Plasma extraction device used after blood separation
By designing an automated plasma extraction device, which utilizes a syringe clamp and a needle calibration unit to achieve automatic plasma extraction, the problems of time-consuming, labor-intensive, and contamination associated with manual extraction are solved, thus improving efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-12
- Publication Date
- 2026-03-17
AI Technical Summary
Existing serum separation tubes require manual operation when drawing plasma, which is time-consuming, labor-intensive, and prone to contamination.
Design a plasma extraction device that includes a carrier and an extraction component. The device uses a syringe barrel clamping part to hold the syringe barrel, a needle calibration part to calibrate the needle, a moving part to insert a blood sample tube, and a pulling part to extract plasma, thus achieving automated operation.
This reduces the steps involved in manually extracting plasma, improves operational efficiency, and lowers the risk of plasma contamination.
Smart Images
Figure CN223995467U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of blood collection technology, and more specifically, to a device for extracting plasma after blood separation. Background Technology
[0002] In existing serum separation tubes, after blood samples are drawn and separated using a centrifuge, the blood samples separate into layers within the tube, from top to bottom: plasma, platelets and white blood cells, and red blood cells. The plasma layer is the first layer, and a sampling needle can be inserted into it for extraction.
[0003] In existing technologies, plasma needs to be drawn manually by laboratory technicians. This manual method is time-consuming, labor-intensive, and prone to contamination. How to solve these technical problems is a question that those skilled in the art need to consider. Utility Model Content
[0004] This application provides a plasma extraction device for blood separation to address the problem of reducing manual plasma extraction.
[0005] This application provides a plasma extraction device for blood separation, including a carrier and an extraction assembly. The carrier is used to hold the separated blood sample tube. The extraction assembly includes a movable member, a clamping member, and a pulling member. The movable member is movably disposed above the carrier in a vertical direction. The clamping member includes a syringe clamping part and a needle calibration part. The syringe clamping part is movably disposed on the movable member. The needle calibration part is connected to the syringe clamping part and is used to clamp the syringe barrel and move the needle calibration part to the circumferential surface corresponding to the needle of the syringe. The movable member moves the clamping member so that the needle is inserted into the blood sample tube. The pulling member is detachably connected to the pull rod of the syringe and is used to move the pull rod to extract plasma from the blood sample tube.
[0006] Compared to existing technologies, the plasma extraction device for blood separation provided in this embodiment uses a syringe clamping part to hold the syringe barrel and move the needle calibration part to the circumference of the corresponding syringe needle. The needle calibration part is used to calibrate the syringe needle so that the needle is aligned with the blood sample tube. The moving part moves the clamping part so that the needle is inserted into the appropriate position of the blood sample tube. The pulling part is used to drive the pull rod to move to extract plasma from the blood sample tube. Thus, the plasma extraction device for blood separation automatically completes the plasma extraction operation, thereby reducing the need for manual plasma extraction.
[0007] In one possible implementation, the syringe clamping part includes a first clamping block and a second clamping block, which are respectively movably connected to the movable member. The first clamping block has a first groove, and the second clamping block has a second groove. The first groove and the second groove are disposed opposite to each other and are used to correspond to the circumferential surface of the syringe barrel. The first clamping block and the second clamping block move closer to each other to clamp the syringe barrel, or move further apart to release the syringe barrel.
[0008] In one possible implementation, the needle calibration unit includes a first jaw and a second jaw, the first jaw and the second jaw are disposed opposite to each other, the first jaw is connected to a first clamping block, the first jaw extends from the first clamping block to the needle, the second jaw is connected to a second clamping block, and the second jaw extends from the second clamping block to the needle.
[0009] In one possible implementation, the first jaw has a first clamping head, the second jaw has a second clamping head, the first clamping head and the second clamping head are spaced apart in a vertical direction, and when the first clamping block and the second clamping block clamp the syringe, the needle is located between the first clamping head and the second clamping head.
[0010] In one possible implementation, the plasma extraction device for blood separation further includes a camera assembly. The carrier has a placement groove and a through hole. The placement groove corresponds to the clamping member in the vertical direction and is used to place the blood sample tube. The through hole is located at the bottom of the placement groove and communicates with the placement groove in the horizontal direction. The camera assembly corresponds to the through hole in the horizontal direction and is used to capture the position of the plasma in the blood sample tube. The moving member moves the clamping member according to the position of the plasma so that the needle is inserted into the plasma in the blood sample tube.
