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Some observations on Spanner's conception of the placental vascular arrangement and the maternal blood circulation through it

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ElShahedA_1946redux.pdf (9.122Mb)
Date
1946
Author
El Shahed, A.
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Abstract
 
 
While the development of the vascular system in other organs is regulated by functional influences and hereditary factors; in the case of the placenta the site of implantation in the uterus and the characteristics of the maternal circulation also play an important role. The maternal and foetal blood circulatory paths within the placenta are regarded from the haemodynamic point of view as most complicated because the placental structure is looked upon as being most complex. Many contradicting views are held in that respect and many theories are formulated regarding the placental structure and maternal blood circulation through it. It is clear that in order to understand these questions the placental connections with the uterus and foetus must be studied both with the naked eye and microscope. The human placenta according to Grosser is described as a placenta haemochorialis, thereby meaning that the foetal chorion is in direct relationship with the maternal blood. This fact underlies many risks that the pregnant, parturient, and puerperal woman undergoes and it follows that a sound knowledge of the vascular conditions in the pregnant uterus underlies the pathology of reproduction. For instance: is the mechanism of antepartum and postpartum haemorrhage really understood? or the factors that are associated with embolus complicating child birth known? - advancement in obstetrics depends to some extent on the complete knowledge of this subject. In 1935 Rudolf Spanner of Kiel brought forward a new conception formulating a new idea not only of the structure of the placenta but of the circulation of the maternal blood through that organ and back to the uterine veins. His work depended on injection experiments on the pregnant uterus and placenta. In the present scope of this work Spanner's work on the subject has been studied and experiments done to compare with his results.
 
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http://hdl.handle.net/1842/33995
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  • Edinburgh Medical School thesis and dissertation collection

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