CN211535897U

CN211535897U - Central venous catheter

Info

Publication number: CN211535897U
Application number: CN201922159648.4U
Authority: CN
Inventors: 翟春春
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-09-22
Anticipated expiration: 2029-12-05

Abstract

The application provides a central venous catheter, belongs to the medical instrument field. It includes central body, and one of central body is served and is installed the connection tubule that a plurality of intervals set up, has cup jointed dialysis nature cover bag on the other end, is connected with the thin pipe of cavity on the dialysis nature cover bag, and the thin pipe of cavity communicates with dialysis nature cover bag. The device simple structure, it is convenient to use, can form an environment that is rich in the anticoagulant through the dialysis cuff in central body periphery to realize the effect of prevention thrombosis.

Description

Central venous catheter

Technical Field

The application relates to the field of medical equipment, in particular to a central venous catheter.

Background

The central venous catheter is an indispensable tool for clinical work to undergo major operations, major trauma, parenteral nutrition, radiotherapy and chemotherapy of malignant tumors, dialysis treatment of patients with renal failure and the like, and needs to be left in the body of the patients for 1 week, 2 weeks or longer.

However, the currently used central venous catheter itself has no anticoagulation effect, and during the indwelling period in the body of a patient, it acts as a foreign body to stimulate and activate the coagulation system of the body, and thrombus is formed inside and on the outer wall of the catheter.

At present, the tube washing and sealing operation which is commonly used clinically can only be used for reducing and preventing the formation of thrombus inside the catheter, but the thrombus formation on the outer wall of the catheter cannot be interfered. Clinical work has found that most patients become thrombosed after several days of intravenous catheter indwelling and that conventional systemic anticoagulation does not dissolve it. When the catheter is pulled out, the catheter passes through a narrow vascular outer wall opening and a muscle gap channel, and once the catheter falls off, myocardial infarction, cerebral apoplexy and pulmonary embolism can occur, so that the life safety of a patient is seriously threatened, and a large amount of unnecessary medical resources are consumed.

Therefore, a tool for preventing thrombus formation outside the catheter is needed.

SUMMERY OF THE UTILITY MODEL

The invention aims to provide a central venous catheter, aiming at solving the technical problem that the conventional central venous catheter used clinically cannot prevent thrombus formation outside the catheter.

The technical scheme of the application is as follows:

the utility model provides a central venous catheter, includes central body, one of central body is served and is installed the connection tubule that a plurality of intervals set up, has cup jointed dialysis nature cover bag on the other end, be connected with the thin pipe of cavity on the dialysis nature cover bag, the thin pipe of cavity with dialysis nature cover bag intercommunication.

As a technical scheme of this application, there are 2 or 3 connecting tubules.

As a technical scheme of this application, movably install on the connecting tubule and be used for opening or close the spacing clamp of connecting tubule.

As a technical scheme of this application, install the passageway interface on the free end of connecting the tubule.

As a technical scheme of the application, a one-way pressure valve is detachably arranged on the end part of the hollow thin catheter and used for conveying an anticoagulation solution into the dialysis cuff.

In one embodiment of the present invention, the material of the dialysis cuff includes a dialysis membrane material.

The beneficial effect of this application:

