LOINC
Version 2.71

33154-6Fetal Head Diameter.biparietal estimated from gestational age by method of Merz 1988 (US)Active

Part Description

LP64601-5   Diameter.biparietal
The biparietal diameter (BPD) measurement, using outer-to-outer caliper positioning, is dependent on the head shape of the fetus (using the cephalic index). Due to inaccuracies that can occur with this measurement, the BPD is no longer routinely used for gestational age estimation or determining the appropriateness of fetal size later in pregnancy. Head circumference is the preferred method for measuring fetal head size. [PMID:25044000] Source: Regenstrief LOINC

Fully-Specified Name

Component
Diameter.biparietal
Property
Len
Time
Pt
System
Head^Fetus
Scale
Qn
Method
US.estimated from Merz 1988

Additional Names

Short Name
Fet BPD from GA.Merz88

Basic Attributes

Class
OB.US
Type
Clinical
First Released
Version 2.09
Last Updated
Version 2.70
Order vs. Observation
Observation

Reference Information

Type Source Reference
Book Regenstrief Institute Merz EA. Sonographische Uberwachung der fetalen Knochenentwicklung im II. und III. Trimenon. Eine Studie uber das Wachstum der langen Rohrenknochen im Vergleich zum Kopf- und Rumpfwachstum sowie uber die Verwendungsmoglichkeiten der fetalen Knochenlange im Rahmen der geburtshilflichen Ultraschalluntersuchun. 1988. Fetal Growth Table

Language Variants Get Info

zh-CNChinese (China)
直径.二顶骨:长度:时间点:头部^胎儿:定量型:超声.依据Merz的胎龄估计法.88
fr-BEFrench (Belgium)
Diamètre.bipariétal:Longueur:Temps ponctuel:Tête^Foetus:Quantitatif:US.estimé selon Merz 1988
it-ITItalian (Italy)
Diametro.biparietale:Len:Pt:Testa^feto:Qn:Ecografia.stimata da Merz 1988
pt-BRPortuguese (Brazil)
Diâmetro.biparietal:Comprimento:Pt:Crânio^feto:Qn:US.estimado pela tAcela de Merz.88
es-ARSpanish (Argentina)
US.ESTIMATED FROM MERZ.88:longitud:punto en el tiempo:cabeza^feto:cuantitativo:US.ESTIMATED FROM MERZ.88

Example Units

Unit Source
mm Example UCUM Units

LOINC FHIR® API Example - CodeSystem Request Get Info

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=33154-6