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Your search keyword '"Boulay, G."' showing total 23 results
Start Over Author "Boulay, G." Publisher lippincott williams & wilkins
23 results on '"Boulay, G."'

18. Paradoxical dilation of the large cerebral arteries in hypocapnia in man.

Author

Radü EW and du Boulay GH

Subjects
Adult, Blood Pressure, Female, Humans, Male, Middle Aged, Carbon Dioxide blood, Cerebral Arteries physiology, Vasomotor System physiology
Abstract

By grouping patients who had carotid angiograms under unusually carefully monitored conditions it has been shown that hypocapnia is associated with vasodilation at low blood pressure but not at high blood pressure. The mechanism is discussed in general terms and it is suggested that the hypocapnic vasodilation may be a response to cerebral hypoxia and may be transmitted via an intracerebral autonomic pathway. Clinical and angiographical diagnoses are given for 50 patients.

Published
1976
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19. Variations in mean cerebral blood flow under anesthesia at rest and during cortical activation.

Author

Palmer NI, Thomas DJ, MacGillivray BB, Du Boulay GH, Marshall J, Russell RR, and Symon L

Subjects
Adolescent, Adult, Aged, Anesthesia, General, Anesthesia, Local, Humans, Middle Aged, Physical Stimulation, Blood Flow Velocity, Cerebrovascular Circulation
Abstract

More than one cerebral blood flow (CBF) measurement was performed on the same occasion in three groups of patients using the intracarotid 133Xenon technique. In the anesthetized group there was a highly significant reduction in CBF (mean = 24.3%) from the first to the second measurement. In those at rest under local anesthesia there was also a significant fall (mean 9.8%). The third group, who were stimulated during the second estimation, showed no change. A second CBF determination some time after beginning a study is recommended, especially in pharmacological studies, to provide a more reliable resting control, rather than the first value which represents flow in an "activated" brain which has not yet adapted fully to its new environment.

Published
1977
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20. Cerebrovascular CO2 reactivity of the fast and slow clearing compartments.

Author

Iliff LD, Zilkha E, Du Boulay GH, Marshall J, Russell RW, and Symon L

Subjects
Adult, Aged, Blood Flow Velocity, Blood Pressure, Carotid Artery, Internal, Female, Humans, In Vitro Techniques, Ischemic Attack, Transient physiopathology, Male, Middle Aged, Partial Pressure, Xenon, Carbon Dioxide blood, Cerebrovascular Circulation, Cerebrovascular Disorders physiopathology
Published
1974
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21. Arterial peaks in regional cerebral blood flow 133 Xenon clearance curves.

Author

Rosenbaum SG, Iliff LD, Bull JW, Du Boulay GH, Marshall J, Russell RW, and Symon L

Subjects
Adult, Aged, Anesthesia, General, Anesthesia, Local, Blood Pressure, Epilepsy physiopathology, Female, Humans, Intracranial Arteriovenous Malformations physiopathology, Ischemic Attack, Transient physiopathology, Male, Middle Aged, Xenon, Blood Flow Velocity, Cerebrovascular Circulation, Cerebrovascular Disorders physiopathology, Radioisotope Dilution Technique
Published
1973
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23. The relationship of the CO 2 reactivity of cerebral vessels to blood pressure and mean resting blood flow.

Author

Ackerman RH, Zilkha E, Bull JW, Du Boulay GH, Marshall J, Russell RW, and Symon L

Subjects
Adult, Blood Pressure, Cerebral Arteries physiology, Codeine pharmacology, Female, Humans, Male, Middle Aged, Oxygen blood, Promethazine pharmacology, Carbon Dioxide blood, Cerebrovascular Circulation, Vascular Resistance, Vasomotor System physiology
Published
1973
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