Blood taking needle convenient for both vein blood taking and artery blood taking

Abstract

The utility model provides a blood taking needle convenient for vein blood taking and artery blood taking, which belongs to the technical field of medical instruments and comprises a blood taking tube and a liquid clamping piece. The blood collection tube comprises a liquid inlet tube section and two liquid outlet tube sections; the inlet end of the liquid inlet pipe section is connected with a blood sampling needle head, and the liquid outlet end of the liquid inlet pipe section is connected with the two symmetrical liquid outlet pipe sections to form a Y-shaped node; the liquid clamping piece comprises a shell, a liquid inlet limiting piece, a liquid outlet limiting piece and two positioning pieces. According to the blood taking needle conveniently shared by vein blood taking and artery blood taking, the liquid inlet pipe section of the Y-shaped node is limited by the liquid inlet limiting piece before blood taking, so that blood is prevented from flowing backwards; one liquid outlet pipe section is pulled backwards during blood drawing, and the liquid outlet pipe section is pulled to be fixed to the shell through the positioning piece; the blood taking needle is convenient in blood taking operation and can be quickly adjusted by one hand in time, so that the blood taking time is saved; besides, flow blocking of the liquid inlet pipe section can be achieved before and after blood sampling, and blood leakage is reduced and avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and more specifically, it relates to a blood collection needle facilitating the sharing of venous blood collection and arterial blood collection. Background Art

[0002] For an ordinary venous blood collection needle, the needle tip at one end is inserted into a blood vessel, and the needle tip wrapped with a rubber stopper at the other end is connected to a disposable vacuum blood collection tube, and several tubes of blood can be drawn by one puncture. However, in some special departments such as emergency and intensive care unit (ICU), arterial blood is often collected, and the radial artery, dorsalis pedis artery and femoral artery are usually selected. At this time, an arterial blood gas needle is usually required for blood collection.

[0003] Clinically, in order to relieve the pain of patients, the workload of nursing and the protection of patients' blood vessels, when collecting arterial blood, a disposable venous blood collection needle is often used to puncture the artery of the patient. In this way, the disposable venous blood collection needle needs to be connected to both a vacuum blood collection tube and an arterial blood gas needle. Most of the existing blood collection needles are provided with liquid stop clips on two blood collection tubes. The liquid stop clip is used to prevent blood from flowing into this section of the blood collection tube and avoid blood leakage. It is inconvenient to control the two liquid stop clips on the blood collection tube with one hand during blood collection, which affects the speed of blood collection operation. Content of the Utility Model

[0004] The purpose of the utility model is to provide a blood collection needle facilitating the sharing of venous blood collection and arterial blood collection, aiming to improve the blood collection speed and save blood collection time.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a blood collection needle facilitating the sharing of venous blood collection and arterial blood collection, including:

[0006] A blood collection tube, including an inlet tube section and two outlet tube sections; the inlet end of the inlet tube section is connected to a blood collection needle head, and the outlet end of the inlet tube section is connected to the two symmetrical outlet tube sections to form a Y-shaped node;

[0007] A liquid clamping member, including a housing, an inlet liquid limiting member, an outlet liquid limiting member and two positioning members; the housing is sleeved outside the Y-shaped node, the housing is fixedly connected to the inlet end of the Y-shaped node, and the housing is movably connected to the outlet end of the Y-shaped node; the inlet liquid limiting member is movably arranged in the inner cavity of the housing along the transverse direction and drives the inlet tube section to bend and block the flow; the outlet liquid limiting member is fixedly arranged in the inner cavity of the housing and is located between the two outlet tube sections; the two positioning members correspond to the two outlet tube sections one by one, and the positioning member connects the housing and the outlet tube section to limit the movement of the outlet tube section;

[0008] Any of the liquid outlet pipe segments is pulled backward, driving the Y-shaped node from the rear side of one side of the liquid outlet limiting member, driving the liquid inlet pipe segment to straighten and open, and at the same time, the other liquid outlet pipe segment is bent and blocked by the liquid outlet limiting member.

