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Analyses for a specific enzyme activity, or of the level of a specific enzyme that is used to assess health and disease risk, for early detection of …

Techniques used to carry out clinical investigative procedures in the diagnosis and therapy of disease.

Retraction of a clot resulting from contraction of PLATELET pseudopods attached to FIBRIN strands. The retraction is dependent on the contractile pro…

Enumeration by direct count of viable, isolated bacterial, archaeal, or fungal CELLS or SPORES capable of growth on solid CULTURE MEDIA. The method i…

A cytologic technique for measuring the functional capacity of stem cells by assaying their activity.

Any technique by which an unknown color is evaluated in terms of standard colors. The technique may be visual, photoelectric, or indirect by means of…

A genotoxicological technique for measuring DNA damage in an individual cell using single-cell gel electrophoresis. Cell DNA fragments assume a comet…

Serologic tests based on inactivation of complement by the antigen-antibody complex (stage 1). Binding of free complement can be visualized by additi…

A screening assay for circulating COMPLEMENT PROTEINS. Diluted SERUM samples are added to antibody-coated ERYTHROCYTES and the percentage of cell lys…

Complete blood count is a common laboratory investigation used to assess blood cell counts and support evaluation of infection, anemia, inflammation,…

A series of blood tests on one panel that measure the body's chemical balance and metabolism.

Determination of the quantity of a material present in a mixture by measurement of its effect on the electrical conductivity of the mixture. (Webster…

The excision of a cone of tissue, especially of the CERVIX UTERI.

A process where chemical reactions are carried out in a continuously flowing stream rather than in batch production.

GLUCOSE MONITORING that measures interstitial glucose concentration continuously throughout the entire day and night. It does not replace traditional…

A test to detect non-agglutinating ANTIBODIES against ERYTHROCYTES by use of anti-antibodies (the Coombs' reagent.) The direct test is applied to fre…

The collecting of fetal blood samples typically via ENDOSCOPIC ULTRASOUND GUIDED FINE NEEDLE ASPIRATION from the umbilical vein.

A tissue preparation technique that involves the injecting of plastic (acrylates) into blood vessels or other hollow viscera and treating the tissue …

Diagnosis of COVID-19 by assaying bodily fluids or tissues for the presence of the VIRAL RNA of SARS-COV-2.

Diagnosis of COVID-19 by assaying bodily fluids or tissues for the presence antibodies specific to SARS-COV-2 or its antigens.

Electron microscopy involving rapid freezing of the samples. The imaging of frozen-hydrated molecules and organelles permits the best possible resolu…

Preservation of cells, tissues, organs, or embryos by freezing. In histological preparations, cryopreservation or cryofixation is used to maintain th…

The technique of using a cryostat or freezing microtome, in which the temperature is regulated to -20 degrees Celsius, to cut ultrathin frozen sectio…

Primarily a pathological, laboratory or structured observational finding rather than a disease entity.

Synthetic organic reactions that use reactions between unsaturated molecules to form cyclical products.

Examination of CHROMOSOMES to diagnose, classify, screen for, or manage genetic diseases and abnormalities. Following preparation of the sample, KARY…

The demonstration of the cytotoxic effect on a target cell of a lymphocyte, a mediator released by a sensitized lymphocyte, an antibody, or complemen…

A measure of scientific precision, exactness, or correctness of quantitative or qualitative values, relative to the actual or true measurements.

Electrophoresis in which various denaturant gradients are used to induce nucleic acids to melt at various stages resulting in separation of molecules…

Removal of moisture from a substance (chemical, food, tissue, etc.).