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.

LOINCObservation

LOINC Code 40590-2: Deprecated Oxygen saturation^pre exercise: SFr: Pt: BldA: Qn: Oximetry

Name: LOINC Code 40590-2: Deprecated Oxygen saturation^pre exercise: SFr: Pt: BldA: Qn: Oximetry
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.146Z

40590-2 is a LOINC code used to identify Deprecated Oxygen saturation^pre exercise: SFr: Pt: BldA: Qn: Oximetry 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 Oxygen saturation^pre exercise. It is commonly used with the system or sample type BldA.

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 Oxygen saturation^pre exercise. It is commonly used with the system or sample type BldA.

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
Order vs observation: Observation
Method: Oximetry

What it does not mean

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

Key facts

Deprecated Oxygen saturation^pre exerciseSFr: Pt: BldA: Qn: Oximetry

Oxygen saturation^pre exercise

ABG; ART; Art bld; Art blood; Arterial; Arterial blood; Before; Blood arterial; EXCZ; Hemodynamics; HEMODYNAMICS.MOLEC; Mass Fraction; O2; Percent; Point in time; pre Exc; Pre exercise; QNT; Quan; Quant; Quantitative; Random; SaO2; SAT; Satn; SO2; tO2

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 Oxygen saturation^pre exercise: SFr: Pt: BldA: Qn: OximetryDeprecatedOxygen saturation^pre exerciseOxygen saturation^pre exerciseHEMODYN.MOLECMFrPtBldA

Frequently asked questions

Code details

Code40590-2

SystemLOINC

Display nameDeprecated Oxygen saturation^pre exercise: SFr: Pt: BldA: Qn: Oximetry

DescriptionOxygen saturation^pre exercise

Short nameDeprecatedOxygen saturation^pre exercise

ComponentOxygen saturation^pre exercise

PropertyMFr

TimingPt

System (specimen)BldA

ScaleQn

MethodOximetry

ClassHEMODYN.MOLEC

Example units%

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.46

Part names

Oxygen saturation^pre exerciseMFrPtBldAQnOximetryMass fractionPoint in time (spot)Blood arterial

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.