CN111870259A - Animal blood serum separating needle - Google Patents
Animal blood serum separating needle Download PDFInfo
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- CN111870259A CN111870259A CN202010764975.7A CN202010764975A CN111870259A CN 111870259 A CN111870259 A CN 111870259A CN 202010764975 A CN202010764975 A CN 202010764975A CN 111870259 A CN111870259 A CN 111870259A
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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
- A61B5/150007—Details
- A61B5/150755—Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
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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
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/15003—Source of blood for venous or arterial blood
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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
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
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- Animal Behavior & Ethology (AREA)
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a blood serum separating needle for collecting animal blood, which comprises a needle body, a filtering membrane and a collecting container, wherein the needle body comprises a needle tube and a piston main body, and the needle body is provided with a liquid inlet arranged on the needle tube, a liquid outlet arranged on the piston main body and a liquid storage cavity communicated with the liquid inlet and the liquid outlet; the filtering membrane is used for filtering serum in blood in the first cavity into the second cavity; the collection container is connected to the second chamber in an on-off manner. In the invention, the liquid inlet is formed on the needle tube, and the liquid outlet is formed on the piston main body, so that the direct circulation of blood or serum in the liquid storage cavity is facilitated while the liquid storage space of the liquid storage cavity is enlarged; the filtering membrane is arranged in the liquid storage cavity, and blood can be directly separated without transferring blood; the collection container can be connected with the second chamber in an on-off mode, and after serum is fully separated out, the serum can be directly collected through the connection of the second chamber. The invention has the advantages of convenient operation and effective avoidance of sample pollution.
Description
Technical Field
The invention relates to the technical field of animal blood collection, in particular to a serum separation needle for animal blood collection.
Background
At present, the method for obtaining animal serum generally comprises the steps of firstly, utilizing a syringe to draw an animal blood sample; then transferring the extracted animal blood sample to a centrifuge tube, placing the centrifuge tube in a centrifuge for separating serum, or standing in a blood collection tube for layering; finally, the separated serum is sucked out by a detector by using a pipette or a pipette and transferred to a sample tube for storage. The existing mode for obtaining the animal serum needs to transfer the sample for many times, and the process is complicated, so that the sample is easily polluted, and the detection result is influenced.
Disclosure of Invention
The invention mainly aims to provide a serum separation needle for animal blood collection, and aims to solve the problem that the process of obtaining animal serum in the traditional technology is complicated.
In order to achieve the above object, the present invention provides a blood serum separating needle for animal blood collection, comprising:
the needle body comprises a needle tube and a piston main body movably arranged in the needle tube along the inner direction and the outer direction, and the needle body is provided with a liquid inlet arranged on the needle tube, a liquid outlet arranged on the piston main body and a liquid storage cavity communicated with the liquid inlet and the liquid outlet;
the filtering membrane is arranged in the liquid storage cavity to divide the liquid storage cavity into a first cavity and a second cavity which are sequentially arranged along the liquid passing direction, and the filtering membrane is used for filtering serum in blood in the first cavity into the second cavity; and the number of the first and second groups,
a collection container, which is connected with the second chamber in an on-off manner.
Optionally, the needle tube has an inlet lumen;
the filtering membrane is arranged in the liquid inlet cavity at intervals.
Optionally, the needle tube has an inlet lumen;
the piston main body is internally and externally provided with a liquid passing channel in a penetrating manner, an inlet of the liquid passing channel is communicated with the liquid inlet cavity, and an outlet of the liquid passing channel forms the liquid outlet;
the filtering membrane is arranged on the liquid passing channel.
Optionally, the filtering membrane is detachably mounted at the inner end of the piston main body and covers the inlet of the liquid passing channel.
Optionally, an annular groove is formed in the inner end surface of the piston main body around the outlet of the liquid passing channel;
the animal blood collection serum separation needle further comprises a mounting ring, wherein the mounting ring is clamped in the annular groove so as to limit the peripheral side part of the filtering membrane together with the annular groove.
Optionally, a first baffle plate is arranged at an inlet of the liquid passing channel of the piston main body, and the first baffle plate is provided with a plurality of first through holes for communicating the liquid inlet cavity with the liquid passing channel;
the filtering membrane is arranged on the inner side surface of the first baffle plate.
