ra·di·o·im·mu·no·as·say

(rā′dē-ō-ĭm′yə-nō-ăs′ā, -ĭm-yo͞o′-)

n. Abbr. RIA

A technique used to quantitate minute amounts of a substance, such as a hormone, in blood or another liquid. It involves the use of radioisotopes and of antibodies to the substance being investigated.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

radioimmunoassay

(ˈreɪdɪəʊˌɪmjʊnəʊˈæseɪ)

(Medicine) a sensitive immunological assay, making use of antibodies and radioactive labelling, for the detection and quantification of biologically important substances, such as hormone concentrations in the blood

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ra•di•o•im•mu•no•as•say

(ˌreɪ di oʊˌɪm yə noʊˈæs eɪ, -æˈseɪ, -ɪˌmyu-)

n.

a test procedure that integrates immunologic and radiolabeling techniques to measure minute quantities of a substance, as a drug, in a given sample of body fluid or tissue.

[1960–65]

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

radioimmunoassay - immunoassay of a substance that has been radioactively labeled

immunoassay, immunochemical assay - identification of a substance (especially a protein) by its action as an antigen; "PSA in the blood can be measured with an immunochemical assay"

Translations

ra·di·o·im·mu·no·as·say

n. radioinmunoensayo, prueba para determinar la concentración de suero de proteína como una reacción a la injección de una sustancia radioactiva.

English-Spanish Medical Dictionary © Farlex 2012

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References in periodicals archive

Samples were also analyzed for thyroid function tests in radioimmunoassay laboratory (RIA-lab) at the institute of Radiotherapy and Nuclear Medicine (IRNUM), Peshawar, Pakistan.

RELATIONSHIP OF GLYCEMIC CONTROL WITH THYROID HORMONE LEVELS IN PATIENTS WITH TYPE 2 DIABETES MELLITUS

* Radioimmunoassay Kit, 100 Tubes THYROID PEROXIDASE AUTOANTIBODY (TPOAb)

Product information

[3.] Shine B, de Beer FC and Pepys MB: Solid phase radioimmunoassay for human C-reactive protein.

Monitoring of high sensitivity C-reactive protein in type 2 diabetes mellitus patients may reduce the mortality

- The global radioimmunoassay market was dominated by Europe in 2014, a condition that is projected to continue through 2020, according to new research from Dublin-based Research and Markets.

European Radioimmunoassay Market to Grow at a CAGR of 3.9% from 2015 to 2020, According to Research

Total T3 and T4 levels were assessed using radioimmunoassay. All these parameters were compared with age- and sex-matched healthy controls.

Association between serum ferritin and thyroid hormone profile in hypothyroidism

The investigators reported multiple limitations to the study, including the small number of patients and the use of a bridging ELISA test which is reliable but considered to be less accurate than radioimmunoassay.

Response to TNF-alpha blockers varies in PsA

Radioimmunoassay: a method for human chorionic gonadotropin and human luteinizing hormone.

The long gestation of the modern home pregnancy test

A membrane similar to that used for kidney dialysis and a very sensitive radioimmunoassay procedure were used to measure the release of hypocretin and MCH.

Findings Suggest Possible New Treatment for Depression, Other Disorders

Radioimmunoassay (RIA) is the traditional "gold standard" method for evaluation of serum cortisol concentration [8, 9].

Comparison of VIDAS and radioimmunoassay methods for measurement of cortisol concentration in bovine serum

Although the use of mast cell tryptase, skin testing, and in some circumstances radioimmunoassay are now standard in the investigation of such patients, there is no doubt that the best test to determine the safety of subsequent anaesthesia is an uneventful anaesthetic.

Follow-up of patients after testing for anaesthetic allergy

Rosalyn Sussman Yalow, who died last week, in the 1950s developed (with Solomon Berson) something called radioimmunoassay. Now used widely to screen donor blood for hepatitis and to detect underactive thyroids in babies under three months (in turn to prevent mental retardation), it was the first method sensitive enough to study hormones and other substances in the body, which it did by utilizing radioactive isotopes.

An Exceptional Lady, of Her Time

Radioimmunoassay of 8 isoprostaglandin F2 alpha: an index for oxidative injury via free radical catalyzed lipid peroxidation.

Increased oxidative stress in Nigerian women with pre-eclampsia