Artery puncture needle

Abstract

The utility model relates to the field of medical equipment, in particular to an artery puncture needle which comprises a syringe barrel, a plunger and a puncture needle, the hollow puncture needle is arranged in the plunger, the front end of the syringe barrel is connected with a needle sleeve, and the rear end of the syringe barrel is provided with a sealing device capable of being opened and closed. A branch tube is arranged at the front end of the syringe barrel, a sliding cavity, a sliding rod, a spring and an indicating ring are arranged in the branch tube, and whether puncture succeeds and enters an artery blood vessel can be judged according to whether the indicating ring slides out of the indicating cavity. A side hole is formed in the middle of the puncture needle, so that contrast agent injection and needle point observation are facilitated. The needle point of the puncture needle is bent towards the needle eye to prevent puncture of the opposite-side blood vessel wall. The sealing device adopts a silica gel sealing valve, so that the leakproofness during puncture is ensured, and the subsequent operation is facilitated. A push handle is arranged at the tail of the plunger to facilitate injection of contrast agents. A bolt column is arranged on the outer wall of the syringe barrel, a fixing groove is formed in the outer side of the plunger, the position of the plunger can be fixed according to the contrast agent amount, and puncture and contrast agent injection are facilitated. The artery puncture needle is convenient to use, good in sealing performance, clean and sanitary, whether puncture succeeds or not can be accurately judged, and unnecessary vascular injury is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an arterial puncture needle. Background Technology

[0002] Interventional vascular surgery is a minimally invasive treatment method that involves inserting medical devices such as guidewires and catheters through a punctured blood vessel to diagnose and treat lesions within the vessel. Establishing a secure arterial access is crucial in this process, as it directly affects the success of the interventional procedure.

[0003] Given the parallel distribution of arteries and veins in the human body, a needle with an open end is typically used for punctures. Because arterial blood pressure is higher, once the needle successfully punctures the artery, the presence of blood spurting from the end of the needle handle indicates accurate entry into the artery. After the physician inserts the needle into the target vessel, blood will spurt from the open end of the needle handle. At this point, an assistant is often needed to quickly insert the guidewire into the vessel lumen. However, this process is time-consuming, taking approximately 5 to 10 seconds, and involves relatively significant bleeding, especially for inexperienced physicians. If the procedure is prolonged, air may enter the blood vessel due to the needle not being sealed, potentially leading to air embolism.

[0004] In vascular interventional surgery, after the puncture needle is inserted into the target blood vessel, ideally the needle tip should be located in the center of the vessel lumen. This facilitates the smooth entry of subsequent instruments such as guidewires and catheters, and also helps to avoid unnecessary damage to the blood vessel. However, arterial puncture is a blind procedure, and once the target blood vessel is punctured, the physician often cannot directly confirm the exact location of the needle tip. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an arterial puncture needle that maintains a sealed state during puncture and indicates whether an artery has been punctured, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An arterial puncture needle includes a syringe barrel, a plunger slidably connected inside the syringe barrel, a needle sleeve connected to the front end of the syringe barrel, a hollow puncture needle fixed inside the plunger, the puncture needle passing through the plunger and the syringe barrel and extending to the outside of the needle sleeve, the puncture needle moving along the needle sleeve, and an openable and closable sealing device for sealing the puncture needle at the rear end of the plunger.

[0008] The syringe barrel has a branch tube at its front end, and a sliding cavity and a sliding rod are provided inside the branch tube. The sliding rod is located in the sliding cavity and can move back and forth along it. The sliding cavity includes a slide channel, a spring cavity, and an indicator cavity from front to back. The sliding cavity in the branch tube is connected to the needle sheath. A sealing ring is installed at the front end of the sliding rod and is located in the slide channel. An annular groove is provided in the middle of the sliding rod and is located in the spring cavity. A spring is fixed in the annular groove and the other end of the spring abuts against the spring cavity. An indicator ring is fixed at the rear end of the sliding rod and is located in the indicator cavity. The pressure of arterial blood pushes the sliding rod to move the indicator ring out of the indicator cavity.

