Multifunctional arterial blood gas blood taking needle

Abstract

The utility model relates to the technical field of arterial blood gas blood taking needles, and particularly discloses a multifunctional arterial blood gas blood taking needle which comprises a syringe, the syringe comprises a syringe needle, a syringe tube and a push rod, one end of the syringe tube is provided with a Luer interface, and the syringe needle is detachably connected with the syringe tube through the Luer interface; the push rod is slidably arranged in the syringe, and one end of the push rod extends out of the syringe; the sealing piece is arranged at one end of the push rod and connected with the push rod; a connecting part is arranged at one end of the protective cap, an abutting part is arranged at the other end of the protective cap, and the protective cap can be detachably connected with the Luer interface in a threaded mode through the connecting part and can also be inserted into the end, away from the syringe, of the push rod through the abutting part. The method has the effects of improving the blood drawing efficiency and ensuring the consistency and accuracy of blood samples.

Description

Technical Field

[0001] The present application relates to the technical field of arterial blood gas sampling needles, and in particular to a multifunctional arterial blood gas sampling needle. Background Art

[0002] At present, arterial blood gas analysis is an important clinical detection method. Through arterial blood gas analysis, medical staff can obtain real-time data on the patient's respiratory function, metabolic status and acid-base balance, thereby evaluating the patient's blood oxygen level, carbon dioxide level and acid-base balance. In order to perform arterial blood gas sampling, it is usually necessary to use a special arterial blood gas collection needle to collect arterial blood samples. This needle has good puncture performance and blood collection ability to ensure the smooth sampling process and the accuracy of the data.

[0003] Traditional arterial blood gas sampling needles are generally composed of a needle and a syringe. When collecting arterial blood samples, medical personnel need to use one hand to operate the needle to puncture the patient's artery, and then use the other hand to operate the syringe to collect blood samples. However, when collecting blood samples, the blood collection effect is easily affected by changes in vascular pressure, and the quality of arterial blood sample collection and the blood collection effect depend on the operation level of medical personnel. Therefore, it is very easy to cause the quality of the collected blood samples to be unstable due to differences in operator skills, and it is difficult to ensure the consistency and accuracy of the collected blood samples. Utility Model Content

[0004] In order to improve the problem of unstable quality of arterial blood samples due to external factors during arterial blood sample collection, the present application provides a multifunctional arterial blood gas collection needle.

[0005] The multifunctional arterial blood gas sampling needle provided in this application adopts the following technical solution:

[0006] A multifunctional arterial blood gas sampling needle, comprising:

[0007] A syringe, the syringe comprising an injection needle, a syringe barrel and a push rod, one end of the syringe barrel is provided with a Luer interface, the injection needle is detachably connected to the syringe barrel through the Luer interface; the push rod is slidably arranged in the syringe barrel, and one end of the push rod extends out of the syringe barrel, the push rod is arranged as a hollow rod body with two ends open, and pulling the push rod can form a blood storage chamber for temporarily storing a blood sample in the syringe barrel, one end of the blood storage chamber is communicated with the injection needle, and the other end of the blood storage chamber is communicated with the push rod;

[0008] A sealing member, the sealing member is arranged at one end of the push rod away from the injection barrel, the sealing member is fixedly connected to the inner wall of the push rod, and the sealing member can block the push rod, thereby closing one end of the push rod;

[0009] A protective cap, one end of the protective cap is provided with a connecting portion, and the other end of the protective cap is provided with an abutting portion. The protective cap can be detachably connected to the Luer connector through the connecting portion by threading, and the protective cap can also be inserted into one end of the push rod away from the syringe barrel through the abutting portion. At this time, the abutting portion abuts against the sealing member, so that the sealing member is opened.

[0010] By adopting the above technical solution, the sealing member provided at one end of the push rod enables one end of the blood storage chamber to be blocked. When the sealing member is opened by the protective cap, the blood storage chamber is communicated with the external atmospheric pressure. When the arterial blood collection needle is used for blood collection, blood will automatically flow into the blood storage chamber due to the pressure difference between the pressure in the blood vessel and the atmospheric pressure, so as to realize automatic blood drawing.