Optionally, the piston body comprises a piston head and a piston rod, the piston head is provided with a threaded hole along the inner direction and the outer direction, the piston rod is provided with the liquid passing channel along the inner direction and the outer direction, and the inlet end of the piston rod is provided with the first baffle;
the piston rod is in threaded fit with the threaded hole, so that the distance between the first baffle and the filtering membrane is adjusted by adjusting the threaded depth of the piston rod and the threaded hole.
Optionally, the piston body comprises a piston head and a piston rod, the piston head is provided with a threaded hole along the inner and outer directions, the inner end of the threaded hole is provided with the first baffle, the piston rod is provided with the liquid passing channel along the inner and outer directions, the inlet end of the piston rod is provided with a second baffle, and the second baffle is provided with a plurality of second through holes communicating the liquid inlet cavity and the liquid passing channel;
the piston rod is in threaded connection with the threaded hole, so that the second baffle has a conducting state in which the second through hole is communicated with the first through hole in a rotating mode and a covering state in which the second through hole is closed with the first through hole.
Optionally, the piston hole is provided with a first limit portion, and the piston rod is provided with a first matching portion, so that when the first matching portion rotates to abut against the first limit portion, the second baffle is in the covering state; and/or the presence of a gas in the gas,
the piston hole is provided with a second limiting part, the piston rod is provided with a second matching part, and when the second matching part rotates to abut against the second limiting part, the second baffle is in the conduction state.
Optionally, the collection container is removably attached to the outer end of the piston body.
According to the technical scheme provided by the invention, the liquid inlet is formed in the needle tube, and the liquid outlet is formed in the piston main body, so that the direct circulation of blood or serum in the liquid storage cavity is facilitated while the liquid storage space of the liquid storage cavity is enlarged; the filtering membrane is arranged in the liquid storage cavity, and blood can be directly separated without transferring the blood; the collection container can be connected with the second chamber in an on-off mode, and after serum is fully separated out, the serum can be directly collected through the connection of the second chamber. The invention has the advantages of convenient operation and effective avoidance of sample pollution.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of an embodiment of a blood and serum separation needle for animal blood collection according to the present invention, wherein the second baffle is in a covering state;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the blood and serum separating needle for animal blood collection shown in FIG. 1, wherein the second baffle is in a conducting state;
FIG. 4 is an enlarged schematic view at B of FIG. 3;
fig. 5 is an enlarged schematic view at C in fig. 4.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Animal blood |
22 | Piston |
| 10 | |
221 | |
| 11 | |
222 | |
| 12 | |
223 | |
| 21 | Piston |
224 | Second via |
| 211 | |
30 | |
| 212 | |
40 | Collection container |
| 213 | A |
50 | Mounting ring |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
At present, the method for obtaining animal serum generally comprises the steps of firstly, utilizing a syringe to draw an animal blood sample; then transferring the extracted animal blood sample to a centrifuge tube, and then placing the centrifuge tube in a centrifuge for separating serum or standing in a blood collection tube for layering; finally, the separated serum is sucked out by a detector by using a pipette or a pipette and transferred to a sample tube for storage. The existing mode for obtaining the animal serum needs to transfer the sample for many times, and the process is complicated, so that the sample is easily polluted, and the detection result is influenced.
In view of the above, the present invention provides a blood and serum separating needle for animal blood collection, and fig. 1 to 5 are embodiments of the blood and serum separating needle for animal blood collection provided by the present invention.
The invention provides a serum separating needle 100 for collecting animal blood, which is mainly used for collecting animal blood and obtaining serum in the animal blood.
Referring to fig. 1 to 4, the blood serum separating needle 100 for animal blood collection comprises a needle body, a filtering membrane 30 and a collection container 40, wherein the needle body comprises a needle tube 10 and a piston main body movably arranged in the needle tube 10 along the inner and outer directions, and the needle body comprises a liquid inlet 11 arranged on the needle tube 10, a liquid outlet 221 arranged on the piston main body, and a liquid storage cavity communicating the liquid inlet 11 and the liquid outlet 221; the filtering membrane 30 is arranged in the liquid storage cavity to divide the liquid storage cavity into a first cavity and a second cavity which are sequentially arranged along a liquid passing direction, and the filtering membrane 30 is used for filtering serum in blood in the first cavity into the second cavity; the collection container 40 is switchably connected to the second chamber.
