UDK: 618.33

NORMAL SIZE VALUES FOR FETAL CISTERNA MAGNA IN SECOND TRIMESTER OF PREGNANCY

O. I. Kozlova

Институт повышения квалификации Федерального медико-биологического агентства России, Москва

Abstract

Fetal brain was retrospectively evaluated in 385 normal fetuses at 16—27 weeks of gestation. A multiplanar brain reconstruction mode was used to obtain the axial cerebral plane which passes through the cerebellum. All measurements were performed from the posterior aspect of the cerebellum to the inner surface of the occipital bone. The key research findings showed that the depth of the cisterna magna tends to increase during the second trimester and makes up 2.8 (range 2,1—4,3) mm at 16/0—16/6 weeks to 6.4 (range 4,4—8,4) mm at 26/0—26/6 weeks. The established percentile depth values for the fetal cisterna magna (mean, 5th and 95th percentile) can be used to assess normal fetal brain development while performing ultrasound in the second trimester of pregnancy.

Keywords

fetus, second trimester, cisterna magna, ultrasound examination.

Contacts

Козлова Олеся Ивановна — ассистент кафедры ультразвуковой и пренатальной диагностики Института повышения квалификации Федерального медико- биологического агентства, е-mail: olesya_poberii@mail.ru