Artery blood sampling device
By designing a multi-stage telescopic protective sleeve and safety button, the problem that the needle insertion rubber block in the prior art cannot cover the entire needle, reducing the risk of infection and operation safety, realizing the complete isolation of the needle and the safety of the blood collection process.
Patent Information
- Application Number
- CN202420278174.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-05
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-02-05
AI Technical Summary
During the blood collection process of existing arterial blood collection devices, inserting rubber blocks into the needle can only block the tip of the needle and cannot cover the entire needle, resulting in a high risk of infection when touched by medical staff, and the rubber blocks are prone to fall, affecting operational safety.
An arterial blood collection device is designed, adopting a multi-stage telescopic protective sleeve, which extends out and locks through a first compression spring to wrap the needle tip and needle tube in the protective sleeve to prevent external contact, and passes through a safety button and arcuate block. Achieve safe blood collection and closed operations.
It effectively blocks the needle tip and needle tube, reduces the risk of infection, ensures safety of operation, prevents needle stabbing when removed, and achieves complete isolation of the needle after blood collection, and prevents air from entering.
Smart Images
Figure CN222217838U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to an arterial blood sampling device. Background Art
[0002] Arterial blood gas analysis is a method of evaluating the human body's respiratory function and blood acid-base balance by testing indicators such as pH value, oxygen partial pressure and carbon dioxide partial pressure in human arterial blood.
[0003] When collecting arterial blood, first remove the needle cap; then insert the needle into the blood vessel to collect blood; then insert the needle into the rubber block; then remove the needle by holding the needle; then connect the closing cover to the needle body to close the needle body. When removing the needle by holding the needle, it is necessary to prevent puncture injuries; however, hospital operating regulations stipulate that it is not allowed to hold the needle body with one hand and the needle cap with the other hand to put the needle cap back on, because such operation may also cause needlestick injuries during the process of putting the needle cap back on. Therefore, there is a step of inserting the needle into the rubber block in the above blood collection process. After the needle is inserted into the rubber block, the rubber block protects the needle to prevent the needle from puncturing medical staff.
[0004] Although the above method is widely used in hospitals, it is not without disadvantages. The needle is inserted into the rubber block, which can only block the needle tip and cannot cover the entire needle. However, when drawing blood, the needle will penetrate the human body to a certain depth, and the needle tube wall often carries germs. If medical staff accidentally touch it, there will be a risk of infection. In addition, the length of the needle inserted into the rubber block is short, and the rubber block is easy to fall off during the subsequent needle disposal process. Utility Model Content
[0005] The utility model provides an arterial blood sampling device to solve the above technical problems.
[0006] The technical solution adopted by the utility model is as follows:
[0007] An arterial blood sampling device comprises a blood sampling syringe provided with a piston and a push rod, and a sealing plug used in conjunction with the blood sampling syringe, wherein a removable end cap is provided at one end of the blood sampling syringe, a multi-stage telescopic protective sleeve is provided at one end of the end cap, a needle is installed inside the multi-stage telescopic protective sleeve; the tip of the needle extends out from the outer end of the multi-stage telescopic protective sleeve; the multi-stage telescopic protective sleeve is extended by being driven by a first compression spring, and a locking mechanism for keeping the first compression spring compressed is also provided inside the multi-stage telescopic protective sleeve; a detachably connected protective cover is provided on the outer side of the multi-stage telescopic protective sleeve.
[0008] Using the above technical solution, first prepare other materials for arterial puncture, determine the puncture site 1 to 2 cm away from the wrist crease and 0.5 to 1 cm on the outside of the arm, and process the patient's puncture site. Push the push rod to the bottom, then pull the push rod to the preset position, then remove the protective cover, and then hold the blood collection syringe like a pen, and make the needle and the artery direction 30° to 45°. Stop inserting the needle after seeing blood, so that the arterial blood is naturally collected into the blood collection syringe under the action of arterial pressure. The blood collection volume is 1 to 2 ml. While pulling out the needle, use a sterile gauze block to press the needle eye for at least 3 to 5 minutes until there is no bleeding. Then open the locking mechanism in the multi-stage telescopic protective cover with one hand to release the compression state of the first compression spring, so that the multi-stage telescopic protective cover is under the action of the first compression spring. Use the multiple protective covers inside to extend, and then isolate the needle tube and needle tip from the external environment, so as to protect the needle and avoid puncture when the needle is removed by hand later; after the isolation is completed, check whether there are bubbles mixed in the blood collection syringe, and if there are, discharge them in time; separate the multi-stage telescopic protective cover from the end through the needle disposal bucket and let the multi-stage protective cover fall naturally into the bucket, and then cover the end with a sealing plug, and shake the blood collection syringe up and down 5 times and rotate it several times to fully mix the blood and anticoagulant, then stick a label, check again and send it for inspection. Compared with the rubber block, which can only block the needle tip, but not the entire needle, this device can cover the needle tip and the needle tube together to prevent the needle tube wall with germs from being exposed to the outside world, and avoid medical staff from accidentally touching it and causing infection risks.
