CN112461602A - Simple and easy accurate quantitative sampling device of blood - Google Patents
Simple and easy accurate quantitative sampling device of blood Download PDFInfo
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- 239000008280 blood Substances 0.000 title claims abstract description 85
- 210000004369 blood Anatomy 0.000 title claims abstract description 85
- 238000005070 sampling Methods 0.000 title claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 194
- 238000012360 testing method Methods 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 16
- 238000002347 injection Methods 0.000 abstract description 12
- 239000007924 injection Substances 0.000 abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000003745 diagnosis Methods 0.000 abstract description 10
- 238000002474 experimental method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 9
- 210000004204 blood vessel Anatomy 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 230000000717 retained effect Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000002405 diagnostic procedure Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
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- 230000036772 blood pressure Effects 0.000 description 3
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- 239000002250 absorbent Substances 0.000 description 2
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- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
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Abstract
The embodiment of the invention provides a simple blood precise quantitative sampling device, which comprises a shell, a piston and a joint, wherein the piston is slidably arranged in an inner cavity of the shell, the joint is fixedly arranged at the end part of the shell, and the inner cavity of the joint is used for communicating the inner cavity of the shell with the external environment; the liquid quantitative area is arranged in the inner cavity of the shell and communicated with the inner cavity of the joint, and the liquid quantitative area is used for quantitatively storing liquid; the water absorption structure is arranged between the liquid quantitative area and the inner side wall of the shell. The simple blood precise quantitative sampling device provided by the invention has a simple integral structure and no special use method, can realize bedside detection, rapid result output and rapid diagnosis, and provides a more efficient way for diagnosis and treatment of patients. In addition, the whole appearance of the device is similar to that of a conventional injector, no additional pipeline or injection port is provided, the operation method is simple and rapid, and the device can be directly matched and connected with a test paper card for a conventional experiment without additional operation steps.
Description
Technical Field
The invention relates to the technical field of medical appliance articles, in particular to a simple blood precise quantitative sampling device.
Background
In the technical field of medical instruments, it is often necessary to directly and precisely quantitatively extract a liquid blood sample from a catheter, an indwelling needle or an injection needle or other instruments implanted into a human body, so as to provide solutions for various testing methods (for example, detection of a precisely quantitative blood sample by various diagnostic test paper) requiring precise quantitative detection of a liquid blood sample, and further achieve bedside detection, rapid outcome and rapid diagnosis.
Microsample devices such as microsyringe and pipettor among the prior art are relatively fit for operating in the laboratory place, can not directly follow and keep somewhere in the human blood vessel the catheter, keep somewhere the liquid blood sample of accurate extraction fixed quantity in instruments such as needle or syringe needle, and the leading cause is as follows:
instruments such as a catheter, an indwelling needle or an injection needle and the like which are arranged in a blood vessel are directly inserted into the blood vessel of a human body, interfaces are luer connectors, and existing micro sample injection devices such as a micro sample injector, a liquid-moving device and the like cannot be directly connected with the instruments such as the catheter, the indwelling needle or the injection needle and the like which are arranged in the blood vessel because the interfaces are not matched;
even if the connection ports of micro-sampling devices such as a micro-sampler and a pipette are successfully connected with instruments such as a catheter, an indwelling needle or an injection needle which are indwelling in a blood vessel by a certain technical means, the accurate transfer of a fixed amount of blood sample cannot be realized due to the influence of factors such as the pressure in the blood vessel of a human body, the viscosity of the blood and the like.
Therefore, how to directly and accurately extract a liquid blood sample from a catheter, an indwelling needle, an injection needle and other instruments implanted into a human body becomes a technical problem to be solved in the field of medical instruments.
Disclosure of Invention
In view of the technical problems described in the background art, the present invention provides a simple blood precise quantitative sampling device, which has the characteristics of simple structure, convenient operation and capability of realizing the quantitative and precise sampling of a liquid blood sample.
The utility model provides a simple and easy accurate quantitative sampling device of blood which characterized in that includes:
the piston is slidably arranged in an inner cavity of the shell, the joint is fixedly arranged at the end part of the shell, and the inner cavity of the joint is used for communicating the inner cavity of the shell with the external environment;
the liquid quantitative area is arranged in the inner cavity of the shell and communicated with the inner cavity of the joint, and the liquid quantitative area is used for quantitatively storing liquid;
a water absorbing structure disposed between the liquid metering zone and the inner sidewall of the housing.
