A Comparison of Clinical and Ultrasonic Estimation of Fetal Weight

Sherman, Dan; Arieli, Shlomo; Tovbin, Josef; Siegel, Gabriela; Caspi, Eliahu; Bukovsky, Ian

doi:10.1016/s0029-7844(97)00654-6

Cited by 140 publications

(118 citation statements)

References 14 publications

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“…There are several methods of estimating intrauterine fetal weight like tactile assessment of the fetal size, risk factors assessment, maternal self estimation and ultrasonography. 1,2 The advantage of the ultrasonographic technique is that it relies on linear and/or planar measurement of in-utero fetal dimensions that can be defined objectively and are reproducible. 3 Multiple formulae have been developed for the estimation of birth weight using ultrasound measurement; using abdominal circumference (AC) alone, AC and biparietal diameter (BPD) and AC, BPD and femur length.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of sonographic fetal weight estimation in a tertiary care hospital in Bharatpur, Nepal

Prasad

Poudel

Chhetry

2017

J Coll Med Sci-Nepal

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Background & Objectives: Among the var ious methods used in the estimation of intrauterine fetal weight, sonographic fetal weight estimation is the one and has become an important component of antenatal care. The study was conducted with objective to assess the accuracy and reliability of ultrasound estimation of fetal weight in women with a singleton term pregnancy. Materials & Methods: This was a prospective cross-sectional study of 120 women with singleton term pregnancies. Ultrasound estimated fetal weight was calculated by measuring the biparietal diameter and abdominal circumference. The estimated fetal weight was compared to the actual birth weight post delivery. The correlation between estimated fetal weight and actual birth weight was assessed by Pearson's correlation coefficient and the accuracy of sonographic fetal weight estimation was measured using mean error, mean absolute error, mean percentage error, mean absolute percentage error and proportion of estimates within 10% of actual birth weight. Results were tested at error level set at p ≤ 0.05. Results: Mean estimated and actual birth weights were 2863.5 ± 441.9 g and 2822.5 ± 407.7 g respectively. There was a strong positive correlation between estimated fetal weight and actual birth weight (r= 0.71, p <0.001). The mean percentage error and mean absolute percentage error of ultrasound fetal weight estimations were 1.9 ± 11.4% and 8.8 ± 7.5% respectively. Conclusion: Sonogr aphically estimated fetal weight had str ong positive correlation with actual birth weight and thus sonography can be used in the estimation of fetal weight for the better perinatal outcome. Key words: Actual bir th weight; Ultr asonogr aphically estimated fetal weight Citation: Pr asad VN, Poudel P, Chhetr y PK. Accur acy of sonogr aphic fetal weight estimation in a tertiary care hospital in Bharatpur, Nepal. JCMS Nepal. 2016;12(4):174-8. 175 weight estimation algorithm in College of Medical Sciences, Bharatpur. MATERIALS AND METHODSThis was a prospective cross-sectional study conducted during the period January 2015 to January 2016 at College of Medical SciencesTeaching Hospital (COMS TH), Bharatpur. The study included 120 normal antenatal women at term pregnancy (37 to 42 weeks of gestation) who were assessed clinically at the department of obstetrics and gynaecology and referred to the radiology department for ultrasonography. Informed consent of the patient and approval from the ethical committee of the institution was obtained prior to the procedure. The exclusion criteria were multiple pregnancy, IUGR (Intrauterine Growth Retardation), stillbirth, congenital fetal malformations, hydrops fetalis, diabetes mellitus in mother and delivery after seven days of ultrasonic fetal weight estimation. Ultrasonography of each case included in the study was done using Samsung Medison ACCUVIX A30 ultrasound equipment with a scanner frequency of 3.5 MHz to assess fetal viability, fetal presentation, biparietal diameter, head circumference, abdominal circumference, femur l...

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Section: Introductionmentioning

confidence: 99%

Accuracy of sonographic fetal weight estimation in a tertiary care hospital in Bharatpur, Nepal

Prasad

Poudel

Chhetry

2017

J Coll Med Sci-Nepal

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“…For instance, management of diabetic pregnancy, vaginal birth after a previous caesarean section, and intrapartum management of fetuses presenting by the breech will be greatly influenced by estimated fetal weight. 8,9 During the initial era or before the birth of science fetal weight estimation was more a kind guess work. The cardinal importance of knowledge of the size and shape of the fetal head in order to understand the mechanism of labor was first recognized by Smellie (1752) who also pointed out that it is the biparietal diameter which passes through the narrowest part of the pelvic brim.…”

Section: Introductionmentioning

confidence: 99%

COMPARATIVE STUDY FOR ESTIMATION OF FETAL WEIGHT BY CLINICAL & ULTRASONOGRAPHICAL METHODS IN TERM PATIENTS

Ratwani¹,

Madkar²,

Deshpande³

et al. 2010

jemds

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BACKGROUND: Accurate determination of fetal birth weight prior to delivery can have significant bearing on management decision in labor, thereby markedly improving perinatal outcome. OBJECTIVE: To assess fetal weight in term pregnancy by different clinical and ultrasonographical methods. MATERIALS AND METHODS: The study was conducted in Obstetrics and Gynecology department of Dr. D.Y. Patil Medical College, Pimpri, Pune. Two hundred (200) women were selected and studied for a period of one year based on convenience sampling from October 2011 to September 2013.The fetal weight was estimated a week prior to the delivery by both ultrasound and clinical examination. Various formulae's for estimation of fetal weight were applied based on Ultrasound and clinical parameters. All results arising from different formulas were studied and suitable statistics was applied and compared to have clear idea regarding results. RESULTS: All results arising from different formulas were studied by Descriptive statistics and compared with Actual weight at the time of delivery (gold standard). A box plot was used to differentiate various methods used for estimation of fetal weight, It shows that Johnson, Dawn formula and weight in gms (Dare's) formula corresponds with the base line indicating that they can predict birth weight correctly and among these Johnson showed promising results, whereas formulas like Campbell, Comb's, Hadlock and Warsof didn't predict birth weight as accurately as the three clinical methods used, thus in our study it can be seen that clinical methods are better predictors of birth weight than ultrasonographic methods. CONCLUSIONS: In our study it was observed that Clinical methods used for estimation of fetal birth weight was found to be by far simple and reliable methods in estimation of fetal birth weight than Ultrasonographic estimation methods and thus holds importance in day to day practice especially in countries like us where still a large group of population resides in rural areas.

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“…60 Moreover, studies comparing clinical and US measurements found neither method superior, US proving more accurate only in the low birth weight range. 61 A recent study also showed that the positive predictive value of US in assessing birth weights above the 95th percentile in women with varying degrees of glucose intolerance is only 50%. 62 In another recent study, Pates et al 63 found that US estimates of fetal weight of 4000 g or more, based on fetal abdominal circumference, biparietal diameter, head circumference and femur length, within a week of delivery and a higher than normal amniotic fluid index in combination with clinical risk factors (maternal parity, BMI and diabetes) improved the prediction of macrosomia from 61% to 71%.…”

Section: Obstetric Managementmentioning

confidence: 99%