Version 2.78

Term Description

A ratio with numerator = arterial oxygen partial pressure (PaO2) in mmHg and denominator = fraction of inspired oxygen (FIO2) with no units. If the patient is breathing room air (21% O2) the fraction would be 0.21. It is reported in mmHg. It is a well established marker for lung function during mechanical ventilation and used in many acuity scores like SAPS II, SAPS III, and SOFA.
Source: Regenstrief LOINC

Fully-Specified Name

Component
Horowitz index
Property
Ratio
Time
Pt
System
BldA+Inhl gas
Scale
Qn
Method

Additional Names

Short Name
Horowitz index BldA+IhG-Rto
Display Name
Horowitz index (BldA+Inhl gas) [Ratio]
Consumer Name Alpha Get Info
Horowitz index, BldA+Inhl Gas

Basic Attributes

Class
CHEM
Type
Laboratory
First Released
Version 2.22
Last Updated
Version 2.73
Change Reason
Release 2.70: DefinitionDescription: Updated for accuracy;
Order vs. Observation
Both
Common Test Rank Get Info
1912

Formula (Readable)

arterial oxygen partial pressure [(PaO2) in mmHg]/ fraction of inspired oxygen

Member of these Panels

LOINC Long Common Name
96789-3 Sequential Organ Failure Assessment SOFA

Language Variants Get Info

Tag Language Translation
es-ES Spanish (Spain) Indice Horowitz:Fracción:Punto temporal:Sangre arterial y gas inhalado:Qn:
Synonyms: Cuantitativo
es-MX Spanish (Mexico) Índice de Horowitz:Proporción:Punto temporal:Sangre arterial y gases inhalados:Cuantitativo:
fr-CA French (Canada) Indices d'Horowitz:Ratios:Temps ponctuel:Sang artériel+Gaz inhalé:Quantitatif:
fr-FR French (France) Index Horowitz:Ratio:Ponctuel:Sang artériel+Gaz inhalé:Numérique:
fr-BE French (Belgium) Indices d'Horowitz:Ratios:Temps ponctuel:Sang artériel+Gaz inhalé:Quantitatif:
it-IT Italian (Italy) Horowitz, indice:Rapporto:Pt:Sangue art+Gas inalati:Qn:
Synonyms: Chimica Gas inalati Indice di Horowitz Punto nel tempo (episodio) Sangue arterioso Sangue arterioso & Gas inalati
nl-NL Dutch (Netherlands) Horowitz-index:verhouding:moment:arterieel bloed en geïnhaleerd gas:kwantitatief:
pt-BR Portuguese (Brazil) Horowitz index:Ratio:Pt:SgArt+Gas inalado:Qn:
Synonyms: PaO2/FiO2; Rto; Point in time; Random; BldA+IhG; IhG; Inhaled Gas; Inspired; BldA+IhG; Blood; Blood arterial; ART; Bld art; Bld arterial; Blood art; Art blood; Art bld; AcG; Quantitative; QNT; Quant; Quan; Gases; Chemistry
ru-RU Russian (Russian Federation) Горовица индекс:Отношение:ТчкВрм:КрА+Ингал газ:Колич:
Synonyms: Индекс Горовица Количественный Коэффициент;Соотношение;Пропорция Кровь артериальная Кровь артериальная и Ингалированный газ Точка во времени;Момент
tr-TR Turkish (Turkey) Horowitz indeksi:Oran:Zmlı:KanArt+Soln gaz:Kant:
zh-CN Chinese (China) Horowitz 指数:比率:时间点:动脉全血+吸入的气体:定量型:
Synonyms: Horowitz index;PaO2/FiO2;哈氏指数;哈洛维茨指数;哈鲁维兹指数 动脉全血（动脉血）+吸入气;动脉全血+吸入气体;动脉全血+吸入的空气;动脉血+吸入气;动脉血+吸入气体;动脉血+吸入的气体;动脉血+吸入的空气 动脉血 化学;化学检验项目;化学检验项目类;化学类;化学试验;非刺激耐受型化学检验项目;非刺激耐受型化学检验项目类;非刺激耐受型化学试验;非刺激耐受型化学试验类 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 吸入气;吸入气体;吸入的空气 时刻;随机;随意;瞬间 来自于不同体系的两个观察指标之比;比;比值 气 气体类 空气

Example Units

Unit Source
mm[Hg] Example UCUM Units

LOINC Terminology Service (API) using HL7® FHIR® Get Info

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=50984-4