Furthermore, a bulge structure is fixedly arranged in the inner cavity of the shell, and an accommodating space formed by the inner cavity of the bulge structure is the liquid quantifying area.
Further, the fitting is a male luer fitting.
Further, the water absorption structure is a water absorption sponge.
Further, still include the test paper card, the test paper card with the lateral wall of shell is adjacent to be set up, the test paper card with be equipped with the intermediate channel between the liquid ration district, just the test paper card with the intermediate channel is linked together.
Further, still include the diverter valve, the diverter valve sets up in the liquid ration district, wherein:
when the opening of the steering valve faces the liquid quantifying area and the joint respectively, the liquid quantifying area is communicated with the inner cavity of the joint;
when the opening of the diverter valve faces the liquid metering area and the intermediate passage, the liquid metering area and the intermediate passage are communicated.
Furthermore, a test paper card sampling area is arranged on the test paper card, and the test paper card sampling area and the middle channel are correspondingly arranged.
Further, the liquid quantitative device further comprises a one-way valve, wherein the one-way valve is arranged in the inner cavity of the joint and is used for preventing liquid in the joint and the liquid quantitative area from flowing reversely.
Further, the inner cavity of the shell is provided with a lower limit structure and an upper limit structure, the lower limit structure is arranged at the bottom of the upper limit structure, the lower limit structure is used for blocking the piston to slide downwards, and the upper limit structure is used for blocking the piston to slide upwards.
Further, the lower limit structure and the upper limit structure are both annular protruding structures arranged on the inner side wall of the shell.
The simple blood precise quantitative sampling device provided by the invention comprises a shell, a piston and a joint, wherein the piston is slidably arranged in an inner cavity of the shell, the joint is fixedly arranged at the end part of the shell and is communicated with the inner cavity of the shell and the external environment, and a liquid sample in the external environment can be extracted into the inner cavity of the shell through the joint by pulling the piston to move upwards. Still be equipped with liquid ration district in the inner chamber of shell, liquid ration district is used for the ration to preserve liquid sample, and the concrete principle is: when the piston is pulled to move upwards, the liquid sample in the external environment firstly enters the liquid quantifying area, and after the liquid sample in the liquid quantifying area is filled, the liquid sample is retained in the liquid quantifying area under the action of the atmospheric pressure, so that the quantitative and accurate extraction of the volume of the liquid sample is realized. Still be equipped with the water-absorbing structure in the inner chamber of shell, the water-absorbing structure setting is between the inside wall of liquid ration district and shell, and the water-absorbing structure is arranged in absorbing the unnecessary liquid sample of suction in the shell inner chamber, and the theory of particularity is: the liquid sample drawn into the inner cavity of the shell is firstly filled in the liquid quantifying area, and the redundant liquid sample can overflow and fall to the water absorption structure so as to be absorbed by the water absorption structure.
In summary, the specific steps and principles of using the simple blood precise quantitative sampling device are as follows:
aligning a joint at the end part of a shell with a liquid sample to be extracted, pulling a piston upwards, and pumping the liquid sample into a cavity of the shell through an inner cavity of the joint in the process that the piston moves from bottom to top;
secondly, the liquid sample entering the cavity of the shell firstly enters a liquid quantitative area, and when the liquid sample in the liquid quantitative area is full, the liquid sample is kept in the liquid quantitative area under the action of atmospheric pressure;
in the process that the piston is continuously pulled upwards, the liquid sample exceeding the volume of the liquid quantitative area overflows outwards, falls to a water absorption structure between the liquid quantitative area and the inner side wall of the shell and is absorbed by the water absorption structure;
and fourthly, finally, the piston is pushed downwards, and the liquid sample in the liquid quantitative area is completely discharged to a required position (such as a diagnostic instrument such as a test paper), so that the accurate sampling of the liquid sample is completed.
