An auxiliary device for peripheral artery blood collection in newborns

Abstract

This invention belongs to the field of blood collection assistance technology, specifically referring to an auxiliary device for peripheral artery blood collection in newborns. It includes a collection tube, a spiral blood collection mechanism, and an auxiliary shaking and fixing mechanism. The spiral blood collection mechanism includes an adjustment component, a blood collection component, a flow guiding component, and a sample storage component. The adjustment component is located inside the collection tube, the blood collection component is located on the upper wall of the adjustment component, the flow guiding component is located at the bottom of the adjustment component, and the sample storage component is located at the bottom of the collection tube. This invention provides a neonatal peripheral artery blood collection auxiliary device that can achieve thorough mixing of blood and anticoagulant and improve blood mixing effect under the condition of a fixed anticoagulant ratio in the reservoir tube.

Description

Technical Field

[0001] This invention belongs to the field of blood collection assistance technology, specifically referring to an auxiliary device for peripheral artery blood collection in newborns. Background Technology

[0002] Newborns are a particularly vulnerable group in clinical practice. Their organ systems are not yet fully developed, their immune systems are weak, and their resistance to disease is significantly lower than that of other age groups. The health status of newborns directly determines their long-term quality of life and growth and development. To protect the health rights of newborns, current clinical guidelines require early screening for major diseases such as congenital metabolic disorders, hearing impairment, and genetic diseases after birth.

[0003] Current standard neonatal peripheral artery blood collection devices have significant limitations in their use: Existing blood collection auxiliary devices cannot achieve uniform mixing of blood and anticoagulant; the anticoagulant ratio inside the blood collection tube is fixed. If the amount of blood required for clinical use is too large, the uniformity of mixing between blood and anticoagulant will decrease significantly, and tiny blood clots will easily form inside the blood, directly interfering with the accuracy of subsequent blood sample test results. This cannot meet the current clinical needs for neonatal peripheral artery blood collection. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a neonatal peripheral artery blood collection auxiliary device that can achieve thorough mixing of blood and anticoagulant and improve the blood mixing effect under the condition of fixed anticoagulant ratio in the reservoir tube.

[0005] The technical solution adopted in this solution is as follows: This solution proposes an auxiliary device for peripheral artery blood collection in newborns, including a collection tube, a spiral blood collection mechanism, and an auxiliary shaking and fixing mechanism. The spiral blood collection mechanism includes an adjustment component, a blood collection component, a flow guiding component, and a sample storage component. The adjustment component is located inside the collection tube, the blood collection component is located on the upper wall of the adjustment component, the flow guiding component is located at the bottom of the adjustment component, and the sample storage component is located at the bottom of the collection tube. The auxiliary shaking and fixing mechanism includes a positioning component and a limiting component. The positioning component is located on the side wall of the collection tube, and the limiting component is located at the bottom of the positioning component.

[0006] As a further preferred embodiment of the present invention, the distance adjustment assembly includes a sliding cavity, a sliding block, an annular groove, and an annular rubber block. The sliding cavity is located on the inner wall of the collection cylinder, the sliding block is slidably disposed on the inner wall of the sliding cavity, the annular groove is located on the side wall of the sliding block, and the annular rubber block is disposed inside the annular groove and is in contact with the inner wall of the sliding cavity. The blood collection assembly includes a connector, a blood collection tube, and a blood collection needle. The connector is disposed through the upper wall of the sliding block, the blood collection tube is connected to the end of the connector away from the sliding block, and the blood collection needle is connected to the end of the blood collection tube away from the connector. The flow guiding assembly includes a flow guide and a spiral tube. The flow guide is connected to the bottom wall of the connector, and the spiral tube is connected to the bottom wall of the flow guide. The sample storage assembly includes an external thread, a threaded sleeve, and a liquid storage tube. The external thread is located on the bottom side wall of the collection cylinder, the threaded sleeve is located outside the external thread and is threadedly connected to the external thread, and the liquid storage tube is connected to the bottom wall of the threaded sleeve.

