LOINC
Version 2.73

33157-9Fetal Head Diameter.biparietal/Diameter.occipital estimated from gestational age by method of Chitty 1994 (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/Diameter.occipital
Property
LenRto
Time
Pt
System
Head^Fetus
Scale
Qn
Method
US.estimated from Chitty 1994

Additional Names

Short Name
Fet BPD/OFD from GA.Chitty94

Basic Attributes

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

Formula (Readable)

Estimated Cephalic Index from gestational age: CI = 0.8927-0.008276* MA-0.0000666* MA3; SD =0.1157+0.006192*MA; Limits: 12-42 weeks

Reference Information

Type Source Reference
Article NCBI PubMed Chitty LS, Altman DG, Henderson A, Campbell S. Charts of fetal size: 2. Head measurements. Br J Obstet Gynaecol. 1994 Jan;101(1):35-43. Link to PubMed

Language Variants Get Info

zh-CNChinese (China)
直径.二顶骨/直径.枕骨:长度比率:时间点:头部^胎儿:定量型:超声.依据Chitty的胎龄估计法.94
fr-BEFrench (Belgium)
Diamètre.bipariétal/Diamètre.occipital:Longueur rapport:Temps ponctuel:Tête^Foetus:Quantitatif:US.estimé selon Chitty 1994
it-ITItalian (Italy)
Diametro.biparietale/Diametro.occipitale:LenRto:Pt:Testa^feto:Qn:Ecografia.stimata da Chitty 1994
pt-BRPortuguese (Brazil)
Diâmetro.biparietal/Diâmetro.occipital:LenRto:Pt:Crânio^feto:Qn:US.estimado pela tAcela de Chitty.94
es-ARSpanish (Argentina)
US.ESTIMATED FROM CHITTY.94:relación de longitud:punto en el tiempo:cabeza^feto:cuantitativo:US.ESTIMATED FROM CHITTY.94
es-MXSpanish (Mexico)
Diámetro.biparietal / Diámetro.occipital:LenRto:Punto temporal:Cabeza ^ feto:Cuantitativo:US.estimated from Chitty 1994

Example Units

Unit Source
mm Example UCUM Units

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