After ethical committee approval and informed consent, patients will be recruited for the study. Preoperative evaluation is doneand  the subjects will be randomized via computer generated table and  allocated to one of the groups.  Group B:  3.6 ml of  0.5%  hyperbaric Bupivacaine, Group F : 3.6 ml of  0.5%  hyperbaric Bupivacaine in fractionated approach.   Demographic details (Age, sex, weight, ASA status, height) will be noted.

As a standard practice, pre-operatively patients will be kept fasting for 6 hours. They will be routinely premedicated with Tab. Alprazolam 0.5 mg and Tab. Pantoprazole 40 mg on the night prior to surgery and on the morning of surgery. 

Intraoperatively patients will be monitored by electrocardiography, non-invasive blood pressure and pulse oximetry.  In group B - Spinal anesthesia will be given with 3.6cc of 0.5% heavy Bupivacaine at L3-4 interspace via 25 G spinal needle, with subject  in the sitting position . In group F - Spinal anesthesia  of 3.6cc of 0.5% heavy Bupivacaine at L3-4 interspace via 25 G spinal needle will be given in a fractionated approach where 2.4cc(2/3^rd) will be given first and then the remaining 1.2ml (1/3^rd) will be given after 120sec.The subject will made to lie supinesoon  after the injection. At 5 mins after the injection, level of block –sensory by pinprick and motor by bromage scale will be checked. This  will be considered as onset of sensory and motor block.  At 20min, the peak level of sensory and motor block willalso  be noted.

The duration of spinal anesthesia is considered as two segment regression from  the level of sensory block achieved  at 20min(peak) of sensory block . At the end of surgery, both the sensory level and motor block will be rechecked. Vitals such as   Heart rate (HR),   Systolic blood pressure (SBP), Diastolic blood pressure (DBP), Mean arterial blood pressure (MAP), saturation (SpO2) will be measured at every  5 mins for 1^sthour and then 10min till the end of surgery.

Any side effects of the spinal anesthesia  such as: Bradycardia (HR < 20% of baseline), Hypotension (BP < 25% of baseline), Respiratory depression, Sedation, Pruritis and Nausea/ Vomiting will be noted and treated appropriately. Bradycardia will be treated with Injection Atropine 20mcg/kg IV and Hypotension by IV fluids/ injection Mephentermine 3 mg  IV boluses.

The data will be collected in the study proforma and analyzed for statistical significance with the statistician.