Umbilical vessel catheter fixing device and method

Abstract

The invention relates to the technical field of navel vessel catheter treatment, and discloses a navel vessel catheter fixing device and method.The navel vessel catheter fixing device comprises an elastic pressing piece, a top cover, a bottom cover and medical silica gel, the top of the elastic pressing piece is fixedly connected to the bottom face of the top cover, and the bottom face of the top cover and the top face of the bottom cover are both fixedly connected with connecting structures; the top cover can be fixed to the upper portion of the bottom cover through a connecting structure, the bottom of the bottom cover is connected with the medical silica gel through a connecting piece, the connecting piece, the top cover, the bottom cover and the medical silica gel are each provided with a penetrating channel, and the connecting structure comprises a first side skirt and a second side skirt. And the top surface of the first side skirt is fixedly connected to the bottom surface of the top cover. The second side skirt on the upper surface of the bottom cover can be conveniently connected with the first side skirt on the lower surface of the top cover through the external threads and the internal threads, so that the problem that a traditional umbilical vessel catheter fixing device is more in structure, and consequently operation is tedious is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of umbilical blood vessel catheter treatment, and specifically to an umbilical blood vessel catheter fixing device and method. Background Art

[0002] Currently, in the neonatal intensive care unit, umbilical blood vessel catheters are widely used for infusion, blood sampling, and monitoring vital signs. However, due to reasons such as delicate neonatal skin and frequent activities, umbilical blood vessel catheters are prone to falling off or shifting, bringing many inconveniences to medical staff and even potentially endangering the life safety of neonates. Therefore, how to effectively fix umbilical blood vessel catheters has become an urgent problem to be solved.

[0003] Traditional methods for fixing umbilical blood vessel catheters mainly include using medical tape for fixation, using special umbilical cord clamps, and using elastic bandages for winding. Although these methods can meet the fixation purpose to a certain extent, there are still many problems after use. Fixing with medical tape is not firm, and it is easily loosened due to factors such as sweat and sebum, and long-term use may cause skin allergies in neonates. Using special umbilical cord clamps is complex in operation, requires professional personnel for adjustment, and has a high cost. Fixing with elastic bandages has insufficient fixing strength and is easily loosened with the activities of neonates. With the progress of technology, the requirements for fixing umbilical blood vessel catheters are getting higher and higher. The above methods can only solve some problems singly and cannot comprehensively solve problems such as insecure fixation, cumbersome operation, and high cost, and cannot meet clinical needs. Especially in the neonatal intensive care environment, these defects are more prominent. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an umbilical blood vessel catheter fixing device and method, which solve the problem of cumbersome operation caused by the large number of structures of traditional umbilical blood vessel catheter fixing devices.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: An umbilical blood vessel catheter fixing device includes an elastic pressing piece, a top cover, a bottom cover, and medical silicone. The top of the elastic pressing piece is fixedly connected to the bottom surface of the top cover. Connecting structures are fixedly connected to both the bottom surface of the top cover and the top surface of the bottom cover. The top cover can be fixed on the upper part of the bottom cover through the connecting structure. The bottom of the bottom cover is connected to the medical silicone through a connecting piece. Through channels are opened in the connecting piece, the top cover, the bottom cover, and the medical silicone.

[0006] Preferably, the connecting structure includes a first side skirt and a second side skirt. The top surface of the first side skirt is fixedly connected to the bottom surface of the top cover. The bottom surface of the second side skirt is fixedly connected to the top surface of the bottom cover.

[0007] Preferably, the horizontal cross-sections of the top cover and the bottom cover are both circular, the horizontal cross-sections of the first side skirt and the second side skirt are both circular rings, and the outer diameters of the first side skirt and the second side skirt are equal to the maximum diameter of the top cover and the bottom cover.

[0008] Preferably, the inner diameter of the first side skirt is equal to the outer diameter of the second side skirt, and the first side skirt and the second side skirt can be fixed by mechanical connection.

[0009] Preferably, the mechanical connection for fixing is realized by the threaded connection of an external thread and an internal thread. The inner wall of the first side skirt is provided with an external thread, and the outer wall of the second side skirt is provided with an internal thread.

