Coproporphyrin 3/Porphyrins.total in Stool 75025-7
LOINC Code
| LOINC code | 75025-7 | ||
|---|---|---|---|
| name | Coproporphyrin 3/Porphyrins.total in Stool | ||
| description | Total fecal porphyrins are markedly increased especially in active HCP (Hereditary Coproporphyria) and VP (Variegate Porphyria) and to a lesser extent in PCT (Porphyria Cutanea Tarda) and EPP (Erythropoietic Protoporphyria). Fecal porphyrins can be separated and measured individually by HPLC. Porphyrins with 2-4 carboxyl groups generally predominate in feces. These are excreted by the liver into the bile and then flow into the intestine. As with urine, it is most useful to measure the total amount of porphyrins in a fecal sample. If this is increased, then the laboratory should determine which porphyrins predominate rather than focus on the amount of each porphyrin. Fecal porphyrin determinations may be confounded by variations in fecal flow; most people have one or a few bowel movements daily and a "24 hour stool collection" is really not uniform from day to day. Substances in the diet and any internal bleeding into the stomach or intestines may also interfere. | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Coproporphyrin 3/Porphyrins.total | ||
| property | SFr = Substance Fraction | ||
| 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 | Stool = Stool = Fecal | ||
| 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 | Copro3 SFr Stl | ||
Basic Attributes | |||
| class | CHEM | ||
| 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 | |||
| first released | |||
| last updated | 2.48 | ||
| 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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