Pathology of the human placenta

Fox, H.

doi:10.1016/0143-4004(92)90013-j

Cited by 39 publications

(72 citation statements)

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“…Placenta hypoplasia was defined as an absolute too low placenta weight <10th percentile and/or a too low placenta/birth weight ratio [18]. We defined placental bed pathology for preterm cases as any infarctions found at placental histology and for term cases as extensive infarction that affected >10% of the placental area [19]. Cause of death ''placental bed pathology'' was allocated if in our opinion the percentage of infarcted parenchyma in relation to the weight of the placenta was severe enough to cause death.…”

Section: Methodsmentioning

confidence: 99%

A Placental Cause of Intra-uterine Fetal Death Depends on the Perinatal Mortality Classification System Used

et al. 2008

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A placental cause of intra-uterine fetal death depends on the perinatal mortality classification system used Korteweg, F.J.; Gordijn, S.J.; Timmer, Albertus; Holm, J.P.; Ravise, J.M.; Erwich, Jan Jaap H. M. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract Different classification systems for the cause of intra-uterine fetal death (IUFD) are used internationally. About two thirds of these deaths are reported as unexplained and placental causes are often not addressed. Differences between systems could have consequences for the validity of vital statistics, for targeting preventive strategies and for counselling parents on recurrence risks. Our objective was to compare use of the Tulip classification with other currently used classification systems for causes of IUFD. We selected the extended Wigglesworth classification, modified Aberdeen and the classifications by Hey, Hovatta, de Galan-Roosen and Morrison. We also selected the ReCoDe system for relevant conditions, comparable to contributing factors in the Tulip classification. Panel classification for 485 IUFD cases in the different systems was performed by assessors after individual investigation of structured patient information. Distribution of cases into cause of death groups for the different systems varied, most of all for the placental and unknown groups. Systems with a high percentage of cases with an unknown cause of death and death groups consisting of clinical manifestations only are not discriminatory. Our largest cause of death group was placental pathology and classification systems without placental cause of death groups or minimal subdivision of this group are not useful in modern perinatal audit as loss of information occurs. The most frequent contributing factor was growth restriction. This illustrates the vital role of the placenta in determination of optimal fetal development. In the Tulip classification, mother, fetus and placenta are addressed together. The system has a clear defined subclassification of the placenta group, a low percentage of unknown causes and is easily applied by a multidisciplinary team. A useful classification aids future research into placental causes of IUFD.

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Section: Methodsmentioning

confidence: 99%

A Placental Cause of Intra-uterine Fetal Death Depends on the Perinatal Mortality Classification System Used

et al. 2008

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“…12,13 The reported incidence of bilobed placenta varies widely in the literature, ranging from 0.04% to 4.2%. 6,5 In the Collaborative Perinatal Study, Naeye 14 examined more than 46,000 placentas and found 1.7% to be bilobed. In two thirds of cases, a velamentous cord insertion was identified (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…5 The risk of retained placenta is increased. 6 An amnioscope is a simple tube endoscope that is used for the direct visualization of the amniotic membranes. In their study evaluating postdatism, Browne and Brennan 15 identified 2 cases of vasa previa using amnioscopy.…”

Section: Discussionmentioning

confidence: 99%

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Vasa Previa Diagnosis and Management

Lijoi

Brady²

2003

The Journal of the American Board of Family Medicine

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Introduction:Vasa previa is an uncommon obstetrical complication that poses a high risk of fetal demise if not recognized before rupture of membranes. It is vital that providers recognize risk factors for vasa previa and diagnose this condition before the onset of labor so that fetal shock or demise is prevented.Methods: We report a patient with a bilobed placenta and perinatal hemorrhage caused by vasa previa that was not detected with antepartum ultrasound. A review of the literature published between January 1965 and August 2002 was conducted using a MEDLINE-assisted search using the key words "vasa previa," "bilobed placenta," and "succenturiate.

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“…These vessels are surrounded by embryonic connective tissue called mucoid connective tissue otherwise known as Wharton's jelly and the umbilical cord is inserted on the placenta in different modes. The cord is more eccentrically situated on the chorionic plate but it may vary from a midcentral or central insertion to a marginal attachment [9]. A marginally inserted umbilical cord results in a battledore placenta [10].…”

Section: Introductionmentioning

confidence: 99%