CN111839549B - Device for accurately and quantitatively extracting blood sample - Google Patents
Device for accurately and quantitatively extracting blood sample Download PDFInfo
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- CN111839549B CN111839549B CN202010639053.3A CN202010639053A CN111839549B CN 111839549 B CN111839549 B CN 111839549B CN 202010639053 A CN202010639053 A CN 202010639053A CN 111839549 B CN111839549 B CN 111839549B
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- 239000008280 blood Substances 0.000 title claims abstract description 81
- 210000004369 blood Anatomy 0.000 title claims abstract description 81
- 239000007788 liquid Substances 0.000 claims abstract description 97
- 230000007246 mechanism Effects 0.000 claims abstract description 86
- 238000005070 sampling Methods 0.000 claims abstract description 42
- 239000006096 absorbing agent Substances 0.000 claims abstract description 34
- 238000012546 transfer Methods 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 17
- 239000007924 injection Substances 0.000 description 17
- 230000017531 blood circulation Effects 0.000 description 8
- 238000010241 blood sampling Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 3
- 238000002405 diagnostic procedure Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 206010052428 Wound Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150992—Blood sampling from a fluid line external to a patient, such as a catheter line, combined with an infusion line; Blood sampling from indwelling needle sets, e.g. sealable ports, luer couplings or valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
- A61B5/150221—Valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
- A61B5/150229—Pumps for assisting the blood sampling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
- A61B5/150236—Pistons, i.e. cylindrical bodies that sit inside the syringe barrel, typically with an air tight seal, and slide in the barrel to create a vacuum or to expel blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
- A61B5/154—Devices using pre-evacuated means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/155—Devices specially adapted for continuous or multiple sampling, e.g. at predetermined intervals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/157—Devices characterised by integrated means for measuring characteristics of blood
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Hematology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Veterinary Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Manufacturing & Machinery (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
The invention provides a device for accurately and quantitatively extracting a blood sample, which comprises a liquid transferring cavity, a residual liquid absorber, a liquid transferring power mechanism, a sample inlet and a sample outlet, wherein a first check mechanism is arranged at the sample inlet, a second check mechanism is arranged at the sample outlet, the sample inlet is connected with the front end of the liquid transferring cavity, the liquid transferring power mechanism is connected with the residual liquid absorber, the liquid transferring cavity comprises an accurate sampling cavity, the residual liquid absorber is connected with one end of the accurate sampling cavity, and the sample outlet is connected with the other end of the accurate sampling cavity through the second check mechanism. According to the invention, through the arranged sample inlet, sample outlet, residual liquid absorber and liquid transfer power mechanism, the accurate sampling cavity is utilized to realize accurate quantitative adoption of blood by matching with the work of the first check mechanism and the second check mechanism.
Description
Technical Field
The present invention relates to a quantitative drawing device, and more particularly to a device for accurately and quantitatively drawing a blood sample.
Background
With the improvement of medical technology, diagnostic test papers capable of analyzing human health information with only a small amount of blood have begun to be widely used. Particularly for inpatients, regular blood sampling is needed for health monitoring, but regular blood sampling can cause a plurality of wounds on the body of the patient, and the problems of excessive wounds are solved by a catheter, an indwelling needle and an injection needle implanted into the human body, but the existing blood sampling device has large blood sampling amount, cannot directly and accurately sample the blood sample quantitatively, cannot provide a solution for various tests (such as various diagnostic test papers for detecting the blood sample accurately and quantitatively) requiring accurate and quantitative blood sample detection, and is difficult to realize bedside detection, quick result and quick diagnosis.
At present, blood sampling equipment capable of realizing micro sampling functions like a pipette, a micro sampler and the like does not exist in the market. The conventional microsyringe devices such as microsyringes and pipettes all need to be operated in laboratory places, and cannot accurately extract a fixed amount of blood samples from intravascular catheters, indwelling needles, injection needles and the like which are placed in human bodies, because the intravascular catheters, the indwelling needles, the injection needles and the like are directly inserted into human body blood vessels, and the connectors are luer connectors. The conventional microsyringe, pipettor and the like cannot be directly connected with an intravascular catheter, an indwelling needle, an injection needle and the like because connectors are not matched, and even if the conventional microsyringe, pipettor and the like are successfully connected by a certain technical means, a fixed amount of blood sample cannot be accurately removed due to factors such as intravascular pressure, blood viscosity and the like.
