Background: Hypocarbia causes slowing of background cerebral electrical ... median (range) of blood gas measurements were: pH: 7.3 (7.18 - 7.43); partial pressure of carbon dioxide (pCO2): 6. ...

Kety and Schmidt 3 demonstrated a 75 per cent increase in cerebral blood flow (average) in response to inhalation of 5 per cent carbon dioxide. They recorded minimal rises (1 to 6 mm. of mercury ...