Catheter fixing device for interventional therapy

Abstract

The utility model relates to a catheter fixing device for interventional therapy, which comprises an outer shell, the inner left side and the inner right side of the outer shell are respectively and rotatably connected with a driven tube, the outer sides of the two driven tubes are respectively in key connection with a clamping plate I and a clamping plate II, and movable grooves convenient for the clamping plate I and the clamping plate II to rotate are arranged on the outer shell aiming at the clamping plate I and the clamping plate II. At the moment, by matching with the characteristics that the vertical layer surface of the clamping plate I is of an inverted L-shaped structure and the vertical layer surface of the clamping plate II is of an L-shaped structure, the catheter and corresponding solid substances can be fixed by shortening the distance between the clamping plate I and the end face of the outer shell in the using process, and it can be guaranteed that the position of the catheter cannot deviate in the actual using process.

Description

Technical Field

[0001] This utility model relates to the field of fixation device technology, and in particular to a catheter fixation device for interventional therapy. Background Technology

[0002] Interventional radiology, also known as interventional therapy, is a rapidly developing new discipline that integrates imaging diagnosis and clinical treatment. It encompasses a series of techniques that utilize needles, catheters, and other interventional devices to deliver specific instruments to the affected area through natural body cavities or tiny incisions for minimally invasive treatment. In interventional treatment of tumors, indwelling catheter placement is frequently employed.

[0003] Once the catheter is inserted into the body, it needs to be secured. Currently, there are generally two methods for securing the catheter. One method is to use a support frame placed on the side of the bed to secure the catheter. The other method is to use a restraint strap to bind the catheter to the patient's arm or other limbs to secure the catheter.

[0004] In practical use, we found that using a support frame requires a lot of medical space. In practice, medical staff often need to manually move the support frame when operating on patients. This process is not only troublesome, but it also makes the already narrow ward space even more cramped. Using restraint straps for fixation is not stable. During use, it is very easy for family members to accidentally touch it due to their concern for the patient.

[0005] Therefore, we believe there is a need for a smaller catheter fixation device for interventional treatment that can make full use of the hospital bed or the surrounding fixtures, such as using the bed handles or bedside table legs to fix the catheter. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention proposes a catheter fixation device for interventional therapy, which has the advantages of occupying little space and being easy to operate, and solves the disadvantages of existing devices that are easily accidentally touched or require a lot of space and are not easy to use.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A catheter fixation device for interventional therapy includes an outer shell. Inside the outer shell, a driven tube is rotatably connected in parallel on both the left and right sides, extending along the front and rear axes. A clamping plate II, with a vertically L-shaped structure in its projection, is keyed to each axial end of the driven tube on the left side. A clamping plate I, with a vertically inverted L-shaped structure in its projection, is keyed to each axial end of the driven tube on the right side. Movable grooves are provided on the outer shell for clamping plates I and II. A follower gear is coaxially fixedly connected to each driven tube, and a ratchet is meshed with one side of the follower gear. The outer shell contains an inner shell, with a pin rotatably connected to its front and rear sides. Each pawl has a through hole I for the pin, and the pin is inserted into the adjacent through hole I. The pin and the pawl are coaxially and fixedly connected. A cam is fitted on the outer side of the middle section of each pin, and the cam is coaxially and fixedly connected to the pin. The distance between the lower end of the cam and the central axis of the pin is greater than the distance between the upper end of the pawl and the central axis of the pin. A stop is provided on one side of the lower end of each cam, and the stop is located in the inner shell and slidably connected to the inner shell.

[0009] Preferably, the inner housing is rotatably connected to a driven gear in the upper and lower axial directions. The driven gear is located between two stops. The two stops are located near the ends of two pins. A rack is fixedly connected to the near ends of the two stops. The rack meshes with the driven gear for transmission. The outer housing is provided with a through hole II in the front and rear axial directions. A limit rod is inserted into the through hole II. The middle section of the limit rod is in the shape of a rack. The middle section of the limit rod is inserted into the inner housing and meshes with the driven gear for transmission. A through groove is provided on the inner housing for the limit rod.

