CN204972635U - Prevent hemodialysis pipe of adherence - Google Patents

Abstract

The utility model discloses an anti-adhesion hemodialysis catheter in the technical field of medical equipment, which comprises two pipe joints, a catheter body and a fixed wing. The lumen, the blood transfusion catheter lumen and the blood drawing catheter lumen are separated by a partition, and the blood transfusion catheter lumen and the blood drawing catheter lumen are connected to a pipe joint correspondingly. The front of the lumen port and the lumen port of the blood drawing catheter; the lumen port of the blood transfusion catheter and the lumen port of the blood drawing catheter are all composed of beveled and straight cut edges, and the beveled and straight cut edges form a continuous edge, and the straight cut The side is perpendicular to the partition, the chamfered side is longer than the straight side, and the chamfered side of the lumen port of the blood transfusion catheter is opposite to the direction of inclination of the chamfered side of the lumen port of the blood drawing catheter. Through the structural improvement, the situation that fresh blood is sucked away by the lumen of the blood pumping catheter can be well prevented.

Description

A kind of anti-adherence hemodialysis catheter

technical field

The utility model relates to the technical field of medical instruments, in particular to a hemodialysis catheter.

Background technique

The hemodialysis catheter is generally used during hemodialysis at present, and the head of the original hemodialysis catheter is provided with a bleeding port and a blood-sucking port, and the bleeding port and the blood-sucking port are close together. Clinically, it is necessary to ensure the smooth blood extraction of the hemodialysis catheter, and ensure the smooth flow of the bleeding port and the blood suction port of the catheter. However, in the clinical treatment process, the blood-sucking port will absorb a large amount of dirty blood, and the blood-sucking port will easily suck the blood vessel wall and make the blood vessel wall cling to the blood-sucking port, resulting in a wall-attachment phenomenon, which will cause the blood-sucking port to be blocked, so that the blood cannot flow again. Through the blood suction port, the dialysis circuit cannot be kept open normally.

In order to solve the above problems, the prior art discloses a hemodialysis catheter that is anti-sticking to the blood vessel wall, the application number is 201120041217.9, and the application date is 2011.02.18. The end section of the dialysis catheter is provided with a concave and smooth transition section, and a circular protrusion is provided on the transition section , the protruding side of the circular ring is provided with side holes, and the side holes are staggeredly distributed on the blood pumping cavity.

However, there is still a big defect in the prior art: the outlet of the blood pumping chamber and the blood transfusion chamber are too close, causing part of the fresh blood input into the blood vessel to be sucked away by the blood pumping chamber together with the dirty blood.

Utility model content

The purpose of the utility model is to provide an anti-adhesion hemodialysis catheter, which can well prevent fresh blood from being sucked away by the lumen of the blood-drawing catheter through structural improvement.

The purpose of this utility model is achieved in this way: a hemodialysis catheter for anti-adherence, including two pipe joints, two drainage tubes matched with the pipe joints, and a catheter body integrated with the two pipe joints through the drainage tubes , the fixed wing set on the input end of the catheter body, the catheter body can be divided into a blood transfusion catheter lumen and a blood draw catheter lumen separated from each other, and the blood transfusion catheter lumen and the blood draw catheter lumen are separated by a partition , the lumen of the blood transfusion catheter and the lumen of the blood drawing catheter are correspondingly connected to a pipe joint, and the front end of the partition extends forward and is in front of the port of the lumen of the blood transfusion catheter and the port of the blood drawing catheter; Both the lumen port of the blood transfusion catheter and the lumen port of the blood drawing catheter are composed of beveled edges and straight edges, which form continuous edges, the straight edges are perpendicular to the partition, and the beveled The cut side is longer than the straight cut side, and the oblique direction of the chamfered side of the lumen port of the blood transfusion catheter is opposite to that of the chamfered side of the lumen port of the blood drawing catheter.