[0009] As another embodiment of the present application, the liquid inlet limiting member includes:

[0010] A force application structure, including a force application bracket, a sliding rod, and an elastic member; the force application bracket is connected to the inner side wall of the housing, the bottom of the sliding rod is movably connected to the force application bracket along the width direction or the thickness direction of the housing, and the top of the sliding rod abuts against the outer side wall of the liquid inlet pipe segment; the elastic member is connected to the bottom of the sliding rod and the inner side wall of the housing, and the elastic member is always in a compressed state;

[0011] A force receiving structure, including a force receiving bracket and an elastic resistance film, the force receiving bracket and the force application bracket are arranged opposite to each other; the elastic resistance film is transversely arranged at the free end of the force receiving bracket and is in a tensioned state, the elastic resistance film is consistent with the length direction of the liquid inlet pipe segment and is arranged opposite to the elastic member.

[0012] As another embodiment of the present application, the force application bracket includes:

[0013] An outer support frame, the outer support frame includes a support frame body and a baffle, the baffle is parallel to the side plate of the housing and perpendicular to the length direction of the elastic member; a through hole allowing the elastic member to penetrate is provided in the middle of the baffle;

[0014] A sliding frame, the sliding frame is arranged inside the support frame body along the height direction of the support frame body; a sliding groove is provided on the sliding frame along the height direction of the support frame body; the bottom of the elastic member is provided with a sliding extension part that is slidably matched with the sliding groove; the length of the sliding extension part is greater than the through hole.

[0015] As another embodiment of the present application, the center line of the liquid outlet limiting member coincides with the center line of the housing.

[0016] As another embodiment of the present application, the liquid outlet limiting member extends along the height direction of the housing; one side of the liquid outlet limiting member close to the connection part of the Y-shaped node has a limiting edge for abutting against the liquid outlet pipe segment.

[0017] As another embodiment of the present application, the cross section of the liquid outlet limiting member is triangular, circular or semi-circular.

[0018] As another embodiment of the present application, the positioning member is a limiting flexible pad arranged on the liquid outlet pipe segment; the limiting flexible pad is used for clamping the pipe hole of the housing adapted to the liquid outlet pipe segment.

[0019] As another embodiment of the present application, the limiting flexible pad includes two pad bodies arranged at intervals, and the planes where the two pad bodies are located are perpendicular to the length direction of the liquid outlet pipe section.

[0020] As another embodiment of the present application, the back of the limiting flexible pad is provided with a wear-resistant part, and the wear-resistant part is attached to the shell.

[0021] As another embodiment of the present application, a connector is provided at the end of the liquid outlet pipe section, and a cover is provided on the outside of the connector.

[0022] The beneficial effects of the blood collection needle facilitating the common use of venous blood collection and arterial blood collection provided by the present utility model are as follows: Compared with the prior art, the blood collection needle facilitating the common use of venous blood collection and arterial blood collection of the present utility model has the inlet pipe section of the Y-shaped node restricted by the inlet liquid limiting member before blood collection to prevent blood from flowing backward; when collecting blood, one of the liquid outlet pipe sections is pulled backward, and the liquid outlet pipe section is pulled to be fixed to the shell by means of the positioning member; at this time, the Y-shaped node drives the inlet pipe section to extend to an open state, and the other liquid outlet pipe section is bent and blocked by the liquid outlet limiting member during the movement to prevent blood from flowing in; the blood collection operation of the blood collection needle is convenient, and it can be quickly adjusted even with one hand, saving the time for blood collection; moreover, the flow of the inlet pipe section can be blocked before and after blood collection, reducing and avoiding blood leakage. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the blood collection needle facilitating the common use of venous blood collection and arterial blood collection provided by the embodiment of the present utility model;

[0025] Figure 2 It is a schematic structural diagram of the liquid blocking member in the closed state provided by the embodiment of the present utility model;

[0026] Figure 3 It is a schematic structural diagram of the liquid blocking member in the open state provided by the embodiment of the present utility model.

