Method and device for detecting analytes in fluids

G - Physics – 01 – N

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Details

G01N 33/558 (2006.01) C12M 1/34 (2006.01) C12Q 1/25 (2006.01) G01N 21/78 (2006.01) G01N 33/483 (2006.01) G01N 33/536 (2006.01) G01N 33/543 (2006.01) G01N 33/577 (2006.01)

Patent

CA 2332240

A disposable, dry chemistry analytical system is disclosed which is broadly useful for the detection of a variety of analytes present in biological fluids such as whole blood, serum, plasma, urine and cerebral spinal fluid. The invention discloses the use of the reaction interface that forms between two liquids converging from opposite directions within a bibulous material. The discovery comprises a significant improvement over prior art disposable, analytical reagent systems in that the detectable reactant zone is visually distinct and separate from the unreacted reagents allowing for the use of reaction indicators exhibiting only minor changes as well as extremely high concentrations of reactants. In addition, staged, multiple reagents can be incorporated. Whole blood can be used as a sample without the need for separate cell separating materials. Finally, the invention is useful for the detection of analytes in a broad variety of materials such as milk, environmental samples, and other samples containing target analytes.

L'invention concerne un système jetable d'analyse en chimie par voie sèche, utile globalement pour détecter divers analytes présents dans des fluides biologiques tels que le sang entier, le sérum, le plasma, l'urine et le fluide céphalo-rachidien. L'invention concerne l'utilisation de l'interface de réaction qui se forme entre deux liquides convergeant à partir de directions opposées dans une matière hydrophile. Cette invention comporte un perfectionnement important par rapport à des systèmes jetables à réactif analytique existants, en ce que la zone de réactif détectable est visuellement distincte et séparée des réactifs inertes, ce qui permet d'utiliser des indicateurs de réaction n'indiquant que des modifications mineures ainsi que des concentrations extrêmement élevées de réactifs. De plus, des réactifs multiples superposés peuvent être incorporés. Le sang entier peut être utilisé comme échantillon sans nécessiter de matières distinctes de séparation de cellules. Enfin, l'invention sert à détecter des analytes dans une large gamme de matières telles que le lait, des échantillons prélevés dans l'environnement et d'autres échantillons contenant des analytes voulus.

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