The charactereistics of a spinal block varies with the dose of local anaesthetic and the
adjuvant used. Literature review did not show comparison of different doses of
dexmedetomidine with low-dose bupivacaine in saddle block. The rationale of this study is to
determine an optimum dose of dexmedetomidine which in combination with low dose bupivacaine
would provide satisfactory block with hemodynamic stability. This would be beneficial for
patients scheduled for turp, as these pts are mostly elderly with various comorbidities.