[Determination the individual normal values of cerebral hemodynamics in humans].
A new approach based on the adaptation and homeostasis concepts is proposed for determination of the individual normal value of cerebral blood circulation in apparently healthy humans. The homeostatic range of cerebrovascular reactivity was determined using hyper- and hypo- carbon dioxide functional test. Using a Transcranial Doppler, a mean blood flow velocity in the middle cerebral artery was measured. The homeostatic range limits of vasoreactivity may be considered as individual normal value limits of cerebral blood flow. An assessment of individual normal value of cerebral blood circulation allows to determine the operator's professional psychophysical readiness.
Volians'kyĭ
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D000222:Adaptation, Physiological / Q000502:physiology*; D000328:Adult; D001783:Blood Flow Velocity / Q000502:physiology; D002560:Cerebrovascular Circulation / Q000502:physiology*; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D000860:Hypoxia / Q000503:physiopathology; D020768:Middle Cerebral Artery / Q000000981:diagnostic imaging* / Q000502:physiology; D011237:Predictive Value of Tests; D012016:Reference Values; D017585:Ultrasonography, Doppler, Transcranial