الفهرس 
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Abstract
The aim of the present study was to make the best use of Epidural anesthesia and decrease its possible complications. The research objective was to assess the efficacy of perfusion index and
entropy as an indicator for intravascular injection of Dexmedetomidine-containing epidural test dose in anesthetized adults compared to adrenaline.
Patients were randomly allocated into one of three equal groups:
Patients allocated to group 1 received (n=15):
3 mL of 1.5% lidocaine containing 0.5µ/kg Dexmedetomidine IV as a
simulated test dose via a peripheral IV catheter over 30 s, flushed with 10
mL of saline.
Patients allocated to group 2 received (n=15):
3 mL of 1.5% lidocaine containing 15 µ Epinephrine IV as a simulated test
dose via a peripheral IV catheter over 30s, flushed with 10 mL of saline.
Patients allocated to group 3 received (n=15):
3 mL of 1.5% lidocaine via a peripheral IV catheter over 30s, flushed with
10 mL of saline.