scholarly journals The reason for the closure of the Votall's duct in newborns. Vogt (Fortschr. D. Röntgenstr., 28)

2021 ◽  
Vol 18 (2) ◽  
pp. 110-110
Author(s):  
V. G.
Keyword(s):  
Umbilical Vein ◽  
Circulatory System ◽  
Red Lead

Vogt (Fortschr. D. Rntgenstr., 28) made a number of studies with the infection of the circulatory system in newborns through the umbilical vein. For injection he was served with a mixture of 60.0 red lead, 100.0 water, 20.0 chalk and 20.0 gelatin.

scholarly journals Comparative Anatomical Studies on Ductus Venosus in Fetuses of Domestic Ruminants

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Pamela Bejdić ◽  
Amel Ćutuk ◽  
Amer Alić ◽  
Benjamin Čengić ◽  
Rizah Avdić ◽  
...  
Keyword(s):  
Histological Examination ◽  
Umbilical Vein ◽  
Circulatory System ◽  
Fetal Tissue ◽  
Ductus Venosus ◽  
Elastic Fibers ◽  
Silver Stain ◽  
Tissue Samples ◽  
Domestic Ruminants ◽  
Hematoxylin And Eosin

AbstractThe study has aimed to investigate and determine the anatomical position, shape, size, and histological features of the ductus venosus, and its role as a shunt in the fetal circulatory system in domestic ruminants. The research was conducted on 19 bovine, 11 sheep and 5 goat fetuses, aborted at the late stage of pregnancy or deceased just after delivery. The general anatomy of the ductus venosus was investigated by in-situ dissection of the corrosive cast obtained by injection of 25% solution of Vinylite mass through the umbilical vein. For histological examination, the fetal tissue samples were stained with Hematoxylin and Eosin, Masson’s trichrome, Verhoeff-Van Gieson and Gomori's silver stain. The results showed that ruminant fetal ductus venosus is a curved, trumpet-shaped vessel, situated in the central part of the liver, above the porta hepatis. Its ventral part is constricted in the form of an isthmus, having a prominent lip-like thickening at the junction with the portal sinus. Histological examination showed the dominant presence of collagen and elastic fibers in its tunica media, with thin bands of smooth muscle fibers oriented in a longitudinal and circular direction indicating ability for vasoconstriction and vasodilatation.

scholarly journals Vascular and Blood Compatibility of Engineered Cationic Cellulose Nanocrystals in Cell-Based Assays

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2072
Author(s):  
Alexandre Bernier ◽  
Tanner Tobias ◽  
Hoang Nguyen ◽  
Shreshth Kumar ◽  
Beza Tuga ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Cell Viability ◽  
Cellulose Nanocrystals ◽  
Blood Compatibility ◽  
Biological Activities ◽  
Umbilical Vein ◽  
Circulatory System ◽  
Dependent Manner ◽  
Umbilical Vein Endothelial Cells ◽  
The Impact

An emerging interest regarding nanoparticles (NPs) concerns their potential immunomodulatory and pro-inflammatory activities, as well as their impact in the circulatory system. These biological activities of NPs can be related to the intensity and type of the responses, which can raise concerns about adverse side effects and limit the biomedical applicability of these nanomaterials. Therefore, the purpose of this study was to investigate the impact of a library of cationic cellulose nanocrystals (CNCs) in the human blood and endothelial cells using cell-based assays. First, we evaluated whether the cationic CNCs would cause hemolysis and aggregation or alteration on the morphology of red blood cells (RBC). We observed that although these nanomaterials did not alter RBC morphology or cause aggregation, at 24 h exposure, a mild hemolysis was detected mainly with unmodified CNCs. Then, we analyzed the effect of various concentrations of CNCs on the cell viability of human umbilical vein endothelial cells (HUVECs) in a time-dependent manner. None of the cationic CNCs caused a dose-response decrease in the cell viability of HUVEC at 24 h or 48 h of exposure. The findings of this study, together with the immunomodulatory properties of these cationic CNCs previously published, support the development of engineered cationic CNCs for biomedical applications, in particular as vaccine nanoadjuvants.

scholarly journals ARCHITECTONICS OF THE VENOUS BED OF PLACENTA IN WOMEN WITH THE EXACERBATION OF CHRONIC CYTOMEGALOVIRUS INFECTION IN THE FIRST TRIMESTER OF PREGNANCY

2018 ◽  
Vol 1 (67) ◽  
pp. 55-59
Author(s):  
Игорь Гориков ◽  
Igor Gorikov ◽  
Николай Дорофиенко ◽  
Nikolay Dorofienko ◽  
Ольга Кутепова ◽  
...  
Keyword(s):  
Umbilical Vein ◽  
Linseed Oil ◽  
Clinical Signs ◽  
First Trimester ◽  
Outer Diameter ◽  
Cmv Infection ◽  
Threatened Miscarriage ◽  
Red Lead ◽  
First Trimester Of Pregnancy ◽  
Curved Vessels

