Rheologische Messungen an Polyisobutylenlösungen im Weissenberg-Rheogoniometer

2007 ◽  
pp. 90-101 ◽  
Author(s):  
S. Krozer ◽  
J. Schurz
Keyword(s):  
Weissenberg Rheogoniometer

Biorheological methods employing the Weissenberg Rheogoniometer

Biorheology ◽  
1984 ◽  
Vol 23 (s1) ◽  
pp. 23-34 ◽  
Author(s):  
R.G. King ◽  
S. Chien ◽  
S. Usami ◽  
A.L. Copley
Keyword(s):  
Weissenberg Rheogoniometer

Paper 7: Properties of Synovial Fluid

1966 ◽  
Vol 181 (10) ◽  
pp. 25-29 ◽  
Author(s):  
D. V. Davies
Keyword(s):  
Hyaluronic Acid ◽  
Synovial Fluid ◽  
Normal Animal ◽  
Chemical Components ◽  
Weissenberg Rheogoniometer ◽  
Nutritive Medium ◽  
Shear Rates ◽  
Joint Lubrication ◽  
Normal Human ◽  
Human Joints

Synovial fluid functions both as a lubricant and as a nutritive medium in joints. Its chemical composition suggests that it is a dialysate of blood plasma with the addition of the mucosubstance, hyaluronic acid. In addition the fluid contains a small cellular component. The quantities of some of the chemical components are apparently anomalous and need explanation. The hyaluronic acid, probably combined with a small amount of protein, is believed to be secreted by the cells lining the joint cavity, the synovial cells. The volume and naked eye appearance of the fluid vary from joint to joint in the same species and in the same joint from species to species. The volume of fluid that can be aspirated from normal human joints is too small for most chemical and physical investigations and recourse must be made to fluids from the larger domestic animals and to pathological human fluids. The most characteristic property of the fluid is its viscosity. This has been investigated using the Weissenberg rheogoniometer. This allows of a study of the viscosity and elasticity of the fluids at different shear rates. Results on fluid from both normal animal joints and pathological human joints will be presented. Their relevance in joint lubrication will be discussed.

An experimental analysis of the Weissenberg rheogoniometer

1966 ◽  
Vol 5 (3) ◽  
pp. 212-215 ◽  
Author(s):  
K. Bogie ◽  
J. Harris
Keyword(s):  
Experimental Analysis ◽  
Weissenberg Rheogoniometer

Chemorheological Studies of the Effect of Heparin on the Course of Coagulation

1976 ◽  
Vol 35 (02) ◽  
pp. 447-459
Author(s):  
K. A Overholser ◽  
C. B Baysinger ◽  
T. R Harris ◽  
T Deveau
Keyword(s):  
Whole Blood ◽  
Partial Thromboplastin Time ◽  
Time Course ◽  
Normal Subjects ◽  
Activated Partial Thromboplastin Time ◽  
Weissenberg Rheogoniometer ◽  
Rheological Measurements ◽  
Kinetics Of

SummaryThe influence of sodium heparin on viscoelastic change during coagulation was determined in vitro for whole blood samples from ten normal subjects at heparin concentrations ranging from 0 to 1.45 units/(ml whole blood). A four-parameter chemorheological model was used to describe the time course of coagulation as measured by the Weissenberg Rheogoniometer. One parameter compares closely with the whole blood activated partial thromboplastin time, while the other three may be related to the chemical kinetics of clotting.The chemorheological model and experimental techniques were then tested in a dog preparation. It was found that rheological measurements are more self-consistent than either thrombelastography or the activated partial thromboplastin time for the assay of in vivo heparin in two dogs.

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