CN115501409A - Triple lumen central venous blood purification catheter device - Google Patents

Abstract

The invention discloses a three-chamber central venous blood purification catheter device, which comprises a main catheter, a fixed sleeve, a first blood purification connecting pipe, a second blood purification connecting pipe and a delivery connecting pipe. The plate divides the inner cavity of the main catheter into the first blood guide chamber, the second blood guide chamber and the delivery guide chamber. One end of the main catheter is connected to the fixed sleeve, and the first blood purification connecting tube and the second blood purification tube are also connected to the fixed sleeve. Purification connection tube and delivery connection tube, the delivery connection tube communicates with the delivery guide cavity through the fixed sleeve, the first blood purification connection tube communicates with the second blood guide cavity through the fixation sleeve, and the second blood purification connection tube communicates with the first blood guide cavity through the fixation sleeve. The guide cavity is connected. The present invention has the functions of central venous access and blood purification at the same time, solves the problems of bleeding and infection caused by secondary catheterization, and can reduce the blood recirculation ratio.

Description

Triple lumen central venous blood purification catheter device

technical field

The invention relates to a catheter device, in particular to a three-cavity central venous blood purification catheter device.

Background technique

Central venous catheterization to establish temporary blood access for bedside blood purification and other treatments has been widely used in acute poisoning, acute and chronic renal failure and other acute and critically ill patients. At present, most of the blood purification catheters commonly used in clinical practice are double-lumen tubes, and the inner diameter of the catheter is relatively thick, and the intravenous infusion is usually slow. Using a thicker catheter for slow infusion is easy to form thrombus, and it is difficult to complete the functions of intravenous administration. Therefore, only It is used for temporary blood purification treatment, and it is left unattended most of the time. However, because such critically ill patients who need bedside blood purification treatment often need intravenous infusion and medication, and some need to monitor central venous pressure, clinically, other parts are often selected for puncture and catheterization again. At the same time, the currently commonly used central venous catheterization technology mostly adopts the Seldinger technique, that is, the puncture needle penetrates the front and rear walls of the blood vessel, withdraws the needle core, slowly pulls out the needle until blood spurts from the tail of the needle, inserts the guide wire quickly, and pulls out the needle. , into the catheter through a guide wire. During the process of inserting the catheter along the guide wire, due to the large inner diameter of commonly used catheters, more blood is usually gushed out along the catheter, and the risk of infection is higher.

The currently commonly used temporary venous blood purification catheters have the following disadvantages: most of them are double-lumen structures, and it is difficult to realize the functions of intravenous infusion/administration and blood purification at the same time; they often need to be used together with other intravenously inserted central venous catheters at the same time, and the cost of catheterization is relatively high. High, the patient needs to undergo multiple catheterization operations, which is likely to cause multiple injuries to the patient's blood vessels; the catheterization process is prone to bleeding, and the risk of air embolism and infection is high; the blood recirculation rate of the catheter side hole design is high, which is easy to cause catheter blockage .

Contents of the invention

The purpose of the present invention is to provide a three-chamber central venous blood purification catheter device to solve the technical problems in the prior art. It has both central venous access and blood purification functions, and solves the bleeding and infection problems caused by secondary catheterization , can reduce the blood recirculation ratio.

The invention provides a three-chamber central venous blood purification catheter device, which includes a main catheter, and also includes a fixed sleeve, a first blood purification connecting tube, a second blood purification connecting tube and a delivery connecting tube, the main catheter is provided with a partition plate, the partition plate divides the lumen of the main catheter into a first blood guide chamber, a second blood guide chamber and a delivery guide chamber, one end of the main catheter is connected to the fixed sleeve, and the fixed sleeve The first blood purification connection tube, the second blood purification connection tube and the delivery connection tube are also connected to it, the delivery connection tube communicates with the delivery guide cavity through the fixing sleeve, and the first The blood purification connecting tube communicates with the second blood guiding cavity through the fixed sleeve, and the second blood purification connecting tube communicates with the first blood guiding cavity through the fixing sleeve.

In the aforementioned three-lumen central venous blood purification catheter device, preferably, the end of the main catheter away from the fixed sleeve is a tip, and the end of the tip is formed with a first blood guide hole, a second blood guide hole and a delivery port. A guide hole, the first blood guide hole communicates with the second blood guide cavity, the second blood guide hole communicates with the first blood guide cavity, and the delivery guide hole communicates with the delivery guide cavity.

