Needle-stick-injury-preventing connectable arterial duct blood collector

Abstract

The utility model relates to the technical field of medical instruments, in particular to a connectable arterial duct hemostix capable of preventing needle stick injury, which comprises a blood collection tube, a first joint and a reagent tube, the first connector comprises a first connector part and a second connector part, the first connector comprises a shielding piece, the second connector part comprises a needle head, and a first elastic piece is connected between the first connector part and the second connector part; the reagent tube comprises a reagent tube body and a tube accessory, and a second elastic piece is connected between the reagent tube body and the tube accessory; when the first connector is in an initial state, external force is applied to the reagent tube, so that the reagent tube body abuts against the first connector part, and the tube accessory abuts against the second connector part. After the external force is relieved, the pipe accessory drives the second connector part to move relative to the first connector part, and the needle penetrates through the shielding part and then penetrates into the reagent pipe body. According to the connectable arterial duct blood collector capable of preventing the needle injury, the needle injury risk of medical staff can be reduced when a needle head is frequently punctured to a reagent tube, and the occupational exposure risk of the medical staff is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a blood sampling device which can be connected to an arterial catheter and can prevent needle punctures. Background Art

[0002] Currently, in clinical practice, arterial catheters are usually used in intensive care units to monitor patient blood pressure, and blood can be collected from arterial catheters. Currently, blood collection from critically ill patients is usually performed by drawing blood from the arterial catheter using a syringe, and then the blood in the syringe is injected into each reagent tube.

[0003] Although the current blood collection method can improve the convenience of blood collection for critically ill patients, the inventors found in the actual operation that the current blood collection method still has shortcomings, specifically:

[0004] In the process of injecting the blood in the syringe into each reagent tube, it is usually necessary to pierce the needle on the syringe into each reagent tube in turn so as to inject blood into each reagent tube. However, since the needle of the syringe is exposed, the risk of needlestick injury to medical staff increases when the needle is frequently pierced into the reagent tube, thereby increasing the risk of occupational exposure of medical staff.

[0005] Therefore, how to reduce the risk of needlestick injuries suffered by medical staff during the blood collection process is an issue that urgently needs to be addressed. Utility Model Content

[0006] The purpose of the utility model is to provide a needlestick-proof blood sampling device that can be connected to an arterial catheter to reduce the risk of needlestick injuries to medical staff during the blood sampling process, in view of the current problem that the risk of needlestick injuries to medical staff is easily increased when blood is collected from critically ill patients.

[0007] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0008] A needle-stick-proof blood collector connectable to an arterial catheter comprises a blood collection tube, a first connector and a reagent tube, wherein the blood collection tube is connected to the first connector, and the reagent tube is detachably connected to the first connector;

[0009] The first connector includes a connector part and a connector part two, the first connector includes a shielding member, the connector part two includes a needle, a first elastic member is connected between the connector part one and the connector part two, the first elastic member is elastic, and the first elastic member provides elastic force to make the first connector have an initial state. When the first connector is in the initial state, the first connector is separated from the reagent tube, and the shielding member shields the needle;

[0010] The reagent tube comprises a reagent tube body and a tube auxiliary part, a second elastic part is connected between the reagent tube body and the tube auxiliary part, the second elastic part is elastic, and the second elastic part provides elastic force to make the reagent tube have an initial state;

[0011] When the first connector is in the initial state, applying an external force to the reagent tube can cause the reagent tube body to resist the first part of the connector, and the tube auxiliary part to resist the second part of the connector. At this time, the reagent tube is released from the initial state, and the deformation of the second elastic part increases; after the external force is released, the second elastic part gradually recovers its deformation, the reagent tube body and the first part of the connector are relatively still, and the tube auxiliary part drives the second part of the connector to move relative to the first part of the connector, so that the deformation of the first elastic part increases, and the needle pierces the shielding member and then penetrates into the reagent tube body, so that the blood collection blood tube, the needle and the reagent tube body are in a connected state.

[0012] As a preferred technical solution of the present application, when the first connector is in an initial state, the needle does not penetrate into the shielding member.

