LOINCActive

LOINC Code 19981-0: Oxygen [Partial pressure] (8 hour maximum) in Capillary blood

19981-0 is a LOINC code used to identify Oxygen [Partial pressure] (8 hour maximum) in Capillary blood 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. It is commonly used with the system or sample type BldC.

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. It is commonly used with the system or sample type BldC.

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

What it does not mean

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

Key facts

  • Oxygen [Partial pressure] (8 hour maximum) in Capillary blood
  • Oxygen
  • 1/3 day; 8 hours; 8HR; Blood - capillary; Cap bld; Cap blood; Capillary bld; Capillary blood; Finger stick; Lung; Maximum; O2; O2 partial pressure; Partial pressure; PO2; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Respiratory; 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

Oxygen [Partial pressure] (8 hour maximum) in Capillary bloodpO2 8h Max BldCOxygenPULMPPres8H^maxBldC

Frequently asked questions

Code details

Code19981-0
SystemLOINC
Display nameOxygen [Partial pressure] (8 hour maximum) in Capillary blood
DescriptionOxygen
Short namepO2 8h Max BldC
ComponentOxygen
PropertyPPres
Timing8H^max
System (specimen)BldC
ScaleQn
ClassPULM
Example unitsmm Hg
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.54

Part names

OxygenPPres8H^maxBldCQnPartial pressure8HmaxBlood capillary

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.

LOINC Code 19981-0 | HealthAssure