[0011] When facing patients with blood pressure lower than the normal level, the efficiency of automatic blood drawing will be significantly reduced. Then the protective cap can be removed to close the sealing member. At this time, the push rod can be manually pulled to perform manual blood drawing, so as to improve the blood drawing efficiency when facing patients with blood pressure lower than the normal level. The combined use of the sealing member and the protective cap not only enables the arterial blood collection needle to have the functions of a general syringe, but also adds the function of automatic blood drawing using the pressure difference, which not only improves the blood drawing efficiency, but also ensures the quality of the collected blood sample, thus ensuring the consistency and accuracy of the blood sample, and further enhancing the patient experience.

[0012] Optionally, the sealing member includes a sealing sleeve and a puncture seat. The puncture seat is coaxially fixed in the push rod. A puncture portion is fixedly provided at one end of the puncture seat away from the syringe barrel. And a ventilation hole that penetrates through the puncture seat and the puncture portion is provided at one end of the puncture seat. The sealing sleeve is sleeved on the puncture portion, and one end of the sealing sleeve is fixedly connected to the puncture seat; by applying pressure to the sealing sleeve, the sealing sleeve is pierced by the puncture portion, so that the ventilation hole is opened.

[0013] By adopting the above technical solution, the design of the sealing sleeve and the puncture seat enables the push rod to be completely sealed when not in use, and when needed, the ventilation hole can be quickly opened only by applying pressure to the sealing sleeve. The operation is safe and simple, and it ensures the smooth movement of the blood sample in the push rod, prevents air bubbles from entering the blood sample, and maintains the integrity and accuracy of the blood sample.

[0014] Optionally, the sealing sleeve is arranged in a cylindrical shape with one end open, and a return spring is embedded in the sealing sleeve.

[0015] By adopting the above technical solution, the design of the cylindrical rubber tube and the return spring can automatically restore the sealing state after the sealing sleeve is punctured, prevent blood leakage, and improve the safety of blood collection. The return spring ensures the reusability of the sealing sleeve, enhances the durability and reliability of the device, and reduces the generation of medical waste.

[0016] Optionally, a clamping portion is provided at one end of the push rod close to the blood storage chamber. A rubber plug is provided on the push rod. A clamping ring groove is formed on the outer peripheral wall of the rubber plug. The rubber plug is connected to the clamping portion through the clamping ring groove. A communication hole is formed through one end of the rubber plug. A sealing is provided between the syringe barrel, the push rod, and the rubber plug.

[0017] By adopting the above technical solution, the design of the clamping portion and the rubber plug ensures the sealing between the push rod and the blood storage chamber, guaranteeing the accuracy and safety of the blood sample. The presence of the rubber plug prevents the blood sample from leaking during the pushing and pulling process, ensuring the cleanliness and hygiene of the operation and enhancing the patient experience.

[0018] Optionally, a hemostatic member is provided on the rubber plug. The hemostatic member is cylindrical. The hemostatic member is inserted into the communication hole, and a gap is left between the hemostatic member and the communication hole. The push rod communicates with the blood storage chamber; when the hemostatic member comes into contact with blood, the hemostatic member can automatically expand to block one end of the blood storage chamber close to the push rod.

[0019] By adopting the above technical solution, the hemostatic member automatically expands to block the blood storage chamber after contacting blood, preventing the blood sample from overflowing from the push rod, realizing the quantitative collection of the blood sample, and further improving the safety and effectiveness of the blood collection needle. The automatic expansion function of the hemostatic member reduces external operation intervention, enables the device to reduce operation steps, and improves the operation simplicity and use safety.

[0020] Optionally, a first step surface is provided on the end surface of the connecting portion facing away from the abutting portion. A supporting portion adapted to the Luer interface is fixedly provided in the first step surface.

