Hemodialysis catheter fixing device

Abstract

The invention discloses a hemodialysis catheter fixing device which comprises a bottom plate, an arm fixing device is installed on the bottom plate, the arm fixing device comprises a first screw arranged on the bottom plate, guide rails are installed on the two sides of the first screw, the thread turning directions of the two ends of the first screw are opposite, and the two ends of the first screw are sleeved with sliding blocks; a lead screw nut structure is formed between the first screw rod and the sliding block, a clamping piece is installed on the sliding block, and a guide pipe fixing device is installed on the clamping piece. Through the innovative structural design, the stability of catheter fixing is remarkably improved; a plurality of fixing structures are adopted, skin curves of different patient body types can be attached, external stress of the catheter is effectively dispersed, catheter displacement or slippage caused by limb movement or accidental traction is avoided, and the secondary catheter indwelling risk is reduced; and the structure can be quickly adjusted to adapt to different catheterization positions, so that medical staff can conveniently adjust the catheter, and clinical application scenes are expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of hemodialysis catheter fixation, and particularly relates to a hemodialysis catheter fixation device. Background Art

[0002] In hemodialysis treatment, the safe fixation of the catheter is a key link to avoid displacement, detachment or infection. Traditional fixation methods mostly rely on suturing the catheter to the skin with sutures (such as button suture technique), or using medical tapes and elastic bandages for auxiliary fixation. However, the suture operation has the risk of stabbing, which may cause local bleeding or infection, and long-term indwelling will cause skin traction pain; tape fixation is easily affected by patient movement, sweating or skin oil, resulting in problems such as decreased adhesion and catheter sliding, especially for parts with a large body surface curvature (such as the neck and groin), and the fitting effect is poor.

[0003] In existing improved solutions, some patents and products attempt to enhance the fixation effect through elastic straps, adjustable buckles or adhesive bases. However, for the problem of uneven pressure distribution among patients with different body types, existing devices generally lack a dynamic adjustment mechanism, and long-term compression may cause skin damage; in addition, the existing technology has insufficient protection mechanism for accidental catheter traction, and still relies on medical staff to manually reset in case of emergency.

[0004] In summary, the existing catheter fixation devices still have deficiencies in terms of safety and intelligent protection, and there is an urgent need for a comprehensive solution that can adapt to complex body surface shapes and adjust the fixation pressure in real time. Summary of the Invention

[0005] In order to at least solve or partially solve the above problems, a hemodialysis catheter fixation device is provided.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A hemodialysis catheter fixation device of the present invention includes a bottom plate, and an arm fixation device is installed on the bottom plate. The arm fixation device includes a first screw disposed on the bottom plate. Guide rails are installed on both sides of the first screw. The thread directions at both ends of the first screw are opposite. Sliders are sleeved on both ends of the first screw. A screw-nut structure is formed between the first screw and the sliders. A clamping member is installed on the slider, and a catheter fixation device is installed on the clamping member.

[0008] As a preferred technical solution of the present invention, the catheter fixing device includes a fixing seat connected to the clamping member. An accommodation cavity is installed inside the fixing seat. An arched slider is installed inside the accommodation cavity. The bottom of the accommodation cavity is arc-shaped. A catheter is placed inside the accommodation cavity. A second screw is installed on the arched slider. The second screw and the arched slider form a screw-nut structure. The second screw penetrates through the fixing seat and extends outward.

[0009] As a preferred technical solution of the present invention, locking structures are installed at one ends of the first screw and the second screw respectively.

[0010] As a preferred technical solution of the present invention, the locking structure includes a sleeve sleeved on the screw. A friction plate is installed inside the sleeve. The sleeve is connected to the screw through the friction plate. The screw and the sleeve can only move relative to each other but cannot rotate relative to each other through the friction plate. One end of the sleeve is connected to a connecting rod. A plug pin is installed at the other end of the connecting rod. Slots are respectively arranged on the arm fixing device and the catheter fixing device.

