Double-cavity injection needle device capable of being withdrawn

Abstract

The utility model belongs to the field of injection needles, particularly relates to a pumpable double-cavity injection needle device, and aims to solve the problems that an existing hyaluronic acid injection needle is provided with a single cavity, whether the needle is placed in a blood vessel or not cannot be clearly confirmed before injection, so that an injection object is possibly injected into the blood vessel by mistake, and adverse complications such as tissue necrosis are caused by vascular embolism. According to the scheme, the device comprises a blood return needle cylinder, a medicine injection needle cylinder is fixedly arranged in the blood return needle cylinder, the front end of the blood return needle cylinder is in threaded connection with a connector, the connector is communicated with the blood return needle cylinder, one side of the connector is fixedly communicated with a blood return needle tube, and a medicine injection channel is fixedly arranged in the blood return needle tube. Through the arrangement of the double-cavity needle cylinder and the double-cavity needle tube, whether the needle head is in a blood vessel or not can be determined before injection, so that bad complications such as tissue necrosis and the like caused by the fact that liquid medicine is injected into the blood vessel due to the improper position of the needle head are avoided.

Description

Technical Field

[0001] This utility model relates to the field of injection device technology, and in particular to a retractable double-lumen injection needle device. Background Technology

[0002] A syringe is a commonly used medical device, typically consisting of a syringe barrel, a piston, and an injection needle. It is used to penetrate the skin or other tissue layers and deliver drugs, vaccines, blood, or other fluids accurately to specific sites or blood vessels in the body by manually or mechanically pushing the piston, achieving medical purposes such as treatment, vaccination, blood collection, or infusion.

[0003] Currently, existing injection materials use single-lumen needles, which cannot accurately confirm whether the needle is placed in a blood vessel before injection. This can lead to the medication being mistakenly injected into a blood vessel, causing tissue necrosis, local pain, hematoma, or even more serious complications, bringing unnecessary pain and risks to patients. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies where it is impossible to accurately confirm whether the needle is placed in the blood vessel before injection, which may lead to the medication being mistakenly injected into the blood vessel and causing adverse complications such as tissue necrosis. Therefore, this invention proposes a retractable double-lumen injection needle device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A retractable dual-lumen injection needle device, comprising:

[0007] A blood return syringe, wherein an injection syringe is fixedly installed inside the blood return syringe, and a connector is threaded to the front end of the blood return syringe. The connector is connected to the blood return syringe, and a blood return needle tube is fixedly connected to one side of the connector. An injection needle tube is fixedly installed inside the blood return needle tube.

[0008] In one possible design, the interior of the blood return syringe is divided into a blood return channel one by the injection syringe, and the interior of the blood return tube is divided into a blood return channel two by the injection tube.

[0009] In one possible design, a piston is slidably and sealed outside the injection syringe within the blood return channel. A connecting cylinder is fixedly mounted on one side of the piston, and a push handle is fixedly mounted on one side of the connecting cylinder. A piston is slidably and sealed inside the injection syringe. A push rod is fixedly mounted on one side of the piston, and a push handle is fixedly mounted on one side of the push rod.

[0010] In one possible design, the connecting cylinder has a notch, the size of which is adapted to the push handle.

[0011] In one possible design, the outside of the blood return syringe is provided with graduation lines.

[0012] In one possible design, a sealing ring is fixedly installed inside the connector.

[0013] In one possible design, pusher plates are fixedly installed on both sides of the opening of the blood return syringe.

