Central venous catheter with hydrophilic coating

Abstract

The utility model provides a central venous catheter with a hydrophilic coating, which relates to the technical field of medical equipment and comprises a catheter and a connector arranged at the input end of the catheter, a movable seat and a fixed block are arranged outside the catheter, an inserting rod is arranged on the side wall of the fixed block, and a puncture head is arranged at one end of the inserting rod far away from the fixed block. An inserting groove matched with the puncturing head is formed in the moving seat, a sliding groove communicated with the inserting groove is further formed in the moving seat, a clamping block is arranged in the sliding groove, a spring is fixedly connected between the clamping block and the inner wall of the sliding groove, and a clamping groove matched with the clamping block is formed in the outer wall of the inserting rod. When the catheter is used, the damage to human tissues can be effectively reduced, meanwhile, the pain of a patient is reduced, the catheter can be destroyed after being used, and the situation that the catheter is directly discarded and is collected and sold again by an illegal person, and the society and the patient are damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a central venous catheter with a hydrophilic coating. Background Art

[0002] Central venous catheter placement is a commonly used monitoring and treatment method in clinical practice. Through a fixed central venous catheter entrance, it provides a simple and painless method for intravenous drug therapy, rapid blood transfusion and volume therapy for intraoperative hemorrhagic shock, total parenteral central venous nutrition, blood transfusion and blood supplies, blood sample collection, central venous pressure monitoring, etc. Compared with single-lumen central venous catheters, double-lumen central venous catheters can provide two independent infusion pathways at the same time with a higher flow rate, so their clinical application is very wide.

[0003] Currently, in order to improve hygiene and avoid cross infection, central venous catheters are generally disposable and discarded after use. However, some unscrupulous elements will collect central venous catheters discarded by hospitals, clean them and sell them again. If used central venous catheters enter the market again, it will cause harm to patients. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the existing central venous catheter cannot be self-destructed after use and directly discarded will be collected and resold by illegal elements, thus causing harm to patients.

[0005] In order to achieve the above-mentioned invention object, the utility model provides the following technical solutions:

[0006] A central venous catheter with a hydrophilic coating comprises a catheter and a connector arranged at the input end of the catheter, a movable seat and a fixed block are arranged outside the catheter, a plug rod is arranged on the side wall of the fixed block, a puncture head is arranged on the end of the plug rod away from the fixed block, a slot matching the puncture head is arranged inside the movable seat, a slide groove connected to the slot is also arranged inside the movable seat, a clamping block is arranged inside the slide groove, a spring is fixedly connected between the clamping block and the inner wall of the slide groove, and a clamping groove matching the clamping block is arranged on the outer wall of the plug rod.

[0007] As a preferred technical solution of the present application, an inclined extrusion surface is provided at one end of the clamping block away from the slide groove.

[0008] As a preferred technical solution of the present application, the slot is a ring-shaped structure.

[0009] As a preferred technical solution of the present application, the outer wall of the movable seat is provided with a sliding sleeve that matches the catheter, and the inner wall of the sliding sleeve is provided with a rubber pad that fits the outer wall of the catheter.

[0010] As a preferred technical solution of the present application, a thread groove is provided on the outer wall of the insertion rod, and a protective cover is threadedly connected to the outside of the insertion rod through the thread groove.

[0011] As a preferred technical solution of the present application, the side wall of the movable seat is rotatably connected to a rotating shaft, and a sealing cover for covering the slot is sleeved on the rotating shaft.

[0012] As a preferred technical solution of the present application, the catheter includes a polyurethane tube body and a hydrophilic lubricating coating wrapped around the inner and outer walls of the polyurethane tube body.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] When the catheter is not used, the catheter can be bent to abut the fixed block against the movable seat. At this time, the pipe can be punctured by the provided insertion rod and puncture head. After the insertion rod punctures the catheter and is completely inserted into the slot, the provided clamping block and the spring can lock the insertion rod inside the movable seat, so that the catheter can be wrapped and punctured, which solves the problem in the prior art that the catheter is discarded and then collected and sold again by criminals, causing harm to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall structure diagram of the utility model;

[0016] Figure 2 It is a cross-sectional structural diagram of the utility model;

[0017] Figure 3 For the utility model Figure 2 The structure diagram at A is enlarged;

[0018] Figure 4 For the utility model Figure 2 The structure diagram at B is enlarged;

[0019] Figure 5 For the utility model Figure 3 The enlarged structure diagram at C in the middle;

[0020] Figure 6 This is a cross-sectional structural diagram of the catheter of the present utility model.

