CN111957364B - Double-tube single-quantitative blood sampling pipette and blood sampling pipetting method thereof - Google Patents
Double-tube single-quantitative blood sampling pipette and blood sampling pipetting method thereof Download PDFInfo
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- CN111957364B CN111957364B CN202010853151.7A CN202010853151A CN111957364B CN 111957364 B CN111957364 B CN 111957364B CN 202010853151 A CN202010853151 A CN 202010853151A CN 111957364 B CN111957364 B CN 111957364B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010241 blood sampling Methods 0.000 title claims description 21
- 239000008280 blood Substances 0.000 claims abstract description 104
- 210000004369 blood Anatomy 0.000 claims abstract description 103
- 239000007788 liquid Substances 0.000 claims description 71
- 238000009423 ventilation Methods 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 11
- 239000003085 diluting agent Substances 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/0203—Burettes, i.e. for withdrawing and redistributing liquids through different conduits
Abstract
The invention discloses a double-tube single-quantitative blood collection pipette and a blood collection pipetting method thereof.
Description
Technical Field
The invention relates to a double-tube single-quantitative blood sampling pipette and a blood sampling pipetting method thereof.
Background
Currently, a quantitative pipette is a pipetting tool for sucking a certain amount of liquid and transferring the liquid to another place, the conventional quantitative pipette structure is shown in fig. 1, and comprises an air bag 91, a liquid storage bag 92 and a quantitative pipette 93, wherein the air bag 91 is installed at the upper end of the liquid storage bag 92 in a communicating way, the upper end of the quantitative pipette 93 is inserted from the lower end of the liquid storage bag 92 and extends into the air bag 91 and the liquid storage bag 92, the outer periphery of the quantitative pipette 93 is kept in sealing connection with the inner periphery of the lower end of the liquid storage bag 92, the quantitative pipette with the conventional structure is formed, the air bag 91 is pressed and then loosened, so that the liquid is sucked from the quantitative pipette 93 to fill the whole quantitative pipette 93, and excessive liquid overflows into the liquid storage bag 92 below from the upper end of the quantitative pipette 93, and then the air bag 91 is pressed again to drain the liquid in the quantitative pipette 93, so that the whole sucking pipetting process is formed; however, the liquid overflowed into the liquid storage bag 92 cannot be discharged by squeezing the air bag 91, so that a part of liquid sample is wasted, and a great cost is consumed for the valuable sample, and in addition, some novice operators are excessively strong in squeezing the air bag 91, so that the whole of the quantitative pipette 93, the liquid storage bag 92 and the air bag 91 is filled with liquid, and the air pressure is insufficient to cause the liquid transfer failure; the quantitative pipette structure can be derived into various deformation structures, such as a Chinese patent with publication number of CN205126256U, wherein a liquid storage bag is communicated with the upper end side of the quantitative pipette, and backflow is prevented through an overflow pipeline which is obliquely designed, so that the quantitative pipette structure has the same defects, a pipette which can extrude, discharge and collect redundant liquid samples and prevent excessive suction defects caused by the fact that a novice operator cannot control extrusion force well is required to be developed, and in addition, the structure which can integrate blood collection and pipetting after the problems are realized is also the development key point of the invention.
Disclosure of Invention
Aiming at the defects of the prior art, the invention solves the problems that: the double-tube single-quantitative blood collection pipette and the blood collection pipetting method thereof have the advantages that the blood collection and pipetting are integrated, quantitative pipetting can be realized, excess liquid samples can be extruded and discharged, and the defect of excessive suction caused by the fact that a novice operator cannot control extrusion force is avoided.
