Safe arterial hemostix

Abstract

The invention provides a safe arterial hemostix which comprises a needle cylinder, one end of the needle cylinder is connected with a needle head through a flow stopping part, a protection sleeve is arranged on a needle point of the needle head, and the protection sleeve can be arranged on the outer ring of the needle head in a sleeving mode; the flow stopping part comprises a fixed end and a movable end, the fixed end is connected with the needle cylinder, the movable end is connected with a base of the needle head, a one-way valve is arranged in the fixed end, and the flow direction of the one-way valve is from the needle head to the needle cylinder; an ejector rod is arranged in the movable end and can open a valve element of the one-way valve. The fixed end and the movable end are adopted to form the flow stopping part, the ejector rod is arranged in the movable end, the one-way valve is arranged in the fixed end, the ejector rod opens a valve element of the one-way valve, a blood sample is extracted into the needle cylinder through movement of the piston in the needle cylinder, and after the blood sample is extracted, the movable end is far away from the fixed end, and the valve element of the one-way valve is reset under the action of the spring. The end, close to the needle head, of the needle cylinder is closed, and it can be guaranteed that the blood sample in the needle cylinder cannot be polluted.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a safe arterial blood sampling device. Background Art

[0002] Arterial blood sampling is a common medical procedure used to extract arterial blood samples for blood gas analysis, etc. The traditional arterial blood sampling method has the following technical defects: the needle may accidentally stab medical staff, and the blood sample may be contaminated.

[0003] Therefore, how to design a safe arterial blood sampling device has become an urgent problem to be solved. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a safe arterial blood sampling device to solve at least one of the above technical problems.

[0005] The technical solution of the present invention is: a safe arterial blood collector, including a syringe, one end of which is connected to a needle through a flow-stopping part, a protective sleeve is arranged on the needle tip, and the protective sleeve can be arranged on the outer circle of the needle; the flow-stopping part includes a fixed end and a movable end, the fixed end is connected to the syringe, the movable end is connected to the base of the needle, a one-way valve is arranged in the fixed end, and the flow direction of the one-way valve is from the needle to the syringe; a push rod is arranged in the movable end, and the push rod can open the valve core of the one-way valve.

[0006] The present invention adopts a fixed end and a movable end to form a flow stop part, a push rod is arranged in the movable end, and a one-way valve is arranged in the fixed end. The push rod opens the valve core of the one-way valve, and the blood sample is drawn into the syringe through the movement of the piston in the syringe. After the blood sample is drawn, the movable end is away from the fixed end, and the valve core of the one-way valve is reset under the action of a spring to close the end of the syringe close to the needle, thereby ensuring that the blood sample in the syringe will not be contaminated; a protective cover is arranged on the needle tip of the needle, and the protective cover can be mounted on the outer circle of the needle, thereby solving the technical defect that the needle may accidentally injure medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the installation structure of the present invention.

[0008] Figure 2 for Figure 1 A partial enlarged view of .

[0009] In the figure: 1. syringe; 2. needle; 3. protective cover; 4. flow stop; 5. one-way valve; 6. push rod; 401. fixed end; 402. movable end. DETAILED DESCRIPTION

[0010] The present invention will be further described below in conjunction with the accompanying drawings.

[0011] See also Figure 1-2 The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0012] Embodiment 1: A safe arterial blood sampling device, referring to Figure 1 , Figure 2 , comprising a syringe 1, one end of which is connected to a needle 2 via a stopper 4, a protective sleeve 3 being arranged on the needle tip of the needle 2, and the protective sleeve 3 being able to be sleeved on the outer ring of the needle 2; the stopper 4 comprises a fixed end 401 and a movable end 402, the fixed end 401 being connected to the syringe 1, the movable end 402 being connected to the base of the needle 2, a one-way valve 5 being arranged in the fixed end 401, and the flow direction of the one-way valve 5 is from the needle 2 to the syringe 1; a push rod 6 being arranged in the movable end 402, and the push rod 6 being able to open the valve core of the one-way valve 5. The present invention adopts a fixed end and a movable end to form a flow stop part, a push rod is arranged in the movable end, and a one-way valve is arranged in the fixed end. The push rod opens the valve core of the one-way valve, and the blood sample is drawn into the syringe through the movement of the piston in the syringe. After the blood sample is drawn, the movable end is away from the fixed end, and the valve core of the one-way valve is reset under the action of a spring to close the end of the syringe close to the needle, thereby ensuring that the blood sample in the syringe will not be contaminated; a protective cover is arranged on the needle tip of the needle, and the protective cover can be mounted on the outer circle of the needle, thereby solving the technical defect that the needle may accidentally injure medical staff.