[0010] Preferably, a limiting ring is sleeved on the outer side of one axial end of the limiting rod, and a compression spring is provided between the limiting ring and the inner wall of the outer shell. The compression spring is sleeved on the outer side of the limiting rod, and the two axial ends of the compression spring abut against the limiting ring and the inner wall of the outer shell, respectively. When the compression spring is not affected by external force, the stop block abuts against the cam.

[0011] Preferably, the front end of the limiting rod protrudes from the outer shell, and when the limiting rod moves backward along its axial end, the distance between the stop block and the cam increases. A pressing plate is fixedly connected to the front end of the limiting rod, and the diameter of the pressing plate is not less than two centimeters.

[0012] Preferably, each of the stops has an internal threaded hole at its lower end, and each of the stops has a limiting plate at its lower end. The limiting plate has a through hole III, which corresponds one-to-one with the internal threaded hole. Each through hole III and the corresponding internal threaded hole are screwed together with a bolt. Furthermore, each limiting plate is located outside the inner housing, and the inner housing has a groove for the bolt to pass through.

[0013] Preferably, each of the outer casings is provided with a plurality of clamping plates I and a plurality of clamping plates II, and the plurality of clamping plates I and the plurality of clamping plates II are connected together to the corresponding driven tube key.

[0014] Preferably, each of the clamping plates I and each of the clamping plates II is fixedly connected to a damping pad on its inner side, and the damping pad is provided with an anti-slip groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention utilizes clamps I and II, which are slidably connected to the outer casing. By employing the unique structural features of clamps I and II, the distance between them and the end face of the outer casing can be shortened during use, thus securing the conduit and the corresponding solid material. This ensures that the conduit will not shift position during actual use. Simultaneously, a stop block in conjunction with a cam can also fix the rotation direction of clamps I and II, preventing the distance between them and the end face of the outer casing from increasing during actual use. Attached Figure Description

[0017] Figure 1 The schematic diagram of the overall structure of this utility model is not shown.

[0018] Figure 2 This is a schematic diagram of the internal structure of the outer shell of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the inner shell of this utility model.

[0020] Figure 4 This is a schematic diagram showing the positional relationship between the stop block and the limiting plate of this utility model.

[0021] Figure 5 This is a schematic diagram showing the positional relationship between the rack and the limiting rod of this utility model.

[0022] In the diagram: 1. Outer shell; 2. Clamping plate I; 3. Movable groove; 4. Clamping plate II; 5. Pressing plate; 6. Limiting rod; 7. Inner shell; 8. Driven tube; 9. Follower gear; 10. Damping pad; 11. Pawl; 12. Pin; 13. Stop block; 14. Rack; 15. Slide groove; 16. Limiting plate; 17. Bolt; 18. Cam; 19. Driven gear; 20. Compression spring; 21. Through groove. Detailed Implementation

[0023] 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.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Please refer to Figure 1 A catheter fixation device for interventional therapy includes an outer shell 1, with a hollow catheter disposed on the lower side of the outer shell 1. Furthermore, a movable groove 3 is formed on both the front and rear sides of the upper end of the outer shell 1, and a clamping plate Ⅰ2 is inserted into the movable groove 3.

[0026] Furthermore, the lower end of clamp I2 is embedded inside the outer shell 1 and rotatably connected to the outer shell 1. This allows the device to be rotated in practice by rotating clamp I2 in conjunction with the upper surface of the outer shell 1. Utilizing the characteristic that the vertical surface of clamp I2 is an inverted L-shaped structure, the distance between the inner side of clamp I2 and the upper surface of the outer shell 1 can be changed. At this time, it is only necessary to control clamp I2 to prevent it from rotating in the opposite direction to increase the distance between it and the upper surface of the outer shell 1, so that the device, i.e., the outer shell 1, can be fixed in a specific position to achieve the fixation of the conduit position.

[0027] Correspondingly, such as Figure 2 As shown, a movable groove 3 is also provided on the front and rear sides of the lower end of the outer shell 1. A clamping plate II 4 with an L-shaped structure in vertical projection is inserted into the movable groove 3. The upper end of the clamping plate II 4 is embedded in the outer shell 1 and rotatedly connected to the outer shell 1. At this time, if the clamping plate I 2 is the same, the distance between its inner side and the lower end face of the outer shell 1 can be reduced by rotating the clamping plate II 4. The clamping plate II 4 is restricted from being reversed to increase the distance between it and the lower end face of the outer shell 1. The position of the conduit can be fixed by using the clamping plate II 4.

