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A laboratory specimen is sometimes a biological specimen of a medical patient's tissue, fluids, or other samples used for laboratory analysis to assist in differential diagnosis or staging of a disease process. These specimens are often the most reliable method of diagnosis, depending on the ailment.
The material may be solid, liquid, gas, a material of some intermediate characteristics such as gel or sputum, tissue, organism, or a combination of these.Even if a material sample is not countable as individual items, the quantity of the sample may still be describable in terms of its volume, mass, size, or other such dimensions.
Sample (material), a limited quantity of something which is intended to be similar to and represent a larger amount; Biological specimen or biospecimen, an organic specimen held by a biorepository for research Laboratory specimen, a biological specimen taken by sampling; Zoological specimen, an animal or part of an animal preserved for ...
Biological specimens in an elementary school science lab. A biological specimen (also called a biospecimen) is a biological laboratory specimen held by a biorepository for research. Such a specimen would be taken by sampling so as to be representative of any other specimen taken from the source of the specimen. When biological specimens are ...
A sample of saliva can also be collected from the mouth. Excision (cutting out), a surgical method for the removal of solid or soft tissue samples. Puncture (also called centesis) followed by aspiration is the main method used for sampling of many types of tissues and body fluids.
An assay (analysis) is never an isolated process, as it must be accompanied with pre- and post-analytic procedures. Both the communication order (the request to perform an assay plus related information) and the handling of the specimen itself (the collecting, documenting, transporting, and processing done before beginning the assay) are pre-analytic steps.
There are two major types of specimens submitted for surgical pathology analysis: biopsies and surgical resections. [1]A biopsy is a small piece of tissue removed primarily for the purposes of surgical pathology analysis, most often in order to render a definitive diagnosis.
The right two are flat specimens designed to be used with serrated grips. An aluminium alloy tensile specimen, after testing. It has broken, and the surface where it broke can be inspected. The preparation of test specimens depends on the purposes of testing and on the governing test method or specification. A tensile specimen usually has a ...