[0010] Preferably, the through channel includes a first through hole, a second through hole, a third through hole, and a fourth through hole. The horizontal cross-sections of the first through hole, the second through hole, the third through hole, and the fourth through hole are all circular. The diameters of the circles are the same and the centers of the circles are located on the same vertical straight line. The first through hole is located at the center of the top cover, the second through hole is located at the center of the bottom cover, the third through hole is located at the center of the connecting piece, and the fourth through hole is located at the center of the medical silicone.

[0011] Preferably, the elastic pressing piece is made of 316 stainless steel. The longitudinal cross-section of the elastic pressing piece is C-shaped, and the bottom of the elastic pressing piece is in sliding contact with the top surface of the bottom cover.

[0012] Preferably, the connection part of the elastic pressing piece and the top cover is located at the edge of the first through hole. There are four elastic pressing pieces in a circular array with the center of the first through hole as the center.

[0013] Preferably, the connecting piece is made of a composite material. The composite material includes 5-20 parts by weight of a silane coupling agent and 80-95 parts by weight of polyethylene glycol.

[0014] A method for using an umbilical blood vessel catheter fixing device includes the following steps: S1. After the umbilical blood vessel catheter is placed, the external section of the umbilical blood vessel catheter passes through the inside of the fourth through hole, the third through hole, and the second through hole; S2. Fix the bottom of the medical silicone on the skin surface around the umbilicus; S3. The external section of the umbilical blood vessel catheter passes through the inside of the first through hole again; S4. Approximate the external thread on the inner wall of the first side skirt to the internal thread on the outer wall of the second side skirt, and twist the first side skirt to move the first through hole downward, thereby forcing the elastic pressing piece to bend, so that the side wall of the elastic pressing piece contacts the umbilical blood vessel catheter, thereby fixing the umbilical blood vessel catheter.

[0015] Working principle: The umbilical blood vessel catheter can be restricted within the device by using the third through-hole, the fourth through-hole, the first through-hole, and the second through-hole; the external thread on the inner wall of the first side skirt can be threadedly connected with the internal thread on the outer wall of the second side skirt to fix the top cover on the upper part of the bottom cover. At the same time, by turning the first side skirt, the distance between the top cover and the bottom cover can be changed, causing the elastic pressing piece to bend; by changing the distance between the top cover and the bottom cover, the degree of bending change of the elastic pressing piece can be adjusted, enabling convenient fixation of catheters of different sizes; the connecting piece can effectively fix the bottom cover on the surface of the medical silicone; the medical silicone can effectively fix the entire device on the skin surface.

[0016] The present invention provides an umbilical blood vessel catheter fixing device and method. It has the following beneficial effects: 1. In the present invention, the second side skirt on the upper surface of the bottom cover can be conveniently connected with the first side skirt on the lower surface of the top cover through external and internal threads. The elastic pressing piece with a C-shaped longitudinal section can effectively fix the umbilical blood vessel catheter. At the same time, by turning the first side skirt, the distance between the top cover and the bottom cover can be adjusted, and thus the bending amplitude of the elastic pressing piece can be conveniently adjusted to adapt to umbilical blood vessel catheters of different sizes, solving the problem of the cumbersome operation of traditional umbilical blood vessel catheter fixing devices.

[0017] 2. In the present invention, the medical silicone can provide effective support for the upper structure. At the same time, the medical silicone has strong plasticity, can closely fit the umbilical skin, reducing the gap between the device and the skin. And the medical silicone has good biocompatibility, so it can reduce the irritation to the skin of newborns, thus achieving the purpose of firm fixation.