[0013] As a preferred technical solution of the present application, the shielding member is elastic. When the needle penetrates into the shielding member, the shielding member forms an insertion channel for accommodating the needle. When the needle does not penetrate into the shielding member, the shielding member closes the insertion channel under the action of its own elasticity.

[0014] As a preferred technical solution of the present application, the portion of the needle used for piercing the reagent tube body is sharp.

[0015] As a preferred technical solution of the present application, the pipe auxiliary part includes a first abutment portion, and the joint part includes a second abutment portion. The first abutment portion is used to abut against the second abutment portion. By rotating the pipe auxiliary part around its own central axis relative to the joint part, the first abutment portion and the second abutment portion can be in a mating state or a misaligned state.

[0016] As the priority technical solution of the present application, the tube auxiliary part is sleeved on the outer wall of the reagent tube body, and the tube auxiliary part can move relative to the reagent tube body along the length direction of the reagent tube body. When the tube auxiliary part moves relative to the reagent tube body in the length direction of the reagent tube body, the deformation amount of the second elastic part changes.

[0017] As a preferred technical solution of the present application, when the reagent tube is matched with the first connector and the blood collection tube, the needle and the reagent tube body are in a connected state, in the process of applying a force from the first connector to the reagent tube direction to the tube auxiliary part or the reagent tube body, the force acting against each other between the tube auxiliary part and the connector increases, and the degree to which the needle penetrates the reagent tube body increases or remains the same.

[0018] As a preferred technical solution of the present application, a groove is provided on the first abutting portion, and the groove is used to cooperate with the second abutting portion, so that when the first abutting portion abuts against the second abutting portion, the second abutting portion is stuck in the groove, thereby limiting the rotation of the pipe auxiliary part around its own central axis relative to the two parts of the joint.

[0019] As a preferred technical solution of the present application, the second part of the connector also includes a sleeve, a matching groove is formed on the first part of the connector, the sleeve cooperates with the matching groove, the sleeve and the matching groove cooperate to form a accommodating space, the accommodating space is connected to the needle and the blood collection tube, and when the second part of the connector moves relative to the first part of the connector so that the needle gradually penetrates the shielding member, the sleeve moves relative to the matching groove so that the volume of the accommodating space gradually increases.

[0020] As a preferred technical solution of the present application, it also includes a second connector, which is connected to the blood collection tube. The second connector is used to cooperate with the arterial catheter to connect the arterial catheter with the blood collection tube.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] 1. In the scheme of the present application, when the reagent tube and the first connector are in a separated state, the first connector is in an initial state. At this time, the shielding member shields the needle so that the needle does not extend from the shielding member, thereby reducing the risk of needlestick injuries to medical staff; further, in the process of connecting the reagent tube to the first connector, an external force is applied to the reagent tube so that the reagent tube body and the first connector are abutted against each other, and the tube auxiliary member and the second connector are abutted against each other. After the external force is released, the second elastic member gradually restores its deformation, so that the tube auxiliary member drives the second connector to move relative to the first connector, so that the needle pierces the shielding member and then penetrates into the reagent tube body, so that the blood collection tube, the needle and the reagent tube body are in a connected state. In this way, in the process of the needle extending from the shielding member, the first connector The second elastic member provides elastic force to push the second part of the connector, and the reagent tube body and the first part of the connector are relatively still, so that the medical staff no longer need to manually push the needle to move. At the same time, the reagent tube body can protect the needle extending from the shielding member to prevent the medical staff from directly contacting the needle. On the one hand, it improves the convenience of the needle piercing the reagent tube body, and on the other hand, it further reduces the risk of needlestick injuries to the medical staff; at the same time, after the reagent tube is separated from the first connector, its first elastic member restores its deformation, so that the first connector returns to its initial state, thereby further reducing the risk of needlestick injuries to the medical staff; thus, in the process of frequently piercing the needle into the reagent tube, the risk of needlestick injuries to the medical staff can be further reduced, and the occupational exposure risk of the medical staff can be reduced;

[0023] 2. Furthermore, the shielding member is made elastic. When the first needle is in the initial state and the needle has not penetrated into the shielding member, the shielding member closes the penetration channel under the action of its own elasticity, which can reduce the probability of liquid leaking into the external environment through the shielding member and reduce the pollution of the environment by blood. At the same time, the elastic shielding member also facilitates the penetration of the needle.

