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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.

LOINC Names Get Info

Fully-Specified Name
Horowitz index:Ratio:Pt:BldA+Inhl gas:Qn:
Long Common Name
Horowitz index in Arterial blood
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

Part Model Get Info

  • Component
    Horowitz index
    LP65891-1
    • Analyte
      Horowitz index
      LP65891-1
      • Component Numerator
        Horowitz index
        LP65891-1
        • Component Numerator Core
          Horowitz index
          LP65891-1
        • Component Numerator Core Suffix
          NULL
           
      • Component Denominator
        NULL
         
        • Component Denominator Core
          NULL
           
        • Component Denominator Core Suffix
          NULL
           
    • Challenge
      NULL
       
    • Adjustment
      NULL
       
    • Count
      NULL
       
  • Property
    Ratio
    LP6852-0
  • Time
    Pt
    LP6960-1
  • System
    BldA+Inhl gas
    LP65894-5
    • System Core
      BldA+Inhl gas
      LP65894-5
    • Super System
      NULL
       
  • Scale
    Qn
    LP7753-9
  • Method
    NULL
     

Basic Attributes

Class
CHEM
Type
Laboratory
First Released
Version 2.22
Last Updated
Version 2.73 (MIN)
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

LOINCLong Common Name
96789-3Sequential Organ Failure Assessment SOFA

Member of these Groups Get Info

LOINC GroupGroup Name
LG52051-6Horowitz & adjusted|BLDA+Inhaled gas

Language Variants Get Info

TagLanguageTranslation
cs-CZCzech (Czechia)Horowitzův index:Poměr:Časový bod:Krev arteriální a plyn vdechovaný:Kvantitativní:
de-DEGerman (Germany)Horowitz-Index:Verhältnis:Zeitpunkt:BldA+Inhl-Gas:Quantitativ:
el-GRGreek (Greece)Δείκτης Horowitz:Ratio:Pt:Αρτηριακό αίμα+Εισπνεόμενο αέριο:Qn:
Synonyms: CHEM Pt Qn Ratio Αέριο Αρτηριακό αίμα Αρτηριακό αίμα+Εισπνεόμενο αέριο Δείκτης Horowitz Εισπνεόμενο αέριο
es-ESSpanish (Spain)Indice Horowitz:Fracción:Punto temporal:Sangre arterial y gas inhalado:Qn:
Synonyms: Cuantitativo
es-MXSpanish (Mexico)Índice de Horowitz:Proporción:Punto temporal:Sangre arterial y gases inhalados:Cuantitativo:
fr-CAFrench (Canada)Indices d'Horowitz:Ratios:Temps ponctuel:Sang artériel+Gaz inhalé:Quantitatif:
fr-FRFrench (France)Index Horowitz:Ratio:Ponctuel:Sang artériel+Gaz inhalé:Numérique:
fr-BEFrench (Belgium)Indices d'Horowitz:Ratios:Temps ponctuel:Sang artériel+Gaz inhalé:Quantitatif:
it-ITItalian (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-NLDutch (Netherlands)Horowitz-index:verhouding:moment:arterieel bloed en geïnhaleerd gas:kwantitatief:
pl-PLPolish (Poland)Wskaźnik Horowitza:współczynnik:punkt w czasie:krew tętnicza i wdychany gaz:ilościowy:
Synonyms: Wskaźnik oksygenacji
pt-BRPortuguese (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-RURussian (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-TRTurkish (Turkey)Horowitz indeksi:Oran:Zmlı:KanArt+Soln gaz:Kant:
zh-CNChinese (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

UnitSource
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