[0011] As a preferred technical solution of the present invention, the cross-sections of the slots and the plug pins are the same. The slots are respectively arranged on the clamping member and the bottom plate. The first screw is connected to the bottom plate through the locking structure. The second screw is connected to the clamping member through the locking structure.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] Through the innovative structural design, the present invention significantly improves the stability of catheter fixation;

[0014] By adopting multiple fixing structures, it can fit the skin curves of different patient body types, effectively disperse the external force on the catheter, avoid catheter displacement or slippage caused by limb movement or accidental pulling, and reduce the risk of secondary catheterization;

[0015] The quick adjustment structure can adapt to different catheterization sites, facilitate adjustment by medical staff, expand the clinical application scenarios, and complete disinfection or dressing change without disturbing the catheter, improving the nursing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0017] Figure 1 is the overall structural schematic diagram of the present invention;

[0018] Figure 2 is the overall structural schematic diagram of the catheter fixing device of the present invention;

[0019] Figure 3 is a sectional view of the catheter fixing device of the present invention;

[0020] Figure 4 is a schematic diagram of the overall structure of the sleeve of the present invention;

[0021] In the figure: 1, bottom plate; 2, arm fixing device; 3, first screw; 4, guide rail; 5, slider; 6, clamping member; 7, catheter fixing device; 8, fixing seat; 9, accommodation cavity; 10, arched slider; 11, catheter; 12, second screw; 13, locking structure; 14, sleeve; 15, friction plate; 16, connecting rod; 17, plug; 18, slot. Specific Embodiments

[0022] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0023] In addition, if the detailed description of the known technology is unnecessary for showing the features of the present invention, it will be omitted.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] Embodiment 1

[0027] AsFigures 1-4 As shown in the figure, the present invention provides a blood dialysis catheter fixing device, which includes a bottom plate 1. An arm fixing device 2 is installed on the bottom plate 1. The arm fixing device 2 includes a first screw rod 3 arranged on the bottom plate 1. Guide rails 4 are installed on both sides of the first screw rod 3. The thread directions at both ends of the first screw rod 3 are opposite. Sliders 5 are sleeved on both ends of the first screw rod 3. A lead screw-nut structure is formed between the first screw rod 3 and the sliders 5. A clamping member 6 is installed on the slider 5, and a catheter fixing device 7 is installed on the clamping member 6.

[0028] Specifically, when in use, place the patient's arm in the center of the clamping member 6, and rotate the first screw rod 3. A lead screw-nut structure is formed between the first screw rod 3 and the sliders 5. When the first screw rod 3 rotates, it will drive the sliders 5 to move on the guide rails 4. Since the thread directions at both ends of the first screw rod 3 are opposite, therefore, the clamping member 6 will move inwards or outwards simultaneously. Moving inwards simultaneously will clamp the patient's arm, and moving outwards simultaneously will loosen it. Then, the catheter is fixed by the catheter fixing device 7.

[0029] The catheter fixing device 7 includes a fixing seat 8 connected to the clamping member 6. An accommodation cavity 9 is installed inside the fixing seat 8. An arched slider 10 is installed inside the accommodation cavity 9. The bottom of the accommodation cavity 9 is arc-shaped. A catheter 11 is placed inside the accommodation cavity 9. A second screw rod 12 is installed on the arched slider 10. A lead screw-nut structure is formed between the second screw rod 12 and the arched slider 10. The second screw rod 12 penetrates through the fixing seat 8 and extends outwards.

[0030] The catheter 11 is placed in the accommodation cavity 9 inside the catheter fixing device 7. When adjusting the catheter, the second screw rod 12 can be rotated. A lead screw-nut structure is formed between the second screw rod 12 and the arched slider 10. When the second screw rod 12 rotates, it will drive the arched slider 10 to move along the direction of the second screw rod 12, thereby squeezing the catheter to achieve fixation. When the catheter needs to be taken out, the second screw rod 12 is rotated in the reverse direction to make the arched slider 10 move upwards, and then the catheter is taken out.

[0031] In order to prevent the first screw rod 3 and the second screw rod 12 from sliding due to inertia during fixation, thereby affecting the original fixation effect, locking structures 13 are installed at one end of each of the first screw rod 3 and the second screw rod 12.