[0007] In its initial factory condition, the sliding block, annular rubber block, connector, blood collection tube, blood collection needle, flow guide, spiral tube, threaded sleeve, and liquid storage tube are sealed and stored in an independent medical packaging bag; the threaded sleeve and liquid storage tube are integrally molded structures, while the sliding block, annular rubber block, connector, blood collection tube, blood collection needle, flow guide, and spiral tube are another set of integrally molded components.

[0008] During clinical blood collection, medical staff remove the entire set of consumables from the packaging bag and assemble them into the collection tube. The sliding block, along with the annular rubber block, slides into the collection tube along the sliding cavity to complete the pre-assembly. The reservoir tube is fixed by screwing the threaded sleeve into the external threaded section at the bottom of the collection tube. After assembly, the spiral tube and the reservoir tube are arranged vertically and coaxially. The outer wall of the reservoir tube is printed with a volume scale in milliliters. Medical staff can slide the sliding block up and down along the sliding cavity to adjust the height of the sliding block so that the bottom of the spiral tube is flush with the target blood collection volume scale, preventing the spiral tube opening from being submerged below the blood surface during blood collection. Medical staff insert a blood collection needle into the skin of the newborn's peripheral artery to complete the blood collection. The outlet end of the spiral tube is located in the center of the reservoir tube. Blood flows into the blood collection tube through the blood collection needle, and then passes through the connector and the flow guide into the spiral tube. When the blood flows downward along the spiral tube, it forms a rotating flow field. When it falls into the reservoir tube, it relies on the fluid rotation inertia to achieve self-mixing, which reduces the probability of small blood clots caused by uneven mixing of blood and anticoagulant to a certain extent.

[0009] Preferably, the positioning component includes an annular block, a rotating shaft, and a handheld bracket. The annular block is located on the outer side of the middle of the collection tube, the rotating shaft is symmetrically located on both sides of the annular block, and the handheld bracket is located on the side of the rotating shaft away from the annular block. The limiting component includes a limiting block and a limiting cavity. The limiting block is located on the bottom wall of the handheld bracket, the limiting cavity is located on the inner wall of the limiting block, and the limiting cavity is located on the outer side of the liquid storage tube.

[0010] In clinical use, medical staff hold the handheld frame with one hand to secure the entire device. For newborns with larger body weights, the required blood volume needs to be increased accordingly. Assuming a fixed anticoagulant ratio, the higher the blood volume, the greater the risk of microclots forming. After blood collection and removal of the reservoir tube, medical staff can hold the reservoir tube inside the limiting cavity and gently shake it. The limiting cavity restricts the amplitude of the shaking, preventing violent vibrations that could damage blood cells, and further assists in the thorough mixing of blood and anticoagulant.

[0011] Specifically, the inner wall of the spiral tube is coated with an anticoagulant.

[0012] The annular rubber block fits against the inner wall of the sliding cavity, increasing the sliding resistance between the sliding block and the inner wall of the sliding cavity, thereby achieving height positioning of the sliding block.

[0013] Furthermore, the sliding block, annular rubber block, connector, blood collection tube, blood collection needle, flow guide, spiral tube, threaded sleeve, and liquid storage tube are all disposable items.

[0014] For the case of micro-blood collection from newborns, a spiral tube with an inner diameter of 0.44 mm is selected, and the shear force generated by the blood flowing through the tube is controlled within 10 dynes / cm².

[0015] The beneficial effects achieved by this solution using the above structure are as follows: Compared to existing conventional blood collection auxiliary devices, this invention adopts a combination structure of a spiral blood collection mechanism and an auxiliary shaking and fixing mechanism. Through the coordinated operation of the distance adjustment component, blood collection component, flow guiding component, sample storage component, positioning component, and limiting component, the blood flows through the spiral tube and rotates and mixes autonomously in the storage tube due to fluid inertia. For neonatal blood collection scenarios with large blood volumes, it can significantly improve the uniformity of blood and anticoagulant mixing and reduce the probability of micro-clot formation. At the same time, the limiting cavity constrains the shaking amplitude of the storage tube, allowing medical staff to gently shake the blood sample, thus balancing the accuracy of neonatal blood sample testing and the efficiency of blood collection operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this solution; Figure 2 This is the front perspective stereoscopic view of this solution; Figure 3 This is a schematic diagram of the combined structure of the sampling tube and the auxiliary shaking and fixing mechanism in this scheme; Figure 4 This is a schematic diagram of the structure of the sample storage component in this solution; Figure 5 This is a schematic diagram of the internal structure of this solution; Figure 6 This is the main view of this solution; Figure 7This is a side view of the design. Figure 8 This is a top view of the plan; Figure 9 for Figure 8 Sectional view of AA section.