in the central venous catheter of this application, it cup joints a cuff that is formed by the preparation of dialysis membrane material through having the center tube body of a plurality of connection tubules outward, and the cuff is through the external pressure valve of a cavity thin pipe simultaneously, and the pressure valve is one-way circulation, alright from outside-in circulation infusion anticoagulant solution. The hollow thin catheter is positioned at the outer side of the central catheter body, so that the internal gas of the hollow thin catheter can be pumped out through the injector before being placed into a patient body, the hollow thin catheter is tightly attached to the central catheter body, after the hollow thin catheter is placed into the patient body, the tail part of the hollow thin catheter is connected with the disposable infusion pump through the one-way pressure valve interface, the infusion pump is internally provided with anticoagulant drug solution with proper concentration, a certain amount of anticoagulant drug is continuously infused into the cuff, and the anticoagulant drug in the cuff is slowly released outwards under the driving of pressure, so that the aim of preventing thrombosis can be effectively fulfilled; the cuff on the periphery of the central tube body is made of a dialysis membrane material, the dialysis membrane is a porous permeable membrane, and the anticoagulant drug solution can be allowed to gradually seep out from the cuff under the action of pressure, so that an environment rich in anticoagulant drug is formed on the periphery of the central tube body, and the aim of preventing thrombosis is fulfilled; the purpose of preventing the thrombus formation on the outer wall of the catheter is achieved by continuously infusing the anticoagulation medicine into the cuff while the blood transfusion and the fluid infusion of the central tube body are not influenced. Because the pressure in the cuff is higher than the pressure in the external blood vessel, the dialysis membrane of the cuff mainly shows the permeation of the anticoagulant drugs to the outside; even if small molecular substances in blood enter the cuff, the small molecular substances cannot change various blood components of the patient due to the small volume of the cuff; and the material of the dialysis membrane comprises a plurality of tiny holes, so that each part of the cuff can be passed by the anticoagulant drug, thereby effectively preventing the thrombosis on the outer wall of the central tube body. In addition, the interfaces of the tail ends of the connecting thin tubes of the central tube body are respectively collected at the front section of the central tube body through respective independent channels, and the tail part of each connecting thin tube is provided with a limiting clamp for opening or closing the connecting thin tube, so that the channel is blocked or opened.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic structural diagram of a central venous catheter provided in an embodiment of the present application;

FIG. 2 is a schematic view of a connection structure of the central tube and the cuff provided in the embodiment of the present application.

Icon: 1-central venous catheter; 2-a central tube body; 3-connecting a thin tube; 4-a dialysis cuff; 5-hollow thin catheter; 6-a limit clamp; 7-channel interface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper" and "lower" are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation and operation, and thus, should not be construed as limiting the present application.

Further, in the present application, unless expressly stated or limited otherwise, the first feature may be directly contacting the second feature or may be directly contacting the second feature, or the first and second features may be contacted with each other through another feature therebetween, not directly contacting the second feature. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example (b):

referring to fig. 1 and fig. 2, the present application provides a central venous catheter 1, which mainly includes a central catheter body 2, wherein one end of the central catheter body 2 is provided with a plurality of connecting thin tubes 3 arranged at intervals, the other end is sleeved with a dialysis cuff 4, the dialysis cuff 4 is connected with a hollow thin catheter 5, and the hollow thin catheter 5 is communicated with the dialysis cuff 4. The connecting tubules 3 that a plurality of intervals set up communicate with central body 2 respectively, and its junction installs switching valve for open or close central body 2.

In this embodiment, 2 or 3 connecting tubules 3 may be used.

In this embodiment, a limiting clamp 6 for opening or closing the connecting tubule 3 is movably installed on the connecting tubule 3, and the connecting tubule 3 is communicated with or isolated from the central tube body 2 by opening or closing the limiting clamp 6, so as to block or open the passage.

In the present embodiment, a channel port 7 is attached to the free end of the connecting narrow tube 3, and the connecting narrow tube is connected to a medical syringe, an infusion set, a blood transfusion set, or the like through the channel port 7.

It should be noted that, in this embodiment, the dialysis cuff 4 is about 10cm long, or 15cm long, or 20cm long, and is made of a dialysis membrane material, and the dialysis membrane is a porous permeable membrane, which allows the anticoagulant solution to gradually seep out from the cuff under the action of pressure, so as to form an environment rich in anticoagulant at the periphery of the central tube 2, thereby achieving the purpose of preventing thrombosis. Because the pressure in the cuff is higher than the pressure in the external blood vessel, the dialysis membrane of the cuff mainly shows the permeation of the anticoagulant drugs to the outside; even if small molecular substances in blood enter the cuff, the small molecular substances do not change various blood components of the patient due to the small volume of the cuff; and the material of the dialysis membrane comprises a plurality of tiny holes, so that each part of the cuff can be passed by the anticoagulant drug, thereby effectively preventing the thrombosis on the outer wall of the central tube body 2.

