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.

LOINC

LOINC Code 19944-8: Deprecated Gas flow^at 25-75% of forced expiration: VRat: Pt: Respiratory system.airway: Qn: Predicted

Name: LOINC Code 19944-8: Deprecated Gas flow^at 25-75% of forced expiration: VRat: Pt: Respiratory system.airway: Qn: Predicted
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.843Z

19944-8 is a LOINC code used to identify Deprecated Gas flow^at 25-75% of forced expiration: VRat: Pt: Respiratory system.airway: Qn: Predicted 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 Gas flow^at 25-75% of forced expiration. 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 Gas flow^at 25-75% of forced expiration. 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: DEPRECATED
Method: Predicted

What it does not mean

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

Key facts

Deprecated Gas flow^at 25-75% of forced expirationVRat: Pt: Respiratory system.airway: Qn: Predicted

Gas flow^at 25-75% of forced expiration

@ 25-75% of FEF; Breathing; Dynamic; Exp; FEF 25-75%; Flow; Forced expiratory flow rate; Gases; Lung; Lungs; Point in time; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; RS; Volume rate; vRate

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

Deprecated Gas flow^at 25-75% of forced expiration: VRat: Pt: Respiratory system.airway: Qn: PredictedDeprecatedGas flow^at 25-75% of forced eGas flow^at 25-75% of forced expirationPULMVRatPtRespiratory system.airway

Frequently asked questions

Code details

Code19944-8

SystemLOINC

Display nameDeprecated Gas flow^at 25-75% of forced expiration: VRat: Pt: Respiratory system.airway: Qn: Predicted

DescriptionGas flow^at 25-75% of forced expiration

Short nameDeprecatedGas flow^at 25-75% of forced e

ComponentGas flow^at 25-75% of forced expiration

PropertyVRat

TimingPt

System (specimen)Respiratory system.airway

ScaleQn

MethodPredicted

ClassPULM

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.40

Part names

Gas flow^at 25-75% of forced expirationVRatPtRespiratory system.airwayQnPredictedVolume RatePoint 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.