73794-0

LOINC Code


LOINC code73794-0
name
descriptionThe 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).
statusACTIVE

Fully-Specified Name

componentPerfusion index
propertyRatio
timePt  =  Point in time:  To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements.
systemBld.postductal
scaleQn  =  Quantitative:  The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256
methodPulse oximetry

Additional Names

short nameBld 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

Basic Attributes

classCARDIO-PULM
type2  Clinical
order vs. observationPerfusion index
example UCUM units%
The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org)

Member of these Panels

73805-4

History/Usage

first released
last updated2.52
last change typeMIN  - change to field other than name
change reason%

Related Names



Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.

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