[0009] As a further preferred embodiment, the outer side of the indicator ring is provided with an indicator mark.

[0010] As a further preferred embodiment, a side hole is provided at the position where the puncture needle connects to the plunger.

[0011] As a further preferred embodiment, the tip of the puncture needle has an oblique section, and the oblique section is concave arc-shaped.

[0012] As a further preferred embodiment, the openable and closable sealing device is a silicone sealing valve. The silicone sealing valve has a columnar structure and is provided with an openable and closable cross-shaped opening. The cross-shaped opening is connected to the hollow part of the puncture needle. The silicone sealing valve is provided with a fixing ring on its side. The plunger is provided with stepped grooves symmetrically on its rear inner side. The silicone sealing valve is fixed in the groove.

[0013] As a further preferred embodiment, the plunger tail is provided with a push handle, and the push handle has a hole that faces the cross-shaped opening on the end face of the silicone sealing valve.

[0014] As a further preferred embodiment, a plunger is provided on the outer wall of the syringe barrel, and several fixing grooves corresponding to the plunger are provided on the outer side of the plunger.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The arterial puncture needle provided by this invention allows for quick confirmation of successful entry into the target blood vessel by visually observing whether the indicator ring smoothly slides out of the indicator cavity during vascular puncture, greatly improving ease of use. Furthermore, the device is designed with a sealed structure to ensure no blood leakage and avoid direct contact with air, thereby maintaining a clean and sterile operating environment, improving hygiene standards, and reducing the risk of infection during surgery. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 for Figure 1 Rear cross-sectional view;

[0019] Figure 3 This is a schematic diagram of the structure where the indicator ring is located inside the indicator cavity;

[0020] Figure 4 A schematic diagram of the structure where the indicator ring slides out of the indicator cavity;

[0021] Figure 5 This is a schematic diagram of the structure of the tip of a puncture needle;

[0022] Figure 6 A schematic diagram of the posterior part of an arterial puncture needle;

[0023] Figure 7 This is a schematic diagram of a silicone sealing valve.

[0024] In the above diagram: 1. Syringe barrel; 11. Needle sheath; 12. Bolt; 2. Plunger; 21. Puncture needle; 22. Side hole; 23. Push handle; 24. Fixing groove; 25. Silicone sealing valve; 3. Branch tube; 31. Slide rod; 311. Annular groove; 312. Indicator ring; 32. Slide rail; 33. Spring cavity; 34. Indicator cavity; 35. Sealing ring; 36. Spring. 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. 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.

[0026] like Figure 1 As shown, this utility model provides an arterial puncture needle. A plunger 2 is slidably connected inside a syringe barrel 1. A needle sleeve 11 is connected to the front end of the syringe barrel 1. A hollow puncture needle 21 is fixed inside the plunger 2. The puncture needle 21 passes through the plunger 2 and the syringe barrel 1 and extends to the outside of the needle sleeve 11. The puncture needle 21 moves along the needle sleeve 11. An openable and closable sealing device is provided at the rear end of the plunger 2 to seal the hollow part of the puncture needle 21 and the inside of the plunger 2.

[0027] like Figures 1 to 3As shown, the front end of the syringe barrel 1 is provided with a branch tube 3. The branch tube 3 is provided with a sliding cavity and a sliding rod 31. The sliding rod 31 is located in the sliding cavity and can move back and forth along it. The sliding cavity includes a slide channel 32, a spring cavity 33 and an indicator cavity 34 from front to back. The sliding cavity in the branch tube 3 is connected to the needle sheath 11. A sealing ring 35 is installed at the front end of the sliding rod 31. The sealing ring 35 is located in the slide channel 32. An annular groove 311 is provided in the middle of the sliding rod 31. The annular groove 311 is located in the spring cavity 33. A spring 36 is fixed in the annular groove 311. The other end of the spring 36 abuts against the spring cavity 33. An indicator ring 312 is fixed at the rear end of the sliding rod 31. The indicator ring 312 is located in the indicator cavity 34. The pressure of arterial blood pushes the sliding rod 31 and drives the indicator ring 312 to slide out of the indicator cavity 34. An indicator mark is provided on the outside of the indicator ring 312.

