Novel central venous catheter

Abstract

The utility model discloses a novel central venous catheter which comprises an outer tube, an inner tube and a connector. The inner pipe is sleeved with the outer pipe, the inner pipe can be drawn out of the outer pipe, and the connector is installed at the tail of the outer pipe; a plurality of through holes are formed in the front portion of the outer pipe, and a plurality of through holes are formed in the corresponding positions of the front portion of the inner pipe. A stitching instrument is arranged in the middle of the outer tube, and the head of the outer tube is sharp.

Description

Technical Field

[0001] The utility model relates to a medical device, in particular to a novel central venous catheter. Background Art

[0002] Central venous catheters are widely used in clinical practice. They can be inserted into the patient's body through the internal jugular vein, subclavian vein, femoral vein or brachial vein. Due to the long retention time in the body, the part where the inner wall of the catheter contacts the blood may form adhesions due to the deposition of blood components, resulting in narrowing of the channel or complete blockage of the catheter through hole. Blockage or obstruction inside the central venous catheter may affect the normal infusion, blood transfusion or other treatments. Utility Model Content

[0003] Therefore, the utility model proposes a novel central venous catheter, which can well solve the above problems.

[0004] In order to achieve the purpose of this utility model, the following technical solutions are adopted:

[0005] A novel central venous catheter comprises an outer tube, an inner tube and a joint; the outer tube is sleeved on the inner tube and the inner tube can be drawn out of the outer tube, and the joint is installed at the tail of the outer tube; a plurality of through holes are opened on the front of the outer tube, and a plurality of through holes are also opened at the corresponding positions on the front of the inner tube; a suturing device is arranged in the middle of the outer tube, and the head of the outer tube is sharp.

[0006] The novel central venous catheter has a closed outer tube head, or a central hole is opened at the top of the inner tube head and the top of the outer tube head, and the two central holes are through holes and interpenetrate each other.

[0007] The novel central venous catheter is characterized in that: a wing plate is provided on each side of the stapler body, and each wing plate is provided with an opening, and the opening is a through hole.

[0008] The novel central venous catheter, wherein: the suturing device is movably mounted on the outer tube.

[0009] The novel central venous catheter is characterized in that: the suture device body is provided with a threaded through hole, and the suture device is threadably matched with the threaded section of the outer tube through the threaded through hole.

[0010] The novel central venous catheter has a through hole size of the inner tube slightly larger than that of the outer tube.

[0011] The novel central venous catheter comprises a connector including a front end, a middle part and a rear end, wherein the front end and the rear end are both provided with an internal thread hole; and the tail end of the outer tube is provided with an external thread for matching with the front end.

[0012] The novel central venous catheter has a radial dimension in the middle of the connector that is larger than the front and rear ends, and a friction pattern is provided in the middle of the connector.

[0013] The novel central venous catheter is characterized in that the tail of the inner tube is flush with the tail of the outer tube, or is slightly longer than the tail of the outer tube.

[0014] The novel central venous catheter is characterized in that: a size mark is provided on the front outer wall of the outer tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of a new central venous catheter. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1 , the specific implementation methods of the utility model are described in detail. The implementation methods are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. Obviously, the embodiments described in the utility model are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the utility model.

[0017] "One embodiment" or "some embodiments" described in this specification means that one or more embodiments of the present invention include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, in this specification, the terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0018] like Figure 1 As shown, the novel central venous catheter of the utility model comprises an outer tube 1 , an inner tube 2 and a connector 4 . The outer tube 1 is sleeved on the inner tube 2 , and the connector 4 is installed at the tail of the outer tube 1 .

[0019] The outer tube 1 includes a sharp head 11, which is a closed structure, and the inner tube 2 includes a head 21, which is a closed structure, and preferably the head 21 is also sharp. Optionally, the head 21 of the inner tube fits tightly with the head 11 of the outer tube, thereby improving the overall hardness of the head of the new central venous catheter. Optionally, the top of the head 21 of the inner tube and the top of the head 11 of the outer tube are both provided with a central hole, and the two central holes are through holes and interpenetrate each other.

