Why the study?
Does controlled hypotension with sodium nitroprusside alter cerebral blood flow and metabolism in patients undergoing total hip replacement?
Does controlled hypotension with sodium nitroprusside alter cerebral blood flow and metabolism in patients undergoing total hip replacement?
Sodium nitroprusside-induced hypotension during total hip replacement does not significantly alter overall cerebral blood flow or metabolism, but individual variability necessitates close monitoring.
Substantial individual CBF variability during nitroprusside hypotension warrants close monitoring; leaves open predictors of cerebral stability in orthopedic surgery.
Cerebral blood flow (CBF) and cerebral metabolic rate of oxygen (CMRO2) were studied during hypotension induced with sodium nitroprusside (SNP) in 10 patients undergoing total hip replacement a.m. Charnley. Cerebral blood flow was measured using an injection of xenon-133 into an arm vein. The decay curve was detected by five scintillation counters placed over each hemisphere and analysed with the Novo 10a cerebrograph. Blood samples were drawn from the radial artery and the jugular venous bulb to calculate the CMRO2. In the group as a whole, there were significant decreases in mean arterial pressure and in cerebrovascular resistance. There were no significant changes, in either CBF or CMRO2 in the group as a whole, but there were substantial individual differences. In conclusion, the use of SNP-induced hypotension for extracranial surgery should be used only in patients monitored closely.
No takes yet. Share an insight, caveat, or question.
Bünemann et al. (1987) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: