A hemodialysis catheter blood collection device

Abstract

This utility model discloses a blood collection device for a hemodialysis catheter, including a main body with a connector connected to it. A three-way connector is connected to the end of the main body passing through the connector. A fixed catheter and a connecting tube are connected to the three-way connector. A clamp and a block are circumferentially arranged around the port cross-section of the connecting tube end. An inwardly recessed annular groove is provided inside the port of the connecting tube. This hemodialysis catheter blood collection device, by setting a fixed catheter head on one side of the three-way connector for its conventional function, and adding a connecting tube at the front end of the tubing on the other side, allows for blood collection without frequent disconnection of the connection point. Furthermore, the rubber soft ring at the end of the collection tube, in conjunction with the clamp, block, and interlocking block, achieves a good airtight seal, preventing the collection tube from loosening.

Description

Technical Field

[0001] This utility model relates to the field of dialysis catheter equipment technology, specifically a blood collection device for hemodialysis catheters. Background Technology

[0002] Dialysis catheters are primarily used today for exchanging blood between patients and hemodialysis machines, and for chronic diseases involving the exchange of blood between patients and hemodialysis machines. During an exemplary hemodialysis procedure, a multi-lumen catheter is inserted into the body, and blood is drawn through the arterial lumen of the catheter. This blood is then supplied to the hemodialysis machine, which dialyzes or cleans the blood to remove waste and excess water. The dialyzed blood is returned to the patient through the venous lumen of the catheter. In clinical practice, when performing bedside CRRT or hemodialysis, patients with long-term or temporary hemodialysis catheters often require blood draws (for testing). Currently, there are three methods of blood draw: one is drawing blood from peripheral vessels, which has high accuracy but increases patient discomfort; the second is drawing blood from the machine tubing, but this is prone to dilution, leading to inaccurate test results; and the third is drawing blood from the catheter opening. Using a regular syringe requires drawing 20 ml of blood first, then drawing more blood, and then re-injecting the 20 ml into the catheter, but this requires multiple disconnections at the connection point and carries the risk of blood clots from the 20 ml of blood.

[0003] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a blood collection device for hemodialysis catheters, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a blood collection device for a hemodialysis catheter, comprising a main body, a connector connected to the main body, a three-way connector connected to the end of the main body passing through the connector, a fixed catheter and a connecting tube connected to the three-way connector, a clip and a block circumferentially arranged around the port cross-section of the end of the connecting tube, and an inwardly recessed annular groove provided inside the port of the connecting tube.

[0008] Preferably, a fixed conduit head is connected to the fixed conduit, a fixed clamp is fixedly connected to the fixed conduit, an external connector is connected to the end of the fixed conduit head, and the fixed clamp is located above the tee connector.

[0009] Preferably, the connecting tube is connected to a suction tube, and a second annular groove is formed at the bottom end of the suction tube. The size of the second annular groove is larger than that of the annular groove, and a rubber soft ring is fixedly provided in the second annular groove.

[0010] Preferably, the size of the rubber soft ring is the same as the size of the annular groove, and the height of the rubber soft ring is greater than the depth of the second annular groove.

[0011] Preferably, the outer edge of the end of the suction tube is provided with a fitting block, the height of the fitting block is lower than the height of the clip and block, the clip and block is U-shaped, the suction tube is fixedly provided with a fixing clip, and the end is provided with a pull handle.

[0012] (III) Beneficial Effects

[0013] After adopting the above technical solution, this utility model has the following advantages compared with the prior art: The blood collection device for hemodialysis catheters of this utility model has a fixed catheter head set on one side of the connection of the three-way connector to achieve the original conventional function, and a connecting tube is added to the front end of the pipeline on the other side. The blood collection device is installed through the connecting tube, so that blood collection can be completed without frequent separation of the connection. In addition, the rubber soft ring set at the end of the blood collection tube, together with the clip and the interlocking block, achieves good airtight sealing and will not cause the blood collection tube to loosen. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention;

[0015] Figure 2 This is a front view schematic diagram of the present utility model;

[0016] Figure 3 This is a schematic diagram of the three-way connector of this utility model;

[0017] Figure 4 This is a bottom view of the connecting part of the connecting pipe of this utility model.