[0027] In the figure: 1. Blood collection needle head; 2. Liquid blocking member; 21. Shell; 22. Rubber sleeve; 23. Force application bracket; 24. Sliding frame; 25. Elastic member; 26. Baffle; 27. Sliding rod; 28. Liquid outlet limiting member; 29. Elastic blocking membrane; 3. Connector; 4. Tail needle; 5. Inlet pipe section; 6. Liquid outlet pipe section; 7. Positioning member. Detailed Embodiments

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] Please refer to Figures 1 to 3 , and now the blood collection needle provided by the present utility model that is convenient for sharing venous blood collection and arterial blood collection will be described. The blood collection needle convenient for sharing venous blood collection and arterial blood collection includes a blood collection tube and a liquid blocking member 2; the blood collection tube includes an inlet tube section 5 and two outlet tube sections 6; the inlet end of the inlet tube section 5 is connected to a blood collection needle head 1, and the outlet end of the inlet tube section 5 is connected to two symmetric outlet tube sections 6 to form a Y-shaped node; the liquid blocking member 2 includes a housing 21, an inlet liquid limiting member, an outlet liquid limiting member 28 and two positioning members 7; the housing 21 is sleeved outside the Y-shaped node, the housing 21 is fixedly connected to the inlet end of the Y-shaped node, and the housing 21 is movably connected to the outlet end of the Y-shaped node; the inlet liquid limiting member is movably arranged in the inner cavity of the housing 21 along the transverse direction and drives the inlet tube section 5 to bend and block the flow; the outlet liquid limiting member 28 is fixedly arranged in the inner cavity of the housing 21 and is located between the two outlet tube sections 6; the two positioning members 7 correspond to the two outlet tube sections 6 one by one, and the positioning member 7 connects the housing 21 and the outlet tube section 6 to limit the movement of the outlet tube section 6; any one of the outlet tube sections 6 is pulled backward, driving the Y-shaped node from the rear side of one side of the outlet liquid limiting member 28, driving the inlet tube section 5 to straighten and open, and at the same time the other outlet tube section 6 is bent and blocked by the outlet liquid limiting member 28.

[0030] The blood collection needle provided by the present utility model, compared with the prior art, sets the Y-shaped node inside the housing 21 of the liquid blocking member 2 and uses the liquid blocking member 2 to achieve the function of blocking the flow; before blood collection, the inlet tube section 5 of the Y-shaped node is restricted by the inlet liquid limiting member to prevent blood from flowing backward; when blood collection, one of the outlet tube sections 6 is pulled backward, and the outlet tube section 6 is pulled to be fixed to the housing 21 by means of the positioning member 7; at this time, the Y-shaped node drives the inlet tube section 5 to extend to an open state, and the other outlet tube section 6 is bent and blocked by the outlet liquid limiting member 28 during the movement to prevent blood from flowing in; the blood collection operation of the blood collection needle is convenient, and it can be quickly adjusted even with one hand, saving the time of blood collection; moreover, the flow of the inlet tube section 5 can be blocked before and after blood collection, reducing and avoiding blood leakage.

[0031] Three through holes are provided on the side wall of the housing 21. The three through holes include a first limiting hole allowing the liquid inlet pipe section 5 to pass through, and two second limiting holes allowing the liquid outlet pipe sections 6 to pass through. The two second limiting holes are symmetrically arranged and are provided on two side plates in the width direction of the housing 21. The first limiting hole is provided on the side plate in the length direction of the housing 21, and the axis of the first limiting hole coincides with the midline in the length direction of the housing 21. A rubber sleeve 22 is sleeved in the first limiting hole. The rubber sleeve 22 can allow the liquid inlet pipe section 5 to pass through and fix the liquid inlet pipe section 5, and prevent the liquid inlet pipe section 5 from moving by increasing the friction between the liquid inlet pipe section 5 and the rubber sleeve 22. A gap is left between the second limiting hole and the liquid outlet pipe section 6 to facilitate the movement of the liquid outlet pipe section 6.

[0032] The positioning member 7 can adopt the rubber sleeve 22, and the rubber sleeve 22 is fixedly connected to the liquid outlet pipe section 6. When the liquid outlet pipe section 6 is pulled, it moves backward with the liquid outlet pipe section 6 until it is clamped in the second limiting hole to fix the liquid outlet pipe section 6.