Therefore, the simple blood precise quantitative sampling device provided by the invention at least has the following technical effects:
a. the blood precise quantitative sampling device integrally comprises a shell, a joint, a piston, a liquid quantitative area and a water absorption structure, wherein the piston, the liquid quantitative area and the water absorption structure are arranged in the inner cavity of the shell;
b. in the actual use process, the liquid sample is extracted and discharged through the piston, and the liquid sample can be accurately sampled by pulling and pushing, so that the operation is simple and convenient;
c. the excessive liquid sample exceeding the volume of the liquid quantitative area is absorbed through the water absorption structure, and the sample liquid discharged after the piston is pushed is the sample liquid stored in the liquid quantitative area.
d. The liquid sample filled in the liquid quantitative area is retained in the liquid quantitative area by utilizing the principle of atmospheric pressure, so that the volume of the liquid sample is accurately quantified, the bedside detection, the result quick output and the quick diagnosis are realized, and a more efficient way is provided for the diagnosis and treatment of patients.
In addition, the whole appearance of the blood precise quantitative sampling device is similar to that of a conventional injector, no additional pipeline or injection port is provided, the operation method is simple and rapid, and the device can be directly matched and connected with a test paper card for a conventional experiment without additional operation steps.
Drawings
FIG. 1 is a schematic view of a first embodiment of a simple blood precision quantitative sampling device;
FIG. 2 is a schematic diagram of a second embodiment of a simple blood precision quantitative sampling device in a first state;
FIG. 3 is a schematic diagram of a second state of a second embodiment of the simple blood precision quantitative sampling device;
description of reference numerals: 1. a one-way valve; 2. a housing; 3. a steering valve; 4. a water absorbing structure; 5. a piston; 6. a test paper card; 7. a liquid dosing zone; 8. a lower limit structure; 9. an upper limiting structure; 10. a test paper card sampling area; 11. and (4) a joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, in a first embodiment of the present invention, a simple blood precision quantitative sampling device comprises a housing 2, a piston 5 and a connector 11, wherein the piston 5 is slidably disposed in an inner cavity of the housing 2, the connector 11 is fixedly disposed at an end of the housing 2, and the inner cavity of the connector 11 is used for communicating the inner cavity of the housing 2 with the external environment. Specifically, when using this accurate quantitative sampling device of blood, from the supreme piston 5 that pulls down, at piston 5 slip in-process, the air volume increase in the 2 cavities of shell to make its air pressure diminish, the atmospheric pressure of external environment just impresses the liquid sample in the cavity of shell 2 through joint 11, accomplishes the extraction operation of liquid sample.
The simple blood precise quantitative sampling device also comprises a liquid quantitative area 7, the liquid quantitative area 7 is arranged in the inner cavity of the shell 2 and communicated with the inner cavity of the joint 11, and the liquid quantitative area 7 is used for quantitatively storing liquid. Wherein, the liquid quantitative area 7 is used for quantitatively preserving the liquid sample, and the specific principle is as follows: when the piston 5 is pulled to move upwards, the liquid sample in the external environment firstly enters the liquid quantifying area 7, and after the liquid sample in the liquid quantifying area 7 is filled, the liquid sample is retained in the liquid quantifying area 7 under the action of atmospheric pressure, so that the quantitative and accurate extraction of the volume of the liquid sample is realized.
The simple blood precise quantitative sampling device also comprises a water absorption structure 4, and the water absorption structure 4 is arranged between the liquid quantitative area 7 and the inner side wall of the shell 2. Wherein, water absorption structure 4 is used for absorbing the unnecessary liquid sample of suction in 2 inner chambers of shell, and the concrete principle is: the liquid sample pumped into the inner cavity of the shell 2 is filled with the liquid quantitative area 7 at first, and redundant liquid samples can overflow and fall to the water absorption structure 4, so that the redundant liquid samples are absorbed by the water absorption structure 4, and the sample liquid discharged after the piston is pushed is the sample liquid stored in the liquid quantitative area 7.
In general, the specific steps and principles of using the blood precision quantitative sampling device are as follows:
aligning a joint 11 at the end of the shell 2 with a liquid sample to be extracted, pulling the piston 5 upwards, and pumping the liquid sample into a cavity of the shell 2 through an inner cavity of the joint 11 in the process that the piston 5 moves from bottom to top;
secondly, the liquid sample entering the cavity of the shell 2 firstly enters the liquid quantitative area 7, and when the liquid sample in the liquid quantitative area 7 is full, the liquid sample is retained in the liquid quantitative area 7 under the action of atmospheric pressure;
in the process that the piston 5 is continuously pulled upwards, the liquid sample exceeding the volume of the liquid quantitative area 7 overflows outwards, falls to the water absorption structure 4 between the liquid quantitative area 7 and the inner side wall of the shell 2 and is absorbed by the water absorption structure 4;
and fourthly, finally, the piston 5 is pushed downwards, and the liquid sample in the liquid quantitative region 7 is completely discharged to a required position (such as a diagnostic instrument such as a test paper), so that accurate sampling of the liquid sample is finally completed.
