The project will apply the methods of clinical observation experiment to study the central transport characteristics of flurbiprofen axetil by detecting S-flurbiprofen and R-flurbiprofen concentrations in cerebral-spinal fluid(CSF) after intravenous injection of flurbiprofen axetil in elderly patients.
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The concentrations of S-flurbiprofen and R-flurbiprofen in plasma and CSF of all patients.
Timeframe: perioperation