CN210078572U

CN210078572U - Central venous catheter

Info

Publication number: CN210078572U
Application number: CN201920656816.8U
Authority: CN
Inventors: 桂红; 王江华
Original assignee: Dongguan Dikai Medical Technology Co Ltd
Current assignee: Dongguan Dikai Medical Technology Co Ltd; DONGGUAN DIKAI MEDICAL CO Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2020-02-18
Anticipated expiration: 2029-05-09

Abstract

The utility model relates to the technical field of medical equipment, a central venous catheter is disclosed, including being responsible for, be provided with the side opening on being responsible for's the pipe wall, soft head is connected to being responsible for's one end, and the other end passes through connecting piece connecting branch pipe, and the one end that the branch pipe does not link to each other with being responsible for is provided with locking joint, and the one end that is responsible for and soft head links to each other is provided with first grafting structure, and soft head is provided with second grafting structure with the one end that is responsible for and links to each other, and first grafting structure and second. This central venous catheter has increased the area of contact of being responsible for and soft head, makes the different person in charge of hardness and soft head between form one section longer changeover portion, when the pipe when the intraductal propelling movement, the bending stress point enlarges into great an area, makes the anti bending strength who is responsible for the junction with soft head obtain greatly improving, can avoid soft head to split effectively, separate and the bad conditions such as drop, the security performance of product is showing to improve to reduce the risk to minimumly.

Description

Central venous catheter

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a central venous catheter.

Background

A Central Venous Catheter (Central Venous Catheter), which is one of intravascular catheters, is placed in a large vein. The device is commonly used for measuring central venous pressure, performing massive and rapid venous transfusion in emergency treatment or operations with large blood loss, establishing a transfusion passage for severe patients and patients with long-term or repeated transfusion, a hemodialysis pipeline and the like in clinic.

Compared with the traditional transfusion and blood transfusion mode, the central venous catheter has the advantages of large transfusion and blood transfusion amount and rapidness, has the main function of directly inputting blood or liquid medicine into the central vein, has obvious effect advantage of maintaining blood pressure particularly in major operation or emergency treatment, and can be kept for a long time for patients needing long-term or repeated transfusion, thereby effectively avoiding the pain caused by repeated puncture. In addition, some drugs that are more irritating to peripheral veins (venules) may also be injected through the central venous catheter.

In general, the distal portion of the central venous catheter will have a soft tip, and the main tube and the soft tip of the conventional central venous catheter are welded together by butt welding, i.e. the main tube and the annular portion of the branch tube are heated and melted after butt-joint and anastomosis, and then the main tube and the branch tube are welded together. The contact surface of the main pipe and the branch pipe is small in the welding mode, the tension after welding is limited, and the influence on the product quality is of great importance, because the magnitude of the soft head tension is the most important physical performance index for measuring the central venous catheter and is directly related to the safety performance of the catheter. If the welding tension is too low, the hose may fall off, resulting in an even greater hazard.

Secondly, the butt welding mode has short welding length, the strength of the catheter at the welding position has obvious attenuation due to different hardness of the main pipe and the soft head, the catheter is certainly bent in the pushing process due to the fact that the blood vessel is bent in the using process, stress points are generally concentrated at the welding position, and the soft head and the main pipe can crack and separate or even fall off due to the fact that the length of the welding position is short and the bending strength is low, so that great risk is brought to a patient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a central venous catheter has increased the area of contact who is responsible for with soft head, prevents that soft head and person in charge from splitting, separating, causes to drop even, brings very big risk for the patient.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a central venous catheter, which comprises a main pipe, be provided with the side opening on the pipe wall of being responsible for, the soft head is connected to the one end of being responsible for, and the other end passes through connecting piece connecting branch pipe, the branch pipe not with the one end that is responsible for linking to each other is provided with locking joint, be responsible for with the one end that soft head links to each other is provided with first grafting structure, soft head with the one end that is responsible for linking to each other is provided with second grafting structure, first grafting structure with second grafting structure pegs graft mutually.

This central venous catheter is through setting up first grafting structure on being responsible for, soft overhead second grafting structure that sets up, first grafting structure is pegged graft mutually with second grafting structure, the area of contact of being responsible for and soft head has been increased, make the different person in charge of hardness and soft head between form one section longer changeover portion, when the pipe is at intravascular propelling movement, the bending stress point enlarges into a great region, the anti buckling strength who makes the junction of being responsible for and soft head obtains greatly improving, can avoid soft head to split effectively, bad conditions such as separation and drop, the security performance of product is obviously improved, and fall to minimumly with the risk.

As a preferable embodiment of the central venous catheter, the first insertion structure includes a plurality of first insertion blocks arranged in the circumferential direction of the main tube, the second insertion structure includes a plurality of second insertion blocks arranged in the circumferential direction of the soft head, the first insertion blocks are inserted between the second insertion blocks on the soft head, and the second insertion blocks are inserted between the first insertion blocks on the main tube.

