INTERNATIONAL JOURNAL OF CLINICAL AND MEDICAL CASES (ISSN:2517-7346)

With the purpose of to describe the vessels of the placental villi in hemorrhage condition during chronic hypertension associated to obesity two placentas were analyzed with light microscopy. Stem villi were observed with closed or opened vessels in their trajectory. Numerous intermediate villi were noted with dilated vessels that refill the stromal region. Remarkable changes as picnotic nucleus, nuclear disintegration, thinness and interruption of the syncytium were found. The vessels have exploited in the stromal region. Syncytium very thin surround to numerous erythrocytes. A disorganized structure of the stem villi with frequency can be seen. These villi have a great deal coverture of fibrinoid deposition and others are observed buried by fibrinoid. Chronic hypertension has provoked intra villous hemorrhage in the placental villi which could to put in danger the fetal good development with decreased fetal nutrition.

Placental hemorrhagic; Villi; Obesity; Chronic hypertension

Intravillous hemorrhage in placental villi has been seen in preterm placentas associated to suspected abruption often accompanying sudden anoxia [1]. This event provokes early mortality in preterm infants and is likely due to sudden ischemia, hemodynamic shifts within the villous circulation, leading to the rupture of capillary walls and vascular instability in very low birth weight infants [2].

This feto-maternal hemorrhage has been classified as fetomaternal hemorrhage of small vessel type and fetomaternal hemorrhage of large vessel type [3]. Accumulations of clotted blood in the inter villous space or intervillous thrombus represent foci of fetomaternal hemorrhage clinically important when are multiple or very large [4]. These represent the first type.

Rupture of large fetal vessels in the chronic plate or larger stem villi provoke a massive subchorial thrombosis that elevates the chronic plate while displacing the under lying villous parenchyma downward and is associated with preterm intrauterine fetal death [5]. This event is a catastrophic and random contingency representing the second type. If well it has been described that “whether stromal hemorrhage is seen in situations other that abruption is not clear” [3]. Nevertheless, we have observed the rupture of vessels in the stromal region of the placental villi in patients with chronic hypertension. To describe the placental villi with the vessels in hemorrhagic condition.

The conditions leading to friability of terminal villi such as increased syncytial knotting in preterm infants and delayed villous maturation in term infants may increase the risk of villous rupture [3].

The fetus often bleeds into the maternal circulation for many reasons as trauma to the placenta, therapeutic abortion, caesarean section, automobile accidents, fetal kicking, turning or punching. Factors that can provoke exsanguination and may cause severe fetal anaemia, mortality and morbidity [6].

Is our objective to describe the vessels of the placental villi in hemorrhagic condition during chronic hypertension associated to obesity?

Two placentas obtained by cesarean of woman pregnancy at 32 (P1) and 39 (P2) years old were processed by light microscopy and H&E stain. Patient P1 with history of two cesarean, one abortion and 117 kg of weight while that patient P2 had 67kg of weight without that history. Both patients without pregnancy induced hypertension have given their informed consent for participation in the research study and there is not conflict of interest in this work. Five fragments of placenta were selected by each placenta and compared with normal placenta as control. Four slides prepared by each fragment and 20 slides by placenta were examined. In this work observations were done in hemorrhagic zones of placental villi whose patients had hypertension considered ≥ 140/190 mmHg on two occasions that presents before 20 weeks gestation and not come back to normal within 12 weeks of delivery.

Stem villi were observed with closed vessels, associated with degenerative villi which contain clear regions in their stromal region (Figure 1). In others the stem villi presented an opened vessels and another closed vessel in their trajectory (Figure 2). Numerous placental villi as mature intermediate villi were noted with dilated vessels that refill the stromal region (Figure 3).

The syncytium suffers remarkable changes: picnotic nucleus, nuclear disintegration, thinness and interruption. Many of these vessels have exploited in the stromal region (Figure 4). If they are found in the stromal surface the erythrocytes are expulsed to the intervillous space (Figure 5).

Increased numbers of villi are seen shaped by syncytium very thin which surround to numerous erythrocytes. With frequency a disorganized structure of the stem villi can to be observed which contain dilated vessels (Figure 6). These stem villi in some cases have a great deal coverture of fibrinoid deposition and in other cases the placental villi is seen buried by fibrinoid (Figure 7). X-cells can be seen in stem villi which are associated with fibrinoid deposition (Figure 8).