LOINCActive

LOINC Code 20138-4: Volume compressed gas Ventilator airway circuit

20138-4 is a LOINC code used to identify Volume compressed gas Ventilator airway circuit 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.compressed gas. It is commonly used with the system or sample type Ventilator airway circuit.

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.compressed gas. It is commonly used with the system or sample type Ventilator airway circuit.

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

What it does not mean

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

Key facts

  • Volume compressed gas Ventilator airway circuit
  • Volume.compressed gas
  • Gases; Lung; Point in time; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; Vent airway circuit; Vent away; Vol; Vol compressed gas; 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 compressed gas Ventilator airway circuitVol compressed gas Vent airway circuitVolume.compressed gasPULMVolPtVentilator airway circuit

Frequently asked questions

Code details

Code20138-4
SystemLOINC
Display nameVolume compressed gas Ventilator airway circuit
DescriptionVolume.compressed gas
Short nameVol compressed gas Vent airway circuit
ComponentVolume.compressed gas
PropertyVol
TimingPt
System (specimen)Ventilator airway circuit
ScaleQn
ClassPULM
Example unitsL
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Volume.compressed gasVolPtVentilator airway circuitQnVolume compressed gasVolumePoint in time (spot)

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.

LOINC Code 20138-4 | HealthAssure