Double-loop blood taking needle

Abstract

The utility model discloses a double-loop blood taking needle which comprises a blood taking assembly, a butterfly-shaped positioning piece is fixedly installed at the top end of the blood taking assembly, a vein needle is fixedly connected in the blood taking assembly, a drainage tube is fixedly connected to the bottom end of the blood taking assembly, and a driving assembly is connected to the tail end of the drainage tube. The middle section of the drainage tube is fixedly connected with a flow dividing tube, and the tail end of the flow dividing tube is connected with a collecting assembly. When blood is too thick, an injector is introduced through a guide block, the head of the injector drives a fixing block, a needle body is inserted into the position above a sealing gasket, the top of the injector pushes a pressing plate, a connecting rod is driven to drive a connecting block to move, and the connecting block synchronously drives the fixing block to move; according to the blood taking needle based on the double loops, the blood taking needle is driven by the driving assembly, so that the blood can be smoothly sucked out under different conditions, and the situation that the needle is punctured for multiple times is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of blood collection needles, in particular to a double-loop blood collection needle. Background Art

[0002] A blood collection needle is a blood collection needle used for collecting blood samples during medical examinations. The blood collection needle at its top is used to puncture blood vessels, and the transparent hose at the tail end is connected to the tail needle. The tail needle is wrapped by a rubber hose and an outer needle cap, which is used to pierce a vacuum blood collection tube, and the negative pressure in the tube is used to suck the blood into the tube.

[0003] However, in the actual use process, vacuum blood collection needles often have some deficiencies. When collecting blood from some people with relatively viscous or poor fluidity of blood, it is difficult to smoothly suck the blood in the blood vessels using a vacuum negative pressure tube. This often causes patients to be blood-collected multiple times, reducing the blood collection efficiency and affecting the patient's use experience.

[0004] Therefore, the utility model provides a double-loop blood collection needle to solve the above problems. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a double-loop blood collection needle to solve the above problems.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions: A double-loop blood collection needle includes a blood collection assembly. A butterfly positioning piece is fixedly installed at the top of the blood collection assembly. An intravenous needle is fixedly connected inside the blood collection assembly. A drainage tube is fixedly connected to the bottom of the blood collection assembly. The end of the drainage tube is connected to a driving assembly. A shunt tube is fixedly connected to the middle section of the drainage tube. The end of the shunt tube is connected to a collection assembly.

[0007] Preferably, the driving assembly includes a connecting cylinder. The connecting cylinder is fixed at the end of the drainage tube. A sealing pad is fixedly connected to the top of the connecting cylinder. The top of the sealing pad is fixedly connected to the end of the drainage tube. A main isolation plate is fixedly connected inside the connecting cylinder. A sub-isolation plate is fixedly connected inside the connecting cylinder and below the main isolation plate. A pressing assembly is fixedly connected to the top of the sub-isolation plate. A fixing block is fixedly connected to the top of the pressing assembly. A needle body is fixedly connected to the top of the fixing block.

[0008] Preferably, the pressing assembly includes a spring. The spring is fixed to the top of the sub-isolation plate. A connecting block is fixedly connected to the top of the spring. A connecting rod is fixedly connected to the bottom of the connecting block and inside the spring. The bottom end of the connecting rod extends below the sub-isolation plate and is fixedly connected to a pressing plate.

[0009] Preferably, the blood collection assembly includes an anti-backflow housing fixed to the top of the drainage tube. A guide rod is fixedly connected inside the anti-backflow housing. A support plate is slidably connected inside the anti-backflow housing. A conical block is fixedly connected to the top of the support plate. A drainage plate is fixedly connected to the bottom of the support plate. A fixing member is fixedly connected to the top of the anti-backflow housing, and the inside of the fixing member is fixedly connected to the outside of the venous needle. A clamping block is fixedly connected inside the anti-backflow housing.