[0017] Among them, 1. Collection tube, 2. Spiral blood collection mechanism, 3. Adjustment component, 4. Sliding cavity, 5. Sliding block, 6. Blood collection component, 7. Connector, 8. Blood collection tube, 9. Blood collection needle, 10. Flow guiding component, 11. Flow guide, 12. Spiral tube, 13. Sample storage component, 14. External thread, 15. Threaded sleeve, 16. Liquid storage tube, 17. Auxiliary shaking and fixing mechanism, 18. Positioning component, 19. Annular block, 20. Rotating shaft, 21. Handheld frame, 22. Limiting component, 23. Limiting block, 24. Limiting cavity, 25. Annular groove, 26. Annular rubber block.

[0018] The accompanying drawings are provided to further understand the present solution and form part of the specification. They are used together with the embodiments of the present solution to explain the present solution and do not constitute a limitation thereof. Detailed Implementation

[0019] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this solution, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this solution without creative effort are within the scope of protection of this solution.

[0020] In the description of this solution, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this solution.

[0021] like Figures 1-9As shown, this solution proposes an auxiliary device for peripheral artery blood collection in newborns, comprising a collection tube 1, a spiral blood collection mechanism 2, and an auxiliary shaking and fixing mechanism 17. The spiral blood collection mechanism 2 includes a distance adjustment component 3, a blood collection component 6, a flow guiding component 10, and a sample storage component 13. The distance adjustment component 3 is located inside the collection tube 1, the blood collection component 6 is located on the upper wall of the distance adjustment component 3, the flow guiding component 10 is located at the bottom of the distance adjustment component 3, and the sample storage component 13 is located at the bottom of the collection tube 1. The auxiliary shaking and fixing mechanism 17 includes a positioning component 18 and a limiting component 22. The positioning component 18 is located on the side wall of the collection tube 1, and the limiting component 22 is located at the bottom of the positioning component 18.

[0022] The distance adjustment assembly 3 includes a sliding cavity 4, a sliding block 5, an annular groove 25, and an annular rubber block 26. The sliding cavity 4 is disposed on the inner wall of the collection cylinder 1. The sliding block 5 is slidably disposed on the inner wall of the sliding cavity 4. The annular groove 25 is disposed on the side wall of the sliding block 5. The annular rubber block 26 is disposed inside the annular groove 25 and is in contact with the inner wall of the sliding cavity 4. The blood collection assembly 6 includes a connector 7, a blood collection tube 8, and a blood collection needle 9. The connector 7 is disposed through the upper wall of the sliding block 5. The blood collection tube 8 is connected to the end of the connector 7 away from the sliding block 5. The blood collection needle 9 is connected to the end of the blood collection tube 8 away from the connector 7; the flow guiding assembly 10 includes a flow guide 11 and a spiral tube 12, the flow guide 11 is connected to the bottom wall of the connector 7, and the spiral tube 12 is connected to the bottom wall of the flow guide 11; the sample storage assembly 13 includes an external thread 14, a threaded sleeve 15, and a liquid storage tube 16, the external thread 14 is located on the bottom side wall of the collection tube 1, the threaded sleeve 15 is located outside the external thread 14, and the threaded sleeve 15 is threadedly connected to the external thread 14, and the liquid storage tube 16 is connected to the bottom wall of the threaded sleeve 15.

[0023] The positioning component 18 includes an annular block 19, a rotating shaft 20, and a handheld bracket 21. The annular block 19 is located on the outer side of the middle of the collection tube 1. The rotating shaft 20 is symmetrically located on both sides of the annular block 19. The handheld bracket 21 is located on the side of the rotating shaft 20 away from the annular block 19. The limiting component 22 includes a limiting block 23 and a limiting cavity 24. The limiting block 23 is located on the bottom wall of the handheld bracket 21. The limiting cavity 24 is located on the inner wall of the limiting block 23 and is located outside the liquid storage tube 16.