Compared with the prior art, the utility model has the beneficial effects as follows: firstly, the front end of the partition can completely isolate the lumen port of the blood transfusion catheter and the lumen port of the blood drawing catheter, which can prevent fresh blood from flowing back into the blood drawing catheter Second, the beveled edge of the lumen port of the blood transfusion catheter is in the opposite direction to the beveled edge of the lumen port of the blood drawing catheter, so that the blood drawing path and the blood transfusion path are staggered from each other and are oblique, greatly The degree of mixing of fresh blood and dirty blood is reduced, and the situation that fresh blood is sucked away by the lumen of the blood pumping catheter is well prevented.

As a preferred solution of the present invention, an opening is provided on the cavity wall of the implanted blood vessel on the lumen of the blood drawing catheter, the opening is close to the tube head, and the opening is inclined. It is to further increase the amount of blood pumped, and the opening is inclined, which can increase the area of the opening so that more dirty blood can be drawn per unit time.

As a further preferred solution of the present invention, two wing plates are symmetrically fixed on the outer side wall of the fixed wing, and a hoop capable of clamping the drainage tube is inserted on the wing plate. It is to prevent the drainage tube from sloshing during use, so as to ensure the smoothness of the blood transfusion and blood drawing process.

As a further preferred solution of the present invention, the top of the partition is provided with rounded corners. It is to prevent the catheter body from scratching the vessel wall when it is inserted into the vessel.

As a further preferred solution of the present utility model, the clamp is provided with a recess capable of holding the drainage tube, and the shape of the recess is adapted to the section of the drainage tube. It is to better clamp the drainage tube to the clamp, further enhancing the stability.

Description of drawings

Fig. 1 is a three-dimensional schematic view of the pipe head of the present invention.

Fig. 2 is a schematic diagram of the end face of the pipe head of the utility model.

Fig. 3 is a view from the E direction in Fig. 2 .

FIG. 4 is a view from the F direction in FIG. 2 .

Fig. 5 is a schematic diagram of the overall layout of the utility model.

Fig. 6 is a cross-sectional view of A-A in Fig. 5 .

Among them, 1 tube connector, 2 catheter body, 21 tube head, 22 rounded corners, 23 blood transfusion catheter lumen, 24 blood pumping catheter lumen, 25 partition, 26 chamfered edge, 27 straight trimmed edge, 28 opening, 3 Fixed wing, 3a wing plate, 4 clips, 4a recess, 5 drainage tube.

detailed description

As shown in Figure 1-5, an anti-adherence hemodialysis catheter includes two pipe joints 1, two drainage tubes 5 matching with the pipe joints 1, and the two pipe joints 1 are integrated through the drainage tube 5 Catheter main body 2, fixed wing 3 set on the input end of catheter main body 2, catheter main body 2 can be divided into blood transfusion catheter lumen 23, blood drawing catheter lumen 24 separated from each other, blood transfusion catheter lumen 23, blood drawing catheter lumen 24 are separated by a partition 25, the blood transfusion catheter lumen 23 and the blood drawing catheter lumen 24 are correspondingly connected to a pipe joint 1, the front end of the partition 25 extends forward and is located at the port of the blood transfusion catheter lumen 23, and the blood drawing catheter lumen 24 is connected to a pipe joint 1. The front of the catheter lumen 24 ports; the blood transfusion catheter lumen 23 ports and the blood pumping catheter lumen 24 ports are all formed by a beveled edge 26 and a straight edge 27, and the beveled edge 26 and the straight edge 27 form a continuous edge. The cut edge 27 is perpendicular to the partition 25, the beveled edge 26 is longer than the straight cut edge 27, and the beveled edge 26 of the port of the blood transfusion catheter lumen 23 is opposite to the inclination direction of the beveled edge 26 of the port of the blood drawing catheter lumen 24.