In order to solve the problems, the invention adopts the following technical scheme:
a double-tube single-quantitative blood collection pipette comprises an upper air bag, a vent pipe, a lower air bag, a pipette and a trace blood collection tube; the upper end of the upper air bag is closed, and the lower end of the upper air bag is provided with an upper opening; the lower air bag is positioned right below the upper air bag; the upper end of the lower air bag is closed, and the lower end of the lower air bag is provided with a lower opening; the two vent pipes are arranged; the two vent pipes are respectively arranged outside two sides of the lower air bag; the upper ends of the two vent pipes extend and meet to form an upper end extending and meeting place; the upper end extension junction is positioned right above the lower air bag; the upper ends of the upper end extension junction parts of the two vent pipes are communicated with the upper opening of the lower end of the upper air bag; the pipette is arranged right below the two vent pipes and the lower air bag; the lower ends of the two vent pipes extend and meet to form a lower end extending and meeting place; the lower end extension junction is positioned right below the lower opening of the lower air bag; the upper ends of the lower end extension junctions of the two vent pipes are communicated with the lower opening of the lower air bag, and the lower ends of the lower end extension junctions of the two vent pipes are communicated with the upper ends of the pipettes; the trace blood collection tube is arranged below the pipette; the upper end of the micro blood collection tube is inserted and connected into the lower end of the pipette, and the lower end of the micro blood collection tube extends to the lower part of the pipette; the upper end of the micro blood collection tube is communicated with the external air pressure of the pipette.
Further, a cavity with a square cross section is formed in the pipette; the cross section of the outer side of the periphery of the trace blood collection tube is in a circular structure; the outer side of the periphery of the upper end of the micro blood collection tube is connected with the inner wall of the periphery of the cavity of the pipette; a plurality of ventilation gaps are uniformly arranged between the outer sides of the periphery of the micro blood collection tube and the inner wall of the cavity of the pipette.
Further, the periphery of the upper end of the micro blood collection tube is in closed connection with the inside of the lower end of the pipette; a vent is formed in one side below the pipette; the air vent is connected with an air nozzle pipe in a downward extending mode; the lower end face of the air tap tube is positioned above the lower end face of the micro blood sampling tube; the air vent is positioned above the upper end face of the micro blood collection tube.
Further, the upper end face of the pipette is connected to the outer side face of the lower end extension junction of the two vent pipes.
Further, the two vent pipes are respectively connected to the outer parts of two sides of the lower air bag through plastic parts in a solidifying mode.
Further, the pipette is a glass tube.
Further, the pipette is a plastic tube.
Further, a ventilation water-proof filter element is arranged at the lower opening of the lower air bag; the upper end and the lower end of the ventilation water-proof filter element respectively extend into the inner part of the lower air bag and the extension junction of the lower end.
A blood sampling and pipetting method of a double-tube single-quantitative blood sampling pipette comprises the following steps:
s1, blood sampling: the lower end of a trace blood collection tube below the pipette is contacted with blood to be collected, the blood is sucked by capillary action of the trace blood collection tube until the whole trace blood collection tube is filled, and then the blood in the trace blood collection tube is extruded and discharged into diluent by pressing an upper air bag or a lower air bag;
s2, pressing a lower air bag: firstly, pressing a lower air bag, then, contacting the lower end of a pipette with diluent to be sucked, loosening the lower air bag, sucking the liquid from the lower end of the pipette and filling the whole pipette, and sucking the liquid to the extending junction of the lower ends of two vent pipes and the inside of the lower air bag;
s3, pressing an upper air bag: pressing the upper air bag, extruding and discharging liquid in the whole pipette and liquid at the lower half part of the extending junction of the lower ends of the two vent pipes through air pressure in the upper air bag, so as to realize pipetting;
s4, discharging and collecting residual liquid: the lower bladder is again squeezed so that the liquid inside the lower bladder and in the upper half of the intersection where the lower ends of the two vent tubes extend is drained from the lower end of the pipette and collected.
