With regard to cerebral autoregulation:
a. cerebral blood flow is constant over a diastolic blood pressure of 60 to 140 mmHg
b. autoregulation is lost during the acute phase of subarachnoid haemorrhage
c. it is impaired in hypercapnia
d. it is impaired in hypoxia
a. cerebral blood flow is constant over a diastolic blood pressure of 60 to 140 mmHg
b. autoregulation is lost during the acute phase of subarachnoid haemorrhage
c. it is impaired in hypercapnia
d. it is impaired in hypoxia