[0033] A connector 3 is provided at the end of the liquid outlet pipe section 6, and a cover is provided on the outside of the connector 3. The connector 3 is used to connect the tail needle 4 or the arterial blood gas needle. Optionally, the connector 3 and the tail needle 4 can be connected by thread or plug-in. The connector 3 and the arterial blood gas needle can be connected by thread or plug-in.

[0034] In some possible embodiments, please refer to Figure 2 , the liquid inlet limiting member includes a force application structure and a force receiving structure; the force application structure includes a force application bracket 23, a sliding rod 27 and an elastic member 25; the force application bracket 23 is connected to the inner side wall of the housing 21, the bottom of the sliding rod 27 is movably connected to the force application bracket 23 along the width direction or the thickness direction of the housing 21, and the top of the sliding rod 27 abuts against the outer side wall of the liquid inlet pipe section 5; the elastic member 25 connects the bottom of the sliding rod 27 and the inner side wall of the housing 21, and the elastic member 25 is always in a compressed state; the force receiving structure includes a force receiving bracket and an elastic resistance film 29, and the force receiving bracket and the force application bracket 23 are arranged oppositely; the elastic resistance film 29 is transversely arranged at the free end of the force receiving bracket and is in a tensioned state, the elastic resistance film 29 is consistent with the length direction of the liquid inlet pipe section 5 and is arranged oppositely to the elastic member 25.

[0035] The force application bracket 23 is located inside the housing 21, and the length direction of the force application bracket 23 is consistent with the length direction of the housing 21. When the liquid inlet limiting member moves along the width direction of the housing 21, the height direction of the force application bracket 23 is consistent with the width direction of the housing 21; when the liquid inlet limiting member moves along the thickness direction of the housing 21, the height direction of the force application bracket 23 is consistent with the height direction of the housing 21.

[0036] When the height direction of the force application bracket 23 is consistent with the width direction of the housing 21, the force receiving bracket is located on the other side of the housing 21 and is symmetrically arranged with the force application bracket 23.

[0037] A sliding rod 27 is slidably arranged on the force - applying support 23, and the sliding rod 27 slides along the height direction of the force - applying support 23; the free end of the sliding rod 27 abuts against one side of the liquid inlet pipe section 5 and bends and limits the flow of the liquid inlet pipe section 5 by its own movement. The elastic member 25 connects the sliding rod 27 and the housing 21, and the elastic member 25 pushes the sliding rod 27 to squeeze the liquid inlet pipe section 5 through its own elasticity. When the liquid outlet pipe section 6 is pulled, the liquid inlet pipe section 5 receives a pulling force and moves backward, and is straightened. During the straightening process, it exerts a squeezing force on the sliding rod 27. When the liquid inlet pipe section 5 is straightened, the sliding rod 27 retracts to the inside of the force - applying support 23.

[0038] The sliding rod 27 squeezes the liquid inlet pipe section 5 and abuts it against the elastic resistance film 29, and the elastic resistance film 29 reduces the wear of the liquid inlet pipe section 5. The elastic resistance film 29 can be made of rubber in a tensioned state.

[0039] Specifically, the force - applying support 23 includes an outer support frame and a sliding frame 24; the outer support frame includes a support frame body and a baffle 26, the baffle 26 is parallel to the side plate of the housing 21 and perpendicular to the length direction of the elastic member 25; a through - hole allowing the elastic member 25 to pass through is provided in the middle of the baffle 26; the sliding frame 24 is arranged inside the support frame body along the height direction of the support frame body; a chute along the height direction of the support frame body is provided on the sliding frame 24; the bottom of the elastic member 25 is provided with a sliding extension part that is slidably matched with the chute; the length of the sliding extension part is greater than the through - hole. The elastic member 25 is a spring.

[0040] The support frame body of the force - applying support 23 is symmetric with the frame body of the force - receiving support, and they are the same in length and height. The baffle 26 is located at the end of the support frame body, and the baffle 26 is symmetric with the elastic resistance film 29.