[0021] By adopting the above technical solution, the provided first step surface and supporting portion ensure that the protective cap can be firmly connected to the Luer interface, prevent loosening, and improve the safety and reliability of the operation. The firm connection method can also avoid the blood sample collected being contaminated due to the protective cap becoming loose and falling off during transportation and storage, protecting the integrity of the blood sample; at the same time, it can effectively protect the Luer interface from being damaged by external factors, thus ensuring the use of the arterial blood collection needle.

[0022] Optionally, a second step surface is provided on the end surface of the abutting portion facing away from the protective cap. A vent hole is formed through the second step surface. A sealing film is fixedly provided at one end of the abutting portion away from the vent hole.

[0023] By adopting the above technical solution, the arrangement of the air guide hole can ensure that when the protective cap opens the seal, the blood storage chamber can communicate with the external atmospheric pressure. Also, when the protective cap acts as a plug after the blood sample collection is not completed, capillary action will occur at the air guide hole, making it difficult for the blood sample to flow out from the air guide hole. Meanwhile, the sealing film provided on the abutting portion can further prevent the blood sample from leaking. In addition, when the protective cap is connected to the Luer interface, the end of the protective cap with the abutting portion is always closed, effectively preventing air and other contaminants from entering the system and ensuring the quality of the blood sample.

[0024] Optionally, a plurality of groups of anti-slip grooves are formed on the outer peripheral wall of the protective cap, and the anti-slip grooves are circumferentially distributed along the axis of the syringe barrel.

[0025] By adopting the above technical solution, the design of the anti-slip grooves can increase the grip force of the protective cap, prevent hand slippage during operation, and improve the stability and safety of the operation. The circumferential distribution design of the anti-slip grooves enables the user to firmly hold the protective cap at any angle, improving the comfort and accuracy of the operation. Especially in emergency situations, the operation can be completed more quickly and stably.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By adopting the above technical solution, the combined use of the seal and the protective cap not only endows the arterial blood collection needle with the functions of a general syringe but also adds the function of automatically drawing blood using the pressure difference, improving the blood drawing efficiency and ensuring the quality of the collected blood sample, thereby ensuring the consistency and accuracy of the blood sample and enhancing the patient experience;

[0028] 2. By adopting the above technical solution, the design of the sealing sleeve and the puncture seat enables the push rod to be completely sealed when not in use, and only by applying pressure to the sealing sleeve can the ventilation hole be quickly opened when needed. The operation is safe and simple, and it ensures the smooth movement of the blood sample in the push rod, preventing air bubbles from entering the blood sample and maintaining the integrity and accuracy of the blood sample;

[0029] 3. By adopting the above technical solution, the hemostatic member automatically expands and seals the blood storage chamber after contacting the blood, preventing the blood sample from overflowing from the push rod, achieving quantitative collection of the blood sample, and further improving the safety and effectiveness of the blood collection needle. The automatic expansion function of the hemostatic member reduces external operation intervention, simplifies the operation steps of the device, and improves the operation simplicity and use safety;

[0030] 4. By adopting the above technical solutions, the arrangement of the air guide hole can ensure that when the protective cap opens the seal, the blood storage chamber can communicate with the external atmospheric pressure. Also, when the protective cap acts as a plug after the blood sample collection is not completed, capillary action will occur at the air guide hole for the blood sample, making it difficult for the blood sample to flow out from the air guide hole. At the same time, the sealing film provided on the abutting portion can further prevent the blood sample from leaking. In addition, when the protective cap is connected to the Luer interface, the end of the protective cap with the abutting portion is always closed, effectively preventing air and other contaminants from entering the system and ensuring the quality of the blood sample. Description of the Drawings

[0031] Figure 1 is the overall structural schematic diagram of the multi-functional arterial blood gas sampling needle in the embodiment of the present application;

[0032] Figure 2 is the semi-sectional structural schematic diagram of the multi-functional arterial blood gas sampling needle in the embodiment of the present application;

[0033] Figure 3 is the partial sectional structural schematic diagram of the push rod in the embodiment of the present application;