[0011] In one possible implementation, the extraction assembly further includes a first guide rail and a first sensor. The first guide rail extends vertically, the first sensor is fixedly connected to the first guide rail, and the first guide rail is movably connected to the moving member in a vertical direction. The first sensor is used to correspond with the moving member and emit a first sensing signal when the moving member moves to a position close to the blood sample tube. The moving member decelerates according to the first sensing signal and slowly moves the clamping member to the position of the blood sample tube according to the position of the plasma.
[0012] In one possible implementation, the extraction assembly further includes a second sensor located at a position away from the blood sample tube by the first sensor. The second sensor is fixedly connected to the first guide rail. The second sensor is used to correspond with the moving member and emit a second sensing signal when the moving member moves to a position away from the blood sample tube. The moving member stops according to the second sensing signal.
[0013] In one possible implementation, the pull-out component includes a pull-out block with a T-slot. The T-slot has an opening in the horizontal direction, which corresponds to the pull rod of the syringe so that the pull rod can be engaged into the T-slot in the horizontal direction. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a perspective view of a plasma extraction device for blood separation according to an embodiment of this application;
[0016] Figure 2 for Figure 1 Left view of the device used for plasma extraction after blood separation;
[0017] Figure 3 for Figure 1 A partial enlarged view of region A of the plasma extraction device used after blood separation;
[0018] Figure 4 for Figure 1 A schematic diagram of some parts of a plasma extraction device used after blood separation.
[0019] Explanation of key component symbols:
[0020] 1. A device for extracting plasma after blood separation; 11. A support member; 111. A support platform; 112. A placement groove; 113. A through hole; 12. An extraction assembly; 121. A moving part; 1211. A horizontal slide rail; 1212. A slider; 122. A clamping member; 123. A syringe clamping part; 124. A first clamping block; 1241. A first groove; 125. A second clamping block; 1251. A second groove; 126. A needle. Calibration section; 127, First jaw; 1271, First jaw head; 128, Second jaw; 1281, Second jaw head; 129, Pull-out component; 1291, Pull-out block; 1292, T-slot; 13, First guide rail; 14, First sensor; 15, Second sensor; 16, Camera assembly; 17, Vertical direction; 2, Blood sample tube; 21, Plasma; 3, Syringe; 31, Syringe; 32, Needle; 33, Pull rod. Detailed Implementation
[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.
[0022] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0023] Example
[0024] Please see Figures 1 to 4 As shown, this embodiment provides a plasma extraction device 1 for blood separation, including a carrier 11 and an extraction assembly 12. The carrier 11 is used to hold the separated blood sample tube 2. The extraction assembly 12 includes a movable member 121, a clamping member 122, and a pulling member 129. The movable member 121 is movably disposed above the support member 11 along the vertical direction 17. The clamping member 122 includes a syringe clamping part 123 and a needle calibration part 126. The syringe clamping part 123 is movably disposed on the movable member 121. The needle calibration part 126 is connected to the syringe clamping part 123. The syringe clamping part 123 is used to clamp the syringe 31 of the syringe 3 and drive the needle calibration part 126 to move to the circumference of the corresponding needle 32 of the syringe 3. The movable member 121 moves the clamping member 122 so that the needle 32 is inserted into the blood sample tube 2. The pulling member 129 is detachably connected to the pull rod 33 of the syringe 3. The pulling member 129 is used to drive the pull rod 33 to move to extract the plasma 21 from the blood sample tube 2.
[0025] The plasma extraction device 1 provided in this embodiment for blood separation clamps the syringe 31 of the syringe 3 with the syringe clamping part 123 and drives the needle calibration part 126 to move to the circumference of the corresponding needle 32 of the syringe 3. The needle calibration part 126 is used to calibrate the needle 32 of the syringe 3 so that the needle 32 is aligned with the blood sample tube 2. The moving part 121 moves the clamping part 122 so that the needle 32 is inserted into the appropriate position of the blood sample tube 2. The pulling part 129 is used to drive the pull rod 33 to move to extract the plasma 21 from the blood sample tube 2. Thus, the plasma extraction device 1 for blood separation completes the operation of automatically extracting plasma 21, so as to reduce the manual extraction of plasma 21.
[0026] In this embodiment, the syringe 3 includes a syringe 31, a needle 32, and a pull rod 33. Plasma 21 is located at the upper part of the blood sample tube 2.
