Exempt from centrifugal whole blood processing module
Technical field
The invention belongs to whole blood process field, especially relate to one and exempt from centrifugal whole blood processing module.
Background technology
In recent years, along with antibiotic a large amount of abuse and immunodepressant widely use clinical, the incidence of disease and the case fatality rate of aggressive deep fungal infection are more and more higher.Wherein, aspergillus, cryptococcus and candida albicans have become several important pathomycete clinically gradually.The Exoantigen of Aspergillus, cryptococcus and candida albicans is respectively galactomannan antigen, capsular polysaccharide antigen and mannan antigen, can find in early days in infection from blood samples of patients.Therefore be purposes the most a kind of method during current fungal infection detects based on immune response detectable antigens, but the method has higher requirement to the removal of impurities of blood sample and purifying.
Need to carry out process in early stage to blood or body fluid based on immunoreactive vitro detection, remove unnecessary interfering material, just can make immune response more accurately and fast.Traditional whole blood process, need the blood sample that obtains after anticoagulant process, carry out centrifugal treating, other composition (blood platelet, plasma-albumin, globulin etc.) in haemocyte (red blood cell, leucocyte) and blood is precipitated, and obtains supernatant (blood plasma).When utilizing immune response to detect polysaccharide antigen, blood supernatant also needs further process, adds treating fluid, as EDTA etc., through heating the means such as centrifugal, removes the most of protein in blood plasma.Above blood processing means need to use the equipment such as hydro-extractor, are unfavorable for micro-fluidic chip integrated, considerably increase the time of detection and the consumption of sample.Needed for micro-fluidic chip, sample is less, can be carried out the process of blood, obtain the sample of required filtering protein by the method such as physical filtering and absorption.
The common method of physisorption protein has: molecular sieve, ion-exchange, drainage column and affinity chromatography etc.Can according to the difference of molecular weight of albumen size, the difference of the charging property of albumen, or with the specific binding of aglucon, reach separation and the absorption of protein.Because the design's fundamental purpose is filtering protein, therefore do not need specificity filtering, therefore adopt the method for hydrophobic material indifference opposite sex absorption.
Summary of the invention
In view of this, the present invention is intended to propose one and exempts from centrifugal whole blood processing module, and whole blood sample, without the need to carrying out centrifugal treating, decreases the time of detection, reduces the consumption of sample.
For achieving the above object, technical scheme of the present invention is achieved in that
One exempts from centrifugal whole blood processing module, comprise upper strata filter membrane successively from top to bottom, adsorbed layer and lower floor's filter membrane, described upper strata filter membrane is made up of glass fiber filter paper or microporous barrier, described upper strata filter membrane is formed by stacking by multilayer filter membrane, described upper strata filter sizes from top to bottom reduces gradually, the present invention adopts filter membrane sandwich to filter adsorption structure, the fundamental purpose of upper strata filter membrane is filtering haemocyte, described adsorbed layer is the hydrophobic material without swelling action, described lower floor filter membrane is made up of glass fiber filter paper or microporous barrier, the aperture of described lower floor filter membrane is less than the aperture of described upper strata filter membrane, preferably, described upper strata filter membrane and described lower floor filter membrane are circle, the outside of described adsorbed layer is provided with outer ring.
Further, described adsorbed layer is C18 dewatering filling, the aperture of described adsorbed layer is less than the aperture of described upper strata filter membrane, middle layer is hydrophobic adsorbent layer, filler is the dewatering filling of the unsoluble-unexpansive matter such as C18, carry out without adsorption selection protein, the material that loading can detect according to difference requires to prepare different size to protein abundance in serum after process.Because central filler material is in dry environment before use, be directly used in a large amount of wastes that filtration can cause sample, adsorption efficiency may be made to reduce simultaneously, therefore preferably soak with damping fluid or distilled water before the use.
Further, described outer ring is hollow cylinder, the external diameter of described outer ring is more than or equal to the diameter of described upper strata filter membrane and described lower floor filter membrane, the internal diameter of described outer ring is less than the diameter of described upper strata filter membrane and described lower floor filter membrane, the object of such setting is, the edge of described upper strata filter membrane and described lower floor filter membrane all can drop on described outer ring, and the effect of fixing described upper strata filter membrane, lower floor's filter membrane and described adsorbed layer can be played in described outer ring.
Further, the connection bonding with described outer ring of described upper strata filter membrane, the connection bonding with described outer ring of described lower floor filter membrane, the periphery of described upper strata filter membrane is bonding with the upper surface of described outer ring, the periphery connection bonding with the lower surface of described outer ring of described lower floor filter membrane, the center section of described upper strata filter membrane and described lower floor filter membrane can normally use.
Further, the number of plies of described upper strata filter membrane is 3-5 layer, and the aperture of described upper strata filter membrane is between 0.2 μm-10 μm, for ensureing filtering high-level efficiency and high flow rate, the filtering membrane gradient of decreasing pore size is adopted to stack, in order to avoid too much haemocyte filters simultaneously, blocking microporous, cause cutout phenomenon.
Further, be combined with each other in the mode that periphery is bonding between the filter membrane of described upper strata, time bonding, by described upper strata filter membrane periphery bonding, the center section of described upper strata filter membrane can normally use.