The invention has simple structure and no special use method, can directly connect the device with an intravascular catheter, an indwelling needle, an injection needle and the like, directly draw quantitative blood samples from human bodies, and provides a solution for various tests requiring accurate quantitative blood samples for detection (such as various diagnostic test papers requiring accurate quantitative blood samples for detection), thereby realizing bedside detection, rapid diagnosis and rapid result, and providing a more efficient way for diagnosis and treatment of patients.
Disclosure of Invention
The present invention provides a device for accurately and quantitatively drawing a blood sample to realize the simple collection of a quantitative blood sample.
The invention provides a device for accurately and quantitatively extracting a blood sample, which comprises a liquid transferring cavity, a residual liquid absorber, a liquid transferring power mechanism, a sample inlet and a sample outlet, wherein a first check mechanism is arranged at the sample inlet, a second check mechanism is arranged at the sample outlet, the sample inlet is connected with the front end of the liquid transferring cavity, the liquid transferring power mechanism is connected with the residual liquid absorber, the liquid transferring cavity comprises an accurate sampling cavity, the residual liquid absorber is connected with one end of the accurate sampling cavity, and the sample outlet is connected with the other end of the accurate sampling cavity through the second check mechanism.
Further, the sample inlet is also provided with a luer locking connector.
Further, the first check mechanism may be selected from one of a catheter clip, a puncture valve, a check valve, or other device that controls blood passage.
Further, the second check mechanism may be selected from one of a catheter clip, a puncture valve, a non-return valve, or other device that controls blood passage.
Further, the accurate sampling cavity is of a columnar structure.
Further, the fluid transfer power mechanism is a syringe or an ear-washing ball, a pipette, a pump, or the like, which can draw and push blood.
Further, the residual liquid absorber is provided with a breathable blood sucking material.
Further, the raffinate absorber also has a liquid storage tank.
Still further, the precision sampling chamber includes a volume adjustment device.
Further, a plurality of scales are arranged along the extending direction of the accurate sampling cavity.
Furthermore, the volume adjusting device comprises an inner pipe, an outer pipe and a sealing ring, one end of the outer pipe is sleeved outside one end of the inner pipe in a sliding manner, and the sealing ring is arranged between the outer pipe and the inner pipe.
Further, the second check mechanism comprises a shell and an adjusting piece, the accurate sampling cavity is located in the adjusting piece, the adjusting piece is movably installed in the shell, the adjusting piece is provided with a first working position and a second working position in the shell, when the adjusting piece is located in the first working position, two ends of the accurate sampling cavity are respectively connected with the sample inlet and the residual liquid absorber, the accurate sampling cavity is not communicated with the sample outlet, when the adjusting piece is located in the second working position, two ends of the accurate sampling cavity are respectively connected with the sample outlet and the liquid transfer power mechanism, and the accurate sampling cavity is not communicated with the sample inlet.
Still further, the device still includes the test paper card, test paper card detachable installs in the pipetting chamber outside, the test paper card is equipped with the blood collection district in a kind mouth department, the blood collection district is relative with a kind mouth.
Compared with the prior art, the quantitative blood taking device has the advantages that through the sequentially arranged sample inlet, sample outlet, residual liquid absorber and liquid transfer power mechanism, the quantitative blood taking device is matched with the work of the first check mechanism and the second check mechanism, and the quantitative blood taking device is realized by utilizing the liquid transferring cavity between the sample outlet and the residual liquid absorber. Meanwhile, the quantitative collection device is simple in structure, quantitative collection can be realized by simply controlling the first check mechanism, the second check mechanism and the liquid transfer power mechanism, and is convenient for nurses to use, and training difficulty is reduced.
Drawings
Fig. 1 is an assembly schematic diagram of embodiment mode 1 of the present invention;
fig. 2 is an assembly schematic diagram of embodiment mode 2 of the present invention;
fig. 3 is an assembly schematic of embodiment mode 3 of the present invention;
FIG. 4 is a schematic view of a volume adjusting device with minimal volume according to an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the volume adjusting device with the maximum volume according to the embodiment of the invention;
FIG. 6 is a schematic cross-sectional view of a second check mechanism of the adjustment member in a first operating position according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a second check mechanism of the adjustment member in a second operating position according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The embodiment of the invention discloses a device for accurately and quantitatively extracting a blood sample, which comprises a pipetting cavity 5, a residual liquid absorber 6, a liquid transfer power mechanism 8, a sample inlet and a sample outlet 4, wherein a first check mechanism 2 is arranged at the sample inlet, a second check mechanism is arranged at the sample outlet 4, the sample inlet is connected with the front end of the pipetting cavity 5, the liquid transfer power mechanism 8 is connected with the residual liquid absorber 6, the pipetting cavity 5 comprises an accurate sampling cavity, the residual liquid absorber 6 is connected with one end of the accurate sampling cavity, and the sample outlet 4 is connected with the other end of the accurate sampling cavity through the second check mechanism.
