Prenatal measurement of the fetal cerebellum and cisterna cerebellomedullaris by ultrasound

Smith, Philip G.; Johansson, Dawn; Tzannatos, C.; Campbell, Stuart

doi:10.1002/pd.1970060209

Cited by 39 publications

(21 citation statements)

References 17 publications

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“…The biparietal diameter (BPD) was the first fetal parameter to be clinically utilized in the determination of fetal age in the second trimester. Subsequently, several other biometric parameters including head circumference (HC) [20], abdominal circumference (AC) [21], femur length (FL) [22], foot length [23], ear size [24] orbital diameters [25] and cerebellum diameter [26] have been evaluated. In a large study by Chervenak et al that evaluated pregnancies conceived by in vitro, head circumference was found to be the best predictor of gestational age compared with other commonly used parameters [8].…”

Section: Second Trimester Ultrasoundmentioning

confidence: 99%

Sonographic determination of gestational age

Kalish

Chervenak

2005

The Ultrasound Review of Obstetrics & Gynecology

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Objective. To review current evidence regarding sonographic determination of gestational age. Methods. We reviewed current and available data to evaluate optimal methods of gestational age determination. Results. First trimester estimates of gestational age based on crown-rump length and second trimester estimates of gestational age based on composite biometry are very accurate with an absolute error of less than 5 days in the first trimester and 7 days in the second trimester in most cases. Conclusion. Ultrasound is an accurate and useful modality for assessment of gestational age in the first and second trimester of pregnancy and, as a routine part of prenatal care, can greatly impact obstetric management and improve antepartum care.

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Section: Second Trimester Ultrasoundmentioning

confidence: 99%

Sonographic determination of gestational age

Kalish

Chervenak

2005

The Ultrasound Review of Obstetrics & Gynecology

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“…12 Nomograms of transcerebellar diameter measurements against gestational age showed good correlation, and narrow confidence limits. The present study also showed similar results.…”

Section: Figure 2: Ultrasound Scans In Studymentioning

confidence: 99%

Accuracy of transverse cerebellar diameter measurement by ultrasonography in the evaluation of foetal age

Ravindernath

Reddy

2017

Int J Adv Med

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INTRODUCTIONThe commonest problem an obstetrician faces frequently is the assessment of fetal maturity for either prolonging the pregnancy or terminating it, for complications such as fetal distress, pregnancy induced hypertension, diabetes and Rh incompatibility diseases. The means that are widely accepted for estimating fetal maturity are Gestational age, weight of the fetus. The methods used to estimate gestational age (GA) and predict the expected date of delivery are menstrual history, clinical examination, perception of fetal movement and Nagele's rule.1 Nagele's rule is in women with regular cycles and certain LMP, the EDD is calculated by adding 7 days to the first day of the LMP and then adding 9 months. A menstrual history could be misleading for a number of reasons, such as, many women do not accurately recall the first day of last menstrual period, particularly if they are not trying to conceive. LMP may be unreliable or misleading because of oligomenorrhea, abnormal bleeding events, use of oral contraceptives and becoming pregnant in the first ovulatory cycle after a recent ABSTRACT Background: Assessment of accurate gestational age of fetus is very imperative for proper obstetric management of normal as well as IUGR pregnancies. The objective of this study was to evaluate the accuracy of transverse cerebellar diameter as against the conventional parameters of Biparietal diameter, head circumference, abdominal circumference and femur length in normal pregnant mothers between 15 to 40 weeks and in antenatal diagnosis of intrauterine growth retardation. Methods: Study done on 100 women attending antenatal department, 80 were normal pregnancy cases and 20 were clinically suspected IUGR cases. In each patient BPD, HC, AC, FL and TCD was measured. Correlation of TCD was done with other measured parameters as well as with estimated gestational age of fetus. Results: There was no statistically significant difference between the age and parity distributions of two groups It was seen that 18 cases were below the fifth percentile for AC and HC, 19 cases were below the fifth percentile for BPD and 16 cases were below the fifth percentile for FL. In 16 out of 20 cases the TCD values were within the normal range. Only in 4 cases the TCD values were below the 5 th percentile. This difference in number of cases below the 5

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“…11), and this measurement is therefore independent of whether there is tegmento-vermian angulation. According to this method of measurement, 26,29 excluding abnormals, growth of the craniocaudal diameter is linear (Table 1), and this has been confirmed both ultrasonographically 7,8,57,58 and by MR. 59,60 From this, we can predict expected craniocaudal diameter at any gestational age (Fig. 12).…”

Section: The Craniocaudal Diameter Of the Vermismentioning

confidence: 60%

The Fetal Cerebellar Vermis

Robinson¹,

Blasér²,

Toi³

et al. 2007

Ultrasound Quarterly

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Fetal magnetic resonance provides a new tool in the imaging of the posterior fossa and is proving useful in cases that are difficult to assess sonographically by allowing further assessment of the fourth ventricle, cisterna magna, and vermian growth and development. We describe various criteria with which to evaluate vermian growth, including vermian biometry and the relationship between the superior and inferior lobes. We demonstrate 2 markers of normal vermian development: the primary fissure and fastigial point. We illustrate the tegmento-vermian angle, "closure" of the fourth ventricle, and communication of the fourth ventricle with the basal cisterns during development and in several disorders. We correlate those features with the expected embryological course of development and illustrate identification of these features and associated abnormalities of the posterior fossa, brain stem, and central nervous system in mid-trimester scans of fetuses with abnormal development. Correlation with contemporaneous ultrasound examinations is demonstrated.

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Prenatal measurement of the fetal cerebellum and cisterna cerebellomedullaris by ultrasound

Cited by 39 publications

References 17 publications

Sonographic determination of gestational age

Sonographic determination of gestational age

Accuracy of transverse cerebellar diameter measurement by ultrasonography in the evaluation of foetal age

The Fetal Cerebellar Vermis

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