Improved hemodialysis indwelling needle

Abstract

This utility model discloses an improved hemodialysis indwelling needle, including a three-way valve. An indwelling tubing is fixedly installed on the left side of the three-way valve. A limiting sleeve is fitted around the outer ring of the indwelling tubing. An installation groove is formed on the inner wall of the middle portion of the limiting sleeve, and a limiting ring is fixedly installed within this groove. A connecting tube is installed on one side of the three-way valve, and a connecting tubing is fixedly installed at the other end of the connecting tube. Both the outer ring of the connecting tubing and the right outer ring of the three-way valve are provided with flow-stopping sleeves. This improved hemodialysis indwelling needle, by incorporating a cannula handle, a limiting sleeve, and a limiting ring, allows medical personnel to better control the size of the needle, preventing it from completely passing through the blood vessel and affecting the patient's hemodialysis. The connecting tubing and flow-stopping sleeve also facilitate convenient medication administration to the patient via the connecting tubing.

Description

Technical Field

[0001] This utility model relates to the field of indwelling needle technology, and more specifically, to an improved hemodialysis indwelling needle. Background Technology

[0002] Indwelling needles for hemodialysis are special puncture tools designed specifically for patients with end-stage renal disease. Their core advantage lies in reducing the risk of vascular damage and complications caused by repeated punctures, while improving treatment efficiency and patient comfort. Traditional indwelling needles do not have a limiting function, and it may be difficult to control the size when puncturing the blood vessel, resulting in the needle passing completely through the blood vessel and affecting the patient's hemodialysis. Traditional indwelling needles are also inconvenient for patients to administer medication. In order to solve the above potential problems...

[0003] Therefore, this application proposes an improved hemodialysis indwelling needle. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an improved hemodialysis indwelling needle to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an improved hemodialysis indwelling needle, comprising a three-way tube, an indwelling tubing fixedly installed on the left side of the three-way tube, a limiting sleeve sleeved around the outer ring of the indwelling tubing, an installation groove formed in the middle inner wall of the limiting sleeve, and a limiting ring fixedly installed in the installation groove, a connecting tube installed on one side of the three-way tube, a connecting tubing fixedly installed at the other end of the connecting tube, and a flow-stopping sleeve provided on the outer ring of the connecting tubing and the right outer ring of the three-way tube.

[0006] As a preferred embodiment of this utility model, sleeve handles are fixedly installed on both side walls of the limiting sleeve.

[0007] As a preferred technical solution of this utility model, the limiting ring installed on the inner wall of the middle part of the limiting sleeve is made of medical rubber.

[0008] As a preferred embodiment of this utility model, a steel needle that penetrates the indwelling tubing is inserted into the right side of the three-way tube, and a steel needle seat is installed at the right end of the steel needle.

[0009] As a preferred embodiment of this utility model, a needle-holding handle is fixedly installed on one side of the steel needle holder.

[0010] As a preferred embodiment of this utility model, the right side of the three-way pipe, located at the installation of the flow stop sleeve, is a flexible hose.

[0011] Compared with the prior art, the improved hemodialysis indwelling needle provided by this utility model has the following beneficial effects:

[0012] 1. This improved hemodialysis indwelling needle, by setting a cannula handle, a limiting cannula, and a limiting ring, allows the position of the limiting cannula to be adjusted using the cannula handle, and the limiting ring to be stably fixed on the indwelling tubing. The position of the limiting cannula on the indwelling tubing can be adjusted by holding the cannula handle, which can make medical staff more precise in controlling the size and prevent the steel needle from passing completely through the blood vessel, thus affecting the patient's hemodialysis.

[0013] 2. This improved hemodialysis indwelling needle, by setting up a connecting tubing and a stopcock, allows medication to be administered when needed. The stopcock on the connecting tubing can be opened, and the medication can be injected into the three-way tube through the connecting tubing. The medication can then flow into the patient's blood vessels through the indwelling tubing, thus enabling medication administration. After medication administration, the stopcock on the connecting tubing can be closed to prevent the patient's blood from flowing out of the connecting tubing.

[0014] 3. This improved hemodialysis indwelling needle, by setting up a squeezing block, a telescopic plate, a spring plate, a baffle, and a fixing block, can push the squeezing block upward. At this time, the telescopic plate can move under the squeezing of the baffle. When the telescopic plate moves behind the baffle, it can be popped out by the limiting plate under the elasticity of the spring plate. At this time, the baffle can limit the squeezing block, and the squeezing block, with the cooperation of the fixing block, can achieve the purpose of stopping the flow of the connecting tubing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the limiting sleeve of this utility model;

[0017] Figure 3 This is a schematic diagram of the flow-stopping sleeve in Embodiment 2 of this utility model.