[0034] Figure 4 is Figure 2 the enlarged schematic diagram of part A in

[0035] Reference numerals: 1, syringe; 11, injection needle; 111, installation part; 12, injection barrel; 121, Luer interface; 122, support part; 13, push rod; 131, clamping part; 132, pressing part; 14, blood storage chamber; 15, rubber stopper; 151, clamping ring groove; 152, communication hole;

[0036] 2, seal; 21, seal sleeve; 22, puncture seat; 221, puncture part; 222, ventilation hole; 23, return spring;

[0037] 3, protective cap; 31, connecting part; 311, first step surface; 32, abutting part; 321, second step surface; 33, supporting part; 34, air guide hole; 35, sealing film; 36, anti-slip groove;

[0038] 4, hemostatic part. Detailed Embodiments

[0039] The following will Figures 1-4 further elaborate on the present application in detail.

[0040] The embodiment of the present application discloses a multi-functional arterial blood gas sampling needle.

[0041] Refer to Figure 1 and Figure 2, The multi-functional arterial blood gas sampling needle includes a syringe 1, a hemostatic member 4, a sealing member 2 and a protective cap 3. The hemostatic member 4 and the sealing member 2 are both installed on the syringe 1, and the protective cap 3 is detachably installed on the syringe barrel 12.

[0042] The syringe 1 is the main tool for realizing arterial blood gas sampling; when the hemostatic member 4 encounters blood, it can automatically expand to block one end of the syringe 1. The cooperation between the hemostatic member 4 and the syringe 1 can realize the quantitative collection of blood samples; the sealing member 2 enables the syringe 1 to have both automatic blood drawing and manual blood drawing. When the sealing member 2 is open, automatic blood drawing can be achieved through the pressure difference between blood pressure and atmospheric pressure; the protective cap 3 can not only protect the interface of the syringe barrel 12 for connecting the injection needle 11, but also replace the injection needle 11 to block the syringe barrel 12 after the blood sample sampling is completed, making the syringe barrel 12 a sealed container, and it can also be used as a component to open the sealing member 2.

[0043] Refer to Figure 1 , Figure 2 and Figure 3 , The syringe 1 includes a syringe barrel 12, a push rod 13, a rubber stopper 15 and an injection needle 11. In the embodiment of the present application, both ends of the syringe barrel 12 are open. One end of the syringe barrel 12 is provided with a Luer interface 121, and the Luer interface 121 is communicated with the syringe barrel 12. The other end of the syringe barrel 12 is fixedly provided with a support portion 122.

[0044] The push rod 13 is set as a hollow rod body, and both ends of the push rod 13 are open. The edge of one end of the push rod 13 extends inward to form a clamping portion 131, and the edge of the end of the other end of the push rod 13 extends outward to form a pressing portion 132. The push rod 13 is arranged at the end of the syringe barrel 12 far from the Luer interface 121. The end of the push rod 13 with the clamping portion 131 extends into the syringe barrel 12, and the push rod 13 is slidably connected with the syringe barrel 12.

[0045] When blood sample collection is required, the push rod 13 can be pulled and slid in the syringe barrel 12, so as to form a blood storage chamber 14 for temporarily storing blood samples in the syringe barrel 12. One end of the blood storage chamber 14 is communicated with the needle through the Luer interface 121, and the other end of the blood storage chamber 14 is communicated with the push rod 13.

[0046] The rubber stopper 15 is arranged at the end of the push rod 13 with the clamping portion 131. The rubber stopper 15 is set as a cylindrical shape. A clamping ring groove 151 is opened on the outer side wall of the rubber stopper 15. The rubber stopper 15 is hermetically clamped with the clamping portion 131 through the clamping groove. A communication hole 152 is opened through one end of the rubber stopper 15. The syringe barrel 12 and the push rod 13 can be communicated through the opened communication hole 152. The outer peripheral side of the rubber stopper 15 is in sealing contact with the inner wall of the syringe barrel 12. One end of the injection needle 11 is fixedly provided with an installation portion 111, and the injection needle 11 is threadedly connected with the Luer interface 121 through the installation portion 111.

