Fetal umbilical artery flow velocity waveforms and placental resistance: pathological correlation
Placental microvascular anatomy was correlated with antenatal assessment of the umbilical circulation in 106 patients to further validate the measurement of the A/B ratio (the ratio of peak systolic to least diastolic flow velocity) of the umbilical artery flow velocity time wave‐forms as an index o...
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| Veröffentlicht in: | BJOG : an international journal of obstetrics and gynaecology 1985-01, Vol.92 (1), p.31-38 |
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| container_title | BJOG : an international journal of obstetrics and gynaecology |
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| creator | GILES, WARWICK B. TRUDINGER, BRIAN J. BAIRD, PHILLIP J. |
| description | Placental microvascular anatomy was correlated with antenatal assessment of the umbilical circulation in 106 patients to further validate the measurement of the A/B ratio (the ratio of peak systolic to least diastolic flow velocity) of the umbilical artery flow velocity time wave‐forms as an index of blood flow resistance. Three groups of patients were studied: a normal group of 38 uncomplicated pregnancies, a control group of 33 potentially ‘at risk’ pregnancies with a normal A/B ratio matched by risk factors and gestation with the third group of 35 pregnancies with a high A/B ratio. Placental arterial resistance was quantitated by counting the number of small muscular arteries ( |
| doi_str_mv | 10.1111/j.1471-0528.1985.tb01045.x |
| format | Article |
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Three groups of patients were studied: a normal group of 38 uncomplicated pregnancies, a control group of 33 potentially ‘at risk’ pregnancies with a normal A/B ratio matched by risk factors and gestation with the third group of 35 pregnancies with a high A/B ratio. Placental arterial resistance was quantitated by counting the number of small muscular arteries (<90 μm diameter) in the tertiary stem villi in a standard microscopic field (mean 18·5 fields/placenta). The modal small arterial vessel count was shown to be significantly less in the group with a high fetal risk and a high A/B ratio (1–2 arteries/field) than in both the normal and control groups (7–8 arteries/field). The tertiary villus count did not vary between groups. Antenatal studies of umbilical artery flow velocity waveforms with Doppler ultrasound identify a specific microvascular lesion in the placenta characterized by obliteration of small muscular arteries in the tertiary stem villi.</description><identifier>ISSN: 1470-0328</identifier><identifier>ISSN: 0306-5456</identifier><identifier>EISSN: 1471-0528</identifier><identifier>EISSN: 1365-215X</identifier><identifier>DOI: 10.1111/j.1471-0528.1985.tb01045.x</identifier><identifier>PMID: 3966988</identifier><identifier>CODEN: BJOGAS</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Arteries - pathology ; Biological and medical sciences ; Blood Flow Velocity ; Diseases of mother, fetus and pregnancy ; Female ; Gynecology. Andrology. Obstetrics ; Humans ; Medical sciences ; Placenta - blood supply ; Placenta - pathology ; Pregnancy ; Pregnancy. Fetus. 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Three groups of patients were studied: a normal group of 38 uncomplicated pregnancies, a control group of 33 potentially ‘at risk’ pregnancies with a normal A/B ratio matched by risk factors and gestation with the third group of 35 pregnancies with a high A/B ratio. Placental arterial resistance was quantitated by counting the number of small muscular arteries (<90 μm diameter) in the tertiary stem villi in a standard microscopic field (mean 18·5 fields/placenta). The modal small arterial vessel count was shown to be significantly less in the group with a high fetal risk and a high A/B ratio (1–2 arteries/field) than in both the normal and control groups (7–8 arteries/field). The tertiary villus count did not vary between groups. Antenatal studies of umbilical artery flow velocity waveforms with Doppler ultrasound identify a specific microvascular lesion in the placenta characterized by obliteration of small muscular arteries in the tertiary stem villi.</description><subject>Arteries - pathology</subject><subject>Biological and medical sciences</subject><subject>Blood Flow Velocity</subject><subject>Diseases of mother, fetus and pregnancy</subject><subject>Female</subject><subject>Gynecology. Andrology. Obstetrics</subject><subject>Humans</subject><subject>Medical sciences</subject><subject>Placenta - blood supply</subject><subject>Placenta - pathology</subject><subject>Pregnancy</subject><subject>Pregnancy. Fetus. Placenta</subject><subject>Regional Blood Flow</subject><subject>Umbilical Arteries - physiology</subject><subject>Vascular Resistance</subject><issn>1470-0328</issn><issn>0306-5456</issn><issn>1471-0528</issn><issn>1365-215X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1985</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqVkEtP3DAUha2qiGd_AlKEqu4m-BEnNlIXFBVahMQG1pbjXINHTjzYGYb593WYaPb1xlc659x79CF0QXBJ8rtclqRqyAJzKkoiBS_HFhNc8fLjCzreS18_Z7zAjIojdJLSEmNSU8wO0SGTdS2FOEb6Fkbti3XfOu9MnnQcIW4L68OmeAcfjBu3xUa_gw2xT4UeumLltYFhikVILo16MHBVrPT4Gnx4-dxiQozg9ejCcIYOrPYJvs3_KXq-_f1082fx8Hj39-b6YWGYzI2hayRnEgRppa1tlbtW2lrKDdeSUsloSxlpmo53RGRL0wpbCaJxx4C3tGKn6Mdu7yqGtzWkUfUuGfBeDxDWSTVcssyIZePVzmhiSCmCVavoeh23imA18VVLNUFUE0Q18VUzX_WRw-fzlXXbQ7ePzkCz_n3WdcogbMxwXNrbJMW0ZjLbfu5sG-dh-x8F1K_7R0bYP9pDmLI</recordid><startdate>198501</startdate><enddate>198501</enddate><creator>GILES, WARWICK B.