[0041] The sliding frame 24 is located inside the support frame body, and the end of the sliding frame 24 is connected to the baffle 26 and the inner side wall of the housing 21. The sliding rod 27 is slidably connected to the sliding frame 24 and moves up and down along the sliding frame 24. The length of the sliding extension part connected to the sliding frame 24 at the bottom of the sliding rod 27 is greater than the through - hole, so the sliding extension part of the sliding rod 27 is limited below the baffle 26, preventing the sliding rod 27 from slipping out of the through - hole.

[0042] In some possible embodiments, please refer to Figure 2 , the mid - line of the liquid outlet limiting member 28 coincides with the mid - line of the housing 21. The liquid outlet limiting member 28 has the same limiting effect on the two liquid outlet pipe sections 6. The liquid outlet limiting member 28 is located in front of the second limiting hole.

[0043] Specifically, the liquid outlet limiting member 28 extends along the height direction of the housing 21; one side of the liquid outlet limiting member 28 close to the connection part of the Y - shaped node has a limiting edge for abutting against the liquid outlet pipe section 6.

[0044] The limiting edge of the liquid outlet limiting member 28 is used to abut against the side surface of one of the liquid outlet pipe segments 6, and with the traction of the other liquid outlet pipe segment 6, the liquid outlet pipe segment 6 will be bent to form a fold angle by means of the limiting edge. The fold angle will squeeze the liquid outlet pipe segment 6 to block the flow.

[0045] During blood collection, the unused liquid outlet pipe segment 6 is not only bent by the liquid outlet limiting member 28, but the pipe orifice at the Y-shaped node faces the used liquid outlet pipe segment 6, which makes the blood entering the Y-shaped node from the liquid inlet pipe segment 5 flow towards the used liquid outlet pipe segment 6, rather than flowing reversely into the unused liquid outlet pipe segment 6.

[0046] Optionally, the cross-section of the liquid outlet limiting member 28 is triangular, circular or semi-circular.

[0047] In some possible embodiments, please refer to Figure 2 , the positioning member 7 is a limiting flexible pad provided on the liquid outlet pipe segment 6; the limiting flexible pad is used to snap into the pipe hole of the housing 21 adapted to the liquid outlet pipe segment 6.

[0048] The limiting flexible pad can pass through the second limiting hole under the action of an external force; the limiting flexible pad is located outside the liquid outlet pipe segment 6. The flexible limiting pad passes through the second limiting hole under the action of an external force and abuts against the outside of the second limiting hole.

[0049] Optionally, the limiting flexible pad includes two spaced-apart pad bodies, and the planes where the two pad bodies are located are perpendicular to the length direction of the liquid outlet pipe segment 6. The two pad bodies can pass through the second limiting hole under the action of an external force. After blood collection is completed, with the assistance of an artificial hand, the two pad bodies pass through the second limiting hole, and under the action of the elastic member 25, the liquid outlet pipe segment 6 is driven by the liquid inlet pipe segment 5 to retract.

[0050] The back of the limiting flexible pad is provided with a wear-resistant portion, and the wear-resistant portion is in contact with the housing 21. The wear-resistant portion can increase the friction force by means of setting patterns on the back, etc.

[0051] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A blood collection needle that is convenient for both venous and arterial blood collection, characterized in that: include: A blood collection tube, comprising a liquid inlet tube section (5) and two liquid outlet tube sections (6); the inlet end of the liquid inlet tube section (5) is connected to a blood collection needle (1), and the liquid outlet end of the liquid inlet tube section (5) is connected to two symmetrical liquid outlet tube sections (6) to form a Y-shaped node; The liquid blocking member (2) comprises a shell (21), a liquid inlet limiting member, a liquid outlet limiting member (28) and two positioning members (7); the shell (21) is sleeved on the outer side of the Y-shaped node, the shell (21) is fixedly connected to the liquid inlet end of the Y-shaped node, and the shell (21) is movably connected to the liquid outlet end of the Y-shaped node; the liquid inlet limiting member is movably arranged in the inner cavity of the shell (21) in the transverse direction, and drives the liquid inlet pipe section (5) to bend and block flow; the liquid outlet limiting member (28) is fixedly arranged in the inner cavity of the shell (21) and is located between the two liquid outlet pipe sections (6); the two positioning members (7) correspond to the two liquid outlet pipe sections (6) one by one, and the positioning member (7) connects the shell (21) and the liquid outlet pipe section (6) to limit the movement of the liquid outlet pipe section (6); Any one of the liquid outlet pipe sections (6) is pulled backwards, driving the Y-shaped node from the rear side of one side of the liquid outlet limiting component (28), driving the liquid inlet pipe section (5) to straighten and open, while the other liquid outlet pipe section (6) is bent and blocked by means of the liquid outlet limiting component (28).