[0021] Indicated in the figure:

[0022] 1. Catheter; 101. Connector; 102. Polyurethane tube body; 103. Hydrophilic lubricating coating; 2. Moving seat; 201. Slot; 202. Slide; 3. Fixed block; 4. Insertion rod; 401. Piercing head; 402. Slot; 5. Block; 501. Spring; 6. Protective cover; 7. Sleeve; 701. Rubber pad; 8. Rotating shaft; 9. Sealing cover. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0024] like Figures 1 to 5 As shown, this embodiment proposes a central venous catheter with a hydrophilic coating, including a catheter 1 and a connector 101 arranged at the input end of the catheter 1, a movable seat 2 and a fixed block 3 are arranged outside the catheter 1, a plug rod 4 is arranged on the side wall of the fixed block 3, a puncture head 401 is arranged at one end of the plug rod 4 away from the fixed block 3, a slot 201 matching with the puncture head 401 is arranged inside the movable seat 2, a slide 202 connected with the slot 201 is also arranged inside the movable seat 2, a clamping block 5 is arranged inside the slide 202, a spring 501 is fixedly connected between the clamping block 5 and the inner wall of the slide 202, and a clamping slot 402 matching with the clamping block 5 is opened on the outer wall of the plug rod 4;

[0025] When the catheter 1 is used up, the catheter 1 can be bent to make the fixed block 3 against the movable seat 2. At this time, the insertion rod 4 on the fixed block 3 will be inserted into the slot 201 inside the movable seat 2. Continuing to push the fixed block 3 can puncture the pipeline through the puncture head 401 on the insertion rod 4. When the insertion rod 4 and the puncture head 401 pass through the catheter 1 and contact the block 3, the block 3 will be squeezed back into the slide groove 202 and the spring will be compressed. When the insertion rod 4 is fully inserted into the slot 201, the slot 402 on the outer wall of the insertion rod 4 will just move to a position flush with the block 5. At this time, the spring 501 will be released from the force and drive the block 5 to rebound and reset and insert into the slot 201 to lock the insertion rod 4. At this time, the fixed block 3 and the movable seat 2 will be locked. Therefore, the catheter 1 will not only be permanently bent, but also punctured, so that it can be damaged after the use of the catheter 1 is finished, so as to avoid the catheter 1 being directly discarded after use and collected and resold by criminals, causing harm to society and patients.

[0026] In order to facilitate the insertion rod and the piercing head to push the block into the slide groove, an inclined extrusion surface can be set at the end of the block 5 away from the slide groove 202; when the insertion rod 4 and the piercing head 401 contact the inclined extrusion surface of the block 5, it is convenient to squeeze the block 5 into the slide groove 201.

[0027] In addition, the card slot 402 is a ring-shaped structure, which facilitates the card blocks 5 at different positions of the insertion rod 4 to be inserted into the card slot 201, thereby improving the stability of locking the insertion rod 4.

[0028] Among them, the outer wall of the insertion rod 4 is provided with a threaded groove, and the outside of the insertion rod 4 is threadedly connected with a protective cover 6 through the threaded groove; before the catheter 1 is used, the protective cover 6 is installed on the insertion rod 4 to prevent the puncture head 401 on the insertion rod 4 from touching medical staff or patients and causing injuries.

[0029] It should be noted that the side wall of the movable seat 2 is rotatably connected to a rotating shaft 8, and a sealing cover 9 for covering the slot 201 is sleeved on the rotating shaft 8; before the catheter 1 is used, the sealing cover 9 can be rotated to block the slot 201 on the movable seat 2, and when the catheter 1 needs to be damaged after use, the sealing plate 9 can be rotated to open the slot 201.