[0028] Specifically, a sealing ring 35 is provided at the front end of the slide rod 31. The sealing ring 35 is located inside the slide rail 32 to ensure that the front end of the sealing ring 35 is in a sealed state inside the branch pipe 3.

[0029] Specifically, when the spring 36 is not compressed, the indicator ring 312 is located inside the indicator cavity. When the spring 36 is compressed, the slide rod 31 slides backward along the slide cavity, and the indicator ring 312 slides out of the indicator cavity. When the pressure disappears, the spring 36 returns to its original position, and the indicator ring 312 slides back into the indicator cavity 312.

[0030] When the physician inserts the puncture needle into the lumen of an artery, blood enters the needle. A sealing device at the rear end of the arterial puncture needle prevents blood from spurting out. When blood enters branch tube 3, the blood pressure compresses the slide rod 31, causing it to slide backward and pull the indicator ring 312 out of the indicator cavity 34. When a vein is punctured, the blood pressure is low enough not to compress the spring 36, nor to push the slide rod 31 along the cavity. The plunger 2 has an openable and closable sealing device at its rear end, and the slide rod 31 has a sealing ring 35 at its front end, preventing blood loss and ensuring a sealed, airtight environment that is clean and hygienic.

[0031] Furthermore, an indicator mark is provided on the outer side of the indicator ring 312. In a specific embodiment, the indicator mark is a colored mark located on the outer side of the indicator ring 312. When the target blood vessel is pierced, if the blood pressure compresses the spring 36, the colored mark will be exposed, indicating that an artery has been pierced. If no indicator mark is exposed, it indicates that a vein has been pierced or that no blood vessel has been pierced, making it immediately clear. Figure 3 As shown, the indicator ring 312 is located inside the indicator cavity 34. Figure 4 As shown, this is the state in which the indicator ring 312 slides out of the indicator cavity 34.

[0032] This invention's arterial puncture needle allows for easy identification of the target blood vessel during vascular puncture by using indicator rings 312 to determine if the needle has slipped out of the indicator cavity 34. Furthermore, the entire device is sealed, preventing blood loss and contact with air, ensuring cleanliness and hygiene.

[0033] Furthermore, such as Figure 2 and Figure 3 As shown, a side hole 22 is provided in the middle of the puncture needle 21 near the plunger 2. The side hole 22 is designed to facilitate the injection of contrast agent into the target blood vessel, thereby making it easier to clearly observe and confirm the specific position and orientation of the needle tip in enhanced CT images. This design helps to accurately adjust the needle tip to the optimal position and direction, facilitating the subsequent smooth insertion of medical devices such as guidewires and catheters, and effectively reducing the risk of unnecessary damage to blood vessels.

[0034] Furthermore, such as Figure 5 As shown, the tip of the puncture needle 21 is bent towards its puncture site. The tip of the puncture needle 21 has a beveled section with an inwardly concave arc shape. This allows the needle to be gently pressed down and advanced after successfully penetrating the target blood vessel, effectively preventing accidental puncture of the opposite blood vessel wall during further punctures.

[0035] Furthermore, the openable and closable sealing device is a silicone sealing valve 25. For example... Figure 2 and Figure 7 As shown, the plunger 2 has symmetrical stepped grooves on its inner rear side. The silicone sealing valve 25 is a cylindrical structure with a cross-shaped opening that communicates with the hollow part of the puncture needle 21. A fixing ring is provided on the side of the silicone sealing valve 25, which is fixed within the stepped groove. Within the stepped groove, the fixing ring of the silicone sealing valve 25 is pressed tightly against the steps of the groove. The design of the silicone sealing valve 25 ensures both the sealing of the plunger 2 during puncture and the opening for the insertion of the guide wire, facilitating subsequent surgical procedures.