Further, the Main Function of described lower floor filter membrane is as carrying, the aperture of preferred described lower floor filter membrane is slightly less than middle layer filler diameter, preferred employing glass fiber material is to reduce the unnecessary waste of sample, the below of described lower floor filter membrane is provided with arc collection unit, described arc collection unit comprises the taper cambered surface that circumference is arranged and the collection mouth be positioned at below described cambered surface, described cambered surface raises up, described cambered surface efficiently can collect liquid, and instill desired zone, described collection mouth is positioned at the centre of described arc collection unit, the size of described collection mouth is mated with the exit size of commercially available syringe.
Further, the top of described upper strata filter membrane is provided with threaded portion, the maximum outside diameter of described threaded portion equals the external diameter of described outer ring, the centre of described threaded portion is hollow-core construction, described upper strata filter membrane is now positioned at the inside of described threaded portion, preferably, the diameter of described upper strata filter membrane equals the internal diameter of described threaded portion, now, gapless between described upper strata filter membrane and described threaded portion, under avoiding blood lateral flow, described threaded portion is set, on the one hand, the friction force with syringe inner chamber body can be increased, on the other hand, internal thread is provided with in syringe cavity commercially available at present, preferably, by the screw-internal thread fit of the external thread of described threaded portion and commercially available syringe, better strength of joint can be obtained, described threaded portion is fixedly connected with the top of described outer ring, connected mode is welding or bonding, also can be one-body molded.
During use, it should be noted that, the internal diameter specification of commercially available syringe cavity is different, pin for the purpose of the present invention, the external diameter of described outer ring is equal with the internal diameter of supporting syringe, the present invention is inserted in commercially available syringe, screw in one end of syringe outlet, pending blood is injected in syringe cavity, injection mode can be, but not limited to utilize dropper instill or use other syringes to inject, then, syringe piston is utilized to promote blood sample, blood sample is through described upper strata filter membrane, after adsorbed layer and lower floor's filter membrane, flow out from the outlet of syringe, enter micro-fluidic sample inlet district to detect.
Relative to prior art, the present invention has following advantage: manual pressure, providing power, neither needing the centrifugation apparatus of high cost and the treatment step of complexity, also can reduce the consumption of sample by syringe pressure for filtering.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the main apparent direction structural representation of the embodiment of the present invention 1;
Fig. 2 is the main apparent direction structural representation of the embodiment of the present invention 2;
Fig. 3 is the embodiment of the present invention 3 stereo directional decomposition texture schematic diagram;
Fig. 4-5 is the main apparent direction structural representation of the embodiment of the present invention 3.
Description of reference numerals:
1-upper strata filter membrane; 2-adsorbed layer; 3-lower floor filter membrane; 4-outer ring; 5-arc collection unit; 51-cambered surface; 52-collects mouth; 6-threaded portion.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " etc. only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, one or more these features can be expressed or impliedly be comprised to the feature being limited with " first ", " second " etc.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood by concrete condition.
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Embodiment 1
Exempt from centrifugal whole blood processing module, comprise upper strata filter membrane 1 successively from top to bottom, adsorbed layer 2 and lower floor's filter membrane 3, described upper strata filter membrane 1 is made up of glass fiber filter paper or microporous barrier, the number of plies of described upper strata filter membrane 1 is 3-5 layer, be combined with each other in the mode that periphery is bonding between described upper strata filter membrane 1, the aperture of described upper strata filter membrane 1 is between 0.2 μm-10 μm, filter membrane 1 aperture, described upper strata from top to bottom reduces gradually, described adsorbed layer 2 is C18 dewatering filling, the aperture of described adsorbed layer 2 is less than the aperture of described upper strata filter membrane 1, described lower floor filter membrane 3 is made up of glass fiber filter paper or microporous barrier, the aperture of described lower floor filter membrane 3 is less than the aperture of described upper strata filter membrane 1, described upper strata filter membrane 1 and described lower floor filter membrane 3 are circle, the outside of described adsorbed layer 2 is provided with outer ring 4, described outer ring 4 is hollow cylinder, the external diameter of described outer ring 4 is more than or equal to the diameter of described upper strata filter membrane 1 and described lower floor filter membrane 3, the internal diameter of described outer ring 4 is less than the diameter of described upper strata filter membrane 1 and described lower floor filter membrane 3, described upper strata filter membrane 1 and the bonding connection in described outer ring 4, described lower floor filter membrane 3 and the bonding connection in described outer ring 4.
Embodiment 2
Embodiment 2 is substantially identical with the structure of embodiment 1, embodiment 2 is with the difference of embodiment 1: the below of described lower floor filter membrane 3 is provided with arc collection unit 5, described arc collection unit 5 comprises the taper cambered surface 51 that circumference is arranged and the collection mouth 52 be positioned at below described cambered surface 51, and described cambered surface 51 raises up.
Embodiment 3
Embodiment 3 is substantially identical with the structure of embodiment 1, embodiment 2 is with the difference of embodiment 1: the top of described upper strata filter membrane 1 is provided with threaded portion 6, the maximum outside diameter of described threaded portion 6 equals the external diameter of described outer ring 4, and the centre of described threaded portion 6 is hollow-core construction.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.