LOINCActive

LOINC Code 19904-2: Carbon dioxide [Partial pressure] in Capillary blood by Transcutaneous CO2 monitor --pre bronchodilation

19904-2 is a LOINC code used to identify Carbon dioxide [Partial pressure] in Capillary blood by Transcutaneous CO2 monitor --pre bronchodilation 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 Carbon dioxide^pre bronchodilation. 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 Carbon dioxide^pre bronchodilation. 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
  • Method: Transcutaneous CO2 monitor

What it does not mean

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

Key facts

  • Carbon dioxide [Partial pressure] in Capillary blood by Transcutaneous CO2 monitor --pre bronchodilation
  • Carbon dioxide^pre bronchodilation
  • Before; Blood - capillary; Cap bld; Cap blood; Capillary bld; Capillary blood; Carbonic anhydride; cO2; Finger stick; Lung; Partial pressure; PCO2; Point in time; pre BD; PTC; PTCCO2; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; TcCo2; TCP; TCPCO2

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

Carbon dioxide [Partial pressure] in Capillary blood by Transcutaneous CO2 monitor --pre bronchodilationpCO2 pre BD BldC TcCo2Carbon dioxide^pre bronchodilationPULMPPresPtBldC

Frequently asked questions

Code details

Code19904-2
SystemLOINC
Display nameCarbon dioxide [Partial pressure] in Capillary blood by Transcutaneous CO2 monitor --pre bronchodilation
DescriptionCarbon dioxide^pre bronchodilation
Short namepCO2 pre BD BldC TcCo2
ComponentCarbon dioxide^pre bronchodilation
PropertyPPres
TimingPt
System (specimen)BldC
ScaleQn
MethodTranscutaneous CO2 monitor
ClassPULM
Example unitsmm Hg
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.34

Part names

Carbon dioxide^pre bronchodilationPPresPtBldCQnTranscutaneous CO2 monitorPartial pressurePoint in time (spot)Blood 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.