[0013] Embodiment 2: Based on embodiment 1, the outer ring of the fixed end 401 close to the movable end 402 is provided with one end of a vertical Z-shaped rod. The present invention adopts that one end of a vertical Z-shaped rod is provided on the outer ring of the fixed end, and is connected to the movable end through the Z-shaped rod.

[0014] Embodiment 3: Based on Embodiment 2, the movable end 402 is an L-shaped structure, the angle of the L-shaped structure is an obtuse angle, the cross bar of the L-shaped structure is connected to the base of the needle 2, and the vertical bar of the L-shaped structure is hinged to the other end of the Z-shaped bar away from one end of the cross bar. The present invention adopts a movable end of an L-shaped structure, the cross bar of the L-shaped structure is connected to the base of the needle, the vertical bar of the L-shaped structure is hinged to the other end of the Z-shaped bar, and the movable end can move toward the fixed end.

[0015] Embodiment 4: Based on embodiment 3, the middle part of the vertical rod of the L-shaped structure is movably connected with the middle rod of the Z-shaped rod. The present invention adopts the middle part of the vertical rod of the L-shaped structure to be movably connected with the middle rod of the Z-shaped rod, and the middle part of the vertical rod of the L-shaped structure drives the movable end to move toward the fixed end.

[0016] Embodiment 5: Based on Embodiment 3, the fixed end 401 comprises a U-shaped seat with an outer ring of the syringe 1 opening downward, and one end of the Z-shaped rod is located at the outer ring of the U-shaped seat. The present invention adopts a method of setting a U-shaped seat with an opening downward on the outer ring of the syringe, and connecting the outer ring of the U-shaped seat with one end of the Z-shaped rod, and the other end of the Z-shaped rod is hinged to the movable end.

[0017] Embodiment 6: Based on Embodiment 5, the end of the push rod 6 close to the fixed end 401 is a hemispherical head, a center hole is provided in the push rod 6, the center hole is connected to the needle 2, and the ball head diameter of the push rod 6 is equal to the valve core diameter of the one-way valve 5. The present invention adopts a push rod with a hemispherical head, the ball head diameter of the push rod is equal to the valve core diameter of the one-way valve, and the push rod can move toward the fixed end through the movable end, and the push rod opens the valve core of the one-way valve; the push rod is provided with a center hole connected to the needle, and the drawn blood sample can flow from the needle to the syringe.

[0018] Embodiment 7: Based on Embodiment 5, the protective cover 3 is a rubber strip, and an oblique pull handle is arranged on the outer ring of one end of the rubber strip close to the needle 2, and the needle 2 can be inserted into the protective cover 3. The present invention adopts a rubber strip protective cover, and the needle is inserted into the protective cover, which solves the technical defect that the needle may accidentally stab medical staff; the oblique pull handle on the outer ring of the rubber strip can facilitate the needle to be separated from the protective cover.

[0019] Embodiment 8: On the basis of embodiment 5, the push rod 6 is further provided with a shoulder, and the hemispherical head is located on the shoulder; a sink is provided on the end surface of the fixed end 401 close to the movable end 402, a sealing layer is bonded to the sink, and the shoulder can contact the sealing layer on the sink; a screw hole is provided on the fixed end 401, and a threaded section is provided on the end of the push rod 6 away from the hemispherical head, and the threaded section is screwed into the screw hole. The present invention adopts the method of providing a shoulder on the push rod, providing a sink on the fixed end, bonding a sealing layer on the sink, and when the push rod opens the valve core of the one-way valve, the shoulder contacts the sealing layer on the sink, thereby preventing the blood sample from flowing out from the contact end of the push rod and the valve core of the one-way valve, ensuring the sealing state during blood sample transmission, and preventing blood sample leakage.