Therefore, in the scheme of the first embodiment, the simple blood precise quantitative sampling device has a simple overall structure, can finish the precise sampling of the liquid sample by pulling and pushing when in use, and is simple and convenient to operate. Meanwhile, the liquid quantitative region 7 can realize accurate quantification of the volume of the liquid sample by utilizing the principle of atmospheric pressure, thereby providing solutions for various testing methods (for example, detection of the accurately quantified blood sample by various diagnostic test paper) which need to detect the accurately quantified liquid blood sample, further realizing bedside detection, rapid result output and rapid diagnosis, and providing a more efficient way for diagnosis and treatment of patients. In addition, the whole appearance of the blood precise quantitative sampling device is similar to that of a conventional injector, no additional pipeline or injection port is provided, the operation method is simple and rapid, and the device can be directly matched and connected with a test paper card for a conventional experiment without additional operation steps.
In a further scheme of the embodiment, a raised structure is fixedly arranged in the inner cavity of the housing 2, and a containing space formed by the inner cavity of the raised structure is the liquid quantifying area 7. In this further embodiment, the liquid quantitative region 7 is a containing space formed by a cavity of a protrusion structure formed in the cavity of the housing 2, and more specifically, in the structural arrangement, the protrusion structure is connected to the joint 11, so that the cavity of the protrusion structure is communicated with the cavity of the joint 11, that is, the liquid quantitative region 7 is communicated with the cavity of the joint 11, and it is ensured that the liquid sample drawn from the external environment first enters the liquid quantitative region 7 after passing through the cavity of the joint 11. When the liquid sample in the liquid quantitative area 7 is filled, the liquid sample is retained in the liquid quantitative area 7 under the action of the atmospheric pressure, and the accurate quantitative determination of the volume of the liquid sample is realized.
In a preferred version of this first embodiment, the fitting 11 is a male luer fitting. In particular, external luer is also known as luer and is a standardized, micro, non-leaking connector that is widely used in medical and laboratory instruments. In embodiments of the present invention, the male luer connector has ease of connection and compatibility between different products.
In another preferred version of this embodiment, the absorbent structure 4 is an absorbent sponge. Particularly, the water-absorbing sponge is a porous material made of wood cellulose fiber or foamed plastic polymer, has good flexibility and water-absorbing performance, and can be conveniently installed and assembled between the liquid quantifying area 7 and the inner side wall of the shell 2 in the production and manufacturing process; and the liquid absorption performance is good, redundant liquid samples overflowing from the liquid quantitative area 7 are fully absorbed, and the sample liquid discharged after the piston is pushed is the sample liquid stored in the liquid quantitative area.
Example two:
referring to fig. 2 and 3, in a second embodiment of the present invention, the simple blood precise quantitative sampling device further includes a test paper card 6, wherein the test paper card 6 is disposed adjacent to the outer sidewall of the housing 2, an intermediate channel is disposed between the test paper card 6 and the liquid quantitative section 7, and the test paper card 6 is communicated with the intermediate channel. In the embodiment, the connector 11 is connected to a device such as a needle or a catheter which is inserted into a human body, and during the process of pulling the piston 5 from bottom to top, blood liquid in the device such as the needle or the catheter enters the inner cavity of the housing 2 through the connector 11 under the pressure of atmospheric pressure. Specifically, since a certain amount of tube sealing liquid exists in the needle or the catheter, the tube sealing liquid is generally extracted from the beginning, and the tube sealing liquid is absorbed by the water absorbing structure 4 after entering the inner cavity of the housing 2. More specifically, the blood liquid drawn later fills the liquid quantitative section 7 and stays in the liquid quantitative section 7 under the principle of atmospheric pressure, so that the blood liquid volume is quantitatively and accurately drawn. Further, the test paper card 6 provided on the outer sidewall of the housing 2 is a diagnostic test paper for detecting a precisely quantified blood sample. After blood in the needle tube or the catheter and other instruments is pumped into the liquid quantifying area 7 to complete the quantification of the blood liquid, the piston 5 is pushed downwards to discharge the blood liquid in the blood quantifying area 7 onto the test paper card, so that the detection of the blood sample is completed.