[0028] It should be noted that the size of clamp II4 should be smaller than that of clamp I2. This is mainly to accommodate the actual size of catheters and other fixed items in the ward, ensuring that the device has a relatively large applicability. At the same time, by separately constraining clamp I2 and clamp II4 to the left and right sides of the outer shell 1, this allows the catheter fixed by clamp II4 to be positioned relatively in the middle of the outer shell 1, thus preventing the catheter from being located at the edge of the outer shell 1 and being scraped or displaced.

[0029] Correspondingly, setting two clamping plates I2 and II4 together can avoid the lack of sufficient constraint effect caused by single-point fixation in actual use, and fully prevent the outer shell 1 and the conduit from shifting or rotating.

[0030] Furthermore, the device is equipped with damping pads 10 on the inner sides of both clamping plate I2 and clamping plate II4, and damping grooves are provided on the inner sides of the damping pads 10. This increases the friction and avoids hard contact.

[0031] Specifically, such as Figure 2 , Figure 3 As shown, the device has a driven tube 8 on each of the left and right sides inside the outer shell 1. The two driven tubes 8 correspond to the clamping plate I2 and clamping plate II4 respectively. The driven tubes 8 are keyed to the corresponding clamping plate I2 or clamping plate II4. Furthermore, the axial end of the driven tube 8 is rotatably connected to the outer shell 1 through bearing I, which can realize the rotatable connection between clamping plate I2 and clamping plate II4 and the outer shell 1.

[0032] Meanwhile, to ensure that the driven tube 8, i.e., clamp I2 or clamp II4, can only rotate in one direction during actual use, the device is coaxially fixedly connected to the outside of each driven tube 8. A pawl 11 is meshed and connected to one side of the driven gear 9. At this time, it is only necessary to control the pawl 11 to rotate in one direction to realize the unidirectional rotation of the driven tube 8, i.e., clamp I2 and clamp II4. This makes it possible for clamp I2 and clamp II4 to shorten the distance between their inner side and the outer shell 1 by rotation in actual use.

[0033] Specifically, this device has an inner shell 7 located on the upper inner side of the outer shell 1. Pins 12 are rotatably connected to the left and right sides of the inner shell 7, and the pins 12 on the left and right sides correspond to the pawls 11 on the two sides. Therefore, each pawl 11 of this device has a through hole I, and the pin 12 is inserted into the corresponding through hole I.

[0034] It should be noted that each pin 12 is fitted with a corresponding spring on the part outside the inner housing 7. The two axial ends of the spring abut against the corresponding pawl 11 and the side end face of the inner housing 7, respectively. This is mainly to facilitate the installation between the pawl 11 and the pin 12. In practice, the key connection between the pawl 11 and the pin 12 can be easily achieved by using the larger diameter of the ends of the pawl 11 and the pin 12. At this time, the pawl 11 and the pin 12 can be regarded as a coaxial fixed connection.

[0035] Correspondingly, each pin 12 is also coaxially fixedly connected to a cam 18 in the middle section. The cam 18 is located in the inner housing 7. By restricting the rotation of the cam 18, the pin 12 can be restricted, thereby constraining the unidirectional rotation direction of the pawl 11.

[0036] Therefore, the distance between the lower end of the constrained cam 18 and the central axis of the pin 12 is greater than the distance between the upper end of the pawl 11 and the central axis of the pin 12. Furthermore, a stop block 13 is provided on the lower end of one side of each cam 18. The stop block 13 is located in the inner housing 7 and is slidably connected to the inner housing 7. At this time, the cam 18 can achieve the effect of constraining the rotation direction of the cam 18.

[0037] It should be emphasized that, in practice, since clamping plates I2 and II4 are located on the left and right sides of the outer shell 1 respectively, in order to maximize the utilization of the outer shell 1, the L-shaped openings of clamping plates I2 and II4 must be set opposite to each other. Therefore, in practice, without involving external force adjustment, clamping plates I2 and II4 rotate in opposite directions. Only then can clamping plates I2 and II4 freely shorten the distance between themselves and the outer shell 1.

