74789-9
LOINC Code
| LOINC code | 74789-9 | ||||||||||||||||||||||||
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| name | |||||||||||||||||||||||||
| description | The hydrogen breath test is based on the fact that the only hydrogen gas source in humans is intestinal bacteria, which produces hydrogen gas during carbohydrate metabolism. After the patient ingests a dose of fructose, any carbohydrate that is not absorbed is metabolized by intestinal bacteria During this process, hydrogen gas is produced, which is absorbed and eventually exhaled through the lungs; the amount of hydrogen in the expired gas is measured at various intervals depending on the protocol being used. The test is used to detect fructose malabsorption, irritable bowel syndrome and small intestine bacterial overgrowth.[PMID: 16474100] | ||||||||||||||||||||||||
| status | ACTIVE | ||||||||||||||||||||||||
Fully-Specified Name | |||||||||||||||||||||||||
| component | Fructose challenge panel | ||||||||||||||||||||||||
| property | - | ||||||||||||||||||||||||
| 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 | Exhl gas = Exhaled gas (breath) | ||||||||||||||||||||||||
| 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 | Breath; CHEMISTRY.CHALLENGE TESTING; ExG; Exhaled gas; Exhaled gas (=breath); Fructose HBT; Fructose HBT Pnl; Gases; Levulose; Pan; PANEL.CHALLENGE; Panl; Pnl; Point in time; QNT; Quan; Quant; Quantitative; Random; Revulose | ||||||||||||||||||||||||
Basic Attributes | |||||||||||||||||||||||||
| class | PANEL.CHAL | ||||||||||||||||||||||||
| type | 1 Laboratory | ||||||||||||||||||||||||
| order vs. observation | Fructose HBT Pn | ||||||||||||||||||||||||
Panel Components | |||||||||||||||||||||||||
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History/Usage | |||||||||||||||||||||||||
| first released | |||||||||||||||||||||||||
| last updated | 2.64 | ||||||||||||||||||||||||
| last change type | MIN - change to field other than name | ||||||||||||||||||||||||
Related Names | |||||||||||||||||||||||||
Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, 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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