[0009] Preferably, the multi-stage telescopic protective sleeve comprises a storage sleeve, a needle tube protective sleeve and a needle tip protective sleeve which are sequentially sleeved; the storage sleeve is slidably connected to the needle tube protective sleeve, and the needle tube protective sleeve is slidably connected to the needle tip protective sleeve; the needle tube protective sleeve is provided with at least one; one end of the storage sleeve is connected to the end head and can be removably connected; the needle head is mounted on a mounting seat on the storage sleeve; the first compression spring is sleeved on the outside of the needle head, one end of the first compression spring is fixedly connected to the mounting seat, and the other end is fixedly connected to the needle tip protective sleeve.
[0010] By adopting the above scheme, after the locking mechanism contacts and locks, the first compression spring rebounds, driving the needle tip protection cover to slide inside the needle tube protection cover, and then the needle tip protection cover drives the needle tube protection cover to slide along the storage cover, so that the needle tip and needle tube of the needle are wrapped in the needle tube protection cover and the needle tip protection cover, realizing the protective function of the multi-stage telescopic protection cover.
[0011] Preferably, the locking mechanism includes a sliding groove arranged in the storage sleeve, a locking piece is slidably connected in the sliding groove, and the locking piece is provided with a channel for connecting the needle and the end; one end of the needle tip protection sleeve is provided with a locking groove matching the locking end of the locking piece; the pressing end of the locking piece is arranged on the outside of the storage sleeve.
[0012] By adopting the above scheme, before and during blood collection using the device, the locking end of the locking member and the locking groove are in a buckled locking state. When the blood collection is completed, the medical staff presses the pressing end of the locking member to make the locking member slide along the sliding groove, so that the locking end of the locking member is disengaged from the locking groove, thereby releasing the compression state of the first compression spring, and the first compression spring rebounds, driving the needle tip protective sleeve to slide in the needle tube protective sleeve, and then the needle tip protective sleeve drives the needle tube protective sleeve to slide along the storage sleeve, so that the needle tip and the needle tube are wrapped in the needle tube protective sleeve and the needle tip protective sleeve, realizing the protection function of the multi-stage telescopic protective sleeve. And when the locking member slides along the sliding groove, the channel on the locking member will also move, thereby cutting off the connection between the needle and the blood collection syringe, achieving the effect of sealing the blood collection syringe, and preventing external air from entering the blood collection syringe from the needle.
[0013] Preferably, a safety button is rotatably connected to the pressing end of the locking member, and the safety button cooperates with the sliding groove.
[0014] With the above solution, before and during blood collection using the device, the angle of the safety button does not match the end of the sliding slot, thereby realizing the safety function and preventing the medical staff from accidentally touching the pressing end of the locking member before the blood collection is completed, thereby releasing the compression state of the first compression spring, allowing multiple protective sleeves to extend, thereby isolating the needle tube and needle tip of the needle from the external environment, resulting in blood collection failure. After the blood collection is completed, the medical staff rotates the safety button with their fingers, and presses the safety button when the safety button matches the end of the sliding slot, causing the locking member to slide along the sliding slot, causing the locking end of the locking member to disengage from the locking slot, thereby releasing the compression state of the first compression spring.
[0015] Preferably, the safety button is provided with an arc-shaped block at one end thereof close to the sliding groove, and the outer side of the storage sleeve is provided with an arc-shaped hole matching with the arc-shaped block.
[0016] With the above scheme, before and during blood collection using the device, the safety button is tilted at a certain angle to the sliding slot and does not match the end of the sliding slot. At this time, the arc block cooperates with the arc slot. When blood collection is completed, the medical staff rotates the safety button with their fingers, and the arc block is disengaged from the arc slot. The medical staff judges by feel whether the safety button is out of the tilted state, which facilitates the alignment of the safety button with the end of the sliding slot.