In the aforementioned three-lumen central venous blood purification catheter device, preferably, a first blood guiding side hole and a second blood guiding side hole are opened on the side wall of the main catheter close to the tip, and the first blood guiding side hole The second blood guiding side hole communicates with the first blood guiding cavity, and the second blood guiding side hole communicates with the second blood guiding cavity.

In the aforementioned three-lumen central venous blood purification catheter device, preferably, the first blood guiding lumen and the second blood guiding lumen have the same size, and they are mirror-symmetrical with respect to the partition plate. The sectional area of a blood guiding cavity is equal to the sectional area of the second blood guiding cavity and larger than the sectional area of the delivery guiding cavity.

In the aforementioned three-lumen central venous blood purification catheter device, preferably, a first blood guiding oblique section is formed on the outer tube wall of the first blood guiding hole, and a first blood guiding oblique section is formed on the outer tube wall of the second blood guiding hole. The second blood-guiding beveled surface, the inclination direction of the first blood-guiding beveled surface and the second blood-guiding beveled surface are opposite.

In the aforementioned three-lumen central venous blood purification catheter device, preferably, the fixing sleeve includes a conical section and three connectors, one end of the conical section is connected to the main catheter, and the other end of the conical section is connected to the main catheter. The three connecting heads are fixedly connected, and the three connecting heads are respectively connected to the first blood purification connecting tube, the second blood purification connecting tube and the delivery connecting tube, and three connectors are formed in the fixing sleeve. Connection channel.

In the aforementioned three-lumen central venous blood purification catheter device, preferably, a fixing buckle is rotatably mounted on the conical section of the fixing sleeve.

In the aforementioned three-lumen central venous blood purification catheter device, preferably, the first blood purification connecting tube is provided with a first stop card, and the second blood purification connecting tube is provided with a second stop card, so A third flow stop card is provided on the delivery connecting pipe.

In the aforementioned three-lumen central venous blood purification catheter device, preferably, it further includes two occluder cores, the tail end of the occluder cores is formed with a take-out end, and the surface of the take-out end is formed with threads.

Compared with the prior art, the present invention includes a main conduit, a fixing sleeve, a first blood purification connecting pipe, a second blood purification connecting pipe and a delivery connecting pipe, and a partition plate is arranged inside the main conduit, and the partition plate will divide the inside of the main conduit. The lumen is divided into the first blood guide lumen, the second blood guide lumen and the delivery guide lumen. One end of the main catheter is connected to the fixed sleeve, and the fixed sleeve is also connected with the first blood purification connecting tube, the second blood purification connecting tube and the delivery connection. The delivery connection tube communicates with the delivery guide cavity through the fixed sleeve, the first blood purification connection tube communicates with the second blood guide cavity through the fixation sleeve, and the second blood purification connection tube communicates with the first blood guide cavity through the fixation sleeve. In the present invention, a first blood guide cavity, a second blood guide cavity and a transport guide cavity are arranged in the main catheter. Through the three-cavity structure, the present invention can be used for bedside non-tunnel type central venous blood purification catheter, which is easy to operate and can avoid placing It can reduce the risk of air embolism, reduce the recirculation rate, and can be used for central venous administration, blood transfusion, infusion, etc. The invention has various functions, convenient operation, flexible use and low manufacturing cost, can effectively improve clinical practicability and is beneficial to further popularization and application.

Description of drawings

Fig. 1 is an axonometric view of the present invention;

Fig. 2 is the cross-sectional structure schematic diagram of main conduit;

Figure 3 is an enlarged view of the tip of the main catheter;

Fig. 4 is a schematic plan view of the main conduit;

Fig. 5 is a schematic structural view of the plugging core tip;

Figure 6 is an axonometric view of the plugging core tip;

Fig. 7 is an axonometric view of the overall structure of the plugging core.