In the technical scheme provided by the invention, the liquid inlet 11 is formed on the needle tube 10, and the liquid outlet 221 is formed on the piston main body, so that the direct circulation of blood or serum in the liquid storage cavity is facilitated while the liquid storage space of the liquid storage cavity is enlarged; the filtering membrane 30 is arranged in the liquid storage cavity, and blood can be directly separated without transferring the blood; the collection container 40 can be connected with the second chamber in a break-and-break mode, and after the serum is sufficiently separated out, the serum can be directly collected by connecting the second chamber. The invention has the advantages of convenient operation and effective avoidance of sample pollution.
The specific structure of the needle body can refer to the existing injector, and generally comprises a needle tube 10 and a piston main body, wherein the needle tube 10 is provided with a liquid inlet 11 positioned at the top end, and the liquid inlet 11 is detachably connected with a needle head with a required specification; the needle tube 10 is generally cylindrical, and a liquid inlet cavity 12 is formed in the needle tube 10; the piston main body comprises a piston head 21 and a piston rod 22, and the piston head 21 is accommodated in the liquid inlet cavity 12 and is in piston fit with the liquid inlet cavity 12; the piston rod 22 is connected with the piston head 21, and at least part of the piston rod extends out of the liquid inlet cavity 12, so that the holding operation of an operator is facilitated.
The piston body is reciprocally movable along a predetermined path in the inlet chamber 12, and for convenience of understanding, the piston body is reciprocally movably installed in the inlet chamber 12 along an inward and outward direction, and a direction from the piston head 21 to the piston rod 22 in the piston body is from the inside to the outside.
The design is different from a conventional injector, a liquid passing channel 222 communicated with the liquid inlet cavity 12 is formed in the piston body, specifically, the liquid passing channel 222 penetrates through the piston body along the inner and outer directions, the liquid passing channel 222 is provided with an inlet, the inlet can be arranged at the inner end of the piston head 21, and the inlet of the liquid passing channel 222 is communicated with the liquid inlet cavity 12 of the needle tube 10; the liquid passing channel 222 is provided with an outlet, which may be disposed at the outer end of the piston rod 22, and the outlet of the liquid passing channel 222 constitutes the liquid outlet 221. The liquid inlet cavity 12 and the liquid passing channel 222 together form the liquid storage cavity, which is helpful to expand the liquid storage space in the limited needle body as much as possible, so as to further expand the liquid storage spaces of the first chamber and the second chamber, and more blood can be supplied to filter out serum more fully each time.
The filtering membrane 30 divides the first chamber and the second chamber, so that after the needle is inserted into the blood vessel of the animal, the animal blood enters the first chamber from the liquid inlet 11 under the action of the piston main body, and after the standing for a preset time and a preset angle, only the serum enters the second chamber through the filtering membrane 30 under the action of the filtering membrane 30, so that the filtering of the serum is realized. The specific selection of the filter membrane 30 can be made with reference to the prior art and will not be described in detail here.
The collection container 40 may be any size, any purpose container, such as a serum sample tube; the collection container 40 is detachably connected with the piston rod 22 of the piston main body, so that the collection container 40 can be conveniently detached and replaced; the collection container 40 is connected to the second chamber through a channel by changing the relative position relationship with the piston rod 22 or through an additional structure such as a control valve, so that the collection container 40 is disconnected from the second chamber when the blood in the first chamber is not fully acted, i.e. the serum in the second chamber is not completely obtained; on the contrary, when the blood in the first chamber is fully used, that is, the serum in the second chamber is completely obtained, the collection container 40 is communicated with the second chamber, so that the centralized collection and treatment of the serum are facilitated, and the possibility of contamination and deterioration of the serum can be reduced.
