50584-2

Lactose challenge (hydrogen breath test) panel - Exhaled gas

Active

Term Description

Used to order Hydrogen and/or methane breath test
Source: Regenstrief LOINC

Part Descriptions

LP65534-7   Lactose challenge panel
Lactose challenge test is used to detect lactose intolerance. In one version of the test, breath samples were collected just before the challenge and then every 30 minutes for 3 hours. The samples were analyzed for their hydrogen content, and were considered positive for lactose intolerance if the hydrogen level rose from baseline by more than 20 parts per million in any sample. For this study, a positive breath test result was the definitive diagnosis of lactose intolerance. Zoler M. Adult Lactose Intolerance Is Still Hard to Diagnose - Brief Article - Statistical Data Included. Family Pratice News June 1, 2000. Source: Regenstrief Institute

LP65534-7   Lactose challenge panel
Hydrogen breath test using lactose is performed to diagnose a lactose malabsorption. A pre dose reading of hydrogen levels is collected. The patient is then given a small amount of pure lactose (typically 20 to 25 g), and then required to take readings every 15, 30 or 60 minutes for two to three hours. If the level of hydrogen rises above 20 ppm (parts per million) over the lowest preceding value within the test period, the patient is typically diagnosed as a lactose malabsorber. If the patient produces methane then the parts per million for the methane typically rises 12 ppm over the lowest preceding value to be considered positive. If the patient produces both hydrogen and methane then the values are typically added together and the mean of the numbers is used to determine positive results, usually 15 ppm over the lowest preceding value. However, recent study suggest that testing may not correlate with any actual diagnosis. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See http://creativecommons.org/licenses/by-sa/3.0/ for details. Source: Wikipedia, Hydrogen breath test

Panel Hierarchy

Details for each LOINC in Panel LHC-Forms

Fully-Specified Name

Component

Lactose challenge panel

Property

-

Time

Pt

System

Exhl gas

Scale

Qn

Method

Additional Names

Short Name

Lactose challenge Pnl ExG

Display Name

Lactose challenge (hydrogen breath test) panel (Exhl gas)

Consumer Name Alpha Get Info

Lactose challenge (hydrogen breath test) panel, Exhaled gas

Basic Attributes

Class

PANEL.CHAL

Type

Laboratory

First Released

Version 2.22

Last Updated

Version 2.73

Order vs. Observation

Order

Common Test Rank Get Info

17218

Panel Type

Panel

Language Variants Get Info

Related Names

• Breath
• CHEMISTRY.CHALLENGE TESTING
• ExG
• Exhaled gas
• Exhaled gas (=breath)
• Gases
• Lactose BT
• Lactose challenge Pnl
• LTT
• Pan
• PANEL.CHALLENGE
• Panl
• Pnl
• Point in time
• QNT
• Quan
• Quant
• Quantitative
• Random

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