LOINC Code 73794-0: Perfusion index Blood Postductal Pulse oximetry

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 Perfusion index. It is commonly used with the system or sample type Bld.postductal.

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: Pulse oximetry

What it does not mean

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

Key facts

• Perfusion index Blood Postductal Pulse oximetry
• Perfusion index
• The perfusion index measures the strength of the pulse at a sensor site and is the ratio of the pulsatile and nonpulsatile components of the pulse oximetry signal. Postductal measurement indicates that the measurements are taken using a pulse oximetry device placed in an anatomical location whose blood supply originates from the aorta after the junction of the aorta with the ductus arteriorsus (usually either the right or left foot).
• Bld Postductal; Bld.foot; BldA.foot; Blood; Cardio; Cardiology; CARDIO-PULM; Heart Disease; Lung; PF; Point in time; Postductal blood; Pulmonary; Pulmonology; PulseOx; QNT; Quan; Quant; Quantitative; Random; Ratios; Respiratory; Rto; SpO2; WB; Whole blood

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