A Y-shaped dialysis indwelling needle

Abstract

The invention discloses a Y-shaped indwelling needle for dialysis, which comprises a catheter assembly and a needle handle assembly. The catheter assembly is composed of a catheter, a needle core, and a catheter seat. The needle handle assembly is composed of a needle tube and a needle handle. The needle core is connected to the rear end of the catheter, the catheter is located inside the catheter seat, the needle core passes through the catheter seat, the needle handle assembly is inserted from the rear end of the catheter assembly, the needle tube in the needle handle assembly passes through the indwelling needle catheter, the needle handle is connected to the needle tube, and the hose is connected to the side of the catheter seat. The advantages of the invention are: the needle tube can be withdrawn after the indwelling needle for dialysis is punctured, the cap is screwed into the rear end of the catheter seat, and a double-layer sealing structure is formed with the rubber stop valve to prevent bleeding. The product is safe and reliable, and a tubular object made of a polymer material is left in the blood vessel. It will not damage the blood vessel, and the steel needle will not puncture the blood vessel. When the dialysis patient moves, the blood flow will not change suddenly, and the needle will not puncture the blood vessel. It is particularly suitable for patients who are agitated during emergency treatment.

Description

Technical Field

[0001] The invention relates to a Y-shaped indwelling needle for dialysis, belongs to the field of medical devices, is mainly used for blood vessel puncture, is connected with a blood circuit, and is used by patients who need to undergo hemodialysis or filtration clinically. Background Art

[0002] The use of indwelling needles in dialysis is already very common in some developed countries. For example, 70% of dialysis patients in Japan use indwelling needles. After puncture, the needle can be withdrawn, and what remains in the patient's blood vessels is a soft polymer tube. It will not cause damage to the blood vessels, and it also avoids the phenomenon of the fistula needle puncturing the blood vessels. The movement of the patient's body during dialysis will not cause sudden changes in blood flow, and there is no need to worry about the needle puncturing the blood vessels. It is especially suitable for some restless patients in emergency treatment.

[0003] Dialysis indwelling needles are mainly used in hemodialysis rooms. At present, most hemodialysis rooms in my country use fistula needle puncture, and dialysis indwelling needles are rarely used.

[0004] 1. Compared with fistula needle puncture, the indwelling needle hose material is soft and has less stimulation to the patient's blood vessel wall, which can reduce the damage to the inner wall of the blood vessel, reduce the incidence of hematoma / bleeding, and protect the fistula blood vessels. The catheter material has better biocompatibility than the steel needle, and the patient's allergy incidence is lower.

[0005] 2. The use of indwelling needles improves the patient's comfort. When the patient moves, the tip of the steel needle may irritate the blood vessels and cause pain to the patient, while patients with indwelling needles can move relatively freely.

[0006] The dialysis catheters currently used in a few hospitals in China are imported from Japan. These catheters have the advantages of precise design and good puncture performance, but they also have the following disadvantages: they are not firmly fixed, and when the patient's arm moves slightly, the dialysis needle is easy to fall out, causing blood loss and interruption of dialysis; the silicone hose part is too short, and it is not convenient to clamp this part with a vascular clamp before drawing blood on the machine. Moreover, the vascular clamp is a metal object with a certain weight, which can easily pull the dialysis catheter, causing the needle to shift or even fall out. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a Y-shaped dialysis indwelling needle which is firmly fixed, the dialysis needle patch is easy to be removed, the use is convenient, and the needle is not easy to be displaced.

[0008] The present invention is achieved through the following scheme: a Y-shaped indwelling needle for dialysis, which includes a catheter assembly and a needle handle assembly, the catheter assembly is composed of a catheter, a needle core, and a catheter seat, the needle handle assembly is composed of a needle tube and a needle handle, the needle core is connected to the rear end of the catheter, the catheter is located inside the catheter seat, the needle core passes through the catheter seat, the needle handle assembly is inserted from the rear end of the catheter assembly, the needle tube in the needle handle assembly passes through the indwelling needle catheter, the needle handle is connected to the needle tube, and the hose is connected to the side of the catheter seat.

[0009] A pipe clamp is sleeved on the outside of the hose, a conical joint is connected to the rear end of the hose, and a conical joint protection sleeve is connected to the conical joint.

[0010] A rubber stop valve is arranged in the catheter seat, and the rubber stop valve is located at the rear end of the needle core. The needle tube passes through the rubber stop valve, the needle core and the catheter in sequence.

[0011] The rear end of the needle handle is connected to a cover cap.

[0012] A sheath is mounted on the catheter seat, and the catheter and the needle tube are located inside the sheath.

[0013] After the dialysis indwelling needle is punctured, the needle tube can be withdrawn, and the cover cap is screwed into the rear end of the catheter seat to form a double-layer sealing structure with the rubber stop valve.

[0014] The front end of the catheter is provided with a blood inlet hole, and four side holes are provided around it.

