40721-3

Hemoglobin F [Presence] in Specimen by Apt-Downey method

Active

Part Description

LP16428-2 Hemoglobin F
Hemoglobin F is used to screen for fetal-to-maternal hemorrrhage. The presence of fetal red cells in the maternal circulation may be identified by use of the acid elution principle first described by Kleihauer, Brown, and Betke, or by several modifications. Very small volumes of red cells commonly escape from the fetal intravascular compartment across the placental barrier into the maternal intervillous space. Source: Regenstrief Institute

Fully-Specified Name

Component: Hemoglobin F
Property: PrThr
Time: Pt
System: XXX
Scale: Ord
Method: Apt-Downey

Additional Names

Long Common Name: Hemoglobin F [Presence] in Specimen by Apt-Downey method
Short Name: Hgb F Spec Ql Apt-Downey
Display Name: Hemoglobin F Apt-Downey method Ql (Specimen)
Consumer Name Alpha Get Info: Hemoglobin F, Specimen

Basic Attributes

Class: HEM/BC
Type: Laboratory
First Released: Version 2.15
Last Updated: Version 2.73 (MIN)
Change Reason: The PrThr property is used for LOINC terms whose results are reported using an ordered categorical scale, regardless of whether or not an internal threshold was used to make that determination. This change was approved by the Laboratory LOINC Committee in June 2016.
Order vs. Observation: Both
Common Test Rank Get Info: 16911

Language Variants Get Info

Tag	Language	Translation
de-DE	German (Germany)	Hämoglobin F:Nachweis oder Schwellenwert:Zeitpunkt:XXX:Ordinal:Apt-Downey-Methode
el-GR	Greek (Greece)	Αιμοσφαιρίνη F:PrThr:Pt:XXX:Ord:Apt-Downey Synonyms: PrThr Αιμοσφαιρίνη Αιμοσφαιρίνη F
es-ES	Spanish (Spain)	Hemoglobina fetal:PrThr:Punto temporal:XXX:Ord:Test de Apt-Downey
es-MX	Spanish (Mexico)	Hemoglobina F:Presencia o umbral:Punto temporal:XXX:Ordinal:Método apt-Downey
fr-CA	French (Canada)	Hémoglobine F:Présence-Seuil:Temps ponctuel:XXX:Ordinal:Apt-Downey
fr-FR	French (France)	Hémoglobine F:Présence/Seuil:Ponctuel:Milieux divers:Qualitatif:Apt-Downey
fr-BE	French (Belgium)	Hémoglobine F:PrThr:Temps ponctuel:XXX:Ordinal:Apt-Downey Synonyms: Hb HbF
it-IT	Italian (Italy)	Emoglobina F:PrThr:Pt:XXX:Ord:Apt-Downey Synonyms: Ematologia (coagulazione) conta differenziale Metodo Apt-Downey Presenza o Soglia Punto nel tempo (episodio)
ko-KR	Korean (Korea, Republic Of)	혈색소 F:임의농도:검사시점:XXX:순위척도:압트 시험
nl-NL	Dutch (Netherlands)	hemoglobine F:aanwezigheid:moment:XXX:ordinaal:Apt-Downey
pl-PL	Polish (Poland)	Hemoglobina F:granica wykrywalności:punkt w czasie:XXX:półilościowy:metoda Apt-Downey
pt-BR	Portuguese (Brazil)	Hemoglobina F:ACnc:Pt:XXX:Ord:Apt-Downey Synonyms: ; Hgb F; HbF; Fetal hemoglobin; Hb; Haemoglobin; Arbitrary concentration; Point in time; Random; Misc; Miscellaneous; Unspecified; Other; Ql; Ordinal; QL; Qualitative; Qual; Screen; HEMATOLOGY/CELL COUNTS; HEMATOLOGY/CELL COUNTS
tr-TR	Turkish (Turkey)	Hemoglobin F:MevcEşik:Zmlı:XXX:Srl:Apt-Downey Synonyms: Mevcut
zh-CN	Chinese (China)	血红蛋白 F:存在情况或阈值:时间点:XXX:序数型:Apt-Downey 试验法 Synonyms: Apt 检测法;Apt 检测试验;Apt 试验法;Apt-Downey 试验;Apt-Downey 试验 (在标本中加入氢氧化钠，如仍为红色，则出血源自胎儿，如为棕色，则为母血);筛查胎儿细胞是否出现在母亲血液之中的试验 HbF;Hgb F;胎儿血红蛋白不明的;其他;将在相应消息内其他部分之中加以详细说明;未作详细说明的;未作说明的;未做说明的标本;未加规定的;未加说明的标本;杂项依次型;分类顺序型;定性的;序数型（或称等级型）;性质上的;有序型;有序性分类应答;有序性分类结果;秩次型;等级型;筛查;顺序型存在情况;存在;存在与否;是否存在;阈值;界值;界限;阀值;临界值;存在情况（存在、存在与否、是否存在）或阈值（界值、界限、阀值、临界值）时刻;随机;随意;瞬间氧血红蛋白;血红朊;血红素;血色素血液学/细胞计数;血液学与细胞计数

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

CodeSystem lookup: https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=40721-3

LOINC Copyright

Copyright © 2025 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 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.