In-vitro fixing device for central venous catheter

Abstract

The utility model relates to the technical field of medical instruments, and discloses an in-vitro fixing device for a central venous catheter, which comprises a bonding sheet and a pressing sheet rotationally connected with the bonding sheet, a guide groove is arranged on the side wall of the pressing sheet, a guide block matched with the guide groove to form a guide area is arranged outside the bonding sheet, and the pressing sheet is arranged in the guide area. A guiding area formed by the guiding groove and the guiding block is in a bent shape, an opening in the end, close to the connecting point position of the bonding piece and the pressing piece, of the guiding area is expanded, a receding groove matched with the guiding area in position is formed in the bonding piece, and a tail connecting limiting piece is arranged in the pressing piece. A bonding layer is arranged on the side, away from the pressing piece, of the bonding piece. An elastic limiting assembly used for limiting the position of the pressing piece is arranged in the pressing piece. The in-vitro fixing device for the central venous catheter has the advantages that the whole section of the in-vitro part of the catheter can be fixed, and the disengagement condition of the catheter can be judged.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an external fixation device for central venous catheters. Background Technology

[0002] A central venous catheter is a medical catheter that is inserted percutaneously into a central vein. It consists of components such as a catheter, guidewire, and puncture needle. It is mostly made of polyurethane or silicone, which has good biocompatibility and flexibility. It is mainly used for fluid resuscitation, blood transfusion, and intravenous nutritional support in critically ill patients. It can rapidly resuscitate large amounts of fluids and blood to meet high flow requirements. It can also be used to infuse high concentrations of highly irritating drugs while avoiding peripheral venous injury.

[0003] Existing methods for fixing central venous catheters typically involve sutures. However, this method usually only fixes the middle part of the catheter, leaving the end unrestricted. This can lead to repeated contact with the end during movement, causing discomfort. Furthermore, it makes it impossible to assess whether the catheter has dislodged. Suture fixation also causes additional damage, resulting in patient discomfort and significant inconvenience. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an external fixation device for central venous catheters. It has the advantages of being able to fix the entire external portion of the catheter and being able to determine the catheter dislodgement status. It solves the problems of the inability to properly restrict the end, the easy repeated contact with the end during movement causing discomfort, the inability to determine the catheter dislodgement status, and the additional damage caused by suture fixation, which leads to patient discomfort.

[0006] (II) Technical Solution

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An external fixation device for a central venous catheter includes an adhesive sheet and a pressing sheet rotatably connected thereto. The side wall of the pressing sheet is provided with a guide groove. The outside of the adhesive sheet is provided with a guide block that cooperates with the guide groove to form a guiding area. The inside of the pressing sheet is provided with a tail limiting member. The side of the adhesive sheet away from the pressing sheet is provided with an adhesive layer.

[0008] The pressing piece is internally provided with an elastic limiting component for restricting its own position;

[0009] The adhesive sheet is provided with a mating piece on its exterior that cooperates with the elastic limiting component;

[0010] The pressing plate has a pipe release response element inside.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the guide area formed by the guide groove and the guide block is bent, and the guide area is opened at one end near the connection point between the adhesive sheet and the pressing sheet in an expanded manner. The adhesive sheet has a clearance groove inside that is adapted to the guide area.

[0013] Furthermore, the side wall of the pressing piece is provided with a limiting sliding groove that communicates with the guide groove, and the tail limiting member is slidably connected to the inner wall of the limiting sliding groove.

[0014] Furthermore, the tail end limiting member includes a sliding block that is connected to the limiting sliding groove and contacts the adhesive sheet to form a compression. The sliding block is provided with a limiting groove on the side facing the guiding area, and the inner sidewall of the limiting groove is provided with an elastic airbag that restricts the end of the conduit.

[0015] Furthermore, the elastic limiting component includes an elastic element fixed inside the pressing piece, the other end of the elastic element is connected to a toggle latching piece extending to the outside of the pressing piece, and the end of the toggle latching piece is connected to a latching rod extending into the mating piece.

[0016] Furthermore, the inner wall of the pressing piece is slidably connected to the outer side of the actuating latching piece, and the sliding direction of the latching piece is restricted. The end of the mating piece is provided with an insertion guide chamfer.