A blood sampling and pipetting method of a double-tube single-quantitative blood sampling pipette comprises the following steps:
s1, blood sampling: the lower end of a trace blood collection tube below the pipette is contacted with blood to be collected, the blood is sucked by capillary action of the trace blood collection tube until the whole trace blood collection tube is filled, and then the blood in the trace blood collection tube is extruded and discharged into diluent by pressing an upper air bag or a lower air bag;
s2, pressing an upper air bag: firstly, pressing an upper air bag, then, contacting the lower end of a pipette with diluent to be sucked, loosening the upper air bag, sucking the liquid from the lower end of the pipette and filling the whole pipette, and sucking the liquid to the extending junction of the lower ends of two vent pipes and the inside of the two vent pipes;
s3, pressing a lower air bag: pressing the lower air bag, extruding and discharging liquid in the whole pipette and liquid at the extending junction of the lower ends of the two vent pipes through air pressure in the lower air bag, so as to realize the purpose of pipetting;
s4, discharging and collecting residual liquid: the upper bladder is again squeezed so that the liquid in both vent tubes is expelled from the lower end of the pipette and collected.
The beneficial effects of the invention are that
1. The invention realizes the function of collecting blood by installing the trace blood collecting tube below the pipette and collecting blood by the capillary principle of the trace blood collecting tube, and designs the ventilation position of the upper end of the trace blood collecting tube between the outer side of the periphery of the trace blood collecting tube and the inner wall of the cavity of the pipette or designs the ventilation position of the upper end of the trace blood collecting tube on the side wall of one side of the pipette, so that a through hole is not required to be formed on the trace blood collecting tube, and the defects of poor yield and high process difficulty of forming the through hole on the trace blood collecting tube are avoided.
2. The invention has the advantages that the liquid is sucked and discharged through the cooperation of the upper air bag and the lower air bag, the lower end of the upper air bag and the upper end of the lower air bag are sealed, the ventilation path of the upper air bag extends to the lower part of the lower air bag through the ventilation pipes at the two sides of the lower end, and the pipette is communicated with the lower air bag and the ventilation pipes, so that the paths of sucking the liquid by the two air bags are not interfered with each other, one air bag can suck the liquid, the other air bag quantitatively discharges the liquid, and the residual liquid sample is discharged through the air bag which sucks the liquid originally for recycling, so that waste is avoided.
Drawings
Fig. 1 is a schematic diagram of a prior art structure.
Fig. 2 is a schematic structural view of the present invention.
FIG. 3 is a schematic diagram showing the front view of the micropipette and pipette of embodiment 1 of the present invention.
FIG. 4 is a schematic cross-sectional view of a micropipette and pipette according to embodiment 1 of the present invention.
FIG. 5 is a schematic diagram showing the front view of the micropipette and pipette of embodiment 2 of the present invention.
Fig. 6 is a schematic structural diagram of embodiment 3 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 2 to 4, a double-tube single-dose blood collection pipette comprises an upper air bag 1, a vent pipe 3, a lower air bag 2, a pipette 4 and a micro blood collection tube 5; the upper end of the upper air bag 1 is closed, and the lower end of the upper air bag 1 is provided with an upper opening 11; the lower air bag 2 is positioned right below the upper air bag 1; the upper end of the lower air bag 2 is closed, and the lower end of the lower air bag 2 is provided with a lower opening 21; the two vent pipes 3 are arranged; the two vent pipes 3 are respectively arranged outside two sides of the lower air bag 2; the upper ends of the two vent pipes 3 are extended and intersected to form an upper end extension intersection 31; the upper end extension junction 31 is positioned right above the lower air bag 1; the upper ends of the upper end extension junction 31 of the two vent pipes 3 are communicated with the upper opening 11 at the lower end of the upper air bag 1; the pipette 4 is arranged right below the two vent pipes 3 and the lower air bag 2; the lower end extension intersection of the two vent pipes 3 forms a lower end extension