scholarly journals Rouleaux Formation Count

2020 ◽  
Author(s):  
Keyword(s):  
Rouleaux Formation

Evaluation of 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid in the inhibition of rouleaux formation

Transfusion ◽  
1996 ◽  
Vol 36 (2) ◽  
pp. 109-112 ◽  
Author(s):  
SS Norris ◽  
DD Allen ◽  
TP Neff ◽  
SL Wilkinson
Keyword(s):  
Disulfonic Acid ◽  
Rouleaux Formation

Indocyanine green angiography imaging findings in artery occlusions

2021 ◽  
pp. 112067212110378
Author(s):  
Ramesh Venkatesh ◽  
Nikitha Gurram Reddy ◽  
Vishma Prabhu ◽  
Pukhraj Rishi ◽  
Arpitha Pereira ◽  
...  
Keyword(s):  
Indocyanine Green ◽  
Multimodal Imaging ◽  
Indocyanine Green Angiography ◽  
Retinal Vessel ◽  
Retinal Artery Occlusion ◽  
Artery Occlusion ◽  
Imaging Features ◽  
Retinal Artery ◽  
Choroidal Perfusion ◽  
Rouleaux Formation

Purpose: To describe the multimodal imaging features including indocyanine green angiography (ICGA) in cases diagnosed clinically as central retinal artery occlusion (CRAO) at its different disease stages. Methods: In this retrospective observational study, patients diagnosed clinically as CRAO or hemi-CRAO were included. All patients underwent multimodal imaging with optical coherence tomography (OCT), fundus fluorescein angiography (FFA) and indocyanine green angiography (ICGA) were studied. Analysis of ICGA images in different stages of artery occlusions and its correlation with accompanying FFA and OCT images was done. Results: Eight such studies in five patients were available for analysis. The most important observation noted on ICGA was the presence of hypercyanescent spots seen during the acute stages of the disease in four of the five cases. The spots were accompanied by retinal vessel staining on FFA in the corresponding region. As the disease showed signs of resolution, the hypercyanescent spots on ICGA and retinal vessel staining on FFA disappeared. The hypercyanescent spots seen on the ICGA were noted due to the red blood cell aggregation or ‘rouleaux’ formation. In addition, choroidal perfusion abnormalities were noted on ICGA in all five cases in the acute stage. Conclusion: Choroidal perfusion changes can be identified in acute phase of retinal artery occlusion. Rouleaux formation in the retinal circulation occurs due to the slowing of the blood flow following artery occlusion. These are seen as hypercyanescent spots in the late phase on ICGA.

Kinetics of rouleaux formation using TV image analyzer. I. Human erythrocytes

1983 ◽  
Vol 245 (2) ◽  
pp. H252-H258 ◽  
Author(s):  
T. Shiga ◽  
K. Imaizumi ◽  
N. Harada ◽  
M. Sekiya
Keyword(s):  
Ph Effect ◽  
Three Dimensional ◽  
Image Analyzer ◽  
Autologous Plasma ◽  
Human Fibrinogen ◽  
Shear Rates ◽  
Lower Shear ◽  
Time Courses ◽  
The Individual ◽  
Rouleaux Formation

An apparatus for determining the velocity of erythrocyte rouleaux formation was constructed, combining an inverted microscope, a transparent cone-plate viscometer, a TV image analyzer, and a computer. At lower shear rates, the overall process is the sedimentation and the rouleaux formation followed by the development of three-dimensional aggregates. The individual erythrocyte could be observed and the process was expressed by the time courses of the changes in the count and area of particles; taking the computed increment in the area/count, the rate of rouleaux formation could be estimated. The effects of shear rates, hematocrits, plasma proteins, and pH were quantified. The rate of rouleaux formation in autologous plasma increased by (1) lowering the shear rates (1.9 less than or equal to gamma less than or equal to 15 s-1),2) increasing the hematocrit (up to 0.6%), 3) adding human fibrinogen (up to 600 mg/dl) or gamma-globulin, and 4) increasing pH. The transformation to echinocytes or to stomatocytes decreased the rate of rouleaux formation. The pH effect was explained by the increase in mean corpuscular volume at lower pH rather than by the changes in the electrostatic repulsion or in the protein binding.

Simulation of rouleaux formation of elastic red blood cells

2004 ◽  
Vol 2004.16 (0) ◽  
pp. 59-60
Author(s):  
Masatoshi Sato ◽  
Shigeo Wada ◽  
Ryo Kobayashi ◽  
Kenichi Tsubota ◽  
Takami Yamaguchi
Keyword(s):  
Red Blood Cells ◽  
Blood Cells ◽  
Rouleaux Formation

scholarly journals Boundary-element calculations to examine the change in dielectric spectra for erythrocytes in suspension with rouleaux formation.

2003 ◽  
Vol 43 (supplement) ◽  
pp. S221
Author(s):  
K. Sekine ◽  
A. Matsuo ◽  
Y. Tobita ◽  
C. Hibino ◽  
K. Asami
Keyword(s):  
Boundary Element ◽  
Dielectric Spectra ◽  
Rouleaux Formation
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