[0018] 3. The connecting piece of the present invention adopts a composite material composed of 5 - 20 parts by weight of silane coupling agent and 80 - 95 parts by weight of polyethylene glycol. The costs of these two materials are relatively low. The overall device has a simple structural design, without complex processing techniques and expensive raw materials. Compared with traditional special umbilical cord clamps, the cost is effectively reduced, making it more suitable for wide clinical application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of an umbilical blood vessel catheter fixing device proposed by the present invention; Figure 2 It is a structural installation schematic diagram of an umbilical blood vessel catheter fixing device proposed by the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the connecting piece of an umbilical blood vessel catheter fixing device proposed by the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the medical silicone of an umbilical blood vessel catheter fixing device proposed by the present invention; Figure 5Schematic diagram of the upper structure at the top cover of an umbilical blood vessel catheter fixing device proposed by the present invention; Figure 6 Schematic diagram of the lower structure at the top cover of an umbilical blood vessel catheter fixing device proposed by the present invention; Figure 7 Schematic three - dimensional structure diagram of the bottom cover and the second side skirt of an umbilical blood vessel catheter fixing device proposed by the present invention; Figure 8 Flow chart of the use of an umbilical blood vessel catheter fixing device proposed by the present invention.

[0020] Wherein, 1. First through - hole; 2. Elastic pressing piece; 3. Top cover; 4. First side skirt; 5. Medical silicone; 6. Second through - hole; 7. Second side skirt; 8. Internal thread; 9. Connecting piece; 10. External thread; 11. Bottom cover; 12. Third through - hole; 13. Fourth through - hole. Detailed implementation manners

[0021] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0022] Please refer to the atta Figure 1 - atta Figure 2 , an umbilical blood vessel catheter fixing device provided by an embodiment of the present invention includes an elastic pressing piece 2, a top cover 3, a bottom cover 11, and medical silicone 5. The top of the elastic pressing piece 2 is fixedly connected to the bottom surface of the top cover 3. Connecting structures are fixedly connected to both the bottom surface of the top cover 3 and the top surface of the bottom cover 11. The top cover 3 can be fixed on the upper part of the bottom cover 11 through the connecting structure. The bottom of the bottom cover 11 is connected to the medical silicone 5 through a connecting piece 9. Through - channels are provided in the connecting piece 9, the top cover 3, the bottom cover 11, and the medical silicone 5; Specifically, the elastic pressing piece 2 fixes the umbilical blood vessel catheter through cooperation with the top cover 3 and the bottom cover 11; the elastic pressing piece 2 is made of 316 stainless steel, has good elasticity, and can buffer external forces. The elastic pressing piece 2 plays a role in buffering and protecting. When the activities of the newborn cause the catheter to be pulled, the elastic pressing piece 2 undergoes elastic deformation, absorbs part of the external force, avoids the catheter from shifting due to excessive external force or causing damage to the umbilical part of the newborn, and protects the safety of the newborn and the normal use of the catheter; the elastic pressing piece 2 plays a role in adapting to the position change of the catheter. The umbilical blood vessel catheter may change its position due to the activities of the newborn. The elasticity of the elastic pressing piece 2 enables it to flexibly adapt to this change. Whether the catheter changes its angle or position, the elastic pressing piece 2 can adjust the pressure distribution on the catheter through its own deformation, continuously provide a stable fixing force for the catheter, and ensure that the entire fixing device can effectively fix the catheter under different circumstances. The top cover 3 plays a role in connection and fixation. The bottom surface of the top cover 3 is fixedly connected to the top of the elastic pressing piece 2, and through the cooperation of the first side skirt 4 and the second side skirt 7 of the bottom cover 11, the top cover 3 is fixed to the bottom cover 11 in a threaded connection manner. This connection method not only makes the structure of the whole device stable, but also can control the fixing force of the elastic pressing piece 2 on the umbilical blood vessel catheter by adjusting the tightness of the threaded connection. During actual use, medical staff twist the first side skirt 4 to drive the top cover 3 to move relative to the bottom cover 11, and then adjust the bending degree of the elastic pressing piece 2 to achieve precise fixation of the catheter; the top cover 3 plays a role in supporting the elastic pressing piece 2, provides stable support for the elastic pressing piece 2, and ensures that the elastic pressing piece 2 can normally perform the function of fixing the umbilical blood vessel catheter; the top cover 3 plays a role in positioning and guiding. During the process of fixing the catheter, the catheter needs to pass through the first through hole 1. The position and size of the first through hole 1 ensure that the catheter is in the central position of the device, enabling the elastic pressing piece 2 to uniformly apply pressure to the catheter and avoid catheter deviation. This helps to improve the stability and reliability of the fixation, and reduce the risk of loose fixation or damage to the newborn caused by improper catheter position. The bottom cover 11 plays a role in support and connection. The top surface of the bottom cover 11 is connected to the bottom surface of the top cover 3 through the second side skirt 7 and the first side skirt 4, and the top cover 3 is fixed on the upper part of the bottom cover 11 in a threaded connection manner to form a stable overall structure. The bottom of the bottom cover 11 is connected to the medical silicone 5 through the connecting piece 9 to build a connection system from the skin to the entire fixing device, ensuring the close combination of the device and the skin of the newborn.Medical silicone 5 has a certain adhesiveness and can firmly adhere to the skin surface around the umbilicus, making the entire device not easily displaced. When fixing the umbilical blood vessel catheter, it works in cooperation with components such as the elastic pressing piece 2 to ensure that the catheter is stably fixed in the correct position, prevent the catheter from falling off or being displaced due to the activities of the newborn, and ensure the smooth progress of catheter treatment; the skin of the newborn is delicate and the skin shape around the umbilicus is irregular. Medical silicone 5 is soft in texture and strong in plasticity, can closely fit the contour of the skin around the umbilicus, reduce the gap between the skin and the device, avoid damaging the skin of the newborn due to friction, and improve the wearing comfort; medical silicone 5 has good biocompatibility, has little irritation to the skin of the newborn, can effectively reduce the occurrence probability of adverse reactions such as allergies. During use, medical silicone 5 can form a barrier between the catheter and the skin, reduce the direct friction and compression of the catheter on the skin, protect the delicate skin of the newborn, and reduce the risk of skin damage; medical silicone 5 has good sealing performance, can effectively prevent external bacteria, dust and other pollutants from contacting the umbilicus and the umbilical blood vessel catheter, and reduce the risk of infection.