[0014] In this application, upon initial use, the front end of the blood return syringe is first assembled and connected to the connector and the needle tube thereon, ensuring that the sealing ring inside the connector is intact to guarantee a tight seal. Then, the connection between the blood return syringe and the blood return needle tube is disconnected, the required medication is extracted and introduced into the injection syringe, and then the syringe and needle tube are reconnected. The first blood return channel in the blood return syringe is connected to the second blood return channel in the blood return needle tube, and the injection syringe is connected to the injection needle tube, ensuring that both pistons are in their initial positions (e.g., ...). Figure 1 (as shown)

[0015] The needle is then inserted into the injection point under the patient's skin. At this time, the push handle is pulled. As the push handle is pulled, the piston moves towards the booster plate end through the connecting tube, thereby creating negative pressure in the blood return channels one and two to aspirate the blood in the blood vessel. (If there is blood in the blood return channels one or two during this process, it means that the needle is inserted into the blood vessel. The needle is then pulled out and reinserted into a new injection point until no more blood is drawn, thus reducing the risk of embolism.) When blood is drawn out, it means that the needle is in the blood vessel and injection should not be performed.

[0016] Then push the second push handle. As the second push handle is pushed, it drives the second piston to move towards the needle tip inside the injection syringe via the push rod. This injects the medication in the injection syringe into the patient's pre-injection tissue through the injection needle tube. During the injection process, as the second push handle moves, it will engage with the notch in the connecting tube, making the second push handle and the first push handle at the same level. Then push the first push handle and the second push handle simultaneously, causing them to drive the first piston and the second piston forward at the same time. Due to the synchronous movement of the first piston and the second piston, there is no obstruction, which facilitates the injection operation.

[0017] This utility model has the following beneficial effects:

[0018] This invention, through the design of a blood return syringe, a blood return needle tube, a drug injection needle tube, and a drug injection syringe, can effectively confirm whether the needle is inserted into the blood vessel before injection, thereby avoiding the injection of drug into the blood vessel due to improper needle position, reducing the risk of embolism, and preventing adverse complications such as tissue necrosis and other medical accidents.

[0019] This invention integrates blood return and drug injection functions into the same device, simplifying the operation process for medical staff and improving work efficiency. At the same time, the synchronous movement design of the piston facilitates injection operations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a retractable dual-lumen injection needle device proposed in this utility model.

[0021] Figure 2 This is a schematic diagram of the separation structure of the blood return syringe and connector of the retractable double-lumen injection needle device proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the overall separation structure of the blood return syringe of the retractable double-lumen injection needle device proposed in this utility model;

[0023] Figure 4 This is a cross-sectional structural diagram of the blood return syringe, blood return needle tube, drug injection needle tube, and drug injection syringe of a retractable double-lumen injection needle device proposed in this utility model.

[0024] In the diagram: 1. Blood return syringe; 101. Blood return channel one; 2. Connector; 201. Anti-slip stripe; 3. Blood return needle tube; 301. Blood return channel two; 4. Injection needle tube; 5. Injection syringe; 6. Piston one; 7. Connecting cylinder; 701. Notch; 8. Push handle one; 9. Piston two; 10. Push rod; 11. Push handle two; 12. Sealing ring; 13. Scale line; 14. Push plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] Reference Figure 1-4 An injection needle device, comprising:

[0028] The system includes components such as a blood return syringe 1, a drug injection syringe 5, a connector 2, a blood return tube 3, and a drug injection tube 4. The blood return syringe 1 is a transparent cylinder, inside which the drug injection syringe 5 is fixedly installed. The drug injection syringe 5 is also made of transparent material. This design allows medical staff to clearly observe the liquid conditions inside the blood return syringe 1 and the drug injection syringe 5, including the amount of drug and the blood return flow rate.

[0029] The front end of the blood return syringe 1 is connected to the connector 2 via a threaded connection. A blood return needle tube 3 is fixedly connected to one side of the connector 2. An injection needle tube 4 is fixedly installed inside the blood return needle tube 3. The blood return needle tube 3 and the injection needle tube 4 form two independent channels, namely the blood return channel and the injection channel. This design allows the blood return and injection operations to be performed separately without interfering with each other.

[0030] The interior of the blood return syringe 1 is divided into a blood return channel 101 by the injection syringe 5, and the interior of the blood return needle tube 3 is divided into a blood return channel 301 by the injection needle tube 4. These two channels are structurally independent, but functionally they cooperate to achieve the function of blood return.

