Skip to main content
radioimmunoassay

radioimmunoassay

1 8.9
A lab method that measures tiny amounts of substances in blood using antibodies and a radioactive label
  • noun
  • /ˌreɪdioʊˌɪmjunəˈæsɛɪ/
  • Specialized
translation icon : radioinmunoanálisis
  • A radioimmunoassay can accurately quantify the concentration of specific substances in blood samples.
  • radioimmunoassay to measure
  • determined by radioimmunoassay

Examples

  • Serum samples were stored at -70 degrees C until analysis in batches by a competitive radioimmunoassay technique.

    Academic text (1999)
  • Vasopressin was determined by radioimmunoassay.

    Academic text (1991)
  • You've got to do a radioimmunoassay on that blood sample.

  • Insulin and C-peptide concentrations were measured by radioimmunoassay with serum.

    Academic text (2000)
  • Total osteocalcin was measured using radioimmunoassay (IRMA) reagents from Immunotopics according to the manufacturer's instructions.

    Blog text (6)
  • In the dentist's office, serum antibodies against anti-HBsAg were measured with a radioimmunoassay (Abbott Laboratories, Chicago, USA).

    Academic text (1991)
  • Serum insulin was measured using insulin radioimmunoassay (RIA), a double-antibody batch method (Pharmacia Diagnostics AB, Uppsala, Sweden).

    Academic text (2016)
  • Plasma concentration of endothelin was determined by radioimmunoassay employing anti-endothelin-1 antiserum, 125I-endothelin-1, and endothelin-1 standards (Peninsula Labs, Belmont, California, USA).

    Academic text (1991)
  • The researchers used a radioimmunoassay to measure hormone levels in the patient's blood.

  • Doctors often rely on radioimmunoassay techniques to determine thyroid hormone levels in patients.

Synonyms

immunoassay
vsradioimmunoassay
  • Specialized
1 7.2

A lab test that uses antibodies to find or measure proteins in samples like blood

uses radioactive labels with antibodies to measure concentrations in blood
immunochemical assay
vsradioimmunoassay
  • Specialized
6.6

A lab test that uses antibodies to find or measure proteins in body samples

focuses on blood concentration measurement using radioactive labels and antibodies

How Sensitive

mass spectrometer
  • Specialized
3 5.5
radioimmunoassay
  • Specialized
1 8.9
immunoassay
  • Specialized
1 7.2
assay
  • Specialized
5 8.9
screening
23 3.9

Surface Forms

Morphology

radioimmunoassay = immunoassay (semi-transparent) = radio + immuno + assay

Built by prefixing 'radio-' to the technical term 'immunoassay'; the parts are morphologically clear but the combining form 'immuno-' and the technical sense make it only partially transparent to general learners.

Etymology

Radioimmunoassay combines radio- ('radioactive'), immuno- ('immune', about antibodies) and assay ('test'). So it literally means a 'test' that uses radioactivity and the body's immune tools to measure very small amounts in the blood.