[0010] Preferably, the collection assembly includes a spiral connector fixed to the end of the shunt tube. A limit housing is threadedly connected to the outside of the spiral connector. A puncture needle is fixedly connected inside the spiral connector, and a vacuum collection tube is arranged outside the puncture needle.

[0011] Preferably, a guide block is fixedly connected to the bottom of the fixed block, and the connecting cylinder is connected to a syringe through the guide block.

[0012] Preferably, an annular groove is formed at the top of the clamping block, and the top end of the conical block extends into the inside of the connecting member.

[0013] Advantageous Effects

[0014] The present utility model provides a double-circuit blood collection needle. Compared with the prior art, the following advantageous effects are achieved:

[0015] (1) Under normal circumstances, blood flows into the collection assembly through the shunt tube, enters the puncture needle through the spiral connector, and then enters the vacuum collection tube. When the blood is too thick, the syringe is introduced through the guide block, so that the head of the syringe drives the fixed block to insert the needle body above the sealing gasket. The top of the syringe pushes the pressing plate to drive the connecting rod to drive the connecting block to move, and the connecting block synchronously drives the fixed block to move, and then the syringe is pulled to suck out the blood. Based on this double-circuit blood collection needle, driven by the driving assembly, it can smoothly suck out the blood in different situations, preventing the situation of multiple needle insertions.

[0016] (2) First, the vacuum collection tube is inserted into the limit housing through the puncture needle, and the venous needle is inserted into the human vein using the butterfly positioning member. Blood passes through the venous needle and the fixing member and reaches the anti-backflow housing. The blood flows out from the drainage plate through the support plate, and then flows into the drainage tube through the groove on the clamping block. In case of blood backflow, the blood flows into the conical block, causing the conical block to drive the support plate to slide in the anti-backflow housing, so that the conical block blocks the lower end of the fixing member. Based on this double-circuit blood collection needle, through the back-blocking of the conical block, blood backflow is prevented, protecting the human blood from being polluted and causing harm to the human body. Description of the Drawings

[0017] Figure 1 is a three-dimensional external structure diagram of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of the pressing component of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of the collection component of the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the blood collection component of the present utility model;

[0021] Figure 5 It is the Figure 2 enlarged view at position a in the present utility model.

[0022] In the figure: 1. Blood collection component; 11. Anti-backflow housing; 12. Clamping block; 13. Support plate; 14. Drainage plate; 15. Conical block; 16. Connecting piece; 17. Guide rod; 2. Drainage tube; 3. Shunt tube; 4. Pressing component; 41. Connecting cylinder; 42. Sealing gasket; 43. Fixed block; 44. Needle body; 45. Main isolation plate; 46. Sub-isolation plate; 47. Pressing component; 471. Spring; 472. Connecting rod; 473. Connecting block; 474. Pressing plate; 48. Guide block; 5. Collection component; 51. Limit housing; 52. Spiral connecting piece; 53. Puncture needle; 54. Vacuum collection tube; 6. Butterfly positioning piece; 7. Venous needle; 8. Syringe. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1:

[0025] Please refer to Figures 1-5 , a double-loop blood collection needle, including a blood collection component 1, a butterfly positioning piece 6 is fixedly installed at the top of the blood collection component 1, a venous needle 7 is fixedly connected inside the blood collection component 1, a drainage tube 2 is fixedly connected to the bottom of the blood collection component 1, a driving component 4 is connected to the end of the drainage tube 2, a shunt tube 3 is fixedly connected to the middle section of the drainage tube 2, and a collection component 5 is connected to the end of the shunt tube 3.

[0026] Further, the driving component 4 includes a connecting cylinder 41 which is fixed to the end of the drainage tube 2. A sealing gasket 42 is fixedly connected to the top of the connecting cylinder 41, and the top of the sealing gasket 42 is fixedly connected to the end of the drainage tube 2. A main isolation plate 45 is fixedly connected inside the connecting cylinder 41. A secondary isolation plate 46 is fixedly connected inside the connecting cylinder 41 and below the main isolation plate 45. A pressing component 47 is fixedly connected to the top of the secondary isolation plate 46. A fixing block 43 is fixedly connected to the top of the pressing component 47. A needle body 44 is fixedly connected to the top of the fixing block 43. When the blood is too thick, the syringe 8 is introduced through the guiding block 48, so that the head of the syringe 8 drives the fixing block 43 to insert the needle body 44 above the sealing gasket 42.