Through being responsible for a plurality of first insertion block on the circumference and a plurality of second insertion block on the soft head and pegging graft mutually, strengthen being responsible for the area of contact with soft head.

As a preferable mode of the central venous catheter, the plurality of first insertion blocks on the main tube are uniformly distributed along the circumferential direction of the main tube, and the plurality of second insertion blocks on the soft head are uniformly distributed along the circumferential direction of the soft head.

As a preferable mode of the central venous catheter, the first insertion block and the second insertion block are both in a sawtooth structure, and the first insertion block and the second insertion block are engaged with each other. The structure is simple and easy to prepare.

As a preferable mode of the central venous catheter, a joint of the first insertion block and the second insertion block is in a wavy line structure. The structure is simple and easy to prepare.

As a preferable embodiment of the central venous catheter, the first insertion structure and the main tube are integrally formed, and the second insertion structure and the soft head are integrally formed. The structure is strong in strength.

As a preferable mode of the above central venous catheter, the main tube and the soft tip are welded integrally by heat welding. The main pipe and the soft head are welded into a whole through hot welding, and the connection of the main pipe and the soft head is realized.

As a preferable mode of the central venous catheter, the main tube is connected with a plurality of branch tubes through the connecting piece, and the locking joint is arranged on each branch tube. The person in charge can realize the connection of a plurality of branch pipes through the connecting piece, is convenient for use as required.

As a preferable mode of the above central venous catheter, the outer diameter of the soft head is reduced from the end of the soft head connected to the main tube to the end of the soft head not connected to the main tube. The arrangement ensures that the catheter is smoother during puncture and easier to enter blood vessels, thereby reducing the pain of patients.

As a preferable scheme of the central venous catheter, the main tube and the soft head are both made of polyurethane or silicon rubber soft high polymer materials.

The utility model has the advantages that:

the utility model provides a central venous catheter, through set up first grafting structure on being responsible for, soft overhead second grafting structure that sets up, first grafting structure is pegged graft mutually with second grafting structure, the area of contact who is responsible for and soft head has been increased, make the different person in charge of hardness and soft overhead one section longer changeover portion of formation, when the pipe is at intravascular propelling movement, crooked stress point enlarges into a great region, the anti bending strength who makes the junction of being responsible for and soft head obtains greatly improving, can avoid soft head to split effectively, bad conditions such as separation and drop, the security performance of product is obviously improved, and fall to minimum with the risk.

Drawings

Fig. 1 is a schematic structural diagram of a central venous catheter provided by the present invention;

fig. 2 is an enlarged schematic view of fig. 1 at a according to the present invention;

fig. 3 is a schematic structural view of the central venous catheter main tube and the soft head to be connected;

fig. 4 is an enlarged schematic view of the present invention at B in fig. 3.

In the figure:

1. a main pipe; 2. softening the head; 3. a branch pipe; 4. a connecting member; 5. locking the joint;

11. a side hole; 12. a first plug-in structure; 21. a second plug-in structure;

121. a first plug-in block; 211. and a second plug-in block.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The present embodiment provides a central venous catheter, as shown in fig. 1-4, the central venous catheter comprises a main tube 1, a side hole 11 is arranged on the tube wall of the main tube 1, one end of the main tube 1 is connected with a soft head 2, the other end is connected with a branch tube 3 through a connecting piece 4, one end of the branch tube 3 which is not connected with the main tube 1 is provided with a locking joint 5, one end of the main tube 1 which is connected with the soft head 2 is provided with a first inserting structure 12, one end of the soft head 2 which is connected with the main tube 1 is provided with a second inserting structure 21, the first inserting structure 12 is inserted with the second inserting structure 21, the contact area of the main tube 1 and the soft head 2 is increased, a long transition section is formed between the main tube 1 and the soft head 2 with different hardness, when the catheter is pushed in a blood vessel, the bending stress point is expanded to a large area, so that the bending strength of the joint of the main tube 1, can effectively avoid the bad conditions of cracking, separating and falling off of the soft head 2, remarkably improve the safety performance of the product and reduce the risk to the minimum. In the present embodiment, the first insertion structure 12 is integrally formed with the main pipe 1, and the second insertion structure 21 is integrally formed with the flexible head 2. The structure is strong in strength.

In this embodiment, one end of the main tube 1 close to the soft head 2 is provided with a plurality of side holes 11 for improving the efficiency of drug delivery.