[0015] The hose has a double-layer structure, with an inner layer being a TPU layer and an outer layer being a PVC layer.

[0016] The catheter seat is a three-way Y-shaped structure.

[0017] The length of the hose is 150mm-300mm.

[0018] The beneficial effects of the present invention are:

[0019] 1. The FEP catheter of the Y-type dialysis indwelling needle of the present invention is connected to the needle core and then interference-fitted with the catheter seat, which has a simple structure, reliable connection, simple manufacturing process and low production cost;

[0020] 2. The catheter of the Y-shaped dialysis indwelling needle of the present invention is made of fluororesin plastic. The steel needle can be withdrawn after puncture, and what remains in the patient's blood vessel is a soft tubular object made of polymer material. The front end has one blood inlet hole and four side holes. The blood sampling function is strong, the blood flow rate is stable, the flow rate is sufficient and the error is small. The movement of the patient's body during dialysis will not cause a sudden change in blood flow;

[0021] 3. The material of the needle hose of the Y-type dialysis indwelling needle of the present invention adopts double-layer supply technology (inner layer TPU, outer layer PVC), which avoids the contact between blood and PVC material, and has a simple manufacturing process and low production cost, thereby reducing the production cost of the product;

[0022] 4. The needle catheter seat of the Y-shaped hemodialysis indwelling needle of the present invention is a three-way Y-shaped structure, which increases the fixable area, is more firmly fixed by adhesive tape, and the product is not easy to fall out, thus overcoming the disadvantage that the existing hemodialysis indwelling needle is easy to fall off;

[0023] 5. The outer side of the soft tube of the Y-type dialysis indwelling needle of the present invention is covered with a tube clamp, which eliminates the inconvenience and potential danger caused by the use of vascular clamps, and the product is more convenient and safer;

[0024] 6. The puncture point created by the Y-shaped dialysis indwelling needle of the present invention is 2 sizes smaller than that of a metal arteriovenous fistula needle. For example, for a 16G catheter, the inner steel needle only needs 18G, which can reduce damage to the blood vessel wall and prolong the life of the blood vessel;

[0025] 7. Compared with the fistula needle technology, the Y-shaped dialysis indwelling needle of the present invention does not cause secondary or multiple puncture injuries during the dialysis process;

[0026] 8. The Y-type dialysis indwelling needle of the present invention adopts a double-layer sealing structure, a front rubber stop valve, and a 6:100 cap structure at the rear to prevent bleeding, and the product is safe and reliable;

[0027] 9. The length of the hose of the Y-type hemodialysis indwelling needle of the present invention is 150mm-300mm, which is 100mm longer than the hose length of the existing hemodialysis indwelling needle, ensuring sufficient length for connection with the blood circuit;

[0028] 10. The outer side of the soft tube of the Y-type dialysis indwelling needle of the present invention is covered with a tube clamp, which eliminates the inconvenience and potential danger caused by the use of vascular clamps, and the product is more convenient and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The figure is a front view structural schematic diagram of a Y-shaped dialysis indwelling needle according to the present invention.

[0030] Figure 2 The figure is a schematic diagram of the front cross-sectional structure of a Y-shaped dialysis indwelling needle of the present invention.

[0031] Figure 3 The figure is a schematic diagram of the assembly of a Y-shaped dialysis indwelling needle according to the present invention.

[0032] Figure 4 The figure is a schematic diagram of the opening of the FEP catheter of a Y-shaped dialysis indwelling needle of the present invention.

[0033] Figure 5 The figure is a schematic diagram of the double-layer structure of a soft tube of a Y-shaped dialysis indwelling needle according to the present invention.

[0034] Figure 6 The figure is a schematic diagram of a double-layer sealing structure of a Y-shaped dialysis indwelling needle according to the present invention.

[0035] In the figure: 1 is a sheath, 2 is a catheter seat, 3 is a catheter, 4 is a needle core, 5 is a rubber stop valve, 6 is a needle tube, 7 is a needle handle, 8 is a cap, 9 is a hose, 10 is a tube clamp, 11 is a conical joint, and 12 is a conical joint protective cover. DETAILED DESCRIPTION

[0036] Combine the following Figure 1-6 The present invention is further described, but the protection scope of the present invention is not limited to the described contents.

[0037] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. The drawings are all in very simplified form and use inaccurate ratios, which are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0038] For the sake of clarity, not all features of an actual embodiment are described. In the following description, well-known functions and structures are not described in detail because they would obscure the invention with unnecessary detail. It should be recognized that in the development of any actual embodiment, a large number of implementation details must be made to achieve the specific goals of the developer, such as changing from one embodiment to another according to relevant system or relevant business limitations. In addition, it should be recognized that such development work may be complex and time-consuming, but it is merely routine work for those skilled in the art.