[0047] The hemostatic piece 4 is arranged at one end of the push rod 13 where the clamping portion 131 is provided. The hemostatic piece 4 is arranged in a cylindrical shape. One end of the hemostatic piece 4 is inserted into the connecting hole 152, and a gap is left between the hemostatic piece 4 and the connecting hole 152, so that when the hemostatic piece 4 does not contact the blood, the blood storage chamber 14 and the push rod 13 are in conduction. In the embodiment of the present application, the hemostatic piece 4 is made of calcium alginate. The hemostatic piece 4 will expand when it encounters blood, thereby blocking the blood storage chamber 14 close to one end of the push rod 13, so that quantitative collection of blood samples can be achieved according to actual conditions.

[0048] In addition, the hemostatic element 4 may also be made of other materials such as carboxymethyl cellulose (CMC), as long as it achieves a blocking effect of automatically expanding when encountering blood, thereby blocking the end of the push rod 13 provided with the clamping portion 131, thereby achieving automatic quantitative blood sampling.

[0049] Reference Figure 4 In the embodiment of the present application, the sealing member 2 includes a puncture seat 22, a sealing sleeve 21 and a reset spring 23. The puncture seat 22 is configured to be a disc-shaped device that matches the inner diameter of the push rod 13. The puncture seat 22 is coaxially disposed at one end of the push rod 13 where a pushing portion 132 is disposed. The puncture seat 22 is fixedly connected to the inner wall of the push rod 13. A conical puncture portion 221 is fixedly disposed at one end of the puncture seat 22 that faces the pushing portion 132. A vent hole 222 that simultaneously penetrates the puncture seat 22 and the puncture portion 221 is provided at one end of the puncture seat 22.

[0050] The sealing sleeve 21 is configured as a cylindrical rubber sleeve with one end open. The sealing sleeve 21 is sleeved on the puncture part 221. One end of the sealing sleeve 21 is fixedly connected to the puncture seat 22. The sealing sleeve 21 seals and wraps the puncture part 221. The length of the sealing sleeve 21 is slightly larger than the length of the puncture part 221. The reset spring 23 is embedded in the circumferential side wall of the sealing sleeve 21.

[0051] When the protective cap 3 is inserted into the end of the push rod 13 provided with the pushing portion 132, the end of the protective cap 3 will abut against the sealing sleeve 21, and the protective cap 3 will squeeze the sealing sleeve 21, so that the puncture portion 221 pierces the end of the sealing sleeve 21 away from the puncture seat 22, thereby connecting the blood storage chamber 14 with the external atmospheric pressure through the vent hole 222. At this time, the injection needle 11 pierces the artery, and the blood will automatically flow into the blood storage chamber 14 due to the pressure difference between the pressure in the blood vessel and the atmospheric pressure, thereby realizing automatic blood drawing;

[0052] When the protective cap 3 is pulled out from one end of the push rod 13, the sealing sleeve 21 is separated from the puncture part 221 under the action of the return spring 23. Since the sealing sleeve 21 is set as a rubber sleeve, the punctured part of the sealing sleeve 21 by the puncture part 221 can quickly return to its original state under the action of the material elasticity and self-sealing property of the rubber itself, thus re-blocking the push rod 13 and ensuring the sealing inside the blood storage chamber 14.

[0053] Also for this reason, when encountering a hypotensive patient, the efficiency of automatic blood collection will decrease. At this time, just pull out the protective cap 3 from one end of the push rod 13 to isolate the inside of the blood storage chamber 14 from the external atmospheric pressure, and the operator manually operates the push rod 13 for manual blood drawing, so as to improve the efficiency of blood sample collection.

[0054] The reason why manual blood drawing can be carried out is that in addition to the self-sealing property of the set sealing sleeve 21, when the operator operates, the fingers will grip and press the pressing part 132. At this time, the fingers will naturally block the opening at the end of the push rod 13 where the pressing part 132 is provided, so as to further seal the push rod 13 and ensure the smooth progress of manual blood drawing.

