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Clinical and ultrasonic estimation of fetal weight
Several clinical situations occur in obstetrics where it is useful to make an accurate assessment of fetal weight prior to delivery. A foreknowledge of the mass of the fetus can influence management in circumstances complicated by, for example, a previous caesarean section, a breech presentation, a...
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| Format: | Thesis |
| Language: | English |
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Department of Obstetrics and Gynaecology
2017
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| _version_ | 1867613284532748288 |
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| access_status_str | Open Access |
| author | Brink, Derek Montagu |
| author2 | De Jong, Peter |
| author_browse | Brink, Derek Montagu De Jong, Peter |
| author_facet | De Jong, Peter Brink, Derek Montagu |
| author_sort | Brink, Derek Montagu |
| collection | Thesis |
| description | Several clinical situations occur in obstetrics where it is useful to make an accurate assessment of fetal weight prior to delivery. A foreknowledge of the mass of the fetus can influence management in circumstances complicated by, for example, a previous caesarean section, a breech presentation, a compromised fetus of borderline viability and a diabetic pregnancy at term. Researchers have attempted to estimate fetal weight by assaying oestriol, human placental lactogen, and pregnanediol. These parameters have been found to be of limited value because of the indirect measurement of fetal mass. Since the introduction of ultrasound scanning techniques to obstetrics in the mid- 1960's, it has become possible to visualise the fetus and to make direct measurements of fetal anatomy. By using ultrasound, workers have tried to predict fetal weight by measuring fetal heart volume, hourly urine production, trunk diameter, circumference and placental volume. At present various combinations of head circumference (HC), biparietal diameter (BPD), femur length (FL), and abdominal circumference (AC) are the most commonly used measurements which, when used in different formulas and read off tables estimate fetal weight. Recently the gestational age (GA) has been incorporated into formulas specifically applied to small for gestational age (SGA), appropriate for gestational age (AGA), and large for gestational age (LGA) fetuses. A sonographic estimation of fetal weight based on a model of fetal volume has also been developed. It was generally believed that with the refining of ultrasonic estimation of fetal weight an accurate assessment of fetal mass could, at last, be made. Some investigators believe that the ultrasound estimation of fetal mass is more accurate than clinical assessment. In contrast other workers have shown that the accuracy of clinical examination is comparable to ultrasound determination in estimating fetal weight. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/26563 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:41.762Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Department of Obstetrics and Gynaecology |
| publisherStr | Department of Obstetrics and Gynaecology |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/26563 Clinical and ultrasonic estimation of fetal weight Brink, Derek Montagu De Jong, Peter Lindow, Stephen Obstetrics and Gynaecology Several clinical situations occur in obstetrics where it is useful to make an accurate assessment of fetal weight prior to delivery. A foreknowledge of the mass of the fetus can influence management in circumstances complicated by, for example, a previous caesarean section, a breech presentation, a compromised fetus of borderline viability and a diabetic pregnancy at term. Researchers have attempted to estimate fetal weight by assaying oestriol, human placental lactogen, and pregnanediol. These parameters have been found to be of limited value because of the indirect measurement of fetal mass. Since the introduction of ultrasound scanning techniques to obstetrics in the mid- 1960's, it has become possible to visualise the fetus and to make direct measurements of fetal anatomy. By using ultrasound, workers have tried to predict fetal weight by measuring fetal heart volume, hourly urine production, trunk diameter, circumference and placental volume. At present various combinations of head circumference (HC), biparietal diameter (BPD), femur length (FL), and abdominal circumference (AC) are the most commonly used measurements which, when used in different formulas and read off tables estimate fetal weight. Recently the gestational age (GA) has been incorporated into formulas specifically applied to small for gestational age (SGA), appropriate for gestational age (AGA), and large for gestational age (LGA) fetuses. A sonographic estimation of fetal weight based on a model of fetal volume has also been developed. It was generally believed that with the refining of ultrasonic estimation of fetal weight an accurate assessment of fetal mass could, at last, be made. Some investigators believe that the ultrasound estimation of fetal mass is more accurate than clinical assessment. In contrast other workers have shown that the accuracy of clinical examination is comparable to ultrasound determination in estimating fetal weight. 2017-12-12T10:57:04Z 2017-12-12T10:57:04Z 1994 Master Thesis Masters MMed http://hdl.handle.net/11427/26563 eng application/pdf Department of Obstetrics and Gynaecology Faculty of Health Sciences University of Cape Town |
| spellingShingle | Obstetrics and Gynaecology Brink, Derek Montagu Clinical and ultrasonic estimation of fetal weight |
| thesis_degree_str | Master's |
| title | Clinical and ultrasonic estimation of fetal weight |
| title_full | Clinical and ultrasonic estimation of fetal weight |
| title_fullStr | Clinical and ultrasonic estimation of fetal weight |
| title_full_unstemmed | Clinical and ultrasonic estimation of fetal weight |
| title_short | Clinical and ultrasonic estimation of fetal weight |
| title_sort | clinical and ultrasonic estimation of fetal weight |
| topic | Obstetrics and Gynaecology |
| url | http://hdl.handle.net/11427/26563 |
| work_keys_str_mv | AT brinkderekmontagu clinicalandultrasonicestimationoffetalweight |