[0039] A Y-shaped indwelling needle for dialysis comprises a catheter assembly and a needle handle assembly, wherein the catheter assembly is composed of a catheter 3, a needle core 4, and a catheter seat 2, and the needle handle assembly is composed of a needle tube 6 and a needle handle 7. The needle core 4 is connected to the rear end of the catheter 3, the catheter 3 is located inside the catheter seat 2, the needle core 4 passes through the catheter seat 2, the needle handle assembly is inserted from the rear end of the catheter assembly, the needle tube 6 in the needle handle assembly passes through the indwelling needle catheter 3, the needle handle 7 is connected to the needle tube 6, and the hose 9 is connected to the side of the catheter seat 2.

[0040] A pipe clamp 10 is sleeved on the outside of the hose 9 , a conical joint 11 is connected to the rear end of the hose 9 , and a conical joint protection sleeve 12 is connected to the conical joint 11 .

[0041] A rubber stop valve 5 is provided in the catheter seat 2 , and the rubber stop valve 5 is located at the rear end of the needle core 4 . The needle tube 6 passes through the rubber stop valve 5 , the needle core 4 and the catheter 3 in sequence.

[0042] The rear end of the needle handle 7 is connected to the cover cap 8 .

[0043] A sheath 1 is mounted on the catheter seat 2 , and the catheter 3 and the needle tube 6 are located inside the sheath 1 .

[0044] After the dialysis indwelling needle is punctured, the needle tube 6 can be withdrawn, and the cover cap 8 is screwed into the rear end of the catheter seat 2 to form a double-layer sealing structure with the rubber stop valve 5.

[0045] The front end of the catheter 3 is provided with a blood inlet hole and four side holes are provided around it.

[0046] The hose 9 is a double-layer structure, with an inner layer being a TPU layer and an outer layer being a PVC layer.

[0047] The catheter seat 2 is a three-way Y-shaped structure.

[0048] The length of the hose 9 is 150 mm to 300 mm.

[0049] A Y-shaped dialysis indwelling needle, the working process is as follows:

[0050] The first step is to open the package and take out the product;

[0051] The second step is to pull back the needle handle 7 until it contacts the catheter seat 2, making sure that the needle tip is not covered by the tip of the catheter 3;

[0052] The third step is to hold the needle handle 7 tightly, with the blade of the needle facing upward, and puncture the blood vessel. When blood reflux is seen, the catheter 3 is further inserted into the blood vessel by about 1 cm. Hold the catheter seat 2 tightly with one hand and the needle handle 7 tightly with the other hand, so as to remove the needle tube 6 from the catheter 3.

[0053] Step 4: Remove the conical connector protective cover 12 and connect the blood circuit to the conical connector 11;

[0054] Step 5: Use adhesive tape or equivalent to fix the catheter 3 and the blood circuit tube so that the blood circuit tube is annular and fixed.

Claims

1. A Y-shaped dialysis indwelling needle, characterized in that: It comprises a catheter assembly and a needle handle assembly, wherein the catheter assembly is composed of a catheter (3), a needle core (4), and a catheter seat (2); the needle handle assembly is composed of a needle tube (6) and a needle handle (7); the needle core (4) is connected to the rear end of the catheter (3); the catheter (3) is located inside the catheter seat (2); the needle core (4) passes through the catheter seat (2); the needle handle assembly is inserted from the rear end of the catheter assembly; the needle tube (6) in the needle handle assembly passes through the indwelling needle catheter (3); the needle handle (7) is connected to the needle tube (6); and a hose (9) is connected to the side of the catheter seat (2); The outer side of the hose (9) is covered with a hose clamp (10), the rear end of the hose (9) is connected to a conical joint (11), and a conical joint protection sleeve (12) is connected to the conical joint (11); A rubber stop valve (5) is provided in the catheter seat (2), the rubber stop valve (5) is located at the rear end of the needle core (4), and the needle tube (6) passes through the rubber stop valve (5), the needle core (4) and the catheter (3) in sequence; The catheter (3) has a blood inlet opening at the front end and four side holes around it; The hose (9) is a double-layer structure, the inner layer is a TPU layer, and the outer layer is a PVC layer; The length of the hose (9) is 150 mm to 300 mm.

2. A Y-shaped dialysis indwelling needle according to claim 1, characterized in that: The rear end of the needle handle (7) is connected to a cover cap (8).

3. A Y-shaped dialysis indwelling needle according to claim 1, characterized in that: A sheath (1) is mounted on the catheter seat (2), and the catheter (3) and the needle tube (6) are located inside the sheath (1).

4. A Y-shaped dialysis indwelling needle according to claim 1, characterized in that: After the dialysis indwelling needle is punctured, the needle tube (6) can be withdrawn, and the cover cap (8) is screwed into the rear end of the catheter seat (2) to form a double-layer sealing structure with the rubber stop valve (5).

5. A Y-shaped dialysis indwelling needle according to claim 1, characterized in that: The catheter seat (2) is a three-way Y-shaped structure.

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