The Application Of Cerebral Oximetry In The Monitoring Of Cerebral Oxygen Balance

Object:To estimate the safe in the induced hypotension with nitroprusside by the change of regional cerebral oxygen saturation(rSO₂) in young and old age-group.Methods:Two groups were selected in the study,one of which was 18～30 years old and the other was 60～85 years old.Their rSO₂,arterial blood pressure(ABP),cardiac output(CO)were continuously monitored and recorded during perioperative period.To observe the change of rSO₂ in the induced hypotension with nitroprusside.Results:MAP was different from before and after induced hypotension; There was a significant difference in older age-group in rSO₂ from before and after induced hypotension,the change in young age-group was tiny; The CO of the young group was different from before and after induced hypotension;The parameter of blood gas had no difference from before and after induced.Conclusions:The rSO₂ monitoring in the induced hypotension with nitroprusside is significant to cerebral oxygen balance.The patient of young age-group is safty in the range of MAP decreased 30 percent than base pressure level,but the patient of old age-grounp need promptly and accurate method to monitor the change cerebral oxygen balance to estimate the safe. OBJECT:To investigate the management of cerebral oxygen balance during neck regional main artery surgery by the monitoring of near-infrared spectrometer.METHODS:Twenty patients(ten with carotid artery stenosis,ten with carotid body tumor)were enrolled in the study,their rSO₂,artery blood pressure and carotid reverse blood pressure were continuously monitored and recorded during perioperative period.RESULTS:There was a significant difference in rSO₂ between two side rSO₂ monitoring;The rSO₂ of the patients with carotid body tumor during carotid clamping was different from before and after clamped carotid; The short time change of rSO₂ of patients with carotid artery stenosis between before clamped and after clamped carotid is different.Two patients underwent artery bypass operation for the reflu pressure of internal carotid artery was too low.CONCLUSION:The rSO₂ monitoring during neck regional main artery surgery is significant to cerebral oxygen balance.