[0031] Inside the blood return channel 101, a piston 6 is slidably and sealed. A connecting cylinder 7 is fixedly installed on one side of the piston 6, and a push handle 8 is fixedly installed on one side of the connecting cylinder 7. By pushing or pulling the push handle 8, the piston 6 can be moved within the blood return channel 101, thereby generating negative or positive pressure to achieve blood extraction or injection. Similarly, inside the injection syringe 5, a piston 9 is slidably and sealed. A push rod 10 is fixedly installed on one side of the piston 9, and a push handle 11 is fixedly installed on one side of the push rod 10. By pushing or pulling the push handle 11, the piston 9 can be moved within the injection syringe 5 to achieve drug extraction or injection.

[0032] The connecting cylinder 7 has a notch 701, the size of which is adapted to the push handle 11. During the injection process, when the push handle 11 is engaged in the notch 701, it can drive the connecting cylinder 7 to move synchronously. In this way, the piston 6 and the piston 9 can be pushed forward at the same time, so that the liquid medicine can enter the pre-injection area, improving the efficiency and safety of the injection.

[0033] This application can be used in the field of retractable dual-lumen injection needle devices, or in other fields applicable to this application.

[0034] Example 2

[0035] Based on Embodiment 1, Embodiment 2 further includes: a retractable double-lumen injection needle device, which is applied to the technical field of retractable double-lumen injection needle devices. In order to more accurately control the amount of medicine, the outside of the blood return syringe 1 is provided with a scale line 13. Medical staff can observe the scale line 13 to accurately control the movement distance of the piston, thereby ensuring that the amount of medicine injected each time is accurate.

[0036] In addition, a sealing ring 12 is fixedly installed inside the connector 2 to ensure the sealing of the connection. During assembly, it is necessary to ensure that the sealing ring 12 is intact to avoid leakage of medicine or blood.

[0037] To facilitate operation by medical staff, push plates 14 are fixedly installed on both sides of the opening of the blood return syringe 1. The push plates 14 can provide additional gripping points, making it easier for medical staff to push or pull the handle.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A retracting dual lumen injection needle device, characterized by, Include: The blood return syringe (1), the inside of blood return syringe (1) is fixedly provided with injection syringe (5), the front end of blood return syringe (1) is threadedly connected with connector (2), the connector (2) is communicated with blood return syringe (1), one side of the connector (2) is fixedly communicated with blood return needle tube (3), the inside of blood return needle tube (3) is fixedly provided with injection needle tube (4).

2. A retracting dual lumen syringe needle device according to claim 1, wherein, The inside of blood return syringe (1) is divided into blood return channel one (101) by injection syringe (5), the inside of blood return needle tube (3) is divided into blood return channel two (301) by injection needle tube (4).

3. A retracting dual lumen syringe needle device according to claim 2, wherein, The outside of injection syringe (5) is sealingly and slidably provided with piston one (6) in blood return channel one (101), one side of piston one (6) is fixedly provided with connecting barrel (7), one side of connecting barrel (7) is fixedly provided with push handle one (8), the inside of injection syringe (5) is sealingly and slidably provided with piston two (9), one side of piston two (9) is fixedly provided with push rod (10), one side of push rod (10) is fixedly provided with push handle two (11).

4. A retracting dual lumen syringe needle device according to claim 3, wherein, The connecting barrel (7) is provided with notch (701), the size of notch (701) is matched with push handle two (11).

5. The retracting dual lumen syringe needle device of claim 1, wherein, The outside of blood return syringe (1) is provided with scale line (13).

6. The retracting dual lumen syringe needle device of claim 1, wherein, The inside of connector (2) is fixedly provided with sealing ring (12).

7. The retracting dual lumen syringe needle device of claim 1, wherein, Both sides of the opening of blood return syringe (1) are fixedly provided with even push plate (14).

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