[0024] The inner wall of the spiral tube 12 is coated with an anticoagulant to reduce shear force and decrease blood cell damage and coagulation.

[0025] The annular rubber block 26 fits against the inner wall of the sliding cavity 4, increasing the sliding resistance of the sliding block 5 along the inner wall of the sliding cavity 4, thereby achieving the positioning of the height of the sliding block 5.

[0026] The sliding block 5, annular rubber block 26, connector 7, blood collection tube 8, blood collection needle 9, flow guide 11, spiral tube 12, threaded sleeve 15 and liquid storage tube 16 are all disposable items.

[0027] In actual use, in the initial state after leaving the factory, the sliding block 5, annular rubber block 26, connector 7, blood collection tube 8, blood collection needle 9, flow guide 11, spiral tube 12, threaded sleeve 15, and liquid storage tube 16 are all sealed and stored in an independent medical packaging bag; the threaded sleeve 15 and the liquid storage tube 16 are integrally injection molded, while the sliding block 5, annular rubber block 26, connector 7, blood collection tube 8, blood collection needle 9, flow guide 11, and spiral tube 12 are another set of integrally molded parts; When collecting micro-blood samples from newborns, a spiral tube with an inner diameter of 0.44 mm is used, and the shear force is less than 10 dyne / cm². During clinical blood collection, medical staff hold the handheld frame 21 and fix the entire device with one hand; take the entire set of consumables out of the packaging bag and assemble it into the collection tube 1. The sliding block 5, together with the annular rubber block 26, slides into the collection tube 1 along the sliding cavity 4. The original outer diameter of the annular rubber block 26 is slightly larger than the inner diameter of the sliding cavity 4. After being installed, the rubber block is compressed and deformed to its original position. It relies on its own elasticity to generate friction with the inner wall of the sliding cavity 4 to lock the assembly height of the sliding block 5. The threaded sleeve 15 and the liquid storage tube 16 are passed through the limiting cavity 24 and screwed into the external thread section 14 at the bottom of the collection tube 1 for fixation. After assembly, the spiral tube 12 and the liquid storage tube 16 are vertically coaxial and the outer wall of the liquid storage tube 16 is printed with a capacity scale. Medical staff adjust the height of the sliding block 5 up and down along the sliding cavity 4 so that the bottom end of the spiral tube 12 is flush with the target blood collection capacity scale to prevent the spiral tube opening from immersing into the blood surface during blood collection. Medical staff will insert the lancet 9 into the newborn's skin to collect peripheral artery blood. For newborns within 28 days of birth, if the infant is overweight, the amount of blood required will be increased accordingly. Collecting a sufficient amount of blood in a single blood collection takes 3 to 6 minutes. Under the condition of fixed anticoagulant ratio, the larger the amount of blood collected, the higher the risk of forming micro-blood clots in the blood. During blood collection, the outlet end of the spiral tube 12 is located at the center of the reservoir tube 16. Blood enters the blood collection tube 8 through the blood collection needle 9, and flows into the spiral tube 12 through the connector 7 and the guide 11 in sequence. The blood flows downward along the spiral tube to form a rotating fluid. After falling into the reservoir tube 16, it continues to rotate due to the angular momentum of the fluid. The blood comes into full contact with and mixes with the anticoagulant pre-stored in the reservoir tube. The rotating and falling blood hits the wall of the reservoir tube. The fluid impact force and viscosity force cause the reservoir tube 16 and the collection tube 1 to swing slightly along the rotating shaft 20. The larger the blood volume, the more obvious the swing amplitude, which helps to mix the blood. Furthermore, medical staff can push and shake the reservoir tube 16 with their fingers. The reservoir tube 16 shakes the blood slightly inside the limiting cavity 24. The limiting cavity 24 achieves gentle shaking and avoids violent vibration, which helps to mix the blood with the anticoagulant, thereby effectively preventing the formation of tiny blood clots in the blood and ensuring the accuracy of subsequent blood sample test results. After the blood collection operation is completed, unscrew the threaded sleeve 16 along with the liquid storage tube 15 from the external thread section 14; then pull out the sliding block 5, annular rubber block 26, connector 7, blood collection tube 8, blood collection needle 9, flow guide 11, and spiral tube 12 as a whole from the sliding cavity 4, and put all disposable consumables into the medical waste bin; medical staff use the matching sealing stopper to seal the bottom opening of the liquid storage tube 16 to complete the blood sample sealing and preservation, and the neonatal blood collection operation is completed; for the next blood collection, replace with brand new disposable consumables and repeat the above operation.

