What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 75958-9: Tidal volume expired Respiratory system airway

Name: LOINC Code 75958-9: Tidal volume expired Respiratory system airway
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:56.386Z

75958-9 is a LOINC code used to identify Tidal volume expired Respiratory system airway 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 Tidal volume.expired. It is commonly used with the system or sample type Respiratory system.airway.

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 Tidal volume.expired. It is commonly used with the system or sample type Respiratory system.airway.

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
Order vs observation: Both

What it does not mean

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

Key facts

Tidal volume expired Respiratory system airway
Tidal volume.expired
Breathing; End tidal volume; Lung; Lungs; Point in time; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; RS; TV; Vet; Vol; Vol exp; Volume; VT; VT.expired

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

Tidal volume expired Respiratory system airwayVT.expired AirwayTidal volume.expiredPULMVolPtRespiratory system.airway

Frequently asked questions

Code details

Code75958-9

SystemLOINC

Display nameTidal volume expired Respiratory system airway

DescriptionTidal volume.expired

Short nameVT.expired Airway

ComponentTidal volume.expired

PropertyVol

TimingPt

System (specimen)Respiratory system.airway

ScaleQn

ClassPULM

Example unitsmL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.56

Part names

Tidal volume.expiredVolPtRespiratory system.airwayQnTidal volume expiredVolumePoint in time (spot)Respiratory system airway

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.