[0017] Furthermore, the pipe disengagement response element includes a response hole that communicates with the guide groove and is located at the inflection point where the guide groove and the conduit first contact. A response block is slidably connected inside the response hole, and an elastic sheet connected to the pressing plate is provided on the outside of the response block.

[0018] This invention provides an external fixation device for central venous catheters. Before fixation, a pressure plate is used. Before fixation, the pressure plate is released via an elastic limiting component, allowing separation from the adhesive plate. The catheter is then placed inside the guide groove, with its end positioned within the limiting groove. The pressure plate and adhesive plate can then be closed. During closure, the catheter end retracts under the influence of the guide area until fully closed. After full closure, the catheter is laid flat within the guide area, its end compressed and restricted by an elastic balloon. The sliding block cannot move due to friction with the adhesive plate, thus fixing the catheter and its end. After fixation, the entire device is adhered to the skin surface via an adhesive layer. The guide groove effectively prevents catheter bending during adhesion. When the catheter dislodges, the first bending point of the catheter extension, i.e., the most protruding section of the guide block, is compressed, pushing the corresponding dislodgement component to respond. By determining the position of the corresponding block, the dislodgement status can be identified.

[0019] In summary, this external fixation device for central venous catheters has the advantages of being able to fix the entire external portion of the catheter and being able to determine if the catheter has dislodged. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic cross-sectional view of the present invention.

[0022] Figure 3 This is an enlarged view of point A in the figure of this utility model;

[0023] Figure 4 This is an enlarged view of section B in the figure of this utility model;

[0024] Figure 5 This is a schematic diagram of the elastic limiting component of this utility model.

[0025] In the diagram: 1. Adhesive sheet; 2. Pressing sheet; 3. Guide groove; 4. Guide block; 5. Tail end limiting component; 51. Sliding block; 52. Limiting groove; 53. Elastic airbag; 6. Elastic limiting component; 61. Elastic component; 62. Actuating snap-fit ​​piece; 63. Locking rod; 7. Mating piece; 8. Release response component; 81. Response hole; 82. Response block; 83. Elastic sheet; 11. Adhesive layer. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-5 This utility model provides an external fixation device for a central venous catheter, including an adhesive sheet 1 and a pressing sheet 2 rotatably connected thereto. The side wall of the pressing sheet 2 is provided with a guide groove 3. The outside of the adhesive sheet 1 is provided with a guide block 4 that cooperates with the guide groove 3 to form a guiding area. The inside of the pressing sheet 2 is provided with a tail limiting member 5. The side of the adhesive sheet 1 away from the pressing sheet 2 is provided with an adhesive layer 11.

[0028] The pressing plate 2 is internally provided with an elastic limiting component 6 for limiting its own position;

[0029] The adhesive sheet 1 is provided with a mating sheet 7 on its outside, which mates with the elastic limiting component 6;

[0030] The inside of the pressing plate 2 is provided with a pipe release response element 8.

[0031] Furthermore, the guiding area formed by the guide groove 3 and the guide block 4 is bent, and the guide area is opened at one end near the connection point between the adhesive sheet 1 and the pressing sheet 2 in an expanded manner. The adhesive sheet 1 has a relief groove inside that is adapted to the guiding area.

[0032] Furthermore, a limiting sliding groove communicating with the guide groove 3 is provided on the side wall of the pressing plate 2, and the tail limiting member 5 is slidably connected to the inner wall of the limiting sliding groove.

[0033] Furthermore, the tail-end limiting member 5 includes a sliding block 51 that is connected to the limiting sliding groove and contacts the adhesive sheet 1 to form a compression. The sliding block 51 is provided with a limiting groove 52 on the side facing the guiding area. An elastic airbag 53 is provided on the inner side wall of the limiting groove 52 to limit the end of the conduit.

[0034] When the positions of the adhesive sheet 1 and the pressing sheet 2 are relatively fixed, the sliding block 51 can be relatively fixed under the friction force generated by the pressing with the adhesive sheet 1 and cannot move, thereby restricting the catheter tail connector. When the pressing sheet 2 can rotate freely, the sliding block 51 can slide, thereby matching the position of the catheter tail connector.

[0035] Furthermore, the elastic limiting component 6 includes an elastic element 61 fixed inside the pressing piece 2, and the other end of the elastic element 61 is connected to a toggle latching piece 62 extending to the outside of the pressing piece 2. The end of the toggle latching piece 62 is connected to a latching rod 63 extending into the mating piece 7.

