LOINCActiveObservation

LOINC Code 71843-7: SaO2% Calculated from oxygen partial pressure (BldA) [Pure mass fraction]

71843-7 is a LOINC code used to identify SaO2% Calculated from oxygen partial pressure (BldA) [Pure 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. 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. 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: ACTIVE
  • Order vs observation: Observation
  • Method: Calculated from oxygen partial pressure

What it does not mean

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

Key facts

  • Oxygen saturation [Pure mass fraction] Calculated from oxygen partial pressure in Arterial blood
  • Oxygen saturation
  • Because of the confusion that occurs in countries that report results as both decimal fraction and percent, this property was created to represent decimal fractions that are reported without units.
  • ABG; ART; Art bld; Art blood; Arterial; Arterial blood; Blood arterial; Calc; calc from oxygen partial pressure; Calculation; Chemistry; from pO2; Lung; O2; Point in time; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; 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

SaO2% Calculated from oxygen partial pressure (BldA) [Pure mass fraction]Oxygen saturation [Pure mass fraction] Calculated from oxygen partial pressure in Arterial bloodSaO2 DF BldA from pO2Oxygen saturationCHEMSaO2%, BloodMFr.DF

Frequently asked questions

Code details

Code71843-7
SystemLOINC
Display nameSaO2% Calculated from oxygen partial pressure (BldA) [Pure mass fraction]
DescriptionOxygen saturation
Short nameSaO2 DF BldA from pO2
ComponentOxygen saturation
PropertyMFr.DF
TimingPt
System (specimen)BldA
ScaleQn
MethodCalculated from oxygen partial pressure
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.40
Last changed2.69

Consumer names

SaO2%, Blood

Part names

Oxygen saturationMFr.DFPtBldAQnCalculated from oxygen partial pressureDecimal mass 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.