Abdominal pregnancy: a perfusion confusion?

Collins, S.L.; Grant, D.; Black, R.S.; Vellayan, M.; Impey, L.

doi:10.1016/j.placenta.2011.07.032

Cited by 27Pregnancy and preeclampsia studiesMaternal and fetal healthcareEctopic Pregnancy Diagnosis and Management

Abdominal pregnancy: a perfusion confusion?

Collins, S.L., Grant, D., Black, R.S., Vellayan, M., Impey, L.·2011·Placenta

DOI 10.1016/j.placenta.2011.07.032

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Abstract

Background The uteroplacental blood supply is usually portrayed as a 'series' circuit. Differences seen in the uterine artery (UA) waveform in pregnancies destined to develop pre-eclampsia are often attributed to back pressure effects from the downstream flow through the spiral arteries of the placental bed.Case A third trimester abdominal pregnancy was successfully delivered by laparotomy at 30 weeks gestation. The UA waveforms of were recorded at 27 weeks. Both were 'normal' for the gestation, despite limited blood supply from the right uterine and the left not supplying the placenta at all.Conclusion In the absence of pre-eclampsia, UAs can convert to a 'low resistance' waveform even when not directly connected to the placental bed. This case report adds to the evidence against the 'cause and effect' mechanism often used to explain the correlation between trophoblastic invasion and the UA waveform. Both may independently develop in response to a common underlying mechanism.

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Authors: Collins, S. L., Grant, D., Black, R. S., Vellayan, M., & Impey, L.
Affiliations: John Radcliffe Hospital (GB)
University of Oxford (GB)
Gloucestershire Royal Hospital (GB)
Corresponding author: Collins, S.L.
ORCID: Collins, S.L.
Impey, L.
Venue: Placenta
Publisher: Elsevier BV
Published: 2011-10
Volume: 32
Issue: 10
Pages: 793-795
ISSN: 0143-4004 (ISSN-L)
DOI: 10.1016/j.placenta.2011.07.032
OpenAlex: W2056618230
Cited by: 27
References: 27
Citations by year: 2025: 1 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 2 · 2020: 2 · 2019: 4 · 2018: 2 · 2017: 3 · 2016: 1 · 2015: 2 · 2013: 2 · 2012: 2
FWCI: 2.47
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
www.elsevier.com/legal/tdmrep-license (tdm)
Locations: Placenta (publishedVersion)
PubMed (publishedVersion)
Funders: National Institute for Health Research
NIHR Oxford Biomedical Research Centre
Topics: Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Maternal and fetal healthcare
Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Ectopic Pregnancy Diagnosis and Management
Keywords: abdominal pregnancy, preeclampsia, spiral arteries, trophoblast invasion, uteroplacental blood flow, third trimester
MeSH terms: Adult, Female, Humans, Infant, Newborn, Placenta, Pregnancy, Pregnancy, Abdominal, Ultrasonography, Doppler, Uterine Artery

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Abdominal pregnancy: a perfusion confusion?

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