[0017] Preferably, the storage sleeve and the needle tube protection sleeve are respectively provided with a receiving groove on the inner wall position away from the end head, a fitting block is slidably connected in the receiving groove, and a second compression spring is provided between the fitting block and the receiving groove; the needle tube protection sleeve and the needle tip protection sleeve are respectively provided with a fitting groove on the outer wall position close to the end head; the fitting block on the storage sleeve cooperates with the fitting groove on the needle tube protection sleeve, and the fitting block on the needle tube protection sleeve cooperates with the fitting groove on the needle tip protection sleeve.
[0018] By adopting the above scheme, after the pressing end of the locking piece is pressed, the first compression spring rebounds, driving the needle tip protection sleeve to slide inside the needle tube protection sleeve, and then the needle tip protection sleeve drives the needle tube protection sleeve to slide along the storage sleeve. When sliding into place, the fitting block is aligned with its corresponding fitting groove, and the fitting block engages with the fitting groove under the action of the rebound of the second compression spring, thereby locking the needle tip protection sleeve and the needle tube protection sleeve to prevent sliding back.
[0019] Preferably, a perforated stone is provided on the piston.
[0020] By adopting the above scheme, the pores are loose and porous, and when blood enters the blood collection syringe, the air can be pushed out from the pores of the piston; and the pores are automatically sealed when wet, isolating the air and sealing the blood sample.
[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0022] 1. Compared with the rubber block, this device can only block the needle tip, but not the entire needle. This device can block the needle tip and the needle tube together to prevent the needle tube wall with germs from being exposed to the outside world, and avoid medical staff from accidentally touching it and causing infection risks.
[0023] 2. When the locking piece slides along the sliding groove, the channel on the locking piece will also move, thereby cutting off the connection between the needle and the blood collection syringe, thereby achieving the effect of sealing the blood collection syringe and preventing external air from entering the blood collection syringe through the needle.
[0024] 3. The device is provided with a safety button to realize the safety function and prevent the medical staff from accidentally touching the pressing end of the locking part before the blood is drawn.
[0025] 4. The safety button of the device is provided with an arc block at one end close to the sliding slot, and the outer side of the storage sleeve is provided with an arc hole matching the arc block. Medical staff can judge whether the safety button is out of the tilted state by the feel of the arc block being separated from the arc slot, so as to facilitate the alignment of the safety button with the end of the sliding slot.
[0026] 5. By aligning the fitting block with the corresponding fitting groove, the fitting block engages with the fitting groove under the action of the rebound of the second compression spring, thereby locking the needle tip protection cover and the needle tube protection cover to prevent sliding back.
[0027] 6. The pores are loose and porous. When blood enters the blood collection syringe, it can push the air out from the pores of the piston; and the pores will automatically seal when they get wet, isolating the air and sealing the blood sample. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The present invention will be described by way of examples with reference to the accompanying drawings, in which:
[0029] Figure 1 This is a schematic structural diagram of an arterial blood sampling device in the utility model;
[0030] Figure 2 This is a schematic diagram of the structure of an arterial blood sampling device in the utility model when performing blood sampling;
[0031] Figure 3 It is a partial structural schematic diagram of the multi-stage telescopic protective cover during blood sampling in the utility model;
[0032] Figure 4 This is a schematic structural diagram of an arterial blood sampling device in the utility model when blood sampling is completed;
[0033] Figure 5 It is a partial structural schematic diagram of the multi-stage telescopic protective cover in the utility model when blood sampling is completed;
[0034] Figure 6 It is a schematic diagram of the structure of the blood collection syringe after the multi-stage telescopic protective cover is separated and the sealing plug is installed in the utility model;
[0035] Figure 7 This is a schematic diagram of the structure of Example 4.
[0036] Reference numerals
[0037] 1-piston, 2-push rod, 3-blood collection syringe, 4-sealing plug, 5-end, 6-needle, 7-first compression spring, 8-protective cover, 9-storage sleeve, 10-needle tube protection sleeve, 11-needle tip protection sleeve, 12-mounting seat, 13-sliding groove, 14-locking piece, 15-channel, 16-locking groove, 17-safety button, 18-arc block, 19-arc hole, 20-accommodating groove, 21-matching block, 22-matching groove, 23-closed push plate. DETAILED DESCRIPTION
[0038] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.
[0039] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0040] Combine the following Figure 1 to Figure 7 The utility model is described in detail.
