Disclosed is method of improving flow of a liquid sample in an assay device, as well as a method of performing an assay on a liquid sample for the detection of one or more analytes of interest. The methods use the addition of a reagent, such as a wash reagent, to wet the fluid flow path of a sample prior to sample addition, thereby improving flow of the sample through the fluid flow path that has been wetted as opposed to flow of the sample through the fluid flow path that has not been wetted. The reagent wets the fluid flow path between the sample addition zone and the wicking zone.

Embodiments of the present invention relate to point-of-care systems for analyte detection, and more particularly, to systems and methods for detecting analytes in a fluid by passing the analytes through one or more processing chambers in a pressure driven process, and subjecting the processed analytes for detection in a lateral flow process.

Disclosed herein are chips, devices, methods of making the same, and methods of detecting a target analyte, and methods of diagnosing an individual with a disease or condition when a target analyte associated with the disease or condition is detected.

In various embodiments methods detecting and/or quantifying a target analyte using immuno-PCR and optionally nucleic acid amplification are provided. In certain embodiments the methods utilize a cartridge for performing immuno-PCR to detect and/or quantify one or more target analytes, and optionally detecting and/or quantifying a nucleic acid, where the cartridge comprises a sample receiving chamber; a chamber comprising a matrix material that acts as a filter and/or a DNA binding agent; a temperature controlled channel or chamber; and a plurality of chambers containing reagents and/or buffers for performing immuno-PCR, where the plurality of chambers comprises a chamber containing a capture antibody that binds the analyte that is to be detected; the plurality of chambers comprises a chamber containing a detection antibody where said detection antibody is optionally attached directly or indirectly to a signal DNA; the plurality of chambers comprises a chamber containing a PCR master mix; the plurality of chambers comprises a chamber containing primers for amplifying all or a region of said signal DNA; and the plurality of chambers comprises a chamber containing a probe for detecting all or a region of said signal DNA.

Devices, kits, and methods for determining the presence or absence of at least one analyte in a liquid test sample.

An impedance spectroscopy biosensor is provided that is fabricated on a stretchable substrate. The stretchable substrate is integrated with an impedance biosensor that undergoes cyclic strain without cracking. The biosensor is formed by curing an elastomer precursor while on a pre-tensioned membrane that includes a conductive electrode. The resulting elastomeric material is released from the support after curing which releases the pre-tensioned state to produce the biosensor.

A biosensing device for continuous monitoring of an analyte in a fluid matrix includes an electromagnetic excitation element [402], a biosensing surface [406], an opposing surface [410], a separation component [420,422], light collection optics [412], a light sensor [414], an image recording and analysis system [416], and an excitation control system [400]. The separation component is connected to the biosensing surface and to the opposing surface, forming a concave gap region [408] between the biosensing surface and the opposing surface. The biosensing surface comprises biosensing particles sensitive to electromagnetic signals from the electro-magnetic excitation element, where an optical response of the biosensing particles to the electromagnetic signals is adapted to change in the presence of an analyte in the gap region. The light collection optics couple light emitted from the biosensing particles on the biosensing surface to the light sensor. The image recording and analysis system is connected to the light sensor and processes light signals from the biosensing particles to determine presence or absence or concentration of the analyte in the fluid matrix.

The disclosure relates to microfluidic devices and methods of use thereof for monitoring the directionality, velocity, and migration persistence of neutrophils or other cells in the absence of chemical gradients for the purposes of detecting and quantifying abnormal neutrophil motility phenotypes, using low sample volumes and with minimal activation of the neutrophils. The devices and methods can be used to diagnose sepsis in subjects suspected of having sepsis or at risk of developing sepsis. The devices and methods can also be used to monitor the responses of patients to sepsis therapies.

The present disclosure provides compositions, methods, systems, and devices for polynucleotide processing and analyte characterization from a single cell. Such polynucleotide processing may be useful for a variety of applications. The compositions, methods, systems, and devices disclosed herein generally describe barcoded oligonucleotides, which can be bound to a bead, such as a gel bead, useful for characterizing one or more analytes including, for example, protein (e.g., cell surface or intracellular proteins) and chromatin (e.g., accessible chromatin).

The present invention provides a method for attaching cells to a biosensor surface (5) of a biosensor (4) comprising: providing a cell suspension in a liquid receiving unit (1), wherein the cell suspension forms a surface (7) to the exterior of the liquid receiving unit (1); contacting the biosensor surface (5) with the surface (7) of the cell suspension in the liquid receiving unit (1); and allowing the cells to settle on the biosensor surface (5) by gravity, and allowing the cells to adhere to the biosensor surface (5).