Hepatitis B virus surface Ag [Presence] in Serum, Plasma or Blood by Rapid immunoassay 75410-1
LOINC Code
| LOINC code | 75410-1 | ||
|---|---|---|---|
| name | Hepatitis B virus surface Ag [Presence] in Serum, Plasma or Blood by Rapid immunoassay | ||
| description | Hepatitis B surface antigen (HBsAg) rapid tests are available in test strip and cassette formats from manufacturers in various countries including the US, Singapore, and China. (As of 8/25/2014, no HBsAg rapid test kits are approved for use in the United States). Hepatitis B surface antigen (HBsAg) rapid tests are intended to be used for screening patients for hepatitis B infection and for screening blood donors and blood products. HBsAg is the first serologic marker to appear in the blood of patients infected with hepatitis B, prior to the onset of symptoms. HBsAg can be detected 2-4 weeks in advance of alanine aminotransferase (ALT) liver enzyme levels becoming increased, and 3-5 weeks prior to symptoms. This makes HBsAg rapid tests particularly useful for screening. Follow-up and supplementary testing of any positive samples with other analytical methods (e.g. ELISA, WB)are required however, and negative results do not exclude Hepatitis B virus (HBV) exposure or infection. This term was created for, but not limited in use to, the OneStep HBsAG RapiCard InstaTest kit which uses a chromatographic lateral flow device technique on whole blood, serum, or plasma. Test cassette must be at room temperature prior to testing and then results can be read within 15 minutes. | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Hepatitis B virus surface Ag B = Buccal | ||
| property | PrThr = Present or threshold: The Property PrThr stands for “Presence or Threshold”, meaning either a) the actual presence or absence of an analyte, or b) that the amount of analyte detected is over some predetermined threshold. | ||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||
| system | Ser/Plas/Bld Ser = Serum Plas = Plasma Bld = Whole blood | ||
| scale | Ord = Ordinal: Ordered categorical responses, e.g., 1+, 2+, 3+; positive, negative; reactive, indeterminate, nonreactive. | ||
| method | IA.rapid | ||
Additional Names | |||
| short name | HBV surface Ag SerPlBld Ql IA.rapid | ||
Basic Attributes | |||
| class | MICRO | ||
| type | 1 Laboratory | ||
| order vs. observation | Both | ||
Associated Observations | |||
LOINC codes that represent optional associated observation(s) for a clinical observation or laboratory test. A LOINC term may represent a single associated observation or panel containing several associated observations. | |||
Member of these Groups | |||
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History/Usage | |||
| first released | |||
| last updated | 2.56 | ||
| last change type | MIN - change to field other than name | ||
| change reason | The PrThr property is used for LOINC terms whose results are reported using an ordered categorical scale, regardless of whether or not an internal threshold was used to make that determination. This change was approved by the Laboratory LOINC Committee in June 2016.; The EIA method, which was always intended to cover more than just enzyme-linked immunoassay and whose display name for the long common name has always been Immunoassay, was renamed IA in order to eliminate ambiguity about whether the method has a broader meaning than just enzyme-linked immunoassay. Likewise, EIA.rapid was renamed IA.rapid. These changes were approved by the Laboratory LOINC Committee in June 2016. | ||
Related Names | |||
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