As shown in fig. 1, the device has a blood flow line 3, and a pipetting chamber 5 is provided in the blood flow line 3. Including liquid transferring power unit 8, liquid transferring power unit 8 is equipped with sample inlet, a sample outlet 4, liquid transferring power unit 8 links to each other with raffinate absorber 6, raffinate absorber 6 links to each other with liquid transferring power unit 5, a sample outlet 4 is located between sample inlet, the raffinate absorber 6, sample inlet department is equipped with first check mechanism 2, a sample outlet 4 department is equipped with second check mechanism, and accurate sample chamber is located between raffinate absorber 6 and the sample outlet 4.
When blood is taken, the sample inlet is connected with a needle tube inserted into a human body, the first check mechanism is opened, the second check mechanism is closed, the liquid transfer power mechanism is controlled to work, the liquid transfer cavity is in a negative pressure state, and blood flows into the liquid transfer cavity; when blood flows to the residual liquid absorber 6, the operation of the liquid transfer power mechanism is stopped, the residual liquid absorber 6 or the liquid storage tank 9 absorbs redundant blood, the second check mechanism is started, the first check mechanism is closed, the liquid transfer power mechanism is controlled to work reversely, the liquid transfer power mechanism is enabled to be in a positive pressure state, the blood flows out from the sample outlet, and the volume of the liquid transfer cavity 5 between the sample outlet and the residual liquid absorber 6 or the liquid storage tank 9 is equal to the volume of the liquid transfer cavity. The device of the embodiment of the invention can be directly connected with a built-in catheter, an indwelling needle, an injection needle and the like, suction and injection are carried out by using the injector, and the opening and closing of the two check mechanisms and the pipetting cavity for accurately controlling the inner cavity volume are ingeniously utilized to quantitatively transfer blood to a fixed area.
According to the embodiment of the invention, the first check mechanism and the second check mechanism are adopted, so that the backflow of the extracted blood and external air into a human body can be avoided, and the safety of the human body is improved. In addition, according to the embodiment of the invention, through the sequentially arranged sample inlet, sample outlet, residual liquid absorber or liquid storage tank and liquid transfer power mechanism, the quantitative adoption of blood is realized by utilizing the liquid transfer cavity among the sample outlet, residual liquid absorber or liquid storage tank in combination with the opening and closing of the first check mechanism and the second check mechanism. Meanwhile, the embodiment of the invention has a simple structure, quantitative collection can be realized by simply controlling the first check mechanism, the second check mechanism and the liquid transfer power mechanism, and is convenient for nurses to use, and the training difficulty is reduced.
Optionally, the sample inlet is further provided with a luer locking connector 1.
The luer lock joint 1 can be stably connected with an imbedded catheter, an indwelling needle and an injection needle which are inserted into a human body, so that disconnection caused by pressure problems is avoided.
Alternatively, the first check mechanism 2 may be one of a catheter clip, a puncture valve, and a check valve.
Optionally, the second check mechanism may be one of a catheter clip, a puncture valve, and a check valve.
The first check mechanism 2 and the second check mechanism can adopt a check structure which can be opened by manual control, such as a conduit clamp, a puncture valve and the like, and can also adopt a one-way valve structure which can only flow liquid in one way, such as a check valve and the like, so that blood can only flow into the pipetting cavity 5 through the first check mechanism 2 and can only flow out of the pipetting cavity through the second check mechanism. In the embodiment of the invention, the first check mechanism and the second check mechanism are respectively exemplified by check valves.
Optionally, the pipetting cavity 5 between the liquid transfer power mechanism 8 and the sample outlet 4 is in a columnar structure.
Alternatively, the fluid transfer power mechanism 8 is a syringe 8.
