Nomogram of fetal middle cerebral artery peak systolic velocity at 23-35 weeks of gestation in a Brazilian population: pilot study.
J Matern Fetal Neonatal Med
; 21(10): 714-8, 2008 Oct.
Article
en En
| MEDLINE
| ID: mdl-19012187
ABSTRACT
OBJECTIVE:
To establish normative data for the peak systolic velocity of the middle cerebral artery (MCA-PSV) of fetuses in the second half of pregnancy using multiples of the median and percentile reference range.METHODS:
A cross-sectional study was performed in 90 healthy fetuses at between 23 and 35 weeks of gestation. A bi-dimensional axial scan of the brain, including the thalami and cavitas septi pellucidi was obtained. The circle of Willis was visualized using color flow mapping. Pulsed-wave Doppler velocimetry of the MCA was performed close to the artery's origin, with a beam-vessel angle below 20 degrees . A table with the multiples of the median (MoM) of the MCA-PSV for each gestational age was generated and Pearson's correlation coefficient (r) was calculated. Regression modeling across gestational age was performed to obtain the reference values.RESULTS:
There was a strong correlation between the MCA-PVS and gestational age (r = 0.70; p < 0.001). Values for the MCA-PSV for the following MoM were calculated 1.0, 1.29, 1.50, and 1.55. The MCA-PSV 2.5(th) and 97.5(th) centiles ranged from 24.33 cm(2)/s to 78.36 cm(2)/s, respectively, between weeks 23 and 35.CONCLUSIONS:
A nomogram for the fetal MCA-PSV during the second half of pregnancy was generated.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Segundo Trimestre del Embarazo
/
Tercer Trimestre del Embarazo
/
Ultrasonografía Prenatal
/
Arteria Cerebral Media
/
Nomogramas
Tipo de estudio:
Diagnostic_studies
/
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Límite:
Female
/
Humans
/
Pregnancy
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
J Matern Fetal Neonatal Med
Asunto de la revista:
OBSTETRICIA
/
PERINATOLOGIA
Año:
2008
Tipo del documento:
Article
País de afiliación:
Brasil