The front end of the above-mentioned partition 25 can completely isolate the port of the blood transfusion catheter lumen 23 and the port of the blood drawing catheter lumen 24, which can prevent fresh blood from flowing back into the blood drawing catheter lumen 24; the beveled edge of the blood transfusion catheter lumen 23 port 26 is opposite to the inclination direction of the chamfered side 26 of the port of the blood drawing catheter lumen 24, which can make the blood drawing path and the blood transfusion path staggered from each other and are both oblique, which greatly reduces the degree of mixing of fresh blood and dirty blood. The situation that the fresh blood is sucked away by the blood pumping catheter lumen 24 is well prevented.

As shown in FIG. 4 , an opening 28 is provided on the cavity wall of the implanted blood vessel on the lumen 24 of the blood pumping catheter. The opening 28 is close to the tube head 21 , and the opening 28 is inclined. The blood pumping volume of the blood pumping catheter lumen 24 is further increased, and the opening 28 is inclined, which can increase the area of the opening 28 so as to draw more dirty blood per unit time.

As shown in Figures 5 and 6, two wing plates 3a are symmetrically fixed on the outer wall of the above-mentioned fixed wing 3, and a clamp 4 that can be clamped to the drainage tube 5 is inserted on the wing plate 3a to prevent the drainage tube 5 from being used. The phenomenon of sloshing occurs when the machine is used, so as to ensure the smoothness of the blood transfusion and blood drawing process.

As shown in FIG. 1 , rounded corners 22 are provided at the top of the partition 25 to prevent the catheter body 2 from scratching the vessel wall when inserted into the vessel.

As shown in FIG. 6 , the clamp 4 is provided with a concave portion 4 a that can hold the drainage tube 5 , and the shape of the concave portion 4 a is adapted to the section of the drainage tube 5 . The drainage tube 5 is better clamped on the clamp 4, which further enhances the stability.

The utility model is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the utility model, those skilled in the art can make some technical features based on the disclosed technical content without creative work. Replacement and deformation, these replacements and deformations are all within the protection scope of the present utility model.

Claims (5)

1. An anti-adherence hemodialysis catheter, comprising two pipe joints (1), two drainage tubes (5) matched with the pipe joints (1), through the drainage tube (5) and two pipe joints (1) ) into one catheter body (2), the fixed wing (3) set on the input end of the catheter body (2), the catheter body (2) can be divided into blood transfusion catheter lumens (23) separated from each other, blood drawing Catheter lumen (24), the blood transfusion catheter lumen (23) and the blood drawing catheter lumen (24) are separated by a partition (25), the blood transfusion catheter lumen (23), the blood drawing catheter lumen (24) are correspondingly connected to a pipe joint (1), characterized in that: the front end of the partition (25) extends forward and is located at the port of the blood transfusion catheter lumen (23) and the blood pumping catheter lumen (24) The front of the port; the port of the blood transfusion catheter lumen (23) and the port of the blood drawing catheter lumen (24) are composed of a beveled edge (26) and a straight edge (27). The beveled edge (26), The straight cutting edge (27) forms a continuous edge, the straight cutting edge (27) is perpendicular to the partition (25), the beveled cutting edge (26) is longer than the straight cutting edge (27), and the blood transfusion catheter lumen (23 ) port's beveled edge (26) is opposite to that of the blood pumping catheter lumen (24) port's beveled edge (26). 2. An anti-adherence hemodialysis catheter according to claim 1, characterized in that: the lumen (24) of the blood pumping catheter is provided with an opening (28) on the lumen wall of the blood vessel implanted, and the The opening (28) is close to the pipe head (21), and the opening (28) is inclined. 3. An anti-adherence hemodialysis catheter according to claim 1, characterized in that two wing plates (3a) are symmetrically fixed on the outer wall of the fixed wing (3), and the wing plates ( 3a) A clamp (4) that can hold the drainage tube (5) is inserted on it. 4. The anti-adherence hemodialysis catheter according to claim 1, characterized in that: the top of the partition (25) is provided with rounded corners (22). 5. The anti-adherence hemodialysis catheter according to claim 3, characterized in that: the clamp (4) is provided with a recess (4a) that can hold the drainage tube (5), and the recess ( The shape of 4a) is adapted to the section of the drainage tube (5).