Near death 18 weeks preeclampsia in molar pregnancy

Authors present a case of a molar pregnancy of 18 weeks with preeclampsia complicated with acute pulmonary oedema. A condition carrying a significant risk to mother, therefore, raising an important issue on preeclampsia symptoms on pregnancies before 20 weeks. A 31-year-old woman gravida 2, parity 1 presented with dyspnea at 18 weeks' gestation. Blood pressure was very high (180/110 mmHg) and there was markedly proteinuria (+4). She had severe dyspnea and her oxygen saturation level was 75%. Her chest X-ray graph showed massive acute pulmonary oedema. Ultrasonography shows endometrial cavity containing multiple small cystic spaces, creating a characteristic “snowstorm” and “cluster of grapes” appearance. Markedly elevated quantitative human chorionic gonadotropin (250.000 mIU/mL). The acute pulmonary oedema has been managed by diuretics (Furosemide) and oxygen. There was no cardiac abnormalities in the tranthoracic echocardiogram. Authors administered antihypertensive therapy (intravenous nicardipine and lmethyldopa in per os), and magnesium sulfate in prevention of eclamptic seizures. The pregnancy was terminated by uterine evacuation under oxytocin infusion by manual ultrasound aspiration. She was followed up intensive care unit for two days. Causes of secondary high blood pressure had been eliminated. The patient's blood pressure rapidly normalized two days after delivery. Dyspnea disappeared one day later. Pathologic and cytogenetic analyses revealed a complete hydatiform mole. Two days after delivery; the serum β-hCG level was 99000 mlU/ml. A control ultrasonography shows an empty uterus. Hydatidiform mole is classified into 2 different subtypes, complete hydatidiform mole and partial or incomplete hydatidiform mole development of preeclampsia prior to 20 weeks of gestation should prompt a clinical evaluation to exclude the possibility of an underlying hydatidiform molar pregnancy. Ultrasonography and level of serum BHCG are the initial investigation of choice for the detection of hydatidiform mole. Aspiration is the treatment of reference

INFLUENCE OF PROCESSING PARAMETERS ON THE ELECTRICAL PROPERTIES OF Zn1-x CoxO CERAMICS (0 ⩽ x ⩽ 0.10)

L'influence de la concentration en cobalt et de la durée du frittage sur la conductivité électrique de céramiques de la solution solide Zn1-xCoxO (0 ⩽ x ⩽ 0.10), mesurée entre 400 et 1300 K, a été étudiée. L'interprétation des résultats obtenus associe la dissolution du cobalt dans la structure wurtzite de l'oxyde de zinc à la formation de deux niveaux d'énergie dans la bande interdite.The electrical conductivity of Zn1-xCoxO solid solution has been studied as a function of composition (0 ⩽ x ⩽ 0.10) and of sintering time. The behavior observed is probably due to the appearance of two energy levels in the forbidden band

Effect of an organic additive on the rheology of an aluminous cement paste and consequences on the densification of the hardened material

The material used in the present work is Secar 71 (Lafarge) mixed with water containing an organic additive (acetic acid noted HOAc). The rheological behavior of these pastes is studied. The best dispersion is obtained when the mass content of the additive with respect to the cement is equal to 0.5%. The microstructural characterizations of samples aged 4 days at 20$^{\circ}$C and 95 % relative humidity reveal a significant increase in the density and a reduction in porosity for very small percentages of additive. The remarkable effect of the acetic acid on the microstructure of hardened material is correlated with its good dispersing action

Diagramme polythermique du système H2_2O-(NH4_4)2_2HPO4_4-(NH4_4)2_2SO4_4

The polythermal diagram of the ternary system H$_2$O-(NH$_4$)$_2$HPO$_4$-(NH$_4$)$_2$SO$_4$ has been completed with two isotherms obtained at –15°C and 40°C by conductimetric analysis.One eutectic and one transitional transformation have been observed at –26°C and 6°C respectively

Synthesis, sintering and electrical properties of P-doped Bi₄V₂O₁₁ ceramics

Partial substitution of vanadium by phosphorus in Bi4V2O11, compound belonging to the Aurivillius family, leads to the formation of Bi4V2−xPxO11 solid solution with an orthorhombic symmetry and does not stabilize the γ-high temperature form down to room temperature. X-ray diffraction, density measurements, thermal analysis and IR spectroscopy have been used to confirm the formation of the solid solution. The influence of sintering temperature on the microstructure and the grains size of the samples with different compositions was investigated by the scanning electron microscopy (SEM). The evolution of the electrical conductivity with phosphorus ratio has been investigated by impedance spectroscopy and correlated to the structural transformations

Effect of Niobium doping on structural, thermal, sintering and electrical properties of Bi4V1.8Cu0.2O10.7

Doping Bi4V1.8Cu0.2O10.7 with niobium has led to the formation of the Bi4V1.8Cu0.2−xNbxO10.7+3x/2 solid solution. X-ray diffraction and thermal analysis have shown that only the compound with x=0.05 presents a tetragonal symmetry with a γ′ polymorph while the other compositions are of β polymorph. The influence of sintering temperature on the microstructure of the samples was investigated by the scanning electron microscopy (SEM). The ceramics sintered at temperatures higher than 820 °C present micro-craks. The evolution of the electrical conductivity with temperature and the degree of substitution has been investigated by impedance spectroscopy. Among all compositions studied the sample with x=0.05 presents the highest value of the conductivity

Thermal and mechanical properties of cordierite refractory ceramic produced from stevensite-rich clay, kaolin and alumina

International audienc

Mechanical behavior and ultrasonic non-destructive characterization of elastic properties of cordierite-based ceramics

International audienceThe structural and morphological evolutions of cordierite-based ceramics produced from stevensite/andalusite mixture sintered from 1150 to 1350 °C were studied using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The mechanical behavior was investigated by three-point bending and Brazilian tests. The elastic properties were evaluated using ultrasonic non-destructive testing (NDT). XRD results revealed that the main crystalline phase formed at 1300 and 1350 °C was cordierite with traces of mullite. A linear-elastic behavior followed by brittle fracture was observed in three-point bending test with the presence of multiple discontinuities. Flexural and diametral compression strength values of cordierite sintered at 1300 °C were 39.4±4 and 21.8±2 MPa, respectively. The elastic properties such as Young's modulus (38.7–45.1 GPa), shear modulus (17.90–19.42 GPa) and Poisson ratio (0.08–1.6) of cordierite-based ceramics produced at 1350 and 1300 °C were also determined

Synthesis and characterization of ceramic based cordierite from ghassoul, kaolinite and alumina

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