[0041] Embodiment 1:
[0042] An arterial blood sampling device, in this embodiment, such as Figure 1 to Figure 6 As shown, it includes a blood collection syringe 3 provided with a piston 1 and a push rod 2, and a sealing plug 4, one end of the blood collection syringe 3 is provided with a thread, which can be matched with the sealing plug 4; the blood collection syringe 3 is provided with a scale line; one end of the blood collection syringe 3 is provided with a removable end cap 5, one end of the end cap 5 is connected to a multi-stage telescopic protective sleeve, and a needle 6 is installed inside the multi-stage telescopic protective sleeve; the tip of the needle 6 extends out from the outer end of the multi-stage telescopic protective sleeve; the multi-stage telescopic protective sleeve is driven to extend by a first compression spring 7, and a locking mechanism for keeping the first compression spring 7 pressed is also provided inside the multi-stage telescopic protective sleeve; a detachably connected protective cover 8 is provided on the outer side of the multi-stage telescopic protective sleeve.
[0043] It is worth mentioning that the blood collection needle 3 is made of high-density polyester material to reduce gas permeability.
[0044] When in use, first prepare other materials for arterial puncture, determine the puncture site 1 to 2 cm away from the wrist crease and 0.5 to 1 cm on the outside of the arm, and treat the patient's puncture site. Push the push rod 2 to the bottom, then pull the push rod 2 to the preset position, then remove the protective cover 8, and then hold the blood collection syringe 3 in a pen-like manner, and make the needle 6 30° to 45° to the direction of the artery. Stop inserting the needle after seeing blood, so that the arterial blood is naturally collected into the blood collection syringe 3 under the action of arterial pressure. The blood collection volume is 1 to 2 ml. While pulling out the needle 6, use a sterile gauze block to press the needle eye for at least 3 to 5 minutes until there is no bleeding. Then open the locking mechanism in the multi-stage telescopic protective cover with one hand to release the compression state of the first compression spring 7, so that the multi-stage telescopic protective cover is under the action of the first compression spring 7. The multiple protective covers inside are extended, and the needle tube and needle tip of the needle 6 are isolated from the external environment, so as to protect the needle 6 and avoid puncture when the needle 6 is removed by hand later; after the isolation is completed, check whether there are bubbles mixed in the blood collection syringe 3, and if there are, discharge them in time; separate the multi-stage telescopic protective cover from the end 5 through the needle 6 waste bucket and let the multi-stage protective cover fall into the bucket naturally, and then cover the end 5 with the sealing plug 4, and shake the blood collection syringe up and down 35 times and rotate it several times to make the blood and anticoagulant fully mixed, and then affix the label, check again and send it for inspection. Compared with the rubber block, which can only block the needle tip part but not the entire needle 6, this device can cover the needle tip and the needle tube together to prevent the needle tube wall with germs from being exposed to the outside world, and avoid medical staff from accidentally touching it and causing infection risks.
[0045] In this embodiment, if Figure 2 to Figure 5 As shown, the multi-stage telescopic protective sleeve includes a storage sleeve 9, a needle tube protective sleeve 10 and a needle tip protective sleeve 11 which are sequentially sleeved; the storage sleeve 9 is slidably connected to the needle tube protective sleeve 10, and the needle tube protective sleeve 10 is slidably connected to the needle tip protective sleeve 11; one end of the storage sleeve 9 is connected to the end 5 and can be removably connected; the needle 6 is fixedly mounted on the mounting seat 12 on the storage sleeve 9; the first compression spring 7 is sleeved on the outside of the needle 6, one end of the first compression spring 7 is fixedly connected to the mounting seat 12, and the other end is fixedly connected to the needle tip protective sleeve 11.
[0046] During specific use, after the locking mechanism contacts and locks, the first compression spring 7 rebounds, driving the needle tip protection cover 11 to slide inside the needle tube protection cover 10, and then the needle tip protection cover 11 drives the needle tube protection cover 10 to slide along the storage cover 9, so that the needle tip and needle tube of the needle 6 are wrapped in the needle tube protection cover 10 and the needle tip protection cover 11, realizing the protection function of the multi-stage telescopic protection cover.
[0047] In this embodiment, if Figure 3 and Figure 5As shown, the locking mechanism includes a sliding groove 13 arranged in the storage sleeve 9, a locking member 14 is slidably connected in the sliding groove 13, and the locking member 14 is provided with a channel 15 for connecting the needle 6 and the end 5; one end of the needle tip protection sleeve 11 is provided with a locking groove 16 that cooperates with the locking end of the locking member 14; the pressing end of the locking member 14 is arranged on the outside of the storage sleeve 9.