[0018] Reference numerals in the attached diagram: 1. Tee tube; 2. Indwelling hose; 3. Limiting sleeve; 4. Connecting tube; 5. Flow stop sleeve; 6. Connecting hose; 7. Steel needle seat; 8. Needle holder handle; 9. Sleeve handle; 10. Limiting ring; 11. Spring plate; 12. Fixing block; 13. Limiting plate; 14. Telescopic plate; 15. Pressing plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1: Please refer to Figures 1-2 As shown in this embodiment: an improved hemodialysis indwelling needle, firstly, the limiting cannula 3 is fitted onto the indwelling tubing 2 via the cannula handle 9. The cannula handle 9 is located on both sides of the limiting cannula 3, facilitating the operator to adjust the position and fixing force of the limiting cannula 3. The material of the cannula handle 9 should be soft and durable medical-grade plastic or rubber to increase the operator's comfort and grip stability. Medical-grade plastic should be used. The position of the limiting cannula 3 is adjusted using the cannula handle 9, and it can be stably fixed onto the indwelling tubing 2 by the limiting ring 10. The position of the limiting cannula 3 on the indwelling tubing 2 can be adjusted by holding the cannula handle 9, which can, to a certain extent, allow medical staff to grasp the size and prevent the steel needle from completely passing through the blood vessel, affecting the patient's hemodialysis. Then, the operator can hold the needle holding handle 8 and insert the steel needle and steel needle seat 7 into the indwelling tubing 2 through the right side of the three-way tube 1. In the tubing 2, the steel needle should be made of medical-grade stainless steel or other suitable metal material. Align the indwelling tubing 2 with the patient's hemodialysis site and steadily advance the steel needle for puncture. After confirming successful puncture, the steel needle can be withdrawn through the needle hub 7 and the needle handle 8. Place one end of the indwelling tubing 2 into the patient's blood vessel. The indwelling tubing 2 is made of soft and durable medical-grade plastic to reduce patient discomfort. At this time, the stopcock 5 on the three-way tube 1 can be closed to prevent blood from flowing out from the right side of the three-way tube 1. When medication is needed, the stopcock 5 on the connecting tubing 6 can be opened, and medication can be injected into the three-way tube 1 through the connecting tubing 6. The medication can flow into the patient's blood vessel through the indwelling tubing 2, thus achieving medication administration. After medication administration, the stopcock 5 on the connecting tubing 6 can be closed to prevent the patient's blood from flowing out of the connecting tubing 6.

[0021] Example 2: Figure 3As shown, the difference between the scheme of this embodiment 2 and the scheme of embodiment 1 is that: the bottom surface of the baffle fixedly installed on the upper part of the through hole on one side of the flow-stop sleeve 5 is inclined; a fixing block 12 is fixedly installed on the lower part of the inner wall of one side of the flow-stop sleeve 5; a limiting plate 13 is placed in the cavity opened inside the extrusion block; one side of the limiting plate 13 is fixedly connected to the side of the telescopic plate 14 located in the cavity opened in the extrusion block; a spring plate 11 is fixedly installed on the side of the limiting plate 13 away from the telescopic plate 14; the spring plate 11 can provide a restoring force to the telescopic plate 14, ensuring that the extrusion block 8 can automatically reset when no external force is applied; the spring plate 11 is away from the limiting plate 13. One side of the compression block 8 is fixedly connected to the inner wall of the cavity. A pressing plate 15 is fixedly installed on one side wall of the telescopic plate 14. The compression block has a through hole extending to the telescopic plate 14 on one side of the pressing plate 15. The pressing plate 15 moves within the through hole. By pressing the pressing plate 15, the telescopic plate 14 is moved, causing the telescopic plate 14 to separate from the baffle and rotate the compression block down. At this time, the function of the connecting hose 6 can be restored. The upper and lower parts of the flow stop sleeve 5 are provided with through holes that penetrate and extend into the interior of the flow stop sleeve 5. The through holes are larger than the outer diameter of the connecting hose 6, which makes it convenient to adjust the position of the flow stop sleeve 5 in the connecting hose 6.

[0022] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An improved haemodialysis retention needle comprising a three-way tube (1), characterised in that: A ferrule (2) is fixedly installed on the left side of the three-way pipe (1). A limiting sleeve (3) is fitted around the outer ring of the ferrule (2). An installation groove is provided on the inner wall of the middle part of the limiting sleeve (3), and a limiting ring (10) is fixedly installed in the installation groove. A connecting pipe (4) is installed on one side of the three-way pipe (1). A connecting hose (6) is fixedly installed at the other end of the connecting pipe (4). A flow stop sleeve (5) is provided on the outer ring of the connecting hose (6) and the outer ring of the right side of the three-way pipe (1).

2. The improved hemodialysis retention needle according to claim 1, wherein: Both sides of the limiting sleeve (3) are fixedly equipped with sleeve handles (9).

3. The improved hemodialysis retention needle according to claim 1, wherein: The limiting ring (10) installed on the inner wall of the middle part of the limiting sleeve (3) is made of medical rubber.

4. The improved hemodialysis retention needle according to claim 1, wherein: A steel needle that penetrates the indwelling tubing (2) is inserted into the right side of the three-way tube (1), and a steel needle seat (7) is installed at the right end of the steel needle.

5. An improved hemodialysis indwelling needle according to claim 4, characterized in that: A needle holder (8) is fixedly installed on one side of the steel needle holder (7).

6. An improved hemodialysis indwelling needle according to claim 5, characterized in that: The right side of the three-way pipe (1) and the location where the stop sleeve (5) is installed is a flexible hose.

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