[Fluid crystals of cholesterol-a new aid in the study of circulation]

A measuring method for model investigations is described. It is suitable for the velocity measurement and for evidence of strong local distortions of the velocity profile. The basis for this method are the regularities of the heat transport in streaming fluids. It was tested on silicone tube branches with a straight main branch. Clinically interesting induced flows can be produced if the flow is interrupted in one branch. A limited fluid exchange takes place in the closed branch then. This is important for the diagnostic and the planning of vascular surgery measures.