[0027] The syringe 3 is moved to the pull-out member 129 by a robotic arm. The robotic arm connects the pull rod 33 of the syringe 3 to the pull-out member 129, suspending the syringe 3 in the pull-out member 129. Then, the syringe barrel clamping part 123 clamps the syringe barrel 31 to fix the syringe 3. The syringe barrel clamping part 123 drives the needle calibration part 126 to move to the circumference of the corresponding needle 32. The needle calibration part 126 clamps the needle 32 so that the needle 32 is aligned with the blood sample tube 2. The moving part 121 moves the clamping part 122 so that the needle 32 is inserted into the plasma 21 position of the blood sample tube 2. The pull-out member 129 pulls the pull rod 33 to draw the plasma 21 from the blood sample tube 2. Thus, the plasma extraction device 1 used for blood separation completes the automatic extraction of plasma 21, reducing manual extraction of plasma 21, which helps improve work efficiency and reduce plasma 21 contamination.
[0028] In one possible implementation, the plasma extraction device 1 for blood separation further includes a camera assembly 16. The carrier 11 has a placement groove 112 and a through hole 113. The placement groove 112 is aligned with the clamping member 122 along the vertical direction 17 and is used to place the blood sample tube 2. The through hole 113 is located at the bottom of the placement groove 112 and is connected to the placement groove 112 along the horizontal direction. The camera assembly 16 is aligned with the through hole 113 along the horizontal direction and is used to capture the position of the plasma 21 in the blood sample tube 2. The moving member 121 moves the clamping member 122 according to the position of the plasma 21 so that the needle 32 is inserted into the plasma 21 in the blood sample tube 2.
[0029] In this embodiment, the carrier 11 includes a carrier platform 111. A placement groove 112 is provided on the surface of the carrier platform 111 near the clamping member 122. The placement groove 112 extends along the vertical direction 17, and the blood sample tube 2 is placed in the placement groove 112 along the vertical direction 17. A through hole 113 communicates with the bottom of the placement groove 112, so that the camera assembly 16 can observe the plasma 21 in the blood sample tube 2 through the through hole 113. The camera assembly 16 captures the position of the plasma 21 in the blood sample tube 2. The camera assembly 16 is communicatively connected to the moving member 121. The camera assembly 16 converts the captured image of the plasma 21 position into position coordinates and provides them to the moving member 121. The moving member 121 then moves the clamping member 122 according to the position of the plasma 21, so that the needle 32 is inserted into the plasma 21 in the blood sample tube 2. Thus, the plasma extraction device 1 used for blood separation automatically completes the operation of extracting plasma 21, thereby reducing manual extraction of plasma 21, which helps to improve work efficiency and reduce plasma 21 contamination.
[0030] In one possible implementation, the syringe clamping part 123 includes a first clamping block 124 and a second clamping block 125. The first clamping block 124 and the second clamping block 125 are respectively movably connected to the moving member 121. The first clamping block 124 is provided with a first groove 1241, and the second clamping block 125 is provided with a second groove 1251. The first groove 1241 and the second groove 1251 are arranged opposite to each other. The first groove 1241 and the second groove 1251 are used to correspond to the circumferential surface of the syringe 31 of the syringe 3. The first clamping block 124 and the second clamping block 125 move closer to each other to clamp the syringe 31, or move further away from each other to release the syringe 31.
[0031] In this embodiment, the movable component 121 includes a slider 1212 and a horizontal slide rail 1211. The slider 1212 is driven by a motor and moves along the vertical direction 17. The horizontal slide rail 1211 is fixedly connected to the slider 1212 and extends horizontally. The first clamping block 124 and the second clamping block 125 are respectively movably connected to the horizontal slide rail 1211 along the horizontal direction. The slider 1212 drives the horizontal slide rail 1211 to move along the vertical direction 17, thereby the horizontal slide rail 1211 drives the first clamping block 124 and the second clamping block 125 to adjust their height along the vertical direction 17. The first clamping block 124 and the second clamping block 125 are respectively driven by a motor, and the first clamping block 124 and the second clamping block 125 move closer to or further away from each other along the horizontal direction.
[0032] In one possible implementation, the needle calibration unit 126 includes a first claw 127 and a second claw 128, the first claw 127 and the second claw 128 are disposed opposite to each other, the first claw 127 is connected to a first clamping block 124 and extends from the first clamping block 124 to the needle 32, the second claw 128 is connected to a second clamping block 125 and extends from the second clamping block 125 to the needle 32.
