Version 2.77

Term Description

The RDW-SD is determined from the RBC volume distribution curve. It is calculated from the width of the curve at 20% of the peak count.
Source: Regenstrief LOINC

Part Description

LP17698-9   Erythrocyte distribution width
Red Cell Distribution Width (RDW) is a measurement of anisocytosis. RDW is elevated in iron deficiency anemia and beta thalassemia major and usually normal in beta thalassemia minor. RDW has also been shown to be significantly increased in pregnant women during gestational week 34 through labor onset. Information from Laboratory Test Handbook, Jacobs DS, DeMott WR,Oxley DK;LexiComp,2001. Source: Regenstrief Institute

Reference Information

Type Source Reference
Mapping Guidance Regenstrief Help Erythrocyte distribution width (EDW) can be reported with units of % or volume (fL). For units reported as %, use [LOINC: 788-0]. For EDW reported in volume units, use [LOINC: 21000-5]. Mapper’s Guide for the Top 2000 plus LOINC Laboratory Observations

Fully-Specified Name

Component
Erythrocyte distribution width
Property
EntVol
Time
Pt
System
RBC
Scale
Qn
Method
Automated count

Additional Names

Short Name
RDW RBC Auto
Display Name
Erythrocyte distribution width Auto (RBC) [Entitic vol]
Consumer Name Alpha Get Info
Red Blood Cell Distribution Width (RDW), Red blood cells

Basic Attributes

Class
HEM/BC
Type
Laboratory
First Released
Version 1.0m
Last Updated
Version 2.73
Order vs. Observation
Observation
Common Test Rank Get Info
147

Member of these Panels

LOINC Long Common Name
58410-2 CBC panel - Blood by Automated count
57021-8 CBC W Auto Differential panel - Blood
57782-5 CBC W Ordered Manual Differential panel - Blood
57022-6 CBC W Reflex Manual Differential panel - Blood
24364-2 Obstetric 1996 panel - Serum and Blood

Language Variants Get Info

Tag Language Translation
de-DE German (Germany) Erythrozytenverteilungsbreite:Entitisches Volumen:Zeitpunkt:Erythrozyten:Quantitativ:Automatisierte Zählung
Synonyms: Ery-Größenvariabilität; RDW; Red Blood Cell Distribution Width; EVB; RBC
es-AR Spanish (Argentina) ancho de distribución eritrocitaria:volumen entítico:punto en el tiempo:eritrocitos:cuantitativo:recuento automático
es-ES Spanish (Spain) Ancho de distribución eritrocitaria:Volumen entítico:Punto temporal:Glóbulos rojos:Qn:Contaje automático
Synonyms: Cuantitativo
es-MX Spanish (Mexico) Ancho de distribución de eritrocitos:Volumen entítico:Punto temporal:Eritrocitos:Cuantitativo:Recuento automatizado
fr-CA French (Canada) Indice de distribution des volumees érythrocytaires:Volume entitique:Temps ponctuel:GR:Quantitatif:Décompte automatisé
fr-FR French (France) Indice de distribution érythrocytaire:Volume d'entité:Ponctuel:Érythrocytes:Numérique:Comptage automate
fr-BE French (Belgium) Indice de distribution de volume érythrocytaire:Volume entitique:Temps ponctuel:GR:Quantitatif:Décompte automatisé
Synonyms: VGW
it-IT Italian (Italy) Eritrociti, ampiezza distribuzione:EntVol:Pt:RBC:Qn:Conta automatica
Synonyms: Ampiezza di distribuzione degli eritrociti Ematologia (coagulazione) conta differenziale Globuli rossi Punto nel tempo (episodio) Volume entitico
ko-KR Korean (Korea, Republic Of) 적혈구 분포 폭:측정물질의 부피:검사시점:적혈구:정량:자동계수
nl-NL Dutch (Netherlands) erytrocyten distributiebreedte:volume/eenheid:moment:erytrocyten:kwantitatief:geautomatiseerde telling
Synonyms: RDW rode bloedcellen
pl-PL Polish (Poland) Rozpiętość rozkładu objętości erytrocytów:objętość zawarta w:punkt w czasie:krwinki czerwone:ilościowy:automatyczne liczenie
pt-BR Portuguese (Brazil) Amplitude de distribuição do tamanho dos eritrócitos:EntVol:Pt:Eritroc:Qn:Contagem automática
Synonyms: ; RDW; Erythrocyte morphology index; RCMI; Erythrocytes; Red blood corpusles; Red blood corpuscle; Red blood cell; Red cell; Red cells; Discocyte; Erc; Red blood cells; Entitic volume; Point in time; Random; Quantitative; QNT; Quant; Quan; Auto; HEMATOLOGY/CELL COUNTS; HEMATOLOGY/CELL COUNTS; RDW-SD
ru-RU Russian (Russian Federation) Эритроцит распределение ширина:СущнОб:ТчкВрм:Эритроциты:Колич:Автоматизированный подсчет
Synonyms: Индекс ширины кривой распределения объема эритроцитов Количественный Сущность объём Точка во времени;Момент
tr-TR Turkish (Turkey) Eritrosit dağılım genişliği:EntHcm:Zmlı:Eritrosit:Kant:Otomatize sayım
Synonyms: RBC
uk-UA Ukrainian (Ukraine) Ширина розподілу еритроцитів:Ентитичний Об'єм:МоментЧасу:Еритроцити:Кількісно:Автоматизований підрахунок
Synonyms: Auto; Automated detection; Discocyte; Elec; Elect; Electr; Entitic volume; Erc; Erythrocyte morphology index; Erythrocytes; HEMATOLOGY/CELL COUNTS; Point in time; QNT; Quan; Quant; Quantitative; Random; RBC; RCMI; RDW; RDW-SD; Red blood cell; Red blood cells; Red blood corpuscle; Red blood corpusles; Red cell; Red cells
zh-CN Chinese (China) 红细胞分布宽度:实体体积:时间点:红细胞:定量型:自动化计数方法
Synonyms: RBC;RBCS;红血球;红血细胞;赤血球 RBC;盘状细胞;红血球;红血细胞 RDW-SD 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 实体容积 宽 时刻;随机;随意;瞬间 电子化 红细胞体积分布宽度-SD 红细胞体积分布宽度标准差 红细胞分布宽度（Erythrocyte Distribution Width，RDW）;红细胞形态学指数;红细胞形态学指数（Erythrocyte morphology index）;红细胞形态学指标 红细胞分布宽度-SD 红细胞分布宽度标准差 自动 自动化计数;自动化计数类实验室方法;自动化计数类方法;自动化计数类检验方法;自动计数;自动计数方法;自动计数法;自动计数类实验室方法;自动计数类方法;自动计数类检验方法 自动型 自动法;自动化 血液学/细胞计数;血液学与细胞计数

Example Units

Unit Source
fL Example UCUM Units
fL eCHN

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

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=21000-5