LOINC Code 51731-8: SaO2% Calculated from oxygen partial pressure (BldV) [Mass fraction]

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 BldV.

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
• 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 Calculated from oxygen partial pressure in Venous blood
• Oxygen saturation
• Bld ven; Bld venous; Blood - venous; Blood ven; Blood venus; Calc; calc from oxygen partial pressure; Calculation; Chemistry; from pO2; Lung; Mass Fraction; O2; Percent; Point in time; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; SaO2; SAT; Satn; SO2; tO2; Venous

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

Frequently asked questions