[0024] 3. Furthermore, by providing a groove on the first abutting portion, when the first abutting portion and the second abutting portion abut against each other, the second abutting portion can be stuck in the groove, thereby limiting the rotation of the tube auxiliary part around its own central axis relative to the two joint parts, thereby improving the stability of the abutment between the first abutting portion and the second abutting portion, and further improving the stability of the connection between the reagent tube and the first joint. At the same time, in the process of the reagent tube and the first joint changing from a connected state to a separated state, by applying a force toward the first joint to the tube auxiliary part, the direct abutment effect between the first abutting portion and the second abutting portion is reduced. During this process, the second abutting portion gradually disengages from the groove. After the second abutting portion is disengaged from the groove, by rotating the tube auxiliary part around its own central axis relative to the two joint parts, the first abutting portion and the second abutting portion are in a dislocated state, and then a force is applied to the reagent tube from the first joint to the direction of the reagent tube, thereby separating the reagent tube from the first joint. In this way, while improving the stability of the connection between the reagent tube and the first joint, the convenience of separating the reagent tube from the first joint is ensured.

[0025] 4. Furthermore, by providing a sleeve and a matching groove so that the sleeve and the matching groove cooperate to form a accommodating space, in the process of injecting blood into multiple reagent tubes, after completing the blood injection into the previous reagent tube, after the first connector is separated from the reagent tube collecting the blood, the needle is retracted to be covered by the shielding member. At this time, there is blood in the needle and the volume of its accommodating space is relatively small. Then, in the process of connecting the new reagent tube to the first connector, as the needle gradually penetrates the shielding member, the volume of the accommodating space gradually increases, making it easy for the blood in the needle to flow toward the direction of the accommodating space, thereby reducing the risk of blood escaping from the needle during the process of connecting the new reagent tube to the first connector and before the needle penetrates the interior of the reagent tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of one embodiment of a puncture-proof blood sampling device connectable to an arterial catheter in the present application;

[0027] Figure 2 This is a schematic diagram of a partial structure of a blood sampling device that can be connected to an arterial catheter and is puncture-proof in one embodiment of the present application, when the needle does not pierce the shielding member;

[0028] Figure 3This is a schematic structural diagram of a puncture-proof arterial catheter-connectable blood sampling device in one embodiment of the present application, when a reagent tube is separated from the first connector;

[0029] Figure 4 This is a schematic structural diagram of a reagent tube in one embodiment of a puncture-proof arterial catheter connectable blood sampling device of the present application when it is connected to a first connector;

[0030] Figure 5 This is a schematic structural diagram of a puncture-proof arterial catheter-connectable blood sampling device in one embodiment of the present application, when a reagent tube is connected to a first connector at a shielding member;

[0031] Figure 6 This is a schematic diagram of the structure of a reagent tube in one embodiment of a puncture-proof blood sampling device connectable to an arterial catheter of the present application;

[0032] Figure 7 This is a schematic structural diagram of another perspective of a reagent tube in one embodiment of a puncture-proof blood sampling device connectable to an arterial catheter of the present application;

[0033] Markings in the figure: 1-blood collection tube, 2-first connector, 3-reagent tube, 4-connector part one, 5-connector part two, 6-shielding member, 7-needle, 8-first elastic member, 9-reagent tube body, 10-tube auxiliary member, 11-second elastic member, 12-first abutting portion, 13-second abutting portion, 14-groove, 15-sleeve, 16-matching groove, 17-accommodating space, 18-second connector. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0035] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model 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 utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] Embodiment 1: This embodiment provides a needle-stick-proof blood sampling device that can be connected to an arterial catheter, see Figure 1-Figure 7 As shown, it includes a blood collection tube 1, a first connector 2 and a reagent tube 3, wherein the blood collection tube 1 is connected to the first connector 2, and the reagent tube 3 is detachably connected to the first connector 2;