intersection 32; the lower end extension junction 32 is located directly below the lower opening 21 of the lower air bag 2; the upper ends of the lower end extension junctions 32 of the two vent pipes 3 are communicated with the lower opening 21 of the lower air bag 2, and the lower ends of the lower end extension junctions 32 of the two vent pipes 3 are communicated with the upper end of the pipette 4; the micro blood collection tube 5 is arranged below the pipette 4; the upper end of the micro blood collection tube 5 is inserted and connected into the lower end of the pipette 4, and the lower end of the micro blood collection tube 5 extends to the lower part of the pipette 4; the upper end of the micro blood collection tube 5 is communicated with the external air pressure of the pipette 4. Further preferably, a cavity with a square cross section is arranged inside the pipette 4; the cross section of the outer sides of the periphery of the trace blood collection tube 5 is in a circular structure; the outer side of the periphery of the upper end of the micro blood collection tube 5 is connected with the inner wall of the periphery of the cavity of the pipette 4; a plurality of ventilation gaps 41 are uniformly formed between the outer sides of the periphery of the micro blood collection tube 5 and the inner wall of the cavity of the pipette 4, so that the ventilation is performed between the outer sides of the periphery of the micro blood collection tube 5 and the inner wall of the cavity of the pipette 4 and the outside through the ventilation gaps 41, and the micro blood collection tube 5 can collect blood by utilizing the capillary principle. Further preferably, the upper end surface of the pipette 4 is connected to the lower outer side surface of the lower end extension junction 32 of the two ventilation pipes 3. Further, the two vent pipes 3 are respectively connected to the outside of both sides of the lower airbag 2 by plastic members by curing. Further, the pipette 4 is a glass tube or a plastic tube. The interior of the pipette is generally a circular cavity structure, with the pipette volume being determined by its inside diameter and length.
Example 2
The embodiment is basically the same as the embodiment 1, except that the upper end of the micro blood collection tube 5 is in ventilation with the outside of the pipette 4, as shown in fig. 5, the periphery of the upper end of the micro blood collection tube 5 is in closed connection with the inside of the lower end of the pipette 4; a vent 41 is formed in one side below the pipette 4; the air vent 41 is connected with an air tap pipe 42 in a downward extending way; the lower end face of the air tap tube 42 is positioned above the lower end face of the micro blood sampling tube 5; the air vent 41 is positioned above the upper end face of the micro blood collection tube 5. In this way, in this embodiment, the upper end of the micro blood collection tube 5 is vented to the outside through the vent 41 on the side of the pipette 4.
Examples 1 and 2 of the present invention have the following two blood sampling and pipetting methods for the upper balloon 1 and the lower balloon 2.
First kind: as shown in fig. 2 to 5, a pipetting method of a double-tube single-dose blood collection pipette comprises the following steps: s1, blood sampling: the lower end of a trace blood collection tube 5 below a pipette 4 is contacted with blood to be collected, the blood is sucked by capillary action of the trace blood collection tube 5 until the whole trace blood collection tube 5 is filled, and then the blood in the trace blood collection tube 5 is extruded and discharged into diluent by pressing an upper air bag 1 or a lower air bag 2; s2, pressing a lower air bag: firstly, the lower air bag 2 is pressed, then the lower end of the pipette 4 is contacted with the diluent to be sucked, the lower air bag 2 is loosened, the whole pipette 4 is sucked from the lower end of the pipette 4 and filled, and the liquid is sucked into the lower end extension junction 32 of the two vent pipes 3 and the inside of the lower air bag 2; s3, pressing an upper air bag: pressing the upper air bag 1, extruding and discharging liquid in the whole liquid transferring 4 pipe and liquid at the lower half part of the extending junction 32 at the lower ends of the two vent pipes 3 through the air pressure in the upper air bag 1, so as to realize liquid transferring; s4, discharging and collecting residual liquid: the lower bladder 2 is again squeezed so that the liquid inside the lower bladder 2 and in the upper half of the extension junction 32 of the lower ends of the two vent tubes 3 is expelled from the lower end of the pipette 4 and collected.