The liquid transferring power mechanism is an air pumping and compressing device, such as a diaphragm pump, a syringe and the like, in the embodiment of the invention, the syringe is taken as an example, as shown in fig. 1-3, the liquid transferring power mechanism 8 is a syringe 8, and a syringe rubber plug 7 is arranged in the syringe 8. A liquid storage tank 9 for storing redundant blood is arranged on one side of the residual liquid absorber 6 between the tail end of the liquid transferring cavity 5 and the injector 8, and air-permeable water absorbing pads are arranged in the residual liquid absorber 6 and the liquid storage tank 9 and used for absorbing redundant blood.
Taking mode 1 as an example, as shown in fig. 1, the device is connected with a built-in catheter, an indwelling needle, an injection needle and the like through a luer lock joint 1, after connection, the syringe 8 starts sucking, the first check mechanism 2 is opened, the sucking is stopped when blood flows to the position of the residual liquid absorber 6, the syringe 8 is controlled to start back injection, when the injection is performed, the first check mechanism 2 is closed under the pressure, and the blood sample flows out from the sample outlet 4; finally, the volume of the blood flowing out of the sample outlet 4 is the volume of the inner cavity of the pipeline between the two broken lines (namely the volume of the pipetting cavity 5), and the tail part of the sample outlet 4 can be connected with a blood receiving device; the purpose of accurately quantifying the blood sample can be achieved by controlling the inner cavity volume of the two-dashed-line-section pipeline through design and production processes. In the whole process, the user can reach the requirement by pulling and pushing the injector one time, and the requirement on the user is low.
Particularly, the tail end of the liquid transferring cavity is provided with a liquid storage groove 9, the liquid storage groove 9 is positioned at the tail end of the liquid transferring cavity with a columnar structure and is close to one end of the liquid transferring power mechanism 8, and a ventilation and water absorption pad is arranged in the liquid storage groove.
The liquid storage tank is used for absorbing and storing redundant blood, the blood in the liquid storage tank is separated from the liquid transferring cavity when the power mechanism applies positive pressure, and the blood in the liquid storage tank cannot enter the liquid transferring cavity, so that the accurate quantitative transfer of the blood sample is realized by controlling the volume of the liquid transferring cavity.
Taking mode 2 as an example, as shown in fig. 2, the device is connected with a built-in catheter, an indwelling needle, an injection needle and the like through a luer lock joint 1, after connection, the syringe 8 starts sucking, the first check mechanism 2 is opened, the sucking is stopped when blood flows to the position of the liquid storage tank 9, the syringe 8 is controlled to start back injection, when the injection is performed, the first check mechanism 2 is closed under the pressure, and a blood sample flows out from the sample outlet 4; finally, the volume of the blood flowing out of the sample outlet 4 is the volume of the inner cavity of the pipeline between the two broken lines, and the tail part of the sample outlet 4 can be connected with a blood receiving device; the purpose of accurately quantifying the blood sample can be achieved by controlling the inner cavity volume of the two-dashed-line-section pipeline through design and production processes.
By arranging the liquid storage tank, the embodiment of the invention can absorb and store redundant blood to prepare the need of multiple sampling (refer to the role of the liquid storage tank).
In particular, the columnar structure comprises a volume adjustment device 10.
Taking mode 3 as an example, as shown in fig. 3, the device is connected with a built-in catheter, an indwelling needle, an injection needle and the like through a luer lock joint 1, after connection, the syringe 8 starts sucking, the first check mechanism 2 is opened, the sucking is stopped when blood flows to the position of the liquid storage tank 9, the syringe 8 is controlled to start back injection, when the injection is performed, the first check mechanism 2 is closed under the pressure, and a blood sample flows out from the sample outlet 4; finally, the volume of the blood flowing out of the sample outlet 4 is the volume of the inner cavity of the pipeline between the two broken lines, and the tail part of the sample outlet 4 can be connected with a blood receiving device; the volume adjusting device 10 marks volume scales on the outer surface of the pipeline, and the volume of the inner cavity of the pipeline with two broken line sections can be changed by adjusting the volume adjusting device 10, so that the volume of the blood sample can be extracted as required; the inner cavity volume of the two broken line sections and the volume adjusting device 10 are controlled through design and production technology, so that the purpose of accurately quantifying the blood sample can be achieved.
In particular, the volume adjusting device is provided with a plurality of scales along the extending direction of the columnar structure.