2. The blood collection needle for venous blood collection and arterial blood collection as claimed in claim 1, characterized in that: The liquid inlet limiting member comprises: The force-applying structure comprises a force-applying bracket (23), a sliding rod (27) and an elastic member (25); the force-applying bracket (23) is connected to the inner side wall of the shell (21); the bottom of the sliding rod (27) is movably connected to the force-applying bracket (23) along the width direction or thickness direction of the shell (21); the top of the sliding rod (27) is against the outer side wall of the liquid inlet pipe section (5); the elastic member (25) connects the bottom of the sliding rod (27) and the inner side wall of the shell (21); the elastic member (25) is always in a compressed state; The force-bearing structure comprises a force-bearing support and an elastic resistance membrane (29), wherein the force-bearing support and the force-applying support (23) are arranged relative to each other; the elastic resistance membrane (29) is transversely arranged at the free end of the force-bearing support and is in a tensioned state, and the elastic resistance membrane (29) is consistent with the length direction of the liquid inlet pipe section (5) and is arranged relative to the elastic member (25).

3. The blood collection needle for venous blood collection and arterial blood collection as claimed in claim 2, characterized in that: The force-applying support (23) comprises: An outer support frame, the outer support frame comprising a support frame body and a baffle (26), the baffle (26) being parallel to the side plate of the shell (21) and perpendicular to the length direction of the elastic member (25); a through hole is provided in the middle of the baffle (26) to allow the elastic member (25) to pass through; A sliding frame (24), wherein the sliding frame (24) is arranged on the inner side of the support frame body along the height direction of the support frame body; the sliding frame (24) is provided with a sliding groove along the height direction of the support frame body; the bottom of the elastic member (25) is provided with a sliding extension portion that slides with the sliding groove; the length of the sliding extension portion is greater than the through hole.

4. The blood collection needle for venous blood collection and arterial blood collection as claimed in claim 1, characterized in that: The center line of the liquid outlet limiting member (28) coincides with the center line of the housing (21).

5. The blood collection needle for venous blood collection and arterial blood collection as claimed in claim 4, characterized in that: The liquid outlet limiting member (28) extends in the height direction of the shell (21); and a side of the liquid outlet limiting member (28) close to the connection point of the Y-shaped node has a limiting edge for abutting against the liquid outlet pipe section (6).

6. The blood collection needle for venous blood collection and arterial blood collection as claimed in claim 5, characterized in that: The cross section of the liquid outlet limiting member (28) is triangular, circular or semicircular.

7. The blood collection needle for venous blood collection and arterial blood collection as claimed in claim 1, characterized in that: The positioning member (7) is a position-limiting flexible pad provided on the liquid outlet pipe section (6); the position-limiting flexible pad is used to clamp the housing (21) to a tube hole that matches the liquid outlet pipe section (6).

8. The blood collection needle for venous blood collection and arterial blood collection as claimed in claim 7, characterized in that: The position-limiting flexible pad comprises two pad bodies which are spaced apart from each other, and the planes on which the two pad bodies are located are perpendicular to the length direction of the liquid outlet pipe section (6).

9. The blood collection needle for venous blood collection and arterial blood collection as claimed in claim 8, characterized in that: The back of the position-limiting flexible pad is provided with a wear-resistant portion, and the wear-resistant portion is in contact with the shell (21).

10. The blood collection needle for venous blood collection and arterial blood collection as claimed in claim 1, characterized in that: A connector (3) is provided at the end of the liquid outlet pipe section (6), and a sealing cover is provided on the outer side of the connector (3).

Images