[0038] Therefore, the two stops 13 are located at the near ends of the two pins 12 respectively.

[0039] It should be noted that, as Figure 4 As shown, each stop 13 is provided with a limiting plate 16 at its lower end. A through hole Ⅲ is provided through the limiting plate 16. Furthermore, each stop 13 is provided with an internal threaded hole at its lower end. The through hole Ⅲ corresponds one-to-one with the internal threaded hole. At this time, only one bolt 17 needs to be screwed into each through hole Ⅲ and the corresponding internal threaded hole. Thus, while constraining each limiting plate 16 to be located outside the inner shell 7 and there is a gap between the stop 13 and the limiting plate 16, the sliding connection between the stop 13 and the inner shell 7 can be achieved by using the sliding groove 15 on the inner shell 7 for the bolt 17 to pass through.

[0040] It should be noted that in practice, when the pawl 11 rotates clockwise, it causes the driven tube 8 to rotate counterclockwise (taking the left cam 18 as an example). Utilizing the inclined surface of the contact between the stop block 13 and the cam 18, the cam 18 will apply a downward thrust to the stop block 13. At this time, part of the thrust is decomposed into a horizontal thrust on the stop block 13 towards the driven gear 19. Therefore, in practice, the distance between the limiting plate 16 and the stop block 13 needs to be limited to ensure sufficient friction.

[0041] Specifically, such as Figure 2 , Figure 3 , Figure 5 As shown, a driven gear 19 with vertical axial direction is provided between the two stop blocks 13. The two axial ends of the driven gear 19 are rotatably connected to the inner housing 7 through bearings II. At this time, by fixing a rack 14 to the near end of each of the two stop blocks 13, and constraining the rack 14 to mesh with the driven gear 19 for transmission, the two racks 14 can be driven by rotating the driven gear 19, that is, the two stop blocks 13 can be driven to rotate in the same direction, thereby releasing the restriction on the rotation direction of the cam 18.

[0042] Meanwhile, in order to facilitate the rotation of the driven gear 19, the device also has a through hole II in the outer shell 1 with a front-to-back axial direction. A limit rod 6 is inserted into the through hole II. The middle section of the limit rod 6 is in the shape of a rack. The middle section of the limit rod 6 is inserted into the inner shell 7 and meshes with the driven gear 19 for transmission. A through groove 21 is provided on the inner shell 7 for the limit rod 6. At this time, the user can control the rotation of the driven gear 19 by pressing the limit rod 6.

[0043] Correspondingly, the device also constrains the front end of the limiting rod 6 to protrude from the outer shell 1, and when the limiting rod 6 moves backward along its axial end, the distance between the stop block 13 and the cam 18 increases. This ensures that the user can control the position of the stop block 13 by pressing the limiting rod 6.

[0044] Furthermore, the device also has a pressing plate 5 fixedly connected to the front end of the limiting rod 6, which constrains the diameter of the pressing plate 5 to be no less than two centimeters, thereby making it easier for the user to press the limiting rod 6.

[0045] Furthermore, this device has a limiting ring sleeved on the outer side of one axial end of the limiting rod 6. A compression spring 20 is provided between the limiting ring and the inner wall of the outer shell 1. The compression spring 20 is sleeved on the outer side of the limiting rod 6, and the two axial ends of the compression spring 20 abut against the limiting ring and the inner wall of the outer shell 1, respectively. At this time, by constraining the compression spring 20, when it is not affected by external force, the stop block 13 abuts against the cam 18 to realize the automatic reset of the position of the limiting rod 6, so that when the limiting rod 6 is not affected by external force, the stop block 13 can form a position constraint on the cam 18.

[0046] In practical use, this utility model:

[0047] First, the user presses the limit rod 6, compresses the spring 20 to accumulate elastic potential energy, and the stop block 13 releases the position constraint on the cam 18. At this time, the distance between the inner side of the clamping plate I2 and the clamping plate II4 and the outer shell 1 is increased.