Explanation of reference numerals: main catheter 1, fixed sleeve 2, first blood purification connecting tube 3, second blood purification connecting tube 4, delivery connecting tube 5, partition plate 6, first blood guiding chamber 7, second blood guiding tube Cavity 8, delivery guide cavity 9, first blood guide hole 10, second blood guide hole 11, delivery guide hole 12, first blood guide side hole 13, second blood guide side hole 14, first blood guide oblique cut surface 15 , The second blood guiding oblique cut surface 16, the first stop card 17, the second stop card 18, the third stop card 19, the plugging core 20, the removal end 21, and the fixing buckle 22.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Embodiment of the present invention: as shown in Figures 1-7, a three-lumen central venous blood purification catheter device includes a main catheter 1, a fixed sleeve 2, a first blood purification connecting tube 3, and a second blood purification connecting tube 4 and the delivery connecting pipe 5, the main conduit 1 is provided with a partition plate 6, the partition plate 6 runs through the main conduit 1, and the partition plate 6 divides the lumen of the main conduit 1 into a first blood guide chamber 7, a second blood The guide cavity 8 and the delivery guide cavity 9, one end of the main catheter 1 is connected with the fixed sleeve 2, and the fixed sleeve 2 is also connected with the first blood purification connecting tube 3, the second blood purification connecting tube 4 and the delivery connecting tube 5, the delivery connection The tube 5 communicates with the delivery guide cavity 9 through the fixed sleeve 2, the first blood purification connecting tube 3 communicates with the second blood guide cavity 8 through the fixed sleeve 2, and the second blood purification connecting tube 4 communicates with the first blood guide cavity through the fixed sleeve 2 7 connected.

In the present invention, by setting the first blood guiding cavity 7, the second blood guiding cavity 8 and the delivery guiding cavity 9, the present invention can simultaneously have the functions of central venous access and blood purification. There is no need to place a second catheter on the patient, effectively solving the problems of bleeding and infection during the second catheterization in the prior art.

In a specific embodiment, the end of the main catheter 1 away from the fixed sleeve 2 is a tip, and the end of the tip is formed with a first blood guide hole 10, a second blood guide hole 11 and a delivery guide hole 12. The hole 10 communicates with the second blood guide cavity 8 , the second blood guide hole 11 communicates with the first blood guide cavity 7 , and the transport guide hole 12 communicates with the transport guide cavity 9 . On the side wall of the main catheter 1 close to the tip, a first blood guiding side hole 13 and a second blood guiding side hole 14 are opened. The first blood guiding side hole 13 communicates with the first blood guiding cavity 7, and the second blood guiding side hole 14 communicates with the second blood guiding chamber 8 .

Further, a first blood guiding beveled surface 15 is formed on the outer wall of the first blood guiding hole 10, a second blood guiding beveled surface 16 is formed on the outer tube wall of the second blood guiding hole 11, and the first blood guiding beveled surface 15 is opposite to the direction of inclination of the second blood guiding beveled cut surface 16 .

In a specific embodiment, the first blood guiding side hole 13 and the second blood guiding side hole 14 are both parallelogram holes that run obliquely on the tube wall, and the first blood guiding side hole 13 and the second blood guiding side hole The short side of 14 is set at a position about 0.1cm-0.2cm away from the internal partition plate 6, specifically preferably at a position of 0.15cm; the length of the short side is about 0.5cm, preferably 0.5cm, and the first blood guiding side hole 13 The long side of the second blood guiding side hole 14 is parallel to the first blood guiding chamfered surface 15, the length of the first blood guiding side hole 13 and the second blood guiding side hole 14 The side length is 0.7cm-1.0cm, preferably 0.86cm; the first blood guiding side hole 13 and the second blood guiding side hole 14 are about 2.5cm away from the tip. The first blood guide side hole 13 and the second blood guide side hole 14 adopt this structure, the area of the hole is relatively large, the shape of the hole and the length from the tip are reasonable, which can reduce pipeline blockage, sticking to the wall and reduce recirculation Proportion. In addition, by setting the first blood guiding side hole 13 and the second blood guiding side hole 14, the first blood guiding cavity 7 and the second blood guiding cavity 8 can be self-flushed respectively, effectively avoiding thrombus formation and preventing pipeline blockage.

Further, the section shape of the partition plate 6 is "Y" shape, the first blood guide cavity 7 and the second blood guide cavity 8 have the same size, and the two are mirror-symmetrical with respect to the partition plate 6, the first blood guide cavity 7 The sectional area of the first blood guiding cavity 8 is equal to the sectional area of the second blood guiding cavity 8, and the sectional area of the first blood guiding cavity 7 and the sectional area of the second blood guiding cavity 8 are larger than the sectional area of the delivery guiding cavity 9, and the sectional area of the delivery guiding cavity 9 The cross-sectional shape is fan-shaped.