The filtering membrane 30 is disposed in the liquid storage cavity, and in an embodiment, the filtering membrane 30 is disposed in the liquid inlet cavity 12 and spaced from the liquid inlet 11. The filter membrane 30 may be fixedly mounted to the inner cavity wall of the needle cannula 10, or may be adjustably mounted to the inner cavity wall of the needle cannula 10 in an up-down direction by means of, for example, a slide groove and slider structure. The filter membrane 30 is arranged in the liquid inlet chamber 12, so that the first chamber has a fixed space size and can draw a set amount of animal blood.
In another embodiment, the filter membrane 30 is disposed in the liquid passing channel 222, and may be disposed at an inlet of the liquid passing channel 222, a middle portion of the liquid passing channel 222, and the liquid outlet 221. Positioning the filter membrane 30 at the piston body such that pressure changes within the reservoir chamber caused by piston movement of the piston body do not substantially affect the filter membrane 30, helping to extend the useful life of the filter membrane 30; in addition, the filter membrane 30 is disposed at the piston body, so that the filter membrane 30 can be more easily detached and replaced when the piston body is withdrawn from the needle tube 10.
For the sake of understanding, the filter membrane 30 is disposed in the liquid passing channel 222 as an example.
Specifically, in this embodiment, the filter membrane 30 is detachably mounted at the inner end of the piston main body and covers the inlet of the liquid passing channel 222. Compared with the technical scheme that the filter membrane 30 is arranged in the middle of the liquid passing channel 222, the filter membrane 30 is arranged at the inlet of the liquid passing channel 222, so that the filter membrane is easier to disassemble, assemble and replace; compared with the technical scheme that the filter membrane 30 is arranged at the liquid outlet 221, the filter membrane 30 arranged at the inlet of the liquid passing channel 222 can effectively enlarge the liquid storage space of the second chamber, and the sufficient filtering-out of the serum is facilitated.
The filter membrane 30 is mounted on the piston body in various ways, such as being fixed by adhesion, but in order to avoid introducing other interfering impurities into blood or serum, please refer to fig. 3 to 5, in this embodiment, an annular groove 211 is formed on the inner end surface of the piston body around the outlet of the liquid passing channel 222; the animal blood collection and serum separation needle 100 further comprises a mounting ring 50, wherein the mounting ring 50 is clamped in the annular groove 211 so as to limit the peripheral side part of the filter membrane 30 together with the annular groove 211. The material of the mounting ring 50 is the same as that of the piston head 21, and when the mounting ring 50 and the annular groove 211 are arranged to limit the outer peripheral side of the filter membrane 30, the inner end surface of the mounting ring 50 is flush with or smoothly transited to the inner end surface of the piston head 21, so that interference on the piston movement of the piston head 21 is avoided. Of course, the material of the mounting ring 50 may be selected to be different from the material of the piston head 21, and is stronger than the piston head 21, so as to enhance the strength of the piston head. The installation ring 50 and the annular groove 211 are arranged, so that the filter membrane 30 can be quickly assembled and disassembled.
Because the filter membrane 30 is soft, when the filter membrane 30 covers the inlet of the liquid passing channel 222, the part of the filter membrane 30 corresponding to the inlet of the liquid passing channel 222 is in a suspended state, and is easily damaged by the influence of the pressure change in the liquid storage cavity.
In view of the above, in an embodiment, the piston body is provided with a first baffle plate 212 at the inlet of the liquid passing channel 222, and the first baffle plate 212 is provided with a plurality of first through holes 213 for communicating the liquid inlet chamber 12 and the liquid passing channel 222; the filter membrane 30 is provided on the inner side surface of the first baffle 212. The first through hole 213 can realize the communication between the liquid passing channel 222 and the liquid inlet chamber 12, and at the same time, the first baffle 212 can support the filter membrane 30, which helps to reduce the influence of the pressure change in the liquid storage chamber on the filter membrane 30.