The scale is a volume scale, and the scale from the liquid transfer power mechanism 8 to the sample outlet 4 sequentially represents the amount of the extracted blood.
According to the embodiment of the invention, the volume of the volume adjusting device can be adjusted according to the requirement by adopting the pipeline volume adjusting device, so that the volume of the blood sample can be adjusted according to the requirement.
In particular, as shown in fig. 3, 4 and 5, the volume adjusting device includes an inner tube 31, an outer tube 32, and a sealing ring 33, wherein one end of the outer tube 32 is slidably sleeved outside one end of the inner tube 31, and the sealing ring 33 is disposed between the outer tube 32 and the inner tube 31.
As shown in fig. 4 and 5, the outer surface of the inner tube 31 has a screw 311, one end of the outer tube 32 is screwed with the inner tube 31, and a seal ring 33 is fixed to the inner tube 31 to seal the space between the outer tube 32 and the inner tube 31. By rotating the outer tube 32, the inner cavity space between the two broken lines of the inner tube 31 and the outer tube 32 can be adjusted, and the adjustment and control of the blood sample amount can be realized.
Optionally, as shown in fig. 6 and fig. 7, the second check mechanism includes a housing 42 and an adjusting member 41, the precise sampling cavity 51 is located in the adjusting member 41, the adjusting member 41 is movably mounted in the housing 42, the adjusting member 41 is provided with a first working position and a second working position in the housing 42, when the adjusting member 41 is located in the first working position, two ends of the precise sampling cavity 51 are respectively connected with the sample inlet and the first passage 52 (i.e. the residual liquid absorber), the precise sampling cavity 51 is not connected with the sample outlet 4, and when the adjusting member 41 is located in the second working position, two ends of the precise sampling cavity 51 are respectively connected with the sample outlet 4 and the liquid transfer power mechanism 8, and the precise sampling cavity 51 is not connected with the sample inlet.
As shown in fig. 6 and 7, the casing 42 is composed of a front rubber pad and a rear rubber pad, and has sealing and conducting functions. The first check mechanism 2 is a check valve, the adjusting member 41 is a rotatable cylindrical inner core 41, the inner core 41 is provided with a rotary handle 411, a first passage 52 is arranged at the axis of the inner core 41, and when the inner core 41 rotates, the position of the first passage 52 is fixed, so that the connection with the liquid transfer power mechanism 8 can be maintained. The first passage 52 is a pipeline structure, a third passage 54 and a fourth passage 55 are arranged in the shell 42, and the first passage 52, the second passage 53 and the accurate sampling cavity 51 are positioned in the inner core 41. The first passage 52 is provided with a water-proof sponge 521, which can prevent the flow of blood while ensuring the fluidity of air.
In the process of blood collection, as shown in fig. 6, the handle 411 is pushed to rotate the inner core 41 to be in the first working position, the sample inlet, the accurate sampling cavity 51, the third passage 54, the first passage 52 and the second passage 53 are sequentially connected to form a blood collection channel, and the blood sample sequentially passes through the sample inlet, the accurate sampling cavity 51, the third passage 54, the first passage 52 and the second passage 53 and is blocked by the waterproof sponge 521 in the first passage 52.
During blood transfusion, as shown in fig. 7, the inner core 41 is rotated to be in the second working position, the second passage 53, the fourth passage 55, the accurate sampling cavity 51 and the sample outlet 4 are sequentially connected to form a blood transfusion passage, the piston 7 in the infusion apparatus 8 is pushed, air input by the infusion apparatus 8 sequentially passes through the second passage 53, and the fourth passage 55 applies pressure to the blood sample in the accurate sampling cavity 51, so that the blood sample flows out from the sample outlet 4, and accurate blood sampling is realized.
According to the embodiment of the invention, through arranging the inner core structure, the blood sample in the accurate sampling cavity is transferred by utilizing the rotation of the inner core, so that the effect of accurate sampling is realized, and the device has the advantage of simplicity in operation.
In particular, the device further comprises a test paper card 10, the test paper card 10 is detachably arranged outside the pipetting chamber 5, the test paper card 10 is provided with a blood collection area 101 at the sample outlet 4, and the blood collection area 101 is opposite to the sample outlet 4.
Wherein, the pipetting chamber 5 outside is equipped with the draw-in groove structure in outlet 4 department, makes test paper card 10 detachable install in the draw-in groove, and the blood collection area 101 of test paper card 10 is relative with outlet 4, makes blood sample can be direct with test paper contact, reduces the interference risk of external factor.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the specific embodiments of the present application after reading the present specification, and these modifications and variations do not depart from the scope of the application as claimed in the pending claims.
