The goal of this study is to compare the intraoperative hemodynamic status, characteristics of block of fractionated versus single bolus dose of Hyperbaric Bupivacaine in patient undergoing Transurethral Resection of Prostate(TURP) surgery under Subarachnoid block(SAB). Seventy-two patients aged 50 years and above belonging to American Physical status I and II are divided into two study group. Group B will receive Injection 0.5 % hyperbaric bupivacaine 2.5 ml single bolus dose and group F will receive same concentration and volume of hyperbaric bupivacaine with two third dose initially (i.e. 1.6 ml) and remaining one third dose (i.e. 0.9 ml) after 60 seconds at the rate of 0.2ml/sec.
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Comparision of mean arterial pressure(MAP) in both participants with subarachnoid block
Timeframe: Throughout study completion,an average of 3 months
Comparision of heart rate in both participants with subarachnoid block
Timeframe: Throughout study completion,an average of 3 months
Comparision of total consumption of vasopressors used during intraoperative period between the groups.
Timeframe: Throughout study completion,an average of 3 months