[0023] Refer to the appendix Figure 6 -appendix Figure 7 , the connecting structure includes the first side skirt 4 and the second side skirt 7. The top surface of the first side skirt 4 is fixedly connected to the bottom surface of the top cover 3, and the bottom surface of the second side skirt 7 is fixedly connected to the top surface of the bottom cover 11; Specifically, the first side skirt 4 can play a role in connecting with the second side skirt 7, and thus the top cover 3 can be fixed on the upper part of the bottom cover 11.

[0024] Refer to the appendix Figure 6 -appendix Figure 7 , the horizontal cross-sections of the top cover 3 and the bottom cover 11 are both circular, the horizontal cross-sections of the first side skirt 4 and the second side skirt 7 are both circular rings, and the outer diameters of the first side skirt 4 and the second side skirt 7 are equal to the maximum diameters of the top cover 3 and the bottom cover 11; Specifically, the horizontal cross-sections of the top cover 3 and the bottom cover 11 are circular, the horizontal cross-sections of the first side skirt 4 and the second side skirt 7 are circular rings and the outer diameters are equal to the maximum diameters of the top cover 3 and the bottom cover 11. Thus, the entire device can be more evenly stressed in all directions, and at the same time can effectively disperse stress, reduce stress concentration points, and reduce the risk of the device being damaged due to uneven stress. During the use of the device, it may be subjected to external forces from different directions. The circular and circular ring designs can ensure the overall structure of the device is stable and not easily deformed, and continuously provide a stable fixing environment for the umbilical blood vessel catheter.

[0025] Refer to the appendix Figure 1 -appendix Figure 2 , the inner diameter of the first side skirt 4 is equal to the outer diameter of the second side skirt 7, and the first side skirt 4 and the second side skirt 7 can be fixed by mechanical connection; Specifically, the inner diameter of the first side skirt 4 is equal to the outer diameter of the second side skirt 7, and the two are fixed by mechanical connection. This tightly fitting structure enables the top cover 3 and the bottom cover 11 to be firmly connected, forming a stable overall framework. The mechanical connection method provides reliable connection strength.