[0027] Further, the pressing component 47 includes a spring 471 which is fixed to the top of the secondary isolation plate 46. The top end of the spring 471 is fixedly connected to a connecting block 473. A connecting rod 472 is fixedly connected to the bottom of the connecting block 473 and inside the spring 471. The bottom end of the connecting rod 472 extends below the secondary isolation plate 46 and is fixedly connected to a pressing plate 474. The top of the syringe 8 pushes the pressing plate 474 to drive the connecting block 473 to move by driving the connecting rod 472, and the connecting block 473 synchronously drives the fixing block 43 to move.

[0028] Further, a guiding block 48 is fixedly connected to the bottom of the fixing block 43. The connecting cylinder 41 is connected to the syringe 8 through the guiding block 48, so that the syringe 8 can reach a proper position and reduce the occurrence of accidents.

[0029] Embodiment Two:

[0030] Please refer to Figures 1-4 , this embodiment provides a technical solution on the basis of Embodiment One: The blood collection component 1 includes an anti-backflow outer shell 11 which is fixed to the top of the drainage tube 2. A guide rod 17 is fixedly connected inside the anti-backflow outer shell 11. A support plate 13 is slidably connected inside the anti-backflow outer shell 11. A conical block 15 is fixedly connected to the top of the support plate 13. A drainage plate 14 is fixedly connected to the bottom of the support plate 13. A fixing piece 16 is fixedly connected to the top of the anti-backflow outer shell 11, and the inside of the fixing piece 16 is fixedly connected to the outside of the venous needle 7. A clamping block 12 is fixedly connected inside the anti-backflow outer shell 11. The blood reaches the anti-backflow outer shell 11 through the venous needle 7 and the fixing piece 16. The blood flows out from the drainage plate 14 through the support plate 13, and then flows into the drainage tube 2 through the groove on the clamping block 12. In case of backflow, the blood flows into the conical block 15, so that the conical block 15 drives the support plate 13 to slide inside the anti-backflow outer shell 11, thereby blocking the lower end of the fixing piece 16 with the conical block 15.

[0031] Further, the collection component 5 includes a spiral connector 52. The spiral connector 52 is fixed at the end of the shunt tube 3. An outer thread of the spiral connector 52 is connected to a limit housing 51. A puncture needle 53 is fixedly connected inside the spiral connector 52. A vacuum collection tube 54 is arranged outside the puncture needle 53. Under normal circumstances, blood flows into the collection component 5 through the shunt tube 3, enters the puncture needle 53 through the spiral connector 52, and then enters the vacuum collection tube 54.

[0032] Further, an annular groove is formed at the top of the clamping block 12. The top end of the tapered block 15 extends into the inside of the connecting piece 16, so that the support plate 13 slides in the anti-backflow housing 11 to prevent rotation. The annular groove prevents the support plate 13 from blocking the inflow port above the clamping block 12 during forward flow.

