The effect of high concentrations of inspired oxygen on middle cerebral artery blood velocity measured by transcranial Doppler.
The effects of high concentrations of inspired oxygen on cerebrovascular haemodynamics were studied in healthy human volunteers using transcranial Doppler measurements of middle cerebral artery blood velocity. If the end-tidal carbon dioxide level was kept constant, the measured blood velocity and the calculated Pulsatility Index showed no significant change when subjects were breathing 21, 40, 75 or 100% oxygen.
Bew
S A
SA
Department of Anaesthesia, St George's Hospital Medical School, London.
Field
L M
LM
Droste
D W
DW
Razis
P
P
D000328:Adult; D001783:Blood Flow Velocity; D002536:Cerebral Arteries / Q000000981:diagnostic imaging / Q000502:physiology*; D002560:Cerebrovascular Circulation; D005260:Female; D006801:Humans; D008297:Male; D010100:Oxygen / Q000097:blood / Q000502:physiology*; D012119:Respiration; D017585:Ultrasonography, Doppler, Transcranial
D010100:Oxygen