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So this confuses me...
In Goljan pp 566 blue box (3rd 3d)...he says that to prevent cerebral edema, you hyperventilate the patient to cause alkalosis which vasoconstricts because acidosis and hypoxemia--> vasodilation--> cerebral edema
In Costanzo BRS Phys she says: "When the brain is ischemic, the Pco2 increases and the chemoreceptors in the vasomotor center respond by INCREASING SYMPATHETICS to heart and blood vessel--> constriction--> increase TPR and MAP (aka Cushing's)"
Is it just me or these two seem to conflict each other. I may not be thinking correctly since it's almost midnight but I just want to get an answer for sure. Does acidosis and hypoxemia --> constriction of vessels or dilation of vessels?
Thanks!
In Goljan pp 566 blue box (3rd 3d)...he says that to prevent cerebral edema, you hyperventilate the patient to cause alkalosis which vasoconstricts because acidosis and hypoxemia--> vasodilation--> cerebral edema
In Costanzo BRS Phys she says: "When the brain is ischemic, the Pco2 increases and the chemoreceptors in the vasomotor center respond by INCREASING SYMPATHETICS to heart and blood vessel--> constriction--> increase TPR and MAP (aka Cushing's)"
Is it just me or these two seem to conflict each other. I may not be thinking correctly since it's almost midnight but I just want to get an answer for sure. Does acidosis and hypoxemia --> constriction of vessels or dilation of vessels?
Thanks!