[0033] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0034] During operation, first insert the vacuum collection tube 54 into the limit housing 51 through the puncture needle 53. Use the butterfly positioning member 6 to insert the venous needle 7 into a human vein. Blood passes through the venous needle 7 and the fixing member 16 and reaches the anti-backflow housing 11. The blood flows out from the drainage plate 14 through the support plate 13, and then flows into the drainage tube 2 through the groove on the clamping block 12. In case of backflow, the blood flows into the tapered block 15, causing the tapered block 15 to drive the support plate 13 to slide in the anti-backflow housing 11, so that the tapered block 15 blocks the lower end of the fixing member 16. Under normal circumstances, blood flows into the collection component 5 through the shunt tube 3, enters the puncture needle 53 through the spiral connector 52, and then enters the vacuum collection tube 54. When the blood is too thick, introduce the syringe 8 through the guiding block 48, so that the head of the syringe 8 drives the fixing block 43 to insert the needle body 44 above the sealing gasket 42. Push the pressing plate 474 at the top of the syringe 8 to drive the connecting block 473 to move by driving the connecting rod 472. The connecting block 473 synchronously drives the fixing block 43 to move, and then pull the syringe 8 to suck out the blood.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A double-loop blood collection needle, comprising a blood collection assembly (1), characterized in that: A butterfly positioning member (6) is fixedly installed at the top of the blood collection assembly (1). A venous needle (7) is fixedly connected inside the blood collection assembly (1). A drainage tube (2) is fixedly connected to the bottom of the blood collection assembly (1). The end of the drainage tube (2) is connected to a driving assembly (4). A shunt tube (3) is fixedly connected to the middle section of the drainage tube (2). The end of the shunt tube (3) is connected to a collection assembly (5).

2. The double-loop blood collection needle according to claim 1, wherein: The driving assembly (4) includes a connecting cylinder (41). The connecting cylinder (41) is fixed at the end of the drainage tube (2). A sealing gasket (42) is fixedly connected to the top of the connecting cylinder (41). The top of the sealing gasket (42) is fixedly connected to the end of the drainage tube (2). A main isolation plate (45) is fixedly connected inside the connecting cylinder (41). A secondary isolation plate (46) is fixedly connected inside the connecting cylinder (41) and below the main isolation plate (45). A pressing assembly (47) is fixedly connected to the top of the secondary isolation plate (46). A fixing block (43) is fixedly connected to the top of the pressing assembly (47). A needle body (44) is fixedly connected to the top of the fixing block (43).

3. The double-loop blood collection needle according to claim 2, characterized in that: The pressing assembly (47) includes a spring (471). The spring (471) is fixed to the top of the secondary isolation plate (46). The top of the spring (471) is fixedly connected to a connecting block (473). A connecting rod (472) is fixedly connected to the bottom of the connecting block (473) and inside the spring (471). The bottom end of the connecting rod (472) extends below the secondary isolation plate (46) and is fixedly connected to a pressing plate (474).

4. A double-loop blood collection needle according to claim 1, characterized in that: The blood collection assembly (1) includes an anti-backflow outer shell (11). The anti-backflow outer shell (11) is fixed to the top of the drainage tube (2). A guide rod (17) is fixedly connected inside the anti-backflow outer shell (11). A support plate (13) is slidably connected inside the anti-backflow outer shell (11). A conical block (15) is fixedly connected to the top of the support plate (13). A drainage plate (14) is fixedly connected to the bottom of the support plate (13). A fixing member (16) is fixedly connected to the top of the anti-backflow outer shell (11). The inside of the fixing member (16) is fixedly connected to the outside of the venous needle (7). A clamping block (12) is fixedly connected inside the anti-backflow outer shell (11).

5. The double-loop blood collection needle according to claim 1, characterized in that: The collection assembly (5) includes a spiral connecting piece (52). The spiral connecting piece (52) is fixed to the end of the shunt tube (3). A limiting outer shell (51) is threadedly connected to the outside of the spiral connecting piece (52). A puncture needle (53) is fixedly connected inside the spiral connecting piece (52). A vacuum collection tube (54) is arranged outside the puncture needle (53).

6. The double-loop blood collection needle according to claim 2, characterized in that: A guiding block (48) is fixedly connected to the bottom of the fixing block (43). The connecting cylinder (41) is connected to a syringe (8) through the guiding block (48).

7. A double-loop blood collection needle according to claim 4, characterized in that: An annular groove is formed at the top of the clamping block (12). The top end of the conical block (15) extends into the inside of the fixing member (16).

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