A substance that is being identified or measured in a laboratory test.
A mechanism to check the precision and accuracy of a test system, such as an automated analyzer, to determine if the system is providing accurate results. Calibration is typically performed using a calibration device, often called a standard.
A tentative diagnosis of a patient's condition obtained through evaluation of the health history and the physical examination, without the benefit of laboratory or diagnostic tests.
A solution that is used to monitor a test system to ensure the reliability and accuracy of test results.
Abstaining from food or fluids (except water)for a specified amount of time before the collection of a specimen.
The state in which body systems are functioning normally, and the internal environment of the body is in equilibrium; the body is in a healthy state.
Occurring in the living body or organism.
The clinical analysis and study of materials, fluids, or tissue obtained from patients to assist in diagnosis and treatment of disease.
A complex laboratory test that does not meet the CLIA criteria for waiver and is subject to the CLIA regulations.
The liquid part of the blood, consisting of a clear, yellowish fluid that comprises approximately 55% of the total blood volume.
A printed document supplied by the manufacturer with a laboratory test product that contains information on the proper storage and use of the product.
An array of laboratory tests for identifying a disease of state or evaluating a particular organ or organ systems.
A test that indicates whether or not a substance is present in the specimen being tested and also provides an approximate indication of the amount of the substance present.
The application of methods to ensure that results are reliable and valid and that errors are detected and eliminated.
A test that indicates the exact amount of a chemical substance that is present in the body, with the results being reported in measurable units.
A substance that produces a reaction with a patient specimen that allows detection or measurement of the substance by the test system.
A certain established and acceptable parameter or reference range within which the laboratory test results of a healthy individual are expected to fall.
A laboratory test performed routinely on apparently healthy patients to assist in the early detection of disease.
The clear, straw-colored part of the blood (plasma) that remains after the solid elements and the clotting factor fibrinogen have been seperated out of it.
A small sample of something taken to show the nature of the whole.
A setup that includes all of the test components required to perform a laboratory test such as testing devices, controls, and testing reagents.
A laboratory test that meets the CLIA criteria for being a simple procedure that is easy to perform and has a low risk of erroneous test results. Waived tests include tests that have been FDA-approved for use by patients at home.