[0055] Refer to Figure 4 , in the embodiment of the present application, the protective cap 3 is set as a cylindrical shape. A plurality of groups of anti-slip grooves 36 are opened on the outer peripheral wall of the protective cap 3, and the anti-slip grooves 36 are distributed in a circle along the axis of the protective cap 3. The anti-slip grooves 36 are set as strip-shaped grooves. In other embodiments of the present application, the anti-slip grooves 36 can also be set into other shapes as long as they can play a role in increasing the friction force on the outer peripheral wall of the protective cap 3.

[0056] One end of the protective cap 3 is provided with a connecting part 31. An external thread is opened on the connecting part 31. A first stepped surface 311 is provided on the end surface of the connecting part 31 facing away from the abutting part 32. A supporting part 33 adapted to the Luer connector 121 is fixedly arranged in the first stepped surface 311. The protective cap 3 can be detachably connected to the Luer connector 121 by threading through the connecting part 31.

[0057] The other end of the protective cap 3 is provided with an abutting part 32. A second stepped surface 321 is provided on the end surface of the abutting part 32 facing away from the protective cap 3. An air guide hole 34 is penetrated and opened in the second stepped surface 321. The air guide hole 34 connects the two ends of the protective cap 3. The aperture of the air guide hole 34 is much smaller than the aperture of the Luer connector 121. A sealing film 35 is fixedly arranged at one end of the abutting part 32 away from the air guide hole 34. The protective cap 3 can also be inserted into one end of the push rod 13 provided with the pressing part 132 through the abutting part 32.

[0058] When the abutting insertion access push rod 13 is at one end provided with the pressing portion 132, the abutting portion 32 abuts against the seal 2, and the abutting portion 32 will squeeze the sealing sleeve 21, so that the puncturing portion 221 pierces the sealing sleeve 21 and the sealing film 35 at the same time, thus opening the vent hole 222 and connecting the syringe barrel 12 with the external atmospheric pressure.

[0059] The sealing film 35 can be a rubber film. In other embodiments of the present application, the sealing film 35 can also be a film made of other materials, as long as it can be pierced by the puncturing portion 221 when the protective cap 3 is inserted into one end of the push rod 13 provided with the pressing portion 132.

[0060] After the blood sample collection is completed, the protective cap 3 can also be reconnected to the Luer connector 121 at one end of the injection tube. Since the aperture of the air vent 34 is much smaller than that of the Luer connector 121, and blood is a viscous fluid with a certain surface tension, a meniscus will be formed at the air vent 34, so that the blood is not easy to flow out from the air vent 34. In addition, a sealing film 35 is also provided on the abutting portion 32 to further limit the leakage of the blood sample.

[0061] The implementation principle of the multifunctional arterial blood gas sampling needle in the embodiment of the present application is as follows: the push rod 13 is set as a hollow rod body with openings at both ends. A hemostatic member 4 is installed at one end, and a seal 2 is installed at the other end. Then, the protective cap 3 is inserted into one end of the push rod 13 to open the seal 2, so that the blood storage chamber 14 is connected to the external atmospheric pressure. The blood is automatically injected into the blood storage chamber 14 by using the pressure difference between the blood vessel and the atmospheric pressure. When the blood storage chamber 14 is filled with blood, the hemostatic member 4 contacts the blood to block one end of the blood storage chamber 14, thereby realizing the automatic quantitative collection of the blood sample; when encountering a patient with a blood vessel pressure lower than the normal level, only need to pull out the protective cap 3 from one end of the push rod 13, and then the operator can manually draw blood.

