Key result
The decrease in apparent blood viscosity in narrow tubes may be explained by unsheared laminae or a cell-free marginal zone, with a dog's hind limb vascular bed effective diameter calculated as 55 µ.
Authors
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May refine microcirculatory flow models; leaves open human validation beyond canine data.
Robert H. Haynes (1960) studied this question. Tube radius and hematocrit was evaluated on Apparent viscosity of blood in narrow tubes (Fahraeus-Lindqvist effect). The decrease in apparent blood viscosity in narrow tubes may be explained by unsheared laminae or a cell-free marginal zone, with a dog's hind limb vascular bed effective diameter calculated as 55 µ.
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