摘要:
A blood filter unit having a blood filter holder containing a blood filtering material of a glass fiber filter and a microporous membrane is described. The holder has a blood inlet and a filtrate outlet, and accommodates the blood filtering material so that the microporous membrane is located on the filtrate outlet side and has a space between the blood filtering material and the filtrate outlet. The holder provides means for preventing adhesion of the blood filtering material on the filtrate outlet side. The inventive blood filter unit allows separation of a desired volume of plasma or serum for analysis without interference by the hematocrit value of the blood.
摘要:
A method for separating serum from whole blood in a vessel at an insertion speed of 30 cm/sec or less and maintaining the suction pressure of the suction nozzle at 400 mm Hg or less. Improved analytical results are obtained because the serum can be produced without hemolysis.
摘要:
The blood filter unit of the invention is composed of a blood filtering material made of glass fiber filter and microporous membrane and a holder having a blood inlet and a filtrate outlet. The holder accommodates the blood filtering material so that the microporous membrane is located on the filtrate outlet side, provides a space between the blood filtering material and the filtrate outlet, and provides a means for preventing adhesion of the blood filtering material on the filtrate outlet side. By using the blood filter unit, a necessary volume of plasma or serum for analysis can be separated surely, irrespective of hematocrit value of the blood.
摘要:
This invention relates to a plasma-collecting device which comprises a blood filtering material comprising glass fiber filter and microporous membrane, a holder having a blood inlet and a plasma outlet accommodating the blood filtering material, a blood-collecting needle being connected to the blood inlet, and a plasma receiver being provided on the plasma outlet side. The plasma-collecting device can collect a necessary amount of plasma for analysis from blood vessel directly, easily and surely.
摘要:
A means for collecting and spotting a small amount of blood which comprises a cylinder, a piston, and a puncturing tip, wherein: the piston is inserted airtightly into one end of the cylinder; the puncturing tip is airtightly and exchangeably fitted onto another end of the cylinder; the puncturing tip comprises a blood conduit and a needle suspended by a spring within the blood conduit; the blood conduit has a volume which is equal to a volume of blood to be spotted to analytical means; and the needle is arranged to be pushed out from the puncturing tip by descent of the piston and then return back by ascent of the piston.
摘要:
The invention provides a blood filter cartridge which is made so that the filtrate discharged from the filtrate outlet is not drawn back to the inside of the filtering chamber. The blood filter cartridge includes a blood filtering material, a holder containing the blood filtering material and having a blood inlet and a filtrate outlet, and a filtrate receiver which receives the filtrate discharged from the filtrate outlet. The blood filter catridge is provided with a means for preventing the filtrate in the filtrate receiver from returning to inside of the holder upon finishing filtration. Such means include the following: removing opposite faces around the filtrate outlet, making length of lower end of the filtrate outlet 0.8 mm or more, smoothing surface around the filtrate outlet, and forming surface around the filtrate outlet by a material having a small surface energy.
摘要:
A biochemical analysis apparatus comprises a movement device which moves analysis media containing a reagent or an electrochemical sensor, which will interact with a specific biochemical substance contained in liquid samples and give rise to changes in the analysis media, along a movement path connecting an introducing section and an ejecting section. While the analysis media are present in the movement path, a measurement device measures changes which have occurred in analysis media. A reading device reads information about correction values, which are to be used in order to correct a calibration curve so that it becomes suitable for analysis media used in analyses, from a correction value recording medium. A correction device corrects the calibration curve on the basis of the correction values. An operation device uses the corrected calibration curve in order to determine the concentration or the activity of the specific biochemical substance in a liquid sample from the value measured by the measurement device.
摘要:
A method of using a chemical analysis slide comprising a slide frame and a sheet-like or film-like chemical analysis element for colorimetric determination of a specific component in an aqueous liquid sample, which comprisesapplying an aqueous liquid sample to the chemical analysis element, andcovering the upper face of the side of the slide frame to which the sample is applied with a sheet-like, plate-like or block or brick-like cover to thereby ensure a space between the chemical analysis element and the cover and to prevent evaporation of water or to control evaporation rate of water.
摘要:
A dry type multilayer analysis element comprises at least one porous medium layer comprising a membrane filter, to which an antigen (or antibody) is immobilized, and at least one reagent layer through which a substance(s) which did not participate in an antigen-antibody reaction can permeate.The multilayer analysis element is effective for assaying components present in body fluids, blood, urine, etc., in a simple manner.
摘要:
A device for determining ionic activity composed of, as essential components, plural pairs of ion-selective solid electrodes each pair having two electrodes (one electrode on each of two sides) and each pair having a different ion-selective layer; two liquid distribution porous members, each member disposed over all the electrodes of each said side of the plural pairs; and a porous capillary bridge disposed on or between the liquid distribution porous members. The bridge can be in liquid contact with all the electrodes through the liquid distribution porous members and achieve electrical conduction between two electrodes in each pair after spotting a test solution and a reference solution. The device preferably further comprises a support frame and a cover having two apertures for liquid spotting. The device can simultaneously determine ionic activities of a plurality of different ions in a test solution, such as whole blood, plasma, serum, urine, etc., by spotting a test solution and a reference solution each in one operation and measuring an electrical potential difference of each pair.