The Effect of Retrobulbar Block for Eye Surgery on Brain Oxygenation and Cognitive Functions in Elderly Patients
Status:
Completed
Trial end date:
2016-01-01
Target enrollment:
Participant gender:
Summary
The investigators measured changes in cerebral oxygen saturation (rSO2) and MMSE scores after
retrobulbar block performed with levobupivacaine and lidocaine in patients undergoing
vitreoretinal surgery.A total of 66 patients over the age of 60 undergoing vitreoretinal
surgery with a total duration of less than 1 hour were included in this prospective,
double-blinded study. The patients were randomly divided into two groups: group L (5ml, 2%
lidocaine) and group LB (5ml, 0.5% levobupivacaine). Bilateral rSO2 measurements were
recorded before the retrobulbar block and at 1-5 minutes post-block, during the procedure,
and at 10-40 minutes post-op. MMSE was performed preoperatively and postoperatively in order
to evaluate short term cognitive function. Sensory and motor block durations, pain, akinesia
and conjunctival feeling scores, patient-surgeon satisfaction, and complications were also
recorded.