In a preferred version of this second embodiment, the connector 11 is also a male luer connector. In this embodiment of the present invention, the external luer has the simplicity of connection and compatibility between different products, and since the amount of blood in the liquid quantifying section 7 is affected by the pressure change after the blood pressure in the body is removed, the blood in the liquid quantifying section 7 can be guided to a desired direction before the pressure change by rotating the diverter valve 3 before the external luer is removed from the catheter in the body, and the external luer of this embodiment can be easily connected to an instrument such as a catheter, an indwelling needle, or an injection needle indwelling in a blood vessel, thereby effectively solving this problem.
In a preferred embodiment of the present invention, the simple blood precise quantitative sampling device further comprises a diverting valve 3, and the diverting valve 3 is disposed in the liquid quantitative region 7. When the opening of the steering valve 3 faces the liquid quantitative area 7 and the joint 11 respectively, the inner cavities of the liquid quantitative area 7 and the joint 11 are communicated; when the opening of the diverter valve 3 is directed to the liquid dosing zone 7 and the intermediate channel, respectively, the liquid dosing zone 7 and the intermediate channel are in communication. In the preferred embodiment, the steering valve 3 is rotated to switch different use states of the blood precise quantitative sampling device, so as to control different flow directions of the blood liquid in the liquid quantitative region 7, specifically as follows:
referring to fig. 2, the opening of the diverter valve 3 faces the liquid quantitative section 7 and the joint 11 respectively, and connects the inner cavities of the liquid quantitative section 7 and the joint 11, which is the drawing state of the blood precise quantitative sampling device. Specifically, since the liquid quantitative section 7 is communicated with the inner cavity of the joint 11, the piston 5 is pulled, and in the process of sliding the piston 5 from bottom to top, the blood liquid inserted into the needle tube or catheter of the human body moves upwards under the pressure of the atmospheric pressure, passes through the inner cavity of the joint 11 and the liquid quantitative section 7 in sequence, and stays in the liquid quantitative section 7, thereby completing the blood liquid drawing operation.
Referring to fig. 3, when the opening of the diverter valve 3 faces the liquid quantitative section 7 and the middle channel, respectively, the liquid quantitative section 7 is communicated with the middle channel, and the liquid discharge state of the blood precise quantitative sampling device is obtained. Specifically, the liquid quantitative area 7 is communicated with the middle channel, namely communicated with the test paper card 6 outside the shell 2, the steering valve 3 is rotated to push the piston 5, in the process that the piston 5 slides from top to bottom, the blood liquid stored in the liquid quantitative area 7 moves to the side edge under the pressure of the air in the cavity of the shell 2, and finally is discharged to the test paper card 6 communicated with the middle channel after passing through the liquid quantitative area 7 and the middle channel in sequence, and the test paper card 6 is used for detecting the accurately quantitative blood sample. Meanwhile, the influence of the blood pressure in the human body on the blood stored in the liquid quantitative section 7 can be solved by rotating the diverter valve 3.
In a further scheme of this embodiment, a test paper card sampling area 10 is provided on the test paper card 6, and the test paper card sampling area 10 and the middle channel are correspondingly provided. Specifically, the test card sampling area 10 is a partial sampling area provided on the test card 6, which is provided in correspondence with the intermediate passage in the horizontal direction. When the steering valve 3 is switched to a liquid discharge state, the piston 5 is pushed, blood liquid is discharged from the liquid quantitative area 7 to the middle channel and then is discharged from the middle channel to the test paper card sampling area 10, and the detection and diagnosis of the blood sample are completed by the test paper card sampling area 10.