[0028] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] The present solution and its implementation methods have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present solution; the actual structure is not limited to this. In conclusion, if a person skilled in the art, inspired by this description, designs a similar structure and embodiment without departing from the inventive intent of this solution, such design should fall within the protection scope of this solution.

Claims

1. An auxiliary device for peripheral artery blood collection in newborns, comprising a collection tube, characterized in that: It also includes a spiral blood collection mechanism and an auxiliary shaking and fixing mechanism. The spiral blood collection mechanism includes an adjustment component, a blood collection component, a flow guiding component, and a sample storage component. The adjustment component is located inside the collection tube, the blood collection component is located on the upper wall of the adjustment component, the flow guiding component is located at the bottom of the adjustment component, and the sample storage component is located at the bottom of the collection tube. The auxiliary shaking and fixing mechanism includes a positioning component and a limiting component. The positioning component is located on the side wall of the collection tube, and the limiting component is located at the bottom of the positioning component. The distance adjustment assembly includes a sliding cavity, a sliding block, an annular groove, and an annular rubber block. The sliding cavity is located on the inner wall of the collection tube, the sliding block is slidably located on the inner wall of the sliding cavity, the annular groove is located on the side wall of the sliding block, and the annular rubber block is located inside the annular groove and is in contact with the inner wall of the sliding cavity. The blood collection assembly includes a connector; The flow guiding assembly includes a flow guide and a spiral tube. The flow guide is connected to the bottom wall of the connector, and the spiral tube is connected to the bottom wall of the flow guide.

2. The auxiliary device for peripheral artery blood collection in newborns according to claim 1, characterized in that: The blood collection assembly also includes a blood collection tube and a blood collection needle. The connector is disposed through the upper wall of the sliding block. The blood collection tube is connected to the end of the connector away from the sliding block, and the blood collection needle is connected to the end of the blood collection tube away from the connector.

3. The auxiliary device for peripheral artery blood collection in newborns according to claim 1, characterized in that: The sample storage assembly includes an external thread, a threaded sleeve, and a liquid storage tube. The external thread is located on the bottom side wall of the collection tube, the threaded sleeve is located outside the external thread and is threadedly connected to the external thread, and the liquid storage tube is connected to the bottom wall of the threaded sleeve.

4. The auxiliary device for peripheral artery blood collection in newborns according to claim 1, characterized in that: The positioning component includes an annular block, a rotating shaft, and a handheld bracket. The annular block is located on the outer side of the middle of the collection tube, the rotating shaft is symmetrically located on both sides of the annular block, and the handheld bracket is located on the side of the rotating shaft away from the annular block.

5. An auxiliary device for peripheral artery blood collection in newborns according to claim 4, characterized in that: The limiting component includes a limiting block and a limiting cavity. The limiting block is located on the bottom wall of the handheld frame, and the limiting cavity is located on the inner wall of the limiting block, with the limiting cavity situated outside the liquid storage tube.

6. The auxiliary device for peripheral artery blood collection in newborns according to claim 1, characterized in that: The annular rubber block fits into the inner wall of the sliding cavity, increasing the sliding resistance between the sliding block and the inner wall of the sliding cavity, thereby achieving height positioning of the sliding block.

7. An auxiliary device for peripheral artery blood collection in newborns according to claim 1, characterized in that: For the scenario of micro-blood collection from newborns, a spiral tube with an inner diameter of 0.44 mm is selected, and the shear force generated by the blood flowing through the tube is controlled within 10 dynes / cm².

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