[0036] Furthermore, such as Figure 7 As shown, the plunger 2 has a push handle 23 at its tail end, and the push handle 23 has a hole facing the cross-shaped opening on the end face of the silicone sealing valve 25. The push handle 23 facilitates the injection of contrast agent into the target blood vessel.

[0037] Furthermore, such as Figure 7 A plunger 12 is provided on the outer wall of the syringe barrel 1, such as Figure 6As shown, several fixing grooves 24 are provided on the outer side of the plunger 2. By engaging the plunger 12 with different fixing grooves 24, the plunger 2 can be fixed at different positions in the syringe barrel 1. Before puncture, contrast agent is drawn into the syringe barrel 1. During puncture, depending on the amount of contrast agent, the plunger 2 and syringe barrel 1 can be fixed relative to each other by engaging the plunger 12 with different fixing grooves 24, facilitating the puncture. When contrast agent is needed, the engagement of the plunger 12 with the fixing grooves 24 is released, allowing the plunger 2 to be pushed into the target blood vessel to inject the contrast agent.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An arterial puncture needle, comprising a syringe barrel (1), characterized in that: A plunger (2) is slidably connected inside the syringe barrel (1). A needle sleeve (11) is connected to the front end of the syringe barrel (1). A hollow puncture needle (21) is fixed inside the plunger (2). The puncture needle (21) passes through the plunger (2) and the syringe barrel (1) and extends to the outside of the needle sleeve (11). The puncture needle (21) moves along the needle sleeve (11). An openable and closable sealing device for sealing the puncture needle (21) is provided at the rear end of the plunger (2). The syringe barrel (1) has a branch tube (3) at its front end. The branch tube (3) has a sliding cavity and a slide rod (31). The slide rod (31) is located in the sliding cavity and can move back and forth along it. The sliding cavity includes a slide channel (32), a spring cavity (33), and an indicator cavity (34) from front to back. The sliding cavity in the branch tube (3) is connected to the needle sheath (11). A sealing ring (35) is installed at the front end of the slide rod (31). The sealing ring (35) is located in the slide channel (32). The slide rod (31) has an annular groove (311) in the middle. The annular groove (311) is located in the spring cavity (33). A spring (36) is fixed in the annular groove (311). The other end of the spring (36) abuts against the spring cavity (33). An indicator ring (312) is fixed at the rear end of the slide rod (31). The indicator ring (312) is located in the indicator cavity (34). The pressure of arterial blood pushes the slide rod (31) to drive the indicator ring (312) to slide out of the indicator cavity (34).

2. The arterial puncture needle according to claim 1, characterized in that: The indicator ring (312) has an indicator mark on its outer side.

3. The arterial puncture needle according to claim 1, characterized in that: A side hole (22) is provided at the position where the puncture needle (21) connects to the plunger (2).

4. An arterial puncture needle according to claim 3, characterized in that: The tip of the puncture needle (21) has an oblique section, which is an inwardly concave arc shape.

5. An arterial puncture needle according to claim 1, characterized in that: The openable and closable sealing device is a silicone sealing valve (25). The silicone sealing valve (25) has a columnar structure and is provided with an openable and closable cross-shaped opening. The cross-shaped opening is connected to the hollow part of the puncture needle (21). The silicone sealing valve is provided with a fixing ring on the side. The plunger (2) is provided with stepped grooves symmetrically on the inner side of the rear part. The silicone sealing valve (25) is fixed in the groove.

6. An arterial puncture needle according to claim 5, characterized in that: The plunger (2) is provided with a push handle (23) at its tail end. The push handle (23) has a hole that faces the cross-shaped opening on the end face of the silicone sealing valve (25).

7. An arterial puncture needle according to claim 1, characterized in that: The syringe barrel (1) is provided with a plunger (12) on its outer wall, and the plunger (2) is provided with a number of fixing grooves (24) corresponding to the plunger (12) on its outer side.

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