In a further aspect of this embodiment, the simple blood precise quantitative sampling device further comprises a one-way valve 1, the one-way valve 1 is disposed in the inner cavity of the joint 11, wherein the one-way valve 1 is used for preventing the liquid in the joint 11 and the liquid quantitative region 7 from flowing backwards, and preventing air in the cavity from entering the human body by mistake. Specifically, in the embodiment, the blood precision quantitative sampling device is connected to an instrument such as a needle tube or a catheter to draw blood from a human body. If the check valve 1 is not provided, the blood liquid sucked into the liquid quantitative section 7 from the connector 11 is discharged from the inner cavity of the connector 11 again under the pressure of the blood pressure in the body, so that the phenomenon of blood liquid backflow occurs, and the blood liquid preservation effect of the liquid quantitative section 7 cannot be realized. Therefore, in the embodiment of the present invention, the one-way valve 1 is provided to ensure that the blood liquid drawn from the needle or catheter or other instrument can only flow into the liquid quantitative section 7 from the inner cavity of the connector 11, but cannot flow back to the connector 11 from the liquid quantitative section 7, so as to prevent the blood liquid sucked into the inner cavity of the housing 2 from flowing back into the needle or catheter or other instrument, so that the liquid quantitative section 7 has the function of preserving the blood liquid, and the quantitative and accurate drawing of the blood liquid volume is realized.
In an alternative of this embodiment, the inner cavity of the housing 2 is provided with a lower limit structure 8 and an upper limit structure 9, the lower limit structure 8 is arranged at the bottom of the upper limit structure 9, the lower limit structure 8 is used for blocking the piston 5 from sliding downwards, and the upper limit structure 9 is used for blocking the piston 5 from sliding upwards. In this alternative, the upper and lower limit structures 9 and 8 are respectively disposed at upper and lower positions of the inner cavity of the housing 2 so as to block the up-and-down sliding of the piston 5. More specifically, a certain distance is arranged between the upper limit structure 9 and the lower limit structure 8, and the distance is the moving distance of the piston 5, in the scheme of the embodiment, the distance between the upper limit structure 9 and the lower limit structure 8 is set to be a preset value, so that the redundant catheter sealing liquid and blood extracted from instruments such as a needle tube or a catheter are ensured to be in the absorbable range of the water absorption structure 4, and the volume of the blood sample discharged after the piston 5 is pushed is ensured to be the volume of the blood sample accurately and quantitatively stored in the liquid quantitative region 7.
Further, the lower limit structure 8 and the upper limit structure 9 are both annular convex structures arranged on the inner side wall of the housing 2. Particularly, set up annular protruding structure respectively through the upper and lower position at shell 2 inside wall, can realize the spacing effect of blockking of piston 5 up-and-down motion, this kind of structural design mode is simple and convenient, and can realize the good spacing effect of blockking. More specifically, in the production and manufacturing process of the blood precise quantitative sampling device, the annular convex structures at the upper and lower positions can be directly formed on the inner side wall of the shell 2 through a machining process, so that the lower limit structure 8, the upper limit structure 9 and the shell 2 are integrally formed, the assembly process between the shell 2 and the limit structure is saved, and the structural design is reasonable.
In summary, the simple blood precise quantitative sampling device provided by the invention has a simple overall structure and no special use method, and when in use, the connector 11 can be directly connected with apparatuses such as a catheter, an indwelling needle or an injection needle in a blood vessel, so as to directly extract a precise quantitative blood sample from a human body, and provide a solution for various tests (such as various diagnostic test paper for detecting the precise quantitative blood sample) which need to be detected by the precise quantitative blood sample, thereby realizing bedside detection, rapid result output and rapid diagnosis, and providing a more efficient way for diagnosis and treatment of patients. In addition, the whole appearance of the blood precise quantitative sampling device is similar to that of a conventional injector, no additional pipeline or injection port is provided, the operation method is simple and rapid, and the device can be directly matched and connected with a test paper card for a conventional experiment without additional operation steps.
Of course, the above is a preferred embodiment of the present invention. It should be noted that, for a person skilled in the art, several modifications and refinements can be made without departing from the basic principle of the invention, and these modifications and refinements are also considered to be within the protective scope of the invention.
Claims (10)
1. The utility model provides a simple and easy accurate quantitative sampling device of blood which characterized in that includes:
the piston is slidably arranged in an inner cavity of the shell, the joint is fixedly arranged at the end part of the shell, and the inner cavity of the joint is used for communicating the inner cavity of the shell with the external environment;
the liquid quantitative area is arranged in the inner cavity of the shell and communicated with the inner cavity of the joint, and the liquid quantitative area is used for quantitatively storing liquid;
a water absorbing structure disposed between the liquid metering zone and the inner sidewall of the housing.