[0018] In the diagram: 1. Main tube; 2. Connector; 3. T-connector; 4. Fixed catheter head; 5. Fixing clamp; 6. Pull handle; 7. Connecting tube; 8. Clip and block; 9. Circular groove; 10. Fitting block; 11. Rubber soft ring; 12. Aspiration tube. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1-4The following describes a blood collection device for a hemodialysis catheter: A main tube 1 is connected to a connector 2. A three-way connector 3 is connected to the end of the main tube 1 passing through the connector 2. A fixing catheter and a connecting tube 7 are connected to the three-way connector 3. A retainer and a block 8 are circumferentially arranged around the port section of the connecting tube 7. An inwardly recessed annular groove 9 is provided inside the port of the connecting tube 7. The end of a blood collection tube 12 is inserted into the connecting tube 7, and the fitting block 10 is aligned with the area on the connecting tube 7 without the retainer and block 8. Then... Forcefully insert the suction tube 12 into the connecting tube 7. At this time, the rubber soft ring 11 is inserted into the annular groove 9, ensuring good airtightness. Then rotate the suction tube 12 so that the interlocking block 10 rotates to below the card and block 8. At this time, the interlocking block 10 is inserted into the groove of the card and block 8, further realizing the fixed positioning of the suction tube 12. When blood needs to be drawn for dialysis, the blood can be drawn directly by pulling the pull handle 6 outward. Then, rotating the suction tube 12 can separate the two, eliminating the need to frequently separate the main tube 1 for blood drawing.

[0021] The fixed catheter is connected to a fixed catheter head 4, and the fixed catheter head 4 is also equipped with a clamp so that the tube will not have negative pressure when clamped, so that the blood collection tube 12 can draw blood smoothly. The fixed catheter is fixedly connected to a fixing clip 5, and the end of the fixed catheter head 4 is connected to an external connector. The fixing clip 5 is located above the three-way connector 3. The fixing clip 5 can better fix the main tube body 1 and prevent it from shaking or moving around.

[0022] A suction tube 12 is connected to the connecting tube 7. A second annular groove is formed at the bottom of the suction tube 12, and this second annular groove is larger than the annular groove 9. A rubber ring 11 is fixed inside the second annular groove. The rubber ring 11 has a certain degree of elasticity. The size of the rubber ring 11 is the same as the size of the annular groove 9, and the height of the rubber ring 11 is greater than the depth of the second annular groove. When it is inserted into the annular groove 9, under the pressure of the suction tube 12, the rubber ring 11 is compressed to completely fill the annular groove 9. This ensures the airtightness between the suction tube 12 and the connecting tube 7. Simultaneously, the friction of the rubber ring 11 improves the stability of the connection between the two.

[0023] The outer edge of the end of the blood collection tube 12 is provided with a fitting block 10. The height of the fitting block 10 is slightly lower than the height of the clip and block 8, so that it can be locked by the clip and block 8. The clip and block 8 is U-shaped and has a slightly downward curvature at the edge. When the fitting block 10 enters the slot of the clip and block 8, the downward extension of the edge of the clip and block 8 can better lock the fitting block 10 and keep its position stable. A fixing clip 5 is fixed on the body of the blood collection tube 12 to better fix and limit it and prevent it from shaking. The end is provided with a pull handle 6. The structure between the blood collection tube 12 and the pull handle 6 is the same as the conventional existing syringe structure, which is a mature existing technology. Blood is drawn by pulling the pull handle 6.

[0024] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A blood collection device for a hemodialysis catheter, comprising a main body (1), characterized in that: The main body (1) is connected to a connector (2), and the end of the main body (1) passing through the connector (2) is connected to a tee connector (3). The tee connector (3) is connected to a fixed conduit and a connecting pipe (7). The outer edge of the end of the connecting pipe (7) is provided with a clip and a block (8) around the port section. The port of the connecting pipe (7) is provided with an inwardly recessed annular groove (9).

2. The blood collection device for a hemodialysis catheter according to claim 1, characterized in that: The fixed conduit is connected to a fixed conduit head (4), and a fixed clamp (5) is fixedly connected to the fixed conduit. An external connector is connected to the end of the fixed conduit head (4), and the fixed clamp (5) is located above the tee connector (3).

3. The blood collection device for a hemodialysis catheter according to claim 1, characterized in that: A suction tube (12) is connected to the connecting tube (7). A second annular groove is provided at the bottom end of the suction tube (12). The size of the second annular groove is larger than that of the annular groove (9). A rubber soft ring (11) is fixedly provided in the second annular groove.

4. The blood collection device for a hemodialysis catheter according to claim 3, characterized in that: The size of the rubber soft ring (11) is the same as the size of the annular groove (9), and the height of the rubber soft ring (11) is greater than the depth of the second annular groove.

5. A blood collection device for a hemodialysis catheter according to claim 3, characterized in that: The outer edge of the end of the suction tube (12) is provided with a fitting block (10). The height of the fitting block (10) is lower than the height of the card and block (8). The card and block (8) is U-shaped. The suction tube (12) is fixedly provided with a fixing clip (5) and the end is provided with a pull handle (6).

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