[0033] In this embodiment, the first claw 127 is located at the end of the first clamping block 124 away from the first groove 1241, and the second claw 128 is located at the end of the second clamping block 125 away from the second groove 1251. The first claw 127 and the second claw 128 are used to clamp the needle 32 to calibrate the needle 32 so that the needle 32 is aligned with the blood sample tube 2.
[0034] In one possible implementation, the first jaw 127 has a first jaw head 1271, and the second jaw 128 has a second jaw head 1281. The first jaw head 1271 and the second jaw head 1281 are spaced apart along the vertical direction 17. When the first clamping block 124 and the second clamping block 125 clamp the syringe 31, the needle 32 is located between the first jaw head 1271 and the second jaw head 1281.
[0035] In this embodiment, a first V-shaped groove is formed in the surface of the first clamping head 1271 near the second clamping claw 128, and a second V-shaped groove is formed in the surface of the second clamping head 1281 near the first clamping claw 127. The openings of the first V-shaped groove and the second V-shaped groove are arranged opposite to each other. When the first clamping block 124 and the second clamping block 125 approach each other in the horizontal direction, the needle 32 is located between the first V-shaped groove and the second V-shaped groove. One side of the needle 32 is in contact with the first clamping head 1271 and the other side is in contact with the second clamping claw 128, so that the needle 32 is aligned with the blood sample tube 2.
[0036] In one possible implementation, the extraction assembly 12 further includes a first guide rail 13 and a first sensor 14. The first guide rail 13 extends along the vertical direction 17, and the first sensor 14 is fixedly connected to the first guide rail 13. The first guide rail 13 is movably connected to the moving member 121 along the vertical direction 17. The first sensor 14 is used to correspond with the moving member 121 and emit a first sensing signal when the moving member 121 moves to a position close to the blood sample tube 2. The moving member 121 decelerates according to the first sensing signal and slowly moves the clamping member 122 to the position of the blood sample tube 2 at the position of the blood plasma 21 according to the position of the blood plasma 21.
[0037] In this embodiment, the first sensing element 14 includes a first proximity switch. The slider 1212 is movably connected to the first guide rail 13 along the vertical direction 17. When the slider 1212 moves the first clamping block 124 and the second clamping block 125 closer to the blood sample tube 2, the needle 32 is positioned above the blood sample tube 2. At this time, the first sensing element 14 corresponds to the slider 1212, and the first sensing element 14 sends a first sensing signal to the motor controlling the movement of the slider 1212, causing the slider 1212 to decelerate. Based on the position of the plasma 21 in the blood sample tube 2 captured by the camera assembly 16, the motor controls the slider 1212 to slowly move the needle 32 to the position of the plasma 21 in the blood sample tube 2, so as to accurately extract the plasma 21 from the blood sample tube 2.
[0038] In one possible implementation, the extraction component 12 further includes a second sensor 15, which is located at a position away from the blood sample tube 2 by the first sensor 14. The second sensor 15 is fixedly connected to the first guide rail 13. The second sensor 15 is used to correspond with the moving component 121 and emit a second sensing signal when the moving component 121 moves to a position away from the blood sample tube 2. The moving component 121 stops according to the second sensing signal.
[0039] In this embodiment, the second sensing element 15 includes a second proximity switch, which is spaced apart from the first proximity switch along the vertical direction 17. Understandably, the second sensing element 15 is used to sense the position of the moving element 121 when it moves to the top of the first guide rail 13, and the first sensing element 14 is used to sense the position of the moving element 121 when it moves to the bottom of the first guide rail 13, thereby improving the positional accuracy of the moving element 121 along the vertical direction 17. This is beneficial to the positional accuracy of the moving element 121.
[0040] In one possible implementation, the pull-out member 129 includes a pull-out block 1291, the pull-out block 1291 is provided with a T-slot 1292, the T-slot 1292 is provided with an opening in the horizontal direction, the opening is used to correspond with the pull rod 33 of the syringe 3 so that the pull rod 33 can be inserted into the T-slot 1292 in the horizontal direction.
[0041] In this embodiment, the T-slot 1292 extends horizontally, and the pull rod 33 of the syringe 3 enters the T-slot 1292 horizontally to connect with the pull block 1291, or exits the T-slot 1292 to separate from the pull block 1291.
