LOINCActive

LOINC Code 8744-5: Pulmonary blood flow/Systemic blood flow by Oximetry

8744-5 is a LOINC code used to identify Pulmonary blood flow/Systemic blood flow by Oximetry 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 Cardiac output ventricle right/Ventricle left. It is commonly used with the system or sample type Circulatory system.

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 Cardiac output ventricle right/Ventricle left. It is commonly used with the system or sample type Circulatory system.

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: Oximetry

What it does not mean

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

Key facts

  • Pulmonary blood flow/Systemic blood flow by Oximetry
  • Cardiac output ventricle right/Ventricle left
  • Circ; Circ sys; CO; Hemodynamics; HEMODYNAMICS.MOLEC; L; LT; Lung; Point in time; Pulmonary; Pulmonology; QNT; Qp; Qp/Qs; Qs; Quan; Quant; Quantitative; R; Random; Respiratory; RT; Volume ratio

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

Pulmonary blood flow/Systemic blood flow by OximetryQp/Qs OximetryCardiac output ventricle right/Ventricle leftHEMODYN.MOLECVRtoPtCirculatory system

Frequently asked questions

Code details

Code8744-5
SystemLOINC
Display namePulmonary blood flow/Systemic blood flow by Oximetry
DescriptionCardiac output ventricle right/Ventricle left
Short nameQp/Qs Oximetry
ComponentCardiac output ventricle right/Ventricle left
PropertyVRto
TimingPt
System (specimen)Circulatory system
ScaleQn
MethodOximetry
ClassHEMODYN.MOLEC
Example unitsratio
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0h(3)
Last changed2.48

Part names

Cardiac output ventricle right/Ventricle leftVRtoPtCirculatory systemQnOximetryVolume RatioPoint in time (spot)

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 8744-5 | HealthAssure