The first baffle 212 may be disposed on the piston head 21, specifically, in an embodiment, the piston head 21 has a threaded hole extending in the inner and outer directions, and the inlet end of the piston rod 22 is provided with the first baffle 212; the piston rod 22 is screwed with the threaded hole, so that the distance between the first baffle 212 and the filter membrane 30 can be adjusted by adjusting the screwing depth of the piston rod and the threaded hole. By arranging the piston rod 22 to be in threaded fit with the threaded hole, the piston rod 22 and the piston head 21 can be detachably connected, and the piston rod 22 simultaneously has a movable stroke rotating along the axis thereof and a movable stroke moving in the inner and outer directions, so that before the animal blood collection and serum separation needle 100 extracts animal blood, namely the piston body moves in the inner and outer directions to form negative pressure in the liquid storage cavity, the piston head 21 is adjusted to be screwed in towards the piston head 21 direction, namely the first baffle 212 is adjusted to approach the filtering membrane 30 until the first baffle abuts against the filtering membrane 30, and the filtering membrane 30 is supported and protected; on the contrary, when the animal blood collection and serum separation needle 100 has completed the blood drawing operation and needs to be placed still for filtering out serum in blood, the piston head 21 can be adjusted to be screwed out in a direction away from the piston head 21, that is, the first baffle 212 is adjusted to move in a direction away from the filtering membrane 30, so as to increase the distance between the first baffle 212 and the filtering membrane 30, and prevent the filtering effect of the filtering membrane 30 from being reduced by the part of the first baffle 212 not provided with the first through hole 213.
Alternatively, the first baffle 212 may be disposed on the piston rod 22, please refer to fig. 1 to 4, in this embodiment, a threaded hole is formed through the piston head 21 along the inner and outer directions, the inner end of the threaded hole is provided with the first baffle 212, the piston rod 22 is provided with the liquid passing channel 222 along the inner and outer directions, the inlet end of the piston rod 22 is provided with a second baffle 223, and the second baffle 223 is provided with a plurality of second through holes 224 communicating the liquid inlet chamber 12 and the liquid passing channel 222; the piston rod 22 is screwed with the threaded hole, so that the second baffle 223 has a conducting state that rotates to the second through hole 224 to communicate with the first through hole 213, and a covering state that the second through hole 224 and the first through hole 213 are closed. When the first baffle 212 is fixedly installed on the piston hole and the second baffle 223 is arranged on the piston rod 22, the second baffle 223 can rotate and move in and out under the driving of the piston rod 22, wherein the rotation of the second baffle 223 can realize the switching between the conduction state and the covering state, that is, the on-off connection between the collection container 40 and the second chamber is indirectly realized; the extension and expansion of the second chamber space can be realized by the inward and outward movement of the second barrier 223.
It should be noted that the arrangement manner of the first through holes 213 on the first baffle 212 and the arrangement manner of the second through holes 224 on the second baffle 223 may be the same, so that when the first baffle 212 and the second baffle 223 are overlapped, the first through holes 213 and the second through holes 224 are respectively communicated, and the second baffle 223 is in a conducting state; on the contrary, when the first barrier 212 and the second barrier 223 are misaligned by a certain angle, the first through holes 213 and the second through holes 224 are respectively misaligned and blocked, and the second barrier 223 is in a covering state. Specifically, the circular end surface of the first baffle 212 may be divided into a plurality of sector areas, wherein a part of the sector areas are hollowed out to form the first via holes 213; the second baffle 223 and the second through hole 224 are suitable for the first baffle 212 and the first through hole 213 to be disposed.
Next, in this embodiment, the piston hole is provided with a first position-limiting portion, and the piston rod 22 has a first matching portion, so that when the first matching portion rotates to abut against the first position-limiting portion, the second baffle 223 is in the covering state; and/or, the piston hole is provided with a second limit portion, and the piston rod 22 has a second matching portion, so that when the second matching portion rotates to abut against the second limit portion, the second baffle 223 is in the conducting state. The first limiting part and the second limiting part can limit the specific stroke of the rotation and the movement of the piston rod 22, and accurately limit the position of the second baffle 223 when the second baffle 223 reaches the covering state and the position of the second baffle 223 when the second baffle 223 reaches the conducting state, so that the manual operation of an operator is facilitated. The first and second position-limiting portions are, for example, position-limiting protrusions protruding into the threaded holes, and will not be described in detail herein.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An animal blood collection serum separation needle, comprising:
the needle body comprises a needle tube and a piston main body movably arranged in the needle tube along the inner direction and the outer direction, and the needle body is provided with a liquid inlet arranged on the needle tube, a liquid outlet arranged on the piston main body and a liquid storage cavity communicated with the liquid inlet and the liquid outlet;
the filtering membrane is arranged in the liquid storage cavity to divide the liquid storage cavity into a first cavity and a second cavity which are sequentially arranged along the liquid passing direction, and the filtering membrane is used for filtering serum in blood in the first cavity into the second cavity; and the number of the first and second groups,
a collection container, which is connected with the second chamber in an on-off manner.