[0040] The first connector 2 includes a connector part 4 and a connector part 5, the first connector 2 includes a shielding member 6, the connector part 5 includes a needle 7, a first elastic member 8 is connected between the connector part 4 and the connector part 5, the first elastic member 8 is elastic, and the first elastic member 8 provides elastic force to make the first connector 2 have an initial state. When the first connector 2 is in the initial state, the first connector 2 is separated from the reagent tube 3, and the shielding member 6 shields the needle 7;

[0041] The reagent tube 3 includes a reagent tube body 9 and a tube auxiliary part 10, and a second elastic part 11 is connected between the reagent tube body 9 and the tube auxiliary part 10. The second elastic part 11 is elastic and provides elastic force to make the reagent tube 3 have an initial state;

[0042] When the first connector 2 is in the initial state, applying an external force to the reagent tube 3 can cause the reagent tube body 9 to abut against the connector part 4, and the tube auxiliary part 10 to abut against the connector part 5. At this time, the reagent tube 3 is released from the initial state, and the deformation of the second elastic member 11 increases; after the external force is released, the second elastic member 11 gradually recovers its deformation, the reagent tube body 9 and the connector part 4 are relatively still, and the tube auxiliary part 10 drives the connector part 5 to move relative to the connector part 4, so that the deformation of the first elastic member 8 increases, and the needle 7 pierces the shielding member 6 and then penetrates into the reagent tube body 9, so that the blood collection tube 1, the needle 7 and the reagent tube body 9 are in a connected state.

[0043] In the present application, when the reagent tube 3 and the first connector 2 are in a separated state, the first connector 2 is in an initial state. At this time, the shielding member 6 shields the needle 7, so that the needle 7 does not extend from the shielding member 6, thereby reducing the risk of needlestick injuries to medical staff; further, in the process of connecting the reagent tube 3 with the first connector 2, an external force is applied to the reagent tube 3 to make the reagent tube body 9 and the connector part 4 abut against each other, and the tube auxiliary member 10 and the connector part 5 abut against each other. After the external force is released, the second elastic member 11 gradually restores its deformation, so that the tube auxiliary member 10 drives the connector part 5 to move relative to the connector part 4, so that the needle 7 pierces the shielding member 6 and then penetrates into the reagent tube body 9, so that the blood collection tube 1, the needle 7 and the reagent tube body 9 are in a connected state. In this way, when the needle 7 extends from the shielding member 6, During the process, the second elastic member 11 provides elastic force to push the second connector part 5, and the reagent tube body 9 and the first connector part 4 are relatively stationary, so that the medical staff no longer need to manually push the needle 7 to move. At the same time, the reagent tube body 9 can protect the needle 7 extending from the shielding member 6 to prevent the medical staff from directly contacting the needle 7. On the one hand, it improves the convenience of the needle 7 piercing the reagent tube body 9, and on the other hand, it further reduces the risk of needlestick injuries to the medical staff; at the same time, after the reagent tube 3 is separated from the first connector 2, its first elastic member 8 recovers its deformation, so that the first connector 2 returns to its initial state, thereby further reducing the risk of needlestick injuries to the medical staff; thus, in the process of frequently piercing the needle 7 into the reagent tube 3, the risk of needlestick injuries to the medical staff can be further reduced, and the occupational exposure risk of the medical staff can be reduced.

[0044] As a preferred implementation, based on the above implementation, further, when the first connector 2 is in the initial state, the needle 7 does not penetrate into the shielding member 6 .

[0045] As a preferred embodiment, on the basis of the above-mentioned manner, further, the shielding member 6 is elastic. When the needle 7 penetrates into the shielding member 6, the shielding member 6 forms an insertion channel for accommodating the needle 7. When the needle 7 does not penetrate into the shielding member 6, the shielding member 6 closes the insertion channel under the action of its own elasticity.

[0046] Furthermore, the shielding member 6 is made elastic. When the first needle 7 is in the initial state, the needle 7 has not penetrated the shielding member 6. The shielding member 6 closes the penetration channel under the action of its own elasticity, which can reduce the probability of liquid seeping into the external environment through the shielding member 6 and reduce the pollution of the environment by blood. At the same time, the elastic shielding member 6 also facilitates the penetration of the needle 7.