[0026] Refer to the appendix Figure 6 - appendix Figure 7 , the mechanical connection is achieved by the threaded connection of the external thread 10 and the internal thread 8. The inner wall of the first side skirt 4 is provided with the external thread 10, and the outer wall of the second side skirt 7 is provided with the internal thread 8; Specifically, the threaded connection provides a simple and reliable connection method for the top cover 3 and the bottom cover 11. Just align the external thread 10 on the inner wall of the first side skirt 4 with the internal thread 8 on the outer wall of the second side skirt 7, and then twist the first side skirt 4 to easily complete the connection of the top cover 3 and the bottom cover 11. The operation process is convenient and fast, without the need to rely on complex tools. Moreover, the threaded connection has self-locking property, and can generate a large frictional force after being tightened, making the top cover 3 and the bottom cover 11 tightly fixed together, forming a stable overall structure, effectively preventing the separation of the top cover 3 and the bottom cover 11 due to external forces such as the activities of newborns during use, and ensuring the continuous and stable fixation of the umbilical blood vessel catheter.

[0027] Refer to the appendix Figure 2 - appendix Figure 4 , the through-channel includes a first through-hole 1, a second through-hole 6, a third through-hole 12, and a fourth through-hole 13. The horizontal cross-sections of the first through-hole 1, the second through-hole 6, the third through-hole 12, and the fourth through-hole 13 are all circular, the diameters of the circles are the same and the centers are located on the same vertical line. The first through-hole 1 is located at the center of the top cover 3, the second through-hole 6 is located at the center of the bottom cover 11, the third through-hole 12 is located at the center of the connecting piece 9, and the fourth through-hole 13 is located at the center of the medical silicone 5; Specifically, through the second through-hole 6 at the center of the bottom cover 11, the first through-hole 1 of the top cover 3, the third through-hole 12 of the connecting piece 9, and the fourth through-hole 13 of the medical silicone 5, the centers are located on the same vertical line and the diameters are the same. This enables the umbilical blood vessel catheter to be accurately guided and positioned when passing through these through-holes, ensuring that the catheter is in the center position of the device, facilitating the elastic pressing piece 2 to apply force evenly to fix the catheter, preventing the catheter from shifting, and improving the stability and reliability of the fixation effect.

[0028] Refer to the appendix Figure 5 and appendix Figure 6 , the elastic pressing piece 2 is made of 316 stainless steel, the longitudinal cross-section of the elastic pressing piece 2 is C-shaped, and the bottom of the elastic pressing piece 2 is in sliding contact with the top surface of the bottom cover 11; Specifically, the elastic pressing piece 2 is made of 316 stainless steel, which has good biosecurity and will not harm newborns. The longitudinal section of the elastic pressing piece 2 is C-shaped, and the C-shaped structure endows the elastic pressing piece 2 with good elastic deformation ability. When the top cover 3 moves relative to the bottom cover 11 through threaded connection, the elastic pressing piece 2 bends, and its side wall contacts the umbilical blood vessel catheter and generates pressure, thereby fixing the catheter. Due to the elasticity of the C-shaped structure, the pressing piece can adjust the applied pressure according to the thickness of the catheter and actual needs, ensuring firm fixation while not damaging the catheter or the umbilical part of the newborn due to excessive pressure. Moreover, this elasticity can also buffer external forces when the newborn moves, reducing the risk of catheter displacement or detachment. The bottom of the elastic pressing piece 2 is in sliding contact with the top surface of the bottom cover 11, which facilitates the flexible adjustment of the position of the elastic pressing piece 2 as the top cover 3 moves during the installation of the device. When medical staff turn the first side skirt 4 to lower the top cover 3, the elastic pressing piece 2 can slide smoothly on the top surface of the bottom cover 11 without jamming, ensuring uniform contact and stable fixation between the elastic pressing piece 2 and the catheter. In subsequent use, if it is necessary to readjust the fixing force, this sliding connection method is also convenient for operation, improving the convenience of use.

