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Periodic oscillations of blood in the microcirculation of the sinus mucosa in the rabbit were studied with laser-Doppler flowmetry after the application of nose drops (oxymetazoline, xylometazoline and phenylephrine) to the nasal mucosa. All of these drugs induced a dose-dependent decrease in the blood flow in the mucosa. Flowmotion was found in 9 of 21 experiments after an approximately 50% reduction in blood flow had been induced. The concentrations of the drugs which caused vasomotion corresponded to those normally administered as nose drops to man.
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Bende et al. (2010) studied this question.
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