LOINCActive

LOINC Code 20129-3: Volume Breathing bag by Gas dilution.rebreath

20129-3 is a LOINC code used to identify Volume Breathing bag by Gas dilution.rebreath in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Volume. It is commonly used with the system or sample type Breathing bag.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Volume. It is commonly used with the system or sample type Breathing bag.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Method: Gas dilution.rebreathing

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Volume Breathing bag by Gas dilution.rebreath
  • Volume
  • Dil; Dilut; Gas Dil.rebreath; Gases; Lung; Point in time; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; Vol; Volume

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Volume Breathing bag by Gas dilution.rebreathVolume Breathing Bag Gas Dil.rebreathVolumePULMVolPtBreathing bag

Frequently asked questions

Code details

Code20129-3
SystemLOINC
Display nameVolume Breathing bag by Gas dilution.rebreath
DescriptionVolume
Short nameVolume Breathing Bag Gas Dil.rebreath
ComponentVolume
PropertyVol
TimingPt
System (specimen)Breathing bag
ScaleQn
MethodGas dilution.rebreathing
ClassPULM
Example unitsL
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.48

Part names

VolumeVolPtBreathing bagQnGas dilution.rebreathingPoint in time (spot)Gas dilution.rebreath

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.