Claims (8)
1. The device is characterized by comprising a liquid transferring cavity, a residual liquid absorber, a liquid transferring power mechanism, a sample inlet and a sample outlet, wherein a first check mechanism is arranged at the sample inlet, a second check mechanism is arranged at the sample outlet, the sample inlet is connected with the front end of the liquid transferring cavity, the liquid transferring power mechanism is connected with the residual liquid absorber, the liquid transferring cavity comprises an accurate sampling cavity, the residual liquid absorber is connected with one end of the accurate sampling cavity, and the sample outlet is connected with the other end of the accurate sampling cavity through the second check mechanism;
The second check mechanism comprises a shell and an adjusting piece, the accurate sampling cavity is positioned in the adjusting piece, the adjusting piece is movably arranged in the shell, a first working position and a second working position are arranged in the shell by the adjusting piece, when the adjusting piece is positioned in the first working position, two ends of the accurate sampling cavity are respectively connected with the sample inlet and the residual liquid absorber, the accurate sampling cavity is not communicated with the sample outlet, when the adjusting piece is positioned in the second working position, two ends of the accurate sampling cavity are respectively connected with the sample outlet and the liquid transfer power mechanism, and the accurate sampling cavity is not communicated with the sample inlet;
The sample inlet is also provided with a luer locking joint, the first check mechanism is one of a conduit clamp, a puncture valve and a check valve, and the second check mechanism is one of a conduit clamp, a puncture valve and a check valve.
2. The device for accurately quantifying a drawn blood sample of claim 1, wherein the accurate sampling cavity is a columnar structure.
3. The device for accurately and quantitatively drawing a blood sample according to claim 1, wherein said fluid transfer power mechanism is a blood drawing and pushing device and said fluid transfer power mechanism is one of a syringe, an ear-washing ball, a pipette, and a pump.
4. The device for accurately quantifying the amount of a blood sample according to claim 1, wherein said residual fluid absorber has a reservoir.
5. The device for accurately and quantitatively drawing a blood sample according to claim 1, wherein said residual liquid absorber is provided with a breathable blood sucking material therein.
6. The device for accurately quantifying the amount of a blood sample of claim 1, wherein the accurate sampling chamber comprises a volume adjustment device.
7. The device for accurately and quantitatively drawing a blood sample according to claim 6, wherein the volume adjusting device comprises an inner tube, an outer tube and a sealing ring, one end of the outer tube is sleeved outside one end of the inner tube in a sliding manner, and the sealing ring is arranged between the outer tube and the inner tube.
8. The device for accurately and quantitatively drawing a blood sample according to claim 1, further comprising a test paper card detachably mounted outside the pipetting chamber, wherein the test paper card is provided with a blood collection area at the sample outlet, and the blood collection area is opposite to the sample outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010639053.3A CN111839549B (en) | 2020-07-06 | 2020-07-06 | Device for accurately and quantitatively extracting blood sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010639053.3A CN111839549B (en) | 2020-07-06 | 2020-07-06 | Device for accurately and quantitatively extracting blood sample |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111839549A CN111839549A (en) | 2020-10-30 |
| CN111839549B true CN111839549B (en) | 2024-07-12 |
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| SE8400288L (en) * | 1984-01-20 | 1985-07-21 | Anders Edvard Trell | DEVICE FOR TAKING AND SETTING BLOOD SINK |
| JPS63315033A (en) * | 1987-06-18 | 1988-12-22 | Terumo Corp | Method and apparatus for collecting blood specimen |
| JP4030682B2 (en) * | 1999-07-09 | 2008-01-09 | テルモ株式会社 | Blood collection instrument |
| US20010027269A1 (en) * | 2000-03-29 | 2001-10-04 | Yousuke Tanaka | Liquid sampler and blood analyzer using the same |
| KR101006132B1 (en) * | 2004-05-17 | 2011-01-07 | 세키스이가가쿠 고교가부시키가이샤 | Backflow prevention structure of blood collection device, luer needle, blood collection needle and blood collection holder |
| CN102138800B (en) * | 2010-12-30 | 2012-09-05 | 中国人民解放军第三军医大学第一附属医院 | Piston type portable detection system for blood of human body |
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