[0029] Refer to the appendix Figure 5 and the appendix Figure 6 , the connection part between the elastic pressing piece 2 and the top cover 3 is located at the edge of the first through hole 1, and the elastic pressing pieces 2 are arranged in a circular array with the center of the first through hole 1 as the center, and there are four in total; Specifically, this enables the elastic pressing piece 2 to apply pressure to the umbilical blood vessel catheter passing through the first through hole 1 from multiple directions, ensuring uniform force on the catheter in all directions. Compared with a single or a small number of pressing pieces, the four pressing pieces can better wrap the catheter, avoiding offset and tilt of the catheter during fixation, thereby providing a stable and balanced fixing force and effectively preventing catheter displacement or detachment.

[0030] Refer to the appendix Figure 5 and the appendix Figure 6 , the connecting piece 9 is made of a composite material, and the composite material includes 5 - 20 parts by weight of silane coupling agent and 80 - 95 parts by weight of polyethylene glycol; Specifically, the silane coupling agent can form chemical bonds at the interfaces of different materials. The connecting piece 9 is tightly connected to the bottom cover 11 and the medical silicone 5 through it respectively. After the hydrolyzable groups in the silane coupling agent molecule are hydrolyzed into silanol groups, they condense with the hydroxyl groups on the surface of the bottom cover 11 to form stable silicon-oxygen bonds. At the same time, the non-hydrolyzable groups react or interact with the organic groups in the medical silicone 5 to enhance the binding force between the two, making the structure of the entire fixing device stable and preventing component separation from affecting catheter fixation. Polyethylene glycol has good hydrophilicity and chemical stability, and can improve the compatibility between the silane coupling agent and the bottom cover 11 and the medical silicone 5. As a high molecular polymer, in the composite material system of the connecting piece 9, it reduces the interfacial tension between different materials, enables the silane coupling agent to be more evenly dispersed therein, avoids phase separation due to poor compatibility, ensures the overall performance stability of the connecting piece 9, and maintains the stable connection between the components of the device.

[0031] Refer to the appendix Figure 8 , the embodiment of the present invention provides a method for using an umbilical blood vessel catheter fixing device, including the following steps: S1. After the umbilical blood vessel catheter is placed, the external section of the umbilical blood vessel catheter passes through the fourth through hole 13, the third through hole 12, and the second through hole 6 from the inside; S2. Fix the bottom of the medical silicone 5 on the skin surface around the umbilicus; S3. The external section of the umbilical blood vessel catheter passes through the inside of the first through hole 1 again; S4. Approximate the external thread 10 on the inner wall of the first side skirt 4 to the internal thread 8 on the outer wall of the second side skirt 7, rotate the first side skirt 4 to move the first through hole 1 downward, thereby forcing the elastic pressing piece 2 to bend, so that the side wall of the elastic pressing piece 2 contacts the umbilical blood vessel catheter, thereby fixing the umbilical blood vessel catheter; Specifically, S1 is the base installation step, which provides preliminary positioning guidance for the subsequent fixation of the catheter; S2 is the pasting step, which fixes the medical silicone 5 on the skin surface around the umbilicus and builds a stable support foundation for the entire fixing device; S3 is the fixing ring installation step, which further accurately positions the catheter, enables the elastic pressing piece 2 to evenly apply pressure to the catheter, avoids catheter deviation, ensures the uniformity and stability of the fixing effect, and improves the reliability of fixation; S4 is the fastening connection step. This method of adjusting the elastic pressing piece 2 through threaded connection can flexibly control the fixing force according to actual needs, which can not only ensure firm catheter fixation, prevent its displacement or detachment, but also avoid damaging the catheter or the neonatal umbilicus due to excessive pressure, ensuring the effectiveness and safety of fixation; Thus, it can further reflect the simplicity and convenience of the overall use of the device.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An umbilical vascular catheter fixing device, comprising an elastic pressing sheet (2), a top cover (3), a bottom cover (11) and medical silica gel (5), characterized in that: The top of the elastic pressing sheet (2) is fixedly connected to the bottom surface of the top cover (3), the bottom surface of the top cover (3) and the top surface of the bottom cover (11) are both fixedly connected with a connecting structure, the top cover (3) can be fixed to the upper part of the bottom cover (11) through the connecting structure, the bottom of the bottom cover (11) is connected to the medical silicone (5) through a connecting sheet (9), and the connecting sheet (9), the top cover (3), the bottom cover (11) and the medical silicone (5) are all provided with a through channel.