[0032] The locking structure 13 includes a sleeve 14 sleeved on the screw rod. A friction plate 15 is installed inside the sleeve 14. The sleeve 14 is connected to the screw rod through the friction plate 15. The screw rod and the sleeve 14 can only move relative to each other and cannot rotate relative to each other through the friction plate 15. One end of the sleeve 14 is connected to a connecting rod 16.

[0033] One end of the locking structure 13 is connected to the screw through the sleeve 14, and the other end of the locking structure 13 is fixed. Since the friction plate 15 is installed inside the sleeve 14, the screw can only move relative to the sleeve 14 but cannot rotate relative to it. Therefore, when the screw rotates, it will drive the sleeve 14 to rotate, while the other end of the locking structure 13 is fixed. Therefore, the screw cannot rotate.

[0034] Fixing is achieved by using a slot and a pin. A pin 17 is installed at the other end of the connecting rod 16. Slots 18 are respectively provided on the arm fixing device 2 and the catheter fixing device 7. The cross-sections of the slots 18 and the pin 17 are the same. The slots 18 are respectively provided on the clamping member 6 and the bottom plate 1. The first screw 3 is connected to the bottom plate 1 through the locking structure 13, and the second screw 12 is connected to the clamping member 6 through the locking structure 13. In this way, the screw can be fixed and cannot rotate.

[0035] Through innovative structural design, the present invention significantly improves the stability of catheter fixation;

[0036] By adopting multiple fixing structures, it can conform to the skin curves of different patient body types, effectively disperse the external force on the catheter, avoid catheter displacement or slippage caused by limb movement or accidental pulling, and reduce the risk of secondary catheterization;

[0037] The quick adjustment structure is adapted to different catheterization sites, facilitating adjustment by medical staff, expanding the clinical application scenarios, and completing disinfection or dressing change without disturbing the catheter, thus improving the nursing efficiency.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hemodialysis catheter fixing device, characterized in that: The invention comprises a base plate (1), an arm fixing device (2) being installed on the base plate (1), the arm fixing device (2) comprising a first screw rod (3) arranged on the base plate (1), guide rails (4) being installed on both sides of the first screw rod (3), the threads at both ends of the first screw rod (3) being screwed in opposite directions, sliders (5) being sleeved on both ends of the first screw rod (3), a screw nut structure being formed between the first screw rod (3) and the slider (5), a clamping member (6) being installed on the slider (5), and a catheter fixing device (7) being installed on the clamping member (6).

2. A hemodialysis catheter fixing device according to claim 1, characterized in that: The catheter fixing device (7) comprises a fixing seat (8) connected to a clamping member (6); a receiving cavity (9) is installed on the inner side of the fixing seat (8); an arched slider (10) is installed on the inner side of the receiving cavity (9); the bottom of the receiving cavity (9) is in an arc shape; a catheter (11) is placed on the inner side of the receiving cavity (9); a second screw rod (12) is installed on the arched slider (10); the second screw rod (12) and the arched slider (10) form a screw nut structure; the second screw rod (12) passes through the fixing seat (8) and extends outward.

3. A hemodialysis catheter fixing device according to claim 2, characterized in that: One end of each of the first screw rod (3) and the second screw rod (12) is provided with a locking structure (13).

4. A hemodialysis catheter fixing device according to claim 3, characterized in that: The locking structure (13) comprises a sleeve (14) sleeved with a screw rod, a friction plate (15) is installed on the inner side of the sleeve (14), the sleeve (14) is connected to the screw rod via the friction plate (15), the screw rod can only move relative to the sleeve (14) via the friction plate (15) but cannot rotate relative to the sleeve (14), one end of the sleeve (14) is connected to a connecting rod (16), the other end of the connecting rod (16) is installed with a latch (17), and slots (18) are respectively provided on the arm fixing device (2) and the catheter fixing device (7).

5. A hemodialysis catheter fixing device according to claim 1, characterized in that: The slot (18) has the same cross-section as the latch (17); the slot (18) is respectively arranged on the clamp (6) and the base plate (1); the first screw rod (3) is connected to the base plate (1) via a locking structure (13); and the second screw rod (12) is connected to the clamp (6) via a locking structure (13).

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