[0020] In the specific implementation, before blood sampling, the movable end 402 moves toward the fixed end 401, and the push rod 6 set in the movable end 402 opens the valve core of the one-way valve 5, and moves toward the needle 2 through the piston in the syringe 1 to discharge the air in the syringe 1, and the movable end 402 moves away from the fixed end 401; the valve core of the one-way valve 5 is reset under the action of the spring, and the end of the syringe 1 close to the needle 2 is closed; when blood is collected, the needle 2 enters the blood vessel 0.5~1cm, the movable end 402 moves toward the fixed end 401, and the push rod 6 set in the movable end 402 The rod 6 opens the valve core of the one-way valve 5, and moves away from the needle 2 through the piston in the syringe 1, so that the drawn blood sample enters the syringe 1; when the blood collection is completed, the needle 2 withdraws from the blood vessel, compresses the hemostatic cotton of the hemostatic patch on the blood drawing point, and at the same time, the movable end 402 moves away from the fixed end 401; the valve core of the one-way valve 5 is reset under the action of the spring, and the end of the syringe 1 close to the needle 2 is closed, which can ensure that the blood sample in the syringe will not be contaminated; the needle tip of the needle 2 is inserted into the protective cover 3, which solves the technical defect that the needle may accidentally stab medical staff.

[0021] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A safe arterial blood sampling device, comprising a syringe (1), characterized in that: One end of the syringe (1) is connected to the needle (2) via a flow stopper (4); a protective sleeve (3) is provided on the needle tip of the needle (2); the protective sleeve (3) can be sleeved on the outer ring of the needle (2); the flow stopper (4) comprises a fixed end (401) and a movable end (402); the fixed end (401) is connected to the syringe (1); the movable end (402) is connected to the base of the needle (2); a one-way valve (5) is provided in the fixed end (401); the flow direction of the one-way valve (5) is from the needle (2) to the syringe (1); a push rod (6) is provided in the movable end (402); the push rod (6) can open the valve core of the one-way valve (5).

2. A safe arterial blood sampling device according to claim 1, characterized in that: An end of a vertically placed Z-shaped rod is disposed on the outer ring of the fixed end (401) close to the movable end (402).

3. A safe arterial blood sampling device according to claim 2, characterized in that: The movable end (402) is an L-shaped structure, the angle of the L-shaped structure is an obtuse angle, the crossbar of the L-shaped structure is connected to the base of the needle (2), and the vertical rod of the L-shaped structure is hinged to the other end of the Z-shaped rod away from one end of the crossbar.

4. A safe arterial blood sampling device according to claim 3, characterized in that: The middle part of the vertical rod of the L-shaped structure is movably connected to the middle rod of the Z-shaped rod.

5. A safe arterial blood sampling device according to claim 3, characterized in that: The fixed end (401) comprises a U-shaped seat with an outer ring of the syringe (1) opening downward, and one end of the Z-shaped rod is located on the outer ring of the U-shaped seat.

6. A safe arterial blood sampling device according to claim 5, characterized in that: A push rod (6) is arranged in the movable end (402), and the end of the push rod (6) close to the fixed end (401) is a hemispherical head. A central hole is arranged in the push rod (6), and the central hole is connected to the needle head (2). The diameter of the ball head of the push rod (6) is equal to the valve core diameter of the one-way valve (5).

7. A safe arterial blood sampling device according to claim 5, characterized in that: The protective cover (3) is a rubber strip, and an outer ring of one end of the rubber strip close to the needle (2) is provided with an inclined pulling handle, so that the needle (2) can be inserted into the protective cover (3).

8. A safe arterial blood sampling device according to claim 5, characterized in that: The push rod (6) is also provided with a shaft shoulder, and the hemispherical head is located on the shaft shoulder; a sinking platform is provided on the end surface of the fixed end (401) close to the movable end (402), and a sealing layer is bonded to the sinking platform, and the shaft shoulder can contact the sealing layer on the sinking platform.

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