[0048] During specific use, before using the device for blood collection and during blood collection, the locking end of the locking member 14 and the locking groove 16 are in a buckled and locked state. When the blood collection is completed, the medical staff presses the pressing end of the locking member 14 to make the locking member 14 slide along the sliding groove 13, so that the locking end of the locking member 14 is disengaged from the locking groove 16, thereby releasing the compression state of the first compression spring 7. The first compression spring 7 rebounds, driving the needle tip protection cover 11 to slide in the needle tube protection cover 10, and then the needle tip protection cover 11 drives the needle tube protection cover 10 to slide along the storage cover 9, so that the needle tip and the needle tube of the needle 6 are wrapped in the needle tube protection cover 10 and the needle tip protection cover 11, thereby realizing the protection function of the multi-stage telescopic protection cover. When the locking member 14 slides along the sliding groove 13 , the channel 15 on the locking member 14 will also move, thereby cutting off the connection between the needle 6 and the blood collection syringe 3 , thereby achieving the effect of sealing the blood collection syringe 3 and preventing external air from entering the blood collection syringe 3 from the needle 6 .
[0049] In this embodiment, if Figure 3 and Figure 5 As shown, a safety button 17 is rotatably connected to the pressing end of the locking member 14 , and the safety button 17 cooperates with the sliding slot 13 .
[0050] In specific use, before and during blood collection using the device, the angle of the safety button 17 does not match the end of the sliding slot 13, thereby realizing the safety function, preventing medical personnel from accidentally touching the pressing end of the locking member 14 before the blood collection is completed, thereby releasing the compression state of the first compression spring 7, allowing multiple protective sleeves to extend, thereby isolating the needle tube and needle tip of the needle 6 from the external environment, resulting in blood collection failure. After the blood collection is completed, the medical personnel rotates the safety button 17 with their fingers, and presses the safety button 17 when the safety button 17 matches the end of the sliding slot 13, so that the locking member 14 slides along the sliding slot 13, so that the locking end of the locking member 14 is separated from the locking slot 16, thereby releasing the compression state of the first compression spring 7.
[0051] In this embodiment, if Figure 3 and Figure 5 As shown, the safety button 17 is provided with an arc block 18 at one end thereof close to the sliding slot 13 , and the outer side of the storage sleeve 9 is provided with an arc hole 19 matched with the arc block 18 .
[0052] During specific use, before using the device for blood collection and during blood collection, the safety button 17 is tilted at a certain angle to the sliding slot 13 and does not match the end of the sliding slot 13. At this time, the arc block 18 cooperates with the arc slot. When the blood collection is completed, the medical staff rotates the safety button 17 with their fingers, and the arc block 18 is disengaged from the arc slot. The medical staff judges whether the safety button 17 is out of the tilted state by feel, which facilitates the alignment of the safety button 17 with the end of the sliding slot 13.
[0053] In this embodiment, if Figure 3 and Figure 5 As shown, the storage sleeve 9 and the needle tube protection sleeve 10 are respectively provided with a receiving groove 20 on the inner wall position away from the terminal 5, and a fitting block 21 is slidably connected in the receiving groove 20, and a second compression spring is provided between the fitting block 21 and the receiving groove 20; the needle tube protection sleeve 10 and the needle tip protection sleeve 11 are respectively provided with a fitting groove 22 on the outer wall position close to the terminal 5; the fitting block 21 on the storage sleeve 9 cooperates with the fitting groove 22 on the needle tube protection sleeve 10, and the fitting block 21 on the needle tube protection sleeve 10 cooperates with the fitting groove 22 on the needle tip protection sleeve 11.
[0054] During specific use, after the pressing end of the locking piece 14 is pressed, the first compression spring 7 rebounds, driving the needle tip protection sleeve 11 to slide in the needle tube protection sleeve 10, and then the needle tip protection sleeve 11 drives the needle tube protection sleeve 10 to slide along the storage sleeve 9. When sliding into place, the fitting block 21 is aligned with its corresponding fitting groove 22, and the fitting block 21 is engaged with the fitting groove 22 under the action of the rebound of the second compression spring, thereby locking the needle tip protection sleeve 11 and the needle tube protection sleeve 10 to prevent sliding back.
[0055] In this embodiment, a perforated stone is provided on the piston 1 .
[0056] When used specifically, the pores are loose and porous, and when blood enters the blood collection syringe 3, the air can be pushed out from the pores of the piston 1; and the pores are automatically sealed when wet, isolating the air and sealing the blood sample.
[0057] Embodiment 2:
[0058] In this embodiment, unlike the above-mentioned embodiment, anti-slip grooves are provided on both sides of the safety button 17 .