In this embodiment, a one-way pressure valve is attached to the end of the hollow thin catheter 5, and the one-way pressure valve is in one-way flow communication and can be used to deliver an anticoagulant solution to the dialysis cuff 4 by way of outside-in flow communication. Because the hollow thin catheter 5 is positioned at the outer side of the central tube body 2, the internal gas of the hollow thin catheter 5 can be pumped out through the injector before being placed into a patient body, so that the hollow thin catheter 5 is tightly attached to the central tube body 2, after being placed into the patient body, the tail part of the hollow thin catheter 5 is connected with a disposable infusion pump through a one-way pressure valve interface, the infusion pump is internally provided with anticoagulant drug solution with proper concentration, a certain amount of anticoagulant drug is continuously infused into the cuff, and the anticoagulant drug in the cuff is slowly released outwards under the driving of pressure, so that the aim of preventing thrombosis can be effectively achieved.

Therefore, in the central venous catheter 1 of the application, it connects one by the cuff that the dialysis membrane material was made through 2 overcoat at the central body that have a plurality of connecting tubules 3, and the cuff is through the external pressure valve of the thin pipe 5 of cavity simultaneously, and the pressure valve is one-way circulation, alright from outside inside circulation infusion anticoagulant solution. Because the hollow thin catheter 5 is positioned at the outer side of the central tube body 2, the internal gas of the hollow thin catheter 5 can be pumped out through an injector before being placed into a patient body, so that the internal gas is tightly attached to the central tube body 2, after the hollow thin catheter 5 is placed into the patient body, the tail part of the hollow thin catheter 5 is connected with a disposable infusion pump through a one-way pressure valve interface, an anticoagulant medicine solution with proper concentration is filled in the infusion pump, a certain amount of anticoagulant medicine is continuously infused into the cuff, and the anticoagulant medicine in the cuff is slowly released outwards under the driving of pressure, so that the aim of preventing thrombosis can be effectively fulfilled; the cuff on the periphery of the central tube body 2 is made of a dialysis membrane material, the dialysis membrane is a porous permeable membrane, and the anticoagulation medicine solution can be allowed to gradually seep out from the cuff under the action of pressure, so that an environment rich in anticoagulation medicine is formed on the periphery of the central tube body 2, and the aim of preventing thrombosis is fulfilled; while the blood transfusion and the fluid transfusion of the central tube body 2 are not influenced, the anticoagulation medicine is continuously infused into the cuff, thereby achieving the purpose of preventing the thrombus formation on the outer wall of the catheter. Because the pressure in the cuff is higher than the pressure in the external blood vessel, the dialysis membrane of the cuff mainly shows the permeation of the anticoagulant drugs to the outside; even if small molecular substances in blood enter the cuff, the small molecular substances cannot change various blood components of the patient due to the small volume of the cuff; and the material of the dialysis membrane comprises a plurality of tiny holes, so that each part of the cuff can be passed by the anticoagulant drug, thereby effectively preventing the thrombosis on the outer wall of the central tube body 2. In addition, the interfaces of the tail ends of the connecting tubules 3 of the central tube body 2 are respectively collected at the front section of the central tube body 2 through respective independent channels, and the tail part of each connecting tubule 3 is provided with a limit clamp 6 for opening or closing the connecting tubule 3, so as to block or open the channel.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a central venous catheter, its characterized in that, includes central body, one of central body is served and is installed the connection tubule that a plurality of intervals set up, has cup jointed dialysis nature cover bag on the other end, be connected with the thin pipe of cavity on the dialysis nature cover bag, the thin pipe of cavity with dialysis nature cover bag intercommunication.

2. The central venous catheter of claim 1, wherein there are 2 or 3 of the connecting tubules.

3. The central venous catheter as claimed in claim 1, wherein a limit clamp for opening or closing the connecting tubule is movably mounted on the connecting tubule.

4. The central venous catheter of claim 1, wherein a channel interface is mounted on a free end of the connecting tubule.

5. The central venous catheter as claimed in claim 1 wherein a one-way pressure valve is removably mounted on the end of the hollow fine catheter for delivery of anticoagulation solution into the dialysis cuff.

6. The central venous catheter of claim 1 wherein the material of the dialysis cuff comprises a dialysis membrane material.