Two minute slope inhalation technique for cerebral blood flow measurement in man. 2. Clinical appraisal.
نویسندگان
چکیده
منابع مشابه
Two minute slope inhalation technique for cerebral blood flow measurement in man. 2. Clinical appraisal.
The two minute slope technique for measuring CBF was devised primarily to study the response of the cerebral circulation to physiological stimuli. In this paper, measurements of the precision of the technique when applied to various groups of people are described, and measurements on normal subjects of the global and regional CBF changes in response to hyperventilation and hypercapnia are prese...
متن کاملTwo minute slope inhalation technique for cerebral blood flow measurement in man. 1. Method.
The two minute slope method of measuring cerebral blood flow (CBF) by inhalation of 133Xe is described. It requires the subject to remain still for only two minutes and is thus applicable to a wide variety of patients and to investigations involving brief physiological stimuli. The influence of extracerebral blood flow on CBF calculated by this method has been studied. Results from the two minu...
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The brain has a high blood flow to meet its high obligatory requirement for glucose as a metabolic fuel. Indeed, glucose requirement and blood flow are directly coupled so that the increased metabolic rate during enhanced functional activity of a particular cortical area is associated with increased blood flow. Here a brief review will be given of the most important methods that can be used for...
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Measurement of blood flow and the effects of different factors on tissue blood flow are important fields of research in physiology and pharmacology. So far, different methods have been innovated, using laser light is the Last one. In this article history, principles and specifications of laser technique along with its advantages and disadvantages ( in comparison with other methods) are revie...
متن کاملSpectrum subtraction technique for minimizing extracranial influence on cerebral blood flow measurements by 133xenon inhalation.
Estimates of regional cerebral blood flow (rCBF) by the 133Xe inhalation method are influenced by isotope contamination from slow clearing extracerebral tissues. Subtraction of x-ray (31 kev) from gamma-ray counts (81 kev) has been suggested as a means of yielding clearance curves that are relatively free of such contamination. In the present study, rCBF measurements based on the total 133Xe sp...
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ژورنال
عنوان ژورنال: Journal of Neurology, Neurosurgery & Psychiatry
سال: 1976
ISSN: 0022-3050
DOI: 10.1136/jnnp.39.2.147