scholarly journals Postpartum Period in Women with Covid-19: Cytokine Storm and Coagulation System Changes, Points of View

2021 ◽  
Vol 4 (5) ◽  
Author(s):  
Maasoumeh Saleh
2018 ◽  
Vol 24 (5) ◽  
pp. 508-514
Author(s):  
M. L. Chukhlovina ◽  
S. E. Medvedev

Nowadays, the risk factors, improvement of diagnosis and treatment of cardiovascular diseases are of particular interest. Arterial hypertension (HTN) is known to contribute to cardiovascular disease and to be a risk factor for cerebrovascular diseases. HTN during pregnancy and in the postpartum period draws particular attention. Throughout the world, hypertension during pregnancy remains the leading cause of maternal and child morbidity and mortality. To our knowledge, only a few works studied neurological disorders associated with HTN in pregnant women. In this connection, the purpose of our review was to analyze the role of HTN in the development of cerebrovascular diseases in pregnancy. Pregnant women with HTN show 5,2-fold higher frequency of strokes than normotensive women. The risk of stroke increases from the third trimester of pregnancy to six weeks of the postpartum period. The pregnant women with HTN develop changes in the coagulation system leading to the formation of arterial and venous thromboses in the cerebrovascular circulation. The presence of preeclampsia (PE) is associated with the 7–9-fold increase in the risk of stroke. Endothelial dysfunction is one of the leading links in the pathogenesis of PE. The PE is associated with an increase in anti-angiogenic factors and a decrease in angiogenic factors. Thus, the measures preventing the development of cerebrovascular diseases in pregnant women with HTN, include identification of prehypertension in women of childbearing age, the improvement of HTB management strategies, and an interdisciplinary approach to the diagnostic and treatment process involving the obstetrician, the therapist, the cardiologist and the neurologist.


2013 ◽  
Vol 74 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Elaine Cole ◽  
Ross Davenport ◽  
Henry De-Ath ◽  
Joanna Manson ◽  
Thomas Brockamp ◽  
...  

2012 ◽  
Vol 32 (01) ◽  
pp. 15-21 ◽  
Author(s):  
H. Rott

SummaryAbout 3.2 million women in Germany are between 14 and 19 years old representing about 19% of women. 55% of them use combined oral contraception (COC). The risk of venous thromboembolism (VTE) during the use of COC is increased 2–6 times. For thrombophilic patients depending on the kind of thrombophilic defect it is much higher. Pregnancy and postpartum period lead to a much higher increase of VTE than any COC use at all, both in women with and without thrombophilic defect. VTE risk in COC is highly dependent on the content of ethinylestradiol (EE) and the kind of progestagen used in COC. Progestagen-only contraceptives (POC) do not increase the VTE risk, since they do not activate the coagulation system. Conclusion: It is not justified to withhold any hormonal contraception to thrombophilic women, especially considering the much higher VTE risk in (maybe unintended) pregnancy. Adolescents thrombophilic women should rather be informed about the opportunity to use POC.


Author(s):  
T. Yanaka ◽  
K. Shirota

It is significant to note field aberrations (chromatic field aberration, coma, astigmatism and blurring due to curvature of field, defined by Glaser's aberration theory relative to the Blenden Freien System) of the objective lens in connection with the following three points of view; field aberrations increase as the resolution of the axial point improves by increasing the lens excitation (k2) and decreasing the half width value (d) of the axial lens field distribution; when one or all of the imaging lenses have axial imperfections such as beam deflection in image space by the asymmetrical magnetic leakage flux, the apparent axial point has field aberrations which prevent the theoretical resolution limit from being obtained.


Author(s):  
L.R. Wallenberg ◽  
J.-O. Bovin ◽  
G. Schmid

Metallic clusters are interesting from various points of view, e.g. as a mean of spreading expensive catalysts on a support, or following heterogeneous and homogeneous catalytic events. It is also possible to study nucleation and growth mechanisms for crystals with the cluster as known starting point.Gold-clusters containing 55 atoms were manufactured by reducing (C6H5)3PAuCl with B2H6 in benzene. The chemical composition was found to be Au9.2[P(C6H5)3]2Cl. Molecular-weight determination by means of an ultracentrifuge gave the formula Au55[P(C6H5)3]Cl6 A model was proposed from Mössbauer spectra by Schmid et al. with cubic close-packing of the 55 gold atoms in a cubeoctahedron as shown in Fig 1. The cluster is almost completely isolated from the surroundings by the twelve triphenylphosphane groups situated in each corner, and the chlorine atoms on the centre of the 3x3 square surfaces. This gives four groups of gold atoms, depending on the different types of surrounding.


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