The length of the main catheter 1 is designed into three specifications of 13.5cm, 16.0cm and 19.5cm, which can be respectively used for catheterization in the internal jugular vein, subclavian vein and femoral vein. The outer diameter of the main conduit 1 is 13.5Fr (4.5mm), and the thickness of the conduit wall is 0.5mm-1.0mm. It should be noted that the thinner the conduit wall, the better, while ensuring the rigidity and shaping requirements of the conduit. The delivery guide cavity 9 is a fan-shaped cavity, and the conventional stainless steel guide wire (the outer diameter of the guide wire is 0.889mm) can pass through the delivery guide cavity 9. This design can minimize the bleeding when the guide wire is inserted into the catheter. The delivery guide lumen 9 can reduce the risk of thrombus formation and catheter blockage in the catheter at a slow infusion flow rate. The first blood guiding cavity 7 and the second blood guiding cavity 8 are mirror-symmetrical with respect to the partition plate 6, and the internal space of the main catheter 1 is used to the greatest extent, which can ensure a high blood flow rate required for blood purification.

Further, the fixed sleeve 2 includes a conical section and three connectors, the smaller end of the conical section is connected to the main conduit 1, the larger end of the conical section is fixedly connected to the three connectors, and the three connectors are respectively connected to the first blood The purification connection pipe 3, the second blood purification connection pipe 4 and the delivery connection pipe 5 are connected, and three connection channels are formed in the fixed sleeve 2, and the three connection channels are respectively the first connection channel, the second connection channel and the third connection channel. The first blood purification connecting tube 3 communicates with the second blood guiding cavity 8 through the first connecting channel, the second blood purification connecting tube 4 communicates with the first blood guiding cavity 7 through the second connecting channel, and the delivery connecting tube 5 communicates with the second blood guiding cavity 7 through the third connecting channel. The channel communicates with the delivery guide cavity 9 .

A fixed buckle 22 is rotatably installed on the conical section of the fixed sleeve 2 . The first blood purification connecting tube 3 is provided with a first stop card 17 , the second blood purification connecting tube 4 is provided with a second stop card 18 , and the delivery connecting tube 5 is provided with a third stop card 19 . The connection tube can be blocked by setting the first flow stop card 17 , the second flow stop card 18 and the third flow stop card 19 to prevent blood from flowing out.

Further, it also includes two plugging cores 20, the tail end of the plugging cores 20 is formed with a take-out end 21, and the surface of the take-out end 21 is formed with threads. The plugging core 20 is soft and bendable. One of the blocking cores 20 is plugged and connected with the first blood purification connecting tube 3, the first connecting channel and the second blood guiding cavity 8, and its end can block the first blood guiding hole 10, and the other blocking core 20 is connected with The second blood purification connecting tube 4 , the second connecting channel and the first blood guiding chamber 7 are plugged and connected, and its end can block the second blood guiding hole 11 . After the two plugging cores 20 are respectively plugged in place, the tip of the main conduit 1 is smoothed and approximately conical to avoid puncture damage.

Using method of the present invention: when puncturing the catheter, adopt Seldinger technology, send the tip of the main catheter 1 into the blood vessel through the delivery guide lumen 9 along the guide wire, and at the same time, one of the blocking cores 20 is placed in the first blood guide lumen 8 And inside the first blood purification connecting tube 3, another blocking core 20 is placed inside the first blood guiding chamber 7 and the second blood purification connecting tube 4 to ensure that the tip of the overall catheter is smooth and approximately conical during puncture to avoid puncture damage. When the main catheter 1 is completely inserted into the blood vessel, pull out the two blocking cores 20 in sequence, and use a syringe to suck the blood to ensure that the pipeline is unobstructed and pass through the first stop card 17, the second stop card 18 and the third stop card. Card 19 to seal the tube. The design is safe and easy to operate, and is well compatible with existing technologies. It does not need to be operated in the operating room, which can avoid damage to the patient and the catheter during catheterization, and reduce the risk of bleeding, infection and air embolism during catheterization.

When the present invention is used for blood purification treatment, the design of the first blood guide hole 10 and the second blood guide hole 11 at the tip of the main catheter 1 can reduce the blood recirculation ratio. In addition, the first blood guide side hole 13 and the second blood guide side hole 14 are set under the tip, which can perform self-flush on the first blood guide chamber 7 and the second blood guide chamber 8 respectively, effectively avoiding thrombus formation and preventing pipeline blockage .