[0047] As a preferred embodiment, on the basis of the above-mentioned embodiment, further, the portion of the needle 7 for piercing the reagent tube body 9 is sharp.

[0048] Furthermore, the portion of the needle 7 for piercing the reagent tube body 9 is sharpened, thereby improving the convenience of the needle 7 piercing the shielding member 6 or the reagent tube body 9.

[0049] Embodiment 2: Based on the technical solution of embodiment 1, further, see Figure 1-Figure 7 As shown, the pipe auxiliary component 10 includes a first abutment portion 12, and the joint part 5 includes a second abutment portion 13. The first abutment portion 12 is used to abut against the second abutment portion 13. By rotating the pipe auxiliary component 10 around its own central axis relative to the joint part 5, the first abutment portion 12 and the second abutment portion 13 can be in a mating state or a misaligned state.

[0050] Furthermore, by providing the first abutment portion 12 and the second abutment portion 13, when the first abutment portion 12 and the second abutment portion 13 are in a misaligned state, the second abutment portion 13 will not hinder the movement of the first abutment portion 12, thereby facilitating the abutment between the reagent tube body 9 and the first joint 2 when an external force is applied to the reagent tube 3. After the reagent tube body 9 and the first joint 2 abut, the tube auxiliary component 10 can be rotated relative to the second joint part 5 around its own central axis to transform the first abutment portion 12 and the second abutment portion 13 from the misaligned state to the mating state. When it is in the mating state, the tube auxiliary component 10 abuts against the second joint part 5, thereby improving the convenience of the abutment between the reagent tube body 9 and the first joint 2 and the abutment between the tube auxiliary component 10 and the second joint part 5.

[0051] As a preferred embodiment, on the basis of the above method, further, the tube auxiliary part 10 is sleeved on the outer wall of the reagent tube body 9, and the tube auxiliary part 10 can move relative to the reagent tube body 9 along the length direction of the reagent tube body 9. When the tube auxiliary part 10 moves relative to the reagent tube body 9 along the length direction of the reagent tube body 9, the deformation amount of the second elastic part 11 changes.

[0052] Furthermore, the tube auxiliary part 10 is sleeved on the outer wall of the reagent tube body 9, and the tube auxiliary part 10 can move relative to the reagent tube body 9 along the length direction of the reagent tube 3. In the process of connecting the reagent tube 3 with the first joint 2, by applying force along the length direction of the reagent tube body 9 to the tube auxiliary part, it is convenient to make the reagent tube body 9 and the first joint 2 abut against each other, and it is also convenient to make the tube auxiliary part 10 and the second joint part 5 abut against each other subsequently, thereby improving the convenience of connecting the reagent tube 3 with the first joint 2.

[0053] As a preferred embodiment, on the basis of the above-mentioned method, further, when the reagent tube 3 is matched with the first connector 2, and the blood collection tube 1, the needle 7 and the reagent tube body 9 are in a connected state, in the process of applying a force from the first connector 2 to the reagent tube 3 to the tube auxiliary part 10 or the reagent tube body 9, the force acting against the second part 5 of the tube auxiliary part 10 increases, and the degree of penetration of the needle 7 into the reagent tube body 9 increases or remains the same.

[0054] Furthermore, when the blood collection needle, the needle 7 and the reagent tube body 9 are in a connected state, in the process of applying a force from the first connector 2 to the reagent tube 3 to the tube auxiliary part 10 or the reagent tube body 9, the force acting against the second part 5 of the tube auxiliary part increases, and the degree to which the needle 7 penetrates into the reagent tube body 9 increases or remains the same, thereby further improving the stability of the connection between the reagent tube 3 and the first connector 2 and further improving the stability of the needle 7 penetrating into the reagent tube body 9.