As shown in fig. 4, the first inserting structure 12 includes a plurality of first inserting blocks 121 disposed on the circumference of the main pipe 1, the second inserting structure 21 includes a plurality of second inserting blocks 211 disposed on the circumference of the flexible joint 2, the first inserting blocks 121 are inserted between the second inserting blocks 211 on the flexible joint 2, and the second inserting blocks 211 are inserted between the first inserting blocks 121 on the main pipe 1. The contact area between the main pipe 1 and the soft head 2 is increased by inserting the plurality of first inserting blocks 121 on the circumferential direction of the main pipe 1 and the plurality of second inserting blocks 211 on the soft head 2. Preferably, the plurality of first insertion blocks 121 on the main pipe 1 are uniformly distributed along the circumferential direction of the main pipe 1, and the plurality of second insertion blocks 211 on the soft head 2 are uniformly distributed along the circumferential direction of the soft head 2. In this embodiment, the first insertion block 121 and the second insertion block 211 are both saw-tooth structures, and the first insertion block 121 and the second insertion block 211 are engaged with each other. The structure is simple, the preparation is easy, and the contact area between the main pipe 1 and the soft head 2 is increased. In other embodiments, the joint of the first insertion block 121 and the second insertion block 211 is a wavy line structure, which is simple and easy to manufacture, and can also increase the contact area between the main pipe 1 and the soft head 2.

Be responsible for 1 and soft head 2 and pass through the hot welding butt fusion as an organic whole, after first grafting structure 12 and second grafting structure 21 pegged graft mutually, be responsible for 1 and soft head 2 and pass through the hot welding butt fusion as an organic whole, realized being responsible for 1 and soft first 2 connection.

Preferably, the main pipe 1 is connected to a plurality of branch pipes 3 by connecting members 4, and each branch pipe 3 is provided with a locking joint 5. The main pipe 1 can realize the connection of a plurality of branch pipes 3 through the connecting piece 4, and is convenient to use according to the requirement. Preferably, in the present embodiment, the locking joint 5 is a luer locking joint.

The outer diameter of the soft head 2 decreases from the end of the soft head 2 connected to the main pipe 1 to the end of the soft head 2 not connected to the main pipe 1. This setting makes the pipe more smooth when the puncture, gets into the blood vessel more easily, reduces patient's misery, and soft head 2 has slick and sly pointed end, prevents that the pipe from haring the vascular wall.

Preferably, the main tube 1 and the soft head 2 are both made of polyurethane or silicon rubber soft polymer material. The soft head 2 is softer than the main tube 1.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a central venous catheter, is including being responsible for (1), be provided with side opening (11) on the pipe wall of being responsible for (1), be responsible for the one end of (1) and connect soft head (2), the other end passes through connecting piece (4) connecting branch pipe (3), branch pipe (3) do not with the one end that is responsible for (1) and links to each other is provided with locking joint (5), a serial communication port, be responsible for (1) with the one end that soft head (2) link to each other is provided with first grafting structure (12), soft head (2) with the one end that is responsible for (1) and links to each other is provided with second grafting structure (21), first grafting structure (12) with second grafting structure (21) are pegged graft mutually.

2. Central venous catheter according to claim 1, characterised in that the first plug-in structure (12) comprises a plurality of first plug-in blocks (121) arranged circumferentially on the main tube (1), the second plug-in structure (21) comprises a plurality of second plug-in blocks (211) arranged circumferentially on the soft head (2), the first plug-in blocks (121) being plugged between the second plug-in blocks (211) on the soft head (2), the second plug-in blocks (211) being plugged between the first plug-in blocks (121) on the main tube (1).

3. Central venous catheter according to claim 2, characterised in that the first plug-in blocks (121) on the main tube (1) are evenly distributed in the circumferential direction of the main tube (1) and the second plug-in blocks (211) on the soft head (2) are evenly distributed in the circumferential direction of the soft head (2).

4. The central venous catheter as claimed in claim 2, characterized in that the first and second plug-in blocks (121, 211) are each of a saw-tooth structure, the first and second plug-in blocks (121, 211) engaging.

5. The central venous catheter as claimed in claim 2, characterized in that the junction of the first and second plug-in blocks (121, 211) is of a wavy line structure.

6. Central venous catheter according to any of the claims 1 to 5, characterised in that the first plug-in structure (12) is formed integrally with the main tube (1) and the second plug-in structure (21) is formed integrally with the soft head (2).

7. Central venous catheter according to any of the claims 1 to 5, characterised in that the main tube (1) and the soft head (2) are welded together by heat welding.

8. Central venous catheter according to any of the claims 1 to 5, characterised in that the main tube (1) is connected to a number of branch tubes (3) by means of the connecting piece (4), the locking joint (5) being provided on each branch tube (3).

9. Central venous catheter according to any of the claims 1 to 5, characterised in that the outer diameter of the soft head (2) decreases from the end of the soft head (2) connected to the main tube (1) to the end of the soft head (2) not connected to the main tube (1).

10. Central venous catheter according to any of the claims 1 to 5, characterised in that the main tube (1) and the soft head (2) are made of polyurethane or silicone rubber soft polymer material.