Second kind: as shown in fig. 2 to 5, a pipetting method of a double-tube single-dose blood collection pipette comprises the following steps: s1, blood sampling: the lower end of a trace blood collection tube 5 below a pipette 4 is contacted with blood to be collected, the blood is sucked by capillary action of the trace blood collection tube 5 until the whole trace blood collection tube 5 is filled, and then the blood in the trace blood collection tube is extruded and discharged into diluent by pressing an upper air bag 1 or a lower air bag 2; s2, pressing an upper air bag: the upper air bag 1 is pressed firstly, then the lower end of the pipette 4 is contacted with the diluent to be sucked, the upper air bag 1 is loosened, the liquid is sucked from the lower end of the pipette 4 and fills the whole pipette, and the liquid is sucked into the lower end extension junction 32 of the two vent pipes 3 and the inside of the two vent pipes 3; s3, pressing a lower air bag: pressing the lower air bag 2, extruding and discharging the liquid in the whole pipette 4 and the liquid at the lower end extension junction 32 of the two vent pipes 3 through the air pressure in the lower air bag 2, so as to realize the purpose of pipetting; s4, discharging and collecting residual liquid: the upper bladder 1 is again pressed so that the liquid in the two vent tubes 3 is discharged from the lower end of the pipette 4 and collected.
Example 3
This embodiment is different from embodiment 1 or embodiment 2 in that the lower opening 21 of the lower bag 2 is provided with a ventilation water-impermeable filter element 8. As shown in fig. 6, the upper and lower ends of the air-impermeable filter element 8 extend into the inner portion of the lower air bag 2 and the lower end extension junction 32, so that the blood sampling and pipetting method of the invention can preferably be as follows: after the blood sampling dilution step, the lower air bag 2 is extruded firstly, when the liquid is sucked by the pipette 4, the path of the liquid entering is automatically closed when the liquid reaches the lower side of the ventilation water-proof filter element 8, the pipette 4 automatically stops sucking the liquid, and then after the upper air bag 1 is extruded, the liquid in the extension intersection 32 of the pipette 4 and the lower end is completely discharged, so that the liquid transferring is realized, and the subsequent process of discharging and recovering the residual liquid is avoided, so that the use is simpler and more convenient; of course, the upper air bag 1 may be extruded preferentially, and the method is described with reference to the second embodiment of example 1 or example 2.
The invention realizes the function of collecting blood by arranging the trace blood collection tube 5 below the pipette 4 and collecting blood by the capillary principle of the trace blood collection tube 5, and designs the ventilation position at the upper end of the trace blood collection tube 5 between the outer side of the periphery of the trace blood collection tube 5 and the inner wall of the cavity of the pipette 4 or designs the ventilation position at the upper end of the trace blood collection tube 5 on the side wall of one side of the pipette 4, so that a through hole is not required to be formed in the trace blood collection tube 5, and the defects of poor yield and high process difficulty of forming the through hole in the trace blood collection tube 5 are avoided.
The invention sucks and discharges the liquid through the cooperation of the upper air bag 1 and the lower air bag 2, the lower end of the upper air bag 1 and the upper end of the lower air bag 2 are sealed, the ventilation path of the upper air bag 1 extends to the lower part of the lower air bag 2 through the ventilation pipes 3 at the two sides of the lower end, and the pipette 4 is communicated with the lower air bag 2 and the ventilation pipes 3, so that the paths of sucking the liquid by the two air bags are not interfered with each other, one air bag can suck the liquid, the other air bag quantitatively discharges the liquid, and after the liquid is discharged, the excess liquid sample is extruded and discharged through the air bag which sucks the liquid originally, so that waste is avoided.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. A pipetting method of a double-tube single-quantitative blood collection pipette is characterized by comprising an upper air bag, a vent pipe, a lower air bag, a pipette and a trace blood collection tube; the upper end of the upper air bag is closed, and the lower end of the upper air bag is provided with an upper opening; the lower air bag is positioned right below the upper air bag; the upper end of the lower air bag is closed, and the lower end of the lower air bag is provided with a lower opening; the two vent pipes are arranged; the two vent pipes are respectively arranged outside two sides of the lower air bag; the upper ends of the two vent pipes extend and meet to form an upper end extending and meeting place; the upper end extension junction is positioned right above the lower air bag; the upper ends of the upper end