2. The needle for separating serum from animal blood according to claim 1, wherein said needle tube has an inlet chamber;
the filtering membrane is arranged in the liquid inlet cavity at intervals.
3. The needle for separating serum from animal blood according to claim 1, wherein said needle tube has an inlet chamber;
the piston main body is internally and externally provided with a liquid passing channel in a penetrating manner, an inlet of the liquid passing channel is communicated with the liquid inlet cavity, and an outlet of the liquid passing channel forms the liquid outlet;
the filtering membrane is arranged on the liquid passing channel.
4. The needle for separating serum from animal blood according to claim 3, wherein the filter membrane is detachably mounted on the inner end of the piston body and covers the inlet of the liquid passing passage.
5. The needle for separating serum from animal blood according to claim 4, wherein the inner end surface of the piston body is provided with an annular groove around the outlet of the liquid passing channel;
the animal blood collection serum separation needle further comprises a mounting ring, wherein the mounting ring is clamped in the annular groove so as to limit the peripheral side part of the filtering membrane together with the annular groove.
6. The animal blood collection and serum separation needle as claimed in claim 5, wherein the piston body is provided with a first baffle plate at an inlet of the liquid passing channel, the first baffle plate being provided with a plurality of first through holes communicating the liquid inlet chamber and the liquid passing channel;
the filtering membrane is arranged on the inner side surface of the first baffle plate.
7. The needle for separating serum from animal blood collection according to claim 5, wherein the piston body comprises a piston head and a piston rod, the piston head is provided with a threaded hole along the inner and outer directions, the piston rod is provided with the liquid passing channel along the inner and outer directions, and the inlet end of the piston rod is provided with the first baffle;
the piston rod is in threaded fit with the threaded hole, so that the distance between the first baffle and the filtering membrane is adjusted by adjusting the threaded depth of the piston rod and the threaded hole.
8. The needle for separating serum from animal blood collection according to claim 5, wherein the piston body comprises a piston head and a piston rod, the piston head is provided with a threaded hole along the inner and outer directions, the inner end of the threaded hole is provided with the first baffle, the piston rod is provided with the liquid passing channel along the inner and outer directions, the inlet end of the piston rod is provided with a second baffle, and the second baffle is provided with a plurality of second through holes communicating the liquid inlet cavity and the liquid passing channel;
the piston rod is in threaded connection with the threaded hole, so that the second baffle has a conducting state in which the second through hole is communicated with the first through hole in a rotating mode and a covering state in which the second through hole is closed with the first through hole.
9. The needle for separating serum from animal blood collection according to claim 8, wherein the piston hole is provided with a first position-limiting portion, and the piston rod is provided with a first engaging portion, so that the second shutter is in the covering state when the first engaging portion is rotated to abut against the first position-limiting portion; and/or the presence of a gas in the gas,
the piston hole is provided with a second limiting part, the piston rod is provided with a second matching part, and when the second matching part rotates to abut against the second limiting part, the second baffle is in the conduction state.
10. The animal blood collection and serum separation needle of claim 1, wherein the collection container is removably attached to the outer end of the plunger body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764975.7A CN111870259B (en) | 2020-07-31 | 2020-07-31 | Blood collection serum separation needle for animals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764975.7A CN111870259B (en) | 2020-07-31 | 2020-07-31 | Blood collection serum separation needle for animals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111870259A true CN111870259A (en) | 2020-11-03 |
| CN111870259B CN111870259B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010764975.7A Active CN111870259B (en) | 2020-07-31 | 2020-07-31 | Blood collection serum separation needle for animals |
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