2. The umbilical vascular catheter fixing device according to claim 1, characterized in that: The connection structure comprises a first side skirt (4) and a second side skirt (7), wherein the top surface of the first side skirt (4) is fixedly connected to the bottom surface of the top cover (3), and the bottom surface of the second side skirt (7) is fixedly connected to the top surface of the bottom cover (11).

3. The umbilical vascular catheter fixing device according to claim 2, characterized in that: The horizontal cross-sections of the top cover (3) and the bottom cover (11) are both circular, the horizontal cross-sections of the first side skirt (4) and the second side skirt (7) are both circular, and the outer diameters of the first side skirt (4) and the second side skirt (7) are equal to the maximum diameters of the top cover (3) and the bottom cover (11).

4. The umbilical vascular catheter fixing device according to claim 3, characterized in that: The horizontal cross-sections of the top cover (3) and the bottom cover (11) are both circular, the horizontal cross-sections of the first side skirt (4) and the second side skirt (7) are both circular, and the outer diameters of the first side skirt (4) and the second side skirt (7) are equal to the maximum diameters of the top cover (3) and the bottom cover (11).

5. The umbilical vascular catheter fixing device according to claim 4, characterized in that: The mechanical connection is fixed by threading an external thread (10) and an internal thread (8), the inner wall of the first side skirt (4) is provided with an external thread (10), and the outer wall of the second side skirt (7) is provided with an internal thread (8).

6. The umbilical vascular catheter fixing device according to claim 1, characterized in that: The through channel comprises a first through hole (1), a second through hole (6), a third through hole (12) and a fourth through hole (13); the first through hole (1), the second through hole (6), the third through hole (12) and the fourth through hole (13) are all circular in horizontal cross-section; the circles have the same diameter and their centers are located on the same vertical straight line; the first through hole (1) is located at the center of the top cover (3); the second through hole (6) is located at the center of the bottom cover (11); the third through hole (12) is located at the center of the connecting sheet (9); and the fourth through hole (13) is located at the center of the medical silica gel (5).

7. The umbilical vascular catheter fixing device according to claim 1, characterized in that: The elastic pressing sheet (2) is made of 316 stainless steel, the longitudinal cross-section of the elastic pressing sheet (2) is C-shaped, and the bottom of the elastic pressing sheet (2) is in sliding contact with the top surface of the bottom cover (11).

8. The umbilical vascular catheter fixing device according to claim 7, characterized in that: The connection point between the elastic pressing sheet (2) and the top cover (3) is located at the edge of the first through hole (1), and there are four elastic pressing sheets (2) in a circular array with the center of the first through hole (1).

9. The umbilical vascular catheter fixing device according to claim 1, characterized in that: The connecting sheet (9) is made of a composite material, wherein the composite material comprises 5-20 parts by weight of a silane coupling agent and 80-95 parts by weight of polyethylene glycol.

10. A method for using the umbilical vascular catheter fixing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. After the umbilical vascular catheter is placed, the outer section of the umbilical vascular catheter is passed through the fourth through hole (13), the third through hole (12) and the second through hole (6); S2, fixing the bottom of the medical silica gel (5) on the skin surface around the navel; S3, passing the outer section of the umbilical vascular catheter out from the inside of the first through hole (1); S4. Bring the external thread (10) on the inner wall of the first side skirt (4) closer to the internal thread (8) on the outer wall of the second side skirt (7), twist the first side skirt (4) to move the first through hole (1) downward, and force the elastic pressing sheet (2) to bend, so that the side wall of the elastic pressing sheet (2) contacts the umbilical vascular catheter, thereby fixing the umbilical vascular catheter.

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