[0048] Then, the user releases the constraint on the limit rod 6, the compression spring 20 returns to its original position, and the stop block 13 re-engages with the cam 18;

[0049] Afterwards, the user places the catheter inside the two clamps II4 and simultaneously overlaps clamp I2 in a suitable and fixed position;

[0050] Finally, rotate clamp I2 and clamp II4 so that the side end of the conduit and the corresponding fixed item abut against the side end of the outer shell 1. At this point, the fixing is complete.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An interventional catheter fixation device, characterized by: The enclosure includes an outer shell (1), inside which a driven tube (8) is rotatably connected in parallel on the left and right sides. A clamping plate II (4) with an L-shaped vertical projection is keyed to the two axial ends of the driven tube (8) on the left side, and a clamping plate I (2) with an inverted L-shaped vertical projection is keyed to the two axial ends of the driven tube (8) on the right side. Movable grooves (3) are provided on the outer shell (1) for the clamping plates I (2) and II (4). A follower gear (9) is coaxially fixedly connected to each driven tube (8), and a ratchet (11) is meshed and driven on one side of the follower gear (9). An inner shell (7) is provided inside the outer shell (1). A pin (12) is rotatably connected to each of the front and rear sides. Each pawl (11) has a through hole I for the pin (12). The pin (12) is inserted into the adjacent through hole I. The pin (12) and the pawl (11) are coaxially fixedly connected. A cam (18) is sleeved on the outer side of the middle section of each pin (12). The cam (18) is coaxially fixedly connected to the pin (12). The distance between the lower end of the cam (18) and the central axis of the pin (12) is greater than the distance between the upper end of the pawl (11) and the central axis of the pin (12). A stop (13) is provided on the lower end of one side of each cam (18). The stop (13) is located in the inner shell (7) and is slidably connected to the inner shell (7).

2. The catheter securement device of claim 1, wherein: The inner housing (7) is rotatably connected to a driven gear (19) in the upper and lower axial directions. The driven gear (19) is located between two stops (13). The two stops (13) are located near the ends of two pins (12). A rack (14) is fixedly connected to the ends of the two stops (13). The rack (14) meshes with the driven gear (19) for transmission. The outer housing (1) is provided with a through hole II in the front and rear axial directions. A limit rod (6) is inserted into the through hole II. The middle section of the limit rod (6) is in the form of a rack. The middle section of the limit rod (6) is inserted into the inner housing (7) and meshes with the driven gear (19) for transmission. A through groove (21) is provided on the inner housing (7) for the limit rod (6).

3. The catheter securement device of claim 2, wherein: A limiting ring is sleeved on the outer side of one axial end of the limiting rod (6), and a compression spring (20) is provided between the limiting ring and the inner wall of the outer shell (1). The compression spring (20) is sleeved on the outer side of the limiting rod (6), and the two axial ends of the compression spring (20) abut against the limiting ring and the inner wall of the outer shell (1) respectively. When the compression spring (20) is not affected by external force, the stop block (13) abuts against the cam (18).

4. The catheter securement device of claim 3, wherein: The front end of the limiting rod (6) protrudes from the outer shell (1), and when the limiting rod (6) moves backward along its axial end, the distance between the stop (13) and the cam (18) increases; a pressing plate (5) is fixedly connected to the front end of the limiting rod (6), and the diameter of the pressing plate (5) is not less than two centimeters.

5. The catheter securement device of claim 1, wherein: Each of the stop blocks (13) has an internal threaded hole at its lower end, and each of the stop blocks (13) has a limiting plate (16) at its lower end. The limiting plate (16) has a through hole III, which corresponds to the internal threaded hole. Each through hole III and the corresponding internal threaded hole are screwed together with a bolt (17). Each limiting plate (16) is located outside the inner shell (7), and the inner shell (7) has a sliding groove (15) through it for the bolt (17).

6. The catheter securement device of claim 1, wherein: Each of the outer shells (1) is provided with a plurality of clamping plates I (2) and a plurality of clamping plates II (4), and the plurality of clamping plates I (2) and the plurality of clamping plates II (4) are keyed together with the corresponding driven tube (8).

7. The catheter securement device of claim 6, wherein: Each of the clamping plates I (2) and each of the clamping plates II (4) is fixedly connected to a damping pad (10), and the damping pad (10) is provided with an anti-slip groove.

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