Mitogen stimulated gamma interferon positive control spot count [#] in Blood 74280-9
LOINC Code
| LOINC code | 74280-9 | ||
|---|---|---|---|
| name | Mitogen stimulated gamma interferon positive control spot count [#] in Blood | ||
| description | The count of mitogen-stimulated (e.g. phytohemagglutinin, PHA) spots (0 to >50) in a patient's T cells which serves as serves as an IFN-gamma positive control and indicates cell functionality. This term is created for, but not limited in use to, Oxford Immunotec's T-SPOT.TB assay, used to diagnose M. tuberculosis. T-SPOT.TB assay uses enzyme-linked immunospot (ELISPOT) methodology to enumerate M. tuberculosis-sensitized T cells by capturing interferon-gamma (IFN-y) in the vicinity of T cells in the patient's whole blood. In the T-SPOT test, the positive control spot count should be greater than or equal to 20 or show saturation (too many spots to count). When the spot count is <20, the result should be considered invalid unless Panel A (ESAT-6) or Panel B (CFP10) are positive or borderline. | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Mitogen stimulated gamma interferon.positive control spot count | ||
| property | Num = Number | ||
| 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 | Bld = Whole blood | ||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||
| method | |||
Additional Names | |||
| short name | Mitogen IGNF.spot count Bld | ||
Basic Attributes | |||
| class | MICRO | ||
| type | 1 Laboratory | ||
| order vs. observation | Both | ||
| example UCUM units | {#} The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org) | ||
| example unit | # | ||
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 Panels | |||
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History/Usage | |||
| test rank | 10814 of 2000 most commonly performed tests by labs in USA | ||
| first released | |||
| last updated | 2.73 | ||
| last change type | MIN - change to field other than name | ||
Related Names | |||
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Copyright © 2024 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2024, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.
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