extension junction parts of the two vent pipes are communicated with the upper opening of the lower end of the upper air bag; the pipette is arranged right below the two vent pipes and the lower air bag; the lower ends of the two vent pipes extend and meet to form a lower end extending and meeting place; the lower end extension junction is positioned right below the lower opening of the lower air bag; the upper ends of the lower end extension junctions of the two vent pipes are communicated with the lower opening of the lower air bag, and the lower ends of the lower end extension junctions of the two vent pipes are communicated with the upper ends of the pipettes; the trace blood collection tube is arranged below the pipette; the upper end of the micro blood collection tube is inserted and connected into the lower end of the pipette, and the lower end of the micro blood collection tube extends to the lower part of the pipette; the upper end of the micro blood collection tube is communicated with the external air pressure of the pipette; the method comprises the following steps: s1, blood sampling: the lower end of a trace blood collection tube below the pipette is contacted with blood to be collected, the blood is sucked by capillary action of the trace blood collection tube until the whole trace blood collection tube is filled, and then the blood in the trace blood collection tube is extruded and discharged into diluent by pressing an upper air bag or a lower air bag; s2, pressing an upper air bag: firstly, pressing an upper air bag, then, contacting the lower end of a pipette with diluent to be sucked, loosening the upper air bag, sucking the liquid from the lower end of the pipette and filling the whole pipette, and sucking the liquid to the extending junction of the lower ends of two vent pipes and the inside of the two vent pipes; s3, pressing a lower air bag: pressing the lower air bag, extruding and discharging liquid in the whole pipette and liquid at the extending junction of the lower ends of the two vent pipes through air pressure in the lower air bag, so as to realize the purpose of pipetting; s4, discharging and collecting residual liquid: the upper bladder is again squeezed so that the liquid in both vent tubes is expelled from the lower end of the pipette and collected.
2. The pipetting method of a double-tube single-dose blood collection pipette according to claim 1, wherein a cavity having a square cross section is provided inside the pipette; the cross section of the outer side of the periphery of the trace blood collection tube is in a circular structure; the outer side of the periphery of the upper end of the micro blood collection tube is connected with the inner wall of the periphery of the cavity of the pipette; a plurality of ventilation gaps are uniformly arranged between the outer sides of the periphery of the micro blood collection tube and the inner wall of the cavity of the pipette.
3. The pipetting method of the double-tube single-dose blood collection pipette according to claim 1, wherein the periphery of the upper end of the micro-blood collection tube is in closed connection with the inside of the lower end of the pipette; a vent is formed in one side below the pipette; the air vent is connected with an air nozzle pipe in a downward extending mode; the lower end face of the air tap tube is positioned above the lower end face of the micro blood sampling tube; the air vent is positioned above the upper end face of the micro blood collection tube.
4. The pipetting method of a double-tube single-dose blood collection pipette as recited in claim 1, wherein the upper end surface of the pipette is connected to the lower outer side surface of the junction where the lower ends of the two vent tubes extend.
5. The pipetting method of a double-tube single-dose blood collection pipette according to claim 1, wherein the two vent tubes are respectively fixedly connected to both outer sides of the lower air bag by plastic members.
6. The pipetting method of a double-tube single-dose blood collection pipette according to claim 1, wherein the pipette is a glass tube or a plastic tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010853151.7A CN111957364B (en) | 2020-08-22 | 2020-08-22 | Double-tube single-quantitative blood sampling pipette and blood sampling pipetting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010853151.7A CN111957364B (en) | 2020-08-22 | 2020-08-22 | Double-tube single-quantitative blood sampling pipette and blood sampling pipetting method thereof |
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| CN111957364B true CN111957364B (en) | 2024-01-12 |
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| CN104116513A (en) * | 2013-04-23 | 2014-10-29 | 马荣华 | Self-priming type quantitative micro-quantity blood collection tube |
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|---|---|---|---|---|
| CN202752030U (en) * | 2012-07-12 | 2013-02-27 | 湖北中烟工业有限责任公司 | Convenient straw for cigarette fragrance formula experiment |
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| CN111957364A (en) | 2020-11-20 |
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