[0062] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A multifunctional arterial blood gas sampling needle, characterized in that: A syringe (1), the syringe (1) comprising an injection needle (11), a syringe barrel (12) and a push rod (13); one end of the syringe barrel (12) is provided with a Luer interface (121); the injection needle (11) is detachably connected to the syringe barrel (12) via the Luer interface (121); the push rod (13) is slidably arranged in the syringe barrel (12), and one end of the push rod (13) extends out of the syringe barrel (12); the push rod (13) is arranged as a hollow rod body with two ends open; when the push rod (13) is pulled, a blood storage chamber (14) for temporarily storing a blood sample can be formed in the syringe barrel (12); one end of the blood storage chamber (14) is communicated with the injection needle (11), and the other end of the blood storage chamber (14) is communicated with the push rod (13); a sealing member (2), the sealing member (2) being arranged at one end of the push rod (13) away from the injection cylinder (12), the sealing member (2) being fixedly connected to the inner wall of the push rod (13), the sealing member (2) being capable of blocking the push rod (13), thereby sealing one end of the push rod (13); A protective cap (3), wherein one end of the protective cap (3) is provided with a connecting portion (31), and the other end of the protective cap (3) is provided with an abutting portion (32). The protective cap (3) can be detachably connected to the Luer interface (121) by means of the connecting portion (31), and the protective cap (3) can also be inserted into an end of the push rod (13) away from the injection cylinder (12) by means of the abutting portion (32). At this time, the abutting portion (32) abuts against the sealing member (2), thereby opening the sealing member (2).

2. A multifunctional arterial blood gas sampling needle according to claim 1, characterized in that: The sealing member (2) comprises a sealing sleeve (21) and a puncture seat (22); the puncture seat (22) is coaxially fixedly arranged in the push rod (13); a puncture portion (221) is fixedly arranged at one end of the puncture seat (22) away from the injection barrel (12); and a vent (222) is opened at one end of the puncture seat (22) and penetrates both the puncture seat (22) and the puncture portion (221); the sealing sleeve (21) is sleeved on the puncture portion (221), and one end of the sealing sleeve (21) is fixedly connected to the puncture seat (22); by applying pressure to the sealing sleeve (21), the sealing sleeve (21) is punctured by the puncture portion (221), so that the vent (222) is opened.

3. A multifunctional arterial blood gas sampling needle according to claim 2, characterized in that: The sealing sleeve (21) is configured to be cylindrical and open at one end, and a return spring (23) is embedded in the sealing sleeve (21).

4. The multifunctional arterial blood gas sampling needle according to claim 1, characterized in that: A clamping portion (131) is provided at one end of the push rod (13) close to the blood storage chamber (14), and a rubber plug (15) is provided on the push rod (13). A clamping ring groove (151) is provided on the outer peripheral wall of the rubber plug (15). The rubber plug (15) is connected to the clamping portion (131) via the clamping ring groove (151). A connecting hole (152) is provided through one end of the rubber plug (15), and the syringe barrel (12), the push rod (13) and the rubber plug (15) are all sealed.

5. A multifunctional arterial blood gas sampling needle according to claim 4, characterized in that: The rubber stopper (15) is provided with a hemostatic component (4), which is cylindrical in shape. The hemostatic component (4) is inserted into the communicating hole (152), and a gap is left between the hemostatic component (4) and the communicating hole (152). The push rod (13) is connected to the blood storage chamber (14); when the hemostatic component (4) comes into contact with blood, the hemostatic component (4) can automatically expand and seal the blood storage chamber (14) near one end of the push rod (13).

6. The multifunctional arterial blood gas sampling needle according to claim 1, characterized in that: A first step surface (311) is provided on the end surface of the connecting portion (31) facing away from the abutting portion (32), and a supporting portion (33) adapted to the Luer interface (121) is fixedly disposed in the first step surface (311).

7. A multifunctional arterial blood gas sampling needle according to claim 6, characterized in that: A second step surface (321) is provided on the end surface of the abutting portion (32) facing away from the protective cap (3), an air guide hole (34) is provided through the second step surface (321), and a sealing film (35) is fixedly provided at one end of the abutting portion (32) away from the air guide hole (34).

8. The multifunctional arterial blood gas sampling needle according to claim 1, characterized in that: A plurality of groups of anti-slip grooves (36) are provided on the outer peripheral wall of the protective cap (3), and the anti-slip grooves (36) are distributed in a circular pattern along the axis of the injection barrel (12).

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