</creator><creator>TRUDINGER, BRIAN J.</creator><creator>BAIRD, PHILLIP J.</creator><general>Blackwell Publishing Ltd</general><general>Blackwell</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>198501</creationdate><title>Fetal umbilical artery flow velocity waveforms and placental resistance: pathological correlation</title><author>GILES, WARWICK B. ; TRUDINGER, BRIAN J. ; BAIRD, PHILLIP J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3971-ed79539e81b9f6f40014aff25c5a922932b23177d5d18b9f7b8f481a0d3e5b243</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1985</creationdate><topic>Arteries - pathology</topic><topic>Biological and medical sciences</topic><topic>Blood Flow Velocity</topic><topic>Diseases of mother, fetus and pregnancy</topic><topic>Female</topic><topic>Gynecology. Andrology. Obstetrics</topic><topic>Humans</topic><topic>Medical sciences</topic><topic>Placenta - blood supply</topic><topic>Placenta - pathology</topic><topic>Pregnancy</topic><topic>Pregnancy. Fetus. Placenta</topic><topic>Regional Blood Flow</topic><topic>Umbilical Arteries - physiology</topic><topic>Vascular Resistance</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>GILES, WARWICK B.</creatorcontrib><creatorcontrib>TRUDINGER, BRIAN J.</creatorcontrib><creatorcontrib>BAIRD, PHILLIP J.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>BJOG : an international journal of obstetrics and gynaecology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>GILES, WARWICK B.</au><au>TRUDINGER, BRIAN J.</au><au>BAIRD, PHILLIP J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fetal umbilical artery flow velocity waveforms and placental resistance: pathological correlation</atitle><jtitle>BJOG : an international journal of obstetrics and gynaecology</jtitle><addtitle>Br J Obstet Gynaecol</addtitle><date>1985-01</date><risdate>1985</risdate><volume>92</volume><issue>1</issue><spage>31</spage><epage>38</epage><pages>31-38</pages><issn>1470-0328</issn><issn>0306-5456</issn><eissn>1471-0528</eissn><eissn>1365-215X</eissn><coden>BJOGAS</coden><abstract>Placental microvascular anatomy was correlated with antenatal assessment of the umbilical circulation in 106 patients to further validate the measurement of the A/B ratio (the ratio of peak systolic to least diastolic flow velocity) of the umbilical artery flow velocity time wave‐forms as an index of blood flow resistance. Three groups of patients were studied: a normal group of 38 uncomplicated pregnancies, a control group of 33 potentially ‘at risk’ pregnancies with a normal A/B ratio matched by risk factors and gestation with the third group of 35 pregnancies with a high A/B ratio. Placental arterial resistance was quantitated by counting the number of small muscular arteries (<90 μm diameter) in the tertiary stem villi in a standard microscopic field (mean 18·5 fields/placenta). The modal small arterial vessel count was shown to be significantly less in the group with a high fetal risk and a high A/B ratio (1–2 arteries/field) than in both the normal and control groups (7–8 arteries/field). The tertiary villus count did not vary between groups. Antenatal studies of umbilical artery flow velocity waveforms with Doppler ultrasound identify a specific microvascular lesion in the placenta characterized by obliteration of small muscular arteries in the tertiary stem villi.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>3966988</pmid><doi>10.1111/j.1471-0528.1985.tb01045.x</doi><tpages>8</tpages></addata></record> |
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| ispartof | BJOG : an international journal of obstetrics and gynaecology, 1985-01, Vol.92 (1), p.31-38 |
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| language | eng |
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| source | MEDLINE; Wiley Online Library All Journals; Alma/SFX Local Collection |
| subjects | Arteries - pathology Biological and medical sciences Blood Flow Velocity Diseases of mother, fetus and pregnancy Female Gynecology. Andrology. Obstetrics Humans Medical sciences Placenta - blood supply Placenta - pathology Pregnancy Pregnancy. Fetus. Placenta Regional Blood Flow Umbilical Arteries - physiology Vascular Resistance |
| title | Fetal umbilical artery flow velocity waveforms and placental resistance: pathological correlation |
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