[0020] A suture device 3 is provided in the middle of the outer tube 1, and a wing plate 31 is provided on each side of the body of the suture device 3, and each of the wing plates 31 is provided with an opening 32, and the opening 32 is a through hole. The suture device 3 can be fixedly mounted on the outer tube 1, and preferably can also be movably mounted on the outer tube 1. In this case, an external thread (not shown in the figure) is provided on the outer wall of the outer tube 1, and a through hole with an internal thread is provided on the body of the suture device 3 (not shown in the figure). The suture device 3 is threadedly matched with the threaded section with an external thread of the outer tube 1 through the threaded through hole, so that the suture device 3 can be moved on the outer tube 1.

[0021] A plurality of through holes 5 are formed on the front of the outer tube 1, and a plurality of through holes 6 are formed at corresponding positions on the front of the inner tube 2. The size of the through holes 6 is slightly larger than the through holes 5, so that the two through holes are aligned and interpenetrate each other. The number of through holes in the front of the outer tube 1 and the inner tube 2 is not less than 2, preferably 3. The outer wall of the front of the outer tube 1 is provided with size markings, which are in units of millimeters or centimeters, marking both the scale and the value.

[0022] The connector 4 includes a front end 41, a middle part 42 and a rear end 43, wherein the front end 41 and the rear end 43 are both provided with an internal threaded hole; the tail of the outer tube 1 is provided with a section of external thread for matching with the front end 41; the rear end 42 is used to connect with an extension tube or other in vitro injection or drainage components; the radial dimension of the middle part 42 of the connector is larger than that of the front end 41 and the rear end 43, and the middle part 42 of the connector is provided with friction grooves to prevent slipping.

[0023] The tail of the inner tube 2 is flush with the tail of the outer tube 1 , or slightly longer than the tail of the outer tube 1 .

[0024] When the new central venous catheter of the utility model is in use, the head and the front part are placed into the human body, and the through hole 32 on the wing plate 31 of the suture device 3 is used to pass the thread to sew the suture thread on the patient's skin. Since the position of the suture device 3 is adjustable, a suitable suturing position can be provided for patients of different heights and body shapes; if the catheter is blocked, the middle part 42 of the connector 4 can be screwed to remove the front end 41 from the outer tube, and then the tail of the inner tube 2 can be clamped by tweezers to draw out the inner tube 2. Since the blockage blocks the mutually interpenetrating through holes of the outer tube and the inner tube at the same time and has a certain viscosity, when the inner tube is drawn out, the blockage blocking the outer tube and the inner tube can be taken out together, and then the connector 4 can be installed to restore the infusion or drainage function again, reducing the number of frequent tube changes and tube placements due to blockage, alleviating the patient's pain and improving safety.

[0025] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A novel central venous catheter, characterized in that: It includes an outer tube, an inner tube and a joint; the outer tube is sleeved on the inner tube and the inner tube can be pulled out of the outer tube, and the joint is installed at the tail of the outer tube; a plurality of through holes are opened on the front of the outer tube, and a plurality of through holes are also opened at the corresponding positions on the front of the inner tube; a suturing device is provided in the middle of the outer tube, and the head of the outer tube is sharp.

2. The novel central venous catheter according to claim 1, characterized in that: The head of the outer tube is closed, or the tops of the heads of the inner tube and the outer tube are both provided with a central hole, and the two central holes are through holes and interpenetrate each other.

3. The novel central venous catheter according to claim 1, characterized in that: A wing plate is respectively arranged on both sides of the stapler body, and each of the wing plates is provided with an opening, which is a through hole.

4. The novel central venous catheter according to claim 1, characterized in that: The stapler is movably mounted on the outer tube.

5. The novel central venous catheter according to claim 3 is characterized in that: The stapler body is provided with a threaded through hole, and the stapler is threadably matched with the threaded section of the outer tube through the threaded through hole.

6. The novel central venous catheter according to claim 1, characterized in that: The through hole size of the inner tube is slightly larger than the through hole size of the outer tube.

7. The novel central venous catheter according to claim 1, characterized in that: The joint comprises a front end, a middle part and a rear end, wherein the front end and the rear end are both provided with an internal thread hole; the tail end of the outer tube is provided with a section of external thread for matching with the front end.

8. The novel central venous catheter according to claim 7, characterized in that: The radial dimension of the middle part of the joint is larger than the front end and the rear end, and the middle part of the joint is provided with friction lines.

9. The novel central venous catheter according to claim 1, characterized in that: The tail of the inner tube is flush with the tail of the outer tube, or slightly longer than the tail of the outer tube.

10. The novel central venous catheter according to claim 1, characterized in that: The outer wall at the front of the outer tube is provided with size markings.

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