[0055] As a preferred embodiment, on the basis of the above method, further, a groove 14 is provided on the first abutting portion 12, and the groove 14 is used to cooperate with the second abutting portion 13, so that when the first abutting portion 12 abuts against the second abutting portion 13, the second abutting portion 13 is stuck in the groove 14, thereby limiting the rotation of the pipe auxiliary part 10 around its own central axis relative to the second joint part 5.

[0056] Furthermore, by providing a groove 14 on the first abutting portion 12, when the first abutting portion 12 and the second abutting portion 13 abut against each other, the second abutting portion 13 can be stuck in the groove 14, thereby limiting the rotation of the tube auxiliary component around its own central axis relative to the second joint portion 5, thereby improving the stability of the abutment between the first abutting portion 12 and the second abutting portion 13, and further improving the stability of the connection between the reagent tube 3 and the first joint 2. At the same time, in the process of the reagent tube 3 and the first joint 2 changing from a connected state to a separated state, by applying a force toward the first joint 2 to the tube auxiliary component 10, the first abutting portion 12 and the first joint 2 are The direct abutment effect of the second abutment portion 13 is reduced, and during this process, the second abutment portion 13 gradually disengages from the groove 14. After the second abutment portion 13 disengages from the groove 14, the first abutment portion 12 and the second abutment portion 13 are in a dislocated state by rotating the tube auxiliary part 10 around its own central axis relative to the second joint part 5, and then a force is applied to the reagent tube 3 from the first joint 2 in the direction of the reagent tube 3, so that the reagent tube 3 is separated from the first joint 2. In this way, while improving the stability of the connection between the reagent tube 3 and the first joint 2, the convenience of separating the reagent tube 3 from the first joint 2 is ensured.

[0057] Embodiment 3: Based on the technical solution of Embodiment 2, further, see Figure 1-Figure 6As shown, the second connector part 5 also includes a sleeve 15, and a matching groove 16 is formed on the first connector part 4. The sleeve 15 matches with the matching groove 16, and the sleeve 15 and the matching groove 16 match to form a accommodating space 17. The accommodating space 17 is connected to the needle 7 and the blood collection tube 1. When the second connector part 5 moves relative to the first connector part 4 and the needle 7 gradually penetrates the shielding member 6, the sleeve 15 moves relative to the matching groove 16, so that the volume of the accommodating space 17 gradually increases.

[0058] Furthermore, by providing the sleeve 15 and the matching groove 16, the sleeve 15 and the matching groove 16 cooperate to form a accommodating space 17. During the process of injecting blood into multiple reagent tubes 3, after completing the blood injection into the previous reagent tube 3, after the first connector 2 is separated from the reagent tube 3 collecting the blood, the needle 7 is retracted to be covered by the shielding member 6. At this time, there is blood in the needle 7, and the volume of the accommodating space 17 is relatively small. Then, during the process of connecting a new reagent tube 3 to the first connector 2, as the needle 7 gradually penetrates the shielding member 6, the volume of the accommodating space 17 gradually increases, so that the blood in the needle 7 is easy to flow toward the direction of the accommodating space 17, thereby reducing the risk of blood escaping from the needle 7 during the process of connecting a new reagent tube 3 to the first connector 2 and before the needle 7 penetrates the inside of the reagent tube body 9.

[0059] As a preferred embodiment, based on the above method, it further includes a second connector 18, which is connected to the blood collection tube 1, and is used to cooperate with the arterial catheter to connect the arterial catheter with the blood collection tube 1.

[0060] Furthermore, by providing a second connector 18, the connection between the arterial catheter blood collector connectable to the arterial catheter of the present application is facilitated, thereby improving the convenience of connection. Furthermore, the second connector 18 can be a positive pressure connector, which is connected to the three-way connector on the arterial catheter. The specific connection method of the positive pressure connector is a prior art, so it will not be repeated here.