[0030] like Figure 3 As shown, as a preferred embodiment, based on the above method, further, the outer wall of the movable seat 2 is provided with a sliding sleeve 7 matched with the catheter 1, and the inner wall of the sliding sleeve 7 is provided with a rubber pad 701 that fits the outer wall of the catheter 1;

[0031] The rubber pad 701 is provided to increase the friction between the sleeve 7 and the catheter 1, so that in the absence of external interference, the movable seat 2 will not be displaced on the catheter 1. By pulling the sleeve 7, the sleeve 7 and the movable seat 2 can be forced to move on the catheter 1, which makes it easy to adjust the position of the movable seat 2, avoiding the influence of the movable seat 2 on the use of the catheter 1 when the catheter 1 is in use, and different parts of the catheter 1 can be punctured at will as needed.

[0032] like Figure 6 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the catheter 1 includes a polyurethane tube body 102 and a hydrophilic lubricating coating 103 wrapped around the inner and outer walls of the polyurethane tube body 102; the coating of the hydrophilic lubricating coating 103 greatly improves the hydrophilic lubricating performance of the polyurethane tube body 102, which can effectively reduce damage to human tissues, reduce the pain of patients, and eliminate the possibility of organic solvents being transferred into the human body, without toxic side effects on patients.

[0033] Working principle of the utility model: when the catheter 1 is in use, the hydrophilic lubricating coating 103 can improve the hydrophilic lubricating performance of the polyurethane tube body 102, thereby effectively reducing damage to human tissue, reducing the patient's pain, and eliminating the possibility of organic solvents being transferred into the human body, without toxic side effects on the patient. When the catheter 1 is not used, the catheter 1 can be bent to make the fixed block 3 and the movable seat 2 counterbalanced. At this time, the insertion rod 4 will be inserted into the slot 201 and puncture the pipe through the puncture head 401. When the insertion rod 4 and the puncture head 401 pass through the catheter 1 and contact the block 3, the block 3 will be squeezed back into the slide groove 202 and the spring will be compressed. When the insertion rod 4 is fully inserted into the slot 201, the spring 501 will be released from the force and drive the block 5 to rebound and reset and insert into the slot 201 to lock the insertion rod 4. At this time, the fixed block 3 and the movable seat 2 will be locked. Therefore, the catheter 1 will not only be permanently bent, but also punctured, so that it can be damaged after the use of the catheter 1, avoiding the catheter 1 being directly discarded after use and collected and resold by criminals to cause harm to society and patients.

[0034] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A central venous catheter with a hydrophilic coating, comprising a catheter (1) and a connector (101) arranged at an input end of the catheter (1), characterized in that: The catheter (1) is provided with a movable seat (2) and a fixed block (3) on the outside, the fixed block (3) is provided with an insertion rod (4) on the side wall, and a puncture head (401) is provided on the end of the insertion rod (4) away from the fixed block (3). The movable seat (2) is provided with a slot (201) matching with the puncture head (401) inside, and the movable seat (2) is also provided with a slide groove (202) connected with the slot (201) inside, and a clamping block (5) is provided inside the slide groove (202), and a spring (501) is fixedly connected between the clamping block (5) and the inner wall of the slide groove (202), and the outer wall of the insertion rod (4) is provided with a clamping groove (402) matching with the clamping block (5).

2. A central venous catheter with a hydrophilic coating according to claim 1, characterized in that: An inclined extrusion surface is provided at one end of the clamping block (5) away from the slide groove (202).

3. A central venous catheter with a hydrophilic coating according to claim 1, characterized in that: The slot (402) is a ring-shaped structure.

4. A central venous catheter with a hydrophilic coating according to claim 1, characterized in that: The outer wall of the movable seat (2) is provided with a sliding sleeve (7) that matches the catheter (1), and the inner wall of the sliding sleeve (7) is provided with a rubber pad (701) that fits the outer wall of the catheter (1).

5. A central venous catheter with a hydrophilic coating according to claim 1, characterized in that: The outer wall of the insertion rod (4) is provided with a thread groove, and the outside of the insertion rod (4) is threadedly connected to a protective cover (6) via the thread groove.

6. A central venous catheter with a hydrophilic coating according to claim 1, characterized in that: The side wall of the movable seat (2) is rotatably connected to a rotating shaft (8), and a sealing cover (9) for covering the slot (201) is sleeved on the rotating shaft (8).

7. A central venous catheter with a hydrophilic coating according to claim 1, characterized in that: The catheter (1) comprises a polyurethane tube body (102) and a hydrophilic lubricating coating (103) wrapped around the inner and outer walls of the polyurethane tube body (102).

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