2. The simple blood precise quantitative sampling device of claim 1, wherein a protrusion structure is fixed in the inner cavity of the housing, and the accommodating space formed by the inner cavity of the protrusion structure is the liquid quantitative region.
3. The simplified blood precision quantitative sampling device of claim 2, wherein the connector is a male luer connector.
4. The simple blood precision quantitative sampling device of claim 2, wherein the water absorbing structure is a water absorbing sponge.
5. The simple blood precise quantitative sampling device of claim 2, further comprising a test paper card, wherein the test paper card is disposed adjacent to the outer sidewall of the housing, a middle channel is disposed between the test paper card and the liquid quantitative region, and the test paper card is communicated with the middle channel.
6. The simplified blood precision quantitative sampling device according to claim 5, further comprising a diverter valve disposed in the liquid quantitative section, wherein:
when the opening of the steering valve faces the liquid quantifying area and the joint respectively, the liquid quantifying area is communicated with the inner cavity of the joint;
when the opening of the diverter valve faces the liquid metering area and the intermediate passage, the liquid metering area and the intermediate passage are communicated.
7. The simple blood precise quantitative sampling device of claim 6, wherein a test paper card sampling area is provided on the test paper card, and the test paper card sampling area and the middle channel are arranged correspondingly.
8. The simplified blood precision quantitative sampling device of claim 7, further comprising a one-way valve disposed in the inner cavity of the connector, the one-way valve being configured to prevent backflow of the liquid in the connector and the liquid quantitative region.
9. The simple blood precise quantitative sampling device of claim 2, wherein the inner cavity of the housing is provided with a lower limit structure and an upper limit structure, the lower limit structure is arranged at the bottom of the upper limit structure, the lower limit structure is used for blocking the piston from sliding downwards, and the upper limit structure is used for blocking the piston from sliding upwards.
10. The simplified blood precision quantitative sampling device of claim 9, wherein the lower limit structure and the upper limit structure are both annular protruding structures disposed on the inner side wall of the housing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011351391.3A CN112461602A (en) | 2020-11-27 | 2020-11-27 | Simple and easy accurate quantitative sampling device of blood |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011351391.3A CN112461602A (en) | 2020-11-27 | 2020-11-27 | Simple and easy accurate quantitative sampling device of blood |
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| CN112461602A true CN112461602A (en) | 2021-03-09 |
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| CN202011351391.3A Pending CN112461602A (en) | 2020-11-27 | 2020-11-27 | Simple and easy accurate quantitative sampling device of blood |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103153199A (en) * | 2010-10-15 | 2013-06-12 | 金伯利-克拉克环球有限公司 | Device for bodily fluids |
| CN104826679A (en) * | 2014-11-09 | 2015-08-12 | 韦伟 | Pipette tip and pipette therewith |
| WO2020063795A1 (en) * | 2018-09-28 | 2020-04-02 | 湖南乐准智芯生物科技有限公司 | Biochip, micro liquid sample loading structure thereof, and micro quantitative sampling method |
| CN111839549A (en) * | 2020-07-06 | 2020-10-30 | 广东昊朗医疗科技有限责任公司 | Device for accurately and quantitatively extracting blood sample |
| CN214121692U (en) * | 2020-11-27 | 2021-09-03 | 广东昊朗医疗科技有限责任公司 | Simple and easy accurate quantitative sampling device of blood |
-
2020
- 2020-11-27 CN CN202011351391.3A patent/CN112461602A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103153199A (en) * | 2010-10-15 | 2013-06-12 | 金伯利-克拉克环球有限公司 | Device for bodily fluids |
| CN104826679A (en) * | 2014-11-09 | 2015-08-12 | 韦伟 | Pipette tip and pipette therewith |
| WO2020063795A1 (en) * | 2018-09-28 | 2020-04-02 | 湖南乐准智芯生物科技有限公司 | Biochip, micro liquid sample loading structure thereof, and micro quantitative sampling method |
| CN111839549A (en) * | 2020-07-06 | 2020-10-30 | 广东昊朗医疗科技有限责任公司 | Device for accurately and quantitatively extracting blood sample |
| CN214121692U (en) * | 2020-11-27 | 2021-09-03 | 广东昊朗医疗科技有限责任公司 | Simple and easy accurate quantitative sampling device of blood |
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