LOINC Code 77727-6: Unsp allergen triggered histamine release Qn (Bld)

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component XXX allergen basophil bound Ab. It is commonly used with the system or sample type Bld.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Both
• Method: LHR

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• XXX allergen triggered histamine release [Units/volume] in Blood
• XXX allergen basophil bound Ab
• Quantitative determination of histamine release in heparinized whole blood incubated with a suspected allergen. This term is based on, but not limited in use to, IBL International's Histamine-Release assay, which incubates whole blood samples with different concentrations of the suspected allergen. Release of histamine occurs upon stimulation of basophilic granulocytes with amounts depending on their sensibility to the allergen. In the Histamine-Release assay, the percent of histamine release falls within the 100% control (= Total Histamine) and the blank value (= Spontaneous Release). Any positive signal greater than 5% release is regarded as allergen specific positive.
• ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Alrgen; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Associated; Autoantibodies; Autoantibody; Baso; BasoBnd Ab; Basophil release; Basophils; Basos; Blood; bnd; Bph; Leukocyte histamine reaction; Leukocyte histamine release; Point in time; QNT; Quan; Quant; Quantitative; Random; WB; WBC release; Whole blood

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions