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 2712-8: SaO2% from pCO2 (Bld) [Mass fraction]

Name: LOINC Code 2712-8: SaO2% from pCO2 (Bld) [Mass fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:14.098Z

2712-8 is a LOINC code used to identify SaO2% from pCO2 (Bld) [Mass fraction] 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.calc from carbon dioxide.partial pressure. It is commonly used with the system or sample type Bld.

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.calc from carbon dioxide.partial pressure. It is commonly used with the system or sample type Bld.

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

What it does not mean

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

Key facts

Deprecated Oxygen saturation.calc from carbon dioxide.partial pressure
Oxygen saturation.calc from carbon dioxide.partial pressure
Blood; Calculated; Carbonic anhydride; Chemistry; CO2; Mass fraction; O2; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; SaO2; SaO2% from pCO2; SAT; Satn; SO2; sO2c; tO2; WB; Whole blood

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

SaO2% from pCO2 (Bld) [Mass fraction]Deprecated Oxygen saturation.calc from carbon dioxide.partial pressureDeprecated O2 Satn from pCO2 Fr BldOxygen saturation.calc from carbon dioxide.partial pressureCHEMSaO2% From PCO2, BloodMFr

Frequently asked questions

Code details

Code2712-8

SystemLOINC

Display nameSaO2% from pCO2 (Bld) [Mass fraction]

DescriptionOxygen saturation.calc from carbon dioxide.partial pressure

Short nameDeprecated O2 Satn from pCO2 Fr Bld

ComponentOxygen saturation.calc from carbon dioxide.partial pressure

PropertyMFr

TimingPt

System (specimen)Bld

ScaleQn

ClassCHEM

Example units%

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.70

Consumer names

SaO2% From PCO2, Blood

Part names

Oxygen saturation.calc from carbon dioxide.partial pressureMFrPtBldQnOxygen saturation.calculated from carbon dioxide.partial pressureMass fractionPoint in time (spot)Blood

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.