A New Model-Free Index of Dynamic Cerebral Blood Flow Autoregulation
نویسندگان
چکیده
منابع مشابه
A New Model-Free Index of Dynamic Cerebral Blood Flow Autoregulation
The classic dynamic autoregulatory index (ARI), proposed by Aaslid and Tiecks, is one of the most widely used methods to assess the efficiency of dynamic cerebral autoregulation. Although this index is often used in clinical research and is also included in some commercial equipment, it exhibits considerable intra-subject variability, and has the tendency to produce false positive results in cl...
متن کاملAutoregulation of Cerebral Blood Flow
Autoregulation of cerebral blood flow (constant perfusion despite variations in blood pressure) was studied in 15 control subjects and in 24 patients with cerebral vascular lesions. Thirteen patients were studied within the first 2 days of an episode of cerebral ischemia ("acute" group); 11 were studied from 15 days to several months after an ischemic episode ("chronic" group). Measurements of ...
متن کاملA comparison of dynamic cerebral autoregulation across changes in cerebral blood flow velocity for 200 s
OBJECTIVES The dynamic interaction between blood pressure (BP) and cerebral blood flow velocity (CBFV) is not fully understood, especially for CBFV changes lasting longer than 50 s. The interaction between BP and CBFV is relatively well characterized for periods <50 s using transfer function (TF) estimations of phase, gain, and coherence. We used TF estimations to compare the phase and gain for...
متن کاملModelling cerebral blood flow autoregulation in humans
Better understanding of the determinants of cerebral blood flow (CBF) and the interpretation of clinical measurements can benefit from quantitative modelling of CBF regulatory mechanisms and their interaction with other haemodynamic variables such as intracranial pressure and blood gases. Mathematical models have been able to reproduce many known phenomena and to extract relevant parameters for...
متن کاملCerebral blood flow autoregulation in the rat.
Cerebral blood flow autoregulation (CBFA) to changes in perfusion pressure has not been previously reported in the rat. A modification of the Kety and Schmidt technique employing 133Xenon was used to measure cerebral blood flow (CBF) in paralyzed adult Sprague Dawley rats passively ventilated with 70% nitrous oxide and 30% oxygen. At a mean arterial blood pressure (MABP) of 121 +/- 19 mm Hg, an...
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ژورنال
عنوان ژورنال: PLoS ONE
سال: 2014
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0108281