[0036] Furthermore, the inner wall of the pressing piece 2 is slidably connected to the outer side of the toggle latching piece 62 and its sliding direction is restricted, and the end of the mating piece 7 is provided with a chamfer for insertion guidance.

[0037] When the elastic limiting component is in operation, the locking rod 63 restricts the mating piece 7, preventing it from moving. This restricts the relative position between the adhesive piece 1 and the pressing piece 2. When it is necessary to rotate the pressing piece 2, hold the pressing piece 2 and push the locking piece 62 to compress the elastic component 61, thereby moving the locking rod 63 and disengaging it from the mating piece 7. At this time, the pressing piece 2 can be rotated. When connecting, simply rotate the pressing piece 2 to press the mating piece 7 against the locking rod 63 and form a locking connection as the piece continues to move.

[0038] Furthermore, the pipe disengagement response element 8 includes a response hole 81 that communicates with the guide groove 3 and is located at the inflection point where the guide groove and the conduit first contact. A response block 82 is slidably connected inside the response hole 81, and an elastic sheet 83 connected to the pressing sheet 2 is provided on the outside of the response block 82.

[0039] The elastic sheet 83 is V-shaped and its two ends are connected to the response block 82 and the pressing sheet 2 respectively. The elastic force of the elastic sheet 83 is relatively weak. An indicator sheet should be provided on the outside of the pressing sheet 2. The indicator sheet has a disengagement threshold scale line on its outside. When the guide tube squeezes the response block, it is pushed. At this time, the indicator sheet can judge the squeezing state and thus obtain the disengagement information.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] 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 external fixation device for a central venous catheter, characterized in that: It includes an adhesive sheet (1) and a pressing sheet (2) rotatably connected thereto. The pressing sheet (2) has a guide groove (3) on its side wall. The adhesive sheet (1) has a guide block (4) on its outside that cooperates with the guide groove (3) to form a guiding area. The pressing sheet (2) has a tail limiter (5) inside. The adhesive sheet (1) has an adhesive layer (11) on its side away from the pressing sheet (2). The pressing piece (2) is provided with an elastic limiting component (6) for limiting its own position; The adhesive sheet (1) is provided with a mating sheet (7) that cooperates with the elastic limiting component (6) on its outside; The pressing plate (2) is provided with a pipe release response element (8) inside.

2. The external fixation device for a central venous catheter according to claim 1, characterized in that: The guide area formed by the guide groove (3) and the guide block (4) is bent. The guide area is opened at one end near the connection point of the adhesive sheet (1) and the pressing sheet (2) and is expanded. The adhesive sheet (1) has a relief groove inside that is adapted to the guide area.

3. An external fixation device for a central venous catheter according to claim 2, characterized in that: The side wall of the pressing piece (2) is provided with a limiting sliding groove that communicates with the guide groove (3), and the tail limiting member (5) is slidably connected to the inner wall of the limiting sliding groove.

4. An external fixation device for a central venous catheter according to claim 1, characterized in that: The tail-end limiting member (5) includes a sliding block (51) that is connected to the limiting sliding groove and contacts the adhesive sheet (1) to form a compression. The sliding block (51) is provided with a limiting groove (52) on the side facing the guiding area. The inner sidewall of the limiting groove (52) is provided with an elastic airbag (53) that restricts the end of the conduit.

5. An external fixation device for a central venous catheter according to claim 1, characterized in that: The elastic limiting component (6) includes an elastic element (61) fixed inside the pressing piece (2), and the other end of the elastic element (61) is connected to a toggle latching piece (62) extending to the outside of the pressing piece (2). The end of the toggle latching piece (62) is connected to a latching rod (63) extending into the mating piece (7).

6. An external fixation device for a central venous catheter according to claim 5, characterized in that: The inner wall of the pressing piece (2) is slidably connected to the outer side of the toggle latching piece (62) and its sliding direction is restricted. The end of the mating piece (7) is provided with a chamfer for insertion guidance.

7. An external fixation device for a central venous catheter according to claim 1, characterized in that: The pipe ejection response element (8) includes a response hole (81) that communicates with the guide groove (3) and is located at the inflection point of the first contact between the guide groove and the conduit. A response block (82) is slidably connected inside the response hole (81), and an elastic sheet (83) connected to the pressing sheet (2) is provided on the outside of the response block (82).

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