[0042] In summary, the plasma extraction device 1 for blood separation provided in this embodiment clamps the syringe 31 of the syringe 3 with the syringe clamping part 123 and drives the needle calibration part 126 to move to the circumference of the corresponding needle 32 of the syringe 3. The needle calibration part 126 is used to calibrate the needle 32 of the syringe 3 so that the needle 32 is aligned with the blood sample tube 2. The moving part 121 moves the clamping part 122 so that the needle 32 is inserted into the appropriate position of the blood sample tube 2. The pulling part 129 is used to drive the pull rod 33 to move to extract the plasma 21 from the blood sample tube 2. Thus, the plasma extraction device 1 for blood separation completes the operation of automatically extracting plasma 21, so as to reduce the manual extraction of plasma 21.
[0043] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.
Claims
1. A plasma extraction device for use after blood separation, characterized in that The device comprises: a carrier for placing the separated blood sample tube; an extraction assembly comprising a moving part, a clamping part and a pulling part, the moving part is movably arranged above the carrier in the vertical direction, the clamping part comprises a syringe clamping portion and a needle alignment portion, the syringe clamping portion is movably arranged on the moving part, the needle alignment portion is connected with the syringe clamping portion, the syringe clamping portion is used for clamping the syringe barrel and moving the needle alignment portion to the circumferential surface corresponding to the needle of the syringe, the moving part moves the clamping part so that the needle is inserted into the blood sample tube, the pulling part is detachably connected with the pull rod of the syringe, and the pulling part is used to move the pull rod to extract the plasma of the blood sample tube.
2. The device for extracting plasma after blood separation according to claim 1, wherein: the syringe clamping portion comprises a first clamping block and a second clamping block, the first clamping block and the second clamping block are movably connected with the moving part respectively, the first clamping block is provided with a first groove, the second clamping block is provided with a second groove, the first groove and the second groove are oppositely arranged, the first groove and the second groove are used for corresponding to the circumferential surface of the syringe barrel, and the first clamping block and the second clamping block are close to each other to clamp the syringe barrel or are away from each other to release the syringe barrel.
3. The device for extracting plasma after blood separation according to claim 2, wherein: the needle alignment portion comprises a first claw and a second claw, the first claw and the second claw are oppositely arranged, the first claw is connected with the first clamping block, the first claw extends from the first clamping block to the needle, the second claw is connected with the second clamping block, and the second claw extends from the second clamping block to the needle.
4. The device for extracting plasma after blood separation according to claim 3, wherein: the first claw has a first clamping head, the second claw has a second clamping head, the first clamping head and the second clamping head are spaced apart in the vertical direction, and when the first clamping block and the second clamping block clamp the syringe barrel, the needle is located between the first clamping head and the second clamping head.
5. The device for extracting plasma after blood separation according to claim 1, wherein: the device for extracting plasma after blood separation further comprises a camera assembly, the carrier is provided with a placing groove and a through hole, the placing groove corresponds to the clamping part in the vertical direction, the placing groove is used for placing the blood sample tube, the through hole is arranged at the bottom of the placing groove, the through hole is communicated with the placing groove in the horizontal direction, the camera assembly corresponds to the through hole in the horizontal direction, and the camera assembly is used for shooting the position of the plasma of the blood sample tube.
6. The device for extracting plasma after blood separation according to claim 5, wherein: The extraction assembly further comprises a first guide rail and a first sensing member, the first guide rail extends along a vertical direction, the first sensing member is fixedly connected with the first guide rail, the first guide rail is movably connected with the moving member along the vertical direction, the first sensing member is used for corresponding with the moving member when the moving member moves to a position close to the blood sample tube and emitting a first sensing signal, the moving member slows down according to the first sensing signal, and the clamping member slowly moves to the plasma position of the blood sample tube according to the position of the plasma.
7. The device for extracting plasma after blood separation according to claim 6, wherein: The extraction assembly further comprises a second sensing member, the second sensing member is arranged at a position away from the blood sample tube relative to the first sensing member, the second sensing member is fixedly connected with the first guide rail, the second sensing member is used for corresponding with the moving member when the moving member moves to a position away from the blood sample tube and emitting a second sensing signal, and the moving member stops according to the second sensing signal.
8. The device for extracting plasma after blood separation according to claim 1, wherein: The pulling member comprises a pulling block, the pulling block is provided with a T-shaped slot, the T-shaped slot is provided with an opening along a horizontal direction, and the opening is used for corresponding with the pull rod of the syringe so that the pull rod can be clamped into the T-shaped slot along the horizontal direction.