remains intact, preventing external bacteria and other pathogens from retrogradely invading the urethra. Simultaneously, when the outer conical surface of the transition section breaks and separates, its microstructure shears against the biofilm on the inner wall of the insert 7, further scraping away some of the biofilm and reducing biofilm residue.

[0028] In one embodiment, such as Figure 2 and Figure 3 As shown, the four hook-like components 5 are all made of flexible material at their bends, and the film 8 has a cross-shaped opening. Understandably, the flexible material of the hook-like components 5 allows them to better adapt to the shape of the mounting plate 11 during the insertion of the plug 6 and insert 7, facilitating the connection and fixation of the insertion mechanism and the protective mechanism by medical personnel. When it is necessary to change the catheter or perform other operations, the flexible hook-like components 5 can also be easily detached from the mounting plate, allowing medical personnel to quickly disassemble and replace the first catheter 1. The flexible material at the bends of the hook-like components 5 enables controllable detachment through flexible deformation. When the first catheter is accidentally pulled, the flexible hook will deform, allowing the first connector 2 to detach smoothly from the second connector 3, preventing the pulling force from being directly transmitted to the second catheter 4 due to a rigid connection. This avoids excessive pulling on the catheter inside the patient's body, protects the urethral mucosa, and reduces the probability of serious injuries such as urethral mucosal tears, bleeding, and urethral rupture. Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A urinary catheter designed to prevent accidental removal, characterized in that: Includes an insertion mechanism, and a protective mechanism is provided on the right side of the insertion mechanism; The protective mechanism includes a second connector (3), a second catheter (4), a plug (7), a membrane (8), four fixing parts (9), four limiting parts (10), and four hanging plates (11). The second connector (3) has an opening on its left side, and the second catheter (4) is placed in the opening. The second catheter (4) passes through the second connector (3) and is detachably connected to the second connector (3). The right side of the plug (7) is fixedly connected to and communicates with the second catheter (4). The right side of the plug (7) is fixedly connected to the second connector (3). The membrane... (8) is located on the right side of the inner wall of the plug (7). The film (8) is fixedly connected to the inner wall of the plug (7). The four limiting members (10) are fixedly connected to the right side of the four fixing members (9). The four hanging plates (11) are fixedly connected to the inner side of the four fixing members (9) and the inner side of the four limiting members (10). The four fixing members (9) and the four limiting members (10) are all located in the opening. The four fixing members (9) and the four limiting members (10) are all fixedly connected to the inner wall of the second connecting member (3). The plug (7) is located between the four hanging plates (11).

2. The urinary catheter for preventing accidental removal according to claim 1, characterized in that: The insertion mechanism includes a first catheter (1), a first connector (2), a plug (6), and four hook-like components (5). The first catheter (1) passes through the first connector (2) and is fixedly connected to the first connector (2). The right end of the first catheter (1) is fixedly connected to and communicates with the left side of the plug (6). The plug (6) is fixedly connected to the right side of the first connector (2). The four hook-like components (5) are evenly distributed on the right side of the first connector (2). All four hook-like components (5) are fixedly connected to the first connector (2). The plug (6) is disposed between the four hook-like components (5).

3. The urinary catheter for preventing accidental removal according to claim 2, characterized in that: The plug (6) cooperates with the plug (7), the plug (6) is inserted into the plug (7), and the plug (6) communicates with the plug (7).

4. The urinary catheter for preventing accidental removal according to claim 3, characterized in that: The four hook-like parts (5) can slide on the four hanging plates (11) at the right elbow, and the four hook-like parts (5) can slide between the four hanging plates (11) and the plug-in (7) at the left.

5. The urinary catheter for preventing accidental removal according to claim 3, characterized in that: The bends of the four hook-like parts (5) are all made of flexible material, and the film (8) has a cross-shaped opening.

6. The urinary catheter for preventing accidental removal according to claim 3, characterized in that: The first catheter (1) is an external catheter, and the second catheter (4) is fixedly connected to and communicates with the internal catheter of the patient.

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