[0061] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A needle-stick-proof blood sampling device connectable to an arterial catheter, characterized in that: It includes a blood collection tube, a first connector and a reagent tube, wherein the blood collection tube is connected to the first connector, and the reagent tube is detachably connected to the first connector; The first connector includes a connector part and a connector part two, the first connector includes a shielding member, the connector part two includes a needle, a first elastic member is connected between the connector part one and the connector part two, the first elastic member is elastic, and the first elastic member provides elastic force to make the first connector have an initial state. When the first connector is in the initial state, the first connector is separated from the reagent tube, and the shielding member shields the needle; The reagent tube comprises a reagent tube body and a tube auxiliary part, a second elastic part is connected between the reagent tube body and the tube auxiliary part, the second elastic part is elastic, and the second elastic part provides elastic force to make the reagent tube have an initial state; When the first connector is in the initial state, applying an external force to the reagent tube can cause the reagent tube body to resist the first part of the connector, and the tube auxiliary part to resist the second part of the connector. At this time, the reagent tube is released from the initial state, and the deformation of the second elastic part increases; after the external force is released, the second elastic part gradually recovers its deformation, the reagent tube body and the first part of the connector are relatively still, and the tube auxiliary part drives the second part of the connector to move relative to the first part of the connector, so that the deformation of the first elastic part increases, and the needle pierces the shielding member and then penetrates into the reagent tube body, so that the blood collection blood tube, the needle and the reagent tube body are in a connected state.

2. The needle-stick-proof blood sampling device connectable to an arterial catheter as claimed in claim 1, characterized in that: When the first connector is in an initial state, the needle does not penetrate into the shielding member.

3. The needle-stick-proof blood sampling device connectable to an arterial catheter as claimed in claim 2, characterized in that: The shielding member is elastic. When the needle pierces the shielding member, the shielding member forms a piercing channel for accommodating the needle. When the needle does not pierce the shielding member, the shielding member closes the piercing channel under the action of its own elasticity.

4. The needle-stick-proof blood sampling device connectable to an arterial catheter as claimed in claim 3, characterized in that: The portion of the needle used for piercing the reagent tube body is sharp.

5. The needle-stick-proof blood sampling device connectable to an arterial catheter as claimed in claim 4, characterized in that: The pipe auxiliary part includes a first abutment part, and the joint part includes a second abutment part. The first abutment part is used to abut against the second abutment part. By rotating the pipe auxiliary part around its own central axis relative to the joint part, the first abutment part and the second abutment part can be in a mating state or a misaligned state.

6. The needle-stick-proof blood sampling device connectable to an arterial catheter as claimed in claim 5, characterized in that: The tube auxiliary part is sleeved on the outer wall of the reagent tube body, and the tube auxiliary part can move relative to the reagent tube body along the length direction of the reagent tube body. When the tube auxiliary part moves relative to the reagent tube body in the length direction of the reagent tube body, the deformation amount of the second elastic part changes.

7. The needle-stick-proof blood sampling device connectable to an arterial catheter as claimed in claim 6, characterized in that: When the reagent tube is matched with the first connector, and the blood collection tube, the needle and the reagent tube body are in a connected state, in the process of applying a force from the first connector to the reagent tube body, the force acting against each other between the tube auxiliary part and the connector increases, and the degree to which the needle penetrates the reagent tube body increases or remains the same.

8. The needle-stick-proof blood sampling device connectable to an arterial catheter as claimed in claim 7, characterized in that: The first abutting portion is provided with a groove, and the groove is used to cooperate with the second abutting portion, so that when the first abutting portion and the second abutting portion abut against each other, the second abutting portion is stuck in the groove, thereby limiting the rotation of the pipe auxiliary part around its own central axis relative to the two parts of the joint.

9. The needle-stick-proof blood sampling device connectable to an arterial catheter as claimed in claim 8, characterized in that: The second part of the connector also includes a sleeve, and a matching groove is formed on the first part of the connector. The sleeve matches the matching groove, and the sleeve and the matching groove match to form a accommodating space. The accommodating space is connected to the needle and the blood collection tube. When the second part of the connector moves relative to the first part of the connector and the needle gradually penetrates the shielding member, the sleeve moves relative to the matching groove, so that the volume of the accommodating space gradually increases.

10. The needle-stick-proof blood sampling device connectable to an arterial catheter as claimed in claim 9, characterized in that: It also includes a second connector, which is connected to the blood collection tube and is used to cooperate with the arterial catheter to connect the arterial catheter with the blood collection tube.

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