Access Medical Systems, Ltd.

Erhua Cao

Robert F Zuk

Hong Tan

Yushan Tan

Jun Chen

Ming Xia

Genqian Li

Min Xia

This invention relates to an apparatus for conducting immunoassay test. The apparatus includes a groove unit having a groove along a vertical direction configured to hold a rod-shaped portion of a probe along the vertical direction, and a push pin configured to move along a horizontal direction, the push pin being capable of residing at a first position and a second position. A tip of the push pin is capable of pressing the rod-shaped portion of the probe against the groove when the push pin resides at the first position. The distance between the tip of the push pin and the groove is larger than a diameter of the rod-shaped portion of the probe when the push pin resides at the second position.

Cartridges for immunoassay tests and methods of using the same

Probes for biochemical tests

This invention relates to a detection system for measuring a fluorescent signal in a fluorescent assay. The system comprises a probe having a small sensing surface bound with a fluorescent label, and a light source and a detector both mounted at the proximal side of the sensing surface of the substrate. The invention also relates to a method for detecting an analyte in a liquid sample using a probe tip having a small surface area (&#x2264;5 mm) and a high molecular weight polymer (&#x2265;1 MD) having multiple binding molecules and multiple fluorescent labels. The binding reaction is accelerated by flowing the reaction solutions laterally and moving the probe tip up and down in the reaction vessels. The invention furthers relates to a fluorescent labeling composition comprising a cross-linked FICOLL&#xae; molecule having a plurality of binding molecules and a plurality of fluorescent labels.

Detection system for high sensitivity fluorescent assays

Systems for immunoassay tests

The present invention is directed to an assembly for use in detecting an analyte in a sample based on thin-film spectral interference. The assembly comprises a waveguide, a monolithic substrate optically coupled to the waveguide, and a thin-film layer directly bonded to the sensing side of the monolithic substrate. The refractive index of the monolithic substrate is higher than the refractive index of the transparent material of the thin-film layer. A spectral interference between the light reflected into the waveguide from a first reflecting surface and a second reflecting surface varies as analyte molecules in a sample bind to the analyte binding molecules coated on the thin-film layer.

Optical sensor of bio-molecules using thin-film interferometer

This invention relates to a cartridge for an immunoassay test. The cartridge comprises (a) a probe well comprising a probe and a cap, the cap being in a closed position to enclose the probe in the probe well, wherein the probe has a bottom tip coated with analyte-binding molecules; (b) a sample well to receive a sample; (c) one or more reagent wells; (d) a plurality of wash wells each containing a first aqueous solution; and (e) a measurement well having a light transmissive bottom, the measurement well containing a second aqueous solution; wherein the openings of the sample well, reagent well, measurement well and wash wells are sealed. The present invention also relates to an apparatus for loading and releasing a probe. The apparatus comprises a push pin and a groove to load and transfer the probe to a plurality of locations, such as different wells in the above-mentioned cartridge, to conduct the immunoassay test.

This invention relates to a detection system for measuring a fluorescent signal in a fluorescent assay. The system comprises a probe having a small sensing surface bound with a fluorescent label, and a light source and a detector both mounted at the proximal side of the sensing surface of the substrate. The invention also relates to a method for detecting an analyte in a liquid sample using a probe tip having a small surface area (&#x2266;5 mm) and a high molecular weight polymer (&#x2267;1 MD) having multiple binding molecules and multiple fluorescent labels. The binding reaction is accelerated by flowing the reaction solutions laterally and moving the probe tip up and down in the reaction vessels. The invention furthers relates to a fluorescent labeling composition comprising a cross-linked FICOLL&#xae; molecule having a plurality of binding molecules and a plurality of fluorescent labels.

This invention relates to a detection system for measuring a fluorescent signal in a fluorescent assay. The system comprises a probe having a small sensing surface bound with a fluorescent label, and a light source and a detector both mounted at the proximal side of the sensing surface of the substrate. The invention also relates to a method for detecting an analyte in a liquid sample using a probe tip having a small surface area (&#x2266;5 mm) and a high molecular weight polymer (&#x2267;1 MD) having multiple binding molecules and multiple fluorescent labels. The binding reaction is accelerated by flowing the reaction solutions laterally and moving the probe tip up and down in the reaction vessels. The invention furthers relates to a fluorescent labeling composition comprising a cross-linked Ficoll molecule having a plurality of binding molecules and a plurality of fluorescent labels.

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Shanghai, China

Erhua Cao