The aim of the study was to assess the architectonics of the venous bed of the fetus part of placenta from women with the exacerbation of cytomegalovirus (CMV) infection in the first trimester of pregnancy. There were examined 75 patients after the term birth, among them there were 25 seropositive women with the exacerbation of CMV infection in the first trimester of pregnancy without clinical signs of threatened miscarriage; 23 seropositive women with the exacerbation of CMV infection in the first trimester of pregnancy and clinical signs of threatened miscarriage; 27 seronegative women without threatened miscarriage. The architectonics of the venous bed of the fetus part was studied with the pressing of contrast (red lead oxide in the linseed oil) through the umbilical vein into the vessels and placenta cotyledons. The roentgen shots were done at the device RUM-20 M “Sapphire”. During the research of the venous bed of the fetus part of placenta from women with the exacerbation of CMV infection and threatened miscarriage in the first trimester of pregnancy there was identified a velamentous attachment of the umbilical cord with the segmentary narrowing and venous varices as well as with the decrease of the outer diameter of veins of preconfluent zone of the fetus part of the organ. There is an increase in the number of asymmetrically located biconfluent venous vessels, the quantity of marginally located and blindly finishing curved vessels of veins and venous roots, which does not provide the effective blood flow and leads to the ischemia of the peripheral (edge) part of placenta. This reduces the delivery of oxygen and metabolites to the fetus, is accompanied with the development of plethora, stasis, thrombosis and inflammation in veins and arteries, as well as the increase of the risk of partial non-progressive separation of normally placed placenta and its partial intimate attachment to the uterus.

Ultrastructure of the Omphalomesenteric Duct Rest in the Umbilical Cord at Term

1982 ◽  
Vol 40 ◽  
pp. 250-251
Author(s):  
B. A. Clark ◽  
T. Okagaki
Keyword(s):  
Umbilical Cord ◽  
Umbilical Vein ◽  
Meckel’S Diverticulum ◽  
Meckel's Diverticulum ◽  
Columnar Epithelium ◽  
Omphalomesenteric Duct ◽  
Umbilical Arteries

Vestiges of the omphalomesenteric or vitello-intestinal duct and the pathologic implications attributed to these remnants have been treated in great detail by several investigators. Persistence of the omphalomesenteric duct is associated with such conditions as Meckel's diverticulum, umbilical fistula, mucosal polyps, and sinuses or cysts of the umbilicus. Remnants of the duct in the umbilical cord, although infrequent, are located outside of the triangle formed by the two umbilical arteries and the umbilical vein, are usually discontinuous and are often represented by a small lumen lined by cuboidal or columnar epithelium. This study will examine the ultrastructure of these cells.

Ultrastructural observations on the in vitro cytoadherence of Plasmodium falciparum infected red blood cells

1990 ◽  
Vol 48 (3) ◽  
pp. 914-915
Author(s):  
D.J.P. Ferguson ◽  
A.R. Berendt ◽  
J. Tansey ◽  
K. Marsh ◽  
C.I. Newbold
Keyword(s):  
Plasmodium Falciparum ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Umbilical Vein ◽  
Cell Types ◽  
Amelanotic Melanoma ◽  
Cytoplasmic Process ◽  
Umbilical Vein Endothelial Cells

In human malaria, the most serious clinical manifestation is cerebral malaria (CM) due to infection with Plasmodium falciparum. The pathology of CM is thought to relate to the fact that red blood cells containing mature forms of the parasite (PRBC) cytoadhere or sequester to post capillary venules of various tissues including the brain. This in vivo phenomenon has been studied in vitro by examining the cytoadherence of PRBCs to various cell types and purified proteins. To date, three Ijiost receptor molecules have been identified; CD36, ICAM-1 and thrombospondin. The specific changes in the PRBC membrane which mediate cytoadherence are less well understood, but they include the sub-membranous deposition of electron-dense material resulting in surface deformations called knobs. Knobs were thought to be essential for cytoadherence, lput recent work has shown that certain knob-negative (K-) lines can cytoadhere. In the present study, we have used electron microscopy to re-examine the interactions between K+ PRBCs and both C32 amelanotic melanoma cells and human umbilical vein endothelial cells (HUVEC).We confirm previous data demonstrating that C32 cells possess numerous microvilli which adhere to the PRBC, mainly via the knobs (Fig. 1). In contrast, the HUVEC were relatively smooth and the PRBCs appeared partially flattened onto the cell surface (Fig. 2). Furthermore, many of the PRBCs exhibited an invagination of the limiting membrane in the attachment zone, often containing a cytoplasmic process from the endothelial cell (Fig. 2).

Umbilical vein varix–Ergebnisse einer 6 Jahres Beobachtung an 20200 Schwangeren

2009 ◽  
Vol 213 (S 01) ◽  
Author(s):  
H Lebek ◽  
L Liepe ◽  
L Pfeiffer ◽  
B Belitz
Keyword(s):  
Umbilical Vein ◽  
Umbilical Vein Varix
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