When using the present invention to carry out intravenous infusion or drug treatment, use the delivery guide cavity 9 to carry out. At the same time, since the delivery guide hole 12 at the tip of the delivery guide lumen 9 is far away from the first blood guide hole 10 and the second blood guide hole 11, the delivery guide lumen 9 can also be used for intravenous delivery during blood purification treatment. The three-chamber design can simultaneously have the functions of central venous access and blood purification.

The structure, features and effects of the present invention have been described in detail above based on the embodiments shown in the drawings. The above descriptions are only preferred embodiments of the present invention, but the present invention does not limit the scope of implementation as shown in the drawings. Changes made to the idea of the present invention, or modifications to equivalent embodiments that are equivalent changes, and still within the spirit covered by the description and illustrations, shall be within the protection scope of the present invention.

Claims (9)

1. A three-chamber central venous blood purification catheter device, comprising a main catheter (1), is characterized in that: it also includes a fixed cover (2), a first blood purification connecting pipe (3), a second blood purification connecting pipe (4 ) and delivery connecting pipe (5), the main conduit (1) is provided with a partition plate (6), and the partition plate (6) divides the lumen of the main conduit (1) into the first blood A guide cavity (7), a second blood guide cavity (8) and a delivery guide cavity (9), one end of the main catheter (1) is connected to the fixed sleeve (2), and the fixed sleeve (2) is also The first blood purification connection tube (3), the second blood purification connection tube (4) and the delivery connection tube (5) are connected, and the delivery connection tube (5) passes through the fixing sleeve (2 ) communicates with the delivery guide chamber (9), the first blood purification connecting tube (3) communicates with the second blood guide chamber (8) through the fixing sleeve (2), and the second blood purification The connecting pipe (4) communicates with the first blood guiding chamber (7) through the fixing sleeve (2). 2. The three-chamber central venous blood purification catheter device according to claim 1, characterized in that: the end of the main catheter (1) away from the fixed sleeve (2) is a tip, and the end of the tip is formed with The first blood guide hole (10), the second blood guide hole (11) and the delivery guide hole (12), the first blood guide hole (10) communicates with the second blood guide cavity (8), the The second blood guide hole (11) communicates with the first blood guide cavity (7), and the transport guide hole (12) communicates with the transport guide cavity (9). 3. The three-chamber central venous blood purification catheter device according to claim 2, characterized in that: a first blood guiding side hole (13) and a second side wall are provided on the side wall near the tip on the main catheter (1). A blood guiding side hole (14), the first blood guiding side hole (13) communicates with the first blood guiding cavity (7), the second blood guiding side hole (14) communicates with the second blood guiding cavity Cavity (8) runs through. 4. The three-lumen central venous blood purification catheter device according to claim 2, characterized in that: the first blood guiding lumen (7) and the second blood guiding lumen (8) have the same size, and the two are opposite to each other The partition plate (6) is mirror-symmetrical, the sectional area of the first blood guiding cavity (7) is equal to the sectional area of the second blood guiding cavity (8), and is larger than the delivery guiding cavity ( 9) The cross-sectional area. 5. The three-lumen central venous blood purification catheter device according to claim 4, characterized in that: a first blood guiding oblique section (15) is formed on the outer tube wall of the first blood guiding hole (10), so that A second blood guiding beveled surface (16) is formed on the outer tube wall of the second blood guiding hole (11), the first blood guiding beveled surface (15) and the second blood guiding beveled surface (16) The direction of inclination is opposite. 6. The three-chamber central venous blood purification catheter device according to claim 5, characterized in that: the fixed sleeve (2) comprises a conical section and three connectors, one end of the conical section is connected to the main catheter (1) connection, the other end of the conical section is fixedly connected with the three connectors, and the three connectors are respectively connected with the first blood purification connecting tube (3) and the second blood purification connecting tube (4) is connected with the delivery connection pipe (5), and three connection passages are formed in the fixed sleeve (2). 7. The three-lumen central venous blood purification catheter device according to claim 6, characterized in that: a fixed buckle (22) is rotatably installed on the conical section of the fixed sleeve (2). 8. The three-chamber central venous blood purification catheter device according to claim 7, characterized in that: the first blood purification connecting pipe (3) is provided with a first stop card (17), and the second blood A second flow-stop card (18) is provided on the purification connection pipe (4), and a third flow-stop card (19) is provided on the delivery connection pipe (5). 9. The three-chamber central venous blood purification catheter device according to any one of claims 1-8, characterized in that: it also comprises two plugging cores (20), and the tail ends of the plugging cores (20) form There is a take-out head (21), and threads are formed on the surface of the take-out head (21).

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