[0059] Embodiment 3:
[0060] In this embodiment, different from the above-mentioned embodiments, the protective cover 8, the storage sleeve 9, the needle tube protective sleeve 10 and the needle tip protective sleeve 11 are made of transparent material to facilitate observation by medical personnel.
[0061] Embodiment 4:
[0062] like Figure 7 As shown, in this embodiment, different from the above-mentioned embodiment, a closed push plate 23 is provided between the blood collection syringe 3 and the terminal 5, and the closed push plate 23 is slidably connected to the blood collection syringe 3, and the closed push plate 23 is used to close the internal channel of the terminal 5; before the multi-stage telescopic protective cover is separated from the terminal 5 through the needle 6 disposal barrel and the multi-stage protective cover is naturally dropped into the barrel, the closed push plate 23 is first pushed into the terminal 5 to close the internal channel of the terminal 5, and then the terminal 5 is covered with a sealing plug 4, thereby achieving a double air isolation effect, further improving the practicability of the device.
[0063] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.
Claims
1. An arterial blood sampling device, comprising a blood sampling syringe (3) provided with a piston (1) and a push rod (2), and a sealing plug (4) used in conjunction with the blood sampling syringe (3), characterized in that: A removable end cap (5) is provided at one end of the blood collection syringe (3), and a multi-stage telescopic protective sleeve is provided at one end of the end cap (5), and a needle (6) is installed inside the multi-stage telescopic protective sleeve; the tip of the needle (6) extends out from the outer end of the multi-stage telescopic protective sleeve; the multi-stage telescopic protective sleeve is extended by a first compression spring (7), and a locking mechanism for keeping the first compression spring (7) pressed is also provided inside the multi-stage telescopic protective sleeve; a detachably connected protective cover (8) is provided on the outer side of the multi-stage telescopic protective sleeve.
2. An arterial blood sampling device according to claim 1, characterized in that: The multi-stage telescopic protective sleeve comprises a storage sleeve (9), a needle tube protective sleeve (10) and a needle tip protective sleeve (11) which are sequentially sleeved; the storage sleeve (9) is slidably connected to the needle tube protective sleeve (10), and the needle tube protective sleeve (10) is slidably connected to the needle tip protective sleeve (11); the needle tube protective sleeve (10) is provided with at least one; one end of the storage sleeve (9) is connected to the end head (5) and can be removably connected; the needle head (6) is mounted on a mounting seat (12) on the storage sleeve (9); the first compression spring (7) is sleeved on the outside of the needle head (6), one end of the first compression spring (7) is fixedly connected to the mounting seat (12), and the other end is fixedly connected to the needle tip protective sleeve (11).
3. An arterial blood sampling device according to claim 2, characterized in that: The locking mechanism comprises a sliding groove (13) arranged in the storage sleeve (9), a locking member (14) is slidably connected in the sliding groove (13), and the locking member (14) is provided with a channel (15) for connecting the needle (6) and the end (5); one end of the needle tip protection sleeve (11) is provided with a locking groove (16) matching with the locking end of the locking member (14); the pressing end of the locking member (14) is arranged on the outside of the storage sleeve (9).
4. An arterial blood sampling device according to claim 3, characterized in that: A safety button (17) is rotatably connected to the pressing end of the locking member (14), and the safety button (17) cooperates with the sliding groove (13).
5. An arterial blood sampling device according to claim 4, characterized in that: The safety button (17) is provided with an arc block (18) at one end thereof close to the sliding groove (13), and the outer side of the storage sleeve (9) is provided with an arc hole (19) matching with the arc block (18).
6. An arterial blood sampling device according to claim 2, characterized in that: The storage sleeve (9) and the needle tube protection sleeve (10) are respectively provided with a receiving groove (20) at an inner wall position away from the terminal (5), and a fitting block (21) is slidably connected in the receiving groove (20), and a second compression spring is provided between the fitting block (21) and the receiving groove (20); the needle tube protection sleeve (10) and the needle tip protection sleeve (11) are respectively provided with a fitting groove (22) at an outer wall position close to the terminal (5); the fitting block (21) on the storage sleeve (9) cooperates with the fitting groove (22) on the needle tube protection sleeve (10), and the fitting block (21) on the needle tube protection sleeve (10) cooperates with the fitting groove (22) on the needle tip protection sleeve (11).
7. An arterial blood sampling device according to any one of claims 1 to 6, characterized in that: The piston (1) is provided with a perforated stone.